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avdevice/decklink_dec: add support for extracting and outputing klv from vanc

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Signed-off-by: Milos Zivkovic <zivkovic@teralogics.com>
Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Milos Zivkovic 2020-06-08 11:56:37 +02:00 committed by Marton Balint
parent 4979afdb85
commit c4e0868243
7 changed files with 135 additions and 2 deletions
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2
configure vendored
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@ -6281,7 +6281,7 @@ enabled avisynth && require_headers "avisynth/avisynth_c.h"
enabled cuda_nvcc && { check_nvcc cuda_nvcc || die "ERROR: failed checking for nvcc."; }
enabled chromaprint && require chromaprint chromaprint.h chromaprint_get_version -lchromaprint
enabled decklink && { require_headers DeckLinkAPI.h &&
{ test_cpp_condition DeckLinkAPIVersion.h "BLACKMAGIC_DECKLINK_API_VERSION >= 0x0a090500" || die "ERROR: Decklink API version must be >= 10.9.5."; } }
{ test_cpp_condition DeckLinkAPIVersion.h "BLACKMAGIC_DECKLINK_API_VERSION >= 0x0a0a0000" || die "ERROR: Decklink API version must be >= 10.10"; } }
enabled frei0r && require_headers "frei0r.h dlfcn.h"
enabled gmp && require gmp gmp.h mpz_export -lgmp
enabled gnutls && require_pkg_config gnutls gnutls gnutls/gnutls.h gnutls_global_init

6
doc/indevs.texi
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@ -398,6 +398,12 @@ are dropped till a frame with timecode is received.
Option @var{timecode_format} must be specified.
Defaults to @option{false}.
@item enable_klv(@emph{bool})
If set to @option{true}, extracts KLV data from VANC and outputs KLV packets.
KLV VANC packets are joined based on MID and PSC fields and aggregated into
one KLV packet.
Defaults to @option{false}.
@end table
@subsection Examples

2
libavdevice/decklink_common.h
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@ -120,12 +120,14 @@ struct decklink_ctx {
unsigned int dropped;
AVStream *audio_st;
AVStream *video_st;
AVStream *klv_st;
AVStream *teletext_st;
uint16_t cdp_sequence_num;
/* Options */
int list_devices;
int list_formats;
int enable_klv;
int64_t teletext_lines;
double preroll;
int duplex_mode;

1
libavdevice/decklink_common_c.h
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@ -40,6 +40,7 @@ struct decklink_cctx {
/* Options */
int list_devices;
int list_formats;
int enable_klv;
int64_t teletext_lines;
double preroll;
int audio_channels;

