release/src/router/ffmpeg/libavdevice/vfwcap.c

   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 "libavformat/avformat.h"
  23 #include <windows.h>
  24 #include <vfw.h>
  25
  26 //#define DEBUG_VFW
  27
  28 /* Defines for VFW missing from MinGW.
  29  * Remove this when MinGW incorporates them. */
  30 #define HWND_MESSAGE                ((HWND)-3)
  31
  32 #define BI_RGB                      0
  33
  34 /* End of missing MinGW defines */
  35
  36 struct vfw_ctx {
  37     HWND hwnd;
  38     HANDLE mutex;
  39     HANDLE event;
  40     AVPacketList *pktl;
  41     unsigned int curbufsize;
  42     unsigned int frame_num;
  43 };
  44
  45 static enum PixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount)
  46 {
  47     switch(biCompression) {
  48     case MKTAG('U', 'Y', 'V', 'Y'):
  49         return PIX_FMT_UYVY422;
  50     case MKTAG('Y', 'U', 'Y', '2'):
  51         return PIX_FMT_YUYV422;
  52     case MKTAG('I', '4', '2', '0'):
  53         return PIX_FMT_YUV420P;
  54     case BI_RGB:
  55         switch(biBitCount) { /* 1-8 are untested */
  56             case 1:
  57                 return PIX_FMT_MONOWHITE;
  58             case 4:
  59                 return PIX_FMT_RGB4;
  60             case 8:
  61                 return PIX_FMT_RGB8;
  62             case 16:
  63                 return PIX_FMT_RGB555;
  64             case 24:
  65                 return PIX_FMT_BGR24;
  66             case 32:
  67                 return PIX_FMT_RGB32;
  68         }
  69     }
  70     return PIX_FMT_NONE;
  71 }
  72
  73 static enum CodecID vfw_codecid(DWORD biCompression)
  74 {
  75     switch(biCompression) {
  76     case MKTAG('d', 'v', 's', 'd'):
  77         return CODEC_ID_DVVIDEO;
  78     case MKTAG('M', 'J', 'P', 'G'):
  79     case MKTAG('m', 'j', 'p', 'g'):
  80         return CODEC_ID_MJPEG;
  81     }
  82     return CODEC_ID_NONE;
  83 }
  84
  85 #define dstruct(pctx, sname, var, type) \
  86     av_log(pctx, AV_LOG_DEBUG, #var":\t%"type"\n", sname->var)
  87
  88 static void dump_captureparms(AVFormatContext *s, CAPTUREPARMS *cparms)
  89 {
  90     av_log(s, AV_LOG_DEBUG, "CAPTUREPARMS\n");
  91     dstruct(s, cparms, dwRequestMicroSecPerFrame, "lu");
  92     dstruct(s, cparms, fMakeUserHitOKToCapture, "d");
  93     dstruct(s, cparms, wPercentDropForError, "u");
  94     dstruct(s, cparms, fYield, "d");
  95     dstruct(s, cparms, dwIndexSize, "lu");
  96     dstruct(s, cparms, wChunkGranularity, "u");
  97     dstruct(s, cparms, fUsingDOSMemory, "d");
  98     dstruct(s, cparms, wNumVideoRequested, "u");
  99     dstruct(s, cparms, fCaptureAudio, "d");
 100     dstruct(s, cparms, wNumAudioRequested, "u");
 101     dstruct(s, cparms, vKeyAbort, "u");
 102     dstruct(s, cparms, fAbortLeftMouse, "d");
 103     dstruct(s, cparms, fAbortRightMouse, "d");
 104     dstruct(s, cparms, fLimitEnabled, "d");
 105     dstruct(s, cparms, wTimeLimit, "u");
 106     dstruct(s, cparms, fMCIControl, "d");
 107     dstruct(s, cparms, fStepMCIDevice, "d");
 108     dstruct(s, cparms, dwMCIStartTime, "lu");
 109     dstruct(s, cparms, dwMCIStopTime, "lu");
 110     dstruct(s, cparms, fStepCaptureAt2x, "d");
 111     dstruct(s, cparms, wStepCaptureAverageFrames, "u");
 112     dstruct(s, cparms, dwAudioBufferSize, "lu");
 113     dstruct(s, cparms, fDisableWriteCache, "d");
 114     dstruct(s, cparms, AVStreamMaster, "u");
 115 }
 116
 117 static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr)
 118 {
 119 #ifdef DEBUG_VFW
 120     av_log(s, AV_LOG_DEBUG, "VIDEOHDR\n");
 121     dstruct(s, vhdr, lpData, "p");
