--- /dev/null
+/*
+ * Blackmagic DeckLink output
+ * Copyright (c) 2013-2014 Luca Barbato, Deti Fliegl
+ *
+ * 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 <DeckLinkAPI.h>
+
+#include <pthread.h>
+#include <semaphore.h>
+
+extern "C" {
+#include "libavformat/avformat.h"
+#include "libavformat/internal.h"
+#include "libavutil/imgutils.h"
+}
+
+#include "decklink_common.h"
+#include "decklink_dec.h"
+
+static void avpacket_queue_init(AVFormatContext *avctx, AVPacketQueue *q)
+{
+ memset(q, 0, sizeof(AVPacketQueue));
+ pthread_mutex_init(&q->mutex, NULL);
+ pthread_cond_init(&q->cond, NULL);
+ q->avctx = avctx;
+}
+
+static void avpacket_queue_flush(AVPacketQueue *q)
+{
+ AVPacketList *pkt, *pkt1;
+
+ pthread_mutex_lock(&q->mutex);
+ for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
+ pkt1 = pkt->next;
+ av_free_packet(&pkt->pkt);
+ av_freep(&pkt);
+ }
+ q->last_pkt = NULL;
+ q->first_pkt = NULL;
+ q->nb_packets = 0;
+ q->size = 0;
+ pthread_mutex_unlock(&q->mutex);
+}
+
+static void avpacket_queue_end(AVPacketQueue *q)
+{
+ avpacket_queue_flush(q);
+ pthread_mutex_destroy(&q->mutex);
+ pthread_cond_destroy(&q->cond);
+}
+
+static unsigned long long avpacket_queue_size(AVPacketQueue *q)
+{
+ unsigned long long size;
+ pthread_mutex_lock(&q->mutex);
+ size = q->size;
+ pthread_mutex_unlock(&q->mutex);
+ return size;
+}
+
+static int avpacket_queue_put(AVPacketQueue *q, AVPacket *pkt)
+{
+ AVPacketList *pkt1;
+
+ // Drop Packet if queue size is > 1GB
+ if (avpacket_queue_size(q) > 1024 * 1024 * 1024 ) {
+ av_log(q->avctx, AV_LOG_WARNING, "Decklink input buffer overrun!\n");
+ return -1;
+ }
+ /* duplicate the packet */
+ if (av_dup_packet(pkt) < 0) {
+ return -1;
+ }
+
+ pkt1 = (AVPacketList *)av_malloc(sizeof(AVPacketList));
+ if (!pkt1) {
+ return -1;
+ }
+ pkt1->pkt = *pkt;
+ pkt1->next = NULL;
+
+ pthread_mutex_lock(&q->mutex);
+
+ if (!q->last_pkt) {
+ q->first_pkt = pkt1;
+ } else {
+ q->last_pkt->next = pkt1;
+ }
+
+ q->last_pkt = pkt1;
+ q->nb_packets++;
+ q->size += pkt1->pkt.size + sizeof(*pkt1);
+
+ pthread_cond_signal(&q->cond);
+
+ pthread_mutex_unlock(&q->mutex);
+ return 0;
+}
+
+static int avpacket_queue_get(AVPacketQueue *q, AVPacket *pkt, int block)
+{
+ AVPacketList *pkt1;
+ int ret;
+
+ pthread_mutex_lock(&q->mutex);
+
+ for (;; ) {
+ pkt1 = q->first_pkt;
+ if (pkt1) {
+ q->first_pkt = pkt1->next;
+ if (!q->first_pkt) {
+ q->last_pkt = NULL;
+ }
+ q->nb_packets--;
+ q->size -= pkt1->pkt.size + sizeof(*pkt1);
+ *pkt = pkt1->pkt;
+ av_free(pkt1);
+ ret = 1;
+ break;
+ } else if (!block) {
+ ret = 0;
+ break;
+ } else {
+ pthread_cond_wait(&q->cond, &q->mutex);
+ }
+ }
+ pthread_mutex_unlock(&q->mutex);
+ return ret;
+}
+
+class decklink_input_callback : public IDeckLinkInputCallback
+{
+public:
+ decklink_input_callback(AVFormatContext *_avctx);
+ ~decklink_input_callback();
+
+ virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
+ virtual ULONG STDMETHODCALLTYPE AddRef(void);
+ virtual ULONG STDMETHODCALLTYPE Release(void);
+ virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(BMDVideoInputFormatChangedEvents, IDeckLinkDisplayMode*, BMDDetectedVideoInputFormatFlags);
+ virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(IDeckLinkVideoInputFrame*, IDeckLinkAudioInputPacket*);
+
+private:
+ ULONG m_refCount;
+ pthread_mutex_t m_mutex;
+ AVFormatContext *avctx;
+ decklink_ctx *ctx;
+ int no_video;
+ int64_t initial_video_pts;
+ int64_t initial_audio_pts;
+};
+
+decklink_input_callback::decklink_input_callback(AVFormatContext *_avctx) : m_refCount(0)
+{
+ avctx = _avctx;
+ decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
+ ctx = (struct decklink_ctx *) cctx->ctx;
+ initial_audio_pts = initial_video_pts = AV_NOPTS_VALUE;
+ pthread_mutex_init(&m_mutex, NULL);
+}
+
+decklink_input_callback::~decklink_input_callback()
+{
+ pthread_mutex_destroy(&m_mutex);
+}
+
+ULONG decklink_input_callback::AddRef(void)
+{
+ pthread_mutex_lock(&m_mutex);
+ m_refCount++;
+ pthread_mutex_unlock(&m_mutex);
+
+ return (ULONG)m_refCount;
+}
+
+ULONG decklink_input_callback::Release(void)
+{
+ pthread_mutex_lock(&m_mutex);
+ m_refCount--;
+ pthread_mutex_unlock(&m_mutex);
+
+ if (m_refCount == 0) {
+ delete this;
+ return 0;
+ }
+
+ return (ULONG)m_refCount;
+}
+
+HRESULT decklink_input_callback::VideoInputFrameArrived(
+ IDeckLinkVideoInputFrame *videoFrame, IDeckLinkAudioInputPacket *audioFrame)
+{
+ void *frameBytes;
+ void *audioFrameBytes;
+ BMDTimeValue frameTime;
+ BMDTimeValue frameDuration;
+
+ ctx->frameCount++;
+
+ // Handle Video Frame
+ if (videoFrame) {
+ AVPacket pkt;
+ AVCodecContext *c;
+ av_init_packet(&pkt);
+ c = ctx->video_st->codec;
+ if (ctx->frameCount % 25 == 0) {
+ unsigned long long qsize = avpacket_queue_size(&ctx->queue);
+ av_log(avctx, AV_LOG_DEBUG,
+ "Frame received (#%lu) - Valid (%liB) - QSize %fMB\n",
+ ctx->frameCount,
+ videoFrame->GetRowBytes() * videoFrame->GetHeight(),
+ (double)qsize / 1024 / 1024);
+ }
+
+ videoFrame->GetBytes(&frameBytes);
+ videoFrame->GetStreamTime(&frameTime, &frameDuration,
+ ctx->video_st->time_base.den);
+
+ if (videoFrame->GetFlags() & bmdFrameHasNoInputSource) {
+ unsigned bars[8] = {
+ 0xEA80EA80, 0xD292D210, 0xA910A9A5, 0x90229035,
+ 0x6ADD6ACA, 0x51EF515A, 0x286D28EF, 0x10801080 };
+ int width = videoFrame->GetWidth();
+ int height = videoFrame->GetHeight();
+ unsigned *p = (unsigned *)frameBytes;
+
+ for (int y = 0; y < height; y++) {
+ for (int x = 0; x < width; x += 2)
+ *p++ = bars[(x * 8) / width];
+ }
+
+ if (!no_video) {
+ av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - No input signal detected "
+ "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);
+ }
+ no_video = 1;
+ } else {
+ if (no_video) {
+ av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - Input returned "
+ "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);
+ }
+ no_video = 0;
+ }
+
+ pkt.pts = frameTime / ctx->video_st->time_base.num;
+
+ if (initial_video_pts == AV_NOPTS_VALUE) {
+ initial_video_pts = pkt.pts;
+ }
+
+ pkt.pts -= initial_video_pts;
+ pkt.dts = pkt.pts;
+
+ pkt.duration = frameDuration;
+ //To be made sure it still applies
+ pkt.flags |= AV_PKT_FLAG_KEY;
+ pkt.stream_index = ctx->video_st->index;
+ pkt.data = (uint8_t *)frameBytes;
+ pkt.size = videoFrame->GetRowBytes() *
+ videoFrame->GetHeight();
+ //fprintf(stderr,"Video Frame size %d ts %d\n", pkt.size, pkt.pts);
+ c->frame_number++;
