| /****************************************************************************** |
| * * |
| * 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 <linux/usb/audio.h> |
| |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("R.M. Thomas <rmthomas@sciolus.org>"); |
| MODULE_DESCRIPTION(EASYCAP_DRIVER_DESCRIPTION); |
| MODULE_VERSION(EASYCAP_DRIVER_VERSION); |
| |
| #ifdef CONFIG_EASYCAP_DEBUG |
| int easycap_debug; |
| module_param_named(debug, easycap_debug, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Debug level: 0(default),1,2,...,9"); |
| #endif /* CONFIG_EASYCAP_DEBUG */ |
| |
| bool easycap_readback; |
| module_param_named(readback, easycap_readback, bool, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(readback, "read back written registers: (default false)"); |
| |
| static int easycap_bars = 1; |
| module_param_named(bars, easycap_bars, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(bars, |
| "Testcard bars on input signal failure: 0=>no, 1=>yes(default)"); |
| |
| static int easycap_gain = 16; |
| module_param_named(gain, easycap_gain, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(gain, "Audio gain: 0,...,16(default),...31"); |
| |
| static bool easycap_ntsc; |
| module_param_named(ntsc, easycap_ntsc, bool, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(ntsc, "NTCS default encoding (default PAL)"); |
| |
| |
| |
| struct easycap_dongle easycapdc60_dongle[DONGLE_MANY]; |
| static struct mutex mutex_dongle; |
| static void easycap_complete(struct urb *purb); |
| static int reset(struct easycap *peasycap); |
| |
| const char *strerror(int err) |
| { |
| #define ERRNOSTR(_e) case _e: return # _e |
| switch (err) { |
| case 0: return "OK"; |
| ERRNOSTR(ENOMEM); |
| ERRNOSTR(ENODEV); |
| ERRNOSTR(ENXIO); |
| ERRNOSTR(EINVAL); |
| ERRNOSTR(EAGAIN); |
| ERRNOSTR(EFBIG); |
| ERRNOSTR(EPIPE); |
| ERRNOSTR(EMSGSIZE); |
| ERRNOSTR(ENOSPC); |
| ERRNOSTR(EINPROGRESS); |
| ERRNOSTR(ENOSR); |
| ERRNOSTR(EOVERFLOW); |
| ERRNOSTR(EPROTO); |
| ERRNOSTR(EILSEQ); |
| ERRNOSTR(ETIMEDOUT); |
| ERRNOSTR(EOPNOTSUPP); |
| ERRNOSTR(EPFNOSUPPORT); |
| ERRNOSTR(EAFNOSUPPORT); |
| ERRNOSTR(EADDRINUSE); |
| ERRNOSTR(EADDRNOTAVAIL); |
| ERRNOSTR(ENOBUFS); |
| ERRNOSTR(EISCONN); |
| ERRNOSTR(ENOTCONN); |
| ERRNOSTR(ESHUTDOWN); |
| ERRNOSTR(ENOENT); |
| ERRNOSTR(ECONNRESET); |
| ERRNOSTR(ETIME); |
| ERRNOSTR(ECOMM); |
| ERRNOSTR(EREMOTEIO); |
| ERRNOSTR(EXDEV); |
| ERRNOSTR(EPERM); |
| default: return "unknown"; |
| } |
| |
| #undef ERRNOSTR |
| } |
| |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * 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. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| /****************************************************************************/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * THIS ROUTINE DOES NOT DETECT DUPLICATE OCCURRENCES OF POINTER peasycap |
| */ |
| /*---------------------------------------------------------------------------*/ |
| int isdongle(struct easycap *peasycap) |
| { |
| int k; |
| if (!peasycap) |
| return -2; |
| for (k = 0; k < DONGLE_MANY; k++) { |
| if (easycapdc60_dongle[k].peasycap == peasycap) { |
| peasycap->isdongle = k; |
| return k; |
| } |
| } |
| return -1; |
| } |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| static int easycap_open(struct inode *inode, struct file *file) |
| { |
| struct video_device *pvideo_device; |
| struct easycap *peasycap; |
| int rc; |
| |
| JOT(4, "\n"); |
| SAY("==========OPEN=========\n"); |
| |
| pvideo_device = video_devdata(file); |
| if (!pvideo_device) { |
| SAY("ERROR: pvideo_device is NULL.\n"); |
| return -EFAULT; |
| } |
| peasycap = (struct easycap *)video_get_drvdata(pvideo_device); |
| if (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| if (!peasycap->pusb_device) { |
| SAM("ERROR: peasycap->pusb_device is NULL\n"); |
| return -EFAULT; |
| } else { |
| JOM(16, "peasycap->pusb_device=%p\n", peasycap->pusb_device); |
| } |
| file->private_data = peasycap; |
| rc = wakeup_device(peasycap->pusb_device); |
| if (0 == rc) |
| JOM(8, "wakeup_device() OK\n"); |
| else { |
| SAM("ERROR: wakeup_device() rc = %i\n", rc); |
| if (-ENODEV == rc) |
| SAM("ERROR: wakeup_device() returned -ENODEV\n"); |
| else |
| SAM("ERROR: wakeup_device() rc = %i\n", rc); |
| return rc; |
| } |
| peasycap->input = 0; |
| rc = reset(peasycap); |
| if (rc) { |
| SAM("ERROR: reset() rc = %i\n", rc); |
| return -EFAULT; |
| } |
| return 0; |
| } |
| |
| /*****************************************************************************/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * RESET THE HARDWARE TO ITS REFERENCE STATE. |
| * |
| * THIS ROUTINE MAY BE CALLED REPEATEDLY IF easycap_complete() DETECTS |
| * A BAD VIDEO FRAME SIZE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| static int reset(struct easycap *peasycap) |
| { |
| struct easycap_standard const *peasycap_standard; |
| int fmtidx, input, rate; |
| bool ntsc, other; |
| int rc; |
| |
| if (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| input = peasycap->input; |
| |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * IF THE SAA7113H HAS ALREADY ACQUIRED SYNC, USE ITS HARDWARE-DETECTED |
| * FIELD FREQUENCY TO DISTINGUISH NTSC FROM PAL. THIS IS ESSENTIAL FOR |
| * gstreamer AND OTHER USERSPACE PROGRAMS WHICH MAY NOT ATTEMPT TO INITIATE |
| * A SWITCH BETWEEN PAL AND NTSC. |
| * |
| * FUNCTION ready_saa() MAY REQUIRE A SUBSTANTIAL FRACTION OF A SECOND TO |
| * COMPLETE, SO SHOULD NOT BE INVOKED WITHOUT GOOD REASON. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| other = false; |
| JOM(8, "peasycap->ntsc=%d\n", peasycap->ntsc); |
| |
| rate = ready_saa(peasycap->pusb_device); |
| if (rate < 0) { |
| JOM(8, "not ready to capture after %i ms ...\n", PATIENCE); |
| ntsc = !peasycap->ntsc; |
| JOM(8, "... trying %s ..\n", ntsc ? "NTSC" : "PAL"); |
| rc = setup_stk(peasycap->pusb_device, ntsc); |
| if (rc) { |
| SAM("ERROR: setup_stk() rc = %i\n", rc); |
| return -EFAULT; |
| } |
| rc = setup_saa(peasycap->pusb_device, ntsc); |
| if (rc) { |
| SAM("ERROR: setup_saa() rc = %i\n", rc); |
| return -EFAULT; |
| } |
| |
| rate = ready_saa(peasycap->pusb_device); |
| if (rate < 0) { |
| JOM(8, "not ready to capture after %i ms\n", PATIENCE); |
| JOM(8, "... saa register 0x1F has 0x%02X\n", |
| read_saa(peasycap->pusb_device, 0x1F)); |
| ntsc = peasycap->ntsc; |
| } else { |
| JOM(8, "... success at second try: %i=rate\n", rate); |
| ntsc = (0 < (rate/2)) ? true : false ; |
| other = true; |
| } |
| } else { |
| JOM(8, "... success at first try: %i=rate\n", rate); |
| ntsc = (0 < rate/2) ? true : false ; |
| } |
| JOM(8, "ntsc=%d\n", ntsc); |
| /*---------------------------------------------------------------------------*/ |
| |
| rc = setup_stk(peasycap->pusb_device, ntsc); |
| if (rc) { |
| SAM("ERROR: setup_stk() rc = %i\n", rc); |
| return -EFAULT; |
| } |
| rc = setup_saa(peasycap->pusb_device, ntsc); |
| if (rc) { |
| SAM("ERROR: setup_saa() rc = %i\n", rc); |
| return -EFAULT; |
| } |
| |
| memset(peasycap->merit, 0, sizeof(peasycap->merit)); |
| |
| peasycap->video_eof = 0; |
| peasycap->audio_eof = 0; |
| do_gettimeofday(&peasycap->timeval7); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * RESTORE INPUT AND FORCE REFRESH OF STANDARD, FORMAT, ETC. |
| * |
| * WHILE THIS PROCEDURE IS IN PROGRESS, SOME IOCTL COMMANDS WILL RETURN -EBUSY. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| peasycap->input = -8192; |
| peasycap->standard_offset = -8192; |
| fmtidx = ntsc ? NTSC_M : PAL_BGHIN; |
| if (other) { |
| peasycap_standard = &easycap_standard[0]; |
| while (0xFFFF != peasycap_standard->mask) { |
| if (fmtidx == peasycap_standard->v4l2_standard.index) { |
| peasycap->inputset[input].standard_offset = |
| peasycap_standard - easycap_standard; |
| break; |
| } |
| peasycap_standard++; |
| } |
| if (0xFFFF == peasycap_standard->mask) { |
| SAM("ERROR: standard not found\n"); |
| return -EINVAL; |
| } |
| JOM(8, "%i=peasycap->inputset[%i].standard_offset\n", |
| peasycap->inputset[input].standard_offset, input); |
| } |
| peasycap->format_offset = -8192; |
| peasycap->brightness = -8192; |
| peasycap->contrast = -8192; |
| peasycap->saturation = -8192; |
| peasycap->hue = -8192; |
| |
| rc = newinput(peasycap, input); |
| |
| if (rc) { |
| SAM("ERROR: newinput(.,%i) rc = %i\n", rc, input); |
| return -EFAULT; |
| } |
| JOM(4, "restored input, standard and format\n"); |
| |
| JOM(8, "true=peasycap->ntsc %d\n", peasycap->ntsc); |
| |
| if (0 > peasycap->input) { |
| SAM("MISTAKE: %i=peasycap->input\n", peasycap->input); |
| return -ENOENT; |
| } |
| if (0 > peasycap->standard_offset) { |
| SAM("MISTAKE: %i=peasycap->standard_offset\n", |
| peasycap->standard_offset); |
| return -ENOENT; |
| } |
| if (0 > peasycap->format_offset) { |
| SAM("MISTAKE: %i=peasycap->format_offset\n", |
| peasycap->format_offset); |
| return -ENOENT; |
| } |
| if (0 > peasycap->brightness) { |
| SAM("MISTAKE: %i=peasycap->brightness\n", |
| peasycap->brightness); |
| return -ENOENT; |
| } |
| if (0 > peasycap->contrast) { |
| SAM("MISTAKE: %i=peasycap->contrast\n", peasycap->contrast); |
| return -ENOENT; |
| } |
| if (0 > peasycap->saturation) { |
| SAM("MISTAKE: %i=peasycap->saturation\n", |
| peasycap->saturation); |
| return -ENOENT; |
| } |
| if (0 > peasycap->hue) { |
| SAM("MISTAKE: %i=peasycap->hue\n", peasycap->hue); |
| return -ENOENT; |
| } |
| return 0; |
| } |
| /*****************************************************************************/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * IF THE REQUESTED INPUT IS THE SAME AS THE EXISTING INPUT, DO NOTHING. |
| * OTHERWISE: |
| * KILL URBS, CLEAR FIELD AND FRAME BUFFERS AND RESET THEIR |
| * _read AND _fill POINTERS. |
| * SELECT THE NEW INPUT. |
| * ADJUST THE STANDARD, FORMAT, BRIGHTNESS, CONTRAST, SATURATION AND HUE |
| * ON THE BASIS OF INFORMATION IN STRUCTURE easycap.inputset[input]. |
| * RESUBMIT THE URBS IF STREAMING WAS ALREADY IN PROGRESS. |
| * |
| * NOTE: |
| * THIS ROUTINE MAY BE CALLED FREQUENTLY BY ZONEMINDER VIA IOCTL, |
| * SO IT SHOULD WRITE ONLY SPARINGLY TO THE LOGFILE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| int |
| newinput(struct easycap *peasycap, int input) |
| { |
| int rc, k, m, mood, off; |
| int inputnow, video_idlenow, audio_idlenow; |
| bool resubmit; |
| |
| if (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| JOM(8, "%i=input sought\n", input); |
| |
| if (0 > input && INPUT_MANY <= input) |
| return -ENOENT; |
| inputnow = peasycap->input; |
| if (input == inputnow) |
| return 0; |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * IF STREAMING IS IN PROGRESS THE URBS ARE KILLED AT THIS |
| * STAGE AND WILL BE RESUBMITTED PRIOR TO EXIT FROM THE ROUTINE. |
| * IF NO STREAMING IS IN PROGRESS NO URBS WILL BE SUBMITTED BY THE |
| * ROUTINE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| video_idlenow = peasycap->video_idle; |
| audio_idlenow = peasycap->audio_idle; |
| |
| peasycap->video_idle = 1; |
| peasycap->audio_idle = 1; |
| if (peasycap->video_isoc_streaming) { |
| resubmit = true; |
| kill_video_urbs(peasycap); |
| } else { |
| resubmit = false; |
| } |
| /*---------------------------------------------------------------------------*/ |
| if (!peasycap->pusb_device) { |
| SAM("ERROR: peasycap->pusb_device is NULL\n"); |
| return -ENODEV; |
| } |
| rc = usb_set_interface(peasycap->pusb_device, |
| peasycap->video_interface, |
| peasycap->video_altsetting_off); |
| if (rc) { |
| SAM("ERROR: usb_set_interface() rc = %i\n", rc); |
| return -EFAULT; |
| } |
