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00022 #include "libavutil/log.h"
00023 #include "libavutil/opt.h"
00024 #include "libavutil/parseutils.h"
00025 #include <windows.h>
00026 #include <vfw.h>
00027 #include "avdevice.h"
00028
00029
00030
00031 #define HWND_MESSAGE ((HWND)-3)
00032
00033
00034
00035 struct vfw_ctx {
00036 const AVClass *class;
00037 HWND hwnd;
00038 HANDLE mutex;
00039 HANDLE event;
00040 AVPacketList *pktl;
00041 unsigned int curbufsize;
00042 unsigned int frame_num;
00043 char *video_size;
00044 char *framerate;
00045 };
00046
00047 static enum PixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount)
00048 {
00049 switch(biCompression) {
00050 case MKTAG('U', 'Y', 'V', 'Y'):
00051 return PIX_FMT_UYVY422;
00052 case MKTAG('Y', 'U', 'Y', '2'):
00053 return PIX_FMT_YUYV422;
00054 case MKTAG('I', '4', '2', '0'):
00055 return PIX_FMT_YUV420P;
00056 case BI_RGB:
00057 switch(biBitCount) {
00058 case 1:
00059 return PIX_FMT_MONOWHITE;
00060 case 4:
00061 return PIX_FMT_RGB4;
00062 case 8:
00063 return PIX_FMT_RGB8;
00064 case 16:
00065 return PIX_FMT_RGB555;
00066 case 24:
00067 return PIX_FMT_BGR24;
00068 case 32:
00069 return PIX_FMT_RGB32;
00070 }
00071 }
00072 return PIX_FMT_NONE;
00073 }
00074
00075 static enum CodecID vfw_codecid(DWORD biCompression)
00076 {
00077 switch(biCompression) {
00078 case MKTAG('d', 'v', 's', 'd'):
00079 return CODEC_ID_DVVIDEO;
00080 case MKTAG('M', 'J', 'P', 'G'):
00081 case MKTAG('m', 'j', 'p', 'g'):
00082 return CODEC_ID_MJPEG;
00083 }
00084 return CODEC_ID_NONE;
00085 }
00086
00087 #define dstruct(pctx, sname, var, type) \
00088 av_log(pctx, AV_LOG_DEBUG, #var":\t%"type"\n", sname->var)
00089
00090 static void dump_captureparms(AVFormatContext *s, CAPTUREPARMS *cparms)
00091 {
00092 av_log(s, AV_LOG_DEBUG, "CAPTUREPARMS\n");
00093 dstruct(s, cparms, dwRequestMicroSecPerFrame, "lu");
00094 dstruct(s, cparms, fMakeUserHitOKToCapture, "d");
00095 dstruct(s, cparms, wPercentDropForError, "u");
00096 dstruct(s, cparms, fYield, "d");
00097 dstruct(s, cparms, dwIndexSize, "lu");
00098 dstruct(s, cparms, wChunkGranularity, "u");
00099 dstruct(s, cparms, fUsingDOSMemory, "d");
00100 dstruct(s, cparms, wNumVideoRequested, "u");
00101 dstruct(s, cparms, fCaptureAudio, "d");
00102 dstruct(s, cparms, wNumAudioRequested, "u");
00103 dstruct(s, cparms, vKeyAbort, "u");
00104 dstruct(s, cparms, fAbortLeftMouse, "d");
00105 dstruct(s, cparms, fAbortRightMouse, "d");
00106 dstruct(s, cparms, fLimitEnabled, "d");
00107 dstruct(s, cparms, wTimeLimit, "u");
00108 dstruct(s, cparms, fMCIControl, "d");
00109 dstruct(s, cparms, fStepMCIDevice, "d");
00110 dstruct(s, cparms, dwMCIStartTime, "lu");
00111 dstruct(s, cparms, dwMCIStopTime, "lu");
00112 dstruct(s, cparms, fStepCaptureAt2x, "d");
00113 dstruct(s, cparms, wStepCaptureAverageFrames, "u");
00114 dstruct(s, cparms, dwAudioBufferSize, "lu");
00115 dstruct(s, cparms, fDisableWriteCache, "d");
00116 dstruct(s, cparms, AVStreamMaster, "u");
00117 }
00118
00119 static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr)
00120 {
00121 #ifdef DEBUG
00122 av_log(s, AV_LOG_DEBUG, "VIDEOHDR\n");
00123 dstruct(s, vhdr, lpData, "p");
00124 dstruct(s, vhdr, dwBufferLength, "lu");
00125 dstruct(s, vhdr, dwBytesUsed, "lu");
00126 dstruct(s, vhdr, dwTimeCaptured, "lu");
00127 dstruct(s, vhdr, dwUser, "lu");
00128 dstruct(s, vhdr, dwFlags, "lu");
00129 dstruct(s, vhdr, dwReserved[0], "lu");
