Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  1. /*
  2.  * VFW capture interface
  3.  * Copyright (c) 2006-2008 Ramiro Polla
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #include "libavutil/internal.h"
  23. #include "libavutil/log.h"
  24. #include "libavutil/opt.h"
  25. #include "libavutil/parseutils.h"
  26.  
  27. #include "libavformat/internal.h"
  28.  
  29. // windows.h must no be included before winsock2.h, and libavformat internal
  30. // headers may include winsock2.h
  31. #include <windows.h>
  32. // windows.h needs to be included before vfw.h
  33. #include <vfw.h>
  34.  
  35. #include "avdevice.h"
  36.  
  37. /* Some obsolete versions of MinGW32 before 4.0.0 lack this. */
  38. #ifndef HWND_MESSAGE
  39. #define HWND_MESSAGE ((HWND) -3)
  40. #endif
  41.  
  42. struct vfw_ctx {
  43.     const AVClass *class;
  44.     HWND hwnd;
  45.     HANDLE mutex;
  46.     HANDLE event;
  47.     AVPacketList *pktl;
  48.     unsigned int curbufsize;
  49.     unsigned int frame_num;
  50.     char *video_size;       /**< A string describing video size, set by a private option. */
  51.     char *framerate;        /**< Set by a private option. */
  52. };
  53.  
  54. static enum AVPixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount)
  55. {
  56.     switch(biCompression) {
  57.     case MKTAG('U', 'Y', 'V', 'Y'):
  58.         return AV_PIX_FMT_UYVY422;
  59.     case MKTAG('Y', 'U', 'Y', '2'):
  60.         return AV_PIX_FMT_YUYV422;
  61.     case MKTAG('I', '4', '2', '0'):
  62.         return AV_PIX_FMT_YUV420P;
  63.     case BI_RGB:
  64.         switch(biBitCount) { /* 1-8 are untested */
  65.             case 1:
  66.                 return AV_PIX_FMT_MONOWHITE;
  67.             case 4:
  68.                 return AV_PIX_FMT_RGB4;
  69.             case 8:
  70.                 return AV_PIX_FMT_RGB8;
  71.             case 16:
  72.                 return AV_PIX_FMT_RGB555;
  73.             case 24:
  74.                 return AV_PIX_FMT_BGR24;
  75.             case 32:
  76.                 return AV_PIX_FMT_RGB32;
  77.         }
  78.     }
  79.     return AV_PIX_FMT_NONE;
  80. }
  81.  
  82. static enum AVCodecID vfw_codecid(DWORD biCompression)
  83. {
  84.     switch(biCompression) {
  85.     case MKTAG('d', 'v', 's', 'd'):
  86.         return AV_CODEC_ID_DVVIDEO;
  87.     case MKTAG('M', 'J', 'P', 'G'):
  88.     case MKTAG('m', 'j', 'p', 'g'):
  89.         return AV_CODEC_ID_MJPEG;
  90.     }
  91.     return AV_CODEC_ID_NONE;
  92. }
  93.  
  94. #define dstruct(pctx, sname, var, type) \
  95.     av_log(pctx, AV_LOG_DEBUG, #var":\t%"type"\n", sname->var)
  96.  
