ffmpeg/libavdevice/decklink_enc.cpp

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/*
* 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/internal.h"
#include "libavutil/imgutils.h"
#include "avdevice.h"
}
#include "decklink_common.h"
#include "decklink_enc.h"
#if CONFIG_LIBKLVANC
#include "libklvanc/vanc.h"
#include "libklvanc/vanc-lines.h"
#include "libklvanc/pixels.h"
#endif
/* 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), _ancillary(NULL), _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), _ancillary(NULL), _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)
{
*ancillary = _ancillary;
if (_ancillary) {
_ancillary->AddRef();
return S_OK;
} else {
return S_FALSE;
}
}
virtual HRESULT STDMETHODCALLTYPE SetAncillaryData(IDeckLinkVideoFrameAncillary *ancillary)
{
if (_ancillary)
_ancillary->Release();
_ancillary = ancillary;
_ancillary->AddRef();
return S_OK;
}
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);
if (_ancillary)
_ancillary->Release();
delete this;
}
return ret;
}
struct decklink_ctx *_ctx;
AVFrame *_avframe;
AVPacket *_avpacket;
AVCodecID _codec_id;
IDeckLinkVideoFrameAncillary *_ancillary;
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);
avdevice/decklink: remove pthread dependency Purpose: avdevice/decklink: Removed pthread dependency by replacing semaphore used in code appropriately. Doing so makes it easier to build ffmpeg using Visual C++ on Windows. This is a contination of Kyle Schwarz's "avdevice/decklink: Remove pthread dependency" patch that is available at https://patchwork.ffmpeg.org/patch/2654/ . This patch wasn't accepted, and as far as I can tell, there was no follow-up after it was rejected. Notes: Used Visual Studio 2015 (with update 3) for this. Comments: -- configure: Eliminated pthreads dependency for decklink_indev_deps and decklink_outdev_deps and replaced with threads dependency -- libavdevice/decklink_common.cpp / .h: a) Eliminated semaphore and replaced with a combination of a mutex, condition variable, and a counter (frames_buffer_available_spots). b) Removed include of pthread.h and semaphore.h and now using libavutil/thread.h instead. -- libavdevice/decklink_dec.cpp: Eliminated include of pthread.h and semaphore.h. -- libavdevice/decklink_enc.cpp: a) Eliminated include of pthread.h and semaphore.h. b) Replaced use of semaphore with the equivalent using a combination of a mutex, condition variable, and a counter (frames_buffer_available_spots). In theory, libavutil/thread.h and the associated code could have been modified instead to add cross-platform implementations of the sem_ functions, but an inspection of the ffmpeg source base indicates that there are only two cases in which semaphores are used (including this one that was replaced), so it was deemed to not be worth the effort. Signed-off-by: Marton Balint <cus@passwd.hu>
2017-04-15 06:41:46 +00:00
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;
}
ctx->raw_format = bmdFormat8BitYUV;
} 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;
} else {
ctx->raw_format = bmdFormat10BitYUV;
}
if (ff_decklink_set_configs(avctx, DIRECTION_OUT) < 0) {
av_log(avctx, AV_LOG_ERROR, "Could not set output configuration\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->supports_vanc && ctx->dlo->EnableVideoOutput(ctx->bmd_mode, bmdVideoOutputVANC) != S_OK) {
av_log(avctx, AV_LOG_WARNING, "Could not enable video output with VANC! Trying without...\n");
ctx->supports_vanc = 0;
}
if (!ctx->supports_vanc && 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);
avdevice/decklink: remove pthread dependency Purpose: avdevice/decklink: Removed pthread dependency by replacing semaphore used in code appropriately. Doing so makes it easier to build ffmpeg using Visual C++ on Windows. This is a contination of Kyle Schwarz's "avdevice/decklink: Remove pthread dependency" patch that is available at https://patchwork.ffmpeg.org/patch/2654/ . This patch wasn't accepted, and as far as I can tell, there was no follow-up after it was rejected. Notes: Used Visual Studio 2015 (with update 3) for this. Comments: -- configure: Eliminated pthreads dependency for decklink_indev_deps and decklink_outdev_deps and replaced with threads dependency -- libavdevice/decklink_common.cpp / .h: a) Eliminated semaphore and replaced with a combination of a mutex, condition variable, and a counter (frames_buffer_available_spots). b) Removed include of pthread.h