| rc = stop_100(peasycap->pusb_device); |
| if (rc) { |
| SAM("ERROR: stop_100() rc = %i\n", rc); |
| return -EFAULT; |
| } |
| for (k = 0; k < FIELD_BUFFER_MANY; k++) { |
| for (m = 0; m < FIELD_BUFFER_SIZE/PAGE_SIZE; m++) |
| memset(peasycap->field_buffer[k][m].pgo, 0, PAGE_SIZE); |
| } |
| 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); |
| } |
| peasycap->field_page = 0; |
| peasycap->field_read = 0; |
| peasycap->field_fill = 0; |
| |
| peasycap->frame_read = 0; |
| peasycap->frame_fill = 0; |
| for (k = 0; k < peasycap->input; k++) { |
| (peasycap->frame_fill)++; |
| if (peasycap->frame_buffer_many <= peasycap->frame_fill) |
| peasycap->frame_fill = 0; |
| } |
| peasycap->input = input; |
| select_input(peasycap->pusb_device, peasycap->input, 9); |
| /*---------------------------------------------------------------------------*/ |
| if (input == peasycap->inputset[input].input) { |
| off = peasycap->inputset[input].standard_offset; |
| if (off != peasycap->standard_offset) { |
| rc = adjust_standard(peasycap, |
| easycap_standard[off].v4l2_standard.id); |
| if (rc) { |
| SAM("ERROR: adjust_standard() rc = %i\n", rc); |
| return -EFAULT; |
| } |
| JOM(8, "%i=peasycap->standard_offset\n", |
| peasycap->standard_offset); |
| } else { |
| JOM(8, "%i=peasycap->standard_offset unchanged\n", |
| peasycap->standard_offset); |
| } |
| off = peasycap->inputset[input].format_offset; |
| if (off != peasycap->format_offset) { |
| struct v4l2_pix_format *pix = |
| &easycap_format[off].v4l2_format.fmt.pix; |
| rc = adjust_format(peasycap, |
| pix->width, pix->height, |
| pix->pixelformat, pix->field, false); |
| if (0 > rc) { |
| SAM("ERROR: adjust_format() rc = %i\n", rc); |
| return -EFAULT; |
| } |
| JOM(8, "%i=peasycap->format_offset\n", |
| peasycap->format_offset); |
| } else { |
| JOM(8, "%i=peasycap->format_offset unchanged\n", |
| peasycap->format_offset); |
| } |
| mood = peasycap->inputset[input].brightness; |
| if (mood != peasycap->brightness) { |
| rc = adjust_brightness(peasycap, mood); |
| if (rc) { |
| SAM("ERROR: adjust_brightness rc = %i\n", rc); |
| return -EFAULT; |
| } |
| JOM(8, "%i=peasycap->brightness\n", |
| peasycap->brightness); |
| } |
| mood = peasycap->inputset[input].contrast; |
| if (mood != peasycap->contrast) { |
| rc = adjust_contrast(peasycap, mood); |
| if (rc) { |
| SAM("ERROR: adjust_contrast rc = %i\n", rc); |
| return -EFAULT; |
| } |
| JOM(8, "%i=peasycap->contrast\n", peasycap->contrast); |
| } |
| mood = peasycap->inputset[input].saturation; |
| if (mood != peasycap->saturation) { |
| rc = adjust_saturation(peasycap, mood); |
| if (rc) { |
| SAM("ERROR: adjust_saturation rc = %i\n", rc); |
| return -EFAULT; |
| } |
| JOM(8, "%i=peasycap->saturation\n", |
| peasycap->saturation); |
| } |
| mood = peasycap->inputset[input].hue; |
| if (mood != peasycap->hue) { |
| rc = adjust_hue(peasycap, mood); |
| if (rc) { |
| SAM("ERROR: adjust_hue rc = %i\n", rc); |
| return -EFAULT; |
| } |
| JOM(8, "%i=peasycap->hue\n", peasycap->hue); |
| } |
| } else { |
| SAM("MISTAKE: easycap.inputset[%i] unpopulated\n", input); |
| return -ENOENT; |
| } |
| /*---------------------------------------------------------------------------*/ |
| if (!peasycap->pusb_device) { |
| SAM("ERROR: peasycap->pusb_device is NULL\n"); |
| return -ENODEV; |
| } |
| rc = usb_set_interface(peasycap->pusb_device, |
| peasycap->video_interface, |
| peasycap->video_altsetting_on); |
| if (rc) { |
| SAM("ERROR: usb_set_interface() rc = %i\n", rc); |
| return -EFAULT; |
| } |
| rc = start_100(peasycap->pusb_device); |
| if (rc) { |
| SAM("ERROR: start_100() rc = %i\n", rc); |
| return -EFAULT; |
| } |
| if (resubmit) |
| submit_video_urbs(peasycap); |
| |
| peasycap->video_isoc_sequence = VIDEO_ISOC_BUFFER_MANY - 1; |
| peasycap->video_idle = video_idlenow; |
| peasycap->audio_idle = audio_idlenow; |
| peasycap->video_junk = 0; |
| |
| 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, nospc, m, rc; |
| int isbuf; |
| |
| if (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| |
| if (!peasycap->purb_video_head) { |
| SAY("ERROR: peasycap->urb_video_head uninitialized\n"); |
| return -EFAULT; |
| } |
| if (!peasycap->pusb_device) { |
| SAY("ERROR: peasycap->pusb_device is NULL\n"); |
| return -ENODEV; |
| } |
| if (!peasycap->video_isoc_streaming) { |
| JOM(4, "submission of all video urbs\n"); |
| isbad = 0; nospc = 0; m = 0; |
| list_for_each(plist_head, (peasycap->purb_video_head)) { |
| pdata_urb = list_entry(plist_head, |
| struct data_urb, list_head); |
| if (pdata_urb && pdata_urb->purb) { |
| purb = pdata_urb->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 (rc) { |
| isbad++; |
| SAM("ERROR: usb_submit_urb() failed " |
| "for urb with rc:-%s\n", |
| strerror(rc)); |
| if (rc == -ENOSPC) |
| nospc++; |
| } else { |
| m++; |
| } |
| } else { |
| isbad++; |
| } |
| } |
| if (nospc) { |
| SAM("-ENOSPC=usb_submit_urb() for %i urbs\n", nospc); |
| SAM("..... possibly inadequate USB bandwidth\n"); |
| peasycap->video_eof = 1; |
| } |
| |
| if (isbad) { |
| JOM(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 (pdata_urb) { |
| purb = pdata_urb->purb; |
| if (purb) |
| usb_kill_urb(purb); |
| } |
| } |
| peasycap->video_isoc_streaming = 0; |
| } else { |
| peasycap->video_isoc_streaming = 1; |
| JOM(4, "submitted %i video urbs\n", m); |
| } |
| } else { |
| JOM(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 (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| if (!peasycap->video_isoc_streaming) { |
| JOM(8, "%i=video_isoc_streaming, no video urbs killed\n", |
| peasycap->video_isoc_streaming); |
| return 0; |
| } |
| if (!peasycap->purb_video_head) { |
| SAM("ERROR: peasycap->purb_video_head is NULL\n"); |
| return -EFAULT; |
| } |
| |
| peasycap->video_isoc_streaming = 0; |
| JOM(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 (pdata_urb && pdata_urb->purb) { |
| usb_kill_urb(pdata_urb->purb); |
| m++; |
| } |
| } |
| JOM(4, "%i video urbs killed\n", m); |
| |
| return 0; |
| } |
| /****************************************************************************/ |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| /*--------------------------------------------------------------------------*/ |
| static int easycap_open_noinode(struct file *file) |
| { |
| return easycap_open(NULL, file); |
| } |
| |
| static int videodev_release(struct video_device *pvideo_device) |
| { |
| struct easycap *peasycap; |
| |
| peasycap = video_get_drvdata(pvideo_device); |
| if (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| SAY("ending unsuccessfully\n"); |
| return -EFAULT; |
| } |
| if (0 != kill_video_urbs(peasycap)) { |
| SAM("ERROR: kill_video_urbs() failed\n"); |
| return -EFAULT; |
| } |
| JOM(4, "ending successfully\n"); |
| return 0; |
| } |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| /*****************************************************************************/ |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * THIS FUNCTION IS CALLED FROM WITHIN easycap_usb_disconnect() AND IS |
| * PROTECTED BY SEMAPHORES SET AND CLEARED BY easycap_usb_disconnect(). |
| * |
| * BY THIS STAGE THE DEVICE HAS ALREADY BEEN PHYSICALLY UNPLUGGED, SO |
| * peasycap->pusb_device IS NO LONGER VALID. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| static void easycap_delete(struct kref *pkref) |
| { |
| struct easycap *peasycap; |
| struct data_urb *pdata_urb; |
| struct list_head *plist_head, *plist_next; |
| int k, m, gone, kd; |
| int allocation_video_urb; |
| int allocation_video_page; |
| int allocation_video_struct; |
| int allocation_audio_urb; |
| int allocation_audio_page; |
| int allocation_audio_struct; |
| int registered_video, registered_audio; |
| |
| peasycap = container_of(pkref, struct easycap, kref); |
| if (!peasycap) { |
| SAM("ERROR: peasycap is NULL: cannot perform deletions\n"); |
| return; |
| } |
| kd = isdongle(peasycap); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * FREE VIDEO. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (peasycap->purb_video_head) { |
| JOM(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 (!pdata_urb) { |
| JOM(4, "ERROR: pdata_urb is NULL\n"); |
| } else { |
| if (pdata_urb->purb) { |
| usb_free_urb(pdata_urb->purb); |
| pdata_urb->purb = NULL; |
| peasycap->allocation_video_urb -= 1; |
| m++; |
| } |
| } |
| } |
| |
| JOM(4, "%i video urbs freed\n", m); |
| /*---------------------------------------------------------------------------*/ |
| JOM(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 (pdata_urb) { |
| peasycap->allocation_video_struct -= |
| sizeof(struct data_urb); |
| kfree(pdata_urb); |
| pdata_urb = NULL; |
| m++; |
| } |
| } |
| JOM(4, "%i video data_urb structures freed\n", m); |
| JOM(4, "setting peasycap->purb_video_head=NULL\n"); |
| peasycap->purb_video_head = NULL; |
| } |
| /*---------------------------------------------------------------------------*/ |
| JOM(4, "freeing video isoc buffers.\n"); |
| m = 0; |
| for (k = 0; k < VIDEO_ISOC_BUFFER_MANY; k++) { |
| if (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 = NULL; |
| peasycap->allocation_video_page -= |
| BIT(VIDEO_ISOC_ORDER); |
| m++; |
| } |
| } |
| JOM(4, "isoc video buffers freed: %i pages\n", |
| m * (0x01 << VIDEO_ISOC_ORDER)); |
| /*---------------------------------------------------------------------------*/ |
| JOM(4, "freeing video field buffers.\n"); |
| gone = 0; |
| for (k = 0; k < FIELD_BUFFER_MANY; k++) { |
| for (m = 0; m < FIELD_BUFFER_SIZE/PAGE_SIZE; m++) { |
| if (peasycap->field_buffer[k][m].pgo) { |
| free_page((unsigned long) |
| peasycap->field_buffer[k][m].pgo); |
| peasycap->field_buffer[k][m].pgo = NULL; |
| peasycap->allocation_video_page -= 1; |
| gone++; |
| } |
| } |
| } |
| JOM(4, "video field buffers freed: %i pages\n", gone); |
| /*---------------------------------------------------------------------------*/ |
| JOM(4, "freeing video frame buffers.\n"); |
| gone = 0; |
| for (k = 0; k < FRAME_BUFFER_MANY; k++) { |
| for (m = 0; m < FRAME_BUFFER_SIZE/PAGE_SIZE; m++) { |
| if (peasycap->frame_buffer[k][m].pgo) { |
| free_page((unsigned long) |
| peasycap->frame_buffer[k][m].pgo); |
| peasycap->frame_buffer[k][m].pgo = NULL; |
| peasycap->allocation_video_page -= 1; |
| gone++; |
| } |
| } |
| } |
| JOM(4, "video frame buffers freed: %i pages\n", gone); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * FREE AUDIO. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (peasycap->purb_audio_head) { |
| JOM(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 (!pdata_urb) |
| JOM(4, "ERROR: pdata_urb is NULL\n"); |
| else { |
| if (pdata_urb->purb) { |
| usb_free_urb(pdata_urb->purb); |
| pdata_urb->purb = NULL; |
| peasycap->allocation_audio_urb -= 1; |
| m++; |
| } |
| } |
| } |
| JOM(4, "%i audio urbs freed\n", m); |
| /*---------------------------------------------------------------------------*/ |
| JOM(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 (pdata_urb) { |
| peasycap->allocation_audio_struct -= |
| sizeof(struct data_urb); |
| kfree(pdata_urb); |
| pdata_urb = NULL; |
| m++; |
| } |
| } |
| JOM(4, "%i audio data_urb structures freed\n", m); |
| JOM(4, "setting peasycap->purb_audio_head=NULL\n"); |
| peasycap->purb_audio_head = NULL; |
| } |
| /*---------------------------------------------------------------------------*/ |
| JOM(4, "freeing audio isoc buffers.\n"); |
| m = 0; |
| for (k = 0; k < AUDIO_ISOC_BUFFER_MANY; k++) { |
| if (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 = NULL; |
| peasycap->allocation_audio_page -= |
| BIT(AUDIO_ISOC_ORDER); |
