Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/usb/media/usbvideo.h b/drivers/usb/media/usbvideo.h
new file mode 100644
index 0000000..6c390a1
--- /dev/null
+++ b/drivers/usb/media/usbvideo.h
@@ -0,0 +1,393 @@
+/*
+ * This program 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, or (at your option)
+ * any later version.
+ *
+ * This program 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 program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#ifndef usbvideo_h
+#define usbvideo_h
+
+#include <linux/config.h>
+#include <linux/videodev.h>
+#include <linux/usb.h>
+
+/* Most helpful debugging aid */
+#define assert(expr) ((void) ((expr) ? 0 : (err("assert failed at line %d",__LINE__))))
+
+#define USBVIDEO_REPORT_STATS 1 /* Set to 0 to block statistics on close */
+
+/* Bit flags (options) */
+#define FLAGS_RETRY_VIDIOCSYNC (1 << 0)
+#define FLAGS_MONOCHROME (1 << 1)
+#define FLAGS_DISPLAY_HINTS (1 << 2)
+#define FLAGS_OVERLAY_STATS (1 << 3)
+#define FLAGS_FORCE_TESTPATTERN (1 << 4)
+#define FLAGS_SEPARATE_FRAMES (1 << 5)
+#define FLAGS_CLEAN_FRAMES (1 << 6)
+#define FLAGS_NO_DECODING (1 << 7)
+
+/* Bit flags for frames (apply to the frame where they are specified) */
+#define USBVIDEO_FRAME_FLAG_SOFTWARE_CONTRAST (1 << 0)
+
+/* Camera capabilities (maximum) */
+#define CAMERA_URB_FRAMES 32
+#define CAMERA_MAX_ISO_PACKET 1023 /* 1022 actually sent by camera */
+#define FRAMES_PER_DESC (CAMERA_URB_FRAMES)
+#define FRAME_SIZE_PER_DESC (CAMERA_MAX_ISO_PACKET)
+
+/* This macro restricts an int variable to an inclusive range */
+#define RESTRICT_TO_RANGE(v,mi,ma) { if ((v) < (mi)) (v) = (mi); else if ((v) > (ma)) (v) = (ma); }
+
+#define V4L_BYTES_PER_PIXEL 3 /* Because we produce RGB24 */
+
+/*
+ * Use this macro to construct constants for different video sizes.
+ * We have to deal with different video sizes that have to be
+ * configured in the device or compared against when we receive
+ * a data. Normally one would define a bunch of VIDEOSIZE_x_by_y
+ * #defines and that's the end of story. However this solution
+ * does not allow to convert between real pixel sizes and the
+ * constant (integer) value that may be used to tag a frame or
+ * whatever. The set of macros below constructs videosize constants
+ * from the pixel size and allows to reconstruct the pixel size
+ * from the combined value later.
+ */
+#define VIDEOSIZE(x,y) (((x) & 0xFFFFL) | (((y) & 0xFFFFL) << 16))
+#define VIDEOSIZE_X(vs) ((vs) & 0xFFFFL)
+#define VIDEOSIZE_Y(vs) (((vs) >> 16) & 0xFFFFL)
+typedef unsigned long videosize_t;
+
+/*
+ * This macro checks if the camera is still operational. The 'uvd'
+ * pointer must be valid, uvd->dev must be valid, we are not
+ * removing the device and the device has not erred on us.
+ */
+#define CAMERA_IS_OPERATIONAL(uvd) (\
+ (uvd != NULL) && \
+ ((uvd)->dev != NULL) && \
+ ((uvd)->last_error == 0) && \
+ (!(uvd)->remove_pending))
+
+/*
+ * We use macros to do YUV -> RGB conversion because this is
+ * very important for speed and totally unimportant for size.
+ *
+ * YUV -> RGB Conversion
+ * ---------------------
+ *
+ * B = 1.164*(Y-16) + 2.018*(V-128)
+ * G = 1.164*(Y-16) - 0.813*(U-128) - 0.391*(V-128)
+ * R = 1.164*(Y-16) + 1.596*(U-128)
+ *
+ * If you fancy integer arithmetics (as you should), hear this:
+ *
+ * 65536*B = 76284*(Y-16) + 132252*(V-128)
+ * 65536*G = 76284*(Y-16) - 53281*(U-128) - 25625*(V-128)
+ * 65536*R = 76284*(Y-16) + 104595*(U-128)
+ *
+ * Make sure the output values are within [0..255] range.