+ if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {
+ ++ctx->dropped;
+ }
+ }
+
+ // Handle Audio Frame
+ if (audioFrame) {
+ AVCodecContext *c;
+ AVPacket pkt;
+ BMDTimeValue audio_pts;
+ av_init_packet(&pkt);
+
+ c = ctx->audio_st->codec;
+ //hack among hacks
+ pkt.size = audioFrame->GetSampleFrameCount() * ctx->audio_st->codec->channels * (16 / 8);
+ audioFrame->GetBytes(&audioFrameBytes);
+ audioFrame->GetPacketTime(&audio_pts, ctx->audio_st->time_base.den);
+ pkt.pts = audio_pts / ctx->audio_st->time_base.num;
+
+ if (initial_audio_pts == AV_NOPTS_VALUE) {
+ initial_audio_pts = pkt.pts;
+ }
+
+ pkt.pts -= initial_audio_pts;
+ pkt.dts = pkt.pts;
+
+ //fprintf(stderr,"Audio Frame size %d ts %d\n", pkt.size, pkt.pts);
+ pkt.flags |= AV_PKT_FLAG_KEY;
+ pkt.stream_index = ctx->audio_st->index;
+ pkt.data = (uint8_t *)audioFrameBytes;
+
+ c->frame_number++;
+ if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {
+ ++ctx->dropped;
+ }
+ }
+
+ return S_OK;
+}
+
+HRESULT decklink_input_callback::VideoInputFormatChanged(
+ BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode *mode,
+ BMDDetectedVideoInputFormatFlags)
+{
+ return S_OK;
+}
+
+static HRESULT decklink_start_input(AVFormatContext *avctx)
+{
+ struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
+ struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx;
+
+ ctx->input_callback = new decklink_input_callback(avctx);
+ ctx->dli->SetCallback(ctx->input_callback);
+ return ctx->dli->StartStreams();
+}
+
+extern "C" {
+
+av_cold int ff_decklink_read_close(AVFormatContext *avctx)
+{
+ struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
+ struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx;
+
+ if (ctx->capture_started) {
+ ctx->dli->StopStreams();
+ ctx->dli->DisableVideoInput();
+ ctx->dli->DisableAudioInput();
+ }
+
+ if (ctx->dli)
+ ctx->dli->Release();
+ if (ctx->dl)
+ ctx->dl->Release();
+
+ avpacket_queue_end(&ctx->queue);
+
+ av_freep(&cctx->ctx);
+
+ return 0;
+}
+
+av_cold int ff_decklink_read_header(AVFormatContext *avctx)
+{
+ struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
+ struct decklink_ctx *ctx;
+ IDeckLinkDisplayModeIterator *itermode;
+ IDeckLinkIterator *iter;
+ IDeckLink *dl = NULL;
+ AVStream *st;
+ HRESULT result;
+ char fname[1024];
+ char *tmp;
+ int mode_num = 0;
+
+ 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;
+
+ iter = CreateDeckLinkIteratorInstance();
+ if (!iter) {
+ av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");
+ return AVERROR(EIO);
+ }
+
+ /* List available devices. */
+ if (ctx->list_devices) {
+ ff_decklink_list_devices(avctx);
+ return AVERROR_EXIT;
+ }
+
+ strcpy (fname, avctx->filename);
+ tmp=strchr (fname, '@');
+ if (tmp != NULL) {
+ mode_num = atoi (tmp+1);
+ *tmp = 0;
+ }
+
+ /* Open device. */
+ while (iter->Next(&dl) == S_OK) {
+ const char *displayName;
+ ff_decklink_get_display_name(dl, &displayName);
+ if (!strcmp(fname, displayName)) {
+ av_free((void *) displayName);
+ ctx->dl = dl;
+ break;
+ }
+ av_free((void *) displayName);
+ dl->Release();
+ }
+ iter->Release();
+ if (!ctx->dl) {
+ av_log(avctx, AV_LOG_ERROR, "Could not open '%s'\n", fname);
+ return AVERROR(EIO);
+ }
+