| m++; |
| } |
| } |
| JOM(4, "easyoss_delete(): isoc audio buffers freed: %i pages\n", |
| m * (0x01 << AUDIO_ISOC_ORDER)); |
| /*---------------------------------------------------------------------------*/ |
| JOM(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; |
| |
| if (0 <= kd && DONGLE_MANY > kd) { |
| if (mutex_lock_interruptible(&mutex_dongle)) { |
| SAY("ERROR: cannot down mutex_dongle\n"); |
| } else { |
| JOM(4, "locked mutex_dongle\n"); |
| easycapdc60_dongle[kd].peasycap = NULL; |
| mutex_unlock(&mutex_dongle); |
| JOM(4, "unlocked mutex_dongle\n"); |
| JOT(4, " null-->dongle[%i].peasycap\n", kd); |
| allocation_video_struct -= sizeof(struct easycap); |
| } |
| } else { |
| SAY("ERROR: cannot purge dongle[].peasycap"); |
| } |
| |
| kfree(peasycap); |
| |
| /*---------------------------------------------------------------------------*/ |
| 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; |
| } |
| /*****************************************************************************/ |
| static unsigned int easycap_poll(struct file *file, poll_table *wait) |
| { |
| struct easycap *peasycap; |
| int rc, kd; |
| |
| JOT(8, "\n"); |
| |
| if (NULL == ((poll_table *)wait)) |
| JOT(8, "WARNING: poll table pointer is NULL ... continuing\n"); |
| if (!file) { |
| SAY("ERROR: file pointer is NULL\n"); |
| return -ERESTARTSYS; |
| } |
| peasycap = file->private_data; |
| if (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| if (!peasycap->pusb_device) { |
| SAY("ERROR: peasycap->pusb_device is NULL\n"); |
| return -EFAULT; |
| } |
| /*---------------------------------------------------------------------------*/ |
| kd = isdongle(peasycap); |
| if (0 <= kd && DONGLE_MANY > kd) { |
| if (mutex_lock_interruptible(&easycapdc60_dongle[kd].mutex_video)) { |
| SAY("ERROR: cannot down dongle[%i].mutex_video\n", kd); |
| return -ERESTARTSYS; |
| } |
| JOM(4, "locked dongle[%i].mutex_video\n", kd); |
| /* |
| * MEANWHILE, easycap_usb_disconnect() MAY HAVE FREED POINTER |
| * peasycap, IN WHICH CASE A REPEAT CALL TO isdongle() WILL FAIL. |
| * IF NECESSARY, BAIL OUT. |
| */ |
| if (kd != isdongle(peasycap)) { |
| mutex_unlock(&easycapdc60_dongle[kd].mutex_video); |
| return -ERESTARTSYS; |
| } |
| if (!file) { |
| SAY("ERROR: file is NULL\n"); |
| mutex_unlock(&easycapdc60_dongle[kd].mutex_video); |
| return -ERESTARTSYS; |
| } |
| peasycap = file->private_data; |
| if (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| mutex_unlock(&easycapdc60_dongle[kd].mutex_video); |
| return -ERESTARTSYS; |
| } |
| if (!peasycap->pusb_device) { |
| SAM("ERROR: peasycap->pusb_device is NULL\n"); |
| mutex_unlock(&easycapdc60_dongle[kd].mutex_video); |
| return -ERESTARTSYS; |
| } |
| } else |
| /* |
| * IF easycap_usb_disconnect() HAS ALREADY FREED POINTER peasycap |
| * BEFORE THE ATTEMPT TO ACQUIRE THE SEMAPHORE, isdongle() WILL |
| * HAVE FAILED. BAIL OUT. |
| */ |
| return -ERESTARTSYS; |
| /*---------------------------------------------------------------------------*/ |
| rc = easycap_dqbuf(peasycap, 0); |
| peasycap->polled = 1; |
| mutex_unlock(&easycapdc60_dongle[kd].mutex_video); |
| if (0 == rc) |
| 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 input, ifield, miss, rc; |
| |
| |
| if (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| if (!peasycap->pusb_device) { |
| SAY("ERROR: peasycap->pusb_device is NULL\n"); |
| return -EFAULT; |
| } |
| ifield = 0; |
| JOM(8, "%i=ifield\n", ifield); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * CHECK FOR LOST INPUT SIGNAL. |
| * |
| * FOR THE FOUR-CVBS EasyCAP, THIS DOES NOT WORK AS EXPECTED. |
| * IF INPUT 0 IS PRESENT AND SYNC ACQUIRED, UNPLUGGING INPUT 4 DOES NOT |
| * RESULT IN SETTING BIT 0x40 ON REGISTER 0x1F, PRESUMABLY BECAUSE THERE |
| * IS FLYWHEELING ON INPUT 0. THE UPSHOT IS: |
| * |
| * INPUT 0 PLUGGED, INPUT 4 PLUGGED => SCREEN 0 OK, SCREEN 4 OK |
| * INPUT 0 PLUGGED, INPUT 4 UNPLUGGED => SCREEN 0 OK, SCREEN 4 BLACK |
| * INPUT 0 UNPLUGGED, INPUT 4 PLUGGED => SCREEN 0 BARS, SCREEN 4 OK |
| * INPUT 0 UNPLUGGED, INPUT 4 UNPLUGGED => SCREEN 0 BARS, SCREEN 4 BARS |
| */ |
| /*---------------------------------------------------------------------------*/ |
| input = peasycap->input; |
| if (0 <= input && INPUT_MANY > input) { |
| rc = read_saa(peasycap->pusb_device, 0x1F); |
| if (0 <= rc) { |
| if (rc & 0x40) |
| peasycap->lost[input] += 1; |
| else |
| peasycap->lost[input] -= 2; |
| |
| if (0 > peasycap->lost[input]) |
| peasycap->lost[input] = 0; |
| else if ((2 * VIDEO_LOST_TOLERATE) < peasycap->lost[input]) |
| peasycap->lost[input] = (2 * VIDEO_LOST_TOLERATE); |
| } |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * WAIT FOR FIELD ifield (0 => TOP, 1 => BOTTOM) |
| */ |
| /*---------------------------------------------------------------------------*/ |
| miss = 0; |
| while ((peasycap->field_read == peasycap->field_fill) || |
| (0 != (0xFF00 & peasycap->field_buffer |
| [peasycap->field_read][0].kount)) || |
| (ifield != (0x00FF & peasycap->field_buffer |
| [peasycap->field_read][0].kount))) { |
| if (mode) |
| return -EAGAIN; |
| |
| JOM(8, "first wait on wq_video, %i=field_read %i=field_fill\n", |
| peasycap->field_read, peasycap->field_fill); |
| |
| 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)) && |
| (ifield == (0x00FF & peasycap->field_buffer[peasycap->field_read][0].kount))))))) { |
| SAM("aborted by signal\n"); |
| return -EIO; |
| } |
| if (peasycap->video_idle) { |
| JOM(8, "%i=peasycap->video_idle returning -EAGAIN\n", |
| peasycap->video_idle); |
| return -EAGAIN; |
| } |
| if (peasycap->video_eof) { |
| JOM(8, "%i=peasycap->video_eof\n", peasycap->video_eof); |
| #if defined(PERSEVERE) |
| if (1 == peasycap->status) { |
| JOM(8, "persevering ...\n"); |
| peasycap->video_eof = 0; |
| peasycap->audio_eof = 0; |
| if (0 != reset(peasycap)) { |
| JOM(8, " ... failed returning -EIO\n"); |
| peasycap->video_eof = 1; |
| peasycap->audio_eof = 1; |
| kill_video_urbs(peasycap); |
| return -EIO; |
| } |
| peasycap->status = 0; |
| JOM(8, " ... OK returning -EAGAIN\n"); |
| return -EAGAIN; |
| } |
| #endif /*PERSEVERE*/ |
| peasycap->video_eof = 1; |
| peasycap->audio_eof = 1; |
| kill_video_urbs(peasycap); |
| JOM(8, "returning -EIO\n"); |
| return -EIO; |
| } |
| miss++; |
| } |
| JOM(8, "first awakening on wq_video after %i waits\n", miss); |
| |
| rc = field2frame(peasycap); |
| if (rc) |
| SAM("ERROR: field2frame() rc = %i\n", rc); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * WAIT FOR THE OTHER FIELD |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (ifield) |
| ifield = 0; |
| else |
| ifield = 1; |
| miss = 0; |
| while ((peasycap->field_read == peasycap->field_fill) || |
| (0 != (0xFF00 & peasycap->field_buffer[peasycap->field_read][0].kount)) || |
| (ifield != (0x00FF & peasycap->field_buffer[peasycap->field_read][0].kount))) { |
| if (mode) |
| return -EAGAIN; |
| |
| JOM(8, "second wait on wq_video %i=field_read %i=field_fill\n", |
| peasycap->field_read, peasycap->field_fill); |
| 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)) && |
| (ifield == (0x00FF & peasycap->field_buffer[peasycap->field_read][0].kount))))))) { |
| SAM("aborted by signal\n"); |
| return -EIO; |
| } |
| if (peasycap->video_idle) { |
| JOM(8, "%i=peasycap->video_idle returning -EAGAIN\n", |
| peasycap->video_idle); |
| return -EAGAIN; |
| } |
| if (peasycap->video_eof) { |
| JOM(8, "%i=peasycap->video_eof\n", peasycap->video_eof); |
| #if defined(PERSEVERE) |
| if (1 == peasycap->status) { |
| JOM(8, "persevering ...\n"); |
| peasycap->video_eof = 0; |
| peasycap->audio_eof = 0; |
| if (0 != reset(peasycap)) { |
| JOM(8, " ... failed returning -EIO\n"); |
| peasycap->video_eof = 1; |
| peasycap->audio_eof = 1; |
| kill_video_urbs(peasycap); |
| return -EIO; |
| } |
| peasycap->status = 0; |
| JOM(8, " ... OK ... returning -EAGAIN\n"); |
| return -EAGAIN; |
| } |
| #endif /*PERSEVERE*/ |
| peasycap->video_eof = 1; |
| peasycap->audio_eof = 1; |
| kill_video_urbs(peasycap); |
| JOM(8, "returning -EIO\n"); |
| return -EIO; |
| } |
| miss++; |
| } |
| JOM(8, "second awakening on wq_video after %i waits\n", miss); |
| |
| rc = field2frame(peasycap); |
| if (rc) |
| SAM("ERROR: field2frame() rc = %i\n", rc); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * WASTE THIS FRAME |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (peasycap->skip) { |
| peasycap->skipped++; |
| if (peasycap->skip != peasycap->skipped) |
| return peasycap->skip - peasycap->skipped; |
| else |
| peasycap->skipped = 0; |
| } |
| /*---------------------------------------------------------------------------*/ |
| 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; |
| |
| |
| JOM(8, "setting: %i=peasycap->frame_read\n", peasycap->frame_read); |
| JOM(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_INTERLACED. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| int |
| field2frame(struct easycap *peasycap) |
| { |
| 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; |
| int much, more, over, rump, caches, input; |
| u8 mask, margin; |
| bool odd, isuy, decimatepixel, offerfields, badinput; |
| |
| if (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| |
| badinput = false; |
| input = 0x07 & peasycap->field_buffer[peasycap->field_read][0].input; |
| |
| JOM(8, "===== parity %i, input 0x%02X, field buffer %i --> " |
| "frame buffer %i\n", |
| peasycap->field_buffer[peasycap->field_read][0].kount, |
| peasycap->field_buffer[peasycap->field_read][0].input, |
| peasycap->field_read, peasycap->frame_fill); |
| JOM(8, "===== %i=bytesperpixel\n", peasycap->bytesperpixel); |
| if (peasycap->offerfields) |
| JOM(8, "===== offerfields\n"); |
| |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * REJECT OR CLEAN BAD FIELDS |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (peasycap->field_read == peasycap->field_fill) { |
| SAM("ERROR: on entry, still filling field buffer %i\n", |
| peasycap->field_read); |
| return 0; |
| } |
| #ifdef EASYCAP_TESTCARD |
| easycap_testcard(peasycap, peasycap->field_read); |
| #else |
| if (0 <= input && INPUT_MANY > input) { |
| if (easycap_bars && VIDEO_LOST_TOLERATE <= peasycap->lost[input]) |
| 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)) { |
| SAM("MISTAKE: %i=bytesperpixel\n", bytesperpixel); |
| return -EFAULT; |
| } |
| if (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; |
| odd = !!(peasycap->field_buffer[kex][0].kount); |
| |
| if (odd && (!decimatepixel)) { |
| JOM(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 (!decimatepixel) { |
| over = w2; |
| do { |
| much = over; more = 0; |
| margin = 0; mask = 0x00; |
| if (rex < much) |
| much = rex; |
| rump = 0; |
| |
| if (much % 2) { |
| SAM("MISTAKE: much is odd\n"); |
| return -EFAULT; |
| } |
| |
| more = (bytesperpixel * |
| much) / 2; |
| /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
| if (1 < bytesperpixel) { |
| if (rad * 2 < much * bytesperpixel) { |
| /* |
| * INJUDICIOUS ALTERATION OF |
| * THIS STATEMENT 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 { |
| SAM("MISTAKE: %i=bytesperpixel\n", |
| bytesperpixel); |
| return -EFAULT; |
| } |
| if (rump) |
| caches++; |
| if (badinput) { |
| JOM(8, "ERROR: 0x%02X=->field_buffer" |
| "[%i][%i].input, " |
| "0x%02X=(0x08|->input)\n", |
| peasycap->field_buffer |
| [kex][mex].input, kex, mex, |
| (0x08|peasycap->input)); |
| } |
| rc = redaub(peasycap, pad, pex, much, more, |
| mask, margin, isuy); |
| if (0 > rc) { |
| SAM("ERROR: redaub() failed\n"); |
| return -EFAULT; |
| } |
| if (much % 4) |
| isuy = !isuy; |