+ */
+#define LIMIT_RGB(x) (((x) < 0) ? 0 : (((x) > 255) ? 255 : (x)))
+#define YUV_TO_RGB_BY_THE_BOOK(my,mu,mv,mr,mg,mb) { \
+ int mm_y, mm_yc, mm_u, mm_v, mm_r, mm_g, mm_b; \
+ mm_y = (my) - 16; \
+ mm_u = (mu) - 128; \
+ mm_v = (mv) - 128; \
+ mm_yc= mm_y * 76284; \
+ mm_b = (mm_yc + 132252*mm_v ) >> 16; \
+ mm_g = (mm_yc - 53281*mm_u - 25625*mm_v ) >> 16; \
+ mm_r = (mm_yc + 104595*mm_u ) >> 16; \
+ mb = LIMIT_RGB(mm_b); \
+ mg = LIMIT_RGB(mm_g); \
+ mr = LIMIT_RGB(mm_r); \
+}
+
+#define RING_QUEUE_SIZE (128*1024) /* Must be a power of 2 */
+#define RING_QUEUE_ADVANCE_INDEX(rq,ind,n) (rq)->ind = ((rq)->ind + (n)) & ((rq)->length-1)
+#define RING_QUEUE_DEQUEUE_BYTES(rq,n) RING_QUEUE_ADVANCE_INDEX(rq,ri,n)
+#define RING_QUEUE_PEEK(rq,ofs) ((rq)->queue[((ofs) + (rq)->ri) & ((rq)->length-1)])
+
+struct RingQueue {
+ unsigned char *queue; /* Data from the Isoc data pump */
+ int length; /* How many bytes allocated for the queue */
+ int wi; /* That's where we write */
+ int ri; /* Read from here until you hit write index */
+ wait_queue_head_t wqh; /* Processes waiting */
+};
+
+enum ScanState {
+ ScanState_Scanning, /* Scanning for header */
+ ScanState_Lines /* Parsing lines */
+};
+
+/* Completion states of the data parser */
+enum ParseState {
+ scan_Continue, /* Just parse next item */
+ scan_NextFrame, /* Frame done, send it to V4L */
+ scan_Out, /* Not enough data for frame */
+ scan_EndParse /* End parsing */
+};
+
+enum FrameState {
+ FrameState_Unused, /* Unused (no MCAPTURE) */
+ FrameState_Ready, /* Ready to start grabbing */
+ FrameState_Grabbing, /* In the process of being grabbed into */
+ FrameState_Done, /* Finished grabbing, but not been synced yet */
+ FrameState_Done_Hold, /* Are syncing or reading */
+ FrameState_Error, /* Something bad happened while processing */
+};
+
+/*
+ * Some frames may contain only even or odd lines. This type
+ * specifies what type of deinterlacing is required.
+ */
+enum Deinterlace {
+ Deinterlace_None=0,
+ Deinterlace_FillOddLines,
+ Deinterlace_FillEvenLines
+};
+
+#define USBVIDEO_NUMFRAMES 2 /* How many frames we work with */
+#define USBVIDEO_NUMSBUF 2 /* How many URBs linked in a ring */
+
+/* This structure represents one Isoc request - URB and buffer */
+struct usbvideo_sbuf {
+ char *data;
+ struct urb *urb;
+};
+
+struct usbvideo_frame {
+ char *data; /* Frame buffer */
+ unsigned long header; /* Significant bits from the header */
+
+ videosize_t canvas; /* The canvas (max. image) allocated */
+ videosize_t request; /* That's what the application asked for */
+ unsigned short palette; /* The desired format */
+
+ enum FrameState frameState;/* State of grabbing */
+ enum ScanState scanstate; /* State of scanning */
+ enum Deinterlace deinterlace;
+ int flags; /* USBVIDEO_FRAME_FLAG_xxx bit flags */
+
+ int curline; /* Line of frame we're working on */
+
+ long seqRead_Length; /* Raw data length of frame */
+ long seqRead_Index; /* Amount of data that has been already read */
+
+ void *user; /* Additional data that user may need */
+};
+
+/* Statistics that can be overlaid on screen */
+struct usbvideo_statistics {
+ unsigned long frame_num; /* Sequential number of the frame */
+ unsigned long urb_count; /* How many URBs we received so far */
+ unsigned long urb_length; /* Length of last URB */
+ unsigned long data_count; /* How many bytes we received */
+ unsigned long header_count; /* How many frame headers we found */
+ unsigned long iso_skip_count; /* How many empty ISO packets received */