00130 dstruct(s, vhdr, dwReserved[1], "lu");
00131 dstruct(s, vhdr, dwReserved[2], "lu");
00132 dstruct(s, vhdr, dwReserved[3], "lu");
00133 #endif
00134 }
00135
00136 static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih)
00137 {
00138 av_log(s, AV_LOG_DEBUG, "BITMAPINFOHEADER\n");
00139 dstruct(s, bih, biSize, "lu");
00140 dstruct(s, bih, biWidth, "ld");
00141 dstruct(s, bih, biHeight, "ld");
00142 dstruct(s, bih, biPlanes, "d");
00143 dstruct(s, bih, biBitCount, "d");
00144 dstruct(s, bih, biCompression, "lu");
00145 av_log(s, AV_LOG_DEBUG, " biCompression:\t\"%.4s\"\n",
00146 (char*) &bih->biCompression);
00147 dstruct(s, bih, biSizeImage, "lu");
00148 dstruct(s, bih, biXPelsPerMeter, "lu");
00149 dstruct(s, bih, biYPelsPerMeter, "lu");
00150 dstruct(s, bih, biClrUsed, "lu");
00151 dstruct(s, bih, biClrImportant, "lu");
00152 }
00153
00154 static int shall_we_drop(AVFormatContext *s)
00155 {
00156 struct vfw_ctx *ctx = s->priv_data;
00157 const uint8_t dropscore[] = {62, 75, 87, 100};
00158 const int ndropscores = FF_ARRAY_ELEMS(dropscore);
00159 unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer;
00160
00161 if(dropscore[++ctx->frame_num%ndropscores] <= buffer_fullness) {
00162 av_log(s, AV_LOG_ERROR,
00163 "real-time buffer %d%% full! frame dropped!\n", buffer_fullness);
00164 return 1;
00165 }
00166
00167 return 0;
00168 }
00169
00170 static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr)
00171 {
00172 AVFormatContext *s;
00173 struct vfw_ctx *ctx;
00174 AVPacketList **ppktl, *pktl_next;
00175
00176 s = (AVFormatContext *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
00177 ctx = s->priv_data;
00178
00179 dump_videohdr(s, vdhdr);
00180
00181 if(shall_we_drop(s))
00182 return FALSE;
00183
00184 WaitForSingleObject(ctx->mutex, INFINITE);
00185
00186 pktl_next = av_mallocz(sizeof(AVPacketList));
00187 if(!pktl_next)
00188 goto fail;
00189
00190 if(av_new_packet(&pktl_next->pkt, vdhdr->dwBytesUsed) < 0) {
00191 av_free(pktl_next);
00192 goto fail;
00193 }
00194
00195 pktl_next->pkt.pts = vdhdr->dwTimeCaptured;
00196 memcpy(pktl_next->pkt.data, vdhdr->lpData, vdhdr->dwBytesUsed);
00197
00198 for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next);
00199 *ppktl = pktl_next;
00200
00201 ctx->curbufsize += vdhdr->dwBytesUsed;
00202
00203 SetEvent(ctx->event);
00204 ReleaseMutex(ctx->mutex);
00205
00206 return TRUE;
00207 fail:
00208 ReleaseMutex(ctx->mutex);
00209 return FALSE;
00210 }
00211
00212 static int vfw_read_close(AVFormatContext *s)
00213 {
00214 struct vfw_ctx *ctx = s->priv_data;
00215 AVPacketList *pktl;
00216
00217 if(ctx->hwnd) {
00218 SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
00219 SendMessage(ctx->hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0);
00220 DestroyWindow(ctx->hwnd);
00221 }
00222 if(ctx->mutex)
00223 CloseHandle(ctx->mutex);
00224 if(ctx->event)
00225 CloseHandle(ctx->event);
00226
00227 pktl = ctx->pktl;
00228 while (pktl) {
00229 AVPacketList *next = pktl->next;
00230 av_destruct_packet(&pktl->pkt);
00231 av_free(pktl);
00232 pktl = next;
00233 }
00234
00235 return 0;
00236 }
00237
00238 static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap)
00239 {
00240 struct vfw_ctx *ctx = s->priv_data;
00241 AVCodecContext *codec;
00242 AVStream *st;
00243 int devnum;
00244 int bisize;
00245 BITMAPINFO *bi = NULL;
00246 CAPTUREPARMS cparms;
00247 DWORD biCompression;
00248 WORD biBitCount;
00249 int ret;
00250 AVRational fps;
00251
