[FFmpeg-devel] [PATCH 2/5] libavdevice/decklink: Add support for EIA-708 output over SDI
Devin Heitmueller
dheitmueller at ltnglobal.com
Fri Sep 7 22:40:25 EEST 2018
Hook in libklvanc and use it for output of EIA-708 captions over
SDI. The bulk of this patch is just general support for ancillary
data for the Decklink SDI module - the real work for construction
of the EIA-708 CDP and VANC line construction is done by libklvanc.
Libklvanc can be found at: https://github.com/stoth68000/libklvanc
Updated to reflect feedback from Marton Balint <cus at passwd.hu>,
Carl Eugen Hoyos <ceffmpeg at gmail.com>, Aaron Levinson
<alevinsn_dev at levland.net>, and Moritz Barsnick <barsnick at gmx.net>
Signed-off-by: Devin Heitmueller <dheitmueller at ltnglobal.com>
---
configure | 4 +
libavdevice/decklink_common.cpp | 16 +++-
libavdevice/decklink_common.h | 10 +++
libavdevice/decklink_enc.cpp | 179 ++++++++++++++++++++++++++++++++++++++--
4 files changed, 198 insertions(+), 11 deletions(-)
diff --git a/configure b/configure
index 0d6ee0abfc..21d5c619cc 100755
--- a/configure
+++ b/configure
@@ -239,6 +239,7 @@ External library support:
--enable-libiec61883 enable iec61883 via libiec61883 [no]
--enable-libilbc enable iLBC de/encoding via libilbc [no]
--enable-libjack enable JACK audio sound server [no]
+ --enable-libklvanc enable Kernel Labs VANC processing [no]
--enable-libkvazaar enable HEVC encoding via libkvazaar [no]
--enable-liblensfun enable lensfun lens correction [no]
--enable-libmodplug enable ModPlug via libmodplug [no]
@@ -1720,6 +1721,7 @@ EXTERNAL_LIBRARY_LIST="
libiec61883
libilbc
libjack
+ libklvanc
libkvazaar
libmodplug
libmp3lame
@@ -3233,6 +3235,7 @@ decklink_deps_any="libdl LoadLibrary"
decklink_indev_deps="decklink threads"
decklink_indev_extralibs="-lstdc++"
decklink_outdev_deps="decklink threads"
+decklink_outdev_suggest="libklvanc"
decklink_outdev_extralibs="-lstdc++"
libndi_newtek_indev_deps="libndi_newtek"
libndi_newtek_indev_extralibs="-lndi"
@@ -6068,6 +6071,7 @@ enabled libgsm && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
check_lib libgsm "${gsm_hdr}" gsm_create -lgsm && break;
done || die "ERROR: libgsm not found"; }
enabled libilbc && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc $pthreads_extralibs
+enabled libklvanc && require libklvanc libklvanc/vanc.h klvanc_context_create -lklvanc
enabled libkvazaar && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
enabled liblensfun && require_pkg_config liblensfun lensfun lensfun.h lf_db_new
# While it may appear that require is being used as a pkg-config
diff --git a/libavdevice/decklink_common.cpp b/libavdevice/decklink_common.cpp
index aab9d85b94..503417bb35 100644
--- a/libavdevice/decklink_common.cpp
+++ b/libavdevice/decklink_common.cpp
@@ -239,10 +239,18 @@ int ff_decklink_set_format(AVFormatContext *avctx,
&support, NULL) != S_OK)
return -1;
} else {
- if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,
- bmdVideoOutputFlagDefault,
- &support, NULL) != S_OK)
- return -1;
+ if (!ctx->supports_vanc || ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,
+ bmdVideoOutputVANC,
+ &support, NULL) != S_OK) {
+ /* Try without VANC enabled */
+ if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, ctx->raw_format,
+ bmdVideoOutputFlagDefault,
+ &support, NULL) != S_OK) {
+ return -1;
+ }
+ ctx->supports_vanc = 0;
+ }
+
}
if (support == bmdDisplayModeSupported)
return 0;
diff --git a/libavdevice/decklink_common.h b/libavdevice/decklink_common.h
index 96b001c2d8..128144f50d 100644
