[FFmpeg-cvslog] avdevice: add decklink input support
Deti Fliegl
git at videolan.org
Mon Sep 22 03:08:35 CEST 2014
ffmpeg | branch: master | Deti Fliegl <deti at fliegl.de> | Mon Sep 22 02:46:03 2014 +0200| [bac6cfcb3a1d13c04702e3bd6e54a7515a4c46b9] | committer: Michael Niedermayer
avdevice: add decklink input support
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=bac6cfcb3a1d13c04702e3bd6e54a7515a4c46b9
---
MAINTAINERS | 1 +
configure | 4 +-
doc/indevs.texi | 54 +++++
libavdevice/Makefile | 3 +-
libavdevice/alldevices.c | 2 +-
libavdevice/decklink_dec.cpp | 531 ++++++++++++++++++++++++++++++++++++++++++
libavdevice/decklink_dec.h | 32 +++
libavdevice/decklink_dec_c.c | 54 +++++
8 files changed, 678 insertions(+), 3 deletions(-)
diff --git a/MAINTAINERS b/MAINTAINERS
index 062ff39..545b71e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -309,6 +309,7 @@ libavdevice
avfoundation.m Thilo Borgmann
+ decklink* Deti Fliegl
dshow.c Roger Pack (CC rogerdpack at gmail.com)
fbdev_enc.c Lukasz Marek
gdigrab.c Roger Pack (CC rogerdpack at gmail.com)
diff --git a/configure b/configure
index b9707c5..9b294f8 100755
--- a/configure
+++ b/configure
@@ -256,7 +256,7 @@ External library support:
--enable-libzmq enable message passing via libzmq [no]
--enable-libzvbi enable teletext support via libzvbi [no]
--disable-lzma disable lzma [autodetect]
- --enable-decklink enable Blackmagick DeckLink output [no]
+ --enable-decklink enable Blackmagick DeckLink I/O support [no]
--enable-openal enable OpenAL 1.1 capture support [no]
--enable-opencl enable OpenCL code
--enable-opengl enable OpenGL rendering [no]
@@ -2455,6 +2455,8 @@ bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr
caca_outdev_deps="libcaca"
decklink_outdev_deps="decklink pthreads"
decklink_outdev_extralibs="-lstdc++"
+decklink_indev_deps="decklink pthreads"
+decklink_indev_extralibs="-lstdc++"
dshow_indev_deps="IBaseFilter"
dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
dv1394_indev_deps="dv1394"
diff --git a/doc/indevs.texi b/doc/indevs.texi
index ce409b9..99e1112 100644
--- a/doc/indevs.texi
+++ b/doc/indevs.texi
@@ -922,4 +922,58 @@ Use the MIT-SHM extension for shared memory. Default value is @code{1}.
It may be necessary to disable it for remote displays.
@end table
+ at section decklink
+
+The decklink input device provides capture capabilities for Blackmagic
+DeckLink devices.
+
+To enable this input device, you need the Blackmagic DeckLink SDK and you
+need to configure with the appropriate @code{--extra-cflags}
+and @code{--extra-ldflags}.
+On Windows, you need to run the IDL files through @command{widl}.
+
+DeckLink is very picky about the formats it supports. Pixel format is always
+uyvy422, framerate and video size must be determined for your device with
+ at command{-list_formats 1}. Audio sample rate is always 48 kHz and the number
+of channels currently is limited to 2 (stereo).
+
+ at subsection Options
+
+ at table @option
+
+ at item list_devices
+If set to @option{true}, print a list of devices and exit.
+Defaults to @option{false}.
+
+ at item list_formats
+If set to @option{true}, print a list of supported formats and exit.
+Defaults to @option{false}.
