| /****************************************************************************** |
| * * |
| * easycap_main.c * |
| * * |
| * Video driver for EasyCAP USB2.0 Video Capture Device DC60 * |
| * * |
| * * |
| ******************************************************************************/ |
| /* |
| * |
| * Copyright (C) 2010 R.M. Thomas <rmthomas@sciolus.org> |
| * |
| * |
| * This is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * The software is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this software; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| /*****************************************************************************/ |
| |
| #include "easycap.h" |
| #include "easycap_standard.h" |
| |
| int easycap_debug; |
| module_param(easycap_debug, int, S_IRUGO | S_IWUSR); |
| |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * PARAMETERS APPLICABLE TO ENTIRE DRIVER, I.E. BOTH VIDEO AND AUDIO |
| */ |
| /*---------------------------------------------------------------------------*/ |
| struct usb_device_id easycap_usb_device_id_table[] = { |
| { USB_DEVICE(USB_EASYCAP_VENDOR_ID, USB_EASYCAP_PRODUCT_ID) }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(usb, easycap_usb_device_id_table); |
| struct usb_driver easycap_usb_driver = { |
| .name = "easycap", |
| .id_table = easycap_usb_device_id_table, |
| .probe = easycap_usb_probe, |
| .disconnect = easycap_usb_disconnect, |
| }; |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * PARAMETERS USED WHEN REGISTERING THE VIDEO INTERFACE |
| * |
| * NOTE: SOME KERNELS IGNORE usb_class_driver.minor_base, AS MENTIONED BY |
| * CORBET ET AL. "LINUX DEVICE DRIVERS", 3rd EDITION, PAGE 253. |
| * THIS IS THE CASE FOR OpenSUSE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| const struct file_operations easycap_fops = { |
| .owner = THIS_MODULE, |
| .open = easycap_open, |
| .release = easycap_release, |
| .unlocked_ioctl = easycap_ioctl, |
| .poll = easycap_poll, |
| .mmap = easycap_mmap, |
| .llseek = no_llseek, |
| }; |
| struct vm_operations_struct easycap_vm_ops = { |
| .open = easycap_vma_open, |
| .close = easycap_vma_close, |
| .fault = easycap_vma_fault, |
| }; |
| struct usb_class_driver easycap_class = { |
| .name = "usb/easycap%d", |
| .fops = &easycap_fops, |
| .minor_base = USB_SKEL_MINOR_BASE, |
| }; |
| |
| /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/ |
| #if defined(EASYCAP_IS_VIDEODEV_CLIENT) |
| #if defined(EASYCAP_NEEDS_V4L2_FOPS) |
| const struct v4l2_file_operations v4l2_fops = { |
| .owner = THIS_MODULE, |
| .open = easycap_open_noinode, |
| .release = easycap_release_noinode, |
| .unlocked_ioctl = easycap_ioctl, |
| .poll = easycap_poll, |
| .mmap = easycap_mmap, |
| }; |
| #endif /*EASYCAP_NEEDS_V4L2_FOPS*/ |
| int video_device_many /*=0*/; |
| struct video_device *pvideo_array[VIDEO_DEVICE_MANY], *pvideo_device; |
| #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/ |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * PARAMETERS USED WHEN REGISTERING THE AUDIO INTERFACE |
| */ |
| /*--------------------------------------------------------------------------*/ |
| const struct file_operations easysnd_fops = { |
| .owner = THIS_MODULE, |
| .open = easysnd_open, |
| .release = easysnd_release, |
| .unlocked_ioctl = easysnd_ioctl, |
| .read = easysnd_read, |
| .llseek = no_llseek, |
| }; |
| struct usb_class_driver easysnd_class = { |
| .name = "usb/easysnd%d", |
| .fops = &easysnd_fops, |
| .minor_base = USB_SKEL_MINOR_BASE, |
| }; |
| /****************************************************************************/ |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * IT IS NOT APPROPRIATE FOR easycap_open() TO SUBMIT THE VIDEO URBS HERE, |
| * BECAUSE THERE WILL ALWAYS BE SUBSEQUENT NEGOTIATION OF TV STANDARD AND |
| * FORMAT BY IOCTL AND IT IS INADVISABLE TO HAVE THE URBS RUNNING WHILE |
| * REGISTERS OF THE SA7113H ARE BEING MANIPULATED. |
| * |
| * THE SUBMISSION OF VIDEO URBS IS THEREFORE DELAYED UNTIL THE IOCTL COMMAND |
| * STREAMON IS RECEIVED. |
| */ |
| /*--------------------------------------------------------------------------*/ |
| /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/ |
| #if defined(EASYCAP_IS_VIDEODEV_CLIENT) |
| int |
| easycap_open_noinode(struct file *file) |
| { |
| return easycap_open((struct inode *)NULL, file); |
| } |
| #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/ |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| int |
| easycap_open(struct inode *inode, struct file *file) |
| { |
| #if (!defined(EASYCAP_IS_VIDEODEV_CLIENT)) |
| struct usb_interface *pusb_interface; |
| #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/ |
| struct usb_device *p; |
| struct easycap *peasycap; |
| int i, k, m, rc; |
| |
| JOT(4, "\n"); |
| SAY("==========OPEN=========\n"); |
| |
| peasycap = (struct easycap *)NULL; |
| #if (!defined(EASYCAP_IS_VIDEODEV_CLIENT)) |
| if ((struct inode *)NULL == inode) { |
| SAY("ERROR: inode is NULL.\n"); |
| return -EFAULT; |
| } |
| pusb_interface = usb_find_interface(&easycap_usb_driver, iminor(inode)); |
| if (!pusb_interface) { |
| SAY("ERROR: pusb_interface is NULL.\n"); |
| return -EFAULT; |
| } |
| peasycap = usb_get_intfdata(pusb_interface); |
| /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/ |
| #else |
| for (i = 0; i < video_device_many; i++) { |
| pvideo_device = pvideo_array[i]; |
| if ((struct video_device *)NULL != pvideo_device) { |
| peasycap = (struct easycap *)video_get_drvdata(pvideo_device); |
| break; |
| } |
| } |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/ |
| if ((struct easycap *)NULL == peasycap) { |
| SAY("MISTAKE: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| file->private_data = peasycap; |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * INITIALIZATION |
| */ |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "starting initialization\n"); |
| |
| for (k = 0; k < FRAME_BUFFER_MANY; k++) { |
| for (m = 0; m < FRAME_BUFFER_SIZE/PAGE_SIZE; m++) |
| memset(peasycap->frame_buffer[k][m].pgo, 0, PAGE_SIZE); |
| } |
| p = peasycap->pusb_device; |
| if ((struct usb_device *)NULL == p) { |
| SAY("ERROR: peasycap->pusb_device is NULL\n"); |
| return -EFAULT; |
| } else { |
| JOT(16, "0x%08lX=peasycap->pusb_device\n", \ |
| (long int)peasycap->pusb_device); |
| } |
| rc = wakeup_device(peasycap->pusb_device); |
| if (0 == rc) |
| JOT(8, "wakeup_device() OK\n"); |
| else { |
| SAY("ERROR: wakeup_device() returned %i\n", rc); |
| return -EFAULT; |
| } |
| rc = setup_stk(p); peasycap->input = 0; |
| if (0 == rc) |
| JOT(8, "setup_stk() OK\n"); |
| else { |
| SAY("ERROR: setup_stk() returned %i\n", rc); |
| return -EFAULT; |
| } |
| rc = setup_saa(p); |
| if (0 == rc) |
| JOT(8, "setup_saa() OK\n"); |
| else { |
| SAY("ERROR: setup_saa() returned %i\n", rc); |
| return -EFAULT; |
| } |
| rc = check_saa(p); |
| if (0 == rc) |
| JOT(8, "check_saa() OK\n"); |
| else if (-8 < rc) |
| SAY("check_saa() returned %i\n", rc); |
| else { |
| SAY("ERROR: check_saa() returned %i\n", rc); |
| return -EFAULT; |
| } |
| peasycap->standard_offset = -1; |
| /*---------------------------------------------------------------------------*/ |
| #if defined(PREFER_NTSC) |
| |
| rc = adjust_standard(peasycap, V4L2_STD_NTSC_M); |
| if (0 == rc) |
| JOT(8, "adjust_standard(.,NTSC_M) OK\n"); |
| else { |
| SAY("ERROR: adjust_standard(.,NTSC_M) returned %i\n", rc); |
| return -EFAULT; |
| } |
| rc = adjust_format(peasycap, 640, 480, V4L2_PIX_FMT_UYVY, V4L2_FIELD_NONE, \ |
| false); |
| if (0 <= rc) |
| JOT(8, "adjust_format(.,640,480,UYVY) OK\n"); |
| else { |
| SAY("ERROR: adjust_format(.,640,480,UYVY) returned %i\n", rc); |
| return -EFAULT; |
| } |
| |
| #else |
| |
| rc = adjust_standard(peasycap, \ |
| (V4L2_STD_PAL_B | V4L2_STD_PAL_G | V4L2_STD_PAL_H | \ |
| V4L2_STD_PAL_I | V4L2_STD_PAL_N)); |
| if (0 == rc) |
| JOT(8, "adjust_standard(.,PAL_BGHIN) OK\n"); |
| else { |
| SAY("ERROR: adjust_standard(.,PAL_BGHIN) returned %i\n", rc); |
| return -EFAULT; |
| } |
| rc = adjust_format(peasycap, 640, 480, V4L2_PIX_FMT_UYVY, V4L2_FIELD_NONE, \ |
| false); |
| if (0 <= rc) |
| JOT(8, "adjust_format(.,640,480,uyvy,false) OK\n"); |
| else { |
| SAY("ERROR: adjust_format(.,640,480,uyvy,false) returned %i\n", rc); |
| return -EFAULT; |
| } |
| |
| #endif /* !PREFER_NTSC*/ |
| /*---------------------------------------------------------------------------*/ |
| rc = adjust_brightness(peasycap, -8192); |
| if (0 != rc) { |
| SAY("ERROR: adjust_brightness(default) returned %i\n", rc); |
| return -EFAULT; |
| } |
| rc = adjust_contrast(peasycap, -8192); |
| if (0 != rc) { |
| SAY("ERROR: adjust_contrast(default) returned %i\n", rc); |
| return -EFAULT; |
| } |
| rc = adjust_saturation(peasycap, -8192); |
| if (0 != rc) { |
| SAY("ERROR: adjust_saturation(default) returned %i\n", rc); |
| return -EFAULT; |
| } |
| rc = adjust_hue(peasycap, -8192); |
| if (0 != rc) { |
| SAY("ERROR: adjust_hue(default) returned %i\n", rc); |
| return -EFAULT; |
| } |
| /*---------------------------------------------------------------------------*/ |
| rc = usb_set_interface(peasycap->pusb_device, peasycap->video_interface, \ |
| peasycap->video_altsetting_on); |
| if (0 == rc) |
| JOT(8, "usb_set_interface(.,%i,%i) OK\n", peasycap->video_interface, \ |
| peasycap->video_altsetting_on); |
| else { |
| SAY("ERROR: usb_set_interface() returned %i\n", rc); |
| return -EFAULT; |
| } |
| rc = start_100(p); |
| if (0 == rc) |
| JOT(8, "start_100() OK\n"); |
| else { |
| SAY("ERROR: start_100() returned %i\n", rc); |
| return -EFAULT; |
| } |
| peasycap->video_isoc_sequence = VIDEO_ISOC_BUFFER_MANY - 1; |
| peasycap->video_idle = 0; |
| peasycap->video_junk = 0; |
| for (i = 0; i < 180; i++) |
| peasycap->merit[i] = 0; |
| peasycap->video_eof = 0; |
| peasycap->audio_eof = 0; |
| |
| do_gettimeofday(&peasycap->timeval7); |
| |
| peasycap->fudge = 0; |
| |
| JOT(4, "finished initialization\n"); |
| return 0; |
| } |
| /*****************************************************************************/ |
| int |
| submit_video_urbs(struct easycap *peasycap) |
| { |
| struct data_urb *pdata_urb; |
| struct urb *purb; |
| struct list_head *plist_head; |
| int j, isbad, m, rc; |
| int isbuf; |
| |
| if ((struct list_head *)NULL == peasycap->purb_video_head) { |
| SAY("ERROR: peasycap->urb_video_head uninitialized\n"); |
| return -EFAULT; |
| } |
| if ((struct usb_device *)NULL == peasycap->pusb_device) { |
| SAY("ERROR: peasycap->pusb_device is NULL\n"); |
| return -EFAULT; |
| } |
| if (!peasycap->video_isoc_streaming) { |
| |
| |
| |
| |
| |
| |
| |
| |
| JOT(4, "submission of all video urbs\n"); |
| if (0 != ready_saa(peasycap->pusb_device)) { |
| SAY("ERROR: not ready to capture after waiting " \ |
| "one second\n"); |
| SAY("..... continuing anyway\n"); |
| } |
| isbad = 0; m = 0; |
| list_for_each(plist_head, (peasycap->purb_video_head)) { |
| pdata_urb = list_entry(plist_head, struct data_urb, list_head); |
| if (NULL != pdata_urb) { |
| purb = pdata_urb->purb; |
| if (NULL != purb) { |
| isbuf = pdata_urb->isbuf; |
| purb->interval = 1; |
| purb->dev = peasycap->pusb_device; |
| purb->pipe = \ |
| usb_rcvisocpipe(peasycap->pusb_device,\ |
| peasycap->video_endpointnumber); |
| purb->transfer_flags = URB_ISO_ASAP; |
| purb->transfer_buffer = \ |
| peasycap->video_isoc_buffer[isbuf].pgo; |
| purb->transfer_buffer_length = \ |
| peasycap->video_isoc_buffer_size; |
| purb->complete = easycap_complete; |
| purb->context = peasycap; |
| purb->start_frame = 0; |
| purb->number_of_packets = \ |
| peasycap->video_isoc_framesperdesc; |
| |
| for (j = 0; j < peasycap->\ |
| video_isoc_framesperdesc; j++) { |
| purb->iso_frame_desc[j].\ |
| offset = j * \ |
| peasycap->\ |
| video_isoc_maxframesize; |
| purb->iso_frame_desc[j].\ |
| length = peasycap->\ |
| video_isoc_maxframesize; |
| } |
| |
| rc = usb_submit_urb(purb, GFP_KERNEL); |
| if (0 != rc) { |
| isbad++; |
| SAY("ERROR: usb_submit_urb() failed " \ |
| "for urb with rc:\n"); |
| switch (rc) { |
| case -ENOMEM: { |
| SAY("ENOMEM\n"); |
| break; |
| } |
| case -ENODEV: { |
| SAY("ENODEV\n"); |
| break; |
| } |
| case -ENXIO: { |
| SAY("ENXIO\n"); |
| break; |
| } |
| case -EINVAL: { |
| SAY("EINVAL\n"); |
| break; |
| } |
| case -EAGAIN: { |
| SAY("EAGAIN\n"); |
| break; |
| } |
| case -EFBIG: { |
| SAY("EFBIG\n"); |
| break; |
| } |
| case -EPIPE: { |
| SAY("EPIPE\n"); |
| break; |
| } |
| case -EMSGSIZE: { |
| SAY("EMSGSIZE\n"); |
| break; |
| } |
| default: { |
| SAY("unknown error code %i\n",\ |
| rc); |
| break; |
| } |
| } |
| } else { |
| m++; |
| } |
| } else { |
| isbad++; |
| } |
| } else { |
| isbad++; |
| } |
| } |
| if (isbad) { |
| JOT(4, "attempting cleanup instead of submitting\n"); |
| list_for_each(plist_head, (peasycap->purb_video_head)) { |
| pdata_urb = list_entry(plist_head, struct data_urb, \ |
| list_head); |
| if (NULL != pdata_urb) { |
| purb = pdata_urb->purb; |
| if (NULL != purb) |
| usb_kill_urb(purb); |
| } |
| } |
| peasycap->video_isoc_streaming = 0; |
| } else { |
| peasycap->video_isoc_streaming = 1; |
| JOT(4, "submitted %i video urbs\n", m); |
| } |
| |
| |
| |
| |
| |
| |
| } else { |
| JOT(4, "already streaming video urbs\n"); |
| } |
| return 0; |
| } |
| /*****************************************************************************/ |
| int |
| kill_video_urbs(struct easycap *peasycap) |
| { |
| int m; |
| struct list_head *plist_head; |
| struct data_urb *pdata_urb; |
| |
| if ((struct easycap *)NULL == peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| if (peasycap->video_isoc_streaming) { |
| |
| |
| |
| if ((struct list_head *)NULL != peasycap->purb_video_head) { |
| peasycap->video_isoc_streaming = 0; |
| JOT(4, "killing video urbs\n"); |
| m = 0; |
| list_for_each(plist_head, (peasycap->purb_video_head)) { |
| pdata_urb = list_entry(plist_head, struct data_urb, \ |
| list_head); |
| if ((struct data_urb *)NULL != pdata_urb) { |
| if ((struct urb *)NULL != pdata_urb->purb) { |
| usb_kill_urb(pdata_urb->purb); |
| m++; |
| } |
| } |
| } |
| JOT(4, "%i video urbs killed\n", m); |
| } else { |
| SAY("ERROR: peasycap->purb_video_head is NULL\n"); |
| return -EFAULT; |
| } |
| } else { |
| JOT(8, "%i=video_isoc_streaming, no video urbs killed\n", \ |
| peasycap->video_isoc_streaming); |
| } |
| return 0; |
| } |
| /****************************************************************************/ |
| /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/ |
| #if defined(EASYCAP_IS_VIDEODEV_CLIENT) |
| int |
| easycap_release_noinode(struct file *file) |
| { |
| return easycap_release((struct inode *)NULL, file); |
| } |
| #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/ |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| /*--------------------------------------------------------------------------*/ |
| int |
| easycap_release(struct inode *inode, struct file *file) |
| { |
| #if (!defined(EASYCAP_IS_VIDEODEV_CLIENT)) |
| struct easycap *peasycap; |
| |
| JOT(4, "\n"); |
| |
| peasycap = file->private_data; |
| if (NULL == peasycap) { |
| SAY("ERROR: peasycap is NULL.\n"); |
| SAY("ending unsuccessfully\n"); |
| return -EFAULT; |
| } |
| if (0 != kill_video_urbs(peasycap)) { |
| SAY("ERROR: kill_video_urbs() failed\n"); |
| return -EFAULT; |
| } |
| JOT(4, "ending successfully\n"); |
| /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/ |
| #else |
| # |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/ |
| |
| return 0; |
| } |
| /****************************************************************************/ |
| /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/ |
| #if defined(EASYCAP_IS_VIDEODEV_CLIENT) |
