| 1 | /* |
| 2 | * Directshow capture interface |
| 3 | * Copyright (c) 2010 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 "dshow_capture.h" |
| 23 | #include "libavutil/parseutils.h" |
| 24 | #include "libavutil/pixdesc.h" |
| 25 | #include "libavutil/opt.h" |
| 26 | #include "libavformat/internal.h" |
| 27 | #include "libavformat/riff.h" |
| 28 | #include "avdevice.h" |
| 29 | #include "libavcodec/raw.h" |
| 30 | |
| 31 | struct dshow_ctx { |
| 32 | const AVClass *class; |
| 33 | |
| 34 | IGraphBuilder *graph; |
| 35 | |
| 36 | char *device_name[2]; |
| 37 | int video_device_number; |
| 38 | int audio_device_number; |
| 39 | |
| 40 | int list_options; |
| 41 | int list_devices; |
| 42 | int audio_buffer_size; |
| 43 | |
| 44 | IBaseFilter *device_filter[2]; |
| 45 | IPin *device_pin[2]; |
| 46 | libAVFilter *capture_filter[2]; |
| 47 | libAVPin *capture_pin[2]; |
| 48 | |
| 49 | HANDLE mutex; |
| 50 | HANDLE event[2]; /* event[0] is set by DirectShow |
| 51 | * event[1] is set by callback() */ |
| 52 | AVPacketList *pktl; |
| 53 | |
| 54 | int eof; |
| 55 | |
| 56 | int64_t curbufsize[2]; |
| 57 | unsigned int video_frame_num; |
| 58 | |
| 59 | IMediaControl *control; |
| 60 | IMediaEvent *media_event; |
| 61 | |
| 62 | enum AVPixelFormat pixel_format; |
| 63 | enum AVCodecID video_codec_id; |
| 64 | char *framerate; |
| 65 | |
| 66 | int requested_width; |
| 67 | int requested_height; |
| 68 | AVRational requested_framerate; |
| 69 | |
| 70 | int sample_rate; |
| 71 | int sample_size; |
| 72 | int channels; |
| 73 | }; |
| 74 | |
| 75 | static enum AVPixelFormat dshow_pixfmt(DWORD biCompression, WORD biBitCount) |
| 76 | { |
| 77 | switch(biCompression) { |
| 78 | case BI_BITFIELDS: |
| 79 | case BI_RGB: |
| 80 | switch(biBitCount) { /* 1-8 are untested */ |
| 81 | case 1: |
| 82 | return AV_PIX_FMT_MONOWHITE; |
| 83 | case 4: |
| 84 | return AV_PIX_FMT_RGB4; |
| 85 | case 8: |
| 86 | return AV_PIX_FMT_RGB8; |
| 87 | case 16: |
| 88 | return AV_PIX_FMT_RGB555; |
| 89 | case 24: |
| 90 | return AV_PIX_FMT_BGR24; |
| 91 | case 32: |
| 92 | return AV_PIX_FMT_0RGB32; |
| 93 | } |
| 94 | } |
| 95 | return avpriv_find_pix_fmt(avpriv_get_raw_pix_fmt_tags(), biCompression); // all others |
| 96 | } |
| 97 | |
| 98 | static int |
| 99 | dshow_read_close(AVFormatContext *s) |
| 100 | { |
| 101 | struct dshow_ctx *ctx = s->priv_data; |
| 102 | AVPacketList *pktl; |
| 103 | |
| 104 | if (ctx->control) { |
| 105 | IMediaControl_Stop(ctx->control); |
| 106 | IMediaControl_Release(ctx->control); |
| 107 | } |
| 108 | |
| 109 | if (ctx->media_event) |
| 110 | IMediaEvent_Release(ctx->media_event); |
| 111 | |
| 112 | if (ctx->graph) { |
| 113 | IEnumFilters *fenum; |
| 114 | int r; |
| 115 | r = IGraphBuilder_EnumFilters(ctx->graph, &fenum); |
| 116 | if (r == S_OK) { |
| 117 | IBaseFilter *f; |
| 118 | IEnumFilters_Reset(fenum); |
| 119 | while (IEnumFilters_Next(fenum, 1, &f, NULL) == S_OK) { |
| 120 | if (IGraphBuilder_RemoveFilter(ctx->graph, f) == S_OK) |
| 121 | IEnumFilters_Reset(fenum); /* When a filter is removed, |
| 122 | * the list must be reset. */ |
| 123 | IBaseFilter_Release(f); |
| 124 | } |
| 125 | IEnumFilters_Release(fenum); |
| 126 | } |
| 127 | IGraphBuilder_Release(ctx->graph); |
| 128 | } |
| 129 | |
| 130 | if (ctx->capture_pin[VideoDevice]) |
| 131 | libAVPin_Release(ctx->capture_pin[VideoDevice]); |
| 132 | if (ctx->capture_pin[AudioDevice]) |
| 133 | libAVPin_Release(ctx->capture_pin[AudioDevice]); |
| 134 | if (ctx->capture_filter[VideoDevice]) |
| 135 | libAVFilter_Release(ctx->capture_filter[VideoDevice]); |
| 136 | if (ctx->capture_filter[AudioDevice]) |
| 137 | libAVFilter_Release(ctx->capture_filter[AudioDevice]); |
| 138 | |
| 139 | if (ctx->device_pin[VideoDevice]) |
| 140 | IPin_Release(ctx->device_pin[VideoDevice]); |
| 141 | if (ctx->device_pin[AudioDevice]) |
| 142 | IPin_Release(ctx->device_pin[AudioDevice]); |
| 143 | if (ctx->device_filter[VideoDevice]) |
| 144 | IBaseFilter_Release(ctx->device_filter[VideoDevice]); |
| 145 | if (ctx->device_filter[AudioDevice]) |
| 146 | IBaseFilter_Release(ctx->device_filter[AudioDevice]); |
| 147 | |
| 148 | if (ctx->device_name[0]) |
| 149 | av_free(ctx->device_name[0]); |
| 150 | if (ctx->device_name[1]) |
| 151 | av_free(ctx->device_name[1]); |
| 152 | |
| 153 | if(ctx->mutex) |
| 154 | CloseHandle(ctx->mutex); |
| 155 | if(ctx->event[0]) |
| 156 | CloseHandle(ctx->event[0]); |
| 157 | if(ctx->event[1]) |
| 158 | CloseHandle(ctx->event[1]); |
| 159 | |
| 160 | pktl = ctx->pktl; |
| 161 | while (pktl) { |
| 162 | AVPacketList *next = pktl->next; |
| 163 | av_destruct_packet(&pktl->pkt); |
| 164 | av_free(pktl); |
| 165 | pktl = next; |
| 166 | } |
| 167 | |
| 168 | CoUninitialize(); |
| 169 | |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | static char *dup_wchar_to_utf8(wchar_t *w) |
| 174 | { |
| 175 | char *s = NULL; |
| 176 | int l = WideCharToMultiByte(CP_UTF8, 0, w, -1, 0, 0, 0, 0); |
| 177 | s = av_malloc(l); |
