/* * 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);         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);    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;     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_LIBKLVANCstatic 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. */    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);    } 

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