| int |
| videodev_release(struct video_device *pvd) |
| { |
| struct easycap *peasycap; |
| int i, j, k; |
| |
| JOT(4, "\n"); |
| |
| k = 0; |
| for (i = 0; i < video_device_many; i++) { |
| pvideo_device = pvideo_array[i]; |
| if ((struct video_device *)NULL != pvideo_device) { |
| if (pvd->minor == pvideo_device->minor) { |
| peasycap = (struct easycap *)\ |
| video_get_drvdata(pvideo_device); |
| if ((struct easycap *)NULL == peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| SAY("ending unsuccessfully\n"); |
| return -EFAULT; |
| } |
| if (0 != kill_video_urbs(peasycap)) { |
| SAY("ERROR: kill_video_urbs() failed\n"); |
| return -EFAULT; |
| } |
| JOT(4, "freeing video_device structure: " \ |
| "/dev/video%i\n", i); |
| kfree((void *)pvideo_device); |
| for (j = i; j < (VIDEO_DEVICE_MANY - 1); j++) |
| pvideo_array[j] = pvideo_array[j + 1]; |
| video_device_many--; k++; |
| break; |
| } |
| } |
| } |
| if (!k) { |
| SAY("ERROR: lost video_device structure for %i=minor\n", pvd->minor); |
| SAY("cannot free: may cause memory leak\n"); |
| SAY("ending unsuccessfully\n"); |
| return -EFAULT; |
| } |
| |
| JOT(4, "ending successfully\n"); |
| return 0; |
| } |
| #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/ |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| /****************************************************************************/ |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * THIS FUNCTION IS CALLED FROM WITHIN easycap_usb_disconnect(). |
| * BY THIS STAGE THE DEVICE HAS ALREADY BEEN PHYSICALLY UNPLUGGED. |
| * peasycap->pusb_device IS NO LONGER VALID AND SHOULD HAVE BEEN SET TO NULL. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| void |
| easycap_delete(struct kref *pkref) |
| { |
| int k, m, lost; |
| int allocation_video_urb, allocation_video_page, allocation_video_struct; |
| int allocation_audio_urb, allocation_audio_page, allocation_audio_struct; |
| int registered_video, registered_audio; |
| struct easycap *peasycap; |
| struct data_urb *pdata_urb; |
| struct list_head *plist_head, *plist_next; |
| |
| JOT(4, "\n"); |
| |
| peasycap = container_of(pkref, struct easycap, kref); |
| if ((struct easycap *)NULL == peasycap) { |
| SAY("ERROR: peasycap is NULL: cannot perform deletions\n"); |
| return; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * FREE VIDEO. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if ((struct list_head *)NULL != peasycap->purb_video_head) { |
| JOT(4, "freeing video urbs\n"); |
| m = 0; |
| list_for_each(plist_head, (peasycap->purb_video_head)) { |
| pdata_urb = list_entry(plist_head, struct data_urb, list_head); |
| if (NULL == pdata_urb) |
| JOT(4, "ERROR: pdata_urb is NULL\n"); |
| else { |
| if ((struct urb *)NULL != pdata_urb->purb) { |
| usb_free_urb(pdata_urb->purb); |
| pdata_urb->purb = (struct urb *)NULL; |
| peasycap->allocation_video_urb -= 1; |
| m++; |
| } |
| } |
| } |
| |
| JOT(4, "%i video urbs freed\n", m); |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "freeing video data_urb structures.\n"); |
| m = 0; |
| list_for_each_safe(plist_head, plist_next, peasycap->purb_video_head) { |
| pdata_urb = list_entry(plist_head, struct data_urb, list_head); |
| if ((struct data_urb *)NULL != pdata_urb) { |
| kfree(pdata_urb); pdata_urb = (struct data_urb *)NULL; |
| peasycap->allocation_video_struct -= \ |
| sizeof(struct data_urb); |
| m++; |
| } |
| } |
| JOT(4, "%i video data_urb structures freed\n", m); |
| JOT(4, "setting peasycap->purb_video_head=NULL\n"); |
| peasycap->purb_video_head = (struct list_head *)NULL; |
| } else { |
| JOT(4, "peasycap->purb_video_head is NULL\n"); |
| } |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "freeing video isoc buffers.\n"); |
| m = 0; |
| for (k = 0; k < VIDEO_ISOC_BUFFER_MANY; k++) { |
| if ((void *)NULL != peasycap->video_isoc_buffer[k].pgo) { |
| free_pages((unsigned long)\ |
| (peasycap->video_isoc_buffer[k].pgo), \ |
| VIDEO_ISOC_ORDER); |
| peasycap->video_isoc_buffer[k].pgo = (void *)NULL; |
| peasycap->allocation_video_page -= \ |
| ((unsigned int)(0x01 << VIDEO_ISOC_ORDER)); |
| m++; |
| } |
| } |
| JOT(4, "isoc video buffers freed: %i pages\n", m * (0x01 << VIDEO_ISOC_ORDER)); |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "freeing video field buffers.\n"); |
| lost = 0; |
| for (k = 0; k < FIELD_BUFFER_MANY; k++) { |
| for (m = 0; m < FIELD_BUFFER_SIZE/PAGE_SIZE; m++) { |
| if ((void *)NULL != peasycap->field_buffer[k][m].pgo) { |
| free_page((unsigned long)\ |
| (peasycap->field_buffer[k][m].pgo)); |
| peasycap->field_buffer[k][m].pgo = (void *)NULL; |
| peasycap->allocation_video_page -= 1; |
| lost++; |
| } |
| } |
| } |
| JOT(4, "video field buffers freed: %i pages\n", lost); |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "freeing video frame buffers.\n"); |
| lost = 0; |
| for (k = 0; k < FRAME_BUFFER_MANY; k++) { |
| for (m = 0; m < FRAME_BUFFER_SIZE/PAGE_SIZE; m++) { |
| if ((void *)NULL != peasycap->frame_buffer[k][m].pgo) { |
| free_page((unsigned long)\ |
| (peasycap->frame_buffer[k][m].pgo)); |
| peasycap->frame_buffer[k][m].pgo = (void *)NULL; |
| peasycap->allocation_video_page -= 1; |
| lost++; |
| } |
| } |
| } |
| JOT(4, "video frame buffers freed: %i pages\n", lost); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * FREE AUDIO. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if ((struct list_head *)NULL != peasycap->purb_audio_head) { |
| JOT(4, "freeing audio urbs\n"); |
| m = 0; |
| list_for_each(plist_head, (peasycap->purb_audio_head)) { |
| pdata_urb = list_entry(plist_head, struct data_urb, list_head); |
| if (NULL == pdata_urb) |
| JOT(4, "ERROR: pdata_urb is NULL\n"); |
| else { |
| if ((struct urb *)NULL != pdata_urb->purb) { |
| usb_free_urb(pdata_urb->purb); |
| pdata_urb->purb = (struct urb *)NULL; |
| peasycap->allocation_audio_urb -= 1; |
| m++; |
| } |
| } |
| } |
| JOT(4, "%i audio urbs freed\n", m); |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "freeing audio data_urb structures.\n"); |
| m = 0; |
| list_for_each_safe(plist_head, plist_next, peasycap->purb_audio_head) { |
| pdata_urb = list_entry(plist_head, struct data_urb, list_head); |
| if ((struct data_urb *)NULL != pdata_urb) { |
| kfree(pdata_urb); pdata_urb = (struct data_urb *)NULL; |
| peasycap->allocation_audio_struct -= \ |
| sizeof(struct data_urb); |
| m++; |
| } |
| } |
| JOT(4, "%i audio data_urb structures freed\n", m); |
| JOT(4, "setting peasycap->purb_audio_head=NULL\n"); |
| peasycap->purb_audio_head = (struct list_head *)NULL; |
| } else { |
| JOT(4, "peasycap->purb_audio_head is NULL\n"); |
| } |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "freeing audio isoc buffers.\n"); |
| m = 0; |
| for (k = 0; k < AUDIO_ISOC_BUFFER_MANY; k++) { |
| if ((void *)NULL != peasycap->audio_isoc_buffer[k].pgo) { |
| free_pages((unsigned long)\ |
| (peasycap->audio_isoc_buffer[k].pgo), \ |
| AUDIO_ISOC_ORDER); |
| peasycap->audio_isoc_buffer[k].pgo = (void *)NULL; |
| peasycap->allocation_audio_page -= \ |
| ((unsigned int)(0x01 << AUDIO_ISOC_ORDER)); |
| m++; |
| } |
| } |
| JOT(4, "easysnd_delete(): isoc audio buffers freed: %i pages\n", \ |
| m * (0x01 << AUDIO_ISOC_ORDER)); |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "freeing audio buffers.\n"); |
| lost = 0; |
| for (k = 0; k < peasycap->audio_buffer_page_many; k++) { |
| if ((void *)NULL != peasycap->audio_buffer[k].pgo) { |
| free_page((unsigned long)(peasycap->audio_buffer[k].pgo)); |
| peasycap->audio_buffer[k].pgo = (void *)NULL; |
| peasycap->allocation_audio_page -= 1; |
| lost++; |
| } |
| } |
| JOT(4, "easysnd_delete(): audio buffers freed: %i pages\n", lost); |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "freeing easycap structure.\n"); |
| allocation_video_urb = peasycap->allocation_video_urb; |
| allocation_video_page = peasycap->allocation_video_page; |
| allocation_video_struct = peasycap->allocation_video_struct; |
| registered_video = peasycap->registered_video; |
| allocation_audio_urb = peasycap->allocation_audio_urb; |
| allocation_audio_page = peasycap->allocation_audio_page; |
| allocation_audio_struct = peasycap->allocation_audio_struct; |
| registered_audio = peasycap->registered_audio; |
| m = 0; |
| if ((struct easycap *)NULL != peasycap) { |
| kfree(peasycap); peasycap = (struct easycap *)NULL; |
| allocation_video_struct -= sizeof(struct easycap); |
| m++; |
| } |
| JOT(4, "%i easycap structure freed\n", m); |
| /*---------------------------------------------------------------------------*/ |
| |
| SAY("%8i= video urbs after all deletions\n", allocation_video_urb); |
| SAY("%8i= video pages after all deletions\n", allocation_video_page); |
| SAY("%8i= video structs after all deletions\n", allocation_video_struct); |
| SAY("%8i= video devices after all deletions\n", registered_video); |
| SAY("%8i= audio urbs after all deletions\n", allocation_audio_urb); |
| SAY("%8i= audio pages after all deletions\n", allocation_audio_page); |
| SAY("%8i= audio structs after all deletions\n", allocation_audio_struct); |
| SAY("%8i= audio devices after all deletions\n", registered_audio); |
| |
| JOT(4, "ending.\n"); |
| return; |
| } |
| /*****************************************************************************/ |
| unsigned int easycap_poll(struct file *file, poll_table *wait) |
| { |
| struct easycap *peasycap; |
| |
| JOT(8, "\n"); |
| |
| if (NULL == ((poll_table *)wait)) |
| JOT(8, "WARNING: poll table pointer is NULL ... continuing\n"); |
| if (NULL == ((struct file *)file)) { |
| SAY("ERROR: file pointer is NULL\n"); |
| return -EFAULT; |
| } |
| peasycap = file->private_data; |
| if (NULL == peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| peasycap->polled = 1; |
| |
| if (0 == easycap_dqbuf(peasycap, 0)) |
| return POLLIN | POLLRDNORM; |
| else |
| return POLLERR; |
| |
| } |
| /*****************************************************************************/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * IF mode IS NONZERO THIS ROUTINE RETURNS -EAGAIN RATHER THAN BLOCKING. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| int |
| easycap_dqbuf(struct easycap *peasycap, int mode) |
| { |
| int miss, rc; |
| |
| JOT(8, "\n"); |
| |
| if (NULL == peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * WAIT FOR FIELD 0 |
| */ |
| /*---------------------------------------------------------------------------*/ |
| miss = 0; |
| if (mutex_lock_interruptible(&(peasycap->mutex_mmap_video[0]))) |
| return -ERESTARTSYS; |
| while ((peasycap->field_read == peasycap->field_fill) || \ |
| (0 != (0xFF00 & peasycap->field_buffer\ |
| [peasycap->field_read][0].kount)) || \ |
| (0 != (0x00FF & peasycap->field_buffer\ |
| [peasycap->field_read][0].kount))) { |
| mutex_unlock(&(peasycap->mutex_mmap_video[0])); |
| |
| if (mode) |
| return -EAGAIN; |
| |
| JOT(8, "first wait on wq_video, " \ |
| "%i=field_read %i=field_fill\n", \ |
| peasycap->field_read, peasycap->field_fill); |
| |
| msleep(1); |
| if (0 != (wait_event_interruptible(peasycap->wq_video, \ |
| (peasycap->video_idle || peasycap->video_eof || \ |
| ((peasycap->field_read != peasycap->field_fill) && \ |
| (0 == (0xFF00 & peasycap->field_buffer\ |
| [peasycap->field_read][0].kount)) && \ |
| (0 == (0x00FF & peasycap->field_buffer\ |
| [peasycap->field_read][0].kount))))))){ |
| SAY("aborted by signal\n"); |
| return -EIO; |
| } |
| if (peasycap->video_idle) { |
| JOT(8, "%i=peasycap->video_idle\n", peasycap->video_idle); |
| return -EIO; |
| } |
| if (peasycap->video_eof) { |
| JOT(8, "%i=peasycap->video_eof\n", peasycap->video_eof); |
| debrief(peasycap); |
| kill_video_urbs(peasycap); |
| return -EIO; |
| } |
| miss++; |
| if (mutex_lock_interruptible(&(peasycap->mutex_mmap_video[0]))) |
| return -ERESTARTSYS; |
| } |
| mutex_unlock(&(peasycap->mutex_mmap_video[0])); |
| JOT(8, "first awakening on wq_video after %i waits\n", miss); |
| |
| rc = field2frame(peasycap); |
| if (0 != rc) |
| SAY("ERROR: field2frame() returned %i\n", rc); |
| |
| if (true == peasycap->offerfields) { |
| peasycap->frame_read = peasycap->frame_fill; |
| (peasycap->frame_fill)++; |
| if (peasycap->frame_buffer_many <= peasycap->frame_fill) |
| peasycap->frame_fill = 0; |
| |
| if (0x01 & easycap_standard[peasycap->standard_offset].mask) { |
| peasycap->frame_buffer[peasycap->frame_read][0].kount = \ |
| V4L2_FIELD_BOTTOM; |
| } else { |
| peasycap->frame_buffer[peasycap->frame_read][0].kount = \ |
| V4L2_FIELD_TOP; |
| } |
| JOT(8, "setting: %i=peasycap->frame_read\n", peasycap->frame_read); |
| JOT(8, "bumped to: %i=peasycap->frame_fill\n", peasycap->frame_fill); |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * WAIT FOR FIELD 1 |
| */ |
| /*---------------------------------------------------------------------------*/ |
| miss = 0; |
| if (mutex_lock_interruptible(&(peasycap->mutex_mmap_video[0]))) |
| return -ERESTARTSYS; |
| while ((peasycap->field_read == peasycap->field_fill) || \ |
| (0 != (0xFF00 & peasycap->field_buffer\ |
| [peasycap->field_read][0].kount)) || \ |
| (0 == (0x00FF & peasycap->field_buffer\ |
| [peasycap->field_read][0].kount))) { |
| mutex_unlock(&(peasycap->mutex_mmap_video[0])); |
| |
| if (mode) |
| return -EAGAIN; |
| |
| JOT(8, "second wait on wq_video, " \ |
| "%i=field_read %i=field_fill\n", \ |
| peasycap->field_read, peasycap->field_fill); |
| msleep(1); |
| if (0 != (wait_event_interruptible(peasycap->wq_video, \ |
| (peasycap->video_idle || peasycap->video_eof || \ |
| ((peasycap->field_read != peasycap->field_fill) && \ |
| (0 == (0xFF00 & peasycap->field_buffer\ |
| [peasycap->field_read][0].kount)) && \ |
| (0 != (0x00FF & peasycap->field_buffer\ |
| [peasycap->field_read][0].kount))))))){ |
| SAY("aborted by signal\n"); |
| return -EIO; |
| } |
| if (peasycap->video_idle) { |
| JOT(8, "%i=peasycap->video_idle\n", peasycap->video_idle); |
| return -EIO; |
| } |
| if (peasycap->video_eof) { |
| JOT(8, "%i=peasycap->video_eof\n", peasycap->video_eof); |
| debrief(peasycap); |
| kill_video_urbs(peasycap); |
| return -EIO; |
| } |
| miss++; |
| if (mutex_lock_interruptible(&(peasycap->mutex_mmap_video[0]))) |
| return -ERESTARTSYS; |
| } |
| mutex_unlock(&(peasycap->mutex_mmap_video[0])); |
| JOT(8, "second awakening on wq_video after %i waits\n", miss); |
| |
| rc = field2frame(peasycap); |
| if (0 != rc) |
| SAY("ERROR: field2frame() returned %i\n", rc); |
| |
| peasycap->frame_read = peasycap->frame_fill; |
| peasycap->queued[peasycap->frame_read] = 0; |
| peasycap->done[peasycap->frame_read] = V4L2_BUF_FLAG_DONE; |
| |
| (peasycap->frame_fill)++; |
| if (peasycap->frame_buffer_many <= peasycap->frame_fill) |
| peasycap->frame_fill = 0; |
| |
| if (0x01 & easycap_standard[peasycap->standard_offset].mask) { |
| peasycap->frame_buffer[peasycap->frame_read][0].kount = \ |
| V4L2_FIELD_TOP; |
| } else { |
| peasycap->frame_buffer[peasycap->frame_read][0].kount = \ |
| V4L2_FIELD_BOTTOM; |
| } |
| |
| JOT(8, "setting: %i=peasycap->frame_read\n", peasycap->frame_read); |
| JOT(8, "bumped to: %i=peasycap->frame_fill\n", peasycap->frame_fill); |
| |
| return 0; |
| } |
| /*****************************************************************************/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * BY DEFINITION, odd IS true FOR THE FIELD OCCUPYING LINES 1,3,5,...,479 |
| * odd IS false FOR THE FIELD OCCUPYING LINES 0,2,4,...,478 |
| * |
| * WHEN BOOLEAN PARAMETER decimatepixel IS true, ONLY THE FIELD FOR WHICH |
| * odd==false IS TRANSFERRED TO THE FRAME BUFFER. |
| * |
| * THE BOOLEAN PARAMETER offerfields IS true ONLY WHEN THE USER PROGRAM |
| * CHOOSES THE OPTION V4L2_FIELD_ALTERNATE. NO USERSPACE PROGRAM TESTED |