 122     dstruct(s, vhdr, dwBufferLength, "lu");
 123     dstruct(s, vhdr, dwBytesUsed, "lu");
 124     dstruct(s, vhdr, dwTimeCaptured, "lu");
 125     dstruct(s, vhdr, dwUser, "lu");
 126     dstruct(s, vhdr, dwFlags, "lu");
 127     dstruct(s, vhdr, dwReserved[0], "lu");
 128     dstruct(s, vhdr, dwReserved[1], "lu");
 129     dstruct(s, vhdr, dwReserved[2], "lu");
 130     dstruct(s, vhdr, dwReserved[3], "lu");
 131 #endif
 132 }
 133
 134 static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih)
 135 {
 136     av_log(s, AV_LOG_DEBUG, "BITMAPINFOHEADER\n");
 137     dstruct(s, bih, biSize, "lu");
 138     dstruct(s, bih, biWidth, "ld");
 139     dstruct(s, bih, biHeight, "ld");
 140     dstruct(s, bih, biPlanes, "d");
 141     dstruct(s, bih, biBitCount, "d");
 142     dstruct(s, bih, biCompression, "lu");
 143     av_log(s, AV_LOG_DEBUG, "    biCompression:\t\"%.4s\"\n",
 144                    (char*) &bih->biCompression);
 145     dstruct(s, bih, biSizeImage, "lu");
 146     dstruct(s, bih, biXPelsPerMeter, "lu");
 147     dstruct(s, bih, biYPelsPerMeter, "lu");
 148     dstruct(s, bih, biClrUsed, "lu");
 149     dstruct(s, bih, biClrImportant, "lu");
 150 }
 151
 152 static int shall_we_drop(AVFormatContext *s)
 153 {
 154     struct vfw_ctx *ctx = s->priv_data;
 155     const uint8_t dropscore[] = {62, 75, 87, 100};
 156     const int ndropscores = FF_ARRAY_ELEMS(dropscore);
 157     unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer;
 158
 159     if(dropscore[++ctx->frame_num%ndropscores] <= buffer_fullness) {
 160         av_log(s, AV_LOG_ERROR,
 161               "real-time buffer %d%% full! frame dropped!\n", buffer_fullness);
 162         return 1;
 163     }
 164
 165     return 0;
 166 }
 167
 168 static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr)
 169 {
 170     AVFormatContext *s;
 171     struct vfw_ctx *ctx;
 172     AVPacketList **ppktl, *pktl_next;
 173
 174     s = (AVFormatContext *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
 175     ctx = s->priv_data;
 176
 177     dump_videohdr(s, vdhdr);
 178
 179     if(shall_we_drop(s))
 180         return FALSE;
 181
 182     WaitForSingleObject(ctx->mutex, INFINITE);
 183
 184     pktl_next = av_mallocz(sizeof(AVPacketList));
 185     if(!pktl_next)
 186         goto fail;
 187
 188     if(av_new_packet(&pktl_next->pkt, vdhdr->dwBytesUsed) < 0) {
 189         av_free(pktl_next);
 190         goto fail;
 191     }
 192
 193     pktl_next->pkt.pts = vdhdr->dwTimeCaptured;
 194     memcpy(pktl_next->pkt.data, vdhdr->lpData, vdhdr->dwBytesUsed);
 195
 196     for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next);
 197     *ppktl = pktl_next;
 198
 199     ctx->curbufsize += vdhdr->dwBytesUsed;
 200
 201     SetEvent(ctx->event);
 202     ReleaseMutex(ctx->mutex);
 203
 204     return TRUE;
 205 fail:
 206     ReleaseMutex(ctx->mutex);
 207     return FALSE;
 208 }
 209
 210 static int vfw_read_close(AVFormatContext *s)
 211 {
 212     struct vfw_ctx *ctx = s->priv_data;
 213     AVPacketList *pktl;
 214
 215     if(ctx->hwnd) {
 216         SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
 217         SendMessage(ctx->hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0);
 218         DestroyWindow(ctx->hwnd);
 219     }
 220     if(ctx->mutex)
 221         CloseHandle(ctx->mutex);
 222     if(ctx->event)
 223         CloseHandle(ctx->event);
 224
 225     pktl = ctx->pktl;
 226     while (pktl) {
 227         AVPacketList *next = pktl->next;
 228         av_destruct_packet(&pktl->pkt);
 229         av_free(pktl);
 230         pktl = next;