| 178 | if (s) |
| 179 | WideCharToMultiByte(CP_UTF8, 0, w, -1, s, l, 0, 0); |
| 180 | return s; |
| 181 | } |
| 182 | |
| 183 | static int shall_we_drop(AVFormatContext *s, int index, enum dshowDeviceType devtype) |
| 184 | { |
| 185 | struct dshow_ctx *ctx = s->priv_data; |
| 186 | static const uint8_t dropscore[] = {62, 75, 87, 100}; |
| 187 | const int ndropscores = FF_ARRAY_ELEMS(dropscore); |
| 188 | unsigned int buffer_fullness = (ctx->curbufsize[index]*100)/s->max_picture_buffer; |
| 189 | |
| 190 | if(dropscore[++ctx->video_frame_num%ndropscores] <= buffer_fullness) { |
| 191 | av_log(s, AV_LOG_ERROR, |
| 192 | "real-time buffer[%s] too full (%d%% of size: %d)! frame dropped!\n", ctx->device_name[devtype], buffer_fullness, s->max_picture_buffer); |
| 193 | return 1; |
| 194 | } |
| 195 | |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | static void |
| 200 | callback(void *priv_data, int index, uint8_t *buf, int buf_size, int64_t time, enum dshowDeviceType devtype) |
| 201 | { |
| 202 | AVFormatContext *s = priv_data; |
| 203 | struct dshow_ctx *ctx = s->priv_data; |
| 204 | AVPacketList **ppktl, *pktl_next; |
| 205 | |
| 206 | // dump_videohdr(s, vdhdr); |
| 207 | |
| 208 | WaitForSingleObject(ctx->mutex, INFINITE); |
| 209 | |
| 210 | if(shall_we_drop(s, index, devtype)) |
| 211 | goto fail; |
| 212 | |
| 213 | pktl_next = av_mallocz(sizeof(AVPacketList)); |
| 214 | if(!pktl_next) |
| 215 | goto fail; |
| 216 | |
| 217 | if(av_new_packet(&pktl_next->pkt, buf_size) < 0) { |
| 218 | av_free(pktl_next); |
| 219 | goto fail; |
| 220 | } |
| 221 | |
| 222 | pktl_next->pkt.stream_index = index; |
| 223 | pktl_next->pkt.pts = time; |
| 224 | memcpy(pktl_next->pkt.data, buf, buf_size); |
| 225 | |
| 226 | for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next); |
| 227 | *ppktl = pktl_next; |
| 228 | ctx->curbufsize[index] += buf_size; |
| 229 | |
| 230 | SetEvent(ctx->event[1]); |
| 231 | ReleaseMutex(ctx->mutex); |
| 232 | |
| 233 | return; |
| 234 | fail: |
| 235 | ReleaseMutex(ctx->mutex); |
| 236 | return; |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * Cycle through available devices using the device enumerator devenum, |
| 241 | * retrieve the device with type specified by devtype and return the |
| 242 | * pointer to the object found in *pfilter. |
| 243 | * If pfilter is NULL, list all device names. |
| 244 | */ |
| 245 | static int |
| 246 | dshow_cycle_devices(AVFormatContext *avctx, ICreateDevEnum *devenum, |
| 247 | enum dshowDeviceType devtype, IBaseFilter **pfilter) |
| 248 | { |
| 249 | struct dshow_ctx *ctx = avctx->priv_data; |
| 250 | IBaseFilter *device_filter = NULL; |
| 251 | IEnumMoniker *classenum = NULL; |
| 252 | IMoniker *m = NULL; |
| 253 | const char *device_name = ctx->device_name[devtype]; |
| 254 | int skip = (devtype == VideoDevice) ? ctx->video_device_number |
| 255 | : ctx->audio_device_number; |
| 256 | int r; |
| 257 | |
| 258 | const GUID *device_guid[2] = { &CLSID_VideoInputDeviceCategory, |
| 259 | &CLSID_AudioInputDeviceCategory }; |
| 260 | const char *devtypename = (devtype == VideoDevice) ? "video" : "audio"; |
| 261 | |
| 262 | r = ICreateDevEnum_CreateClassEnumerator(devenum, device_guid[devtype], |
| 263 | (IEnumMoniker **) &classenum, 0); |
| 264 | if (r != S_OK) { |
| 265 | av_log(avctx, AV_LOG_ERROR, "Could not enumerate %s devices.\n", |
| 266 | devtypename); |
| 267 | return AVERROR(EIO); |
| 268 | } |
| 269 | |
| 270 | while (!device_filter && IEnumMoniker_Next(classenum, 1, &m, NULL) == S_OK) { |
| 271 | IPropertyBag *bag = NULL; |
| 272 | char *buf = NULL; |
| 273 | VARIANT var; |
| 274 | |
| 275 | r = IMoniker_BindToStorage(m, 0, 0, &IID_IPropertyBag, (void *) &bag); |
| 276 | if (r != S_OK) |
| 277 | goto fail1; |
| 278 | |
| 279 | var.vt = VT_BSTR; |
| 280 | r = IPropertyBag_Read(bag, L"FriendlyName", &var, NULL); |
| 281 | if (r != S_OK) |
| 282 | goto fail1; |
| 283 | |
| 284 | buf = dup_wchar_to_utf8(var.bstrVal); |
| 285 | |
| 286 | if (pfilter) { |
| 287 | if (strcmp(device_name, buf)) |
| 288 | goto fail1; |
| 289 | |
| 290 | if (!skip--) |
| 291 | IMoniker_BindToObject(m, 0, 0, &IID_IBaseFilter, (void *) &device_filter); |
| 292 | } else { |
| 293 | av_log(avctx, AV_LOG_INFO, " \"%s\"\n", buf); |
| 294 | } |
| 295 | |
| 296 | fail1: |
| 297 | if (buf) |
| 298 | av_free(buf); |
| 299 | if (bag) |
| 300 | IPropertyBag_Release(bag); |
| 301 | IMoniker_Release(m); |
| 302 | } |
| 303 | |
| 304 | IEnumMoniker_Release(classenum); |
| 305 | |
| 306 | if (pfilter) { |
| 307 | if (!device_filter) { |
| 308 | av_log(avctx, AV_LOG_ERROR, "Could not find %s device.\n", |
| 309 | devtypename); |
| 310 | return AVERROR(EIO); |
| 311 | } |
| 312 | *pfilter = device_filter; |
| 313 | } |
| 314 | |
| 315 | return 0; |
| 316 | } |
| 317 | |
| 318 | /** |
| 319 | * Cycle through available formats using the specified pin, |
| 320 | * try to set parameters specified through AVOptions and if successful |