| * TO DATE HAS DONE THIS. BUGS ARE LIKELY. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| int |
| field2frame(struct easycap *peasycap) |
| { |
| static struct timeval timeval0; |
| struct timeval timeval; |
| long long int above, below; |
| __u32 remainder; |
| struct signed_div_result sdr; |
| |
| void *pex, *pad; |
| int kex, kad, mex, mad, rex, rad, rad2; |
| int c2, c3, w2, w3, cz, wz; |
| int rc, bytesperpixel, multiplier, much, more, over, rump, caches; |
| __u8 mask, margin; |
| bool odd, isuy, decimatepixel, offerfields; |
| |
| JOT(8, "===== parity %i, field buffer %i --> frame buffer %i\n", \ |
| peasycap->field_buffer[peasycap->field_read][0].kount,\ |
| peasycap->field_read, peasycap->frame_fill); |
| JOT(8, "===== %i=bytesperpixel\n", peasycap->bytesperpixel); |
| if (true == peasycap->offerfields) |
| JOT(8, "===== offerfields\n"); |
| |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * REJECT OR CLEAN BAD FIELDS |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (peasycap->field_read == peasycap->field_fill) { |
| SAY("ERROR: on entry, still filling field buffer %i\n", \ |
| peasycap->field_read); |
| return 0; |
| } |
| #if defined(EASYCAP_TESTCARD) |
| easycap_testcard(peasycap, peasycap->field_read); |
| #else |
| if (0 != (0x0400 & peasycap->field_buffer[peasycap->field_read][0].kount)) |
| easycap_testcard(peasycap, peasycap->field_read); |
| #endif /*EASYCAP_TESTCARD*/ |
| /*---------------------------------------------------------------------------*/ |
| |
| offerfields = peasycap->offerfields; |
| bytesperpixel = peasycap->bytesperpixel; |
| decimatepixel = peasycap->decimatepixel; |
| |
| if ((2 != bytesperpixel) && \ |
| (3 != bytesperpixel) && \ |
| (4 != bytesperpixel)) { |
| SAY("MISTAKE: %i=bytesperpixel\n", bytesperpixel); |
| return -EFAULT; |
| } |
| if (true == decimatepixel) |
| multiplier = 2; |
| else |
| multiplier = 1; |
| |
| w2 = 2 * multiplier * (peasycap->width); |
| w3 = bytesperpixel * \ |
| multiplier * \ |
| (peasycap->width); |
| wz = multiplier * \ |
| (peasycap->height) * \ |
| multiplier * \ |
| (peasycap->width); |
| |
| kex = peasycap->field_read; mex = 0; |
| kad = peasycap->frame_fill; mad = 0; |
| |
| pex = peasycap->field_buffer[kex][0].pgo; rex = PAGE_SIZE; |
| pad = peasycap->frame_buffer[kad][0].pgo; rad = PAGE_SIZE; |
| if (peasycap->field_buffer[kex][0].kount) |
| odd = true; |
| else |
| odd = false; |
| |
| if ((true == odd) && (false == offerfields) &&(false == decimatepixel)) { |
| JOT(8, " initial skipping %4i bytes p.%4i\n", \ |
| w3/multiplier, mad); |
| pad += (w3 / multiplier); rad -= (w3 / multiplier); |
| } |
| isuy = true; |
| mask = 0; rump = 0; caches = 0; |
| |
| cz = 0; |
| while (cz < wz) { |
| /*-------------------------------------------------------------------*/ |
| /* |
| ** PROCESS ONE LINE OF FRAME AT FULL RESOLUTION: |
| ** READ w2 BYTES FROM FIELD BUFFER, |
| ** WRITE w3 BYTES TO FRAME BUFFER |
| **/ |
| /*-------------------------------------------------------------------*/ |
| if (false == decimatepixel) { |
| over = w2; |
| do { |
| much = over; more = 0; margin = 0; mask = 0x00; |
| if (rex < much) |
| much = rex; |
| rump = 0; |
| |
| if (much % 2) { |
| SAY("MISTAKE: much is odd\n"); |
| return -EFAULT; |
| } |
| |
| more = (bytesperpixel * \ |
| much) / 2; |
| /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
| if (1 < bytesperpixel) { |
| if ((rad * \ |
| 2) < (much * \ |
| bytesperpixel)) { |
| /* |
| ** INJUDICIOUS ALTERATION OF THIS |
| ** BLOCK WILL CAUSE BREAKAGE. |
| ** BEWARE. |
| **/ |
| rad2 = rad + bytesperpixel - 1; |
| much = ((((2 * \ |
| rad2)/bytesperpixel)/2) * 2); |
| rump = ((bytesperpixel * \ |
| much) / 2) - rad; |
| more = rad; |
| } |
| mask = (__u8)rump; |
| margin = 0; |
| if (much == rex) { |
| mask |= 0x04; |
| if ((mex + 1) < FIELD_BUFFER_SIZE/ \ |
| PAGE_SIZE) { |
| margin = *((__u8 *)(peasycap->\ |
| field_buffer\ |
| [kex][mex + 1].pgo)); |
| } else |
| mask |= 0x08; |
| } |
| /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
| } else { |
| SAY("MISTAKE: %i=bytesperpixel\n", \ |
| bytesperpixel); |
| return -EFAULT; |
| } |
| /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
| if (rump) |
| caches++; |
| |
| rc = redaub(peasycap, pad, pex, much, more, \ |
| mask, margin, isuy); |
| if (0 > rc) { |
| SAY("ERROR: redaub() failed\n"); |
| return -EFAULT; |
| } |
| if (much % 4) { |
| if (isuy) |
| isuy = false; |
| else |
| isuy = true; |
| } |
| over -= much; cz += much; |
| pex += much; rex -= much; |
| if (!rex) { |
| mex++; |
| pex = peasycap->field_buffer[kex][mex].pgo; |
| rex = PAGE_SIZE; |
| } |
| pad += more; |
| rad -= more; |
| if (!rad) { |
| mad++; |
| pad = peasycap->frame_buffer[kad][mad].pgo; |
| rad = PAGE_SIZE; |
| if (rump) { |
| pad += rump; |
| rad -= rump; |
| } |
| } |
| } while (over); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * SKIP w3 BYTES IN TARGET FRAME BUFFER, |
| * UNLESS IT IS THE LAST LINE OF AN ODD FRAME |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (((false == odd) || (cz != wz))&&(false == offerfields)) { |
| over = w3; |
| do { |
| if (!rad) { |
| mad++; |
| pad = peasycap->frame_buffer\ |
| [kad][mad].pgo; |
| rad = PAGE_SIZE; |
| } |
| more = over; |
| if (rad < more) |
| more = rad; |
| over -= more; |
| pad += more; |
| rad -= more; |
| } while (over); |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * PROCESS ONE LINE OF FRAME AT REDUCED RESOLUTION: |
| * ONLY IF false==odd, |
| * READ w2 BYTES FROM FIELD BUFFER, |
| * WRITE w3 / 2 BYTES TO FRAME BUFFER |
| */ |
| /*---------------------------------------------------------------------------*/ |
| } else if (false == odd) { |
| over = w2; |
| do { |
| much = over; more = 0; margin = 0; mask = 0x00; |
| if (rex < much) |
| much = rex; |
| rump = 0; |
| |
| if (much % 2) { |
| SAY("MISTAKE: much is odd\n"); |
| return -EFAULT; |
| } |
| |
| more = (bytesperpixel * \ |
| much) / 4; |
| /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
| if (1 < bytesperpixel) { |
| if ((rad * 4) < (much * \ |
| bytesperpixel)) { |
| /* |
| ** INJUDICIOUS ALTERATION OF THIS |
| ** BLOCK WILL CAUSE BREAKAGE. |
| ** BEWARE. |
| **/ |
| rad2 = rad + bytesperpixel - 1; |
| much = ((((2 * rad2)/bytesperpixel)/2)\ |
| * 4); |
| rump = ((bytesperpixel * \ |
| much) / 4) - rad; |
| more = rad; |
| } |
| mask = (__u8)rump; |
| margin = 0; |
| if (much == rex) { |
| mask |= 0x04; |
| if ((mex + 1) < FIELD_BUFFER_SIZE/ \ |
| PAGE_SIZE) { |
| margin = *((__u8 *)(peasycap->\ |
| field_buffer\ |
| [kex][mex + 1].pgo)); |
| } |
| else |
| mask |= 0x08; |
| } |
| /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
| } else { |
| SAY("MISTAKE: %i=bytesperpixel\n", \ |
| bytesperpixel); |
| return -EFAULT; |
| } |
| /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
| if (rump) |
| caches++; |
| |
| rc = redaub(peasycap, pad, pex, much, more, \ |
| mask, margin, isuy); |
| if (0 > rc) { |
| SAY("ERROR: redaub() failed\n"); |
| return -EFAULT; |
| } |
| over -= much; cz += much; |
| pex += much; rex -= much; |
| if (!rex) { |
| mex++; |
| pex = peasycap->field_buffer[kex][mex].pgo; |
| rex = PAGE_SIZE; |
| } |
| pad += more; |
| rad -= more; |
| if (!rad) { |
| mad++; |
| pad = peasycap->frame_buffer[kad][mad].pgo; |
| rad = PAGE_SIZE; |
| if (rump) { |
| pad += rump; |
| rad -= rump; |
| } |
| } |
| } while (over); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * OTHERWISE JUST |
| * READ w2 BYTES FROM FIELD BUFFER AND DISCARD THEM |
| */ |
| /*---------------------------------------------------------------------------*/ |
| } else { |
| over = w2; |
| do { |
| if (!rex) { |
| mex++; |
| pex = peasycap->field_buffer[kex][mex].pgo; |
| rex = PAGE_SIZE; |
| } |
| much = over; |
| if (rex < much) |
| much = rex; |
| over -= much; |
| cz += much; |
| pex += much; |
| rex -= much; |
| } while (over); |
| } |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * SANITY CHECKS |
| */ |
| /*---------------------------------------------------------------------------*/ |
| c2 = (mex + 1)*PAGE_SIZE - rex; |
| if (cz != c2) |
| SAY("ERROR: discrepancy %i in bytes read\n", c2 - cz); |
| c3 = (mad + 1)*PAGE_SIZE - rad; |
| |
| if (false == decimatepixel) { |
| if (bytesperpixel * \ |
| cz != c3) \ |
| SAY("ERROR: discrepancy %i in bytes written\n", \ |
| c3 - (bytesperpixel * \ |
| cz)); |
| } else { |
| if (false == odd) { |
| if (bytesperpixel * \ |
| cz != (4 * c3)) |
| SAY("ERROR: discrepancy %i in bytes written\n", \ |
| (2*c3)-(bytesperpixel * \ |
| cz)); |
| } else { |
| if (0 != c3) |
| SAY("ERROR: discrepancy %i " \ |
| "in bytes written\n", c3); |
| } |
| } |
| if (rump) |
| SAY("ERROR: undischarged cache at end of line in frame buffer\n"); |
| |
| JOT(8, "===== field2frame(): %i bytes --> %i bytes (incl skip)\n", c2, c3); |
| JOT(8, "===== field2frame(): %i=mad %i=rad\n", mad, rad); |
| |
| if (true == odd) |
| JOT(8, "+++++ field2frame(): frame buffer %i is full\n", kad); |
| |
| if (peasycap->field_read == peasycap->field_fill) |
| SAY("WARNING: on exit, filling field buffer %i\n", \ |
| peasycap->field_read); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * CALCULATE VIDEO STREAMING RATE |
| */ |
| /*---------------------------------------------------------------------------*/ |
| do_gettimeofday(&timeval); |
| if (timeval0.tv_sec) { |
| below = ((long long int)(1000000)) * \ |
| ((long long int)(timeval.tv_sec - timeval0.tv_sec)) + \ |
| (long long int)(timeval.tv_usec - timeval0.tv_usec); |
| above = (long long int)1000000; |
| |
| sdr = signed_div(above, below); |
| above = sdr.quotient; |
| remainder = (__u32)sdr.remainder; |
| |
| JOT(8, "video streaming at %3lli.%03i fields per second\n", above, \ |
| (remainder/1000)); |
| } |
| timeval0 = timeval; |
| |
| if (caches) |
| JOT(8, "%i=caches\n", caches); |
| return 0; |
| } |
| /*****************************************************************************/ |
| struct signed_div_result |
| signed_div(long long int above, long long int below) |
| { |
| struct signed_div_result sdr; |
| |
| if (((0 <= above) && (0 <= below)) || ((0 > above) && (0 > below))) { |
| sdr.remainder = (unsigned long long int) do_div(above, below); |
| sdr.quotient = (long long int) above; |
| } else { |
| if (0 > above) |
| above = -above; |
| if (0 > below) |
| below = -below; |
| sdr.remainder = (unsigned long long int) do_div(above, below); |
| sdr.quotient = -((long long int) above); |
| } |
| return sdr; |
| } |
| /*****************************************************************************/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * DECIMATION AND COLOURSPACE CONVERSION. |
| * |
| * THIS ROUTINE REQUIRES THAT ALL THE DATA TO BE READ RESIDES ON ONE PAGE |
| * AND THAT ALL THE DATA TO BE WRITTEN RESIDES ON ONE (DIFFERENT) PAGE. |
| * THE CALLING ROUTINE MUST ENSURE THAT THIS REQUIREMENT IS MET, AND MUST |
| * ALSO ENSURE THAT much IS EVEN. |
| * |
| * much BYTES ARE READ, AT LEAST (bytesperpixel * much)/2 BYTES ARE WRITTEN |
| * IF THERE IS NO DECIMATION, HALF THIS AMOUNT IF THERE IS DECIMATION. |
| * |
| * mask IS ZERO WHEN NO SPECIAL BEHAVIOUR REQUIRED. OTHERWISE IT IS SET THUS: |
| * 0x03 & mask = number of bytes to be written to cache instead of to |
| * frame buffer |
| * 0x04 & mask => use argument margin to set the chrominance for last pixel |
| * 0x08 & mask => do not set the chrominance for last pixel |
| * |
| * YUV to RGB CONVERSION IS (OR SHOULD BE) ITU-R BT 601. |
| * |
| * THERE IS A LOT OF CODE REPETITION IN THIS ROUTINE IN ORDER TO AVOID |
| * INEFFICIENT SWITCHING INSIDE INNER LOOPS. REARRANGING THE LOGIC TO |
| * REDUCE CODE LENGTH WILL GENERALLY IMPAIR RUNTIME PERFORMANCE. BEWARE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| int |
| redaub(struct easycap *peasycap, void *pad, void *pex, int much, int more, \ |
| __u8 mask, __u8 margin, bool isuy) |
| { |
| static __s32 ay[256], bu[256], rv[256], gu[256], gv[256]; |
| static __u8 cache[8], *pcache; |
| __u8 r, g, b, y, u, v, c, *p2, *p3, *pz, *pr; |
| int bytesperpixel; |
| bool byteswaporder, decimatepixel, last; |
| int j, rump; |
| __s32 s32; |
| |
| if (much % 2) { |
| SAY("MISTAKE: much is odd\n"); |
| return -EFAULT; |
| } |
| bytesperpixel = peasycap->bytesperpixel; |
| byteswaporder = peasycap->byteswaporder; |
| decimatepixel = peasycap->decimatepixel; |
| |
| /*---------------------------------------------------------------------------*/ |
| if (!bu[255]) { |
| for (j = 0; j < 112; j++) { |
| s32 = (0xFF00 & (453 * j)) >> 8; |
| bu[j + 128] = s32; bu[127 - j] = -s32; |
| s32 = (0xFF00 & (359 * j)) >> 8; |
| rv[j + 128] = s32; rv[127 - j] = -s32; |
| s32 = (0xFF00 & (88 * j)) >> 8; |
| gu[j + 128] = s32; gu[127 - j] = -s32; |
| s32 = (0xFF00 & (183 * j)) >> 8; |
| gv[j + 128] = s32; gv[127 - j] = -s32; |
| } |
| for (j = 0; j < 16; j++) { |
| bu[j] = bu[16]; rv[j] = rv[16]; |
| gu[j] = gu[16]; gv[j] = gv[16]; |
| } |
| for (j = 240; j < 256; j++) { |
| bu[j] = bu[239]; rv[j] = rv[239]; |
| gu[j] = gu[239]; gv[j] = gv[239]; |
| } |
| for (j = 16; j < 236; j++) |
| ay[j] = j; |
| for (j = 0; j < 16; j++) |
| ay[j] = ay[16]; |
| for (j = 236; j < 256; j++) |
| ay[j] = ay[235]; |
| JOT(8, "lookup tables are prepared\n"); |
| } |
| if ((__u8 *)NULL == pcache) |
| pcache = &cache[0]; |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * TRANSFER CONTENTS OF CACHE TO THE FRAME BUFFER |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (!pcache) { |
| SAY("MISTAKE: pcache is NULL\n"); |
| return -EFAULT; |
| } |
| |
| if (pcache != &cache[0]) |
| JOT(16, "cache has %i bytes\n", (int)(pcache - &cache[0])); |
| p2 = &cache[0]; |
| p3 = (__u8 *)pad - (int)(pcache - &cache[0]); |
| while (p2 < pcache) { |
| *p3++ = *p2; p2++; |
| } |
| pcache = &cache[0]; |
| if (p3 != pad) { |
| SAY("MISTAKE: pointer misalignment\n"); |
| return -EFAULT; |
| } |
| /*---------------------------------------------------------------------------*/ |
| rump = (int)(0x03 & mask); |
| u = 0; v = 0; |
| p2 = (__u8 *)pex; pz = p2 + much; pr = p3 + more; last = false; |
| p2++; |
| |
| if (true == isuy) |
| u = *(p2 - 1); |
| else |
| v = *(p2 - 1); |
| |
| if (rump) |
| JOT(16, "%4i=much %4i=more %i=rump\n", much, more, rump); |
| |
| /*---------------------------------------------------------------------------*/ |
| switch (bytesperpixel) { |
| case 2: { |
| if (false == decimatepixel) { |
| memcpy(pad, pex, (size_t)much); |
| if (false == byteswaporder) |
| /*---------------------------------------------------*/ |
| /* |
| ** UYVY |
| */ |
| /*---------------------------------------------------*/ |
| return 0; |
| else { |
| /*---------------------------------------------------*/ |
| /* |
| ** YUYV |
| */ |
| /*---------------------------------------------------*/ |
| p3 = (__u8 *)pad; pz = p3 + much; |
| while (pz > p3) { |
| c = *p3; |
| *p3 = *(p3 + 1); |
| *(p3 + 1) = c; |
| p3 += 2; |
| } |
| return 0; |
| } |
| } else { |
| if (false == byteswaporder) { |
| /*---------------------------------------------------*/ |
| /* |
| ** UYVY DECIMATED |
| */ |
| /*---------------------------------------------------*/ |
| p2 = (__u8 *)pex; p3 = (__u8 *)pad; pz = p2 + much; |
| while (pz > p2) { |
| *p3 = *p2; |
| *(p3 + 1) = *(p2 + 1); |
| *(p3 + 2) = *(p2 + 2); |
| *(p3 + 3) = *(p2 + 3); |
| p3 += 4; p2 += 8; |
| } |
| return 0; |
| } else { |
| /*---------------------------------------------------*/ |
| /* |
| ** YUYV DECIMATED |
| **/ |
| /*---------------------------------------------------*/ |
| p2 = (__u8 *)pex; p3 = (__u8 *)pad; pz = p2 + much; |
| while (pz > p2) { |
| *p3 = *(p2 + 1); |
| *(p3 + 1) = *p2; |
| *(p3 + 2) = *(p2 + 3); |
| *(p3 + 3) = *(p2 + 2); |