  97. static void dump_captureparms(AVFormatContext *s, CAPTUREPARMS *cparms)
  98. {
  99.     av_log(s, AV_LOG_DEBUG, "CAPTUREPARMS\n");
  100.     dstruct(s, cparms, dwRequestMicroSecPerFrame, "lu");
  101.     dstruct(s, cparms, fMakeUserHitOKToCapture, "d");
  102.     dstruct(s, cparms, wPercentDropForError, "u");
  103.     dstruct(s, cparms, fYield, "d");
  104.     dstruct(s, cparms, dwIndexSize, "lu");
  105.     dstruct(s, cparms, wChunkGranularity, "u");
  106.     dstruct(s, cparms, fUsingDOSMemory, "d");
  107.     dstruct(s, cparms, wNumVideoRequested, "u");
  108.     dstruct(s, cparms, fCaptureAudio, "d");
  109.     dstruct(s, cparms, wNumAudioRequested, "u");
  110.     dstruct(s, cparms, vKeyAbort, "u");
  111.     dstruct(s, cparms, fAbortLeftMouse, "d");
  112.     dstruct(s, cparms, fAbortRightMouse, "d");
  113.     dstruct(s, cparms, fLimitEnabled, "d");
  114.     dstruct(s, cparms, wTimeLimit, "u");
  115.     dstruct(s, cparms, fMCIControl, "d");
  116.     dstruct(s, cparms, fStepMCIDevice, "d");
  117.     dstruct(s, cparms, dwMCIStartTime, "lu");
  118.     dstruct(s, cparms, dwMCIStopTime, "lu");
  119.     dstruct(s, cparms, fStepCaptureAt2x, "d");
  120.     dstruct(s, cparms, wStepCaptureAverageFrames, "u");
  121.     dstruct(s, cparms, dwAudioBufferSize, "lu");
  122.     dstruct(s, cparms, fDisableWriteCache, "d");
  123.     dstruct(s, cparms, AVStreamMaster, "u");
  124. }
  125.  
  126. static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr)
  127. {
  128. #ifdef DEBUG
  129.     av_log(s, AV_LOG_DEBUG, "VIDEOHDR\n");
  130.     dstruct(s, vhdr, lpData, "p");
  131.     dstruct(s, vhdr, dwBufferLength, "lu");
  132.     dstruct(s, vhdr, dwBytesUsed, "lu");
  133.     dstruct(s, vhdr, dwTimeCaptured, "lu");
  134.     dstruct(s, vhdr, dwUser, "lu");
  135.     dstruct(s, vhdr, dwFlags, "lu");
  136.     dstruct(s, vhdr, dwReserved[0], "lu");
  137.     dstruct(s, vhdr, dwReserved[1], "lu");
  138.     dstruct(s, vhdr, dwReserved[2], "lu");
  139.     dstruct(s, vhdr, dwReserved[3], "lu");
  140. #endif
  141. }
  142.  
  143. static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih)
  144. {
  145.     av_log(s, AV_LOG_DEBUG, "BITMAPINFOHEADER\n");
  146.     dstruct(s, bih, biSize, "lu");
  147.     dstruct(s, bih, biWidth, "ld");
  148.     dstruct(s, bih, biHeight, "ld");
  149.     dstruct(s, bih, biPlanes, "d");
  150.     dstruct(s, bih, biBitCount, "d");
  151.     dstruct(s, bih, biCompression, "lu");
  152.     av_log(s, AV_LOG_DEBUG, "    biCompression:\t\"%.4s\"\n",
  153.                    (char*) &bih->biCompression);
  154.     dstruct(s, bih, biSizeImage, "lu");
  155.     dstruct(s, bih, biXPelsPerMeter, "lu");
  156.     dstruct(s, bih, biYPelsPerMeter, "lu");
  157.     dstruct(s, bih, biClrUsed, "lu");
  158.     dstruct(s, bih, biClrImportant, "lu");
  159. }
  160.  
  161. static int shall_we_drop(AVFormatContext *s)
  162. {
  163.     struct vfw_ctx *ctx = s->priv_data;
  164.     static const uint8_t dropscore[] = {62, 75, 87, 100};
  165.     const int ndropscores = FF_ARRAY_ELEMS(dropscore);
  166.     unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer;
  167.  
  168.     if(dropscore[++ctx->frame_num%ndropscores] <= buffer_fullness) {
  169.         av_log(s, AV_LOG_ERROR,
  170.               "real-time buffer %d%% full! frame dropped!\n", buffer_fullness);
  171.         return 1;
  172.     }
  173.  
  174.     return 0;
  175. }
  176.  
  177. static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr)
  178. {
  179.     AVFormatContext *s;
  180.     struct vfw_ctx *ctx;
  181.     AVPacketList **ppktl, *pktl_next;
  182.  
  183.     s = (AVFormatContext *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
  184.     ctx = s->priv_data;
  185.  
  186.     dump_videohdr(s, vdhdr);
  187.  
  188.     if(shall_we_drop(s))
  189.         return FALSE;
  190.  
  191.     WaitForSingleObject(ctx->mutex, INFINITE);
  192.  
