| /* |
| * Blackmagic DeckLink output |
| * Copyright (c) 2013-2014 Ramiro Polla |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <atomic> |
| using std::atomic; |
| |
| /* Include internal.h first to avoid conflict between winsock.h (used by |
| * DeckLink headers) and winsock2.h (used by libavformat) in MSVC++ builds */ |
| extern "C" { |
| #include "libavformat/internal.h" |
| } |
| |
| #include <DeckLinkAPI.h> |
| |
| extern "C" { |
| #include "libavformat/avformat.h" |
| #include "libavutil/imgutils.h" |
| #include "avdevice.h" |
| } |
| |
| #include "decklink_common.h" |
| #include "decklink_enc.h" |
| |
| |
| /* DeckLink callback class declaration */ |
| class decklink_frame : public IDeckLinkVideoFrame |
| { |
| public: |
| decklink_frame(struct decklink_ctx *ctx, AVFrame *avframe, AVCodecID codec_id, int height, int width) : |
| _ctx(ctx), _avframe(avframe), _avpacket(NULL), _codec_id(codec_id), _height(height), _width(width), _refs(1) { } |
| decklink_frame(struct decklink_ctx *ctx, AVPacket *avpacket, AVCodecID codec_id, int height, int width) : |
| _ctx(ctx), _avframe(NULL), _avpacket(avpacket), _codec_id(codec_id), _height(height), _width(width), _refs(1) { } |
| |
| virtual long STDMETHODCALLTYPE GetWidth (void) { return _width; } |
| virtual long STDMETHODCALLTYPE GetHeight (void) { return _height; } |
| virtual long STDMETHODCALLTYPE GetRowBytes (void) |
| { |
| if (_codec_id == AV_CODEC_ID_WRAPPED_AVFRAME) |
| return _avframe->linesize[0] < 0 ? -_avframe->linesize[0] : _avframe->linesize[0]; |
| else |
| return ((GetWidth() + 47) / 48) * 128; |
| } |
| virtual BMDPixelFormat STDMETHODCALLTYPE GetPixelFormat(void) |
| { |
| if (_codec_id == AV_CODEC_ID_WRAPPED_AVFRAME) |
| return bmdFormat8BitYUV; |
| else |
| return bmdFormat10BitYUV; |
| } |
| virtual BMDFrameFlags STDMETHODCALLTYPE GetFlags (void) |
| { |
| if (_codec_id == AV_CODEC_ID_WRAPPED_AVFRAME) |
| return _avframe->linesize[0] < 0 ? bmdFrameFlagFlipVertical : bmdFrameFlagDefault; |
| else |
| return bmdFrameFlagDefault; |
| } |
| |
| virtual HRESULT STDMETHODCALLTYPE GetBytes (void **buffer) |
| { |
| if (_codec_id == AV_CODEC_ID_WRAPPED_AVFRAME) { |
| if (_avframe->linesize[0] < 0) |
| *buffer = (void *)(_avframe->data[0] + _avframe->linesize[0] * (_avframe->height - 1)); |
| else |
| *buffer = (void *)(_avframe->data[0]); |
| } else { |
| *buffer = (void *)(_avpacket->data); |
| } |
| return S_OK; |
| } |
| |
| virtual HRESULT STDMETHODCALLTYPE GetTimecode (BMDTimecodeFormat format, IDeckLinkTimecode **timecode) { return S_FALSE; } |
| virtual HRESULT STDMETHODCALLTYPE GetAncillaryData(IDeckLinkVideoFrameAncillary **ancillary) { return S_FALSE; } |
| |
| virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; } |
| virtual ULONG STDMETHODCALLTYPE AddRef(void) { return ++_refs; } |
| virtual ULONG STDMETHODCALLTYPE Release(void) |
| { |
| int ret = --_refs; |
| if (!ret) { |
| av_frame_free(&_avframe); |
| av_packet_free(&_avpacket); |
| delete this; |
| } |
| return ret; |
| } |
| |
| struct decklink_ctx *_ctx; |
| AVFrame *_avframe; |
| AVPacket *_avpacket; |
| AVCodecID _codec_id; |
| int _height; |
| int _width; |
| |
| private: |
| std::atomic<int> _refs; |
| }; |
| |
| class decklink_output_callback : public IDeckLinkVideoOutputCallback |
| { |
| public: |
| virtual HRESULT STDMETHODCALLTYPE ScheduledFrameCompleted(IDeckLinkVideoFrame *_frame, BMDOutputFrameCompletionResult result) |
| { |
| decklink_frame *frame = static_cast<decklink_frame *>(_frame); |
| struct decklink_ctx *ctx = frame->_ctx; |
| |
| if (frame->_avframe) |
| av_frame_unref(frame->_avframe); |
| if (frame->_avpacket) |
| av_packet_unref(frame->_avpacket); |
| |