+ unsigned long iso_err_count; /* How many bad ISO packets received */
+};
+
+struct usbvideo;
+
+struct uvd {
+ struct video_device vdev; /* Must be the first field! */
+ struct usb_device *dev;
+ struct usbvideo *handle; /* Points back to the struct usbvideo */
+ void *user_data; /* Camera-dependent data */
+ int user_size; /* Size of that camera-dependent data */
+ int debug; /* Debug level for usbvideo */
+ unsigned char iface; /* Video interface number */
+ unsigned char video_endp;
+ unsigned char ifaceAltActive;
+ unsigned char ifaceAltInactive; /* Alt settings */
+ unsigned long flags; /* FLAGS_USBVIDEO_xxx */
+ unsigned long paletteBits; /* Which palettes we accept? */
+ unsigned short defaultPalette; /* What palette to use for read() */
+ struct semaphore lock;
+ int user; /* user count for exclusive use */
+
+ videosize_t videosize; /* Current setting */
+ videosize_t canvas; /* This is the width,height of the V4L canvas */
+ int max_frame_size; /* Bytes in one video frame */
+
+ int uvd_used; /* Is this structure in use? */
+ int streaming; /* Are we streaming Isochronous? */
+ int grabbing; /* Are we grabbing? */
+ int settingsAdjusted; /* Have we adjusted contrast etc.? */
+ int last_error; /* What calamity struck us? */
+
+ char *fbuf; /* Videodev buffer area */
+ int fbuf_size; /* Videodev buffer size */
+
+ int curframe;
+ int iso_packet_len; /* Videomode-dependent, saves bus bandwidth */
+
+ struct RingQueue dp; /* Isoc data pump */
+ struct usbvideo_frame frame[USBVIDEO_NUMFRAMES];
+ struct usbvideo_sbuf sbuf[USBVIDEO_NUMSBUF];
+
+ volatile int remove_pending; /* If set then about to exit */
+
+ struct video_picture vpic, vpic_old; /* Picture settings */
+ struct video_capability vcap; /* Video capabilities */
+ struct video_channel vchan; /* May be used for tuner support */
+ struct usbvideo_statistics stats;
+ char videoName[32]; /* Holds name like "video7" */
+};
+
+/*
+ * usbvideo callbacks (virtual methods). They are set when usbvideo
+ * services are registered. All of these default to NULL, except those
+ * that default to usbvideo-provided methods.
+ */
+struct usbvideo_cb {
+ int (*probe)(struct usb_interface *, const struct usb_device_id *);
+ void (*userFree)(struct uvd *);
+ void (*disconnect)(struct usb_interface *);
+ int (*setupOnOpen)(struct uvd *);
+ void (*videoStart)(struct uvd *);
+ void (*videoStop)(struct uvd *);
+ void (*processData)(struct uvd *, struct usbvideo_frame *);
+ void (*postProcess)(struct uvd *, struct usbvideo_frame *);
+ void (*adjustPicture)(struct uvd *);
+ int (*getFPS)(struct uvd *);
+ int (*overlayHook)(struct uvd *, struct usbvideo_frame *);
+ int (*getFrame)(struct uvd *, int);
+ int (*startDataPump)(struct uvd *uvd);
+ void (*stopDataPump)(struct uvd *uvd);
+ int (*setVideoMode)(struct uvd *uvd, struct video_window *vw);
+};
+
+struct usbvideo {
+ int num_cameras; /* As allocated */
+ struct usb_driver usbdrv; /* Interface to the USB stack */
+ char drvName[80]; /* Driver name */
+ struct semaphore lock; /* Mutex protecting camera structures */
+ struct usbvideo_cb cb; /* Table of callbacks (virtual methods) */
+ struct video_device vdt; /* Video device template */
+ struct uvd *cam; /* Array of camera structures */
+ struct module *md_module; /* Minidriver module */
+};
+
+
+/*
+ * This macro retrieves callback address from the struct uvd object.
+ * No validity checks are done here, so be sure to check the
+ * callback beforehand with VALID_CALLBACK.