  193.     pktl_next = av_mallocz(sizeof(AVPacketList));
  194.     if(!pktl_next)
  195.         goto fail;
  196.  
  197.     if(av_new_packet(&pktl_next->pkt, vdhdr->dwBytesUsed) < 0) {
  198.         av_free(pktl_next);
  199.         goto fail;
  200.     }
  201.  
  202.     pktl_next->pkt.pts = vdhdr->dwTimeCaptured;
  203.     memcpy(pktl_next->pkt.data, vdhdr->lpData, vdhdr->dwBytesUsed);
  204.  
  205.     for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next);
  206.     *ppktl = pktl_next;
  207.  
  208.     ctx->curbufsize += vdhdr->dwBytesUsed;
  209.  
  210.     SetEvent(ctx->event);
  211.     ReleaseMutex(ctx->mutex);
  212.  
  213.     return TRUE;
  214. fail:
  215.     ReleaseMutex(ctx->mutex);
  216.     return FALSE;
  217. }
  218.  
  219. static int vfw_read_close(AVFormatContext *s)
  220. {
  221.     struct vfw_ctx *ctx = s->priv_data;
  222.     AVPacketList *pktl;
  223.  
  224.     if(ctx->hwnd) {
  225.         SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
  226.         SendMessage(ctx->hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0);
  227.         DestroyWindow(ctx->hwnd);
  228.     }
  229.     if(ctx->mutex)
  230.         CloseHandle(ctx->mutex);
  231.     if(ctx->event)
  232.         CloseHandle(ctx->event);
  233.  
  234.     pktl = ctx->pktl;
  235.     while (pktl) {
  236.         AVPacketList *next = pktl->next;
  237.         av_free_packet(&pktl->pkt);
  238.         av_free(pktl);
  239.         pktl = next;
  240.     }
  241.  
  242.     return 0;
  243. }
  244.  
  245. static int vfw_read_header(AVFormatContext *s)
  246. {
  247.     struct vfw_ctx *ctx = s->priv_data;
  248.     AVCodecContext *codec;
  249.     AVStream *st;
  250.     int devnum;
  251.     int bisize;
  252.     BITMAPINFO *bi = NULL;
  253.     CAPTUREPARMS cparms;
  254.     DWORD biCompression;
  255.     WORD biBitCount;
  256.     int ret;
  257.     AVRational framerate_q;
  258.  
  259.     if (!strcmp(s->filename, "list")) {
  260.         for (devnum = 0; devnum <= 9; devnum++) {
  261.             char driver_name[256];
  262.             char driver_ver[256];
  263.             ret = capGetDriverDescription(devnum,
  264.                                           driver_name, sizeof(driver_name),
  265.                                           driver_ver, sizeof(driver_ver));
  266.             if (ret) {
  267.                 av_log(s, AV_LOG_INFO, "Driver %d\n", devnum);
  268.                 av_log(s, AV_LOG_INFO, " %s\n", driver_name);
  269.                 av_log(s, AV_LOG_INFO, " %s\n", driver_ver);
  270.             }
  271.         }
  272.         return AVERROR(EIO);
  273.     }
  274.  
  275.     ctx->hwnd = capCreateCaptureWindow(NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, 0);
  276.     if(!ctx->hwnd) {
  277.         av_log(s, AV_LOG_ERROR, "Could not create capture window.\n");
  278.         return AVERROR(EIO);
  279.     }
  280.  
  281.     /* If atoi fails, devnum==0 and the default device is used */
  282.     devnum = atoi(s->filename);
  283.  
  284.     ret = SendMessage(ctx->hwnd, WM_CAP_DRIVER_CONNECT, devnum, 0);
  285.     if(!ret) {
  286.         av_log(s, AV_LOG_ERROR, "Could not connect to device.\n");
  287.         DestroyWindow(ctx->hwnd);
  288.         return AVERROR(ENODEV);
  289.     }
  290.  
  291.     SendMessage(ctx->hwnd, WM_CAP_SET_OVERLAY, 0, 0);
  292.     SendMessage(ctx->hwnd, WM_CAP_SET_PREVIEW, 0, 0);
  293.  
