392 lines
13 KiB
C++
392 lines
13 KiB
C++
/*
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* Blackmagic DeckLink output
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* Copyright (c) 2013-2014 Ramiro Polla
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <DeckLinkAPI.h>
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#include <pthread.h>
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#include <semaphore.h>
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extern "C" {
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#include "libavformat/avformat.h"
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#include "libavformat/internal.h"
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#include "libavutil/imgutils.h"
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}
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#include "decklink_common.h"
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#include "decklink_enc.h"
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/* DeckLink callback class declaration */
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class decklink_frame : public IDeckLinkVideoFrame
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{
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public:
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decklink_frame(struct decklink_ctx *ctx, AVFrame *avframe, long width,
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long height, void *buffer) :
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_ctx(ctx), _avframe(avframe), _width(width),
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_height(height), _buffer(buffer), _refs(0) { }
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virtual long STDMETHODCALLTYPE GetWidth (void) { return _width; }
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virtual long STDMETHODCALLTYPE GetHeight (void) { return _height; }
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virtual long STDMETHODCALLTYPE GetRowBytes (void) { return _width<<1; }
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virtual BMDPixelFormat STDMETHODCALLTYPE GetPixelFormat(void) { return bmdFormat8BitYUV; }
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virtual BMDFrameFlags STDMETHODCALLTYPE GetFlags (void) { return bmdVideoOutputFlagDefault; }
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virtual HRESULT STDMETHODCALLTYPE GetBytes (void **buffer) { *buffer = _buffer; return S_OK; }
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virtual HRESULT STDMETHODCALLTYPE GetTimecode (BMDTimecodeFormat format, IDeckLinkTimecode **timecode) { return S_FALSE; }
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virtual HRESULT STDMETHODCALLTYPE GetAncillaryData(IDeckLinkVideoFrameAncillary **ancillary) { return S_FALSE; }
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virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
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virtual ULONG STDMETHODCALLTYPE AddRef(void) { return ++_refs; }
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virtual ULONG STDMETHODCALLTYPE Release(void) { if (!--_refs) delete this; return _refs; }
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struct decklink_ctx *_ctx;
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AVFrame *_avframe;
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private:
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long _width;
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long _height;
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void *_buffer;
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int _refs;
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};
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class decklink_output_callback : public IDeckLinkVideoOutputCallback
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{
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public:
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virtual HRESULT STDMETHODCALLTYPE ScheduledFrameCompleted(IDeckLinkVideoFrame *_frame, BMDOutputFrameCompletionResult result)
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{
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decklink_frame *frame = static_cast<decklink_frame *>(_frame);
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struct decklink_ctx *ctx = frame->_ctx;
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AVFrame *avframe = frame->_avframe;
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av_frame_free(&avframe);
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sem_post(&ctx->semaphore);
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return S_OK;
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}
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virtual HRESULT STDMETHODCALLTYPE ScheduledPlaybackHasStopped(void) { return S_OK; }
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virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
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virtual ULONG STDMETHODCALLTYPE AddRef(void) { return 1; }
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virtual ULONG STDMETHODCALLTYPE Release(void) { return 1; }
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};
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static int decklink_setup_video(AVFormatContext *avctx, AVStream *st)
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{
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struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
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struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
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AVCodecContext *c = st->codec;
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if (ctx->video) {
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av_log(avctx, AV_LOG_ERROR, "Only one video stream is supported!\n");
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return -1;
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}
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if (c->pix_fmt != AV_PIX_FMT_UYVY422) {
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av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format!"
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" Only AV_PIX_FMT_UYVY422 is supported.\n");
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return -1;
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}
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if (ff_decklink_set_format(avctx, c->width, c->height,
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c->time_base.num, c->time_base.den)) {
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av_log(avctx, AV_LOG_ERROR, "Unsupported video size or framerate!"
