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decklink_dec.cpp
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/*
* Blackmagic DeckLink input
* Copyright (c) 2013-2014 Luca Barbato, Deti Fliegl
* Copyright (c) 2014 Rafaël Carré
* Copyright (c) 2017 Akamai Technologies, Inc.
*
* 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 <atomic>
using std::atomic;
/* Include internal.h first to avoid conflict between winsock.h (used by
* DeckLink headers) and winsock2.h (used by libavformat) in MSVC++ builds */
extern "C" {
#include "libavformat/internal.h"
}
#include <DeckLinkAPI.h>
extern "C" {
#include "config.h"
#include "libavformat/avformat.h"
#include "libavutil/avassert.h"
#include "libavutil/avutil.h"
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/time.h"
#include "libavutil/mathematics.h"
#include "libavutil/reverse.h"
#include "avdevice.h"
#if CONFIG_LIBZVBI
#include <libzvbi.h>
#endif
}
#include "decklink_common.h"
#include "decklink_dec.h"
#define MAX_WIDTH_VANC 1920
const BMDDisplayMode AUTODETECT_DEFAULT_MODE = bmdModeNTSC;
typedef struct VANCLineNumber {
BMDDisplayMode mode;
int vanc_start;
int field0_vanc_end;
int field1_vanc_start;
int vanc_end;
} VANCLineNumber;
/* These VANC line numbers need not be very accurate. In any case
* GetBufferForVerticalBlankingLine() will return an error when invalid
* ancillary line number was requested. We just need to make sure that the
* entire VANC region is covered, while making sure we don't decode VANC of
* another source during switching*/
static VANCLineNumber vanc_line_numbers[] = {
/* SD Modes */
{bmdModeNTSC, 11, 19, 274, 282},
{bmdModeNTSC2398, 11, 19, 274, 282},
{bmdModePAL, 7, 22, 320, 335},
{bmdModeNTSCp, 11, -1, -1, 39},
{bmdModePALp, 7, -1, -1, 45},
/* HD 1080 Modes */
{bmdModeHD1080p2398, 8, -1, -1, 42},
{bmdModeHD1080p24, 8, -1, -1, 42},
{bmdModeHD1080p25, 8, -1, -1, 42},
{bmdModeHD1080p2997, 8, -1, -1, 42},
{bmdModeHD1080p30, 8, -1, -1, 42},
{bmdModeHD1080i50, 8, 20, 570, 585},
{bmdModeHD1080i5994, 8, 20, 570, 585},
{bmdModeHD1080i6000, 8, 20, 570, 585},
{bmdModeHD1080p50, 8, -1, -1, 42},
{bmdModeHD1080p5994, 8, -1, -1, 42},
{bmdModeHD1080p6000, 8, -1, -1, 42},
/* HD 720 Modes */
{bmdModeHD720p50, 8, -1, -1, 26},
{bmdModeHD720p5994, 8, -1, -1, 26},
{bmdModeHD720p60, 8, -1, -1, 26},
/* For all other modes, for which we don't support VANC */
{bmdModeUnknown, 0, -1, -1, -1}
};
class decklink_allocator : public IDeckLinkMemoryAllocator
{
public:
decklink_allocator(): _refs(1) { }
virtual ~decklink_allocator() { }
// IDeckLinkMemoryAllocator methods
virtual HRESULT STDMETHODCALLTYPE AllocateBuffer(unsigned int bufferSize, void* *allocatedBuffer)
{
void *buf = av_malloc(bufferSize + AV_INPUT_BUFFER_PADDING_SIZE);
if (!buf)
return E_OUTOFMEMORY;
*allocatedBuffer = buf;
return S_OK;
}
virtual HRESULT STDMETHODCALLTYPE ReleaseBuffer(void* buffer)
{
av_free(buffer);
return S_OK;
}
virtual HRESULT STDMETHODCALLTYPE Commit() { return S_OK; }
virtual HRESULT STDMETHODCALLTYPE Decommit() { return S_OK; }
// IUnknown methods
virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
virtual ULONG STDMETHODCALLTYPE AddRef(void) { return ++_refs; }
virtual ULONG STDMETHODCALLTYPE Release(void)
{
int ret = --_refs;
if (!ret)
delete this;
return ret;
}
private:
std::atomic<int> _refs;
};
extern "C" {
static void decklink_object_free(void *opaque, uint8_t *data)
{
IUnknown *obj = (class IUnknown *)opaque;
obj->Release();
}
}
static int get_vanc_line_idx(BMDDisplayMode mode)
{
unsigned int i;
for (i = 0; i < FF_ARRAY_ELEMS(vanc_line_numbers); i++) {
if (mode == vanc_line_numbers[i].mode)
return i;
}
/* Return the VANC idx for Unknown mode */
return i - 1;
}
static inline void clear_parity_bits(uint16_t *buf, int len) {
int i;
for (i = 0; i < len; i++)
buf[i] &= 0xff;
}
static int check_vanc_parity_checksum(uint16_t *buf, int len, uint16_t checksum) {
int i;
uint16_t vanc_sum = 0;
for (i = 3; i < len - 1; i++) {
uint16_t v = buf[i];
