| 1 | /* |
| 2 | * Blackmagic DeckLink output |
| 3 | * Copyright (c) 2013-2014 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 <DeckLinkAPI.h> |
| 23 | |
| 24 | #include <pthread.h> |
| 25 | #include <semaphore.h> |
| 26 | |
| 27 | extern "C" { |
| 28 | #include "libavformat/avformat.h" |
| 29 | #include "libavformat/internal.h" |
| 30 | #include "libavutil/imgutils.h" |
| 31 | } |
| 32 | |
| 33 | #include "decklink_common.h" |
| 34 | #include "decklink_enc.h" |
| 35 | |
| 36 | |
| 37 | /* DeckLink callback class declaration */ |
| 38 | class decklink_frame : public IDeckLinkVideoFrame |
| 39 | { |
| 40 | public: |
| 41 | decklink_frame(struct decklink_ctx *ctx, AVFrame *avframe, long width, |
| 42 | long height, void *buffer) : |
| 43 | _ctx(ctx), _avframe(avframe), _width(width), |
| 44 | _height(height), _buffer(buffer), _refs(0) { } |
| 45 | |
| 46 | virtual long STDMETHODCALLTYPE GetWidth (void) { return _width; } |
| 47 | virtual long STDMETHODCALLTYPE GetHeight (void) { return _height; } |
| 48 | virtual long STDMETHODCALLTYPE GetRowBytes (void) { return _width<<1; } |
| 49 | virtual BMDPixelFormat STDMETHODCALLTYPE GetPixelFormat(void) { return bmdFormat8BitYUV; } |
| 50 | virtual BMDFrameFlags STDMETHODCALLTYPE GetFlags (void) { return bmdVideoOutputFlagDefault; } |
| 51 | virtual HRESULT STDMETHODCALLTYPE GetBytes (void **buffer) { *buffer = _buffer; return S_OK; } |
| 52 | |
| 53 | virtual HRESULT STDMETHODCALLTYPE GetTimecode (BMDTimecodeFormat format, IDeckLinkTimecode **timecode) { return S_FALSE; } |
| 54 | virtual HRESULT STDMETHODCALLTYPE GetAncillaryData(IDeckLinkVideoFrameAncillary **ancillary) { return S_FALSE; } |
| 55 | |
| 56 | virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; } |
| 57 | virtual ULONG STDMETHODCALLTYPE AddRef(void) { return ++_refs; } |
| 58 | virtual ULONG STDMETHODCALLTYPE Release(void) { if (!--_refs) delete this; return _refs; } |
| 59 | |
| 60 | struct decklink_ctx *_ctx; |
| 61 | AVFrame *_avframe; |
| 62 | |
| 63 | private: |
| 64 | long _width; |
| 65 | long _height; |
| 66 | void *_buffer; |
| 67 | int _refs; |
| 68 | }; |
| 69 | |
| 70 | class decklink_output_callback : public IDeckLinkVideoOutputCallback |
| 71 | { |
| 72 | public: |
| 73 | virtual HRESULT STDMETHODCALLTYPE ScheduledFrameCompleted(IDeckLinkVideoFrame *_frame, BMDOutputFrameCompletionResult result) |
| 74 | { |
| 75 | decklink_frame *frame = static_cast<decklink_frame *>(_frame); |
| 76 | struct decklink_ctx *ctx = frame->_ctx; |
| 77 | AVFrame *avframe = frame->_avframe; |
| 78 | |
| 79 | av_frame_free(&avframe); |
| 80 | |
| 81 | sem_post(&ctx->semaphore); |
| 82 | |
| 83 | return S_OK; |
| 84 | } |
| 85 | virtual HRESULT STDMETHODCALLTYPE ScheduledPlaybackHasStopped(void) { return S_OK; } |
| 86 | virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; } |
| 87 | virtual ULONG STDMETHODCALLTYPE AddRef(void) { return 1; } |
| 88 | virtual ULONG STDMETHODCALLTYPE Release(void) { return 1; } |
| 89 | }; |
| 90 | |
| 91 | static int decklink_setup_video(AVFormatContext *avctx, AVStream *st) |