| pthread_mutex_lock(&ctx->mutex); |
| ctx->frames_buffer_available_spots++; |
| pthread_cond_broadcast(&ctx->cond); |
| pthread_mutex_unlock(&ctx->mutex); |
| |
| return S_OK; |
| } |
| virtual HRESULT STDMETHODCALLTYPE ScheduledPlaybackHasStopped(void) { return S_OK; } |
| virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; } |
| virtual ULONG STDMETHODCALLTYPE AddRef(void) { return 1; } |
| virtual ULONG STDMETHODCALLTYPE Release(void) { return 1; } |
| }; |
| |
| static int decklink_setup_video(AVFormatContext *avctx, AVStream *st) |
| { |
| struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data; |
| struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx; |
| AVCodecParameters *c = st->codecpar; |
| |
| if (ctx->video) { |
| av_log(avctx, AV_LOG_ERROR, "Only one video stream is supported!\n"); |
| return -1; |
| } |
| |
| if (c->codec_id == AV_CODEC_ID_WRAPPED_AVFRAME) { |
| if (c->format != AV_PIX_FMT_UYVY422) { |
| av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format!" |
| " Only AV_PIX_FMT_UYVY422 is supported.\n"); |
| return -1; |
| } |
| } else if (c->codec_id != AV_CODEC_ID_V210) { |
| av_log(avctx, AV_LOG_ERROR, "Unsupported codec type!" |
| " Only V210 and wrapped frame with AV_PIX_FMT_UYVY422 are supported.\n"); |
| return -1; |
| } |
| |
| if (ff_decklink_set_format(avctx, c->width, c->height, |
| st->time_base.num, st->time_base.den, c->field_order)) { |
| av_log(avctx, AV_LOG_ERROR, "Unsupported video size, framerate or field order!" |
| " Check available formats with -list_formats 1.\n"); |
| return -1; |
| } |
| if (ctx->dlo->EnableVideoOutput(ctx->bmd_mode, |
| bmdVideoOutputFlagDefault) != S_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Could not enable video output!\n"); |
| return -1; |
| } |
| |
| /* Set callback. */ |
| ctx->output_callback = new decklink_output_callback(); |
| ctx->dlo->SetScheduledFrameCompletionCallback(ctx->output_callback); |
| |
| ctx->frames_preroll = st->time_base.den * ctx->preroll; |
| if (st->time_base.den > 1000) |
| ctx->frames_preroll /= 1000; |
| |
| /* Buffer twice as many frames as the preroll. */ |
| ctx->frames_buffer = ctx->frames_preroll * 2; |
| ctx->frames_buffer = FFMIN(ctx->frames_buffer, 60); |
| pthread_mutex_init(&ctx->mutex, NULL); |
| pthread_cond_init(&ctx->cond, NULL); |
| ctx->frames_buffer_available_spots = ctx->frames_buffer; |
| |
| /* The device expects the framerate to be fixed. */ |
| avpriv_set_pts_info(st, 64, st->time_base.num, st->time_base.den); |
| |
| ctx->video = 1; |
| |
| return 0; |
| } |
| |
| static int decklink_setup_audio(AVFormatContext *avctx, AVStream *st) |
| { |
| struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data; |
| struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx; |
| AVCodecParameters *c = st->codecpar; |
| |
| if (ctx->audio) { |
| av_log(avctx, AV_LOG_ERROR, "Only one audio stream is supported!\n"); |
| return -1; |
| } |
| if (c->sample_rate != 48000) { |
| av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate!" |
| " Only 48kHz is supported.\n"); |
| return -1; |
| } |
| if (c->channels != 2 && c->channels != 8 && c->channels != 16) { |
| av_log(avctx, AV_LOG_ERROR, "Unsupported number of channels!" |
| " Only 2, 8 or 16 channels are supported.\n"); |
| return -1; |
| } |
| if (ctx->dlo->EnableAudioOutput(bmdAudioSampleRate48kHz, |
| bmdAudioSampleType16bitInteger, |
| c->channels, |
| bmdAudioOutputStreamTimestamped) != S_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Could not enable audio output!\n"); |
| return -1; |
| } |
| if (ctx->dlo->BeginAudioPreroll() != S_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Could not begin audio preroll!\n"); |