| p3 += 4; p2 += 8; |
| } |
| return 0; |
| } |
| } |
| break; |
| } |
| case 3: |
| { |
| if (false == decimatepixel) { |
| if (false == byteswaporder) { |
| /*---------------------------------------------------*/ |
| /* |
| ** RGB |
| **/ |
| /*---------------------------------------------------*/ |
| while (pz > p2) { |
| if (pr <= (p3 + bytesperpixel)) |
| last = true; |
| else |
| last = false; |
| y = *p2; |
| if ((true == last) && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (true == isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (true == isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| s32 = ay[(int)y] + rv[(int)v]; |
| r = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] - gu[(int)u] - gv[(int)v]; |
| g = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] + bu[(int)u]; |
| b = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| |
| if ((true == last) && rump) { |
| pcache = &cache[0]; |
| switch (bytesperpixel - rump) { |
| case 1: { |
| *p3 = r; |
| *pcache++ = g; |
| *pcache++ = b; |
| break; |
| } |
| case 2: { |
| *p3 = r; |
| *(p3 + 1) = g; |
| *pcache++ = b; |
| break; |
| } |
| default: { |
| SAY("MISTAKE: %i=rump\n", \ |
| bytesperpixel - rump); |
| return -EFAULT; |
| } |
| } |
| } else { |
| *p3 = r; |
| *(p3 + 1) = g; |
| *(p3 + 2) = b; |
| } |
| p2 += 2; |
| if (true == isuy) |
| isuy = false; |
| else |
| isuy = true; |
| p3 += bytesperpixel; |
| } |
| return 0; |
| } else { |
| /*---------------------------------------------------*/ |
| /* |
| ** BGR |
| */ |
| /*---------------------------------------------------*/ |
| while (pz > p2) { |
| if (pr <= (p3 + bytesperpixel)) |
| last = true; |
| else |
| last = false; |
| y = *p2; |
| if ((true == last) && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (true == isuy) |
| v = margin; |
| else |
| u = margin; |
| } |
| else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (true == isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| s32 = ay[(int)y] + rv[(int)v]; |
| r = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] - gu[(int)u] - gv[(int)v]; |
| g = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] + bu[(int)u]; |
| b = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| |
| if ((true == last) && rump) { |
| pcache = &cache[0]; |
| switch (bytesperpixel - rump) { |
| case 1: { |
| *p3 = b; |
| *pcache++ = g; |
| *pcache++ = r; |
| break; |
| } |
| case 2: { |
| *p3 = b; |
| *(p3 + 1) = g; |
| *pcache++ = r; |
| break; |
| } |
| default: { |
| SAY("MISTAKE: %i=rump\n", \ |
| bytesperpixel - rump); |
| return -EFAULT; |
| } |
| } |
| } else { |
| *p3 = b; |
| *(p3 + 1) = g; |
| *(p3 + 2) = r; |
| } |
| p2 += 2; |
| if (true == isuy) |
| isuy = false; |
| else |
| isuy = true; |
| p3 += bytesperpixel; |
| } |
| } |
| return 0; |
| } else { |
| if (false == byteswaporder) { |
| /*---------------------------------------------------*/ |
| /* |
| ** RGB DECIMATED |
| */ |
| /*---------------------------------------------------*/ |
| while (pz > p2) { |
| if (pr <= (p3 + bytesperpixel)) |
| last = true; |
| else |
| last = false; |
| y = *p2; |
| if ((true == last) && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (true == isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (true == isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| if (true == isuy) { |
| s32 = ay[(int)y] + rv[(int)v]; |
| r = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] - gu[(int)u] - \ |
| gv[(int)v]; |
| g = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] + bu[(int)u]; |
| b = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| |
| if ((true == last) && rump) { |
| pcache = &cache[0]; |
| switch (bytesperpixel - rump) { |
| case 1: { |
| *p3 = r; |
| *pcache++ = g; |
| *pcache++ = b; |
| break; |
| } |
| case 2: { |
| *p3 = r; |
| *(p3 + 1) = g; |
| *pcache++ = b; |
| break; |
| } |
| default: { |
| SAY("MISTAKE: " \ |
| "%i=rump\n", \ |
| bytesperpixel - rump); |
| return -EFAULT; |
| } |
| } |
| } else { |
| *p3 = r; |
| *(p3 + 1) = g; |
| *(p3 + 2) = b; |
| } |
| isuy = false; |
| p3 += bytesperpixel; |
| } else { |
| isuy = true; |
| } |
| p2 += 2; |
| } |
| return 0; |
| } else { |
| /*---------------------------------------------------*/ |
| /* |
| * BGR DECIMATED |
| */ |
| /*---------------------------------------------------*/ |
| while (pz > p2) { |
| if (pr <= (p3 + bytesperpixel)) |
| last = true; |
| else |
| last = false; |
| y = *p2; |
| if ((true == last) && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (true == isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (true == isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| if (true == isuy) { |
| |
| s32 = ay[(int)y] + rv[(int)v]; |
| r = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] - gu[(int)u] - \ |
| gv[(int)v]; |
| g = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] + bu[(int)u]; |
| b = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| |
| if ((true == last) && rump) { |
| pcache = &cache[0]; |
| switch (bytesperpixel - rump) { |
| case 1: { |
| *p3 = b; |
| *pcache++ = g; |
| *pcache++ = r; |
| break; |
| } |
| case 2: { |
| *p3 = b; |
| *(p3 + 1) = g; |
| *pcache++ = r; |
| break; |
| } |
| default: { |
| SAY("MISTAKE: " \ |
| "%i=rump\n", \ |
| bytesperpixel - rump); |
| return -EFAULT; |
| } |
| } |
| } else { |
| *p3 = b; |
| *(p3 + 1) = g; |
| *(p3 + 2) = r; |
| } |
| isuy = false; |
| p3 += bytesperpixel; |
| } |
| else |
| isuy = true; |
| p2 += 2; |
| } |
| return 0; |
| } |
| } |
| break; |
| } |
| case 4: |
| { |
| if (false == decimatepixel) { |
| if (false == byteswaporder) { |
| /*---------------------------------------------------*/ |
| /* |
| ** RGBA |
| */ |
| /*---------------------------------------------------*/ |
| while (pz > p2) { |
| if (pr <= (p3 + bytesperpixel)) |
| last = true; |
| else |
| last = false; |
| y = *p2; |
| if ((true == last) && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (true == isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (true == isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| s32 = ay[(int)y] + rv[(int)v]; |
| r = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] - gu[(int)u] - gv[(int)v]; |
| g = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] + bu[(int)u]; |
| b = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| |
| if ((true == last) && rump) { |
| pcache = &cache[0]; |
| switch (bytesperpixel - rump) { |
| case 1: { |
| *p3 = r; |
| *pcache++ = g; |
| *pcache++ = b; |
| *pcache++ = 0; |
| break; |
| } |
| case 2: { |
| *p3 = r; |
| *(p3 + 1) = g; |
| *pcache++ = b; |
| *pcache++ = 0; |
| break; |
| } |
| case 3: { |
| *p3 = r; |
| *(p3 + 1) = g; |
| *(p3 + 2) = b; |
| *pcache++ = 0; |
| break; |
| } |
| default: { |
| SAY("MISTAKE: %i=rump\n", \ |
| bytesperpixel - rump); |
| return -EFAULT; |
| } |
| } |
| } else { |
| *p3 = r; |
| *(p3 + 1) = g; |
| *(p3 + 2) = b; |
| *(p3 + 3) = 0; |
| } |
| p2 += 2; |
| if (true == isuy) |
| isuy = false; |
| else |
| isuy = true; |
| p3 += bytesperpixel; |
| } |
| return 0; |
| } else { |
| /*---------------------------------------------------*/ |
| /* |
| ** BGRA |
| */ |
| /*---------------------------------------------------*/ |
| while (pz > p2) { |
| if (pr <= (p3 + bytesperpixel)) |
| last = true; |
| else |
| last = false; |
| y = *p2; |
| if ((true == last) && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (true == isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (true == isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| s32 = ay[(int)y] + rv[(int)v]; |
| r = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] - gu[(int)u] - gv[(int)v]; |
| g = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] + bu[(int)u]; |
| b = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| |
| if ((true == last) && rump) { |
| pcache = &cache[0]; |
| switch (bytesperpixel - rump) { |
| case 1: { |
| *p3 = b; |
| *pcache++ = g; |
| *pcache++ = r; |
| *pcache++ = 0; |
| break; |
| } |
| case 2: { |
| *p3 = b; |
| *(p3 + 1) = g; |
| *pcache++ = r; |
| *pcache++ = 0; |
| break; |
| } |
| case 3: { |
| *p3 = b; |
| *(p3 + 1) = g; |
| *(p3 + 2) = r; |
| *pcache++ = 0; |
| break; |
| } |
| default: { |
| SAY("MISTAKE: %i=rump\n", \ |
| bytesperpixel - rump); |
| return -EFAULT; |
| } |
| } |
| } else { |
| *p3 = b; |
| *(p3 + 1) = g; |
| *(p3 + 2) = r; |
| *(p3 + 3) = 0; |
| } |
| p2 += 2; |
| if (true == isuy) |
| isuy = false; |
| else |
| isuy = true; |
| p3 += bytesperpixel; |
| } |
| } |
| return 0; |
| } else { |
| if (false == byteswaporder) { |
| /*---------------------------------------------------*/ |
| /* |
| ** RGBA DECIMATED |
| */ |
| /*---------------------------------------------------*/ |
| while (pz > p2) { |
| if (pr <= (p3 + bytesperpixel)) |
| last = true; |
| else |
| last = false; |
| y = *p2; |
| if ((true == last) && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (true == isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (true == isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| if (true == isuy) { |
| |
| s32 = ay[(int)y] + rv[(int)v]; |
| r = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] - gu[(int)u] - \ |
| gv[(int)v]; |
| g = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] + bu[(int)u]; |
| b = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| |
| if ((true == last) && rump) { |
| pcache = &cache[0]; |
| switch (bytesperpixel - rump) { |
| case 1: { |
| *p3 = r; |
| *pcache++ = g; |
| *pcache++ = b; |
| *pcache++ = 0; |
| break; |
| } |
| case 2: { |
| *p3 = r; |
| *(p3 + 1) = g; |
| *pcache++ = b; |
| *pcache++ = 0; |
| break; |
| } |
| case 3: { |
| *p3 = r; |
| *(p3 + 1) = g; |
| *(p3 + 2) = b; |
| *pcache++ = 0; |
| break; |
| } |
| default: { |
| SAY("MISTAKE: " \ |
| "%i=rump\n", \ |
| bytesperpixel - \ |
| rump); |
| return -EFAULT; |
| } |
| } |
| } else { |
| *p3 = r; |
| *(p3 + 1) = g; |
| *(p3 + 2) = b; |
| *(p3 + 3) = 0; |
| } |
| isuy = false; |
| p3 += bytesperpixel; |
| } else |
| isuy = true; |
| p2 += 2; |
| } |
| return 0; |
| } else { |
| /*---------------------------------------------------*/ |
| /* |
| ** BGRA DECIMATED |
| */ |
| /*---------------------------------------------------*/ |
| while (pz > p2) { |
| if (pr <= (p3 + bytesperpixel)) |
| last = true; |
| else |
| last = false; |
| y = *p2; |
| if ((true == last) && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (true == isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (true == isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| if (true == isuy) { |
| s32 = ay[(int)y] + rv[(int)v]; |
| r = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] - gu[(int)u] - \ |
| gv[(int)v]; |
| g = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| s32 = ay[(int)y] + bu[(int)u]; |
| b = (255 < s32) ? 255 : ((0 > s32) ? \ |
| 0 : (__u8)s32); |
| |
| if ((true == last) && rump) { |
| pcache = &cache[0]; |
| switch (bytesperpixel - rump) { |
| case 1: { |
| *p3 = b; |
| *pcache++ = g; |
| *pcache++ = r; |
| *pcache++ = 0; |
| break; |
| } |
| case 2: { |
| *p3 = b; |
| *(p3 + 1) = g; |
| *pcache++ = r; |
| *pcache++ = 0; |
| break; |
| } |
| case 3: { |
| *p3 = b; |
| *(p3 + 1) = g; |
| *(p3 + 2) = r; |
| *pcache++ = 0; |
| break; |
| } |
| default: { |
| SAY("MISTAKE: " \ |
| "%i=rump\n", \ |
| bytesperpixel - rump); |
| return -EFAULT; |
| } |
| } |
| } else { |
| *p3 = b; |
| *(p3 + 1) = g; |
| *(p3 + 2) = r; |
| *(p3 + 3) = 0; |
| } |
| isuy = false; |
| p3 += bytesperpixel; |
| } else |
| isuy = true; |
| p2 += 2; |
| } |
| return 0; |
| } |
| } |
| break; |
| } |
| default: { |
| SAY("MISTAKE: %i=bytesperpixel\n", bytesperpixel); |
| return -EFAULT; |
| } |
| } |
| return 0; |
| } |
| /*****************************************************************************/ |
| void |
| debrief(struct easycap *peasycap) |
| { |
| if ((struct usb_device *)NULL != peasycap->pusb_device) { |
| check_stk(peasycap->pusb_device); |
| check_saa(peasycap->pusb_device); |
| sayreadonly(peasycap); |
| SAY("%i=peasycap->field_fill\n", peasycap->field_fill); |
| SAY("%i=peasycap->field_read\n", peasycap->field_read); |
| SAY("%i=peasycap->frame_fill\n", peasycap->frame_fill); |
| SAY("%i=peasycap->frame_read\n", peasycap->frame_read); |
| } |
| return; |
| } |
| /*****************************************************************************/ |
| void |
| sayreadonly(struct easycap *peasycap) |
| { |
| static int done; |
| int got00, got1F, got60, got61, got62; |
| |
| if ((!done) && ((struct usb_device *)NULL != peasycap->pusb_device)) { |
| done = 1; |
| got00 = read_saa(peasycap->pusb_device, 0x00); |
| got1F = read_saa(peasycap->pusb_device, 0x1F); |
| got60 = read_saa(peasycap->pusb_device, 0x60); |
| got61 = read_saa(peasycap->pusb_device, 0x61); |
| got62 = read_saa(peasycap->pusb_device, 0x62); |
| SAY("0x%02X=reg0x00 0x%02X=reg0x1F\n", got00, got1F); |
| SAY("0x%02X=reg0x60 0x%02X=reg0x61 0x%02X=reg0x62\n", \ |
| got60, got61, got62); |
| } |
| return; |
| } |
| /*****************************************************************************/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * SEE CORBET ET AL. "LINUX DEVICE DRIVERS", 3rd EDITION, PAGES 430-434 |
| */ |
| /*---------------------------------------------------------------------------*/ |
| int easycap_mmap(struct file *file, struct vm_area_struct *pvma) |
| { |
| |
| JOT(8, "\n"); |
| |
| pvma->vm_ops = &easycap_vm_ops; |
| pvma->vm_flags |= VM_RESERVED; |
| if (NULL != file) |
| pvma->vm_private_data = file->private_data; |
| easycap_vma_open(pvma); |
| return 0; |
| } |
| /*****************************************************************************/ |
| void |
| easycap_vma_open(struct vm_area_struct *pvma) |
| { |
| struct easycap *peasycap; |
| |
| peasycap = pvma->vm_private_data; |
| if (NULL != peasycap) |
| peasycap->vma_many++; |
| |
| JOT(8, "%i=peasycap->vma_many\n", peasycap->vma_many); |
| |
| return; |
| } |
| /*****************************************************************************/ |
| void |
| easycap_vma_close(struct vm_area_struct *pvma) |
| { |
| struct easycap *peasycap; |
| |
| peasycap = pvma->vm_private_data; |
| if (NULL != peasycap) { |
| peasycap->vma_many--; |
| JOT(8, "%i=peasycap->vma_many\n", peasycap->vma_many); |
| } |
| return; |
| } |
| /*****************************************************************************/ |
| int |
| easycap_vma_fault(struct vm_area_struct *pvma, struct vm_fault *pvmf) |
| { |
| int k, m, retcode; |
| void *pbuf; |
| struct page *page; |
| struct easycap *peasycap; |
| |
| retcode = VM_FAULT_NOPAGE; |
| pbuf = (void *)NULL; |
| page = (struct page *)NULL; |
| |
| if (NULL == pvma) { |
| SAY("pvma is NULL\n"); |
| return retcode; |
| } |
| if (NULL == pvmf) { |
| SAY("pvmf is NULL\n"); |
| return retcode; |
| } |
| |
| k = (pvmf->pgoff) / (FRAME_BUFFER_SIZE/PAGE_SIZE); |
| m = (pvmf->pgoff) % (FRAME_BUFFER_SIZE/PAGE_SIZE); |
| |
| if (!m) |
| JOT(4, "%4i=k, %4i=m\n", k, m); |
| else |
| JOT(16, "%4i=k, %4i=m\n", k, m); |
| |
| if ((0 > k) || (FRAME_BUFFER_MANY <= k)) { |
| SAY("ERROR: buffer index %i out of range\n", k); |
| return retcode; |
| } |
| if ((0 > m) || (FRAME_BUFFER_SIZE/PAGE_SIZE <= m)) { |
| SAY("ERROR: page number %i out of range\n", m); |
| return retcode; |
| } |
| peasycap = pvma->vm_private_data; |
| if (NULL == peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return retcode; |
| } |
| mutex_lock(&(peasycap->mutex_mmap_video[0])); |
| /*---------------------------------------------------------------------------*/ |
| pbuf = peasycap->frame_buffer[k][m].pgo; |
| if (NULL == pbuf) { |
| SAY("ERROR: pbuf is NULL\n"); |
| goto finish; |