 231     }
 232
 233     return 0;
 234 }
 235
 236 static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap)
 237 {
 238     struct vfw_ctx *ctx = s->priv_data;
 239     AVCodecContext *codec;
 240     AVStream *st;
 241     int devnum;
 242     int bisize;
 243     BITMAPINFO *bi;
 244     CAPTUREPARMS cparms;
 245     DWORD biCompression;
 246     WORD biBitCount;
 247     int width;
 248     int height;
 249     int ret;
 250
 251     if(!ap->time_base.den) {
 252         av_log(s, AV_LOG_ERROR, "A time base must be specified.\n");
 253         return AVERROR(EIO);
 254     }
 255
 256     ctx->hwnd = capCreateCaptureWindow(NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, 0);
 257     if(!ctx->hwnd) {
 258         av_log(s, AV_LOG_ERROR, "Could not create capture window.\n");
 259         return AVERROR(EIO);
 260     }
 261
 262     /* If atoi fails, devnum==0 and the default device is used */
 263     devnum = atoi(s->filename);
 264
 265     ret = SendMessage(ctx->hwnd, WM_CAP_DRIVER_CONNECT, devnum, 0);
 266     if(!ret) {
 267         av_log(s, AV_LOG_ERROR, "Could not connect to device.\n");
 268         DestroyWindow(ctx->hwnd);
 269         return AVERROR(ENODEV);
 270     }
 271
 272     SendMessage(ctx->hwnd, WM_CAP_SET_OVERLAY, 0, 0);
 273     SendMessage(ctx->hwnd, WM_CAP_SET_PREVIEW, 0, 0);
 274
 275     ret = SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0,
 276                       (LPARAM) videostream_cb);
 277     if(!ret) {
 278         av_log(s, AV_LOG_ERROR, "Could not set video stream callback.\n");
 279         goto fail_io;
 280     }
 281
 282     SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) s);
 283
 284     st = av_new_stream(s, 0);
 285     if(!st) {
 286         vfw_read_close(s);
 287         return AVERROR(ENOMEM);
 288     }
 289
 290     /* Set video format */
 291     bisize = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0);
 292     if(!bisize)
 293         goto fail_io;
 294     bi = av_malloc(bisize);
 295     if(!bi) {
 296         vfw_read_close(s);
 297         return AVERROR(ENOMEM);
 298     }
 299     ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi);
 300     if(!ret)
 301         goto fail_bi;
 302
 303     dump_bih(s, &bi->bmiHeader);
 304
 305     width  = ap->width  ? ap->width  : bi->bmiHeader.biWidth ;
 306     height = ap->height ? ap->height : bi->bmiHeader.biHeight;
 307     bi->bmiHeader.biWidth  = width ;
 308     bi->bmiHeader.biHeight = height;
 309
 310     if (0) {
 311         /* For testing yet unsupported compressions
 312          * Copy these values from user-supplied verbose information */
 313         bi->bmiHeader.biWidth       = 320;
 314         bi->bmiHeader.biHeight      = 240;
 315         bi->bmiHeader.biPlanes      = 1;
 316         bi->bmiHeader.biBitCount    = 12;
 317         bi->bmiHeader.biCompression = MKTAG('I','4','2','0');
 318         bi->bmiHeader.biSizeImage   = 115200;
 319         dump_bih(s, &bi->bmiHeader);
 320     }
 321
 322     ret = SendMessage(ctx->hwnd, WM_CAP_SET_VIDEOFORMAT, bisize, (LPARAM) bi);
 323     if(!ret) {
 324         av_log(s, AV_LOG_ERROR, "Could not set Video Format.\n");
 325         goto fail_bi;
 326     }
 327
 328     biCompression = bi->bmiHeader.biCompression;
 329     biBitCount = bi->bmiHeader.biBitCount;
 330
 331     av_free(bi);
 332
 333     /* Set sequence setup */
 334     ret = SendMessage(ctx->hwnd, WM_CAP_GET_SEQUENCE_SETUP, sizeof(cparms),
 335                       (LPARAM) &cparms);
 336     if(!ret)
 337         goto fail_io;
 338
 339     dump_captureparms(s, &cparms);