| 321 | * return 1 in *pformat_set. |
| 322 | * If pformat_set is NULL, list all pin capabilities. |
| 323 | */ |
| 324 | static void |
| 325 | dshow_cycle_formats(AVFormatContext *avctx, enum dshowDeviceType devtype, |
| 326 | IPin *pin, int *pformat_set) |
| 327 | { |
| 328 | struct dshow_ctx *ctx = avctx->priv_data; |
| 329 | IAMStreamConfig *config = NULL; |
| 330 | AM_MEDIA_TYPE *type = NULL; |
| 331 | int format_set = 0; |
| 332 | void *caps = NULL; |
| 333 | int i, n, size; |
| 334 | |
| 335 | if (IPin_QueryInterface(pin, &IID_IAMStreamConfig, (void **) &config) != S_OK) |
| 336 | return; |
| 337 | if (IAMStreamConfig_GetNumberOfCapabilities(config, &n, &size) != S_OK) |
| 338 | goto end; |
| 339 | |
| 340 | caps = av_malloc(size); |
| 341 | if (!caps) |
| 342 | goto end; |
| 343 | |
| 344 | for (i = 0; i < n && !format_set; i++) { |
| 345 | IAMStreamConfig_GetStreamCaps(config, i, &type, (void *) caps); |
| 346 | |
| 347 | #if DSHOWDEBUG |
| 348 | ff_print_AM_MEDIA_TYPE(type); |
| 349 | #endif |
| 350 | |
| 351 | if (devtype == VideoDevice) { |
| 352 | VIDEO_STREAM_CONFIG_CAPS *vcaps = caps; |
| 353 | BITMAPINFOHEADER *bih; |
| 354 | int64_t *fr; |
| 355 | const AVCodecTag *const tags[] = { avformat_get_riff_video_tags(), NULL }; |
| 356 | #if DSHOWDEBUG |
| 357 | ff_print_VIDEO_STREAM_CONFIG_CAPS(vcaps); |
| 358 | #endif |
| 359 | if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo)) { |
| 360 | VIDEOINFOHEADER *v = (void *) type->pbFormat; |
| 361 | fr = &v->AvgTimePerFrame; |
| 362 | bih = &v->bmiHeader; |
| 363 | } else if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo2)) { |
| 364 | VIDEOINFOHEADER2 *v = (void *) type->pbFormat; |
| 365 | fr = &v->AvgTimePerFrame; |
| 366 | bih = &v->bmiHeader; |
| 367 | } else { |
| 368 | goto next; |
| 369 | } |
| 370 | if (!pformat_set) { |
| 371 | enum AVPixelFormat pix_fmt = dshow_pixfmt(bih->biCompression, bih->biBitCount); |
| 372 | if (pix_fmt == AV_PIX_FMT_NONE) { |
| 373 | enum AVCodecID codec_id = av_codec_get_id(tags, bih->biCompression); |
| 374 | AVCodec *codec = avcodec_find_decoder(codec_id); |
| 375 | if (codec_id == AV_CODEC_ID_NONE || !codec) { |
| 376 | av_log(avctx, AV_LOG_INFO, " unknown compression type 0x%X", (int) bih->biCompression); |
| 377 | } else { |
| 378 | av_log(avctx, AV_LOG_INFO, " vcodec=%s", codec->name); |
| 379 | } |
| 380 | } else { |
| 381 | av_log(avctx, AV_LOG_INFO, " pixel_format=%s", av_get_pix_fmt_name(pix_fmt)); |
| 382 | } |
| 383 | av_log(avctx, AV_LOG_INFO, " min s=%ldx%ld fps=%g max s=%ldx%ld fps=%g\n", |
| 384 | vcaps->MinOutputSize.cx, vcaps->MinOutputSize.cy, |
| 385 | 1e7 / vcaps->MaxFrameInterval, |
| 386 | vcaps->MaxOutputSize.cx, vcaps->MaxOutputSize.cy, |
| 387 | 1e7 / vcaps->MinFrameInterval); |
| 388 | continue; |
| 389 | } |
| 390 | if (ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO) { |
| 391 | if (ctx->video_codec_id != av_codec_get_id(tags, bih->biCompression)) |
| 392 | goto next; |
| 393 | } |
| 394 | if (ctx->pixel_format != AV_PIX_FMT_NONE && |
| 395 | ctx->pixel_format != dshow_pixfmt(bih->biCompression, bih->biBitCount)) { |
| 396 | goto next; |
| 397 | } |
| 398 | if (ctx->framerate) { |
| 399 | int64_t framerate = ((int64_t) ctx->requested_framerate.den*10000000) |
| 400 | / ctx->requested_framerate.num; |
| 401 | if (framerate > vcaps->MaxFrameInterval || |
| 402 | framerate < vcaps->MinFrameInterval) |
| 403 | goto next; |
| 404 | *fr = framerate; |
| 405 | } |
| 406 | if (ctx->requested_width && ctx->requested_height) { |
| 407 | if (ctx->requested_width > vcaps->MaxOutputSize.cx || |
| 408 | ctx->requested_width < vcaps->MinOutputSize.cx || |
| 409 | ctx->requested_height > vcaps->MaxOutputSize.cy || |
| 410 | ctx->requested_height < vcaps->MinOutputSize.cy) |
| 411 | goto next; |
| 412 | bih->biWidth = ctx->requested_width; |
| 413 | bih->biHeight = ctx->requested_height; |
| 414 | } |
| 415 | } else { |
| 416 | AUDIO_STREAM_CONFIG_CAPS *acaps = caps; |
| 417 | WAVEFORMATEX *fx; |
| 418 | #if DSHOWDEBUG |
| 419 | ff_print_AUDIO_STREAM_CONFIG_CAPS(acaps); |
| 420 | #endif |
| 421 | if (IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx)) { |
| 422 | fx = (void *) type->pbFormat; |
| 423 | } else { |
| 424 | goto next; |
| 425 | } |
| 426 | if (!pformat_set) { |
| 427 | av_log(avctx, AV_LOG_INFO, " min ch=%lu bits=%lu rate=%6lu max ch=%lu bits=%lu rate=%6lu\n", |
| 428 | acaps->MinimumChannels, acaps->MinimumBitsPerSample, acaps->MinimumSampleFrequency, |
| 429 | acaps->MaximumChannels, acaps->MaximumBitsPerSample, acaps->MaximumSampleFrequency); |
| 430 | continue; |
| 431 | } |
| 432 | if (ctx->sample_rate) { |
| 433 | if (ctx->sample_rate > acaps->MaximumSampleFrequency || |
| 434 | ctx->sample_rate < acaps->MinimumSampleFrequency) |
| 435 | goto next; |
| 436 | fx->nSamplesPerSec = ctx->sample_rate; |
| 437 | } |
| 438 | if (ctx->sample_size) { |
| 439 | if (ctx->sample_size > acaps->MaximumBitsPerSample || |
| 440 | ctx->sample_size < acaps->MinimumBitsPerSample) |