| 92 | { |
| 93 | struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| 94 | struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
| 95 | AVCodecContext *c = st->codec; |
| 96 | |
| 97 | if (ctx->video) { |
| 98 | av_log(avctx, AV_LOG_ERROR, "Only one video stream is supported!\n"); |
| 99 | return -1; |
| 100 | } |
| 101 | |
| 102 | if (c->pix_fmt != AV_PIX_FMT_UYVY422) { |
| 103 | av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format!" |
| 104 | " Only AV_PIX_FMT_UYVY422 is supported.\n"); |
| 105 | return -1; |
| 106 | } |
| 107 | if (ff_decklink_set_format(avctx, c->width, c->height, |
| 108 | c->time_base.num, c->time_base.den)) { |
| 109 | av_log(avctx, AV_LOG_ERROR, "Unsupported video size or framerate!" |
| 110 | " Check available formats with -list_formats 1.\n"); |
| 111 | return -1; |
| 112 | } |
| 113 | if (ctx->dlo->EnableVideoOutput(ctx->bmd_mode, |
| 114 | bmdVideoOutputFlagDefault) != S_OK) { |
| 115 | av_log(avctx, AV_LOG_ERROR, "Could not enable video output!\n"); |
| 116 | return -1; |
| 117 | } |
| 118 | |
| 119 | /* Set callback. */ |
| 120 | ctx->output_callback = new decklink_output_callback(); |
| 121 | ctx->dlo->SetScheduledFrameCompletionCallback(ctx->output_callback); |
| 122 | |
| 123 | /* Start video semaphore. */ |
| 124 | ctx->frames_preroll = c->time_base.den * ctx->preroll; |
| 125 | if (c->time_base.den > 1000) |
| 126 | ctx->frames_preroll /= 1000; |
| 127 | |
| 128 | /* Buffer twice as many frames as the preroll. */ |
| 129 | ctx->frames_buffer = ctx->frames_preroll * 2; |
| 130 | ctx->frames_buffer = FFMIN(ctx->frames_buffer, 60); |
| 131 | sem_init(&ctx->semaphore, 0, ctx->frames_buffer); |
| 132 | |
| 133 | /* The device expects the framerate to be fixed. */ |
| 134 | avpriv_set_pts_info(st, 64, c->time_base.num, c->time_base.den); |
| 135 | |
| 136 | ctx->video = 1; |
| 137 | |
| 138 | return 0; |
| 139 | } |
| 140 | |
| 141 | static int decklink_setup_audio(AVFormatContext *avctx, AVStream *st) |
| 142 | { |
| 143 | struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| 144 | struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
| 145 | AVCodecContext *c = st->codec; |
| 146 | |
| 147 | if (ctx->audio) { |
| 148 | av_log(avctx, AV_LOG_ERROR, "Only one audio stream is supported!\n"); |
| 149 | return -1; |
| 150 | } |
| 151 | if (c->sample_rate != 48000) { |
| 152 | av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate!" |
| 153 | " Only 48kHz is supported.\n"); |
| 154 | return -1; |
| 155 | } |
| 156 | if (c->channels != 2 && c->channels != 8) { |
| 157 | av_log(avctx, AV_LOG_ERROR, "Unsupported number of channels!" |
| 158 | " Only stereo and 7.1 are supported.\n"); |
| 159 | return -1; |
| 160 | } |
| 161 | if (ctx->dlo->EnableAudioOutput(bmdAudioSampleRate48kHz, |
| 162 | bmdAudioSampleType16bitInteger, |
| 163 | c->channels, |
| 164 | bmdAudioOutputStreamTimestamped) != S_OK) { |
| 165 | av_log(avctx, AV_LOG_ERROR, "Could not enable audio output!\n"); |
| 166 | return -1; |
| 167 | } |
| 168 | if (ctx->dlo->BeginAudioPreroll() != S_OK) { |