--- a/libavdevice/decklink_common.h
+++ b/libavdevice/decklink_common.h
@@ -27,6 +27,9 @@
#include "libavutil/thread.h"
#include "decklink_common_c.h"
+#if CONFIG_LIBKLVANC
+#include "libklvanc/vanc.h"
+#endif
#ifdef _WIN32
#define DECKLINK_BOOL BOOL
@@ -97,6 +100,7 @@ struct decklink_ctx {
int bmd_width;
int bmd_height;
int bmd_field_dominance;
+ int supports_vanc;
/* Capture buffer queue */
AVPacketQueue queue;
@@ -114,6 +118,7 @@ struct decklink_ctx {
AVStream *audio_st;
AVStream *video_st;
AVStream *teletext_st;
+ uint16_t cdp_sequence_num;
/* Options */
int list_devices;
@@ -124,6 +129,7 @@ struct decklink_ctx {
DecklinkPtsSource audio_pts_source;
DecklinkPtsSource video_pts_source;
int draw_bars;
+ BMDPixelFormat raw_format;
int frames_preroll;
int frames_buffer;
@@ -133,6 +139,10 @@ struct decklink_ctx {
int frames_buffer_available_spots;
int autodetect;
+#if CONFIG_LIBKLVANC
+ struct klvanc_context_s *vanc_ctx;
+#endif
+
int channels;
int audio_depth;
};
diff --git a/libavdevice/decklink_enc.cpp b/libavdevice/decklink_enc.cpp
index ee4c962add..6f1941b29f 100644
--- a/libavdevice/decklink_enc.cpp
+++ b/libavdevice/decklink_enc.cpp
@@ -38,17 +38,20 @@ extern "C" {
#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), _height(height), _width(width), _refs(1) { }
+ _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), _height(height), _width(width), _refs(1) { }
-
+ _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)
@@ -87,8 +90,24 @@ public:
}
virtual HRESULT STDMETHODCALLTYPE GetTimecode (BMDTimecodeFormat format, IDeckLinkTimecode **timecode) { return S_FALSE; }
- virtual HRESULT STDMETHODCALLTYPE GetAncillaryData(IDeckLinkVideoFrameAncillary **ancillary) { 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)
@@ -97,6 +116,8 @@ public:
if (!ret) {
av_frame_free(&_avframe);
av_packet_free(&_avpacket);
+ if (_ancillary)
+ _ancillary->Release();
delete this;
}
return ret;
@@ -106,6 +127,7 @@ public:
AVFrame *_avframe;
AVPacket *_avpacket;
AVCodecID _codec_id;
+ IDeckLinkVideoFrameAncillary *_ancillary;
int _height;
int _width;
@@ -156,10 +178,13 @@ static int decklink_setup_video(AVFormatContext *avctx, AVStream *st)
" 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) {
@@ -173,7 +198,7 @@ static int decklink_setup_video(AVFormatContext *avctx, AVStream *st)
return -1;
}
if (ctx->dlo->EnableVideoOutput(ctx->bmd_mode,
- bmdVideoOutputFlagDefault) != S_OK) {
+ ctx->supports_vanc ? bmdVideoOutputVANC : bmdVideoOutputFlagDefault) != S_OK) {
av_log(avctx, AV_LOG_ERROR, "Could not enable video output!\n");
return -1;
}
@@ -267,11 +292,139 @@ av_cold int ff_decklink_write_trailer(AVFormatContext *avctx)
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_LIBKLVANC
+static 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;
+ int size, 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;
@@ -306,6 +459,11 @@ static int decklink_write_video_packet(AVFormatContext *avctx, AVPacket *pkt)
}
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) {
@@ -396,6 +554,13 @@ av_cold int ff_decklink_write_header(AVFormatContext *avctx)
ctx->list_formats = cctx->list_formats;
ctx->preroll = cctx->preroll;
cctx->ctx = ctx;
+#if CONFIG_LIBKLVANC
+ if (klvanc_context_create(&ctx->vanc_ctx) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot create VANC library context\n");
+ return AVERROR(ENOMEM);
+ }
+ ctx->supports_vanc = 1;
+#endif
/* List available devices and exit. */
if (ctx->list_devices) {
--
2.13.2
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