00252 if (!strcmp(s->filename, "list")) {
00253 for (devnum = 0; devnum <= 9; devnum++) {
00254 char driver_name[256];
00255 char driver_ver[256];
00256 ret = capGetDriverDescription(devnum,
00257 driver_name, sizeof(driver_name),
00258 driver_ver, sizeof(driver_ver));
00259 if (ret) {
00260 av_log(s, AV_LOG_INFO, "Driver %d\n", devnum);
00261 av_log(s, AV_LOG_INFO, " %s\n", driver_name);
00262 av_log(s, AV_LOG_INFO, " %s\n", driver_ver);
00263 }
00264 }
00265 return AVERROR(EIO);
00266 }
00267
00268 #if FF_API_FORMAT_PARAMETERS
00269 if (ap->time_base.num)
00270 fps = (AVRational){ap->time_base.den, ap->time_base.num};
00271 #endif
00272
00273 ctx->hwnd = capCreateCaptureWindow(NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, 0);
00274 if(!ctx->hwnd) {
00275 av_log(s, AV_LOG_ERROR, "Could not create capture window.\n");
00276 return AVERROR(EIO);
00277 }
00278
00279
00280 devnum = atoi(s->filename);
00281
00282 ret = SendMessage(ctx->hwnd, WM_CAP_DRIVER_CONNECT, devnum, 0);
00283 if(!ret) {
00284 av_log(s, AV_LOG_ERROR, "Could not connect to device.\n");
00285 DestroyWindow(ctx->hwnd);
00286 return AVERROR(ENODEV);
00287 }
00288
00289 SendMessage(ctx->hwnd, WM_CAP_SET_OVERLAY, 0, 0);
00290 SendMessage(ctx->hwnd, WM_CAP_SET_PREVIEW, 0, 0);
00291
00292 ret = SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0,
00293 (LPARAM) videostream_cb);
00294 if(!ret) {
00295 av_log(s, AV_LOG_ERROR, "Could not set video stream callback.\n");
00296 goto fail;
00297 }
00298
00299 SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) s);
00300
00301 st = av_new_stream(s, 0);
00302 if(!st) {
00303 vfw_read_close(s);
00304 return AVERROR(ENOMEM);
00305 }
00306
00307
00308 bisize = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0);
00309 if(!bisize)
00310 goto fail;
00311 bi = av_malloc(bisize);
00312 if(!bi) {
00313 vfw_read_close(s);
00314 return AVERROR(ENOMEM);
00315 }
00316 ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi);
00317 if(!ret)
00318 goto fail;
00319
00320 dump_bih(s, &bi->bmiHeader);
00321
00322
00323 if (ctx->video_size) {
00324 ret = av_parse_video_size(&bi->bmiHeader.biWidth, &bi->bmiHeader.biHeight, ctx->video_size);
00325 if (ret < 0) {
00326 av_log(s, AV_LOG_ERROR, "Couldn't parse video size.\n");
00327 goto fail;
00328 }
00329 }
00330 #if FF_API_FORMAT_PARAMETERS
00331 if (ap->width > 0)
00332 bi->bmiHeader.biWidth = ap->width;
00333 if (ap->height > 0)
00334 bi->bmiHeader.biHeight = ap->height;
00335 #endif
00336
00337 if (0) {
00338
00339
00340 bi->bmiHeader.biWidth = 320;
00341 bi->bmiHeader.biHeight = 240;
00342 bi->bmiHeader.biPlanes = 1;
00343 bi->bmiHeader.biBitCount = 12;
00344 bi->bmiHeader.biCompression = MKTAG('I','4','2','0');
00345 bi->bmiHeader.biSizeImage = 115200;
00346 dump_bih(s, &bi->bmiHeader);
00347 }
00348
00349 ret = SendMessage(ctx->hwnd, WM_CAP_SET_VIDEOFORMAT, bisize, (LPARAM) bi);
00350 if(!ret) {
00351 av_log(s, AV_LOG_ERROR, "Could not set Video Format.\n");
00352 goto fail;
00353 }
00354
00355 biCompression = bi->bmiHeader.biCompression;
00356 biBitCount = bi->bmiHeader.biBitCount;
00357
00358
00359 ret = SendMessage(ctx->hwnd, WM_CAP_GET_SEQUENCE_SETUP, sizeof(cparms),
00360 (LPARAM) &cparms);
00361 if(!ret)
00362 goto fail;
00363
00364 dump_captureparms(s, &cparms);
00365
00366 cparms.fYield = 1;
00367 cparms.dwRequestMicroSecPerFrame =
00368 (fps.den*1000000) / fps.num;
00369 cparms.fAbortLeftMouse = 0;
00370 cparms.fAbortRightMouse = 0;