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" Check available formats with -list_formats 1.\n");
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return -1;
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}
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if (ctx->dlo->EnableVideoOutput(ctx->bmd_mode,
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bmdVideoOutputFlagDefault) != S_OK) {
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av_log(avctx, AV_LOG_ERROR, "Could not enable video output!\n");
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return -1;
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}
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/* Set callback. */
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ctx->output_callback = new decklink_output_callback();
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ctx->dlo->SetScheduledFrameCompletionCallback(ctx->output_callback);
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/* Start video semaphore. */
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ctx->frames_preroll = c->time_base.den * ctx->preroll;
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if (c->time_base.den > 1000)
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ctx->frames_preroll /= 1000;
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/* Buffer twice as many frames as the preroll. */
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ctx->frames_buffer = ctx->frames_preroll * 2;
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ctx->frames_buffer = FFMIN(ctx->frames_buffer, 60);
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sem_init(&ctx->semaphore, 0, ctx->frames_buffer);
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/* The device expects the framerate to be fixed. */
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avpriv_set_pts_info(st, 64, c->time_base.num, c->time_base.den);
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ctx->video = 1;
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return 0;
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}
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static int decklink_setup_audio(AVFormatContext *avctx, AVStream *st)
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{
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struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
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struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
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AVCodecContext *c = st->codec;
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if (ctx->audio) {
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av_log(avctx, AV_LOG_ERROR, "Only one audio stream is supported!\n");
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return -1;
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}
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if (c->sample_rate != 48000) {
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av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate!"
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" Only 48kHz is supported.\n");
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return -1;
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}
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if (c->channels != 2 && c->channels != 8) {
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av_log(avctx, AV_LOG_ERROR, "Unsupported number of channels!"
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" Only stereo and 7.1 are supported.\n");
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return -1;
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}
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if (ctx->dlo->EnableAudioOutput(bmdAudioSampleRate48kHz,
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bmdAudioSampleType16bitInteger,
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c->channels,
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bmdAudioOutputStreamTimestamped) != S_OK) {
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av_log(avctx, AV_LOG_ERROR, "Could not enable audio output!\n");
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return -1;
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}
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if (ctx->dlo->BeginAudioPreroll() != S_OK) {
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av_log(avctx, AV_LOG_ERROR, "Could not begin audio preroll!\n");
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return -1;
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}
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/* The device expects the sample rate to be fixed. */
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avpriv_set_pts_info(st, 64, 1, c->sample_rate);
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ctx->channels = c->channels;
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ctx->audio = 1;
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return 0;
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}
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av_cold int ff_decklink_write_trailer(AVFormatContext *avctx)
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{
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struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
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struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
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if (ctx->playback_started) {
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BMDTimeValue actual;
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ctx->dlo->StopScheduledPlayback(ctx->last_pts * ctx->bmd_tb_num,
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&actual, ctx->bmd_tb_den);
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ctx->dlo->DisableVideoOutput();
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if (ctx->audio)
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ctx->dlo->DisableAudioOutput();
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}
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ff_decklink_cleanup(avctx);
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if (ctx->output_callback)
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delete ctx->output_callback;
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sem_destroy(&ctx->semaphore);
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av_freep(&cctx->ctx);
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return 0;
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}
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static int decklink_write_video_packet(AVFormatContext *avctx, AVPacket *pkt)
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{
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struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
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struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
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AVPicture *avpicture = (AVPicture *) pkt->data;
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AVFrame *avframe, *tmp;
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decklink_frame *frame;
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buffercount_type buffered;
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HRESULT hr;
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/* HACK while av_uncoded_frame() isn't implemented */
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int ret;
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tmp = av_frame_alloc();
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if (!tmp)
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return AVERROR(ENOMEM);
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tmp->format = AV_PIX_FMT_UYVY422;
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tmp->width = ctx->bmd_width;
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tmp->height = ctx->bmd_height;
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ret = av_frame_get_buffer(tmp, 32);
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if (ret < 0) {
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av_frame_free(&tmp);
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return ret;
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}
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av_image_copy(tmp->data, tmp->linesize, (const uint8_t **) avpicture->data,
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avpicture->linesize, (AVPixelFormat) tmp->format, tmp->width,
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tmp->height);
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avframe = av_frame_clone(tmp);
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av_frame_free(&tmp);
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if (!avframe) {
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av_log(avctx, AV_LOG_ERROR, "Could not clone video frame.\n");
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return AVERROR(EIO);
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}
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/* end HACK */
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frame = new decklink_frame(ctx, avframe, ctx->bmd_width, ctx->bmd_height,
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(void *) avframe->data[0]);
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if (!frame) {
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av_log(avctx, AV_LOG_ERROR, "Could not create new frame.\n");
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return AVERROR(EIO);
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}
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/* Always keep at most one second of frames buffered. */
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sem_wait(&ctx->semaphore);
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/* Schedule frame for playback. */
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hr = ctx->dlo->ScheduleVideoFrame((struct IDeckLinkVideoFrame *) frame,
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pkt->pts * ctx->bmd_tb_num,
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ctx->bmd_tb_num, ctx->bmd_tb_den);
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if (hr != S_OK) {
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av_log(avctx, AV_LOG_ERROR, "Could not schedule video frame."