| |
| over -= much; cz += much; |
| pex += much; rex -= much; |
| if (!rex) { |
| mex++; |
| pex = peasycap->field_buffer[kex][mex].pgo; |
| rex = PAGE_SIZE; |
| if (peasycap->field_buffer[kex][mex].input != (0x08|peasycap->input)) |
| badinput = true; |
| } |
| 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 (!odd || (cz != wz)) { |
| 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 (!odd) { |
| over = w2; |
| do { |
| much = over; more = 0; margin = 0; mask = 0x00; |
| if (rex < much) |
| much = rex; |
| rump = 0; |
| |
| if (much % 2) { |
| SAM("MISTAKE: much is odd\n"); |
| return -EFAULT; |
| } |
| |
| more = (bytesperpixel * much) / 4; |
| /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
| if (1 < bytesperpixel) { |
| if (rad * 4 < much * bytesperpixel) { |
| /* |
| * INJUDICIOUS ALTERATION OF |
| * THIS STATEMENT 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 { |
| SAM("MISTAKE: %i=bytesperpixel\n", |
| bytesperpixel); |
| return -EFAULT; |
| } |
| /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
| if (rump) |
| caches++; |
| |
| if (badinput) { |
| JOM(8, "ERROR: 0x%02X=->field_buffer" |
| "[%i][%i].input, " |
| "0x%02X=(0x08|->input)\n", |
| peasycap->field_buffer |
| [kex][mex].input, kex, mex, |
| (0x08|peasycap->input)); |
| } |
| rc = redaub(peasycap, pad, pex, much, more, |
| mask, margin, isuy); |
| if (0 > rc) { |
| SAM("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; |
| if (peasycap->field_buffer[kex][mex].input != |
| (0x08|peasycap->input)) |
| badinput = true; |
| } |
| 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; |
| if (peasycap->field_buffer[kex][mex].input != |
| (0x08|peasycap->input)) { |
| JOM(8, "ERROR: 0x%02X=->field_buffer" |
| "[%i][%i].input, " |
| "0x%02X=(0x08|->input)\n", |
| peasycap->field_buffer |
| [kex][mex].input, kex, mex, |
| (0x08|peasycap->input)); |
| badinput = true; |
| } |
| } |
| 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) |
| SAM("ERROR: discrepancy %i in bytes read\n", c2 - cz); |
| c3 = (mad + 1)*PAGE_SIZE - rad; |
| |
| if (!decimatepixel) { |
| if (bytesperpixel * cz != c3) |
| SAM("ERROR: discrepancy %i in bytes written\n", |
| c3 - (bytesperpixel * cz)); |
| } else { |
| if (!odd) { |
| if (bytesperpixel * |
| cz != (4 * c3)) |
| SAM("ERROR: discrepancy %i in bytes written\n", |
| (2*c3)-(bytesperpixel * cz)); |
| } else { |
| if (0 != c3) |
| SAM("ERROR: discrepancy %i " |
| "in bytes written\n", c3); |
| } |
| } |
| if (rump) |
| SAM("WORRY: undischarged cache at end of line in frame buffer\n"); |
| |
| JOM(8, "===== field2frame(): %i bytes --> %i bytes (incl skip)\n", c2, c3); |
| JOM(8, "===== field2frame(): %i=mad %i=rad\n", mad, rad); |
| |
| if (odd) |
| JOM(8, "+++++ field2frame(): frame buffer %i is full\n", kad); |
| |
| if (peasycap->field_read == peasycap->field_fill) |
| SAM("WARNING: on exit, filling field buffer %i\n", |
| peasycap->field_read); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * CALCULATE VIDEO STREAMING RATE |
| */ |
| /*---------------------------------------------------------------------------*/ |
| do_gettimeofday(&timeval); |
| if (peasycap->timeval6.tv_sec) { |
| below = ((long long int)(1000000)) * |
| ((long long int)(timeval.tv_sec - |
| peasycap->timeval6.tv_sec)) + |
| (long long int)(timeval.tv_usec - peasycap->timeval6.tv_usec); |
| above = (long long int)1000000; |
| |
| sdr = signed_div(above, below); |
| above = sdr.quotient; |
| remainder = (u32)sdr.remainder; |
| |
| JOM(8, "video streaming at %3lli.%03i fields per second\n", |
| above, (remainder/1000)); |
| } |
| peasycap->timeval6 = timeval; |
| |
| if (caches) |
| JOM(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]; |
| u8 *pcache; |
| u8 r, g, b, y, u, v, c, *p2, *p3, *pz, *pr; |
| int bytesperpixel; |
| bool byteswaporder, decimatepixel, last; |
| int j, rump; |
| s32 tmp; |
| |
| if (much % 2) { |
| SAM("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++) { |
| tmp = (0xFF00 & (453 * j)) >> 8; |
| bu[j + 128] = tmp; bu[127 - j] = -tmp; |
| tmp = (0xFF00 & (359 * j)) >> 8; |
| rv[j + 128] = tmp; rv[127 - j] = -tmp; |
| tmp = (0xFF00 & (88 * j)) >> 8; |
| gu[j + 128] = tmp; gu[127 - j] = -tmp; |
| tmp = (0xFF00 & (183 * j)) >> 8; |
| gv[j + 128] = tmp; gv[127 - j] = -tmp; |
| } |
| 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]; |
| JOM(8, "lookup tables are prepared\n"); |
| } |
| pcache = peasycap->pcache; |
| if (!pcache) |
| pcache = &peasycap->cache[0]; |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * TRANSFER CONTENTS OF CACHE TO THE FRAME BUFFER |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (!pcache) { |
| SAM("MISTAKE: pcache is NULL\n"); |
| return -EFAULT; |
| } |
| |
| if (pcache != &peasycap->cache[0]) |
| JOM(16, "cache has %i bytes\n", (int)(pcache - &peasycap->cache[0])); |
| p2 = &peasycap->cache[0]; |
| p3 = (u8 *)pad - (int)(pcache - &peasycap->cache[0]); |
| while (p2 < pcache) { |
| *p3++ = *p2; p2++; |
| } |
| pcache = &peasycap->cache[0]; |
| if (p3 != pad) { |
| SAM("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 (isuy) |
| u = *(p2 - 1); |
| else |
| v = *(p2 - 1); |
| |
| if (rump) |
| JOM(16, "%4i=much %4i=more %i=rump\n", much, more, rump); |
| |
| /*---------------------------------------------------------------------------*/ |
| switch (bytesperpixel) { |
| case 2: { |
| if (!decimatepixel) { |
| memcpy(pad, pex, (size_t)much); |
| if (!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 (!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 (!decimatepixel) { |
| if (!byteswaporder) { |
| /* RGB */ |
| while (pz > p2) { |
| if (pr <= (p3 + bytesperpixel)) |
| last = true; |
| else |
| last = false; |
| y = *p2; |
| if (last && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| tmp = ay[(int)y] + rv[(int)v]; |
| r = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] - gu[(int)u] - gv[(int)v]; |
| g = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] + bu[(int)u]; |
| b = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| |
| if (last && rump) { |
| pcache = &peasycap->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: { |
| SAM("MISTAKE: %i=rump\n", |
| bytesperpixel - rump); |
| return -EFAULT; |
| } |
| } |
| } else { |
| *p3 = r; |
| *(p3 + 1) = g; |
| *(p3 + 2) = b; |
| } |
| p2 += 2; |
| if (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 (last && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (isuy) |
| v = margin; |
| else |
| u = margin; |
| } |
| else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| tmp = ay[(int)y] + rv[(int)v]; |
| r = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] - gu[(int)u] - gv[(int)v]; |
| g = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] + bu[(int)u]; |
| b = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| |
| if (last && rump) { |
| pcache = &peasycap->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: { |
| SAM("MISTAKE: %i=rump\n", |
| bytesperpixel - rump); |
| return -EFAULT; |
| } |
| } |
| } else { |
| *p3 = b; |
| *(p3 + 1) = g; |
| *(p3 + 2) = r; |
| } |
| p2 += 2; |
| if (isuy) |
| isuy = false; |
| else |
| isuy = true; |
| p3 += bytesperpixel; |
| } |
| } |
| return 0; |
| } else { |
| if (!byteswaporder) { |
| /* RGB DECIMATED */ |
| while (pz > p2) { |
| if (pr <= (p3 + bytesperpixel)) |
| last = true; |
| else |
| last = false; |
| y = *p2; |
| if (last && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| if (isuy) { |
| tmp = ay[(int)y] + rv[(int)v]; |
| r = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] - gu[(int)u] - |
| gv[(int)v]; |
| g = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] + bu[(int)u]; |
| b = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| |
| if (last && rump) { |
| pcache = &peasycap->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: { |
| SAM("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 (last && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| if (isuy) { |
| |
| tmp = ay[(int)y] + rv[(int)v]; |
| r = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] - gu[(int)u] - |
| gv[(int)v]; |
| g = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] + bu[(int)u]; |
| b = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| |
| if (last && rump) { |
| pcache = &peasycap->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: { |
| SAM("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 (!decimatepixel) { |
| if (!byteswaporder) { |
| /* RGBA */ |
| while (pz > p2) { |
| if (pr <= (p3 + bytesperpixel)) |
| last = true; |
| else |
| last = false; |
| y = *p2; |
| if (last && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| tmp = ay[(int)y] + rv[(int)v]; |
| r = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] - gu[(int)u] - gv[(int)v]; |
| g = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] + bu[(int)u]; |
| b = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| |
| if (last && rump) { |
| pcache = &peasycap->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: { |
| SAM("MISTAKE: %i=rump\n", |
| bytesperpixel - rump); |
| return -EFAULT; |
| } |
| } |
| } else { |
| *p3 = r; |
| *(p3 + 1) = g; |
| *(p3 + 2) = b; |
| *(p3 + 3) = 0; |
| } |
| p2 += 2; |
| if (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 (last && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| tmp = ay[(int)y] + rv[(int)v]; |
| r = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] - gu[(int)u] - gv[(int)v]; |
| g = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] + bu[(int)u]; |
| b = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| |
| if (last && rump) { |
| pcache = &peasycap->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: |
| SAM("MISTAKE: %i=rump\n", |
| bytesperpixel - rump); |
| return -EFAULT; |
| } |
| } else { |
| *p3 = b; |
| *(p3 + 1) = g; |
| *(p3 + 2) = r; |
| *(p3 + 3) = 0; |
| } |
| p2 += 2; |
| if (isuy) |
| isuy = false; |
| else |
| isuy = true; |
| p3 += bytesperpixel; |
| } |
| } |
| return 0; |
| } else { |
| if (!byteswaporder) { |
| /* |
| * RGBA DECIMATED |
| */ |
| while (pz > p2) { |
| if (pr <= (p3 + bytesperpixel)) |
| last = true; |
| else |
| last = false; |
| y = *p2; |
| if (last && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| if (isuy) { |
| |
| tmp = ay[(int)y] + rv[(int)v]; |
| r = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] - gu[(int)u] - |
| gv[(int)v]; |
| g = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] + bu[(int)u]; |
| b = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| |
| if (last && rump) { |
| pcache = &peasycap->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: { |
| SAM("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 (last && (0x0C & mask)) { |
| if (0x04 & mask) { |
| if (isuy) |
| v = margin; |
| else |
| u = margin; |
| } else |
| if (0x08 & mask) |
| ; |
| } else { |
| if (isuy) |
| v = *(p2 + 1); |
| else |
| u = *(p2 + 1); |
| } |
| |
| if (isuy) { |
| tmp = ay[(int)y] + rv[(int)v]; |
| r = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] - gu[(int)u] - |
| gv[(int)v]; |
| g = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| tmp = ay[(int)y] + bu[(int)u]; |
| b = (255 < tmp) ? 255 : ((0 > tmp) ? |
| 0 : (u8)tmp); |
| |
| if (last && rump) { |
| pcache = &peasycap->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: { |
| SAM("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: { |
| SAM("MISTAKE: %i=bytesperpixel\n", bytesperpixel); |
| return -EFAULT; |
| } |
| } |
| return 0; |
| } |
| /*****************************************************************************/ |
| /* |