  294.     ret = SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0,
  295.                       (LPARAM) videostream_cb);
  296.     if(!ret) {
  297.         av_log(s, AV_LOG_ERROR, "Could not set video stream callback.\n");
  298.         goto fail;
  299.     }
  300.  
  301.     SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) s);
  302.  
  303.     st = avformat_new_stream(s, NULL);
  304.     if(!st) {
  305.         vfw_read_close(s);
  306.         return AVERROR(ENOMEM);
  307.     }
  308.  
  309.     /* Set video format */
  310.     bisize = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0);
  311.     if(!bisize)
  312.         goto fail;
  313.     bi = av_malloc(bisize);
  314.     if(!bi) {
  315.         vfw_read_close(s);
  316.         return AVERROR(ENOMEM);
  317.     }
  318.     ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi);
  319.     if(!ret)
  320.         goto fail;
  321.  
  322.     dump_bih(s, &bi->bmiHeader);
  323.  
  324.     ret = av_parse_video_rate(&framerate_q, ctx->framerate);
  325.     if (ret < 0) {
  326.         av_log(s, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", ctx->framerate);
  327.         goto fail;
  328.     }
  329.  
  330.     if (ctx->video_size) {
  331.         ret = av_parse_video_size(&bi->bmiHeader.biWidth, &bi->bmiHeader.biHeight, ctx->video_size);
  332.         if (ret < 0) {
  333.             av_log(s, AV_LOG_ERROR, "Couldn't parse video size.\n");
  334.             goto fail;
  335.         }
  336.     }
  337.  
  338.     if (0) {
  339.         /* For testing yet unsupported compressions
  340.          * Copy these values from user-supplied verbose information */
  341.         bi->bmiHeader.biWidth       = 320;
  342.         bi->bmiHeader.biHeight      = 240;
  343.         bi->bmiHeader.biPlanes      = 1;
  344.         bi->bmiHeader.biBitCount    = 12;
  345.         bi->bmiHeader.biCompression = MKTAG('I','4','2','0');
  346.         bi->bmiHeader.biSizeImage   = 115200;
  347.         dump_bih(s, &bi->bmiHeader);
  348.     }
  349.  
  350.     ret = SendMessage(ctx->hwnd, WM_CAP_SET_VIDEOFORMAT, bisize, (LPARAM) bi);
  351.     if(!ret) {
  352.         av_log(s, AV_LOG_ERROR, "Could not set Video Format.\n");
  353.         goto fail;
  354.     }
  355.  
  356.     biCompression = bi->bmiHeader.biCompression;
  357.     biBitCount = bi->bmiHeader.biBitCount;
  358.  
  359.     /* Set sequence setup */
  360.     ret = SendMessage(ctx->hwnd, WM_CAP_GET_SEQUENCE_SETUP, sizeof(cparms),
  361.                       (LPARAM) &cparms);
  362.     if(!ret)
  363.         goto fail;
  364.  
  365.     dump_captureparms(s, &cparms);
  366.  
  367.     cparms.fYield = 1; // Spawn a background thread
  368.     cparms.dwRequestMicroSecPerFrame =
  369.                                (framerate_q.den*1000000) / framerate_q.num;
  370.     cparms.fAbortLeftMouse = 0;
  371.     cparms.fAbortRightMouse = 0;
  372.     cparms.fCaptureAudio = 0;
  373.     cparms.vKeyAbort = 0;
  374.  
  375.     ret = SendMessage(ctx->hwnd, WM_CAP_SET_SEQUENCE_SETUP, sizeof(cparms),
  376.                       (LPARAM) &cparms);
  377.     if(!ret)
  378.         goto fail;
  379.  