| } |
| page = virt_to_page(pbuf); |
| if (NULL == page) { |
| SAY("ERROR: page is NULL\n"); |
| goto finish; |
| } |
| get_page(page); |
| /*---------------------------------------------------------------------------*/ |
| finish: |
| mutex_unlock(&(peasycap->mutex_mmap_video[0])); |
| if (NULL == page) { |
| SAY("ERROR: page is NULL after get_page(page)\n"); |
| } else { |
| pvmf->page = page; |
| retcode = VM_FAULT_MINOR; |
| } |
| return retcode; |
| } |
| /*****************************************************************************/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * ON COMPLETION OF A VIDEO URB ITS DATA IS COPIED TO THE FIELD BUFFERS |
| * PROVIDED peasycap->video_idle IS ZER0. REGARDLESS OF THIS BEING TRUE, |
| * IT IS RESUBMITTED PROVIDED peasycap->video_isoc_streaming IS NOT ZERO. |
| * |
| * THIS FUNCTION IS AN INTERRUPT SERVICE ROUTINE AND MUST NOT SLEEP. |
| * |
| * INFORMATION ABOUT THE VALIDITY OF THE CONTENTS OF THE FIELD BUFFER ARE |
| * STORED IN THE TWO-BYTE STATUS PARAMETER |
| * peasycap->field_buffer[peasycap->field_fill][0].kount |
| * NOTICE THAT THE INFORMATION IS STORED ONLY WITH PAGE 0 OF THE FIELD BUFFER. |
| * |
| * THE LOWER BYTE CONTAINS THE FIELD PARITY BYTE FURNISHED BY THE SAA7113H |
| * CHIP. |
| * |
| * THE UPPER BYTE IS ZERO IF NO PROBLEMS, OTHERWISE: |
| * 0 != (kount & 0x8000) => AT LEAST ONE URB COMPLETED WITH ERRORS |
| * 0 != (kount & 0x4000) => BUFFER HAS TOO MUCH DATA |
| * 0 != (kount & 0x2000) => BUFFER HAS NOT ENOUGH DATA |
| * 0 != (kount & 0x0400) => FIELD WAS SUBMITTED BY BRIDGER ROUTINE |
| * 0 != (kount & 0x0200) => FIELD BUFFER NOT YET CHECKED |
| * 0 != (kount & 0x0100) => BUFFER HAS TWO EXTRA BYTES - WHY? |
| */ |
| /*---------------------------------------------------------------------------*/ |
| void |
| easycap_complete(struct urb *purb) |
| { |
| static int mt; |
| struct easycap *peasycap; |
| struct data_buffer *pfield_buffer; |
| char errbuf[16]; |
| int i, more, much, leap, rc, last; |
| int videofieldamount; |
| unsigned int override; |
| int framestatus, framelength, frameactual, frameoffset; |
| __u8 *pu; |
| #if defined(BRIDGER) |
| struct timeval timeval; |
| long long usec; |
| #endif /*BRIDGER*/ |
| |
| if (NULL == purb) { |
| SAY("ERROR: easycap_complete(): purb is NULL\n"); |
| return; |
| } |
| peasycap = purb->context; |
| if (NULL == peasycap) { |
| SAY("ERROR: easycap_complete(): peasycap is NULL\n"); |
| return; |
| } |
| |
| if (peasycap->video_eof) |
| return; |
| |
| for (i = 0; i < VIDEO_ISOC_BUFFER_MANY; i++) |
| if (purb->transfer_buffer == peasycap->video_isoc_buffer[i].pgo) |
| break; |
| JOT(16, "%2i=urb\n", i); |
| last = peasycap->video_isoc_sequence; |
| if ((((VIDEO_ISOC_BUFFER_MANY - 1) == last) && \ |
| (0 != i)) || \ |
| (((VIDEO_ISOC_BUFFER_MANY - 1) != last) && \ |
| ((last + 1) != i))) { |
| SAY("ERROR: out-of-order urbs %i,%i ... continuing\n", last, i); |
| } |
| peasycap->video_isoc_sequence = i; |
| |
| if (peasycap->video_idle) { |
| JOT(16, "%i=video_idle %i=video_isoc_streaming\n", \ |
| peasycap->video_idle, peasycap->video_isoc_streaming); |
| if (peasycap->video_isoc_streaming) { |
| rc = usb_submit_urb(purb, GFP_ATOMIC); |
| if (0 != rc) { |
| SAY("ERROR: while %i=video_idle, " \ |
| "usb_submit_urb() failed with rc:\n", \ |
| peasycap->video_idle); |
| switch (rc) { |
| case -ENOMEM: { |
| SAY("ENOMEM\n"); |
| break; |
| } |
| case -ENODEV: { |
| SAY("ENODEV\n"); |
| break; |
| } |
| case -ENXIO: { |
| SAY("ENXIO\n"); |
| break; |
| } |
| case -EINVAL: { |
| SAY("EINVAL\n"); |
| break; |
| } |
| case -EAGAIN: { |
| SAY("EAGAIN\n"); |
| break; |
| } |
| case -EFBIG: { |
| SAY("EFBIG\n"); |
| break; |
| } |
| case -EPIPE: { |
| SAY("EPIPE\n"); |
| break; |
| } |
| case -EMSGSIZE: { |
| SAY("EMSGSIZE\n"); |
| break; |
| } |
| case -ENOSPC: { |
| SAY("ENOSPC\n"); |
| break; |
| } |
| default: { |
| SAY("0x%08X\n", rc); |
| break; |
| } |
| } |
| } |
| } |
| return; |
| } |
| override = 0; |
| /*---------------------------------------------------------------------------*/ |
| if (FIELD_BUFFER_MANY <= peasycap->field_fill) { |
| SAY("ERROR: bad peasycap->field_fill\n"); |
| return; |
| } |
| if (purb->status) { |
| if ((-ESHUTDOWN == purb->status) || (-ENOENT == purb->status)) { |
| JOT(8, "urb status -ESHUTDOWN or -ENOENT\n"); |
| return; |
| } |
| |
| (peasycap->field_buffer[peasycap->field_fill][0].kount) |= 0x8000 ; |
| SAY("ERROR: bad urb status:\n"); |
| switch (purb->status) { |
| case -EINPROGRESS: { |
| SAY("-EINPROGRESS\n"); break; |
| } |
| case -ENOSR: { |
| SAY("-ENOSR\n"); break; |
| } |
| case -EPIPE: { |
| SAY("-EPIPE\n"); break; |
| } |
| case -EOVERFLOW: { |
| SAY("-EOVERFLOW\n"); break; |
| } |
| case -EPROTO: { |
| SAY("-EPROTO\n"); break; |
| } |
| case -EILSEQ: { |
| SAY("-EILSEQ\n"); break; |
| } |
| case -ETIMEDOUT: { |
| SAY("-ETIMEDOUT\n"); break; |
| } |
| case -EMSGSIZE: { |
| SAY("-EMSGSIZE\n"); break; |
| } |
| case -EOPNOTSUPP: { |
| SAY("-EOPNOTSUPP\n"); break; |
| } |
| case -EPFNOSUPPORT: { |
| SAY("-EPFNOSUPPORT\n"); break; |
| } |
| case -EAFNOSUPPORT: { |
| SAY("-EAFNOSUPPORT\n"); break; |
| } |
| case -EADDRINUSE: { |
| SAY("-EADDRINUSE\n"); break; |
| } |
| case -EADDRNOTAVAIL: { |
| SAY("-EADDRNOTAVAIL\n"); break; |
| } |
| case -ENOBUFS: { |
| SAY("-ENOBUFS\n"); break; |
| } |
| case -EISCONN: { |
| SAY("-EISCONN\n"); break; |
| } |
| case -ENOTCONN: { |
| SAY("-ENOTCONN\n"); break; |
| } |
| case -ESHUTDOWN: { |
| SAY("-ESHUTDOWN\n"); break; |
| } |
| case -ENOENT: { |
| SAY("-ENOENT\n"); break; |
| } |
| case -ECONNRESET: { |
| SAY("-ECONNRESET\n"); break; |
| } |
| case -ENOSPC: { |
| SAY("ENOSPC\n"); break; |
| } |
| default: { |
| SAY("unknown error code 0x%08X\n", purb->status); break; |
| } |
| } |
| /*---------------------------------------------------------------------------*/ |
| } else { |
| for (i = 0; i < purb->number_of_packets; i++) { |
| if (0 != purb->iso_frame_desc[i].status) { |
| (peasycap->field_buffer\ |
| [peasycap->field_fill][0].kount) |= 0x8000 ; |
| switch (purb->iso_frame_desc[i].status) { |
| case 0: { |
| strcpy(&errbuf[0], "OK"); break; |
| } |
| case -ENOENT: { |
| strcpy(&errbuf[0], "-ENOENT"); break; |
| } |
| case -EINPROGRESS: { |
| strcpy(&errbuf[0], "-EINPROGRESS"); break; |
| } |
| case -EPROTO: { |
| strcpy(&errbuf[0], "-EPROTO"); break; |
| } |
| case -EILSEQ: { |
| strcpy(&errbuf[0], "-EILSEQ"); break; |
| } |
| case -ETIME: { |
| strcpy(&errbuf[0], "-ETIME"); break; |
| } |
| case -ETIMEDOUT: { |
| strcpy(&errbuf[0], "-ETIMEDOUT"); break; |
| } |
| case -EPIPE: { |
| strcpy(&errbuf[0], "-EPIPE"); break; |
| } |
| case -ECOMM: { |
| strcpy(&errbuf[0], "-ECOMM"); break; |
| } |
| case -ENOSR: { |
| strcpy(&errbuf[0], "-ENOSR"); break; |
| } |
| case -EOVERFLOW: { |
| strcpy(&errbuf[0], "-EOVERFLOW"); break; |
| } |
| case -EREMOTEIO: { |
| strcpy(&errbuf[0], "-EREMOTEIO"); break; |
| } |
| case -ENODEV: { |
| strcpy(&errbuf[0], "-ENODEV"); break; |
| } |
| case -EXDEV: { |
| strcpy(&errbuf[0], "-EXDEV"); break; |
| } |
| case -EINVAL: { |
| strcpy(&errbuf[0], "-EINVAL"); break; |
| } |
| case -ECONNRESET: { |
| strcpy(&errbuf[0], "-ECONNRESET"); break; |
| } |
| case -ENOSPC: { |
| SAY("ENOSPC\n"); break; |
| } |
| case -ESHUTDOWN: { |
| strcpy(&errbuf[0], "-ESHUTDOWN"); break; |
| } |
| default: { |
| strcpy(&errbuf[0], "unknown error"); break; |
| } |
| } |
| } |
| framestatus = purb->iso_frame_desc[i].status; |
| framelength = purb->iso_frame_desc[i].length; |
| frameactual = purb->iso_frame_desc[i].actual_length; |
| frameoffset = purb->iso_frame_desc[i].offset; |
| |
| JOT(16, "frame[%2i]:" \ |
| "%4i=status " \ |
| "%4i=actual " \ |
| "%4i=length " \ |
| "%5i=offset\n", \ |
| i, framestatus, frameactual, framelength, frameoffset); |
| if (!purb->iso_frame_desc[i].status) { |
| more = purb->iso_frame_desc[i].actual_length; |
| pfield_buffer = &peasycap->field_buffer\ |
| [peasycap->field_fill][peasycap->field_page]; |
| videofieldamount = (peasycap->field_page * \ |
| PAGE_SIZE) + \ |
| (int)(pfield_buffer->pto - pfield_buffer->pgo); |
| if (4 == more) |
| mt++; |
| if (4 < more) { |
| if (mt) { |
| JOT(8, "%4i empty video urb frames\n", mt); |
| mt = 0; |
| } |
| if (FIELD_BUFFER_MANY <= peasycap->field_fill) { |
| SAY("ERROR: bad peasycap->field_fill\n"); |
| return; |
| } |
| if (FIELD_BUFFER_SIZE/PAGE_SIZE <= \ |
| peasycap->field_page) { |
| SAY("ERROR: bad peasycap->field_page\n"); |
| return; |
| } |
| pfield_buffer = &peasycap->field_buffer\ |
| [peasycap->field_fill][peasycap->field_page]; |
| pu = (__u8 *)(purb->transfer_buffer + \ |
| purb->iso_frame_desc[i].offset); |
| if (0x80 & *pu) |
| leap = 8; |
| else |
| leap = 4; |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * EIGHT-BYTE END-OF-VIDEOFIELD MARKER. |
| * NOTE: A SUCCESSION OF URB FRAMES FOLLOWING THIS ARE EMPTY, |
| * CORRESPONDING TO THE FIELD FLYBACK (VERTICAL BLANKING) PERIOD. |
| * |
| * PROVIDED THE FIELD BUFFER CONTAINS GOOD DATA AS INDICATED BY A ZERO UPPER |
| * BYTE OF |
| * peasycap->field_buffer[peasycap->field_fill][0].kount |
| * THE CONTENTS OF THE FIELD BUFFER ARE OFFERED TO dqbuf(), field_read IS |
| * UPDATED AND field_fill IS BUMPED. IF THE FIELD BUFFER CONTAINS BAD DATA |
| * NOTHING IS OFFERED TO dqbuf(). |
| * |
| * THE DECISION ON WHETHER THE PARITY OF THE OFFERED FIELD BUFFER IS RIGHT |
| * RESTS WITH dqbuf(). |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if ((8 == more) || override) { |
| if (videofieldamount > \ |
| peasycap->videofieldamount) { |
| if (2 == videofieldamount - \ |
| peasycap->\ |
| videofieldamount) |
| (peasycap->field_buffer\ |
| [peasycap->field_fill]\ |
| [0].kount) |= 0x0100; |
| else |
| (peasycap->field_buffer\ |
| [peasycap->field_fill]\ |
| [0].kount) |= 0x4000; |
| } else if (videofieldamount < \ |
| peasycap->\ |
| videofieldamount) { |
| (peasycap->field_buffer\ |
| [peasycap->field_fill]\ |
| [0].kount) |= 0x2000; |
| } |
| if (!(0xFF00 & peasycap->field_buffer\ |
| [peasycap->field_fill]\ |
| [0].kount)) { |
| (peasycap->video_junk)--; |
| if (-16 > peasycap->video_junk) |
| peasycap->video_junk = -16; |
| peasycap->field_read = \ |
| (peasycap->\ |
| field_fill)++; |
| |
| if (FIELD_BUFFER_MANY <= \ |
| peasycap->field_fill) |
| peasycap->field_fill = 0; |
| peasycap->field_page = 0; |
| pfield_buffer = &peasycap->\ |
| field_buffer\ |
| [peasycap->field_fill]\ |
| [peasycap->field_page]; |
| pfield_buffer->pto = \ |
| pfield_buffer->pgo; |
| |
| JOT(8, "bumped to: %i=peasycap->" \ |
| "field_fill %i=parity\n", \ |
| peasycap->field_fill, \ |
| 0x00FF & pfield_buffer->kount); |
| JOT(8, "field buffer %i has %i " \ |
| "bytes fit to be read\n", \ |
| peasycap->field_read, \ |
| videofieldamount); |
| JOT(8, "wakeup call to wq_video, " \ |
| "%i=field_read %i=field_fill "\ |
| "%i=parity\n", \ |
| peasycap->field_read, \ |
| peasycap->field_fill, \ |
| 0x00FF & peasycap->\ |
| field_buffer[peasycap->\ |
| field_read][0].kount); |
| wake_up_interruptible(&(peasycap->\ |
| wq_video)); |
| do_gettimeofday(&peasycap->timeval7); |
| } else { |
| peasycap->video_junk++; |
| JOT(8, "field buffer %i had %i " \ |
| "bytes, now discarded\n", \ |
| peasycap->field_fill, \ |
| videofieldamount); |
| |
| (peasycap->field_fill)++; |
| |
| if (FIELD_BUFFER_MANY <= \ |
| peasycap->field_fill) |
| peasycap->field_fill = 0; |
| peasycap->field_page = 0; |
| pfield_buffer = \ |
| &peasycap->field_buffer\ |
| [peasycap->field_fill]\ |
| [peasycap->field_page]; |
| pfield_buffer->pto = \ |
| pfield_buffer->pgo; |
| |
| JOT(8, "bumped to: %i=peasycap->" \ |
| "field_fill %i=parity\n", \ |
| peasycap->field_fill, \ |
| 0x00FF & pfield_buffer->kount); |
| } |
| if (8 == more) { |
| JOT(8, "end-of-field: received " \ |
| "parity byte 0x%02X\n", \ |
| (0xFF & *pu)); |
| if (0x40 & *pu) |
| pfield_buffer->kount = 0x0000; |
| else |
| pfield_buffer->kount = 0x0001; |
| JOT(8, "end-of-field: 0x%02X=kount\n",\ |
| 0xFF & pfield_buffer->kount); |
| } |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * COPY more BYTES FROM ISOC BUFFER TO FIELD BUFFER |
| */ |
| /*---------------------------------------------------------------------------*/ |
| pu += leap; |
| more -= leap; |
| |
| if (FIELD_BUFFER_MANY <= peasycap->field_fill) { |
| SAY("ERROR: bad peasycap->field_fill\n"); |
| return; |
| } |
| if (FIELD_BUFFER_SIZE/PAGE_SIZE <= \ |
| peasycap->field_page) { |
| SAY("ERROR: bad peasycap->field_page\n"); |
| return; |
| } |
| pfield_buffer = &peasycap->field_buffer\ |
| [peasycap->field_fill][peasycap->field_page]; |
| while (more) { |
| pfield_buffer = &peasycap->field_buffer\ |
| [peasycap->field_fill]\ |
| [peasycap->field_page]; |
| if (PAGE_SIZE < (pfield_buffer->pto - \ |
| pfield_buffer->pgo)) { |
| SAY("ERROR: bad pfield_buffer->pto\n"); |
| return; |
| } |
| if (PAGE_SIZE == (pfield_buffer->pto - \ |
| pfield_buffer->pgo)) { |
| (peasycap->field_page)++; |
| if (FIELD_BUFFER_SIZE/PAGE_SIZE <= \ |
| peasycap->field_page) { |
| JOT(16, "wrapping peasycap->" \ |
| "field_page\n"); |
| peasycap->field_page = 0; |
| } |
| pfield_buffer = &peasycap->\ |
| field_buffer\ |
| [peasycap->field_fill]\ |
| [peasycap->field_page]; |
| pfield_buffer->pto = \ |
| pfield_buffer->pgo; |
| } |
| |
| much = PAGE_SIZE - (int)(pfield_buffer->pto - \ |
| pfield_buffer->pgo); |
| |
| if (much > more) |
| much = more; |
| memcpy(pfield_buffer->pto, pu, much); |
| pu += much; |
| (pfield_buffer->pto) += much; |
| more -= much; |
| } |
| } |
| } |
| } |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * |
| * |
| * *** UNDER DEVELOPMENT/TESTING - NOT READY YET! *** |
| * |
| * |
| * |
| * VIDEOTAPES MAY HAVE BEEN MANUALLY PAUSED AND RESTARTED DURING RECORDING. |
| * THIS CAUSES LOSS OF SYNC, CONFUSING DOWNSTREAM USERSPACE PROGRAMS WHICH |
| * MAY INTERPRET THE INTERRUPTION AS A SYMPTOM OF LATENCY. TO OVERCOME THIS |
| * THE DRIVER BRIDGES THE HIATUS BY SENDING DUMMY VIDEO FRAMES AT ROUGHLY |
| * THE RIGHT TIME INTERVALS IN THE HOPE OF PERSUADING THE DOWNSTREAM USERSPACE |
| * PROGRAM TO RESUME NORMAL SERVICE WHEN THE INTERRUPTION IS OVER. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| #if defined(BRIDGER) |
| do_gettimeofday(&timeval); |
| if (peasycap->timeval7.tv_sec) { |
| usec = 1000000*(timeval.tv_sec - peasycap->timeval7.tv_sec) + \ |
| (timeval.tv_usec - peasycap->timeval7.tv_usec); |
| if (usec > (peasycap->usec + peasycap->tolerate)) { |
| JOT(8, "bridging hiatus\n"); |
| peasycap->video_junk = 0; |
| peasycap->field_buffer[peasycap->field_fill][0].kount |= 0x0400; |
| |
| peasycap->field_read = (peasycap->field_fill)++; |
| |
| if (FIELD_BUFFER_MANY <= peasycap->field_fill) \ |
| peasycap->field_fill = 0; |
| peasycap->field_page = 0; |
| pfield_buffer = &peasycap->field_buffer\ |
| [peasycap->field_fill][peasycap->field_page]; |
| pfield_buffer->pto = pfield_buffer->pgo; |
| |
| JOT(8, "bumped to: %i=peasycap->field_fill %i=parity\n", \ |
| peasycap->field_fill, 0x00FF & pfield_buffer->kount); |
| JOT(8, "field buffer %i has %i bytes to be overwritten\n", \ |
| peasycap->field_read, videofieldamount); |
| JOT(8, "wakeup call to wq_video, " \ |
| "%i=field_read %i=field_fill %i=parity\n", \ |
| peasycap->field_read, peasycap->field_fill, \ |
| 0x00FF & \ |
| peasycap->field_buffer[peasycap->field_read][0].kount); |
| wake_up_interruptible(&(peasycap->wq_video)); |
| do_gettimeofday(&peasycap->timeval7); |
| } |
| } |
| #endif /*BRIDGER*/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * RESUBMIT THIS URB, UNLESS A SEVERE PERSISTENT ERROR CONDITION EXISTS. |
| * |
| * IF THE WAIT QUEUES ARE NOT CLEARED IN RESPONSE TO AN ERROR CONDITION |