| 441 | goto next; |
| 442 | fx->wBitsPerSample = ctx->sample_size; |
| 443 | } |
| 444 | if (ctx->channels) { |
| 445 | if (ctx->channels > acaps->MaximumChannels || |
| 446 | ctx->channels < acaps->MinimumChannels) |
| 447 | goto next; |
| 448 | fx->nChannels = ctx->channels; |
| 449 | } |
| 450 | } |
| 451 | if (IAMStreamConfig_SetFormat(config, type) != S_OK) |
| 452 | goto next; |
| 453 | format_set = 1; |
| 454 | next: |
| 455 | if (type->pbFormat) |
| 456 | CoTaskMemFree(type->pbFormat); |
| 457 | CoTaskMemFree(type); |
| 458 | } |
| 459 | end: |
| 460 | IAMStreamConfig_Release(config); |
| 461 | if (caps) |
| 462 | av_free(caps); |
| 463 | if (pformat_set) |
| 464 | *pformat_set = format_set; |
| 465 | } |
| 466 | |
| 467 | /** |
| 468 | * Set audio device buffer size in milliseconds (which can directly impact |
| 469 | * latency, depending on the device). |
| 470 | */ |
| 471 | static int |
| 472 | dshow_set_audio_buffer_size(AVFormatContext *avctx, IPin *pin) |
| 473 | { |
| 474 | struct dshow_ctx *ctx = avctx->priv_data; |
| 475 | IAMBufferNegotiation *buffer_negotiation = NULL; |
| 476 | ALLOCATOR_PROPERTIES props = { -1, -1, -1, -1 }; |
| 477 | IAMStreamConfig *config = NULL; |
| 478 | AM_MEDIA_TYPE *type = NULL; |
| 479 | int ret = AVERROR(EIO); |
| 480 | |
| 481 | if (IPin_QueryInterface(pin, &IID_IAMStreamConfig, (void **) &config) != S_OK) |
| 482 | goto end; |
| 483 | if (IAMStreamConfig_GetFormat(config, &type) != S_OK) |
| 484 | goto end; |
| 485 | if (!IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx)) |
| 486 | goto end; |
| 487 | |
| 488 | props.cbBuffer = (((WAVEFORMATEX *) type->pbFormat)->nAvgBytesPerSec) |
| 489 | * ctx->audio_buffer_size / 1000; |
| 490 | |
| 491 | if (IPin_QueryInterface(pin, &IID_IAMBufferNegotiation, (void **) &buffer_negotiation) != S_OK) |
| 492 | goto end; |
| 493 | if (IAMBufferNegotiation_SuggestAllocatorProperties(buffer_negotiation, &props) != S_OK) |
| 494 | goto end; |
| 495 | |
| 496 | ret = 0; |
| 497 | |
| 498 | end: |
| 499 | if (buffer_negotiation) |
| 500 | IAMBufferNegotiation_Release(buffer_negotiation); |
| 501 | if (type) { |
| 502 | if (type->pbFormat) |
| 503 | CoTaskMemFree(type->pbFormat); |
| 504 | CoTaskMemFree(type); |
| 505 | } |
| 506 | if (config) |
| 507 | IAMStreamConfig_Release(config); |
| 508 | |
| 509 | return ret; |
| 510 | } |
| 511 | |
| 512 | /** |
| 513 | * Cycle through available pins using the device_filter device, of type |
| 514 | * devtype, retrieve the first output pin and return the pointer to the |
| 515 | * object found in *ppin. |
| 516 | * If ppin is NULL, cycle through all pins listing audio/video capabilities. |
| 517 | */ |
| 518 | static int |
| 519 | dshow_cycle_pins(AVFormatContext *avctx, enum dshowDeviceType devtype, |
| 520 | IBaseFilter *device_filter, IPin **ppin) |
| 521 | { |
| 522 | struct dshow_ctx *ctx = avctx->priv_data; |
| 523 | IEnumPins *pins = 0; |
| 524 | IPin *device_pin = NULL; |
| 525 | IPin *pin; |
| 526 | int r; |
| 527 | |
| 528 | const GUID *mediatype[2] = { &MEDIATYPE_Video, &MEDIATYPE_Audio }; |
| 529 | const char *devtypename = (devtype == VideoDevice) ? "video" : "audio"; |
| 530 | |
| 531 | int set_format = (devtype == VideoDevice && (ctx->framerate || |
| 532 | (ctx->requested_width && ctx->requested_height) || |
| 533 | ctx->pixel_format != AV_PIX_FMT_NONE || |
| 534 | ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO)) |
| 535 | || (devtype == AudioDevice && (ctx->channels || ctx->sample_rate)); |
| 536 | int format_set = 0; |
| 537 | |
| 538 | r = IBaseFilter_EnumPins(device_filter, &pins); |
| 539 | if (r != S_OK) { |
| 540 | av_log(avctx, AV_LOG_ERROR, "Could not enumerate pins.\n"); |
| 541 | return AVERROR(EIO); |
| 542 | } |
| 543 | |
| 544 | if (!ppin) { |
| 545 | av_log(avctx, AV_LOG_INFO, "DirectShow %s device options\n", |
| 546 | devtypename); |
| 547 | } |
| 548 | while (!device_pin && IEnumPins_Next(pins, 1, &pin, NULL) == S_OK) { |
| 549 | IKsPropertySet *p = NULL; |
| 550 | IEnumMediaTypes *types = NULL; |
| 551 | PIN_INFO info = {0}; |
| 552 | AM_MEDIA_TYPE *type; |
| 553 | GUID category; |
| 554 | DWORD r2; |
| 555 | |
| 556 | IPin_QueryPinInfo(pin, &info); |
| 557 | IBaseFilter_Release(info.pFilter); |
| 558 | |
| 559 | if (info.dir != PINDIR_OUTPUT) |
| 560 | goto next; |
| 561 | if (IPin_QueryInterface(pin, &IID_IKsPropertySet, (void **) &p) != S_OK) |
| 562 | goto next; |
| 563 | if (IKsPropertySet_Get(p, &ROPSETID_Pin, AMPROPERTY_PIN_CATEGORY, |
| 564 | NULL, 0, &category, sizeof(GUID), &r2) != S_OK) |
| 565 | goto next; |
| 566 | if (!IsEqualGUID(&category, &PIN_CATEGORY_CAPTURE)) |
| 567 | goto next; |
| 568 | |
| 569 | if (!ppin) { |
| 570 | char *buf = dup_wchar_to_utf8(info.achName); |
| 571 | av_log(avctx, AV_LOG_INFO, " Pin \"%s\"\n", buf); |
| 572 | av_free(buf); |
| 573 | dshow_cycle_formats(avctx, devtype, pin, NULL); |
| 574 | goto next; |
| 575 | } |
| 576 | if (set_format) { |
| 577 | dshow_cycle_formats(avctx, devtype, pin, &format_set); |
