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