| * THE USERSPACE PROGRAM, E.G. mplayer, MAY HANG ON EXIT. BEWARE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (VIDEO_ISOC_BUFFER_MANY <= peasycap->video_junk) { |
| SAY("easycap driver shutting down on condition green\n"); |
| peasycap->video_eof = 1; |
| peasycap->audio_eof = 1; |
| peasycap->video_junk = -VIDEO_ISOC_BUFFER_MANY; |
| wake_up_interruptible(&(peasycap->wq_video)); |
| wake_up_interruptible(&(peasycap->wq_audio)); |
| return; |
| } |
| if (peasycap->video_isoc_streaming) { |
| rc = usb_submit_urb(purb, GFP_ATOMIC); |
| if (0 != rc) { |
| SAY("ERROR: while %i=video_idle, usb_submit_urb() failed " \ |
| "with rc:\n", peasycap->video_idle); |
| switch (rc) { |
| case -ENOMEM: { |
| SAY("ENOMEM\n"); break; |
| } |
| case -ENODEV: { |
| SAY("ENODEV\n"); break; |
| } |
| case -ENXIO: { |
| SAY("ENXIO\n"); break; |
| } |
| case -EINVAL: { |
| SAY("EINVAL\n"); break; |
| } |
| case -EAGAIN: { |
| SAY("EAGAIN\n"); break; |
| } |
| case -EFBIG: { |
| SAY("EFBIG\n"); break; |
| } |
| case -EPIPE: { |
| SAY("EPIPE\n"); break; |
| } |
| case -EMSGSIZE: { |
| SAY("EMSGSIZE\n"); break; |
| } |
| case -ENOSPC: { |
| SAY("ENOSPC\n"); break; |
| } |
| default: { |
| SAY("0x%08X\n", rc); break; |
| } |
| } |
| } |
| } |
| return; |
| } |
| /*****************************************************************************/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * |
| * FIXME |
| * |
| * |
| * THIS FUNCTION ASSUMES THAT, ON EACH AND EVERY OCCASION THAT THE DEVICE IS |
| * PHYSICALLY PLUGGED IN, INTERFACE 0 IS PROBED FIRST. |
| * IF THIS IS NOT TRUE, THERE IS THE POSSIBILITY OF AN Oops. |
| * |
| * THIS HAS NEVER BEEN A PROBLEM IN PRACTICE, BUT SOMETHING SEEMS WRONG HERE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| int |
| easycap_usb_probe(struct usb_interface *pusb_interface, \ |
| const struct usb_device_id *id) |
| { |
| struct usb_device *pusb_device, *pusb_device1; |
| struct usb_host_interface *pusb_host_interface; |
| struct usb_endpoint_descriptor *pepd; |
| struct usb_interface_descriptor *pusb_interface_descriptor; |
| struct usb_interface_assoc_descriptor *pusb_interface_assoc_descriptor; |
| struct urb *purb; |
| static struct easycap *peasycap /*=NULL*/; |
| struct data_urb *pdata_urb; |
| size_t wMaxPacketSize; |
| int ISOCwMaxPacketSize; |
| int BULKwMaxPacketSize; |
| int INTwMaxPacketSize; |
| int CTRLwMaxPacketSize; |
| __u8 bEndpointAddress; |
| __u8 ISOCbEndpointAddress; |
| __u8 INTbEndpointAddress; |
| int isin, i, j, k, m; |
| __u8 bInterfaceNumber; |
| __u8 bInterfaceClass; |
| __u8 bInterfaceSubClass; |
| void *pbuf; |
| int okalt[8], isokalt; |
| int okepn[8], isokepn; |
| int okmps[8], isokmps; |
| int maxpacketsize; |
| int rc; |
| |
| JOT(4, "\n"); |
| |
| if ((struct usb_interface *)NULL == pusb_interface) { |
| SAY("ERROR: pusb_interface is NULL\n"); |
| return -EFAULT; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * GET POINTER TO STRUCTURE usb_device |
| */ |
| /*---------------------------------------------------------------------------*/ |
| pusb_device1 = container_of(pusb_interface->dev.parent, \ |
| struct usb_device, dev); |
| if ((struct usb_device *)NULL == pusb_device1) { |
| SAY("ERROR: pusb_device1 is NULL\n"); |
| return -EFAULT; |
| } |
| pusb_device = usb_get_dev(pusb_device1); |
| if ((struct usb_device *)NULL == pusb_device) { |
| SAY("ERROR: pusb_device is NULL\n"); |
| return -EFAULT; |
| } |
| if ((unsigned long int)pusb_device1 != (unsigned long int)pusb_device) { |
| JOT(4, "ERROR: pusb_device1 != pusb_device\n"); |
| return -EFAULT; |
| } |
| |
| JOT(4, "bNumConfigurations=%i\n", pusb_device->descriptor.bNumConfigurations); |
| |
| /*---------------------------------------------------------------------------*/ |
| pusb_host_interface = pusb_interface->cur_altsetting; |
| if (NULL == pusb_host_interface) { |
| SAY("ERROR: pusb_host_interface is NULL\n"); |
| return -EFAULT; |
| } |
| pusb_interface_descriptor = &(pusb_host_interface->desc); |
| if (NULL == pusb_interface_descriptor) { |
| SAY("ERROR: pusb_interface_descriptor is NULL\n"); |
| return -EFAULT; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * GET PROPERTIES OF PROBED INTERFACE |
| */ |
| /*---------------------------------------------------------------------------*/ |
| bInterfaceNumber = pusb_interface_descriptor->bInterfaceNumber; |
| bInterfaceClass = pusb_interface_descriptor->bInterfaceClass; |
| bInterfaceSubClass = pusb_interface_descriptor->bInterfaceSubClass; |
| |
| JOT(4, "intf[%i]: pusb_interface->num_altsetting=%i\n", \ |
| bInterfaceNumber, pusb_interface->num_altsetting); |
| JOT(4, "intf[%i]: pusb_interface->cur_altsetting - " \ |
| "pusb_interface->altsetting=%li\n", bInterfaceNumber, \ |
| (long int)(pusb_interface->cur_altsetting - \ |
| pusb_interface->altsetting)); |
| switch (bInterfaceClass) { |
| case USB_CLASS_AUDIO: { |
| JOT(4, "intf[%i]: bInterfaceClass=0x%02X=USB_CLASS_AUDIO\n", \ |
| bInterfaceNumber, bInterfaceClass); break; |
| } |
| case USB_CLASS_VIDEO: { |
| JOT(4, "intf[%i]: bInterfaceClass=0x%02X=USB_CLASS_VIDEO\n", \ |
| bInterfaceNumber, bInterfaceClass); break; |
| } |
| case USB_CLASS_VENDOR_SPEC: { |
| JOT(4, "intf[%i]: bInterfaceClass=0x%02X=USB_CLASS_VENDOR_SPEC\n", \ |
| bInterfaceNumber, bInterfaceClass); break; |
| } |
| default: |
| break; |
| } |
| switch (bInterfaceSubClass) { |
| case 0x01: { |
| JOT(4, "intf[%i]: bInterfaceSubClass=0x%02X=AUDIOCONTROL\n", \ |
| bInterfaceNumber, bInterfaceSubClass); break; |
| } |
| case 0x02: { |
| JOT(4, "intf[%i]: bInterfaceSubClass=0x%02X=AUDIOSTREAMING\n", \ |
| bInterfaceNumber, bInterfaceSubClass); break; |
| } |
| case 0x03: { |
| JOT(4, "intf[%i]: bInterfaceSubClass=0x%02X=MIDISTREAMING\n", \ |
| bInterfaceNumber, bInterfaceSubClass); break; |
| } |
| default: |
| break; |
| } |
| /*---------------------------------------------------------------------------*/ |
| pusb_interface_assoc_descriptor = pusb_interface->intf_assoc; |
| if (NULL != pusb_interface_assoc_descriptor) { |
| JOT(4, "intf[%i]: bFirstInterface=0x%02X bInterfaceCount=0x%02X\n", \ |
| bInterfaceNumber, \ |
| pusb_interface_assoc_descriptor->bFirstInterface, \ |
| pusb_interface_assoc_descriptor->bInterfaceCount); |
| } else { |
| JOT(4, "intf[%i]: pusb_interface_assoc_descriptor is NULL\n", \ |
| bInterfaceNumber); |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * A NEW struct easycap IS ALWAYS ALLOCATED WHEN INTERFACE 0 IS PROBED. |
| * IT IS NOT POSSIBLE HERE TO FREE ANY EXISTING struct easycap. THIS |
| * SHOULD HAVE BEEN DONE BY easycap_delete() WHEN THE DEVICE WAS PHYSICALLY |
| * UNPLUGGED. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (0 == bInterfaceNumber) { |
| peasycap = kzalloc(sizeof(struct easycap), GFP_KERNEL); |
| if (NULL == peasycap) { |
| SAY("ERROR: Could not allocate peasycap\n"); |
| return -ENOMEM; |
| } else { |
| peasycap->allocation_video_struct = sizeof(struct easycap); |
| peasycap->allocation_video_page = 0; |
| peasycap->allocation_video_urb = 0; |
| peasycap->allocation_audio_struct = 0; |
| peasycap->allocation_audio_page = 0; |
| peasycap->allocation_audio_urb = 0; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * INITIALIZE THE NEW easycap STRUCTURE. |
| * NO PARAMETERS ARE SPECIFIED HERE REQUIRING THE SETTING OF REGISTERS. |
| * THAT IS DONE FIRST BY easycap_open() AND LATER BY easycap_ioctl(). |
| */ |
| /*---------------------------------------------------------------------------*/ |
| peasycap->pusb_device = pusb_device; |
| peasycap->pusb_interface = pusb_interface; |
| |
| kref_init(&peasycap->kref); |
| JOT(8, "intf[%i]: after kref_init(..._video) " \ |
| "%i=peasycap->kref.refcount.counter\n", \ |
| bInterfaceNumber, peasycap->kref.refcount.counter); |
| |
| init_waitqueue_head(&(peasycap->wq_video)); |
| init_waitqueue_head(&(peasycap->wq_audio)); |
| |
| mutex_init(&(peasycap->mutex_timeval0)); |
| mutex_init(&(peasycap->mutex_timeval1)); |
| |
| for (k = 0; k < FRAME_BUFFER_MANY; k++) |
| mutex_init(&(peasycap->mutex_mmap_video[k])); |
| |
| peasycap->ilk = 0; |
| peasycap->microphone = false; |
| |
| peasycap->video_interface = -1; |
| peasycap->video_altsetting_on = -1; |
| peasycap->video_altsetting_off = -1; |
| peasycap->video_endpointnumber = -1; |
| peasycap->video_isoc_maxframesize = -1; |
| peasycap->video_isoc_buffer_size = -1; |
| |
| peasycap->audio_interface = -1; |
| peasycap->audio_altsetting_on = -1; |
| peasycap->audio_altsetting_off = -1; |
| peasycap->audio_endpointnumber = -1; |
| peasycap->audio_isoc_maxframesize = -1; |
| peasycap->audio_isoc_buffer_size = -1; |
| |
| peasycap->frame_buffer_many = FRAME_BUFFER_MANY; |
| |
| if ((struct mutex *)NULL == &(peasycap->mutex_mmap_video[0])) { |
| SAY("ERROR: &(peasycap->mutex_mmap_video[%i]) is NULL\n", 0); |
| return -EFAULT; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * DYNAMICALLY FILL IN THE AVAILABLE FORMATS. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| rc = fillin_formats(); |
| if (0 > rc) { |
| SAY("ERROR: fillin_formats() returned %i\n", rc); |
| return -EFAULT; |
| } |
| JOT(4, "%i formats available\n", rc); |
| } else { |
| /*---------------------------------------------------------------------------*/ |
| if ((struct easycap *)NULL == peasycap) { |
| SAY("ERROR: peasycap is NULL " \ |
| "when probing interface %i\n", \ |
| bInterfaceNumber); |
| return -EFAULT; |
| } |
| |
| JOT(8, "kref_get() with %i=peasycap->kref.refcount.counter\n", \ |
| (int)peasycap->kref.refcount.counter); |
| kref_get(&peasycap->kref); |
| } |
| /*---------------------------------------------------------------------------*/ |
| if ((USB_CLASS_VIDEO == bInterfaceClass) || \ |
| (USB_CLASS_VENDOR_SPEC == bInterfaceClass)) { |
| if (-1 == peasycap->video_interface) { |
| peasycap->video_interface = bInterfaceNumber; |
| JOT(4, "setting peasycap->video_interface=%i\n", \ |
| peasycap->video_interface); |
| } else { |
| if (peasycap->video_interface != bInterfaceNumber) { |
| SAY("ERROR: attempting to reset " \ |
| "peasycap->video_interface\n"); |
| SAY("...... continuing with " \ |
| "%i=peasycap->video_interface\n", \ |
| peasycap->video_interface); |
| } |
| } |
| } else if ((USB_CLASS_AUDIO == bInterfaceClass) && \ |
| (0x02 == bInterfaceSubClass)) { |
| if (-1 == peasycap->audio_interface) { |
| peasycap->audio_interface = bInterfaceNumber; |
| JOT(4, "setting peasycap->audio_interface=%i\n", \ |
| peasycap->audio_interface); |
| } else { |
| if (peasycap->audio_interface != bInterfaceNumber) { |
| SAY("ERROR: attempting to reset " \ |
| "peasycap->audio_interface\n"); |
| SAY("...... continuing with " \ |
| "%i=peasycap->audio_interface\n", \ |
| peasycap->audio_interface); |
| } |
| } |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * INVESTIGATE ALL ALTSETTINGS. |
| * DONE IN DETAIL BECAUSE USB DEVICE 05e1:0408 HAS DISPARATE INCARNATIONS. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| isokalt = 0; |
| isokepn = 0; |
| isokmps = 0; |
| |
| for (i = 0; i < pusb_interface->num_altsetting; i++) { |
| pusb_host_interface = &(pusb_interface->altsetting[i]); |
| if ((struct usb_host_interface *)NULL == pusb_host_interface) { |
| SAY("ERROR: pusb_host_interface is NULL\n"); |
| return -EFAULT; |
| } |
| pusb_interface_descriptor = &(pusb_host_interface->desc); |
| if ((struct usb_interface_descriptor *)NULL == \ |
| pusb_interface_descriptor) { |
| SAY("ERROR: pusb_interface_descriptor is NULL\n"); |
| return -EFAULT; |
| } |
| |
| JOT(4, "intf[%i]alt[%i]: desc.bDescriptorType=0x%02X\n", \ |
| bInterfaceNumber, i, pusb_interface_descriptor->bDescriptorType); |
| JOT(4, "intf[%i]alt[%i]: desc.bInterfaceNumber=0x%02X\n", \ |
| bInterfaceNumber, i, pusb_interface_descriptor->bInterfaceNumber); |
| JOT(4, "intf[%i]alt[%i]: desc.bAlternateSetting=0x%02X\n", \ |
| bInterfaceNumber, i, pusb_interface_descriptor->bAlternateSetting); |
| JOT(4, "intf[%i]alt[%i]: desc.bNumEndpoints=0x%02X\n", \ |
| bInterfaceNumber, i, pusb_interface_descriptor->bNumEndpoints); |
| JOT(4, "intf[%i]alt[%i]: desc.bInterfaceClass=0x%02X\n", \ |
| bInterfaceNumber, i, pusb_interface_descriptor->bInterfaceClass); |
| JOT(4, "intf[%i]alt[%i]: desc.bInterfaceSubClass=0x%02X\n", \ |
| bInterfaceNumber, i, pusb_interface_descriptor->bInterfaceSubClass); |
| JOT(4, "intf[%i]alt[%i]: desc.bInterfaceProtocol=0x%02X\n", \ |
| bInterfaceNumber, i, pusb_interface_descriptor->bInterfaceProtocol); |
| JOT(4, "intf[%i]alt[%i]: desc.iInterface=0x%02X\n", \ |
| bInterfaceNumber, i, pusb_interface_descriptor->iInterface); |
| |
| ISOCwMaxPacketSize = -1; |
| BULKwMaxPacketSize = -1; |
| INTwMaxPacketSize = -1; |
| CTRLwMaxPacketSize = -1; |
| ISOCbEndpointAddress = 0; |
| INTbEndpointAddress = 0; |
| |
| if (0 == pusb_interface_descriptor->bNumEndpoints) |
| JOT(4, "intf[%i]alt[%i] has no endpoints\n", \ |
| bInterfaceNumber, i); |
| /*---------------------------------------------------------------------------*/ |
| for (j = 0; j < pusb_interface_descriptor->bNumEndpoints; j++) { |
| pepd = &(pusb_host_interface->endpoint[j].desc); |
| if ((struct usb_endpoint_descriptor *)NULL == pepd) { |
| SAY("ERROR: pepd is NULL.\n"); |
| SAY("...... skipping\n"); |
| continue; |
| } |
| wMaxPacketSize = le16_to_cpu(pepd->wMaxPacketSize); |
| bEndpointAddress = pepd->bEndpointAddress; |
| |
| JOT(4, "intf[%i]alt[%i]end[%i]: bEndpointAddress=0x%X\n", \ |
| bInterfaceNumber, i, j, \ |
| pepd->bEndpointAddress); |
| JOT(4, "intf[%i]alt[%i]end[%i]: bmAttributes=0x%X\n", \ |
| bInterfaceNumber, i, j, \ |
| pepd->bmAttributes); |
| JOT(4, "intf[%i]alt[%i]end[%i]: wMaxPacketSize=%i\n", \ |
| bInterfaceNumber, i, j, \ |
| pepd->wMaxPacketSize); |
| JOT(4, "intf[%i]alt[%i]end[%i]: bInterval=%i\n", |
| bInterfaceNumber, i, j, \ |
| pepd->bInterval); |
| |
| if (pepd->bEndpointAddress & USB_DIR_IN) { |
| JOT(4, "intf[%i]alt[%i]end[%i] is an IN endpoint\n",\ |
| bInterfaceNumber, i, j); |
| isin = 1; |
| } else { |
| JOT(4, "intf[%i]alt[%i]end[%i] is an OUT endpoint\n",\ |
| bInterfaceNumber, i, j); |
| SAY("ERROR: OUT endpoint unexpected\n"); |
| SAY("...... continuing\n"); |
| isin = 0; |
| } |
| if ((pepd->bmAttributes & \ |
| USB_ENDPOINT_XFERTYPE_MASK) == \ |
| USB_ENDPOINT_XFER_ISOC) { |
| JOT(4, "intf[%i]alt[%i]end[%i] is an ISOC endpoint\n",\ |
| bInterfaceNumber, i, j); |
| if (isin) { |
| switch (bInterfaceClass) { |
| case USB_CLASS_VIDEO: |
| case USB_CLASS_VENDOR_SPEC: { |
| if (!peasycap) { |
| SAY("MISTAKE: " \ |
| "peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| if (pepd->wMaxPacketSize) { |
| if (8 > isokalt) { |
| okalt[isokalt] = i; |
| JOT(4,\ |
| "%i=okalt[%i]\n", \ |
| okalt[isokalt], \ |
| isokalt); |
| isokalt++; |
| } |
| if (8 > isokepn) { |
| okepn[isokepn] = \ |
| pepd->\ |
| bEndpointAddress & \ |
| 0x0F; |
| JOT(4,\ |
| "%i=okepn[%i]\n", \ |
| okepn[isokepn], \ |
| isokepn); |
| isokepn++; |
| } |
| if (8 > isokmps) { |
| okmps[isokmps] = \ |
| le16_to_cpu(pepd->\ |
| wMaxPacketSize); |
| JOT(4,\ |
| "%i=okmps[%i]\n", \ |
| okmps[isokmps], \ |
| isokmps); |
| isokmps++; |
| } |
| } else { |
| if (-1 == peasycap->\ |
| video_altsetting_off) { |
| peasycap->\ |
| video_altsetting_off =\ |
| i; |
| JOT(4, "%i=video_" \ |
| "altsetting_off " \ |
| "<====\n", \ |
| peasycap->\ |
| video_altsetting_off); |
| } else { |
| SAY("ERROR: peasycap" \ |
| "->video_altsetting_" \ |
| "off already set\n"); |
| SAY("...... " \ |
| "continuing with " \ |
| "%i=peasycap->video_" \ |
| "altsetting_off\n", \ |
| peasycap->\ |
| video_altsetting_off); |
| } |
| } |
| break; |
| } |
| case USB_CLASS_AUDIO: { |
| if (0x02 != bInterfaceSubClass) |
| break; |
| if (!peasycap) { |
| SAY("MISTAKE: " \ |