| 578 | if (!format_set) { |
| 579 | goto next; |
| 580 | } |
| 581 | } |
| 582 | if (devtype == AudioDevice && ctx->audio_buffer_size) { |
| 583 | if (dshow_set_audio_buffer_size(avctx, pin) < 0) { |
| 584 | av_log(avctx, AV_LOG_ERROR, "unable to set audio buffer size %d to pin, using pin anyway...", ctx->audio_buffer_size); |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | if (IPin_EnumMediaTypes(pin, &types) != S_OK) |
| 589 | goto next; |
| 590 | |
| 591 | IEnumMediaTypes_Reset(types); |
| 592 | while (!device_pin && IEnumMediaTypes_Next(types, 1, &type, NULL) == S_OK) { |
| 593 | if (IsEqualGUID(&type->majortype, mediatype[devtype])) { |
| 594 | device_pin = pin; |
| 595 | goto next; |
| 596 | } |
| 597 | CoTaskMemFree(type); |
| 598 | } |
| 599 | |
| 600 | next: |
| 601 | if (types) |
| 602 | IEnumMediaTypes_Release(types); |
| 603 | if (p) |
| 604 | IKsPropertySet_Release(p); |
| 605 | if (device_pin != pin) |
| 606 | IPin_Release(pin); |
| 607 | } |
| 608 | |
| 609 | IEnumPins_Release(pins); |
| 610 | |
| 611 | if (ppin) { |
| 612 | if (set_format && !format_set) { |
| 613 | av_log(avctx, AV_LOG_ERROR, "Could not set %s options\n", devtypename); |
| 614 | return AVERROR(EIO); |
| 615 | } |
| 616 | if (!device_pin) { |
| 617 | av_log(avctx, AV_LOG_ERROR, |
| 618 | "Could not find output pin from %s capture device.\n", devtypename); |
| 619 | return AVERROR(EIO); |
| 620 | } |
| 621 | *ppin = device_pin; |
| 622 | } |
| 623 | |
| 624 | return 0; |
| 625 | } |
| 626 | |
| 627 | /** |
| 628 | * List options for device with type devtype. |
| 629 | * |
| 630 | * @param devenum device enumerator used for accessing the device |
| 631 | */ |
| 632 | static int |
| 633 | dshow_list_device_options(AVFormatContext *avctx, ICreateDevEnum *devenum, |
| 634 | enum dshowDeviceType devtype) |
| 635 | { |
| 636 | struct dshow_ctx *ctx = avctx->priv_data; |
| 637 | IBaseFilter *device_filter = NULL; |
| 638 | int r; |
| 639 | |
| 640 | if ((r = dshow_cycle_devices(avctx, devenum, devtype, &device_filter)) < 0) |
| 641 | return r; |
| 642 | ctx->device_filter[devtype] = device_filter; |
| 643 | if ((r = dshow_cycle_pins(avctx, devtype, device_filter, NULL)) < 0) |
| 644 | return r; |
| 645 | |
| 646 | return 0; |
| 647 | } |
| 648 | |
| 649 | static int |
| 650 | dshow_open_device(AVFormatContext *avctx, ICreateDevEnum *devenum, |
| 651 | enum dshowDeviceType devtype) |
| 652 | { |
| 653 | struct dshow_ctx *ctx = avctx->priv_data; |
| 654 | IBaseFilter *device_filter = NULL; |
| 655 | IGraphBuilder *graph = ctx->graph; |
| 656 | IPin *device_pin = NULL; |
| 657 | libAVPin *capture_pin = NULL; |
| 658 | libAVFilter *capture_filter = NULL; |
| 659 | int ret = AVERROR(EIO); |
| 660 | int r; |
| 661 | |
| 662 | const wchar_t *filter_name[2] = { L"Audio capture filter", L"Video capture filter" }; |
| 663 | |
| 664 | if ((r = dshow_cycle_devices(avctx, devenum, devtype, &device_filter)) < 0) { |
| 665 | ret = r; |
| 666 | goto error; |
| 667 | } |
| 668 | |
| 669 | ctx->device_filter [devtype] = device_filter; |
| 670 | |
| 671 | r = IGraphBuilder_AddFilter(graph, device_filter, NULL); |
| 672 | if (r != S_OK) { |
| 673 | av_log(avctx, AV_LOG_ERROR, "Could not add device filter to graph.\n"); |
| 674 | goto error; |
| 675 | } |
| 676 | |
| 677 | if ((r = dshow_cycle_pins(avctx, devtype, device_filter, &device_pin)) < 0) { |
| 678 | ret = r; |
| 679 | goto error; |
| 680 | } |
| 681 | ctx->device_pin[devtype] = device_pin; |
| 682 | |
| 683 | capture_filter = libAVFilter_Create(avctx, callback, devtype); |
| 684 | if (!capture_filter) { |
| 685 | av_log(avctx, AV_LOG_ERROR, "Could not create grabber filter.\n"); |
| 686 | goto error; |
| 687 | } |
| 688 | ctx->capture_filter[devtype] = capture_filter; |
| 689 | |
| 690 | r = IGraphBuilder_AddFilter(graph, (IBaseFilter *) capture_filter, |
| 691 | filter_name[devtype]); |
| 692 | if (r != S_OK) { |
| 693 | av_log(avctx, AV_LOG_ERROR, "Could not add capture filter to graph\n"); |
| 694 | goto error; |
| 695 | } |
| 696 | |
| 697 | libAVPin_AddRef(capture_filter->pin); |
| 698 | capture_pin = capture_filter->pin; |
| 699 | ctx->capture_pin[devtype] = capture_pin; |
| 700 | |
| 701 | r = IGraphBuilder_ConnectDirect(graph, device_pin, (IPin *) capture_pin, NULL); |
| 702 | if (r != S_OK) { |
| 703 | av_log(avctx, AV_LOG_ERROR, "Could not connect pins\n"); |
| 704 | goto error; |
| 705 | } |
| 706 | |
| 707 | ret = 0; |
| 708 | |
| 709 | error: |
| 710 | return ret; |
| 711 | } |
| 712 | |
| 713 | static enum AVCodecID waveform_codec_id(enum AVSampleFormat sample_fmt) |
| 714 | { |
| 715 | switch (sample_fmt) { |
| 716 | case AV_SAMPLE_FMT_U8: return AV_CODEC_ID_PCM_U8; |
| 717 | case AV_SAMPLE_FMT_S16: return AV_CODEC_ID_PCM_S16LE; |
| 718 | case AV_SAMPLE_FMT_S32: return AV_CODEC_ID_PCM_S32LE; |
| 719 | default: return AV_CODEC_ID_NONE; /* Should never happen. */ |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | static enum AVSampleFormat sample_fmt_bits_per_sample(int bits) |