123
libavdevice/decklink_dec.cpp
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@ -22,6 +22,7 @@
*/
#include <atomic>
#include <vector>
using std::atomic;
/* Include internal.h first to avoid conflict between winsock.h (used by
@ -583,6 +584,109 @@ static int avpacket_queue_get(AVPacketQueue *q, AVPacket *pkt, int block)
return ret;
}
static void handle_klv(AVFormatContext *avctx, decklink_ctx *ctx, IDeckLinkVideoInputFrame *videoFrame, int64_t pts)
{
const uint8_t KLV_DID = 0x44;
const uint8_t KLV_IN_VANC_SDID = 0x04;
struct KLVPacket
{
uint16_t sequence_counter;
std::vector<uint8_t> data;
};
size_t total_size = 0;
std::vector<std::vector<KLVPacket>> klv_packets(256);
IDeckLinkVideoFrameAncillaryPackets *packets = nullptr;
if (videoFrame->QueryInterface(IID_IDeckLinkVideoFrameAncillaryPackets, (void**)&packets) != S_OK)
return;
IDeckLinkAncillaryPacketIterator *it = nullptr;
if (packets->GetPacketIterator(&it) != S_OK) {
packets->Release();
return;
}
IDeckLinkAncillaryPacket *packet = nullptr;
while (it->Next(&packet) == S_OK) {
uint8_t *data = nullptr;
uint32_t size = 0;
if (packet->GetDID() == KLV_DID && packet->GetSDID() == KLV_IN_VANC_SDID) {
av_log(avctx, AV_LOG_DEBUG, "Found KLV VANC packet on line: %d\n", packet->GetLineNumber());
if (packet->GetBytes(bmdAncillaryPacketFormatUInt8, (const void**) &data, &size) == S_OK) {
// MID and PSC
if (size > 3) {
uint8_t mid = data[0];
uint16_t psc = data[1] << 8 | data[2];
av_log(avctx, AV_LOG_DEBUG, "KLV with MID: %d and PSC: %d\n", mid, psc);
auto& list = klv_packets[mid];
uint16_t expected_psc = list.size() + 1;
if (psc == expected_psc) {
uint32_t data_len = size - 3;
total_size += data_len;
KLVPacket packet{ psc };
packet.data.resize(data_len);
memcpy(packet.data.data(), data + 3, data_len);
list.push_back(std::move(packet));
} else {
av_log(avctx, AV_LOG_WARNING, "Out of order PSC: %d for MID: %d\n", psc, mid);
if (!list.empty()) {
for (auto& klv : list)
total_size -= klv.data.size();
list.clear();
}
}
}
}
}
packet->Release();
}
it->Release();
packets->Release();
if (total_size > 0) {
std::vector<uint8_t> klv;
klv.reserve(total_size);
for (size_t i = 0; i < klv_packets.size(); ++i) {
auto& list = klv_packets[i];
if (list.empty())
continue;
av_log(avctx, AV_LOG_DEBUG, "Joining MID: %d\n", (int)i);
for (auto& packet : list)
klv.insert(klv.end(), packet.data.begin(), packet.data.end());
}
AVPacket klv_packet;
av_init_packet(&klv_packet);
klv_packet.pts = pts;
klv_packet.dts = pts;
klv_packet.flags |= AV_PKT_FLAG_KEY;
klv_packet.stream_index = ctx->klv_st->index;
klv_packet.data = klv.data();
klv_packet.size = klv.size();
if (avpacket_queue_put(&ctx->queue, &klv_packet) < 0) {
++ctx->dropped;
}
}
}
class decklink_input_callback : public IDeckLinkInputCallback
{
public:
@ -821,6 +925,10 @@ HRESULT decklink_input_callback::VideoInputFrameArrived(
uint8_t txt_buf0[3531]; // 35 * 46 bytes decoded teletext lines + 1 byte data_identifier + 1920 bytes OP47 decode buffer
uint8_t *txt_buf = txt_buf0;
if (ctx->enable_klv) {
handle_klv(avctx, ctx, videoFrame, pkt.pts);
}
if (videoFrame->GetAncillaryData(&vanc) == S_OK) {
int i;
int64_t line_mask = 1;
@ -1012,6 +1120,7 @@ av_cold int ff_decklink_read_header(AVFormatContext *avctx)
return AVERROR(ENOMEM);
ctx->list_devices = cctx->list_devices;
ctx->list_formats = cctx->list_formats;
ctx->enable_klv = cctx->enable_klv;
ctx->teletext_lines = cctx->teletext_lines;
ctx->preroll = cctx->preroll;
ctx->duplex_mode = cctx->duplex_mode;
@ -1202,6 +1311,20 @@ av_cold int ff_decklink_read_header(AVFormatContext *avctx)
ctx->video_st=st;
if (ctx->enable_klv) {
st = avformat_new_stream(avctx, NULL);
if (!st) {
ret = AVERROR(ENOMEM);
goto error;
}
st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
st->time_base.den = ctx->bmd_tb_den;
st->time_base.num = ctx->bmd_tb_num;
st->codecpar->codec_id = AV_CODEC_ID_SMPTE_KLV;
avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
ctx->klv_st = st;
}
if (ctx->teletext_lines) {
st = avformat_new_stream(avctx, NULL);
if (!st) {

1
libavdevice/decklink_dec_c.c
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@ -39,6 +39,7 @@ static const AVOption options[] = {
{ "argb", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 32 }, 0, 0, DEC, "raw_format"},
{ "bgra", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MKBETAG('B','G','R','A') }, 0, 0, DEC, "raw_format"},
{ "rgb10", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MKBETAG('r','2','1','0') }, 0, 0, DEC, "raw_format"},
{ "enable_klv", "output klv if present in vanc", OFFSET(enable_klv), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, DEC },
{ "teletext_lines", "teletext lines bitmask", OFFSET(teletext_lines), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, 0x7ffffffffLL, DEC, "teletext_lines"},
{ "standard", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0x7fff9fffeLL}, 0, 0, DEC, "teletext_lines"},
{ "all", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0x7ffffffffLL}, 0, 0, DEC, "teletext_lines"},

2
libavdevice/version.h
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@ -29,7 +29,7 @@
#define LIBAVDEVICE_VERSION_MAJOR 58
#define LIBAVDEVICE_VERSION_MINOR 11
#define LIBAVDEVICE_VERSION_MICRO 100
#define LIBAVDEVICE_VERSION_MICRO 101
#define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
LIBAVDEVICE_VERSION_MINOR, \