  380.     codec = st->codec;
  381.     codec->time_base = av_inv_q(framerate_q);
  382.     codec->codec_type = AVMEDIA_TYPE_VIDEO;
  383.     codec->width  = bi->bmiHeader.biWidth;
  384.     codec->height = bi->bmiHeader.biHeight;
  385.     codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount);
  386.     if(codec->pix_fmt == AV_PIX_FMT_NONE) {
  387.         codec->codec_id = vfw_codecid(biCompression);
  388.         if(codec->codec_id == AV_CODEC_ID_NONE) {
  389.             av_log(s, AV_LOG_ERROR, "Unknown compression type. "
  390.                              "Please report verbose (-v 9) debug information.\n");
  391.             vfw_read_close(s);
  392.             return AVERROR_PATCHWELCOME;
  393.         }
  394.         codec->bits_per_coded_sample = biBitCount;
  395.     } else {
  396.         codec->codec_id = AV_CODEC_ID_RAWVIDEO;
  397.         if(biCompression == BI_RGB) {
  398.             codec->bits_per_coded_sample = biBitCount;
  399.             codec->extradata = av_malloc(9 + AV_INPUT_BUFFER_PADDING_SIZE);
  400.             if (codec->extradata) {
  401.                 codec->extradata_size = 9;
  402.                 memcpy(codec->extradata, "BottomUp", 9);
  403.             }
  404.         }
  405.     }
  406.  
  407.     av_freep(&bi);
  408.  
  409.     avpriv_set_pts_info(st, 32, 1, 1000);
  410.  
  411.     ctx->mutex = CreateMutex(NULL, 0, NULL);
  412.     if(!ctx->mutex) {
  413.         av_log(s, AV_LOG_ERROR, "Could not create Mutex.\n" );
  414.         goto fail;
  415.     }
  416.     ctx->event = CreateEvent(NULL, 1, 0, NULL);
  417.     if(!ctx->event) {
  418.         av_log(s, AV_LOG_ERROR, "Could not create Event.\n" );
  419.         goto fail;
  420.     }
  421.  
  422.     ret = SendMessage(ctx->hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0);
  423.     if(!ret) {
  424.         av_log(s, AV_LOG_ERROR, "Could not start capture sequence.\n" );
  425.         goto fail;
  426.     }
  427.  
  428.     return 0;
  429.  
  430. fail:
  431.     av_freep(&bi);
  432.     vfw_read_close(s);
  433.     return AVERROR(EIO);
  434. }
  435.  
  436. static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt)
  437. {
  438.     struct vfw_ctx *ctx = s->priv_data;
  439.     AVPacketList *pktl = NULL;
  440.  
  441.     while(!pktl) {
  442.         WaitForSingleObject(ctx->mutex, INFINITE);
  443.         pktl = ctx->pktl;
  444.         if(ctx->pktl) {
  445.             *pkt = ctx->pktl->pkt;
  446.             ctx->pktl = ctx->pktl->next;
  447.             av_free(pktl);
  448.         }
  449.         ResetEvent(ctx->event);
  450.         ReleaseMutex(ctx->mutex);
  451.         if(!pktl) {
  452.             if(s->flags & AVFMT_FLAG_NONBLOCK) {
  453.                 return AVERROR(EAGAIN);
  454.             } else {
  455.                 WaitForSingleObject(ctx->event, INFINITE);
  456.             }
  457.         }
  458.     }
  459.  
  460.     ctx->curbufsize -= pkt->size;
  461.  
  462.     return pkt->size;
  463. }
  464.  
  465. #define OFFSET(x) offsetof(struct vfw_ctx, x)
  466. #define DEC AV_OPT_FLAG_DECODING_PARAM
  467. static const AVOption options[] = {
  468.     { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
  469.     { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC },
  470.     { NULL },
  471. };
  472.  
  473. static const AVClass vfw_class = {
  474.     .class_name = "VFW indev",
  475.     .item_name  = av_default_item_name,
  476.     .option     = options,
  477.     .version    = LIBAVUTIL_VERSION_INT,
  478.     .category   = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT
  479. };
  480.  
  481. AVInputFormat ff_vfwcap_demuxer = {
  482.     .name           = "vfwcap",
  483.     .long_name      = NULL_IF_CONFIG_SMALL("VfW video capture"),
  484.     .priv_data_size = sizeof(struct vfw_ctx),
  485.     .read_header    = vfw_read_header,
  486.     .read_packet    = vfw_read_packet,
  487.     .read_close     = vfw_read_close,
  488.     .flags          = AVFMT_NOFILE,
  489.     .priv_class     = &vfw_class,
  490. };
  491.