| 724 | { |
| 725 | switch (bits) { |
| 726 | case 8: return AV_SAMPLE_FMT_U8; |
| 727 | case 16: return AV_SAMPLE_FMT_S16; |
| 728 | case 32: return AV_SAMPLE_FMT_S32; |
| 729 | default: return AV_SAMPLE_FMT_NONE; /* Should never happen. */ |
| 730 | } |
| 731 | } |
| 732 | |
| 733 | static int |
| 734 | dshow_add_device(AVFormatContext *avctx, |
| 735 | enum dshowDeviceType devtype) |
| 736 | { |
| 737 | struct dshow_ctx *ctx = avctx->priv_data; |
| 738 | AM_MEDIA_TYPE type; |
| 739 | AVCodecContext *codec; |
| 740 | AVStream *st; |
| 741 | int ret = AVERROR(EIO); |
| 742 | |
| 743 | st = avformat_new_stream(avctx, NULL); |
| 744 | if (!st) { |
| 745 | ret = AVERROR(ENOMEM); |
| 746 | goto error; |
| 747 | } |
| 748 | st->id = devtype; |
| 749 | |
| 750 | ctx->capture_filter[devtype]->stream_index = st->index; |
| 751 | |
| 752 | libAVPin_ConnectionMediaType(ctx->capture_pin[devtype], &type); |
| 753 | |
| 754 | codec = st->codec; |
| 755 | if (devtype == VideoDevice) { |
| 756 | BITMAPINFOHEADER *bih = NULL; |
| 757 | AVRational time_base; |
| 758 | |
| 759 | if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo)) { |
| 760 | VIDEOINFOHEADER *v = (void *) type.pbFormat; |
| 761 | time_base = (AVRational) { v->AvgTimePerFrame, 10000000 }; |
| 762 | bih = &v->bmiHeader; |
| 763 | } else if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo2)) { |
| 764 | VIDEOINFOHEADER2 *v = (void *) type.pbFormat; |
| 765 | time_base = (AVRational) { v->AvgTimePerFrame, 10000000 }; |
| 766 | bih = &v->bmiHeader; |
| 767 | } |
| 768 | if (!bih) { |
| 769 | av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n"); |
| 770 | goto error; |
| 771 | } |
| 772 | |
| 773 | codec->time_base = time_base; |
| 774 | codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| 775 | codec->width = bih->biWidth; |
| 776 | codec->height = bih->biHeight; |
| 777 | codec->codec_tag = bih->biCompression; |
| 778 | codec->pix_fmt = dshow_pixfmt(bih->biCompression, bih->biBitCount); |
| 779 | if (bih->biCompression == MKTAG('H', 'D', 'Y', 'C')) { |
| 780 | av_log(avctx, AV_LOG_DEBUG, "attempt to use full range for HDYC...\n"); |
| 781 | codec->color_range = AVCOL_RANGE_MPEG; // just in case it needs this... |
| 782 | } |
| 783 | if (codec->pix_fmt == AV_PIX_FMT_NONE) { |
| 784 | const AVCodecTag *const tags[] = { avformat_get_riff_video_tags(), NULL }; |
| 785 | codec->codec_id = av_codec_get_id(tags, bih->biCompression); |
| 786 | if (codec->codec_id == AV_CODEC_ID_NONE) { |
| 787 | av_log(avctx, AV_LOG_ERROR, "Unknown compression type. " |
| 788 | "Please report type 0x%X.\n", (int) bih->biCompression); |
| 789 | return AVERROR_PATCHWELCOME; |
| 790 | } |
| 791 | codec->bits_per_coded_sample = bih->biBitCount; |
| 792 | } else { |
| 793 | codec->codec_id = AV_CODEC_ID_RAWVIDEO; |
| 794 | if (bih->biCompression == BI_RGB || bih->biCompression == BI_BITFIELDS) { |
| 795 | codec->bits_per_coded_sample = bih->biBitCount; |
| 796 | codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE); |
| 797 | if (codec->extradata) { |
| 798 | codec->extradata_size = 9; |
| 799 | memcpy(codec->extradata, "BottomUp", 9); |
| 800 | } |
| 801 | } |
| 802 | } |
| 803 | } else { |
| 804 | WAVEFORMATEX *fx = NULL; |
| 805 | |
| 806 | if (IsEqualGUID(&type.formattype, &FORMAT_WaveFormatEx)) { |
| 807 | fx = (void *) type.pbFormat; |
| 808 | } |
| 809 | if (!fx) { |
| 810 | av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n"); |
| 811 | goto error; |
| 812 | } |
| 813 | |
| 814 | codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| 815 | codec->sample_fmt = sample_fmt_bits_per_sample(fx->wBitsPerSample); |
| 816 | codec->codec_id = waveform_codec_id(codec->sample_fmt); |
| 817 | codec->sample_rate = fx->nSamplesPerSec; |
| 818 | codec->channels = fx->nChannels; |
| 819 | } |
| 820 | |
| 821 | avpriv_set_pts_info(st, 64, 1, 10000000); |
| 822 | |
| 823 | ret = 0; |
| 824 | |
| 825 | error: |
| 826 | return ret; |
| 827 | } |
| 828 | |
| 829 | static int parse_device_name(AVFormatContext *avctx) |
| 830 | { |
| 831 | struct dshow_ctx *ctx = avctx->priv_data; |
| 832 | char **device_name = ctx->device_name; |
| 833 | char *name = av_strdup(avctx->filename); |
| 834 | char *tmp = name; |
| 835 | int ret = 1; |
| 836 | char *type; |
| 837 | |
| 838 | while ((type = strtok(tmp, "="))) { |
| 839 | char *token = strtok(NULL, ":"); |
| 840 | tmp = NULL; |
| 841 | |
| 842 | if (!strcmp(type, "video")) { |
| 843 | device_name[0] = token; |
| 844 | } else if (!strcmp(type, "audio")) { |
| 845 | device_name[1] = token; |
| 846 | } else { |
| 847 | device_name[0] = NULL; |
| 848 | device_name[1] = NULL; |
| 849 | break; |
| 850 | } |
| 851 | } |
| 852 | |
| 853 | if (!device_name[0] && !device_name[1]) { |
| 854 | ret = 0; |
| 855 | } else { |
| 856 | if (device_name[0]) |
| 857 | device_name[0] = av_strdup(device_name[0]); |
| 858 | if (device_name[1]) |
| 859 | device_name[1] = av_strdup(device_name[1]); |
