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avdevice: add decklink input support 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Deti Fliegl 2014-09-22 02:46:03 +02:00 committed by Michael Niedermayer
parent a5e040ee3c
commit bac6cfcb3a
8 changed files with 678 additions and 3 deletions
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1
MAINTAINERS
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@ -309,6 +309,7 @@ libavdevice
avfoundation.m Thilo Borgmann
decklink* Deti Fliegl
dshow.c Roger Pack (CC rogerdpack@gmail.com)
fbdev_enc.c Lukasz Marek
gdigrab.c Roger Pack (CC rogerdpack@gmail.com)

4
configure vendored
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@ -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"

54
doc/indevs.texi
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@ -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
@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
@command{-list_formats 1}. Audio sample rate is always 48 kHz and the number
of channels currently is limited to 2 (stereo).
@subsection Options
@table @option
@item list_devices
If set to @option{true}, print a list of devices and exit.
Defaults to @option{false}.
@item list_formats
If set to @option{true}, print a list of supported formats and exit.
Defaults to @option{false}.
@end table
@subsection Examples
@itemize
@item
List input devices:
@example
ffmpeg -f decklink -list_devices 1 -i dummy
@end example
@item
List supported formats:
@example
ffmpeg -f decklink -list_formats 1 -i 'Intensity Pro'
@end example
@item
Capture video clip at 1080i50 (format 11):
@example
ffmpeg -f decklink -i 'Intensity Pro@@11' -acodec copy -vcodec copy output.avi
@end example
@end itemize
@c man end INPUT DEVICES

3
libavdevice/Makefile
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@ -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

2
libavdevice/alldevices.c
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@ -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);

531
libavdevice/decklink_dec.cpp Normal file
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@ -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" */

32
libavdevice/decklink_dec.h Normal file
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@ -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

54
libavdevice/decklink_dec_c.c Normal file
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@ -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,
};