| * SEE CORBET ET AL. "LINUX DEVICE DRIVERS", 3rd EDITION, PAGES 430-434 |
| */ |
| /*****************************************************************************/ |
| static void easycap_vma_open(struct vm_area_struct *pvma) |
| { |
| struct easycap *peasycap; |
| |
| peasycap = pvma->vm_private_data; |
| if (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return; |
| } |
| peasycap->vma_many++; |
| JOT(8, "%i=peasycap->vma_many\n", peasycap->vma_many); |
| return; |
| } |
| /*****************************************************************************/ |
| static void easycap_vma_close(struct vm_area_struct *pvma) |
| { |
| struct easycap *peasycap; |
| |
| peasycap = pvma->vm_private_data; |
| if (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return; |
| } |
| peasycap->vma_many--; |
| JOT(8, "%i=peasycap->vma_many\n", peasycap->vma_many); |
| return; |
| } |
| /*****************************************************************************/ |
| static 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; |
| |
| if (!pvma) { |
| SAY("pvma is NULL\n"); |
| return retcode; |
| } |
| if (!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 (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return retcode; |
| } |
| /*---------------------------------------------------------------------------*/ |
| pbuf = peasycap->frame_buffer[k][m].pgo; |
| if (!pbuf) { |
| SAM("ERROR: pbuf is NULL\n"); |
| return retcode; |
| } |
| page = virt_to_page(pbuf); |
| if (!page) { |
| SAM("ERROR: page is NULL\n"); |
| return retcode; |
| } |
| get_page(page); |
| /*---------------------------------------------------------------------------*/ |
| if (!page) { |
| SAM("ERROR: page is NULL after get_page(page)\n"); |
| } else { |
| pvmf->page = page; |
| retcode = VM_FAULT_MINOR; |
| } |
| return retcode; |
| } |
| |
| static const struct vm_operations_struct easycap_vm_ops = { |
| .open = easycap_vma_open, |
| .close = easycap_vma_close, |
| .fault = easycap_vma_fault, |
| }; |
| |
| static 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 (file) |
| pvma->vm_private_data = file->private_data; |
| easycap_vma_open(pvma); |
| return 0; |
| } |
| /*****************************************************************************/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * ON COMPLETION OF A VIDEO URB ITS DATA IS COPIED TO THE FIELD BUFFERS |
| * PROVIDED peasycap->video_idle IS ZERO. 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 & 0x1000) => BUFFER HAS DATA FROM DISPARATE INPUTS |
| * 0 != (kount & 0x0400) => RESERVED |
| * 0 != (kount & 0x0200) => FIELD BUFFER NOT YET CHECKED |
| * 0 != (kount & 0x0100) => BUFFER HAS TWO EXTRA BYTES - WHY? |
| */ |
| /*---------------------------------------------------------------------------*/ |
| static void easycap_complete(struct urb *purb) |
| { |
| struct easycap *peasycap; |
| struct data_buffer *pfield_buffer; |
| char errbuf[16]; |
| int i, more, much, leap, rc, last; |
| int videofieldamount; |
| unsigned int override, bad; |
| int framestatus, framelength, frameactual, frameoffset; |
| u8 *pu; |
| |
| if (!purb) { |
| SAY("ERROR: easycap_complete(): purb is NULL\n"); |
| return; |
| } |
| peasycap = purb->context; |
| if (!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; |
| JOM(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))) { |
| JOM(16, "ERROR: out-of-order urbs %i,%i ... continuing\n", |
| last, i); |
| } |
| peasycap->video_isoc_sequence = i; |
| |
| if (peasycap->video_idle) { |
| JOM(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 (rc) { |
| SAM("%s:%d ENOMEM\n", strerror(rc), rc); |
| if (-ENODEV != rc) |
| SAM("ERROR: while %i=video_idle, " |
| "usb_submit_urb() " |
| "failed with rc:\n", |
| peasycap->video_idle); |
| } |
| } |
| return; |
| } |
| override = 0; |
| /*---------------------------------------------------------------------------*/ |
| if (FIELD_BUFFER_MANY <= peasycap->field_fill) { |
| SAM("ERROR: bad peasycap->field_fill\n"); |
| return; |
| } |
| if (purb->status) { |
| if ((-ESHUTDOWN == purb->status) || (-ENOENT == purb->status)) { |
| JOM(8, "urb status -ESHUTDOWN or -ENOENT\n"); |
| return; |
| } |
| |
| (peasycap->field_buffer[peasycap->field_fill][0].kount) |= 0x8000 ; |
| SAM("ERROR: bad urb status -%s: %d\n", |
| strerror(purb->status), purb->status); |
| /*---------------------------------------------------------------------------*/ |
| } 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 ; |
| /* FIXME: 1. missing '-' check boundaries */ |
| strcpy(&errbuf[0], |
| strerror(purb->iso_frame_desc[i].status)); |
| } |
| 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; |
| |
| JOM(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) |
| peasycap->video_mt++; |
| if (4 < more) { |
| if (peasycap->video_mt) { |
| JOM(8, "%4i empty video urb frames\n", |
| peasycap->video_mt); |
| peasycap->video_mt = 0; |
| } |
| if (FIELD_BUFFER_MANY <= peasycap->field_fill) { |
| SAM("ERROR: bad peasycap->field_fill\n"); |
| return; |
| } |
| if (FIELD_BUFFER_SIZE/PAGE_SIZE <= |
| peasycap->field_page) { |
| SAM("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; |
| peasycap->video_junk += (1 + |
| VIDEO_JUNK_TOLERATE); |
| } else |
| (peasycap->field_buffer |
| [peasycap->field_fill] |
| [0].kount) |= 0x4000; |
| } else if (videofieldamount < |
| peasycap-> |
| videofieldamount) { |
| (peasycap->field_buffer |
| [peasycap->field_fill] |
| [0].kount) |= 0x2000; |
| } |
| bad = 0xFF00 & peasycap->field_buffer |
| [peasycap->field_fill] |
| [0].kount; |
| if (!bad) { |
| (peasycap->video_junk)--; |
| if (-VIDEO_JUNK_TOLERATE > |
| peasycap->video_junk) |
| peasycap->video_junk = |
| -VIDEO_JUNK_TOLERATE; |
| 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; |
| JOM(8, "bumped to: %i=" |
| "peasycap->" |
| "field_fill %i=" |
| "parity\n", |
| peasycap->field_fill, |
| 0x00FF & |
| pfield_buffer->kount); |
| JOM(8, "field buffer %i has " |
| "%i bytes fit to be " |
| "read\n", |
| peasycap->field_read, |
| videofieldamount); |
| JOM(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++; |
| if (bad & 0x0010) |
| peasycap->video_junk += |
| (1 + VIDEO_JUNK_TOLERATE/2); |
| JOM(8, "field buffer %i had %i " |
| "bytes, now discarded: " |
| "0x%04X\n", |
| peasycap->field_fill, |
| videofieldamount, |
| (0xFF00 & |
| peasycap->field_buffer |
| [peasycap->field_fill][0]. |
| kount)); |
| (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; |
| |
| JOM(8, "bumped to: %i=peasycap->" |
| "field_fill %i=parity\n", |
| peasycap->field_fill, |
| 0x00FF & pfield_buffer->kount); |
| } |
| if (8 == more) { |
| JOM(8, "end-of-field: received " |
| "parity byte 0x%02X\n", |
| (0xFF & *pu)); |
| if (0x40 & *pu) |
| pfield_buffer->kount = 0x0000; |
| else |
| pfield_buffer->kount = 0x0001; |
| pfield_buffer->input = 0x08 | |
| (0x07 & peasycap->input); |
| JOM(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) { |
| SAM("ERROR: bad peasycap->field_fill\n"); |
| return; |
| } |
| if (FIELD_BUFFER_SIZE/PAGE_SIZE <= peasycap->field_page) { |
| SAM("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)) { |
| SAM("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) { |
| JOM(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; |
| pfield_buffer->input = 0x08 | |
| (0x07 & peasycap->input); |
| if ((peasycap->field_buffer[peasycap-> |
| field_fill][0]). |
| input != |
| pfield_buffer->input) |
| (peasycap->field_buffer |
| [peasycap->field_fill] |
| [0]).kount |= 0x1000; |
| } |
| |
| 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; |
| } |
| } |
| } |
| } |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * 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) { |
| SAM("easycap driver shutting down on condition green\n"); |
| peasycap->status = 1; |
| peasycap->video_eof = 1; |
| peasycap->video_junk = 0; |
| wake_up_interruptible(&peasycap->wq_video); |
| #if !defined(PERSEVERE) |
| peasycap->audio_eof = 1; |
| wake_up_interruptible(&peasycap->wq_audio); |
| #endif /*PERSEVERE*/ |
| return; |
| } |
| if (peasycap->video_isoc_streaming) { |
| rc = usb_submit_urb(purb, GFP_ATOMIC); |
| if (rc) { |
| SAM("%s: %d\n", strerror(rc), rc); |
| if (-ENODEV != rc) |
| SAM("ERROR: while %i=video_idle, " |
| "usb_submit_urb() " |
| "failed with rc:\n", |
| peasycap->video_idle); |
| } |
| } |
| return; |
| } |
| static const struct file_operations easycap_fops = { |
| .owner = THIS_MODULE, |
| .open = easycap_open, |
| .unlocked_ioctl = easycap_unlocked_ioctl, |
| .poll = easycap_poll, |
| .mmap = easycap_mmap, |
| .llseek = no_llseek, |
| }; |
| static const struct usb_class_driver easycap_class = { |
| .name = "usb/easycap%d", |
| .fops = &easycap_fops, |
| .minor_base = USB_SKEL_MINOR_BASE, |
| }; |
| /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/ |
| static const struct v4l2_file_operations v4l2_fops = { |
| .owner = THIS_MODULE, |
| .open = easycap_open_noinode, |
| .unlocked_ioctl = easycap_unlocked_ioctl, |
| .poll = easycap_poll, |
| .mmap = easycap_mmap, |
| }; |
| /*****************************************************************************/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * WHEN THE EasyCAP IS PHYSICALLY PLUGGED IN, THIS FUNCTION IS CALLED THREE |
| * TIMES, ONCE FOR EACH OF THE THREE INTERFACES. BEWARE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| static int easycap_usb_probe(struct usb_interface *intf, |
| const struct usb_device_id *id) |
| { |
| struct usb_device *usbdev; |
| struct usb_host_interface *alt; |
| struct usb_endpoint_descriptor *ep; |
| struct usb_interface_descriptor *interface; |
| struct urb *purb; |
| struct easycap *peasycap; |
| int ndong; |
| struct data_urb *pdata_urb; |
| int i, j, k, m, rc; |
| u8 bInterfaceNumber; |
| u8 bInterfaceClass; |
| u8 bInterfaceSubClass; |
| void *pbuf; |
| int okalt[8], isokalt; |
| int okepn[8]; |
| int okmps[8]; |
| int maxpacketsize; |
| u16 mask; |
| s32 value; |
| struct easycap_format *peasycap_format; |
| int fmtidx; |
| struct inputset *inputset; |
| |
| usbdev = interface_to_usbdev(intf); |
| |
| /*---------------------------------------------------------------------------*/ |
| alt = usb_altnum_to_altsetting(intf, 0); |
| if (!alt) { |
| SAY("ERROR: usb_host_interface not found\n"); |
| return -EFAULT; |
| } |
| interface = &alt->desc; |
| if (!interface) { |
| SAY("ERROR: intf_descriptor is NULL\n"); |
| return -EFAULT; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * GET PROPERTIES OF PROBED INTERFACE |
| */ |
| /*---------------------------------------------------------------------------*/ |
| bInterfaceNumber = interface->bInterfaceNumber; |
| bInterfaceClass = interface->bInterfaceClass; |
| bInterfaceSubClass = interface->bInterfaceSubClass; |
| |
| JOT(4, "intf[%i]: num_altsetting=%i\n", |
| bInterfaceNumber, intf->num_altsetting); |
| JOT(4, "intf[%i]: cur_altsetting - altsetting=%li\n", |
| bInterfaceNumber, |
| (long int)(intf->cur_altsetting - intf->altsetting)); |
| JOT(4, "intf[%i]: bInterfaceClass=0x%02X bInterfaceSubClass=0x%02X\n", |
| bInterfaceNumber, bInterfaceClass, bInterfaceSubClass); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * 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 EasyCAP WAS |
| * PHYSICALLY UNPLUGGED. |
| * |
| * THE POINTER peasycap TO THE struct easycap IS REMEMBERED WHEN |
| * INTERFACES 1 AND 2 ARE PROBED. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (0 == bInterfaceNumber) { |
| peasycap = kzalloc(sizeof(struct easycap), GFP_KERNEL); |
| if (!peasycap) { |
| SAY("ERROR: Could not allocate peasycap\n"); |