| 860 | } |
| 861 | |
| 862 | av_free(name); |
| 863 | return ret; |
| 864 | } |
| 865 | |
| 866 | static int dshow_read_header(AVFormatContext *avctx) |
| 867 | { |
| 868 | struct dshow_ctx *ctx = avctx->priv_data; |
| 869 | IGraphBuilder *graph = NULL; |
| 870 | ICreateDevEnum *devenum = NULL; |
| 871 | IMediaControl *control = NULL; |
| 872 | IMediaEvent *media_event = NULL; |
| 873 | HANDLE media_event_handle; |
| 874 | HANDLE proc; |
| 875 | int ret = AVERROR(EIO); |
| 876 | int r; |
| 877 | |
| 878 | CoInitialize(0); |
| 879 | |
| 880 | if (!ctx->list_devices && !parse_device_name(avctx)) { |
| 881 | av_log(avctx, AV_LOG_ERROR, "Malformed dshow input string.\n"); |
| 882 | goto error; |
| 883 | } |
| 884 | |
| 885 | ctx->video_codec_id = avctx->video_codec_id ? avctx->video_codec_id |
| 886 | : AV_CODEC_ID_RAWVIDEO; |
| 887 | if (ctx->pixel_format != AV_PIX_FMT_NONE) { |
| 888 | if (ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO) { |
| 889 | av_log(avctx, AV_LOG_ERROR, "Pixel format may only be set when " |
| 890 | "video codec is not set or set to rawvideo\n"); |
| 891 | ret = AVERROR(EINVAL); |
| 892 | goto error; |
| 893 | } |
| 894 | } |
| 895 | if (ctx->framerate) { |
| 896 | r = av_parse_video_rate(&ctx->requested_framerate, ctx->framerate); |
| 897 | if (r < 0) { |
| 898 | av_log(avctx, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", ctx->framerate); |
| 899 | goto error; |
| 900 | } |
| 901 | } |
| 902 | |
| 903 | r = CoCreateInstance(&CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, |
| 904 | &IID_IGraphBuilder, (void **) &graph); |
| 905 | if (r != S_OK) { |
| 906 | av_log(avctx, AV_LOG_ERROR, "Could not create capture graph.\n"); |
| 907 | goto error; |
| 908 | } |
| 909 | ctx->graph = graph; |
| 910 | |
| 911 | r = CoCreateInstance(&CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, |
| 912 | &IID_ICreateDevEnum, (void **) &devenum); |
| 913 | if (r != S_OK) { |
| 914 | av_log(avctx, AV_LOG_ERROR, "Could not enumerate system devices.\n"); |
| 915 | goto error; |
| 916 | } |
| 917 | |
| 918 | if (ctx->list_devices) { |
| 919 | av_log(avctx, AV_LOG_INFO, "DirectShow video devices\n"); |
| 920 | dshow_cycle_devices(avctx, devenum, VideoDevice, NULL); |
| 921 | av_log(avctx, AV_LOG_INFO, "DirectShow audio devices\n"); |
| 922 | dshow_cycle_devices(avctx, devenum, AudioDevice, NULL); |
| 923 | ret = AVERROR_EXIT; |
| 924 | goto error; |
| 925 | } |
| 926 | if (ctx->list_options) { |
| 927 | if (ctx->device_name[VideoDevice]) |
| 928 | dshow_list_device_options(avctx, devenum, VideoDevice); |
| 929 | if (ctx->device_name[AudioDevice]) |
| 930 | dshow_list_device_options(avctx, devenum, AudioDevice); |
| 931 | ret = AVERROR_EXIT; |
| 932 | goto error; |
| 933 | } |
| 934 | |
| 935 | if (ctx->device_name[VideoDevice]) { |
| 936 | if ((r = dshow_open_device(avctx, devenum, VideoDevice)) < 0 || |
| 937 | (r = dshow_add_device(avctx, VideoDevice)) < 0) { |
| 938 | ret = r; |
| 939 | goto error; |
| 940 | } |
| 941 | } |
| 942 | if (ctx->device_name[AudioDevice]) { |
| 943 | if ((r = dshow_open_device(avctx, devenum, AudioDevice)) < 0 || |
| 944 | (r = dshow_add_device(avctx, AudioDevice)) < 0) { |
| 945 | ret = r; |
| 946 | goto error; |
| 947 | } |
| 948 | } |
| 949 | ctx->curbufsize[0] = 0; |
| 950 | ctx->curbufsize[1] = 0; |
| 951 | ctx->mutex = CreateMutex(NULL, 0, NULL); |
| 952 | if (!ctx->mutex) { |
| 953 | av_log(avctx, AV_LOG_ERROR, "Could not create Mutex\n"); |
| 954 | goto error; |
| 955 | } |
| 956 | ctx->event[1] = CreateEvent(NULL, 1, 0, NULL); |
| 957 | if (!ctx->event[1]) { |
| 958 | av_log(avctx, AV_LOG_ERROR, "Could not create Event\n"); |
| 959 | goto error; |
| 960 | } |
| 961 | |
| 962 | r = IGraphBuilder_QueryInterface(graph, &IID_IMediaControl, (void **) &control); |
| 963 | if (r != S_OK) { |
| 964 | av_log(avctx, AV_LOG_ERROR, "Could not get media control.\n"); |
| 965 | goto error; |
| 966 | } |
| 967 | ctx->control = control; |
| 968 | |
| 969 | r = IGraphBuilder_QueryInterface(graph, &IID_IMediaEvent, (void **) &media_event); |
| 970 | if (r != S_OK) { |
| 971 | av_log(avctx, AV_LOG_ERROR, "Could not get media event.\n"); |
| 972 | goto error; |
| 973 | } |
| 974 | ctx->media_event = media_event; |
| 975 | |
| 976 | r = IMediaEvent_GetEventHandle(media_event, (void *) &media_event_handle); |
| 977 | if (r != S_OK) { |
| 978 | av_log(avctx, AV_LOG_ERROR, "Could not get media event handle.\n"); |
| 979 | goto error; |
| 980 | } |
| 981 | proc = GetCurrentProcess(); |
| 982 | r = DuplicateHandle(proc, media_event_handle, proc, &ctx->event[0], |
| 983 | 0, 0, DUPLICATE_SAME_ACCESS); |
| 984 | if (!r) { |
| 985 | av_log(avctx, AV_LOG_ERROR, "Could not duplicate media event handle.\n"); |
| 986 | goto error; |
| 987 | } |
| 988 | |
| 989 | r = IMediaControl_Run(control); |
| 990 | if (r == S_FALSE) { |
| 991 | OAFilterState pfs; |
| 992 | r = IMediaControl_GetState(control, 0, &pfs); |
| 993 | } |
| 994 | if (r != S_OK) { |
