/* * 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 "libavcodec/bytestream.h"#include "libavutil/frame.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->codec_id == AV_CODEC_ID_AC3) {        /* Regardless of the number of channels in the codec, we're only           using 2 SDI audio channels at 48000Hz */        ctx->channels = 2;    } else if (c->codec_id == AV_CODEC_ID_PCM_S16LE) {        if (c->sample_rate != 48000) {            av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate!"                   " Only 48kHz is supported.\n");            return -1;        }        if (c->ch_layout.nb_channels != 2 && c->ch_layout.nb_channels != 8 && c->ch_layout.nb_channels != 16) {            av_log(avctx, AV_LOG_ERROR, "Unsupported number of channels!"                   " Only 2, 8 or 16 channels are supported.\n");            return -1;        }        ctx->channels = c->ch_layout.nb_channels;    } else {        av_log(avctx, AV_LOG_ERROR, "Unsupported codec specified!"               " Only PCM_S16LE and AC-3 are supported.\n");        return -1;    }     if (ctx->dlo->EnableAudioOutput(bmdAudioSampleRate48kHz,                                    bmdAudioSampleType16bitInteger,                                    ctx->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, 48000);     ctx->audio = 1;     return 0;} /* Wrap the AC-3 packet into an S337 payload that is in S16LE format which can be easily   injected into the PCM stream.  Note: despite the function name, only AC-3 is implemented */static int create_s337_payload(AVPacket *pkt, uint8_t **outbuf, int *outsize){    /* Note: if the packet size is not divisible by four, we need to make the actual       payload larger to ensure it ends on an two channel S16LE boundary */    int payload_size = FFALIGN(pkt->size, 4) + 8;    uint16_t bitcount = pkt->size * 8;    uint8_t *s337_payload;    PutByteContext pb;     /* Sanity check:  According to SMPTE ST 340:2015 Sec 4.1, the AC-3 sync frame will       exactly match the 1536 samples of baseband (PCM) audio that it represents.  */    if (pkt->size > 1536)        return AVERROR(EINVAL);     /* Encapsulate AC3 syncframe into SMPTE 337 packet */    s337_payload = (uint8_t *) av_malloc(payload_size);    if (s337_payload == NULL)        return AVERROR(ENOMEM);    bytestream2_init_writer(&pb, s337_payload, payload_size);    bytestream2_put_le16u(&pb, 0xf872); /* Sync word 1 */    bytestream2_put_le16u(&pb, 0x4e1f); /* Sync word 1 */    bytestream2_put_le16u(&pb, 0x0001); /* Burst Info, including data type (1=ac3) */    bytestream2_put_le16u(&pb, bitcount); /* Length code */    for (int i = 0; i < (pkt->size - 1); i += 2)        bytestream2_put_le16u(&pb, (pkt->data[i] << 8) | pkt->data[i+1]);     /* Ensure final payload is aligned on 4-byte boundary */    if (pkt->size & 1)        bytestream2_put_le16u(&pb, pkt->data[pkt->size - 1] << 8);    if ((pkt->size & 3) == 1 || (pkt->size & 3) == 2)        bytestream2_put_le16u(&pb, 0);     *outsize = payload_size;    *outbuf = s337_payload;    return 0;} static int decklink_setup_subtitle(AVFormatContext *avctx, AVStream *st){    int ret = -1;     switch(st->codecpar->codec_id) {#if CONFIG_LIBKLVANC    case AV_CODEC_ID_EIA_608:        /* No special setup required */        ret = 0;        break;#endif    default:        av_log(avctx, AV_LOG_ERROR, "Unsupported subtitle codec specified\n");        break;    }     return ret;} static int decklink_setup_data(AVFormatContext *avctx, AVStream *st){    int ret = -1;     switch(st->codecpar->codec_id) {#if CONFIG_LIBKLVANC    case AV_CODEC_ID_SMPTE_2038:        /* No specific setup required */        ret = 0;        break;#endif    default:        av_log(avctx, AV_LOG_ERROR, "Unsupported data codec specified\n");        break;    }     return ret;} 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    ff_decklink_packet_queue_end(&ctx->vanc_queue);     ff_ccfifo_uninit(&ctx->cc_fifo);    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: %" PRId64 "/%" PRId64 "\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;    }} /* See SMPTE ST 2016-3:2009 */static void construct_afd(AVFormatContext *avctx, struct decklink_ctx *ctx,                          AVPacket *pkt, struct klvanc_line_set_s *vanc_lines,                          AVStream *st){    struct klvanc_packet_afd_s *afd = NULL;    uint16_t *afd_words = NULL;    uint16_t len;    size_t size;    int f1_line = 12, f2_line = 0, ret;     const uint8_t *data = av_packet_get_side_data(pkt, AV_PKT_DATA_AFD, &size);    if (!data || size == 0)        return;     ret = klvanc_create_AFD(&afd);    if (ret)        return;     ret = klvanc_set_AFD_val(afd, data[0]);    if (ret) {        av_log(avctx, AV_LOG_ERROR, "Invalid AFD value specified: %d\n",               data[0]);        klvanc_destroy_AFD(afd);        return;    }     /* Compute the AR flag based on the DAR (see ST 2016-1:2009 Sec 9.1).  Note, we treat       anything below 1.4 as 4:3 (as opposed to the standard 1.33), because there are lots       of streams in the field that aren't *exactly* 4:3 but a tiny bit larger after doing       the math... */    if (av_cmp_q((AVRational) {st->codecpar->width * st->codecpar->sample_aspect_ratio.num,                    st->codecpar->height * st->codecpar->sample_aspect_ratio.den}, (AVRational) {14, 10}) == 1)        afd->aspectRatio = ASPECT_16x9;    else        afd->aspectRatio = ASPECT_4x3;     ret = klvanc_convert_AFD_to_words(afd, &afd_words, &len);

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