00371 cparms.fCaptureAudio = 0;
00372 cparms.vKeyAbort = 0;
00373
00374 ret = SendMessage(ctx->hwnd, WM_CAP_SET_SEQUENCE_SETUP, sizeof(cparms),
00375 (LPARAM) &cparms);
00376 if(!ret)
00377 goto fail;
00378
00379 codec = st->codec;
00380 codec->time_base = (AVRational){fps.den, fps.num};
00381 codec->codec_type = AVMEDIA_TYPE_VIDEO;
00382 codec->width = bi->bmiHeader.biWidth;
00383 codec->height = bi->bmiHeader.biHeight;
00384 codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount);
00385 if(codec->pix_fmt == PIX_FMT_NONE) {
00386 codec->codec_id = vfw_codecid(biCompression);
00387 if(codec->codec_id == CODEC_ID_NONE) {
00388 av_log(s, AV_LOG_ERROR, "Unknown compression type. "
00389 "Please report verbose (-v 9) debug information.\n");
00390 vfw_read_close(s);
00391 return AVERROR_PATCHWELCOME;
00392 }
00393 codec->bits_per_coded_sample = biBitCount;
00394 } else {
00395 codec->codec_id = CODEC_ID_RAWVIDEO;
00396 if(biCompression == BI_RGB) {
00397 codec->bits_per_coded_sample = biBitCount;
00398 codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE);
00399 if (codec->extradata) {
00400 codec->extradata_size = 9;
00401 memcpy(codec->extradata, "BottomUp", 9);
00402 }
00403 }
00404 }
00405
00406 av_freep(&bi);
00407
00408 av_set_pts_info(st, 32, 1, 1000);
00409
00410 ctx->mutex = CreateMutex(NULL, 0, NULL);
00411 if(!ctx->mutex) {
00412 av_log(s, AV_LOG_ERROR, "Could not create Mutex.\n" );
00413 goto fail;
00414 }
00415 ctx->event = CreateEvent(NULL, 1, 0, NULL);
00416 if(!ctx->event) {
00417 av_log(s, AV_LOG_ERROR, "Could not create Event.\n" );
00418 goto fail;
00419 }
00420
00421 ret = SendMessage(ctx->hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0);
00422 if(!ret) {
00423 av_log(s, AV_LOG_ERROR, "Could not start capture sequence.\n" );
00424 goto fail;
00425 }
00426
00427 return 0;
00428
00429 fail:
00430 av_freep(&bi);
00431 vfw_read_close(s);
00432 return AVERROR(EIO);
00433 }
00434
00435 static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt)
00436 {
00437 struct vfw_ctx *ctx = s->priv_data;
00438 AVPacketList *pktl = NULL;
00439
00440 while(!pktl) {
00441 WaitForSingleObject(ctx->mutex, INFINITE);
00442 pktl = ctx->pktl;
00443 if(ctx->pktl) {
00444 *pkt = ctx->pktl->pkt;
00445 ctx->pktl = ctx->pktl->next;
00446 av_free(pktl);
00447 }
00448 ResetEvent(ctx->event);
00449 ReleaseMutex(ctx->mutex);
00450 if(!pktl) {
00451 if(s->flags & AVFMT_FLAG_NONBLOCK) {
00452 return AVERROR(EAGAIN);
00453 } else {
00454 WaitForSingleObject(ctx->event, INFINITE);
00455 }
00456 }
00457 }
00458
00459 ctx->curbufsize -= pkt->size;
00460
00461 return pkt->size;
00462 }
00463
00464 #define OFFSET(x) offsetof(struct vfw_ctx, x)
00465 #define DEC AV_OPT_FLAG_DECODING_PARAM
00466 static const AVOption options[] = {
00467 { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
00468 { "framerate", "", OFFSET(framerate), FF_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC },
00469 { NULL },
00470 };
00471
00472 static const AVClass vfw_class = {
00473 .class_name = "VFW indev",
00474 .item_name = av_default_item_name,
00475 .option = options,
00476 .version = LIBAVUTIL_VERSION_INT,
00477 };
00478
00479 AVInputFormat ff_vfwcap_demuxer = {
00480 "vfwcap",
00481 NULL_IF_CONFIG_SMALL("VFW video capture"),
00482 sizeof(struct vfw_ctx),
00483 NULL,
00484 vfw_read_header,
00485 vfw_read_packet,
00486 vfw_read_close,
00487 .flags = AVFMT_NOFILE,
00488 .priv_class = &vfw_class,
00489 };