+
+ at end table
+
+ at subsection Examples
+
+ at itemize
+
+ at item
+List input devices:
+ at example
+ffmpeg -f decklink -list_devices 1 -i dummy
+ at end example
+
+ at item
+List supported formats:
+ at example
+ffmpeg -f decklink -list_formats 1 -i 'Intensity Pro'
+ at end example
+
+ at item
+Capture video clip at 1080i50 (format 11):
+ at example
+ffmpeg -f decklink -i 'Intensity Pro@@11' -acodec copy -vcodec copy output.avi
+ at end example
+
+ at end itemize
+
+
@c man end INPUT DEVICES
diff --git a/libavdevice/Makefile b/libavdevice/Makefile
index f90c0f7..8cf98f0 100644
--- a/libavdevice/Makefile
+++ b/libavdevice/Makefile
@@ -17,6 +17,7 @@ OBJS-$(CONFIG_AVFOUNDATION_INDEV) += avfoundation.o
OBJS-$(CONFIG_BKTR_INDEV) += bktr.o
OBJS-$(CONFIG_CACA_OUTDEV) += caca.o
OBJS-$(CONFIG_DECKLINK_OUTDEV) += decklink_enc.o decklink_enc_c.o decklink_common.o
+OBJS-$(CONFIG_DECKLINK_INDEV) += decklink_dec.o decklink_dec_c.o decklink_common.o
OBJS-$(CONFIG_DSHOW_INDEV) += dshow.o dshow_enummediatypes.o \
dshow_enumpins.o dshow_filter.o \
dshow_pin.o dshow_common.o
@@ -57,7 +58,7 @@ OBJS-$(HAVE_LIBC_MSVCRT) += file_open.o
# Windows resource file
SLIBOBJS-$(HAVE_GNU_WINDRES) += avdeviceres.o
-SKIPHEADERS-$(CONFIG_DECKLINK) += decklink_enc.h decklink_common.h
+SKIPHEADERS-$(CONFIG_DECKLINK) += decklink_enc.h decklink_dec.h decklink_common.h
SKIPHEADERS-$(CONFIG_DSHOW_INDEV) += dshow_capture.h
SKIPHEADERS-$(CONFIG_FBDEV_INDEV) += fbdev_common.h
SKIPHEADERS-$(CONFIG_FBDEV_OUTDEV) += fbdev_common.h
diff --git a/libavdevice/alldevices.c b/libavdevice/alldevices.c
index ca34959..b8e7854 100644
--- a/libavdevice/alldevices.c
+++ b/libavdevice/alldevices.c
@@ -50,7 +50,7 @@ void avdevice_register_all(void)
REGISTER_INDEV (AVFOUNDATION, avfoundation);
REGISTER_INDEV (BKTR, bktr);
REGISTER_OUTDEV (CACA, caca);
- REGISTER_OUTDEV (DECKLINK, decklink);
+ REGISTER_INOUTDEV(DECKLINK, decklink);
REGISTER_INDEV (DSHOW, dshow);
REGISTER_INDEV (DV1394, dv1394);
REGISTER_INOUTDEV(FBDEV, fbdev);
diff --git a/libavdevice/decklink_dec.cpp b/libavdevice/decklink_dec.cpp
new file mode 100644
index 0000000..77a0fe5
--- /dev/null
+++ b/libavdevice/decklink_dec.cpp
@@ -0,0 +1,531 @@
+/*
+ * 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" */
diff --git a/libavdevice/decklink_dec.h b/libavdevice/decklink_dec.h
new file mode 100644
index 0000000..6bd9226
--- /dev/null
+++ b/libavdevice/decklink_dec.h
@@ -0,0 +1,32 @@
+/*
+ * 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
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int ff_decklink_read_header(AVFormatContext *avctx);
+int ff_decklink_read_packet(AVFormatContext *avctx, AVPacket *pkt);
+int ff_decklink_read_close(AVFormatContext *avctx);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
diff --git a/libavdevice/decklink_dec_c.c b/libavdevice/decklink_dec_c.c
new file mode 100644
index 0000000..2aea277
--- /dev/null
+++ b/libavdevice/decklink_dec_c.c
@@ -0,0 +1,54 @@
+/*
+ * Blackmagic DeckLink output
+ * Copyright (c) 2014 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 "libavformat/avformat.h"
+#include "libavutil/opt.h"
+
+#include "decklink_common_c.h"
+#include "decklink_dec.h"
+
+#define OFFSET(x) offsetof(struct decklink_cctx, x)
+#define DEC AV_OPT_FLAG_DECODING_PARAM
+
+static const AVOption options[] = {
+ { "list_devices", "list available devices" , OFFSET(list_devices), AV_OPT_TYPE_INT , { .i64 = 0 }, 0, 1, DEC },
+ { "list_formats", "list supported formats" , OFFSET(list_formats), AV_OPT_TYPE_INT , { .i64 = 0 }, 0, 1, DEC },
+ { NULL },
+};
+
+static const AVClass decklink_demuxer_class = {
+ .class_name = "Blackmagic DeckLink demuxer",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+ .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
+};
+
+AVInputFormat ff_decklink_demuxer = {
+ .name = "decklink",
+ .long_name = NULL_IF_CONFIG_SMALL("Blackmagic DeckLink input"),
+ .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE,
+ .priv_class = &decklink_demuxer_class,
+ .priv_data_size = sizeof(struct decklink_cctx),
+ .read_header = ff_decklink_read_header,
+ .read_packet = ff_decklink_read_packet,
+ .read_close = ff_decklink_read_close,
+};
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