| return -ENOMEM; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * PERFORM URGENT INTIALIZATIONS ... |
| */ |
| /*---------------------------------------------------------------------------*/ |
| peasycap->minor = -1; |
| kref_init(&peasycap->kref); |
| JOM(8, "intf[%i]: after kref_init(..._video) " |
| "%i=peasycap->kref.refcount.counter\n", |
| bInterfaceNumber, peasycap->kref.refcount.counter); |
| |
| /* module params */ |
| peasycap->gain = (s8)clamp(easycap_gain, 0, 31); |
| |
| init_waitqueue_head(&peasycap->wq_video); |
| init_waitqueue_head(&peasycap->wq_audio); |
| init_waitqueue_head(&peasycap->wq_trigger); |
| |
| if (mutex_lock_interruptible(&mutex_dongle)) { |
| SAY("ERROR: cannot down mutex_dongle\n"); |
| return -ERESTARTSYS; |
| } else { |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * FOR INTERFACES 1 AND 2 THE POINTER peasycap WILL NEED TO |
| * TO BE THE SAME AS THAT ALLOCATED NOW FOR INTERFACE 0. |
| * |
| * NORMALLY ndong WILL NOT HAVE CHANGED SINCE INTERFACE 0 WAS |
| * PROBED, BUT THIS MAY NOT BE THE CASE IF, FOR EXAMPLE, TWO |
| * EASYCAPs ARE PLUGGED IN SIMULTANEOUSLY. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| for (ndong = 0; ndong < DONGLE_MANY; ndong++) { |
| if ((!easycapdc60_dongle[ndong].peasycap) && |
| (!mutex_is_locked(&easycapdc60_dongle |
| [ndong].mutex_video)) && |
| (!mutex_is_locked(&easycapdc60_dongle |
| [ndong].mutex_audio))) { |
| easycapdc60_dongle[ndong].peasycap = peasycap; |
| peasycap->isdongle = ndong; |
| JOM(8, "intf[%i]: peasycap-->easycap" |
| "_dongle[%i].peasycap\n", |
| bInterfaceNumber, ndong); |
| break; |
| } |
| } |
| if (DONGLE_MANY <= ndong) { |
| SAM("ERROR: too many dongles\n"); |
| mutex_unlock(&mutex_dongle); |
| return -ENOMEM; |
| } |
| mutex_unlock(&mutex_dongle); |
| } |
| 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; |
| |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * ... AND FURTHER INITIALIZE THE STRUCTURE |
| */ |
| /*---------------------------------------------------------------------------*/ |
| peasycap->pusb_device = usbdev; |
| peasycap->pusb_interface = intf; |
| |
| 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; |
| |
| for (k = 0; k < INPUT_MANY; k++) |
| peasycap->lost[k] = 0; |
| peasycap->skip = 0; |
| peasycap->skipped = 0; |
| peasycap->offerfields = 0; |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * DYNAMICALLY FILL IN THE AVAILABLE FORMATS ... |
| */ |
| /*---------------------------------------------------------------------------*/ |
| rc = fillin_formats(); |
| if (0 > rc) { |
| SAM("ERROR: fillin_formats() rc = %i\n", rc); |
| return -EFAULT; |
| } |
| JOM(4, "%i formats available\n", rc); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * ... AND POPULATE easycap.inputset[] |
| */ |
| /*---------------------------------------------------------------------------*/ |
| /* FIXME: maybe we just use memset 0 */ |
| inputset = peasycap->inputset; |
| for (k = 0; k < INPUT_MANY; k++) { |
| inputset[k].input_ok = 0; |
| inputset[k].standard_offset_ok = 0; |
| inputset[k].format_offset_ok = 0; |
| inputset[k].brightness_ok = 0; |
| inputset[k].contrast_ok = 0; |
| inputset[k].saturation_ok = 0; |
| inputset[k].hue_ok = 0; |
| } |
| |
| fmtidx = peasycap->ntsc ? NTSC_M : PAL_BGHIN; |
| m = 0; |
| mask = 0; |
| for (i = 0; 0xFFFF != easycap_standard[i].mask; i++) { |
| if (fmtidx == easycap_standard[i].v4l2_standard.index) { |
| m++; |
| for (k = 0; k < INPUT_MANY; k++) |
| inputset[k].standard_offset = i; |
| |
| mask = easycap_standard[i].mask; |
| } |
| } |
| |
| if (1 != m) { |
| SAM("ERROR: " |
| "inputset->standard_offset unpopulated, %i=m\n", m); |
| return -ENOENT; |
| } |
| |
| peasycap_format = &easycap_format[0]; |
| m = 0; |
| for (i = 0; peasycap_format->v4l2_format.fmt.pix.width; i++) { |
| struct v4l2_pix_format *pix = |
| &peasycap_format->v4l2_format.fmt.pix; |
| if (((peasycap_format->mask & 0x0F) == (mask & 0x0F)) && |
| pix->field == V4L2_FIELD_NONE && |
| pix->pixelformat == V4L2_PIX_FMT_UYVY && |
| pix->width == 640 && pix->height == 480) { |
| m++; |
| for (k = 0; k < INPUT_MANY; k++) |
| inputset[k].format_offset = i; |
| break; |
| } |
| peasycap_format++; |
| } |
| if (1 != m) { |
| SAM("ERROR: inputset[]->format_offset unpopulated\n"); |
| return -ENOENT; |
| } |
| |
| m = 0; |
| for (i = 0; 0xFFFFFFFF != easycap_control[i].id; i++) { |
| value = easycap_control[i].default_value; |
| if (V4L2_CID_BRIGHTNESS == easycap_control[i].id) { |
| m++; |
| for (k = 0; k < INPUT_MANY; k++) |
| inputset[k].brightness = value; |
| } else if (V4L2_CID_CONTRAST == easycap_control[i].id) { |
| m++; |
| for (k = 0; k < INPUT_MANY; k++) |
| inputset[k].contrast = value; |
| } else if (V4L2_CID_SATURATION == easycap_control[i].id) { |
| m++; |
| for (k = 0; k < INPUT_MANY; k++) |
| inputset[k].saturation = value; |
| } else if (V4L2_CID_HUE == easycap_control[i].id) { |
| m++; |
| for (k = 0; k < INPUT_MANY; k++) |
| inputset[k].hue = value; |
| } |
| } |
| |
| if (4 != m) { |
| SAM("ERROR: inputset[]->brightness underpopulated\n"); |
| return -ENOENT; |
| } |
| for (k = 0; k < INPUT_MANY; k++) |
| inputset[k].input = k; |
| JOM(4, "populated inputset[]\n"); |
| JOM(4, "finished initialization\n"); |
| } else { |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * FIXME |
| * |
| * IDENTIFY THE APPROPRIATE POINTER peasycap FOR INTERFACES 1 AND 2. |
| * THE ADDRESS OF peasycap->pusb_device IS RELUCTANTLY USED FOR THIS PURPOSE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| for (ndong = 0; ndong < DONGLE_MANY; ndong++) { |
| if (usbdev == easycapdc60_dongle[ndong].peasycap-> |
| pusb_device) { |
| peasycap = easycapdc60_dongle[ndong].peasycap; |
| JOT(8, "intf[%i]: dongle[%i].peasycap\n", |
| bInterfaceNumber, ndong); |
| break; |
| } |
| } |
| if (DONGLE_MANY <= ndong) { |
| SAY("ERROR: peasycap is unknown when probing interface %i\n", |
| bInterfaceNumber); |
| return -ENODEV; |
| } |
| if (!peasycap) { |
| SAY("ERROR: peasycap is NULL when probing interface %i\n", |
| bInterfaceNumber); |
| return -ENODEV; |
| } |
| } |
| /*---------------------------------------------------------------------------*/ |
| if ((USB_CLASS_VIDEO == bInterfaceClass) || |
| (USB_CLASS_VENDOR_SPEC == bInterfaceClass)) { |
| if (-1 == peasycap->video_interface) { |
| peasycap->video_interface = bInterfaceNumber; |
| JOM(4, "setting peasycap->video_interface=%i\n", |
| peasycap->video_interface); |
| } else { |
| if (peasycap->video_interface != bInterfaceNumber) { |
| SAM("ERROR: attempting to reset " |
| "peasycap->video_interface\n"); |
| SAM("...... continuing with " |
| "%i=peasycap->video_interface\n", |
| peasycap->video_interface); |
| } |
| } |
| } else if ((USB_CLASS_AUDIO == bInterfaceClass) && |
| (USB_SUBCLASS_AUDIOSTREAMING == bInterfaceSubClass)) { |
| if (-1 == peasycap->audio_interface) { |
| peasycap->audio_interface = bInterfaceNumber; |
| JOM(4, "setting peasycap->audio_interface=%i\n", |
| peasycap->audio_interface); |
| } else { |
| if (peasycap->audio_interface != bInterfaceNumber) { |
| SAM("ERROR: attempting to reset " |
| "peasycap->audio_interface\n"); |
| SAM("...... 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; |
| |
| for (i = 0; i < intf->num_altsetting; i++) { |
| alt = usb_altnum_to_altsetting(intf, i); |
| if (!alt) { |
| SAM("ERROR: alt is NULL\n"); |
| return -EFAULT; |
| } |
| interface = &alt->desc; |
| if (!interface) { |
| SAM("ERROR: intf_descriptor is NULL\n"); |
| return -EFAULT; |
| } |
| |
| if (0 == interface->bNumEndpoints) |
| JOM(4, "intf[%i]alt[%i] has no endpoints\n", |
| bInterfaceNumber, i); |
| /*---------------------------------------------------------------------------*/ |
| for (j = 0; j < interface->bNumEndpoints; j++) { |
| ep = &alt->endpoint[j].desc; |
| if (!ep) { |
| SAM("ERROR: ep is NULL.\n"); |
| SAM("...... skipping\n"); |
| continue; |
| } |
| |
| if (!usb_endpoint_is_isoc_in(ep)) { |
| JOM(4, "intf[%i]alt[%i]end[%i] is a %d endpoint\n", |
| bInterfaceNumber, |
| i, j, ep->bmAttributes); |
| if (usb_endpoint_dir_out(ep)) { |
| SAM("ERROR: OUT endpoint unexpected\n"); |
| SAM("...... continuing\n"); |
| } |
| continue; |
| } |
| switch (bInterfaceClass) { |
| case USB_CLASS_VIDEO: |
| case USB_CLASS_VENDOR_SPEC: { |
| if (ep->wMaxPacketSize) { |
| if (8 > isokalt) { |
| okalt[isokalt] = i; |
| JOM(4, |
| "%i=okalt[%i]\n", |
| okalt[isokalt], |
| isokalt); |
| okepn[isokalt] = |
| ep-> |
| bEndpointAddress & |
| 0x0F; |
| JOM(4, |
| "%i=okepn[%i]\n", |
| okepn[isokalt], |
| isokalt); |
| okmps[isokalt] = |
| le16_to_cpu(ep-> |
| wMaxPacketSize); |
| JOM(4, |
| "%i=okmps[%i]\n", |
| okmps[isokalt], |
| isokalt); |
| isokalt++; |
| } |
| } else { |
| if (-1 == peasycap-> |
| video_altsetting_off) { |
| peasycap-> |
| video_altsetting_off = |
| i; |
| JOM(4, "%i=video_" |
| "altsetting_off " |
| "<====\n", |
| peasycap-> |
| video_altsetting_off); |
| } else { |
| SAM("ERROR: peasycap" |
| "->video_altsetting_" |
| "off already set\n"); |
| SAM("...... " |
| "continuing with " |
| "%i=peasycap->video_" |
| "altsetting_off\n", |
| peasycap-> |
| video_altsetting_off); |
| } |
| } |
| break; |
| } |
| case USB_CLASS_AUDIO: { |
| if (bInterfaceSubClass != |
| USB_SUBCLASS_AUDIOSTREAMING) |
| break; |
| if (!peasycap) { |
| SAM("MISTAKE: " |
| "peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| if (ep->wMaxPacketSize) { |
| if (8 > isokalt) { |
| okalt[isokalt] = i ; |
| JOM(4, |
| "%i=okalt[%i]\n", |
| okalt[isokalt], |
| isokalt); |
| okepn[isokalt] = |
| ep-> |
| bEndpointAddress & |
| 0x0F; |
| JOM(4, |
| "%i=okepn[%i]\n", |
| okepn[isokalt], |
| isokalt); |
| okmps[isokalt] = |
| le16_to_cpu(ep-> |
| wMaxPacketSize); |
| JOM(4, |
| "%i=okmps[%i]\n", |
| okmps[isokalt], |
| isokalt); |
| isokalt++; |
| } |
| } else { |
| if (-1 == peasycap-> |
| audio_altsetting_off) { |
| peasycap-> |
| audio_altsetting_off = |
| i; |
| JOM(4, "%i=audio_" |
| "altsetting_off " |
| "<====\n", |
| peasycap-> |
| audio_altsetting_off); |
| } else { |
| SAM("ERROR: peasycap" |
| "->audio_altsetting_" |
| "off already set\n"); |
| SAM("...... " |
| "continuing with " |
| "%i=peasycap->" |
| "audio_altsetting_" |
| "off\n", |
| peasycap-> |
| audio_altsetting_off); |
| } |
| } |
| break; |
| } |
| default: |
| break; |
| } |
| if (0 == ep->wMaxPacketSize) { |
| JOM(4, "intf[%i]alt[%i]end[%i] " |
| "has zero packet size\n", |
| bInterfaceNumber, i, j); |
| } |
| } |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * PERFORM INITIALIZATION OF THE PROBED INTERFACE |
| */ |
| /*---------------------------------------------------------------------------*/ |
| JOM(4, "initialization begins for interface %i\n", |
| interface->bInterfaceNumber); |
| switch (bInterfaceNumber) { |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * INTERFACE 0 IS THE VIDEO INTERFACE |
| */ |
| /*---------------------------------------------------------------------------*/ |
| case 0: { |
| if (!peasycap) { |
| SAM("MISTAKE: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| if (!isokalt) { |
| SAM("ERROR: no viable video_altsetting_on\n"); |
| return -ENOENT; |
| } else { |
| peasycap->video_altsetting_on = okalt[isokalt - 1]; |
| JOM(4, "%i=video_altsetting_on <====\n", |
| peasycap->video_altsetting_on); |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * DECIDE THE VIDEO STREAMING PARAMETERS |
| */ |
| /*---------------------------------------------------------------------------*/ |
| peasycap->video_endpointnumber = okepn[isokalt - 1]; |
| JOM(4, "%i=video_endpointnumber\n", peasycap->video_endpointnumber); |