| return -1; |
| } |
| |
| /* The device expects the sample rate to be fixed. */ |
| avpriv_set_pts_info(st, 64, 1, c->sample_rate); |
| ctx->channels = c->channels; |
| |
| ctx->audio = 1; |
| |
| return 0; |
| } |
| |
| av_cold int ff_decklink_write_trailer(AVFormatContext *avctx) |
| { |
| struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data; |
| struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx; |
| |
| if (ctx->playback_started) { |
| BMDTimeValue actual; |
| ctx->dlo->StopScheduledPlayback(ctx->last_pts * ctx->bmd_tb_num, |
| &actual, ctx->bmd_tb_den); |
| ctx->dlo->DisableVideoOutput(); |
| if (ctx->audio) |
| ctx->dlo->DisableAudioOutput(); |
| } |
| |
| ff_decklink_cleanup(avctx); |
| |
| if (ctx->output_callback) |
| delete ctx->output_callback; |
| |
| pthread_mutex_destroy(&ctx->mutex); |
| pthread_cond_destroy(&ctx->cond); |
| |
| av_freep(&cctx->ctx); |
| |
| return 0; |
| } |
| |
| static int decklink_write_video_packet(AVFormatContext *avctx, AVPacket *pkt) |
| { |
| struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data; |
| struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx; |
| AVStream *st = avctx->streams[pkt->stream_index]; |
| AVFrame *avframe = NULL, *tmp = (AVFrame *)pkt->data; |
| AVPacket *avpacket = NULL; |
| decklink_frame *frame; |
| buffercount_type buffered; |
| HRESULT hr; |
| |
| if (st->codecpar->codec_id == AV_CODEC_ID_WRAPPED_AVFRAME) { |
| if (tmp->format != AV_PIX_FMT_UYVY422 || |
| tmp->width != ctx->bmd_width || |
| tmp->height != ctx->bmd_height) { |
| av_log(avctx, AV_LOG_ERROR, "Got a frame with invalid pixel format or dimension.\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| avframe = av_frame_clone(tmp); |
| if (!avframe) { |
| av_log(avctx, AV_LOG_ERROR, "Could not clone video frame.\n"); |
| return AVERROR(EIO); |
| } |
| |
| frame = new decklink_frame(ctx, avframe, st->codecpar->codec_id, avframe->height, avframe->width); |
| } else { |
| avpacket = av_packet_clone(pkt); |
| if (!avpacket) { |
| av_log(avctx, AV_LOG_ERROR, "Could not clone video frame.\n"); |
| return AVERROR(EIO); |
| } |
| |
| frame = new decklink_frame(ctx, avpacket, st->codecpar->codec_id, ctx->bmd_height, ctx->bmd_width); |
| } |
| |
| if (!frame) { |
| av_log(avctx, AV_LOG_ERROR, "Could not create new frame.\n"); |
| av_frame_free(&avframe); |
| av_packet_free(&avpacket); |
| return AVERROR(EIO); |
| } |
| |
| /* Always keep at most one second of frames buffered. */ |
| pthread_mutex_lock(&ctx->mutex); |
| while (ctx->frames_buffer_available_spots == 0) { |
| pthread_cond_wait(&ctx->cond, &ctx->mutex); |
| } |
| ctx->frames_buffer_available_spots--; |
| pthread_mutex_unlock(&ctx->mutex); |
| |
| /* Schedule frame for playback. */ |
| hr = ctx->dlo->ScheduleVideoFrame((struct IDeckLinkVideoFrame *) frame, |
| pkt->pts * ctx->bmd_tb_num, |
| ctx->bmd_tb_num, ctx->bmd_tb_den); |
| /* Pass ownership to DeckLink, or release on failure */ |
| frame->Release(); |
| if (hr != S_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Could not schedule video frame." |
| " error %08x.\n", (uint32_t) hr); |
| return AVERROR(EIO); |
| } |
| |
| ctx->dlo->GetBufferedVideoFrameCount(&buffered); |
| av_log(avctx, AV_LOG_DEBUG, "Buffered video frames: %d.\n", (int) buffered); |
| if (pkt->pts > 2 && buffered <= 2) |
| av_log(avctx, AV_LOG_WARNING, "There are not enough buffered video frames." |
| " Video may misbehave!\n"); |
| |
| /* Preroll video frames. */ |
| if (!ctx->playback_started && pkt->pts > ctx->frames_preroll) { |
| av_log(avctx, AV_LOG_DEBUG, "Ending audio preroll.\n"); |
| if (ctx->audio && ctx->dlo->EndAudioPreroll() != S_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Could not end audio preroll!\n"); |