+ */
+#define GET_CALLBACK(uvd,cbName) ((uvd)->handle->cb.cbName)
+
+/*
+ * This macro returns either callback pointer or NULL. This is safe
+ * macro, meaning that most of components of data structures involved
+ * may be NULL - this only results in NULL being returned. You may
+ * wish to use this macro to make sure that the callback is callable.
+ * However keep in mind that those checks take time.
+ */
+#define VALID_CALLBACK(uvd,cbName) ((((uvd) != NULL) && \
+ ((uvd)->handle != NULL)) ? GET_CALLBACK(uvd,cbName) : NULL)
+
+int RingQueue_Dequeue(struct RingQueue *rq, unsigned char *dst, int len);
+int RingQueue_Enqueue(struct RingQueue *rq, const unsigned char *cdata, int n);
+void RingQueue_WakeUpInterruptible(struct RingQueue *rq);
+void RingQueue_Flush(struct RingQueue *rq);
+
+static inline int RingQueue_GetLength(const struct RingQueue *rq)
+{
+ return (rq->wi - rq->ri + rq->length) & (rq->length-1);
+}
+
+static inline int RingQueue_GetFreeSpace(const struct RingQueue *rq)
+{
+ return rq->length - RingQueue_GetLength(rq);
+}
+
+void usbvideo_DrawLine(
+ struct usbvideo_frame *frame,
+ int x1, int y1,
+ int x2, int y2,
+ unsigned char cr, unsigned char cg, unsigned char cb);
+void usbvideo_HexDump(const unsigned char *data, int len);
+void usbvideo_SayAndWait(const char *what);
+void usbvideo_TestPattern(struct uvd *uvd, int fullframe, int pmode);
+
+/* Memory allocation routines */
+unsigned long usbvideo_kvirt_to_pa(unsigned long adr);
+
+int usbvideo_register(
+ struct usbvideo **pCams,
+ const int num_cams,
+ const int num_extra,
+ const char *driverName,
+ const struct usbvideo_cb *cbTable,
+ struct module *md,
+ const struct usb_device_id *id_table);
+struct uvd *usbvideo_AllocateDevice(struct usbvideo *cams);
+int usbvideo_RegisterVideoDevice(struct uvd *uvd);
+void usbvideo_Deregister(struct usbvideo **uvt);
+
+int usbvideo_v4l_initialize(struct video_device *dev);
+
+void usbvideo_DeinterlaceFrame(struct uvd *uvd, struct usbvideo_frame *frame);
+
+/*
+ * This code performs bounds checking - use it when working with
+ * new formats, or else you may get oopses all over the place.
+ * If pixel falls out of bounds then it gets shoved back (as close
+ * to place of offence as possible) and is painted bright red.
+ *
+ * There are two important concepts: frame width, height and
+ * V4L canvas width, height. The former is the area requested by
+ * the application -for this very frame-. The latter is the largest
+ * possible frame that we can serve (we advertise that via V4L ioctl).
+ * The frame data is expected to be formatted as lines of length
+ * VIDEOSIZE_X(fr->request), total VIDEOSIZE_Y(frame->request) lines.
+ */
+static inline void RGB24_PUTPIXEL(
+ struct usbvideo_frame *fr,
+ int ix, int iy,
+ unsigned char vr,
+ unsigned char vg,
+ unsigned char vb)
+{
+ register unsigned char *pf;
+ int limiter = 0, mx, my;
+ mx = ix;
+ my = iy;
+ if (mx < 0) {
+ mx=0;
+ limiter++;
+ } else if (mx >= VIDEOSIZE_X((fr)->request)) {
+ mx= VIDEOSIZE_X((fr)->request) - 1;
+ limiter++;
+ }
+ if (my < 0) {
+ my = 0;
+ limiter++;
+ } else if (my >= VIDEOSIZE_Y((fr)->request)) {
+ my = VIDEOSIZE_Y((fr)->request) - 1;
+ limiter++;
+ }
+ pf = (fr)->data + V4L_BYTES_PER_PIXEL*((iy)*VIDEOSIZE_X((fr)->request) + (ix));
+ if (limiter) {
+ *pf++ = 0;
+ *pf++ = 0;
+ *pf++ = 0xFF;
+ } else {
+ *pf++ = (vb);
+ *pf++ = (vg);
+ *pf++ = (vr);
+ }
+}
+
+#endif /* usbvideo_h */