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" error %08x.\n", (uint32_t) hr);
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frame->Release();
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return AVERROR(EIO);
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}
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ctx->dlo->GetBufferedVideoFrameCount(&buffered);
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av_log(avctx, AV_LOG_DEBUG, "Buffered video frames: %d.\n", (int) buffered);
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if (pkt->pts > 2 && buffered <= 2)
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av_log(avctx, AV_LOG_WARNING, "There are not enough buffered video frames."
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" Video may misbehave!\n");
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/* Preroll video frames. */
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if (!ctx->playback_started && pkt->pts > ctx->frames_preroll) {
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av_log(avctx, AV_LOG_DEBUG, "Ending audio preroll.\n");
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if (ctx->audio && ctx->dlo->EndAudioPreroll() != S_OK) {
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av_log(avctx, AV_LOG_ERROR, "Could not end audio preroll!\n");
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return AVERROR(EIO);
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}
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av_log(avctx, AV_LOG_DEBUG, "Starting scheduled playback.\n");
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if (ctx->dlo->StartScheduledPlayback(0, ctx->bmd_tb_den, 1.0) != S_OK) {
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av_log(avctx, AV_LOG_ERROR, "Could not start scheduled playback!\n");
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return AVERROR(EIO);
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}
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ctx->playback_started = 1;
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}
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return 0;
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}
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static int decklink_write_audio_packet(AVFormatContext *avctx, AVPacket *pkt)
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{
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struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
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struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
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int sample_count = pkt->size / (ctx->channels << 1);
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buffercount_type buffered;
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ctx->dlo->GetBufferedAudioSampleFrameCount(&buffered);
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if (pkt->pts > 1 && !buffered)
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av_log(avctx, AV_LOG_WARNING, "There's no buffered audio."
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" Audio will misbehave!\n");
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if (ctx->dlo->ScheduleAudioSamples(pkt->data, sample_count, pkt->pts,
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bmdAudioSampleRate48kHz, NULL) != S_OK) {
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av_log(avctx, AV_LOG_ERROR, "Could not schedule audio samples.\n");
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return AVERROR(EIO);
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}
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return 0;
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}
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extern "C" {
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av_cold int ff_decklink_write_header(AVFormatContext *avctx)
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{
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struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
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struct decklink_ctx *ctx;
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unsigned int n;
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int ret;
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ctx = (struct decklink_ctx *) av_mallocz(sizeof(struct decklink_ctx));
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if (!ctx)
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return AVERROR(ENOMEM);
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ctx->list_devices = cctx->list_devices;
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ctx->list_formats = cctx->list_formats;
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ctx->preroll = cctx->preroll;
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cctx->ctx = ctx;
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/* List available devices. */
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if (ctx->list_devices) {
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ff_decklink_list_devices(avctx);
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return AVERROR_EXIT;
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}
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ret = ff_decklink_init_device(avctx, avctx->filename);
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if (ret < 0)
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return ret;
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/* Get output device. */
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if (ctx->dl->QueryInterface(IID_IDeckLinkOutput, (void **) &ctx->dlo) != S_OK) {
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av_log(avctx, AV_LOG_ERROR, "Could not open output device from '%s'\n",
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avctx->filename);
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ret = AVERROR(EIO);
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goto error;
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}
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/* List supported formats. */
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if (ctx->list_formats) {
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ff_decklink_list_formats(avctx);
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ret = AVERROR_EXIT;
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goto error;
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}
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/* Setup streams. */
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ret = AVERROR(EIO);
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for (n = 0; n < avctx->nb_streams; n++) {
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AVStream *st = avctx->streams[n];
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AVCodecContext *c = st->codec;
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if (c->codec_type == AVMEDIA_TYPE_AUDIO) {
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if (decklink_setup_audio(avctx, st))
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goto error;
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} else if (c->codec_type == AVMEDIA_TYPE_VIDEO) {
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if (decklink_setup_video(avctx, st))
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goto error;
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} else {
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av_log(avctx, AV_LOG_ERROR, "Unsupported stream type.\n");
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goto error;
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}
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}
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return 0;
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error:
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ff_decklink_cleanup(avctx);
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return ret;
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}
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int ff_decklink_write_packet(AVFormatContext *avctx, AVPacket *pkt)
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{
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struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
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struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
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AVStream *st = avctx->streams[pkt->stream_index];
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ctx->last_pts = FFMAX(ctx->last_pts, pkt->pts);
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if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
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return decklink_write_video_packet(avctx, pkt);
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else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
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return decklink_write_audio_packet(avctx, pkt);
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return AVERROR(EIO);
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}
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} /* extern "C" */
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