and semaphore.h and now using libavutil/thread.h instead. -- libavdevice/decklink_dec.cpp: Eliminated include of pthread.h and semaphore.h. -- libavdevice/decklink_enc.cpp: a) Eliminated include of pthread.h and semaphore.h. b) Replaced use of semaphore with the equivalent using a combination of a mutex, condition variable, and a counter (frames_buffer_available_spots). In theory, libavutil/thread.h and the associated code could have been modified instead to add cross-platform implementations of the sem_ functions, but an inspection of the ffmpeg source base indicates that there are only two cases in which semaphores are used (including this one that was replaced), so it was deemed to not be worth the effort. Signed-off-by: Marton Balint <cus@passwd.hu>
2017-04-15 06:41:46 +00:00
pthread_mutex_init(&ctx->mutex, NULL);
pthread_cond_init(&ctx->cond, NULL);
ctx->frames_buffer_available_spots = ctx->frames_buffer;
av_log(avctx, AV_LOG_DEBUG, "output: %s, preroll: %d, frames buffer size: %d\n",
avctx->url, ctx->frames_preroll, 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;
avdevice/decklink: remove pthread dependency Purpose: avdevice/decklink: Removed pthread dependency by replacing semaphore used in code appropriately. Doing so makes it easier to build ffmpeg using Visual C++ on Windows. This is a contination of Kyle Schwarz's "avdevice/decklink: Remove pthread dependency" patch that is available at https://patchwork.ffmpeg.org/patch/2654/ . This patch wasn't accepted, and as far as I can tell, there was no follow-up after it was rejected. Notes: Used Visual Studio 2015 (with update 3) for this. Comments: -- configure: Eliminated pthreads dependency for decklink_indev_deps and decklink_outdev_deps and replaced with threads dependency -- libavdevice/decklink_common.cpp / .h: a) Eliminated semaphore and replaced with a combination of a mutex, condition variable, and a counter (frames_buffer_available_spots). b) Removed include of pthread.h and semaphore.h and now using libavutil/thread.h instead. -- libavdevice/decklink_dec.cpp: Eliminated include of pthread.h and semaphore.h. -- libavdevice/decklink_enc.cpp: a) Eliminated include of pthread.h and semaphore.h. b) Replaced use of semaphore with the equivalent using a combination of a mutex, condition variable, and a counter (frames_buffer_available_spots). In theory, libavutil/thread.h and the associated code could have been modified instead to add cross-platform implementations of the sem_ functions, but an inspection of the ffmpeg source base indicates that there are only two cases in which semaphores are used (including this one that was replaced), so it was deemed to not be worth the effort. Signed-off-by: Marton Balint <cus@passwd.hu>
2017-04-15 06:41:46 +00:00
pthread_mutex_destroy(&ctx->mutex);
pthread_cond_destroy(&ctx->cond);
#if CONFIG_LIBKLVANC
klvanc_context_destroy(ctx->vanc_ctx);
#endif
av_freep(&cctx->ctx);
return 0;
}
#if CONFIG_LIBKLVANC
static void construct_cc(AVFormatContext *avctx, struct decklink_ctx *ctx,
AVPacket *pkt, struct klvanc_line_set_s *vanc_lines)
{
struct klvanc_packet_eia_708b_s *cdp;
uint16_t *cdp_words;
uint16_t len;
uint8_t cc_count;
size_t size;
int ret, i;
const uint8_t *data = av_packet_get_side_data(pkt, AV_PKT_DATA_A53_CC, &size);
if (!data)
return;
cc_count = size / 3;
ret = klvanc_create_eia708_cdp(&cdp);
if (ret)
return;
ret = klvanc_set_framerate_EIA_708B(cdp, ctx->bmd_tb_num, ctx->bmd_tb_den);
if (ret) {
av_log(avctx, AV_LOG_ERROR, "Invalid framerate specified: %lld/%lld\n",
ctx->bmd_tb_num, ctx->bmd_tb_den);
klvanc_destroy_eia708_cdp(cdp);
return;
}
if (cc_count > KLVANC_MAX_CC_COUNT) {
av_log(avctx, AV_LOG_ERROR, "Illegal cc_count received: %d\n", cc_count);
cc_count = KLVANC_MAX_CC_COUNT;
}
/* CC data */
cdp->header.ccdata_present = 1;
cdp->header.caption_service_active = 1;
cdp->ccdata.cc_count = cc_count;
for (i = 0; i < cc_count; i++) {
if (data [3*i] & 0x04)
cdp->ccdata.cc[i].cc_valid = 1;
cdp->ccdata.cc[i].cc_type = data[3*i] & 0x03;
cdp->ccdata.cc[i].cc_data[0] = data[3*i+1];
cdp->ccdata.cc[i].cc_data[1] = data[3*i+2];
}
klvanc_finalize_EIA_708B(cdp, ctx->cdp_sequence_num++);
ret = klvanc_convert_EIA_708B_to_words(cdp, &cdp_words, &len);
klvanc_destroy_eia708_cdp(cdp);
if (ret != 0) {
av_log(avctx, AV_LOG_ERROR, "Failed converting 708 packet to words\n");
return;
}
ret = klvanc_line_insert(ctx->vanc_ctx, vanc_lines, cdp_words, len, 11, 0);