| 169 | av_log(avctx, AV_LOG_ERROR, "Could not begin audio preroll!\n"); |
| 170 | return -1; |
| 171 | } |
| 172 | |
| 173 | /* The device expects the sample rate to be fixed. */ |
| 174 | avpriv_set_pts_info(st, 64, 1, c->sample_rate); |
| 175 | ctx->channels = c->channels; |
| 176 | |
| 177 | ctx->audio = 1; |
| 178 | |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | av_cold int ff_decklink_write_trailer(AVFormatContext *avctx) |
| 183 | { |
| 184 | struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| 185 | struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
| 186 | |
| 187 | if (ctx->playback_started) { |
| 188 | BMDTimeValue actual; |
| 189 | ctx->dlo->StopScheduledPlayback(ctx->last_pts * ctx->bmd_tb_num, |
| 190 | &actual, ctx->bmd_tb_den); |
| 191 | ctx->dlo->DisableVideoOutput(); |
| 192 | if (ctx->audio) |
| 193 | ctx->dlo->DisableAudioOutput(); |
| 194 | } |
| 195 | |
| 196 | if (ctx->dlo) |
| 197 | ctx->dlo->Release(); |
| 198 | if (ctx->dl) |
| 199 | ctx->dl->Release(); |
| 200 | |
| 201 | if (ctx->output_callback) |
| 202 | delete ctx->output_callback; |
| 203 | |
| 204 | sem_destroy(&ctx->semaphore); |
| 205 | |
| 206 | av_freep(&cctx->ctx); |
| 207 | |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | static int decklink_write_video_packet(AVFormatContext *avctx, AVPacket *pkt) |
| 212 | { |
| 213 | struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| 214 | struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
| 215 | AVPicture *avpicture = (AVPicture *) pkt->data; |
| 216 | AVFrame *avframe, *tmp; |
| 217 | decklink_frame *frame; |
| 218 | buffercount_type buffered; |
| 219 | HRESULT hr; |
| 220 | |
| 221 | /* HACK while av_uncoded_frame() isn't implemented */ |
| 222 | int ret; |
| 223 | |
| 224 | tmp = av_frame_alloc(); |
| 225 | if (!tmp) |
| 226 | return AVERROR(ENOMEM); |
| 227 | tmp->format = AV_PIX_FMT_UYVY422; |
| 228 | tmp->width = ctx->bmd_width; |
| 229 | tmp->height = ctx->bmd_height; |
| 230 | ret = av_frame_get_buffer(tmp, 32); |
| 231 | if (ret < 0) { |
| 232 | av_frame_free(&tmp); |
| 233 | return ret; |
| 234 | } |
| 235 | av_image_copy(tmp->data, tmp->linesize, (const uint8_t **) avpicture->data, |
| 236 | avpicture->linesize, (AVPixelFormat) tmp->format, tmp->width, |
| 237 | tmp->height); |
| 238 | avframe = av_frame_clone(tmp); |
| 239 | av_frame_free(&tmp); |
| 240 | if (!avframe) { |
| 241 | av_log(avctx, AV_LOG_ERROR, "Could not clone video frame.\n"); |
| 242 | return AVERROR(EIO); |
| 243 | } |
| 244 | /* end HACK */ |
| 245 | |
| 246 | frame = new decklink_frame(ctx, avframe, ctx->bmd_width, ctx->bmd_height, |
| 247 | (void *) avframe->data[0]); |
| 248 | if (!frame) { |
| 249 | av_log(avctx, AV_LOG_ERROR, "Could not create new frame.\n"); |
| 250 | return AVERROR(EIO); |
| 251 | } |
| 252 | |
| 253 | /* Always keep at most one second of frames buffered. */ |
| 254 | sem_wait(&ctx->semaphore); |
| 255 | |
| 256 | /* Schedule frame for playback. */ |
| 257 | hr = ctx->dlo->ScheduleVideoFrame((struct IDeckLinkVideoFrame *) frame, |