+ /* Get input device. */
+ if (ctx->dl->QueryInterface(IID_IDeckLinkInput, (void **) &ctx->dli) != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Could not open output device from '%s'\n",
+ avctx->filename);
+ ctx->dl->Release();
+ return AVERROR(EIO);
+ }
+
+ /* List supported formats. */
+ if (ctx->list_formats) {
+ ff_decklink_list_formats(avctx, DIRECTION_IN);
+ ctx->dli->Release();
+ ctx->dl->Release();
+ return AVERROR_EXIT;
+ }
+
+ if (ctx->dli->GetDisplayModeIterator(&itermode) != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
+ ctx->dl->Release();
+ return AVERROR(EIO);
+ }
+
+ if (mode_num > 0) {
+ if (ff_decklink_set_format(avctx, DIRECTION_IN, mode_num) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Could not set mode %d for %s\n", mode_num, fname);
+ goto error;
+ }
+ }
+
+ itermode->Release();
+
+ /* Setup streams. */
+ st = avformat_new_stream(avctx, NULL);
+ if (!st) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
+ goto error;
+ }
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
+ st->codec->sample_rate = bmdAudioSampleRate48kHz;
+ st->codec->channels = 2;
+ avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
+ ctx->audio_st=st;
+
+ st = avformat_new_stream(avctx, NULL);
+ if (!st) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
+ goto error;
+ }
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
+ st->codec->width = ctx->bmd_width;
+ st->codec->height = ctx->bmd_height;
+
+ st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
+ st->codec->time_base.den = ctx->bmd_tb_den;
+ st->codec->time_base.num = ctx->bmd_tb_num;
+ st->codec->bit_rate = avpicture_get_size(st->codec->pix_fmt, ctx->bmd_width, ctx->bmd_height) * 1/av_q2d(st->codec->time_base) * 8;
+ st->codec->codec_tag = MKTAG('U', 'Y', 'V', 'Y');
+
+ avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
+
+ ctx->video_st=st;
+
+ result = ctx->dli->EnableAudioInput(bmdAudioSampleRate48kHz, bmdAudioSampleType16bitInteger, 2);
+
+ if (result != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot enable audio input\n");
+ goto error;
+ }
+
+ result = ctx->dli->EnableVideoInput(ctx->bmd_mode, bmdFormat8BitYUV, bmdVideoInputFlagDefault);
+
+ if (result != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot enable video input\n");
+ goto error;
+ }
+
+ avpacket_queue_init (avctx, &ctx->queue);
+
+ if (decklink_start_input (avctx) != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot start input stream\n");
+ goto error;
+ }
+
+ return 0;
+
+error:
+
+ ctx->dli->Release();
+ ctx->dl->Release();
+
+ return AVERROR(EIO);
+}
+
+int ff_decklink_read_packet(AVFormatContext *avctx, AVPacket *pkt)
+{
+ struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
+ struct decklink_ctx *ctx = (struct decklink_ctx *) cctx->ctx;
+ AVFrame *frame = ctx->video_st->codec->coded_frame;
+
+ avpacket_queue_get(&ctx->queue, pkt, 1);
+ if (frame && (ctx->bmd_field_dominance == bmdUpperFieldFirst || ctx->bmd_field_dominance == bmdLowerFieldFirst)) {
+ frame->interlaced_frame = 1;
+ if (ctx->bmd_field_dominance == bmdUpperFieldFirst) {
+ frame->top_field_first = 1;
+ }
+ }
+
+ return 0;
+}
+
+} /* extern "C" */
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