free(cdp_words);
if (ret != 0) {
av_log(avctx, AV_LOG_ERROR, "VANC line insertion failed\n");
return;
}
}
static int decklink_construct_vanc(AVFormatContext *avctx, struct decklink_ctx *ctx,
AVPacket *pkt, decklink_frame *frame)
{
struct klvanc_line_set_s vanc_lines = { 0 };
int ret = 0, i;
if (!ctx->supports_vanc)
return 0;
construct_cc(avctx, ctx, pkt, &vanc_lines);
IDeckLinkVideoFrameAncillary *vanc;
int result = ctx->dlo->CreateAncillaryData(bmdFormat10BitYUV, &vanc);
if (result != S_OK) {
av_log(avctx, AV_LOG_ERROR, "Failed to create vanc\n");
ret = AVERROR(EIO);
goto done;
}
/* Now that we've got all the VANC lines in a nice orderly manner, generate the
final VANC sections for the Decklink output */
for (i = 0; i < vanc_lines.num_lines; i++) {
struct klvanc_line_s *line = vanc_lines.lines[i];
int real_line;
void *buf;
if (!line)
break;
/* FIXME: include hack for certain Decklink cards which mis-represent
line numbers for pSF frames */
real_line = line->line_number;
result = vanc->GetBufferForVerticalBlankingLine(real_line, &buf);
if (result != S_OK) {
av_log(avctx, AV_LOG_ERROR, "Failed to get VANC line %d: %d", real_line, result);
continue;
}
/* Generate the full line taking into account all VANC packets on that line */
result = klvanc_generate_vanc_line_v210(ctx->vanc_ctx, line, (uint8_t *) buf,
ctx->bmd_width);
if (result) {
av_log(avctx, AV_LOG_ERROR, "Failed to generate VANC line\n");
continue;
}
}
result = frame->SetAncillaryData(vanc);
vanc->Release();
if (result != S_OK) {
av_log(avctx, AV_LOG_ERROR, "Failed to set vanc: %d", result);
ret = AVERROR(EIO);
}
done:
for (i = 0; i < vanc_lines.num_lines; i++)
klvanc_line_free(vanc_lines.lines[i]);
return ret;
}
#endif
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;
uint32_t 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 CONFIG_LIBKLVANC
if (decklink_construct_vanc(avctx, ctx, pkt, frame))
av_log(avctx, AV_LOG_ERROR, "Failed to construct VANC\n");
#endif
}
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. */
avdevice/decklink: remove pthread dependency Purpose: avdevice/decklink: Removed pthread dependency by replacing semaphore used in code appropriately. Doing so makes it easier to build ffmpeg using Visual C++ on Windows. This is a contination of Kyle Schwarz's "avdevice/decklink: Remove pthread dependency" patch that is available at https://patchwork.ffmpeg.org/patch/2654/ . This patch wasn't accepted, and as far as I can tell, there was no follow-up after it was rejected. Notes: Used Visual Studio 2015 (with update 3) for this. Comments: -- configure: Eliminated pthreads dependency for decklink_indev_deps and decklink_outdev_deps and replaced with threads dependency -- libavdevice/decklink_common.cpp / .h: a) Eliminated semaphore and replaced with a combination of a mutex, condition variable, and a counter (frames_buffer_available_spots). b) Removed include of pthread.h and semaphore.h and now using libavutil/thread.h instead. -- libavdevice/decklink_dec.cpp: Eliminated include of pthread.h and semaphore.h. -- libavdevice/decklink_enc.cpp: a) Eliminated include of pthread.h and semaphore.h. b) Replaced use of semaphore with the equivalent using a combination of a mutex, condition variable, and a counter (frames_buffer_available_spots). In theory, libavutil/thread.h and the associated code could have been modified instead to add cross-platform implementations of the sem_ functions, but an inspection of the ffmpeg source base indicates that there are only two cases in which semaphores are used (including this one that was replaced), so it was deemed to not be worth the effort. Signed-off-by: Marton Balint <cus@passwd.hu>
2017-04-15 06:41:46 +00:00
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((class 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);
uint32_t 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;
ctx->duplex_mode = cctx->duplex_mode;
if (cctx->link > 0 && (unsigned int)cctx->link < FF_ARRAY_ELEMS(decklink_link_conf_map))
ctx->link = decklink_link_conf_map[cctx->link];
cctx->ctx = ctx;
#if CONFIG_LIBKLVANC
if (klvanc_context_create(&ctx->vanc_ctx) < 0) {
av_log(avctx, AV_LOG_ERROR, "Cannot create VANC library context\n");
return AVERROR(ENOMEM);
}
ctx->supports_vanc = 1;
#endif
/* 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->url);
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->url);
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" */