| 258 | pkt->pts * ctx->bmd_tb_num, |
| 259 | ctx->bmd_tb_num, ctx->bmd_tb_den); |
| 260 | if (hr != S_OK) { |
| 261 | av_log(avctx, AV_LOG_ERROR, "Could not schedule video frame." |
| 262 | " error %08x.\n", (uint32_t) hr); |
| 263 | frame->Release(); |
| 264 | return AVERROR(EIO); |
| 265 | } |
| 266 | |
| 267 | ctx->dlo->GetBufferedVideoFrameCount(&buffered); |
| 268 | av_log(avctx, AV_LOG_DEBUG, "Buffered video frames: %d.\n", (int) buffered); |
| 269 | if (pkt->pts > 2 && buffered <= 2) |
| 270 | av_log(avctx, AV_LOG_WARNING, "There are not enough buffered video frames." |
| 271 | " Video may misbehave!\n"); |
| 272 | |
| 273 | /* Preroll video frames. */ |
| 274 | if (!ctx->playback_started && pkt->pts > ctx->frames_preroll) { |
| 275 | av_log(avctx, AV_LOG_DEBUG, "Ending audio preroll.\n"); |
| 276 | if (ctx->audio && ctx->dlo->EndAudioPreroll() != S_OK) { |
| 277 | av_log(avctx, AV_LOG_ERROR, "Could not end audio preroll!\n"); |
| 278 | return AVERROR(EIO); |
| 279 | } |
| 280 | av_log(avctx, AV_LOG_DEBUG, "Starting scheduled playback.\n"); |
| 281 | if (ctx->dlo->StartScheduledPlayback(0, ctx->bmd_tb_den, 1.0) != S_OK) { |
| 282 | av_log(avctx, AV_LOG_ERROR, "Could not start scheduled playback!\n"); |
| 283 | return AVERROR(EIO); |
| 284 | } |
| 285 | ctx->playback_started = 1; |
| 286 | } |
| 287 | |
| 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | static int decklink_write_audio_packet(AVFormatContext *avctx, AVPacket *pkt) |
| 292 | { |
| 293 | struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| 294 | struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
| 295 | int sample_count = pkt->size / (ctx->channels << 1); |
| 296 | buffercount_type buffered; |
| 297 | |
| 298 | ctx->dlo->GetBufferedAudioSampleFrameCount(&buffered); |
| 299 | if (pkt->pts > 1 && !buffered) |
| 300 | av_log(avctx, AV_LOG_WARNING, "There's no buffered audio." |
| 301 | " Audio will misbehave!\n"); |
| 302 | |
| 303 | if (ctx->dlo->ScheduleAudioSamples(pkt->data, sample_count, pkt->pts, |
| 304 | bmdAudioSampleRate48kHz, NULL) != S_OK) { |
| 305 | av_log(avctx, AV_LOG_ERROR, "Could not schedule audio samples.\n"); |
| 306 | return AVERROR(EIO); |
| 307 | } |
| 308 | |
| 309 | return 0; |
| 310 | } |
| 311 | |
| 312 | extern "C" { |
| 313 | |
| 314 | av_cold int ff_decklink_write_header(AVFormatContext *avctx) |
| 315 | { |
| 316 | struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| 317 | struct decklink_ctx *ctx; |
| 318 | IDeckLinkDisplayModeIterator *itermode; |
| 319 | IDeckLinkIterator *iter; |
| 320 | IDeckLink *dl = NULL; |
| 321 | unsigned int n; |
| 322 | |
| 323 | ctx = (struct decklink_ctx *) av_mallocz(sizeof(struct decklink_ctx)); |
| 324 | if (!ctx) |
| 325 | return AVERROR(ENOMEM); |
| 326 | ctx->list_devices = cctx->list_devices; |
| 327 | ctx->list_formats = cctx->list_formats; |
| 328 | ctx->preroll = cctx->preroll; |
| 329 | cctx->ctx = ctx; |
| 330 | |
| 331 | iter = CreateDeckLinkIteratorInstance(); |
| 332 | if (!iter) { |
| 333 | av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n"); |