 340
 341     cparms.fYield = 1; // Spawn a background thread
 342     cparms.dwRequestMicroSecPerFrame =
 343                                (ap->time_base.num*1000000) / ap->time_base.den;
 344     cparms.fAbortLeftMouse = 0;
 345     cparms.fAbortRightMouse = 0;
 346     cparms.fCaptureAudio = 0;
 347     cparms.vKeyAbort = 0;
 348
 349     ret = SendMessage(ctx->hwnd, WM_CAP_SET_SEQUENCE_SETUP, sizeof(cparms),
 350                       (LPARAM) &cparms);
 351     if(!ret)
 352         goto fail_io;
 353
 354     codec = st->codec;
 355     codec->time_base = ap->time_base;
 356     codec->codec_type = AVMEDIA_TYPE_VIDEO;
 357     codec->width = width;
 358     codec->height = height;
 359     codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount);
 360     if(codec->pix_fmt == PIX_FMT_NONE) {
 361         codec->codec_id = vfw_codecid(biCompression);
 362         if(codec->codec_id == CODEC_ID_NONE) {
 363             av_log(s, AV_LOG_ERROR, "Unknown compression type. "
 364                              "Please report verbose (-v 9) debug information.\n");
 365             vfw_read_close(s);
 366             return AVERROR_PATCHWELCOME;
 367         }
 368         codec->bits_per_coded_sample = biBitCount;
 369     } else {
 370         codec->codec_id = CODEC_ID_RAWVIDEO;
 371         if(biCompression == BI_RGB) {
 372             codec->bits_per_coded_sample = biBitCount;
 373             codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE);
 374             if (codec->extradata) {
 375                 codec->extradata_size = 9;
 376                 memcpy(codec->extradata, "BottomUp", 9);
 377             }
 378         }
 379     }
 380
 381     av_set_pts_info(st, 32, 1, 1000);
 382
 383     ctx->mutex = CreateMutex(NULL, 0, NULL);
 384     if(!ctx->mutex) {
 385         av_log(s, AV_LOG_ERROR, "Could not create Mutex.\n" );
 386         goto fail_io;
 387     }
 388     ctx->event = CreateEvent(NULL, 1, 0, NULL);
 389     if(!ctx->event) {
 390         av_log(s, AV_LOG_ERROR, "Could not create Event.\n" );
 391         goto fail_io;
 392     }
 393
 394     ret = SendMessage(ctx->hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0);
 395     if(!ret) {
 396         av_log(s, AV_LOG_ERROR, "Could not start capture sequence.\n" );
 397         goto fail_io;
 398     }
 399
 400     return 0;
 401
 402 fail_bi:
 403     av_free(bi);
 404
 405 fail_io:
 406     vfw_read_close(s);
 407     return AVERROR(EIO);
 408 }
 409
 410 static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt)
 411 {
 412     struct vfw_ctx *ctx = s->priv_data;
 413     AVPacketList *pktl = NULL;
 414
 415     while(!pktl) {
 416         WaitForSingleObject(ctx->mutex, INFINITE);
 417         pktl = ctx->pktl;
 418         if(ctx->pktl) {
 419             *pkt = ctx->pktl->pkt;
 420             ctx->pktl = ctx->pktl->next;
 421             av_free(pktl);
 422         }
 423         ResetEvent(ctx->event);
 424         ReleaseMutex(ctx->mutex);
 425         if(!pktl) {
 426             if(s->flags & AVFMT_FLAG_NONBLOCK) {
 427                 return AVERROR(EAGAIN);
 428             } else {
 429                 WaitForSingleObject(ctx->event, INFINITE);
 430             }
 431         }
 432     }
 433
 434     ctx->curbufsize -= pkt->size;
 435
 436     return pkt->size;
 437 }
 438
 439 AVInputFormat vfwcap_demuxer = {
 440     "vfwcap",
 441     NULL_IF_CONFIG_SMALL("VFW video capture"),
 442     sizeof(struct vfw_ctx),
 443     NULL,
 444     vfw_read_header,
 445     vfw_read_packet,
 446     vfw_read_close,
 447     .flags = AVFMT_NOFILE,
 448 };