| 995 | av_log(avctx, AV_LOG_ERROR, "Could not run filter\n"); |
| 996 | goto error; |
| 997 | } |
| 998 | |
| 999 | ret = 0; |
| 1000 | |
| 1001 | error: |
| 1002 | |
| 1003 | if (devenum) |
| 1004 | ICreateDevEnum_Release(devenum); |
| 1005 | |
| 1006 | if (ret < 0) |
| 1007 | dshow_read_close(avctx); |
| 1008 | |
| 1009 | return ret; |
| 1010 | } |
| 1011 | |
| 1012 | /** |
| 1013 | * Checks media events from DirectShow and returns -1 on error or EOF. Also |
| 1014 | * purges all events that might be in the event queue to stop the trigger |
| 1015 | * of event notification. |
| 1016 | */ |
| 1017 | static int dshow_check_event_queue(IMediaEvent *media_event) |
| 1018 | { |
| 1019 | LONG_PTR p1, p2; |
| 1020 | long code; |
| 1021 | int ret = 0; |
| 1022 | |
| 1023 | while (IMediaEvent_GetEvent(media_event, &code, &p1, &p2, 0) != E_ABORT) { |
| 1024 | if (code == EC_COMPLETE || code == EC_DEVICE_LOST || code == EC_ERRORABORT) |
| 1025 | ret = -1; |
| 1026 | IMediaEvent_FreeEventParams(media_event, code, p1, p2); |
| 1027 | } |
| 1028 | |
| 1029 | return ret; |
| 1030 | } |
| 1031 | |
| 1032 | static int dshow_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 1033 | { |
| 1034 | struct dshow_ctx *ctx = s->priv_data; |
| 1035 | AVPacketList *pktl = NULL; |
| 1036 | |
| 1037 | while (!ctx->eof && !pktl) { |
| 1038 | WaitForSingleObject(ctx->mutex, INFINITE); |
| 1039 | pktl = ctx->pktl; |
| 1040 | if (pktl) { |
| 1041 | *pkt = pktl->pkt; |
| 1042 | ctx->pktl = ctx->pktl->next; |
| 1043 | av_free(pktl); |
| 1044 | ctx->curbufsize[pkt->stream_index] -= pkt->size; |
| 1045 | } |
| 1046 | ResetEvent(ctx->event[1]); |
| 1047 | ReleaseMutex(ctx->mutex); |
| 1048 | if (!pktl) { |
| 1049 | if (dshow_check_event_queue(ctx->media_event) < 0) { |
| 1050 | ctx->eof = 1; |
| 1051 | } else if (s->flags & AVFMT_FLAG_NONBLOCK) { |
| 1052 | return AVERROR(EAGAIN); |
| 1053 | } else { |
| 1054 | WaitForMultipleObjects(2, ctx->event, 0, INFINITE); |
| 1055 | } |
| 1056 | } |
| 1057 | } |
| 1058 | |
| 1059 | return ctx->eof ? AVERROR(EIO) : pkt->size; |
| 1060 | } |
| 1061 | |
| 1062 | #define OFFSET(x) offsetof(struct dshow_ctx, x) |
| 1063 | #define DEC AV_OPT_FLAG_DECODING_PARAM |
| 1064 | static const AVOption options[] = { |
| 1065 | { "video_size", "set video size given a string such as 640x480 or hd720.", OFFSET(requested_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC }, |
| 1066 | { "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, INT_MAX, DEC }, |
| 1067 | { "framerate", "set video frame rate", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, |
| 1068 | { "sample_rate", "set audio sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC }, |
| 1069 | { "sample_size", "set audio sample size", OFFSET(sample_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 16, DEC }, |
| 1070 | { "channels", "set number of audio channels, such as 1 or 2", OFFSET(channels), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC }, |
| 1071 | { "list_devices", "list available devices", OFFSET(list_devices), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, DEC, "list_devices" }, |
| 1072 | { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "list_devices" }, |
| 1073 | { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "list_devices" }, |
| 1074 | { "list_options", "list available options for specified device", OFFSET(list_options), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, DEC, "list_options" }, |
| 1075 | { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "list_options" }, |
| 1076 | { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "list_options" }, |
| 1077 | { "video_device_number", "set video device number for devices with same name (starts at 0)", OFFSET(video_device_number), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC }, |
| 1078 | { "audio_device_number", "set audio device number for devices with same name (starts at 0)", OFFSET(audio_device_number), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC }, |
| 1079 | { "audio_buffer_size", "set audio device buffer latency size in milliseconds (default is the device's default)", OFFSET(audio_buffer_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC }, |
| 1080 | { NULL }, |
| 1081 | }; |
| 1082 | |
| 1083 | static const AVClass dshow_class = { |
| 1084 | .class_name = "dshow indev", |
| 1085 | .item_name = av_default_item_name, |
| 1086 | .option = options, |
| 1087 | .version = LIBAVUTIL_VERSION_INT, |
| 1088 | .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT, |
| 1089 | }; |
| 1090 | |
| 1091 | AVInputFormat ff_dshow_demuxer = { |
| 1092 | .name = "dshow", |
| 1093 | .long_name = NULL_IF_CONFIG_SMALL("DirectShow capture"), |
| 1094 | .priv_data_size = sizeof(struct dshow_ctx), |
| 1095 | .read_header = dshow_read_header, |
| 1096 | .read_packet = dshow_read_packet, |
| 1097 | .read_close = dshow_read_close, |
| 1098 | .flags = AVFMT_NOFILE, |
| 1099 | .priv_class = &dshow_class, |
| 1100 | }; |