| "peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| if (pepd->wMaxPacketSize) { |
| if (8 > isokalt) { |
| okalt[isokalt] = i ; |
| JOT(4,\ |
| "%i=okalt[%i]\n", \ |
| okalt[isokalt], \ |
| isokalt); |
| isokalt++; |
| } |
| if (8 > isokepn) { |
| okepn[isokepn] = \ |
| pepd->\ |
| bEndpointAddress & \ |
| 0x0F; |
| JOT(4,\ |
| "%i=okepn[%i]\n", \ |
| okepn[isokepn], \ |
| isokepn); |
| isokepn++; |
| } |
| if (8 > isokmps) { |
| okmps[isokmps] = \ |
| le16_to_cpu(pepd->\ |
| wMaxPacketSize); |
| JOT(4,\ |
| "%i=okmps[%i]\n",\ |
| okmps[isokmps], \ |
| isokmps); |
| isokmps++; |
| } |
| } else { |
| if (-1 == peasycap->\ |
| audio_altsetting_off) { |
| peasycap->\ |
| audio_altsetting_off =\ |
| i; |
| JOT(4, "%i=audio_" \ |
| "altsetting_off " \ |
| "<====\n", \ |
| peasycap->\ |
| audio_altsetting_off); |
| } else { |
| SAY("ERROR: peasycap" \ |
| "->audio_altsetting_" \ |
| "off already set\n"); |
| SAY("...... " \ |
| "continuing with " \ |
| "%i=peasycap->\ |
| audio_altsetting_" \ |
| "off\n", |
| peasycap->\ |
| audio_altsetting_off); |
| } |
| } |
| break; |
| } |
| default: |
| break; |
| } |
| } |
| } else if ((pepd->bmAttributes & \ |
| USB_ENDPOINT_XFERTYPE_MASK) ==\ |
| USB_ENDPOINT_XFER_BULK) { |
| JOT(4, "intf[%i]alt[%i]end[%i] is a BULK endpoint\n",\ |
| bInterfaceNumber, i, j); |
| } else if ((pepd->bmAttributes & \ |
| USB_ENDPOINT_XFERTYPE_MASK) ==\ |
| USB_ENDPOINT_XFER_INT) { |
| JOT(4, "intf[%i]alt[%i]end[%i] is an INT endpoint\n",\ |
| bInterfaceNumber, i, j); |
| } else { |
| JOT(4, "intf[%i]alt[%i]end[%i] is a CTRL endpoint\n",\ |
| bInterfaceNumber, i, j); |
| } |
| if (0 == pepd->wMaxPacketSize) { |
| JOT(4, "intf[%i]alt[%i]end[%i] " \ |
| "has zero packet size\n", \ |
| bInterfaceNumber, i, j); |
| } |
| } |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * PERFORM INITIALIZATION OF THE PROBED INTERFACE |
| */ |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "initialization begins for interface %i\n", \ |
| pusb_interface_descriptor->bInterfaceNumber); |
| switch (bInterfaceNumber) { |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * INTERFACE 0 IS THE VIDEO INTERFACE |
| */ |
| /*---------------------------------------------------------------------------*/ |
| case 0: { |
| if (!peasycap) { |
| SAY("MISTAKE: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| if (!isokalt) { |
| SAY("ERROR: no viable video_altsetting_on\n"); |
| return -ENOENT; |
| } else { |
| peasycap->video_altsetting_on = okalt[isokalt - 1]; |
| JOT(4, "%i=video_altsetting_on <====\n", \ |
| peasycap->video_altsetting_on); |
| } |
| if (!isokepn) { |
| SAY("ERROR: no viable video_endpointnumber\n"); |
| return -ENOENT; |
| } else { |
| peasycap->video_endpointnumber = okepn[isokepn - 1]; |
| JOT(4, "%i=video_endpointnumber\n", \ |
| peasycap->video_endpointnumber); |
| } |
| if (!isokmps) { |
| SAY("ERROR: no viable video_maxpacketsize\n"); |
| return -ENOENT; |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * DECIDE THE VIDEO STREAMING PARAMETERS |
| */ |
| /*---------------------------------------------------------------------------*/ |
| } else { |
| maxpacketsize = okmps[isokmps - 1] - 1024; |
| if (USB_2_0_MAXPACKETSIZE > maxpacketsize) { |
| peasycap->video_isoc_maxframesize = maxpacketsize; |
| } else { |
| peasycap->video_isoc_maxframesize = \ |
| USB_2_0_MAXPACKETSIZE; |
| } |
| JOT(4, "%i=video_isoc_maxframesize\n", \ |
| peasycap->video_isoc_maxframesize); |
| if (0 >= peasycap->video_isoc_maxframesize) { |
| SAY("ERROR: bad video_isoc_maxframesize\n"); |
| return -ENOENT; |
| } |
| peasycap->video_isoc_framesperdesc = VIDEO_ISOC_FRAMESPERDESC; |
| JOT(4, "%i=video_isoc_framesperdesc\n", \ |
| peasycap->video_isoc_framesperdesc); |
| if (0 >= peasycap->video_isoc_framesperdesc) { |
| SAY("ERROR: bad video_isoc_framesperdesc\n"); |
| return -ENOENT; |
| } |
| peasycap->video_isoc_buffer_size = \ |
| peasycap->video_isoc_maxframesize * \ |
| peasycap->video_isoc_framesperdesc; |
| JOT(4, "%i=video_isoc_buffer_size\n", \ |
| peasycap->video_isoc_buffer_size); |
| if ((PAGE_SIZE << VIDEO_ISOC_ORDER) < \ |
| peasycap->video_isoc_buffer_size) { |
| SAY("MISTAKE: " \ |
| "peasycap->video_isoc_buffer_size too big\n"); |
| return -EFAULT; |
| } |
| } |
| /*---------------------------------------------------------------------------*/ |
| if (-1 == peasycap->video_interface) { |
| SAY("MISTAKE: video_interface is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->video_altsetting_on) { |
| SAY("MISTAKE: video_altsetting_on is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->video_altsetting_off) { |
| SAY("MISTAKE: video_interface_off is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->video_endpointnumber) { |
| SAY("MISTAKE: video_endpointnumber is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->video_isoc_maxframesize) { |
| SAY("MISTAKE: video_isoc_maxframesize is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->video_isoc_buffer_size) { |
| SAY("MISTAKE: video_isoc_buffer_size is unset\n"); |
| return -EFAULT; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * ALLOCATE MEMORY FOR VIDEO BUFFERS. LISTS MUST BE INITIALIZED FIRST. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| INIT_LIST_HEAD(&(peasycap->urb_video_head)); |
| peasycap->purb_video_head = &(peasycap->urb_video_head); |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "allocating %i frame buffers of size %li\n", \ |
| FRAME_BUFFER_MANY, (long int)FRAME_BUFFER_SIZE); |
| JOT(4, ".... each scattered over %li pages\n", \ |
| FRAME_BUFFER_SIZE/PAGE_SIZE); |
| |
| for (k = 0; k < FRAME_BUFFER_MANY; k++) { |
| for (m = 0; m < FRAME_BUFFER_SIZE/PAGE_SIZE; m++) { |
| if ((void *)NULL != peasycap->frame_buffer[k][m].pgo) |
| SAY("attempting to reallocate frame " \ |
| " buffers\n"); |
| else { |
| pbuf = (void *)__get_free_page(GFP_KERNEL); |
| if ((void *)NULL == pbuf) { |
| SAY("ERROR: Could not allocate frame "\ |
| "buffer %i page %i\n", k, m); |
| return -ENOMEM; |
| } else |
| peasycap->allocation_video_page += 1; |
| peasycap->frame_buffer[k][m].pgo = pbuf; |
| } |
| peasycap->frame_buffer[k][m].pto = \ |
| peasycap->frame_buffer[k][m].pgo; |
| } |
| } |
| |
| peasycap->frame_fill = 0; |
| peasycap->frame_read = 0; |
| JOT(4, "allocation of frame buffers done: %i pages\n", k * \ |
| m); |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "allocating %i field buffers of size %li\n", \ |
| FIELD_BUFFER_MANY, (long int)FIELD_BUFFER_SIZE); |
| JOT(4, ".... each scattered over %li pages\n", \ |
| FIELD_BUFFER_SIZE/PAGE_SIZE); |
| |
| for (k = 0; k < FIELD_BUFFER_MANY; k++) { |
| for (m = 0; m < FIELD_BUFFER_SIZE/PAGE_SIZE; m++) { |
| if ((void *)NULL != peasycap->field_buffer[k][m].pgo) { |
| SAY("ERROR: attempting to reallocate " \ |
| "field buffers\n"); |
| } else { |
| pbuf = (void *) __get_free_page(GFP_KERNEL); |
| if ((void *)NULL == pbuf) { |
| SAY("ERROR: Could not allocate field" \ |
| " buffer %i page %i\n", k, m); |
| return -ENOMEM; |
| } |
| else |
| peasycap->allocation_video_page += 1; |
| peasycap->field_buffer[k][m].pgo = pbuf; |
| } |
| peasycap->field_buffer[k][m].pto = \ |
| peasycap->field_buffer[k][m].pgo; |
| } |
| peasycap->field_buffer[k][0].kount = 0x0200; |
| } |
| peasycap->field_fill = 0; |
| peasycap->field_page = 0; |
| peasycap->field_read = 0; |
| JOT(4, "allocation of field buffers done: %i pages\n", k * \ |
| m); |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "allocating %i isoc video buffers of size %i\n", \ |
| VIDEO_ISOC_BUFFER_MANY, \ |
| peasycap->video_isoc_buffer_size); |
| JOT(4, ".... each occupying contiguous memory pages\n"); |
| |
| for (k = 0; k < VIDEO_ISOC_BUFFER_MANY; k++) { |
| pbuf = (void *)__get_free_pages(GFP_KERNEL, VIDEO_ISOC_ORDER); |
| if (NULL == pbuf) { |
| SAY("ERROR: Could not allocate isoc video buffer " \ |
| "%i\n", k); |
| return -ENOMEM; |
| } else |
| peasycap->allocation_video_page += \ |
| ((unsigned int)(0x01 << VIDEO_ISOC_ORDER)); |
| |
| peasycap->video_isoc_buffer[k].pgo = pbuf; |
| peasycap->video_isoc_buffer[k].pto = pbuf + \ |
| peasycap->video_isoc_buffer_size; |
| peasycap->video_isoc_buffer[k].kount = k; |
| } |
| JOT(4, "allocation of isoc video buffers done: %i pages\n", \ |
| k * (0x01 << VIDEO_ISOC_ORDER)); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * ALLOCATE AND INITIALIZE MULTIPLE struct urb ... |
| */ |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "allocating %i struct urb.\n", VIDEO_ISOC_BUFFER_MANY); |
| JOT(4, "using %i=peasycap->video_isoc_framesperdesc\n", \ |
| peasycap->video_isoc_framesperdesc); |
| JOT(4, "using %i=peasycap->video_isoc_maxframesize\n", \ |
| peasycap->video_isoc_maxframesize); |
| JOT(4, "using %i=peasycap->video_isoc_buffer_sizen", \ |
| peasycap->video_isoc_buffer_size); |
| |
| for (k = 0; k < VIDEO_ISOC_BUFFER_MANY; k++) { |
| purb = usb_alloc_urb(peasycap->video_isoc_framesperdesc, \ |
| GFP_KERNEL); |
| if (NULL == purb) { |
| SAY("ERROR: usb_alloc_urb returned NULL for buffer " \ |
| "%i\n", k); |
| return -ENOMEM; |
| } else |
| peasycap->allocation_video_urb += 1; |
| /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
| pdata_urb = kzalloc(sizeof(struct data_urb), GFP_KERNEL); |
| if (NULL == pdata_urb) { |
| SAY("ERROR: Could not allocate struct data_urb.\n"); |
| return -ENOMEM; |
| } else |
| peasycap->allocation_video_struct += \ |
| sizeof(struct data_urb); |
| |
| pdata_urb->purb = purb; |
| pdata_urb->isbuf = k; |
| pdata_urb->length = 0; |
| list_add_tail(&(pdata_urb->list_head), \ |
| peasycap->purb_video_head); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * ... AND INITIALIZE THEM |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (!k) { |
| JOT(4, "initializing video urbs thus:\n"); |
| JOT(4, " purb->interval = 1;\n"); |
| JOT(4, " purb->dev = peasycap->pusb_device;\n"); |
| JOT(4, " purb->pipe = usb_rcvisocpipe" \ |
| "(peasycap->pusb_device,%i);\n", \ |
| peasycap->video_endpointnumber); |
| JOT(4, " purb->transfer_flags = URB_ISO_ASAP;\n"); |
| JOT(4, " purb->transfer_buffer = peasycap->" \ |
| "video_isoc_buffer[.].pgo;\n"); |
| JOT(4, " purb->transfer_buffer_length = %i;\n", \ |
| peasycap->video_isoc_buffer_size); |
| JOT(4, " purb->complete = easycap_complete;\n"); |
| JOT(4, " purb->context = peasycap;\n"); |
| JOT(4, " purb->start_frame = 0;\n"); |
| JOT(4, " purb->number_of_packets = %i;\n", \ |
| peasycap->video_isoc_framesperdesc); |
| JOT(4, " for (j = 0; j < %i; j++)\n", \ |
| peasycap->video_isoc_framesperdesc); |
| JOT(4, " {\n"); |
| JOT(4, " purb->iso_frame_desc[j].offset = j*%i;\n",\ |
| peasycap->video_isoc_maxframesize); |
| JOT(4, " purb->iso_frame_desc[j].length = %i;\n", \ |
| peasycap->video_isoc_maxframesize); |
| JOT(4, " }\n"); |
| } |
| |
| purb->interval = 1; |
| purb->dev = peasycap->pusb_device; |
| purb->pipe = usb_rcvisocpipe(peasycap->pusb_device, \ |
| peasycap->video_endpointnumber); |
| purb->transfer_flags = URB_ISO_ASAP; |
| purb->transfer_buffer = peasycap->video_isoc_buffer[k].pgo; |
| purb->transfer_buffer_length = \ |
| peasycap->video_isoc_buffer_size; |
| purb->complete = easycap_complete; |
| purb->context = peasycap; |
| purb->start_frame = 0; |
| purb->number_of_packets = peasycap->video_isoc_framesperdesc; |
| for (j = 0; j < peasycap->video_isoc_framesperdesc; j++) { |
| purb->iso_frame_desc[j].offset = j * \ |
| peasycap->video_isoc_maxframesize; |
| purb->iso_frame_desc[j].length = \ |
| peasycap->video_isoc_maxframesize; |
| } |
| } |
| JOT(4, "allocation of %i struct urb done.\n", k); |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * SAVE POINTER peasycap IN THIS INTERFACE. |
| */ |
| /*--------------------------------------------------------------------------*/ |
| usb_set_intfdata(pusb_interface, peasycap); |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * THE VIDEO DEVICE CAN BE REGISTERED NOW, AS IT IS READY. |
| */ |
| /*--------------------------------------------------------------------------*/ |
| #if (!defined(EASYCAP_IS_VIDEODEV_CLIENT)) |
| if (0 != (usb_register_dev(pusb_interface, &easycap_class))) { |
| err("Not able to get a minor for this device"); |
| usb_set_intfdata(pusb_interface, NULL); |
| return -ENODEV; |
| } else |
| (peasycap->registered_video)++; |
| SAY("easycap attached to minor #%d\n", pusb_interface->minor); |
| break; |
| /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/ |
| #else |
| pvideo_device = (struct video_device *)\ |
| kzalloc(sizeof(struct video_device), GFP_KERNEL); |
| if ((struct video_device *)NULL == pvideo_device) { |
| SAY("ERROR: Could not allocate structure video_device\n"); |
| return -ENOMEM; |
| } |
| if (VIDEO_DEVICE_MANY <= video_device_many) { |
| SAY("ERROR: Too many /dev/videos\n"); |
| return -ENOMEM; |
| } |
| pvideo_array[video_device_many] = pvideo_device; video_device_many++; |
| |
| strcpy(&pvideo_device->name[0], "easycapdc60"); |
| #if defined(EASYCAP_NEEDS_V4L2_FOPS) |
| pvideo_device->fops = &v4l2_fops; |
| #else |
| pvideo_device->fops = &easycap_fops; |
| #endif /*EASYCAP_NEEDS_V4L2_FOPS*/ |
| pvideo_device->minor = -1; |
| pvideo_device->release = (void *)(&videodev_release); |
| |
| video_set_drvdata(pvideo_device, (void *)peasycap); |
| |
| rc = video_register_device(pvideo_device, VFL_TYPE_GRABBER, -1); |
| if (0 != rc) { |
| err("Not able to register with videodev"); |
| videodev_release(pvideo_device); |
| return -ENODEV; |
| } else { |
| peasycap->pvideo_device = pvideo_device; |
| (peasycap->registered_video)++; |
| JOT(4, "registered with videodev: %i=minor\n", \ |
| pvideo_device->minor); |
| } |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/ |
| break; |
| } |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * INTERFACE 1 IS THE AUDIO CONTROL INTERFACE |
| * INTERFACE 2 IS THE AUDIO STREAMING INTERFACE |
| */ |
| /*--------------------------------------------------------------------------*/ |
| case 1: { |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * SAVE POINTER peasycap IN INTERFACE 1 |
| */ |
| /*--------------------------------------------------------------------------*/ |
| usb_set_intfdata(pusb_interface, peasycap); |
| JOT(4, "no initialization required for interface %i\n", \ |
| pusb_interface_descriptor->bInterfaceNumber); |
| break; |
| } |
| /*--------------------------------------------------------------------------*/ |
| case 2: { |
| if (!peasycap) { |
| SAY("MISTAKE: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| if (!isokalt) { |
| SAY("ERROR: no viable audio_altsetting_on\n"); |
| return -ENOENT; |
| } else { |
| peasycap->audio_altsetting_on = okalt[isokalt - 1]; |
| JOT(4, "%i=audio_altsetting_on <====\n", \ |
| peasycap->audio_altsetting_on); |
| } |
| if (!isokepn) { |
| SAY("ERROR: no viable audio_endpointnumber\n"); |
| return -ENOENT; |
| } else { |
| peasycap->audio_endpointnumber = okepn[isokepn - 1]; |
| JOT(4, "%i=audio_endpointnumber\n", \ |
| peasycap->audio_endpointnumber); |
| } |
| if (!isokmps) { |
| SAY("ERROR: no viable audio_maxpacketsize\n"); |
| return -ENOENT; |
| } else { |
| peasycap->audio_isoc_maxframesize = okmps[isokmps - 1]; |
| JOT(4, "%i=audio_isoc_maxframesize\n", \ |
| peasycap->audio_isoc_maxframesize); |
| if (0 >= peasycap->audio_isoc_maxframesize) { |
| SAY("ERROR: bad audio_isoc_maxframesize\n"); |
| return -ENOENT; |
| } |
| if (9 == peasycap->audio_isoc_maxframesize) { |
| peasycap->ilk |= 0x02; |
| SAY("hardware is FOUR-CVBS\n"); |
| peasycap->microphone = true; |
| peasycap->audio_pages_per_fragment = 4; |
| } else if (256 == peasycap->audio_isoc_maxframesize) { |
| peasycap->ilk &= ~0x02; |
| SAY("hardware is CVBS+S-VIDEO\n"); |
| peasycap->microphone = false; |