| maxpacketsize = okmps[isokalt - 1]; |
| |
| peasycap->video_isoc_maxframesize = |
| min(maxpacketsize, USB_2_0_MAXPACKETSIZE); |
| if (0 >= peasycap->video_isoc_maxframesize) { |
| SAM("ERROR: bad video_isoc_maxframesize\n"); |
| SAM(" possibly because port is USB 1.1\n"); |
| return -ENOENT; |
| } |
| JOM(4, "%i=video_isoc_maxframesize\n", |
| peasycap->video_isoc_maxframesize); |
| |
| peasycap->video_isoc_framesperdesc = VIDEO_ISOC_FRAMESPERDESC; |
| JOM(4, "%i=video_isoc_framesperdesc\n", |
| peasycap->video_isoc_framesperdesc); |
| if (0 >= peasycap->video_isoc_framesperdesc) { |
| SAM("ERROR: bad video_isoc_framesperdesc\n"); |
| return -ENOENT; |
| } |
| peasycap->video_isoc_buffer_size = |
| peasycap->video_isoc_maxframesize * |
| peasycap->video_isoc_framesperdesc; |
| JOM(4, "%i=video_isoc_buffer_size\n", |
| peasycap->video_isoc_buffer_size); |
| if ((PAGE_SIZE << VIDEO_ISOC_ORDER) < |
| peasycap->video_isoc_buffer_size) { |
| SAM("MISTAKE: peasycap->video_isoc_buffer_size too big\n"); |
| return -EFAULT; |
| } |
| /*---------------------------------------------------------------------------*/ |
| if (-1 == peasycap->video_interface) { |
| SAM("MISTAKE: video_interface is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->video_altsetting_on) { |
| SAM("MISTAKE: video_altsetting_on is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->video_altsetting_off) { |
| SAM("MISTAKE: video_interface_off is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->video_endpointnumber) { |
| SAM("MISTAKE: video_endpointnumber is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->video_isoc_maxframesize) { |
| SAM("MISTAKE: video_isoc_maxframesize is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->video_isoc_buffer_size) { |
| SAM("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); |
| /*---------------------------------------------------------------------------*/ |
| JOM(4, "allocating %i frame buffers of size %li\n", |
| FRAME_BUFFER_MANY, (long int)FRAME_BUFFER_SIZE); |
| JOM(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 (peasycap->frame_buffer[k][m].pgo) |
| SAM("attempting to reallocate frame " |
| " buffers\n"); |
| else { |
| pbuf = (void *)__get_free_page(GFP_KERNEL); |
| if (!pbuf) { |
| SAM("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; |
| JOM(4, "allocation of frame buffers done: %i pages\n", k * |
| m); |
| /*---------------------------------------------------------------------------*/ |
| JOM(4, "allocating %i field buffers of size %li\n", |
| FIELD_BUFFER_MANY, (long int)FIELD_BUFFER_SIZE); |
| JOM(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 (peasycap->field_buffer[k][m].pgo) { |
| SAM("ERROR: attempting to reallocate " |
| "field buffers\n"); |
| } else { |
| pbuf = (void *) __get_free_page(GFP_KERNEL); |
| if (!pbuf) { |
| SAM("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; |
| JOM(4, "allocation of field buffers done: %i pages\n", k * |
| m); |
| /*---------------------------------------------------------------------------*/ |
| JOM(4, "allocating %i isoc video buffers of size %i\n", |
| VIDEO_ISOC_BUFFER_MANY, |
| peasycap->video_isoc_buffer_size); |
| JOM(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 (!pbuf) { |
| SAM("ERROR: Could not allocate isoc video buffer " |
| "%i\n", k); |
| return -ENOMEM; |
| } else |
| peasycap->allocation_video_page += |
| BIT(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; |
| } |
| JOM(4, "allocation of isoc video buffers done: %i pages\n", |
| k * (0x01 << VIDEO_ISOC_ORDER)); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * ALLOCATE AND INITIALIZE MULTIPLE struct urb ... |
| */ |
| /*---------------------------------------------------------------------------*/ |
| JOM(4, "allocating %i struct urb.\n", VIDEO_ISOC_BUFFER_MANY); |
| JOM(4, "using %i=peasycap->video_isoc_framesperdesc\n", |
| peasycap->video_isoc_framesperdesc); |
| JOM(4, "using %i=peasycap->video_isoc_maxframesize\n", |
| peasycap->video_isoc_maxframesize); |
| JOM(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 (!purb) { |
| SAM("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 (!pdata_urb) { |
| SAM("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) { |
| JOM(4, "initializing video urbs thus:\n"); |
| JOM(4, " purb->interval = 1;\n"); |
| JOM(4, " purb->dev = peasycap->pusb_device;\n"); |
| JOM(4, " purb->pipe = usb_rcvisocpipe" |
| "(peasycap->pusb_device,%i);\n", |
| peasycap->video_endpointnumber); |
| JOM(4, " purb->transfer_flags = URB_ISO_ASAP;\n"); |
| JOM(4, " purb->transfer_buffer = peasycap->" |
| "video_isoc_buffer[.].pgo;\n"); |
| JOM(4, " purb->transfer_buffer_length = %i;\n", |
| peasycap->video_isoc_buffer_size); |
| JOM(4, " purb->complete = easycap_complete;\n"); |
| JOM(4, " purb->context = peasycap;\n"); |
| JOM(4, " purb->start_frame = 0;\n"); |
| JOM(4, " purb->number_of_packets = %i;\n", |
| peasycap->video_isoc_framesperdesc); |
| JOM(4, " for (j = 0; j < %i; j++)\n", |
| peasycap->video_isoc_framesperdesc); |
| JOM(4, " {\n"); |
| JOM(4, " purb->iso_frame_desc[j].offset = j*%i;\n", |
| peasycap->video_isoc_maxframesize); |
| JOM(4, " purb->iso_frame_desc[j].length = %i;\n", |
| peasycap->video_isoc_maxframesize); |
| JOM(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; |
| } |
| } |
| JOM(4, "allocation of %i struct urb done.\n", k); |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * SAVE POINTER peasycap IN THIS INTERFACE. |
| */ |
| /*--------------------------------------------------------------------------*/ |
| usb_set_intfdata(intf, peasycap); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * IT IS ESSENTIAL TO INITIALIZE THE HARDWARE BEFORE, RATHER THAN AFTER, |
| * THE DEVICE IS REGISTERED, BECAUSE SOME VERSIONS OF THE videodev MODULE |
| * CALL easycap_open() IMMEDIATELY AFTER REGISTRATION, CAUSING A CLASH. |
| * BEWARE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| peasycap->ntsc = easycap_ntsc; |
| JOM(8, "defaulting initially to %s\n", |
| easycap_ntsc ? "NTSC" : "PAL"); |
| rc = reset(peasycap); |
| if (rc) { |
| SAM("ERROR: reset() rc = %i\n", rc); |
| return -EFAULT; |
| } |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * THE VIDEO DEVICE CAN BE REGISTERED NOW, AS IT IS READY. |
| */ |
| /*--------------------------------------------------------------------------*/ |
| if (v4l2_device_register(&intf->dev, &peasycap->v4l2_device)) { |
| SAM("v4l2_device_register() failed\n"); |
| return -ENODEV; |
| } |
| JOM(4, "registered device instance: %s\n", |
| peasycap->v4l2_device.name); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * FIXME |
| * |
| * |
| * THIS IS BELIEVED TO BE HARMLESS, BUT MAY WELL BE UNNECESSARY OR WRONG: |
| */ |
| /*---------------------------------------------------------------------------*/ |
| peasycap->video_device.v4l2_dev = NULL; |
| /*---------------------------------------------------------------------------*/ |
| |
| |
| strcpy(&peasycap->video_device.name[0], "easycapdc60"); |
| peasycap->video_device.fops = &v4l2_fops; |
| peasycap->video_device.minor = -1; |
| peasycap->video_device.release = (void *)(&videodev_release); |
| |
| video_set_drvdata(&(peasycap->video_device), (void *)peasycap); |
| |
| if (0 != (video_register_device(&(peasycap->video_device), |
| VFL_TYPE_GRABBER, -1))) { |
| err("Not able to register with videodev"); |
| videodev_release(&(peasycap->video_device)); |
| return -ENODEV; |
| } else { |
| (peasycap->registered_video)++; |
| SAM("registered with videodev: %i=minor\n", |
| peasycap->video_device.minor); |
| peasycap->minor = peasycap->video_device.minor; |
| } |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| |
| break; |
| } |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * INTERFACE 1 IS THE AUDIO CONTROL INTERFACE |
| * INTERFACE 2 IS THE AUDIO STREAMING INTERFACE |
| */ |
| /*--------------------------------------------------------------------------*/ |
| case 1: { |
| if (!peasycap) { |
| SAM("MISTAKE: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * SAVE POINTER peasycap IN INTERFACE 1 |
| */ |
| /*--------------------------------------------------------------------------*/ |
| usb_set_intfdata(intf, peasycap); |
| JOM(4, "no initialization required for interface %i\n", |
| interface->bInterfaceNumber); |
| break; |
| } |
| /*--------------------------------------------------------------------------*/ |
| case 2: { |
| if (!peasycap) { |
| SAM("MISTAKE: peasycap is NULL\n"); |
| return -EFAULT; |
| } |
| if (!isokalt) { |
| SAM("ERROR: no viable audio_altsetting_on\n"); |
| return -ENOENT; |
| } else { |
| peasycap->audio_altsetting_on = okalt[isokalt - 1]; |
| JOM(4, "%i=audio_altsetting_on <====\n", |
| peasycap->audio_altsetting_on); |
| } |
| |
| peasycap->audio_endpointnumber = okepn[isokalt - 1]; |
| JOM(4, "%i=audio_endpointnumber\n", peasycap->audio_endpointnumber); |
| |
| peasycap->audio_isoc_maxframesize = okmps[isokalt - 1]; |
| JOM(4, "%i=audio_isoc_maxframesize\n", |
| peasycap->audio_isoc_maxframesize); |
| if (0 >= peasycap->audio_isoc_maxframesize) { |
| SAM("ERROR: bad audio_isoc_maxframesize\n"); |
| return -ENOENT; |
| } |
| if (9 == peasycap->audio_isoc_maxframesize) { |
| peasycap->ilk |= 0x02; |
| SAM("audio hardware is microphone\n"); |
| peasycap->microphone = true; |
| peasycap->audio_pages_per_fragment = |
| PAGES_PER_AUDIO_FRAGMENT; |
| } else if (256 == peasycap->audio_isoc_maxframesize) { |
| peasycap->ilk &= ~0x02; |
| SAM("audio hardware is AC'97\n"); |
| peasycap->microphone = false; |
| peasycap->audio_pages_per_fragment = |
| PAGES_PER_AUDIO_FRAGMENT; |
| } else { |
| SAM("hardware is unidentified:\n"); |
| SAM("%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); |
| |
| JOM(4, "%6i=AUDIO_FRAGMENT_MANY\n", AUDIO_FRAGMENT_MANY); |
| JOM(4, "%6i=audio_pages_per_fragment\n", |
| peasycap->audio_pages_per_fragment); |
| JOM(4, "%6i=audio_bytes_per_fragment\n", |
| peasycap->audio_bytes_per_fragment); |
| JOM(4, "%6i=audio_buffer_page_many\n", |
| peasycap->audio_buffer_page_many); |
| |
| peasycap->audio_isoc_framesperdesc = AUDIO_ISOC_FRAMESPERDESC; |
| |
| JOM(4, "%i=audio_isoc_framesperdesc\n", |
| peasycap->audio_isoc_framesperdesc); |
| if (0 >= peasycap->audio_isoc_framesperdesc) { |
| SAM("ERROR: bad audio_isoc_framesperdesc\n"); |
| return -ENOENT; |
| } |
| |
| peasycap->audio_isoc_buffer_size = |
| peasycap->audio_isoc_maxframesize * |
| peasycap->audio_isoc_framesperdesc; |
| JOM(4, "%i=audio_isoc_buffer_size\n", |
| peasycap->audio_isoc_buffer_size); |
| if (AUDIO_ISOC_BUFFER_SIZE < peasycap->audio_isoc_buffer_size) { |
| SAM("MISTAKE: audio_isoc_buffer_size bigger " |
| "than %li=AUDIO_ISOC_BUFFER_SIZE\n", |
| AUDIO_ISOC_BUFFER_SIZE); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->audio_interface) { |
| SAM("MISTAKE: audio_interface is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->audio_altsetting_on) { |
| SAM("MISTAKE: audio_altsetting_on is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->audio_altsetting_off) { |
| SAM("MISTAKE: audio_interface_off is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->audio_endpointnumber) { |
| SAM("MISTAKE: audio_endpointnumber is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->audio_isoc_maxframesize) { |
| SAM("MISTAKE: audio_isoc_maxframesize is unset\n"); |
| return -EFAULT; |
| } |
| if (-1 == peasycap->audio_isoc_buffer_size) { |
| SAM("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); |
| |
| /*---------------------------------------------------------------------------*/ |
| JOM(4, "allocating %i isoc audio buffers of size %i\n", |