| 334 | return AVERROR(EIO); |
| 335 | } |
| 336 | |
| 337 | /* List available devices. */ |
| 338 | if (ctx->list_devices) { |
| 339 | ff_decklink_list_devices(avctx); |
| 340 | return AVERROR_EXIT; |
| 341 | } |
| 342 | |
| 343 | /* Open device. */ |
| 344 | while (iter->Next(&dl) == S_OK) { |
| 345 | const char *displayName; |
| 346 | ff_decklink_get_display_name(dl, &displayName); |
| 347 | if (!strcmp(avctx->filename, displayName)) { |
| 348 | av_free((void *) displayName); |
| 349 | ctx->dl = dl; |
| 350 | break; |
| 351 | } |
| 352 | av_free((void *) displayName); |
| 353 | dl->Release(); |
| 354 | } |
| 355 | iter->Release(); |
| 356 | if (!ctx->dl) { |
| 357 | av_log(avctx, AV_LOG_ERROR, "Could not open '%s'\n", avctx->filename); |
| 358 | return AVERROR(EIO); |
| 359 | } |
| 360 | |
| 361 | /* Get output device. */ |
| 362 | if (ctx->dl->QueryInterface(IID_IDeckLinkOutput, (void **) &ctx->dlo) != S_OK) { |
| 363 | av_log(avctx, AV_LOG_ERROR, "Could not open output device from '%s'\n", |
| 364 | avctx->filename); |
| 365 | ctx->dl->Release(); |
| 366 | return AVERROR(EIO); |
| 367 | } |
| 368 | |
| 369 | /* List supported formats. */ |
| 370 | if (ctx->list_formats) { |
| 371 | ff_decklink_list_formats(avctx); |
| 372 | ctx->dlo->Release(); |
| 373 | ctx->dl->Release(); |
| 374 | return AVERROR_EXIT; |
| 375 | } |
| 376 | |
| 377 | if (ctx->dlo->GetDisplayModeIterator(&itermode) != S_OK) { |
| 378 | av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n"); |
| 379 | ctx->dl->Release(); |
| 380 | return AVERROR(EIO); |
| 381 | } |
| 382 | |
| 383 | /* Setup streams. */ |
| 384 | for (n = 0; n < avctx->nb_streams; n++) { |
| 385 | AVStream *st = avctx->streams[n]; |
| 386 | AVCodecContext *c = st->codec; |
| 387 | if (c->codec_type == AVMEDIA_TYPE_AUDIO) { |
| 388 | if (decklink_setup_audio(avctx, st)) |
| 389 | goto error; |
| 390 | } else if (c->codec_type == AVMEDIA_TYPE_VIDEO) { |
| 391 | if (decklink_setup_video(avctx, st)) |
| 392 | goto error; |
| 393 | } else { |
| 394 | av_log(avctx, AV_LOG_ERROR, "Unsupported stream type.\n"); |
| 395 | goto error; |
| 396 | } |
| 397 | } |
| 398 | itermode->Release(); |
| 399 | |
| 400 | return 0; |
| 401 | |
| 402 | error: |
| 403 | |
| 404 | ctx->dlo->Release(); |
| 405 | ctx->dl->Release(); |
| 406 | |
| 407 | return AVERROR(EIO); |
| 408 | } |
| 409 | |
| 410 | int ff_decklink_write_packet(AVFormatContext *avctx, AVPacket *pkt) |
| 411 | { |
| 412 | struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data; |
| 413 | struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx; |
| 414 | AVStream *st = avctx->streams[pkt->stream_index]; |
| 415 | |
| 416 | ctx->last_pts = FFMAX(ctx->last_pts, pkt->pts); |
| 417 | |
| 418 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
| 419 | return decklink_write_video_packet(avctx, pkt); |
| 420 | else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) |
| 421 | return decklink_write_audio_packet(avctx, pkt); |
| 422 | |
| 423 | return AVERROR(EIO); |
| 424 | } |
| 425 | |
| 426 | } /* extern "C" */ |