| peasycap->audio_pages_per_fragment = 4; |
| } else { |
| SAY("hardware is unidentified:\n"); |
| SAY("%i=audio_isoc_maxframesize\n", \ |
| peasycap->audio_isoc_maxframesize); |
| return -ENOENT; |
| } |
| |
| peasycap->audio_bytes_per_fragment = \ |
| peasycap->audio_pages_per_fragment * \ |
| PAGE_SIZE ; |
| peasycap->audio_buffer_page_many = (AUDIO_FRAGMENT_MANY * \ |
| peasycap->audio_pages_per_fragment); |
| |
| JOT(4, "%6i=AUDIO_FRAGMENT_MANY\n", AUDIO_FRAGMENT_MANY); |
| JOT(4, "%6i=audio_pages_per_fragment\n", \ |
| peasycap->audio_pages_per_fragment); |
| JOT(4, "%6i=audio_bytes_per_fragment\n", \ |
| peasycap->audio_bytes_per_fragment); |
| JOT(4, "%6i=audio_buffer_page_many\n", \ |
| peasycap->audio_buffer_page_many); |
| |
| peasycap->audio_isoc_framesperdesc = 128; |
| |
| JOT(4, "%i=audio_isoc_framesperdesc\n", \ |
| peasycap->audio_isoc_framesperdesc); |
| if (0 >= peasycap->audio_isoc_framesperdesc) { |
| SAY("ERROR: bad audio_isoc_framesperdesc\n"); |
| return -ENOENT; |
| } |
| |
| peasycap->audio_isoc_buffer_size = \ |
| peasycap->audio_isoc_maxframesize * \ |
| peasycap->audio_isoc_framesperdesc; |
| JOT(4, "%i=audio_isoc_buffer_size\n", \ |
| peasycap->audio_isoc_buffer_size); |
| if (AUDIO_ISOC_BUFFER_SIZE < \ |
| peasycap->audio_isoc_buffer_size) { |
| SAY("MISTAKE: audio_isoc_buffer_size bigger " |
| "than %li=AUDIO_ISOC_BUFFER_SIZE\n", \ |
| AUDIO_ISOC_BUFFER_SIZE); |
| return -EFAULT; |
| } |
| } |
| |
| if (-1 == peasycap->audio_interface) { |
| SAY("MISTAKE: audio_interface is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->audio_altsetting_on) { |
| SAY("MISTAKE: audio_altsetting_on is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->audio_altsetting_off) { |
| SAY("MISTAKE: audio_interface_off is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->audio_endpointnumber) { |
| SAY("MISTAKE: audio_endpointnumber is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->audio_isoc_maxframesize) { |
| SAY("MISTAKE: audio_isoc_maxframesize is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->audio_isoc_buffer_size) { |
| SAY("MISTAKE: audio_isoc_buffer_size is unset\n"); |
| return -EFAULT; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * ALLOCATE MEMORY FOR AUDIO BUFFERS. LISTS MUST BE INITIALIZED FIRST. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| INIT_LIST_HEAD(&(peasycap->urb_audio_head)); |
| peasycap->purb_audio_head = &(peasycap->urb_audio_head); |
| |
| JOT(4, "allocating an audio buffer\n"); |
| JOT(4, ".... scattered over %i pages\n", \ |
| peasycap->audio_buffer_page_many); |
| |
| for (k = 0; k < peasycap->audio_buffer_page_many; k++) { |
| if ((void *)NULL != peasycap->audio_buffer[k].pgo) { |
| SAY("ERROR: attempting to reallocate audio buffers\n"); |
| } else { |
| pbuf = (void *) __get_free_page(GFP_KERNEL); |
| if ((void *)NULL == pbuf) { |
| SAY("ERROR: Could not allocate audio " \ |
| "buffer page %i\n", k); |
| return -ENOMEM; |
| } else |
| peasycap->allocation_audio_page += 1; |
| |
| peasycap->audio_buffer[k].pgo = pbuf; |
| } |
| peasycap->audio_buffer[k].pto = peasycap->audio_buffer[k].pgo; |
| } |
| |
| peasycap->audio_fill = 0; |
| peasycap->audio_read = 0; |
| JOT(4, "allocation of audio buffer done: %i pages\n", k); |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "allocating %i isoc audio buffers of size %i\n", \ |
| AUDIO_ISOC_BUFFER_MANY, peasycap->audio_isoc_buffer_size); |
| JOT(4, ".... each occupying contiguous memory pages\n"); |
| |
| for (k = 0; k < AUDIO_ISOC_BUFFER_MANY; k++) { |
| pbuf = (void *)__get_free_pages(GFP_KERNEL, AUDIO_ISOC_ORDER); |
| if (NULL == pbuf) { |
| SAY("ERROR: Could not allocate isoc audio buffer " \ |
| "%i\n", k); |
| return -ENOMEM; |
| } else |
| peasycap->allocation_audio_page += \ |
| ((unsigned int)(0x01 << AUDIO_ISOC_ORDER)); |
| |
| peasycap->audio_isoc_buffer[k].pgo = pbuf; |
| peasycap->audio_isoc_buffer[k].pto = pbuf + \ |
| peasycap->audio_isoc_buffer_size; |
| peasycap->audio_isoc_buffer[k].kount = k; |
| } |
| JOT(4, "allocation of isoc audio buffers done.\n"); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * ALLOCATE AND INITIALIZE MULTIPLE struct urb ... |
| */ |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "allocating %i struct urb.\n", AUDIO_ISOC_BUFFER_MANY); |
| JOT(4, "using %i=peasycap->audio_isoc_framesperdesc\n", \ |
| peasycap->audio_isoc_framesperdesc); |
| JOT(4, "using %i=peasycap->audio_isoc_maxframesize\n", \ |
| peasycap->audio_isoc_maxframesize); |
| JOT(4, "using %i=peasycap->audio_isoc_buffer_size\n", \ |
| peasycap->audio_isoc_buffer_size); |
| |
| for (k = 0; k < AUDIO_ISOC_BUFFER_MANY; k++) { |
| purb = usb_alloc_urb(peasycap->audio_isoc_framesperdesc, \ |
| GFP_KERNEL); |
| if (NULL == purb) { |
| SAY("ERROR: usb_alloc_urb returned NULL for buffer " \ |
| "%i\n", k); |
| return -ENOMEM; |
| } else |
| peasycap->allocation_audio_urb += 1 ; |
| /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
| pdata_urb = kzalloc(sizeof(struct data_urb), GFP_KERNEL); |
| if (NULL == pdata_urb) { |
| SAY("ERROR: Could not allocate struct data_urb.\n"); |
| return -ENOMEM; |
| } else |
| peasycap->allocation_audio_struct += \ |
| sizeof(struct data_urb); |
| |
| pdata_urb->purb = purb; |
| pdata_urb->isbuf = k; |
| pdata_urb->length = 0; |
| list_add_tail(&(pdata_urb->list_head), \ |
| peasycap->purb_audio_head); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * ... AND INITIALIZE THEM |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (!k) { |
| JOT(4, "initializing audio urbs thus:\n"); |
| JOT(4, " purb->interval = 1;\n"); |
| JOT(4, " purb->dev = peasycap->pusb_device;\n"); |
| JOT(4, " purb->pipe = usb_rcvisocpipe(peasycap->" \ |
| "pusb_device,%i);\n", \ |
| peasycap->audio_endpointnumber); |
| JOT(4, " purb->transfer_flags = URB_ISO_ASAP;\n"); |
| JOT(4, " purb->transfer_buffer = " \ |
| "peasycap->audio_isoc_buffer[.].pgo;\n"); |
| JOT(4, " purb->transfer_buffer_length = %i;\n", \ |
| peasycap->audio_isoc_buffer_size); |
| JOT(4, " purb->complete = easysnd_complete;\n"); |
| JOT(4, " purb->context = peasycap;\n"); |
| JOT(4, " purb->start_frame = 0;\n"); |
| JOT(4, " purb->number_of_packets = %i;\n", \ |
| peasycap->audio_isoc_framesperdesc); |
| JOT(4, " for (j = 0; j < %i; j++)\n", \ |
| peasycap->audio_isoc_framesperdesc); |
| JOT(4, " {\n"); |
| JOT(4, " purb->iso_frame_desc[j].offset = j*%i;\n",\ |
| peasycap->audio_isoc_maxframesize); |
| JOT(4, " purb->iso_frame_desc[j].length = %i;\n", \ |
| peasycap->audio_isoc_maxframesize); |
| JOT(4, " }\n"); |
| } |
| |
| purb->interval = 1; |
| purb->dev = peasycap->pusb_device; |
| purb->pipe = usb_rcvisocpipe(peasycap->pusb_device, \ |
| peasycap->audio_endpointnumber); |
| purb->transfer_flags = URB_ISO_ASAP; |
| purb->transfer_buffer = peasycap->audio_isoc_buffer[k].pgo; |
| purb->transfer_buffer_length = \ |
| peasycap->audio_isoc_buffer_size; |
| purb->complete = easysnd_complete; |
| purb->context = peasycap; |
| purb->start_frame = 0; |
| purb->number_of_packets = peasycap->audio_isoc_framesperdesc; |
| for (j = 0; j < peasycap->audio_isoc_framesperdesc; j++) { |
| purb->iso_frame_desc[j].offset = j * \ |
| peasycap->audio_isoc_maxframesize; |
| purb->iso_frame_desc[j].length = \ |
| peasycap->audio_isoc_maxframesize; |
| } |
| } |
| JOT(4, "allocation of %i struct urb done.\n", k); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * SAVE POINTER peasycap IN THIS INTERFACE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| usb_set_intfdata(pusb_interface, peasycap); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * THE AUDIO DEVICE CAN BE REGISTERED NOW, AS IT IS READY. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| rc = usb_register_dev(pusb_interface, &easysnd_class); |
| if (0 != rc) { |
| err("Not able to get a minor for this device."); |
| usb_set_intfdata(pusb_interface, NULL); |
| return -ENODEV; |
| } else |
| (peasycap->registered_audio)++; |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * LET THE USER KNOW WHAT NODE THE AUDIO DEVICE IS ATTACHED TO. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| SAY("easysnd attached to minor #%d\n", pusb_interface->minor); |
| break; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * INTERFACES OTHER THAN 0, 1 AND 2 ARE UNEXPECTED |
| */ |
| /*---------------------------------------------------------------------------*/ |
| default: { |
| JOT(4, "ERROR: unexpected interface %i\n", bInterfaceNumber); |
| return -EINVAL; |
| } |
| } |
| JOT(4, "ends successfully for interface %i\n", \ |
| pusb_interface_descriptor->bInterfaceNumber); |
| return 0; |
| } |
| /*****************************************************************************/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * WHEN THIS FUNCTION IS CALLED THE DEVICE HAS ALREADY BEEN PHYSICALLY |
| * UNPLUGGED. |
| * HENCE peasycap->pusb_device IS NO LONGER VALID AND MUST BE SET TO NULL. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| void |
| easycap_usb_disconnect(struct usb_interface *pusb_interface) |
| { |
| struct usb_host_interface *pusb_host_interface; |
| struct usb_interface_descriptor *pusb_interface_descriptor; |
| __u8 bInterfaceNumber; |
| struct easycap *peasycap; |
| |
| struct list_head *plist_head; |
| struct data_urb *pdata_urb; |
| int minor, m; |
| |
| JOT(4, "\n"); |
| |
| if ((struct usb_interface *)NULL == pusb_interface) { |
| JOT(4, "ERROR: pusb_interface is NULL\n"); |
| return; |
| } |
| pusb_host_interface = pusb_interface->cur_altsetting; |
| if ((struct usb_host_interface *)NULL == pusb_host_interface) { |
| JOT(4, "ERROR: pusb_host_interface is NULL\n"); |
| return; |
| } |
| pusb_interface_descriptor = &(pusb_host_interface->desc); |
| if ((struct usb_interface_descriptor *)NULL == pusb_interface_descriptor) { |
| JOT(4, "ERROR: pusb_interface_descriptor is NULL\n"); |
| return; |
| } |
| bInterfaceNumber = pusb_interface_descriptor->bInterfaceNumber; |
| minor = pusb_interface->minor; |
| JOT(4, "intf[%i]: minor=%i\n", bInterfaceNumber, minor); |
| |
| peasycap = usb_get_intfdata(pusb_interface); |
| if ((struct easycap *)NULL == peasycap) |
| SAY("ERROR: peasycap is NULL\n"); |
| else { |
| peasycap->pusb_device = (struct usb_device *)NULL; |
| switch (bInterfaceNumber) { |
| /*---------------------------------------------------------------------------*/ |
| case 0: { |
| if ((struct list_head *)NULL != peasycap->purb_video_head) { |
| JOT(4, "killing video urbs\n"); |
| m = 0; |
| list_for_each(plist_head, (peasycap->purb_video_head)) |
| { |
| pdata_urb = list_entry(plist_head, \ |
| struct data_urb, list_head); |
| if ((struct data_urb *)NULL != pdata_urb) { |
| if ((struct urb *)NULL != \ |
| pdata_urb->purb) { |
| usb_kill_urb(pdata_urb->purb); |
| m++; |
| } |
| } |
| } |
| JOT(4, "%i video urbs killed\n", m); |
| } else |
| SAY("ERROR: peasycap->purb_video_head is NULL\n"); |
| break; |
| } |
| /*---------------------------------------------------------------------------*/ |
| case 2: { |
| if ((struct list_head *)NULL != peasycap->purb_audio_head) { |
| JOT(4, "killing audio urbs\n"); |
| m = 0; |
| list_for_each(plist_head, \ |
| (peasycap->purb_audio_head)) { |
| pdata_urb = list_entry(plist_head, \ |
| struct data_urb, list_head); |
| if ((struct data_urb *)NULL != pdata_urb) { |
| if ((struct urb *)NULL != \ |
| pdata_urb->purb) { |
| usb_kill_urb(pdata_urb->purb); |
| m++; |
| } |
| } |
| } |
| JOT(4, "%i audio urbs killed\n", m); |
| } else |
| SAY("ERROR: peasycap->purb_audio_head is NULL\n"); |
| break; |
| } |
| /*---------------------------------------------------------------------------*/ |
| default: |
| break; |
| } |
| } |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * DEREGISTER |
| */ |
| /*--------------------------------------------------------------------------*/ |
| switch (bInterfaceNumber) { |
| case 0: { |
| #if (!defined(EASYCAP_IS_VIDEODEV_CLIENT)) |
| if ((struct easycap *)NULL == peasycap) { |
| SAY("ERROR: peasycap has become NULL\n"); |
| } else { |
| lock_kernel(); |
| usb_deregister_dev(pusb_interface, &easycap_class); |
| (peasycap->registered_video)--; |
| |
| JOT(4, "intf[%i]: usb_deregister_dev()\n", bInterfaceNumber); |
| unlock_kernel(); |
| SAY("easycap detached from minor #%d\n", minor); |
| } |
| /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/ |
| #else |
| if ((struct easycap *)NULL == peasycap) |
| SAY("ERROR: peasycap has become NULL\n"); |
| else { |
| lock_kernel(); |
| video_unregister_device(peasycap->pvideo_device); |
| (peasycap->registered_video)--; |
| unlock_kernel(); |
| JOT(4, "unregistered with videodev: %i=minor\n", \ |
| pvideo_device->minor); |
| } |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/ |
| break; |
| } |
| case 2: { |
| lock_kernel(); |
| |
| usb_deregister_dev(pusb_interface, &easysnd_class); |
| if ((struct easycap *)NULL != peasycap) |
| (peasycap->registered_audio)--; |
| |
| JOT(4, "intf[%i]: usb_deregister_dev()\n", bInterfaceNumber); |
| unlock_kernel(); |
| |
| SAY("easysnd detached from minor #%d\n", minor); |
| break; |
| } |
| default: |
| break; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * CALL easycap_delete() IF NO REMAINING REFERENCES TO peasycap |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if ((struct easycap *)NULL == peasycap) { |
| SAY("ERROR: peasycap has become NULL\n"); |
| SAY("cannot call kref_put()\n"); |
| SAY("ending unsuccessfully: may cause memory leak\n"); |
| return; |
| } |
| if (!peasycap->kref.refcount.counter) { |
| SAY("ERROR: peasycap->kref.refcount.counter is zero " \ |
| "so cannot call kref_put()\n"); |
| SAY("ending unsuccessfully: may cause memory leak\n"); |
| return; |
| } |
| JOT(4, "intf[%i]: kref_put() with %i=peasycap->kref.refcount.counter\n", \ |
| bInterfaceNumber, (int)peasycap->kref.refcount.counter); |
| kref_put(&peasycap->kref, easycap_delete); |
| JOT(4, "intf[%i]: kref_put() done.\n", bInterfaceNumber); |
| /*---------------------------------------------------------------------------*/ |
| |
| JOT(4, "ends\n"); |
| return; |
| } |
| /*****************************************************************************/ |
| int __init |
| easycap_module_init(void) |
| { |
| int result; |
| |
| SAY("========easycap=======\n"); |
| JOT(4, "begins. %i=debug\n", easycap_debug); |
| SAY("version: " EASYCAP_DRIVER_VERSION "\n"); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * REGISTER THIS DRIVER WITH THE USB SUBSYTEM. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| JOT(4, "registering driver easycap\n"); |
| |
| result = usb_register(&easycap_usb_driver); |
| if (0 != result) |
| SAY("ERROR: usb_register returned %i\n", result); |
| |
| JOT(4, "ends\n"); |
| return result; |
| } |
| /*****************************************************************************/ |
| void __exit |
| easycap_module_exit(void) |
| { |
| JOT(4, "begins\n"); |
| |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * DEREGISTER THIS DRIVER WITH THE USB SUBSYTEM. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| usb_deregister(&easycap_usb_driver); |
| |
| JOT(4, "ends\n"); |
| } |
| /*****************************************************************************/ |
| |
| module_init(easycap_module_init); |
| module_exit(easycap_module_exit); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("R.M. Thomas <rmthomas@sciolus.org>"); |
| MODULE_DESCRIPTION(EASYCAP_DRIVER_DESCRIPTION); |
| MODULE_VERSION(EASYCAP_DRIVER_VERSION); |
| #if defined(EASYCAP_DEBUG) |
| MODULE_PARM_DESC(easycap_debug, "debug: 0 (default), 1, 2,..."); |
| #endif /*EASYCAP_DEBUG*/ |
| /*****************************************************************************/ |