| AUDIO_ISOC_BUFFER_MANY, |
| peasycap->audio_isoc_buffer_size); |
| JOM(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 (!pbuf) { |
| SAM("ERROR: Could not allocate isoc audio buffer " |
| "%i\n", k); |
| return -ENOMEM; |
| } else |
| peasycap->allocation_audio_page += |
| BIT(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; |
| } |
| JOM(4, "allocation of isoc audio buffers done.\n"); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * ALLOCATE AND INITIALIZE MULTIPLE struct urb ... |
| */ |
| /*---------------------------------------------------------------------------*/ |
| JOM(4, "allocating %i struct urb.\n", AUDIO_ISOC_BUFFER_MANY); |
| JOM(4, "using %i=peasycap->audio_isoc_framesperdesc\n", |
| peasycap->audio_isoc_framesperdesc); |
| JOM(4, "using %i=peasycap->audio_isoc_maxframesize\n", |
| peasycap->audio_isoc_maxframesize); |
| JOM(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 (!purb) { |
| SAM("ERROR: usb_alloc_urb returned NULL for buffer " |
| "%i\n", k); |
| return -ENOMEM; |
| } |
| peasycap->allocation_audio_urb += 1 ; |
| /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ |
| pdata_urb = kzalloc(sizeof(struct data_urb), GFP_KERNEL); |
| if (!pdata_urb) { |
| SAM("ERROR: Could not allocate struct data_urb.\n"); |
| return -ENOMEM; |
| } |
| 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) { |
| JOM(4, "initializing audio urbs thus:\n"); |
| JOM(4, " purb->interval = 1;\n"); |
| JOM(4, " purb->dev = peasycap->pusb_device;\n"); |
| JOM(4, " purb->pipe = usb_rcvisocpipe(peasycap->" |
| "pusb_device,%i);\n", |
| peasycap->audio_endpointnumber); |
| JOM(4, " purb->transfer_flags = URB_ISO_ASAP;\n"); |
| JOM(4, " purb->transfer_buffer = " |
| "peasycap->audio_isoc_buffer[.].pgo;\n"); |
| JOM(4, " purb->transfer_buffer_length = %i;\n", |
| peasycap->audio_isoc_buffer_size); |
| JOM(4, " purb->complete = easycap_alsa_complete;\n"); |
| JOM(4, " purb->context = peasycap;\n"); |
| JOM(4, " purb->start_frame = 0;\n"); |
| JOM(4, " purb->number_of_packets = %i;\n", |
| peasycap->audio_isoc_framesperdesc); |
| JOM(4, " for (j = 0; j < %i; j++)\n", |
| peasycap->audio_isoc_framesperdesc); |
| JOM(4, " {\n"); |
| JOM(4, " purb->iso_frame_desc[j].offset = j*%i;\n", |
| peasycap->audio_isoc_maxframesize); |
| JOM(4, " purb->iso_frame_desc[j].length = %i;\n", |
| peasycap->audio_isoc_maxframesize); |
| JOM(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 = easycap_alsa_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; |
| } |
| } |
| JOM(4, "allocation of %i struct urb done.\n", k); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * SAVE POINTER peasycap IN THIS INTERFACE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| usb_set_intfdata(intf, peasycap); |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * THE AUDIO DEVICE CAN BE REGISTERED NOW, AS IT IS READY. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| JOM(4, "initializing ALSA card\n"); |
| |
| rc = easycap_alsa_probe(peasycap); |
| if (rc) { |
| err("easycap_alsa_probe() rc = %i\n", rc); |
| return -ENODEV; |
| } |
| |
| |
| JOM(8, "kref_get() with %i=kref.refcount.counter\n", |
| peasycap->kref.refcount.counter); |
| kref_get(&peasycap->kref); |
| peasycap->registered_audio++; |
| break; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * INTERFACES OTHER THAN 0, 1 AND 2 ARE UNEXPECTED |
| */ |
| /*---------------------------------------------------------------------------*/ |
| default: |
| JOM(4, "ERROR: unexpected interface %i\n", bInterfaceNumber); |
| return -EINVAL; |
| } |
| SAM("ends successfully for interface %i\n", bInterfaceNumber); |
| return 0; |
| } |
| /*****************************************************************************/ |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * WHEN THIS FUNCTION IS CALLED THE EasyCAP HAS ALREADY BEEN PHYSICALLY |
| * UNPLUGGED. HENCE peasycap->pusb_device IS NO LONGER VALID. |
| * |
| * THIS FUNCTION AFFECTS ALSA. BEWARE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| static 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, kd; |
| |
| JOT(4, "\n"); |
| |
| pusb_host_interface = pusb_interface->cur_altsetting; |
| if (!pusb_host_interface) { |
| JOT(4, "ERROR: pusb_host_interface is NULL\n"); |
| return; |
| } |
| pusb_interface_descriptor = &(pusb_host_interface->desc); |
| if (!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); |
| |
| if (1 == bInterfaceNumber) |
| return; |
| |
| peasycap = usb_get_intfdata(pusb_interface); |
| if (!peasycap) { |
| SAY("ERROR: peasycap is NULL\n"); |
| return; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * IF THE WAIT QUEUES ARE NOT CLEARED A DEADLOCK IS POSSIBLE. BEWARE. |
| */ |
| /*---------------------------------------------------------------------------*/ |
| peasycap->video_eof = 1; |
| peasycap->audio_eof = 1; |
| wake_up_interruptible(&(peasycap->wq_video)); |
| wake_up_interruptible(&(peasycap->wq_audio)); |
| /*---------------------------------------------------------------------------*/ |
| switch (bInterfaceNumber) { |
| case 0: { |
| if (peasycap->purb_video_head) { |
| JOM(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 (pdata_urb) { |
| if (pdata_urb->purb) { |
| usb_kill_urb(pdata_urb->purb); |
| m++; |
| } |
| } |
| } |
| JOM(4, "%i video urbs killed\n", m); |
| } |
| break; |
| } |
| /*---------------------------------------------------------------------------*/ |
| case 2: { |
| if (peasycap->purb_audio_head) { |
| JOM(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 (pdata_urb) { |
| if (pdata_urb->purb) { |
| usb_kill_urb(pdata_urb->purb); |
| m++; |
| } |
| } |
| } |
| JOM(4, "%i audio urbs killed\n", m); |
| } |
| break; |
| } |
| default: |
| break; |
| } |
| /*--------------------------------------------------------------------------*/ |
| /* |
| * DEREGISTER |
| * |
| * THIS PROCEDURE WILL BLOCK UNTIL easycap_poll(), VIDEO IOCTL AND AUDIO |
| * IOCTL ARE ALL UNLOCKED. IF THIS IS NOT DONE AN Oops CAN OCCUR WHEN |
| * AN EasyCAP IS UNPLUGGED WHILE THE URBS ARE RUNNING. BEWARE. |
| */ |
| /*--------------------------------------------------------------------------*/ |
| kd = isdongle(peasycap); |
| switch (bInterfaceNumber) { |
| case 0: { |
| if (0 <= kd && DONGLE_MANY > kd) { |
| wake_up_interruptible(&peasycap->wq_video); |
| JOM(4, "about to lock dongle[%i].mutex_video\n", kd); |
| if (mutex_lock_interruptible(&easycapdc60_dongle[kd]. |
| mutex_video)) { |
| SAY("ERROR: " |
| "cannot lock dongle[%i].mutex_video\n", kd); |
| return; |
| } |
| JOM(4, "locked dongle[%i].mutex_video\n", kd); |
| } else { |
| SAY("ERROR: %i=kd is bad: cannot lock dongle\n", kd); |
| } |
| /*---------------------------------------------------------------------------*/ |
| if (!peasycap->v4l2_device.name[0]) { |
| SAM("ERROR: peasycap->v4l2_device.name is empty\n"); |
| if (0 <= kd && DONGLE_MANY > kd) |
| mutex_unlock(&easycapdc60_dongle[kd].mutex_video); |
| return; |
| } |
| v4l2_device_disconnect(&peasycap->v4l2_device); |
| JOM(4, "v4l2_device_disconnect() OK\n"); |
| v4l2_device_unregister(&peasycap->v4l2_device); |
| JOM(4, "v4l2_device_unregister() OK\n"); |
| |
| video_unregister_device(&peasycap->video_device); |
| JOM(4, "intf[%i]: video_unregister_device() minor=%i\n", |
| bInterfaceNumber, minor); |
| peasycap->registered_video--; |
| /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ |
| |
| if (0 <= kd && DONGLE_MANY > kd) { |
| mutex_unlock(&easycapdc60_dongle[kd].mutex_video); |
| JOM(4, "unlocked dongle[%i].mutex_video\n", kd); |
| } |
| break; |
| } |
| case 2: { |
| if (0 <= kd && DONGLE_MANY > kd) { |
| wake_up_interruptible(&peasycap->wq_audio); |
| JOM(4, "about to lock dongle[%i].mutex_audio\n", kd); |
| if (mutex_lock_interruptible(&easycapdc60_dongle[kd]. |
| mutex_audio)) { |
| SAY("ERROR: " |
| "cannot lock dongle[%i].mutex_audio\n", kd); |
| return; |
| } |
| JOM(4, "locked dongle[%i].mutex_audio\n", kd); |
| } else |
| SAY("ERROR: %i=kd is bad: cannot lock dongle\n", kd); |
| if (0 != snd_card_free(peasycap->psnd_card)) { |
| SAY("ERROR: snd_card_free() failed\n"); |
| } else { |
| peasycap->psnd_card = NULL; |
| (peasycap->registered_audio)--; |
| } |
| if (0 <= kd && DONGLE_MANY > kd) { |
| mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); |
| JOM(4, "unlocked dongle[%i].mutex_audio\n", kd); |
| } |
| break; |
| } |
| default: |
| break; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * CALL easycap_delete() IF NO REMAINING REFERENCES TO peasycap |
| * (ALSO WHEN ALSA HAS BEEN IN USE) |
| */ |
| /*---------------------------------------------------------------------------*/ |
| if (!peasycap->kref.refcount.counter) { |
| SAM("ERROR: peasycap->kref.refcount.counter is zero " |
| "so cannot call kref_put()\n"); |
| SAM("ending unsuccessfully: may cause memory leak\n"); |
| return; |
| } |
| if (0 <= kd && DONGLE_MANY > kd) { |
| JOM(4, "about to lock dongle[%i].mutex_video\n", kd); |
| if (mutex_lock_interruptible(&easycapdc60_dongle[kd].mutex_video)) { |
| SAY("ERROR: cannot lock dongle[%i].mutex_video\n", kd); |
| SAM("ending unsuccessfully: may cause memory leak\n"); |
| return; |
| } |
| JOM(4, "locked dongle[%i].mutex_video\n", kd); |
| JOM(4, "about to lock dongle[%i].mutex_audio\n", kd); |
| if (mutex_lock_interruptible(&easycapdc60_dongle[kd].mutex_audio)) { |
| SAY("ERROR: cannot lock dongle[%i].mutex_audio\n", kd); |
| mutex_unlock(&(easycapdc60_dongle[kd].mutex_video)); |
| JOM(4, "unlocked dongle[%i].mutex_video\n", kd); |
| SAM("ending unsuccessfully: may cause memory leak\n"); |
| return; |
| } |
| JOM(4, "locked dongle[%i].mutex_audio\n", kd); |
| } |
| JOM(4, "intf[%i]: %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); |
| if (0 <= kd && DONGLE_MANY > kd) { |
| mutex_unlock(&(easycapdc60_dongle[kd].mutex_audio)); |
| JOT(4, "unlocked dongle[%i].mutex_audio\n", kd); |
| mutex_unlock(&easycapdc60_dongle[kd].mutex_video); |
| JOT(4, "unlocked dongle[%i].mutex_video\n", kd); |
| } |
| /*---------------------------------------------------------------------------*/ |
| JOM(4, "ends\n"); |
| return; |
| } |
| /*****************************************************************************/ |
| |
| /*---------------------------------------------------------------------------*/ |
| /* |
| * PARAMETERS APPLICABLE TO ENTIRE DRIVER, I.E. BOTH VIDEO AND AUDIO |
| */ |
| /*---------------------------------------------------------------------------*/ |
| static 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, |
| }; |
| |
| static int __init easycap_module_init(void) |
| { |
| int k, rc; |
| |
| printk(KERN_INFO "Easycap version: "EASYCAP_DRIVER_VERSION "\n"); |
| |
| JOT(4, "begins. %i=debug %i=bars %i=gain\n", |
| easycap_debug, easycap_bars, easycap_gain); |
| |
| mutex_init(&mutex_dongle); |
| for (k = 0; k < DONGLE_MANY; k++) { |
| easycapdc60_dongle[k].peasycap = NULL; |
| mutex_init(&easycapdc60_dongle[k].mutex_video); |
| mutex_init(&easycapdc60_dongle[k].mutex_audio); |
| } |
| rc = usb_register(&easycap_usb_driver); |
| if (rc) |
| printk(KERN_ERR "Easycap: usb_register failed rc=%d\n", rc); |
| |
| return rc; |
| } |
| /*****************************************************************************/ |
| static void __exit easycap_module_exit(void) |
| { |
| usb_deregister(&easycap_usb_driver); |
| } |
| /*****************************************************************************/ |
| |
| module_init(easycap_module_init); |
| module_exit(easycap_module_exit); |
| |
| /*****************************************************************************/ |