| return AVERROR(EIO); |
| } |
| av_log(avctx, AV_LOG_DEBUG, "Starting scheduled playback.\n"); |
| if (ctx->dlo->StartScheduledPlayback(0, ctx->bmd_tb_den, 1.0) != S_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Could not start scheduled playback!\n"); |
| return AVERROR(EIO); |
| } |
| ctx->playback_started = 1; |
| } |
| |
| return 0; |
| } |
| |
| static int decklink_write_audio_packet(AVFormatContext *avctx, AVPacket *pkt) |
| { |
| struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data; |
| struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx; |
| int sample_count = pkt->size / (ctx->channels << 1); |
| buffercount_type buffered; |
| |
| ctx->dlo->GetBufferedAudioSampleFrameCount(&buffered); |
| if (pkt->pts > 1 && !buffered) |
| av_log(avctx, AV_LOG_WARNING, "There's no buffered audio." |
| " Audio will misbehave!\n"); |
| |
| if (ctx->dlo->ScheduleAudioSamples(pkt->data, sample_count, pkt->pts, |
| bmdAudioSampleRate48kHz, NULL) != S_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Could not schedule audio samples.\n"); |
| return AVERROR(EIO); |
| } |
| |
| return 0; |
| } |
| |
| extern "C" { |
| |
| av_cold int ff_decklink_write_header(AVFormatContext *avctx) |
| { |
| struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data; |
| struct decklink_ctx *ctx; |
| unsigned int n; |
| int ret; |
| |
| ctx = (struct decklink_ctx *) av_mallocz(sizeof(struct decklink_ctx)); |
| if (!ctx) |
| return AVERROR(ENOMEM); |
| ctx->list_devices = cctx->list_devices; |
| ctx->list_formats = cctx->list_formats; |
| ctx->preroll = cctx->preroll; |
| cctx->ctx = ctx; |
| |
| /* List available devices and exit. */ |
| if (ctx->list_devices) { |
| ff_decklink_list_devices_legacy(avctx, 0, 1); |
| return AVERROR_EXIT; |
| } |
| |
| ret = ff_decklink_init_device(avctx, avctx->filename); |
| if (ret < 0) |
| return ret; |
| |
| /* Get output device. */ |
| if (ctx->dl->QueryInterface(IID_IDeckLinkOutput, (void **) &ctx->dlo) != S_OK) { |
| av_log(avctx, AV_LOG_ERROR, "Could not open output device from '%s'\n", |
| avctx->filename); |
| ret = AVERROR(EIO); |
| goto error; |
| } |
| |
| /* List supported formats. */ |
| if (ctx->list_formats) { |
| ff_decklink_list_formats(avctx); |
| ret = AVERROR_EXIT; |
| goto error; |
| } |
| |
| /* Setup streams. */ |
| ret = AVERROR(EIO); |
| for (n = 0; n < avctx->nb_streams; n++) { |
| AVStream *st = avctx->streams[n]; |
| AVCodecParameters *c = st->codecpar; |
| if (c->codec_type == AVMEDIA_TYPE_AUDIO) { |
| if (decklink_setup_audio(avctx, st)) |
| goto error; |
| } else if (c->codec_type == AVMEDIA_TYPE_VIDEO) { |
| if (decklink_setup_video(avctx, st)) |
| goto error; |
| } else { |
| av_log(avctx, AV_LOG_ERROR, "Unsupported stream type.\n"); |
| goto error; |
| } |
| } |
| |
| return 0; |
| |
| error: |
| ff_decklink_cleanup(avctx); |
| return ret; |
| } |
| |
| int ff_decklink_write_packet(AVFormatContext *avctx, AVPacket *pkt) |
| { |
| struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data; |
| struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx; |
| AVStream *st = avctx->streams[pkt->stream_index]; |
| |
| ctx->last_pts = FFMAX(ctx->last_pts, pkt->pts); |
| |
| if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) |
| return decklink_write_video_packet(avctx, pkt); |
| else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) |
| return decklink_write_audio_packet(avctx, pkt); |
| |
| return AVERROR(EIO); |
| } |
| |
| int ff_decklink_list_output_devices(AVFormatContext *avctx, struct AVDeviceInfoList *device_list) |
| { |
| return ff_decklink_list_devices(avctx, device_list, 0, 1); |
| } |
| |
| } /* extern "C" */ |