int np = v >> 8;
int p = av_parity(v & 0xff);
if ((!!p ^ !!(v & 0x100)) || (np != 1 && np != 2)) {
// Parity check failed
return -1;
}
vanc_sum += v;
}
vanc_sum &= 0x1ff;
vanc_sum |= ((~vanc_sum & 0x100) << 1);
if (checksum != vanc_sum) {
// Checksum verification failed
return -1;
}
return 0;
}
/* The 10-bit VANC data is packed in V210, we only need the luma component. */
static void extract_luma_from_v210(uint16_t *dst, const uint8_t *src, int width)
{
int i;
for (i = 0; i < width / 3; i++) {
*dst++ = (src[1] >> 2) + ((src[2] & 15) << 6);
*dst++ = src[4] + ((src[5] & 3) << 8);
*dst++ = (src[6] >> 4) + ((src[7] & 63) << 4);
src += 8;
}
}
static void unpack_v210(uint16_t *dst, const uint8_t *src, int width)
{
int i;
for (i = 0; i < width * 2 / 3; i++) {
*dst++ = src[0] + ((src[1] & 3) << 8);
*dst++ = (src[1] >> 2) + ((src[2] & 15) << 6);
*dst++ = (src[2] >> 4) + ((src[3] & 63) << 4);
src += 4;
}
}
static uint8_t calc_parity_and_line_offset(int line)
{
uint8_t ret = (line < 313) << 5;
if (line >= 7 && line <= 22)
ret += line;
if (line >= 320 && line <= 335)
ret += (line - 313);
return ret;
}
static void fill_data_unit_head(int line, uint8_t *tgt)
{
tgt[0] = 0x02; // data_unit_id
tgt[1] = 0x2c; // data_unit_length
tgt[2] = calc_parity_and_line_offset(line); // field_parity, line_offset
tgt[3] = 0xe4; // framing code
}
#if CONFIG_LIBZVBI
static uint8_t* teletext_data_unit_from_vbi_data(int line, uint8_t *src, uint8_t *tgt, vbi_pixfmt fmt)
{
vbi_bit_slicer slicer;
vbi_bit_slicer_init(&slicer, 720, 13500000, 6937500, 6937500, 0x00aaaae4, 0xffff, 18, 6, 42 * 8, VBI_MODULATION_NRZ_MSB, fmt);
if (vbi_bit_slice(&slicer, src, tgt + 4) == FALSE)
return tgt;
fill_data_unit_head(line, tgt);
return tgt + 46;
}
static uint8_t* teletext_data_unit_from_vbi_data_10bit(int line, uint8_t *src, uint8_t *tgt)
{
uint8_t y[720];
uint8_t *py = y;
uint8_t *pend = y + 720;
/* The 10-bit VBI data is packed in V210, but libzvbi only supports 8-bit,
* so we extract the 8 MSBs of the luma component, that is enough for
* teletext bit slicing. */
while (py < pend) {
*py++ = (src[1] >> 4) + ((src[2] & 15) << 4);
*py++ = (src[4] >> 2) + ((src[5] & 3 ) << 6);
*py++ = (src[6] >> 6) + ((src[7] & 63) << 2);
src += 8;
}
return teletext_data_unit_from_vbi_data(line, y, tgt, VBI_PIXFMT_YUV420);
}
#endif
static uint8_t* teletext_data_unit_from_op47_vbi_packet(int line, uint16_t *py, uint8_t *tgt)
{
int i;
if (py[0] != 0x255 || py[1] != 0x255 || py[2] != 0x227)
return tgt;
fill_data_unit_head(line, tgt);
py += 3;
tgt += 4;
for (i = 0; i < 42; i++)
*tgt++ = ff_reverse[py[i] & 255];
return tgt;
}
static int linemask_matches(int line, int64_t mask)
{
int shift = -1;
if (line >= 6 && line <= 22)
shift = line - 6;
if (line >= 318 && line <= 335)
shift = line - 318 + 17;
return shift >= 0 && ((1ULL << shift) & mask);
}
static uint8_t* teletext_data_unit_from_op47_data(uint16_t *py, uint16_t *pend, uint8_t *tgt, int64_t wanted_lines)
{
if (py < pend - 9) {
if (py[0] == 0x151 && py[1] == 0x115 && py[3] == 0x102) { // identifier, identifier, format code for WST teletext
uint16_t *descriptors = py + 4;
int i;
py += 9;
for (i = 0; i < 5 && py < pend - 45; i++, py += 45) {
int line = (descriptors[i] & 31) + (!(descriptors[i] & 128)) * 313;
if (line && linemask_matches(line, wanted_lines))
tgt = teletext_data_unit_from_op47_vbi_packet(line, py, tgt);
}
}
}
return tgt;
}
static uint8_t* teletext_data_unit_from_ancillary_packet(uint16_t *py, uint16_t *pend, uint8_t *tgt, int64_t wanted_lines, int allow_multipacket)
{
uint16_t did = py[0]; // data id
uint16_t sdid = py[1]; // secondary data id
uint16_t dc = py[2] & 255; // data count
py += 3;
pend = FFMIN(pend, py + dc);
if (did == 0x143 && sdid == 0x102) { // subtitle distribution packet
tgt = teletext_data_unit_from_op47_data(py, pend, tgt, wanted_lines);
} else if (allow_multipacket && did == 0x143 && sdid == 0x203) { // VANC multipacket
py += 2; // priority, line/field
while (py < pend - 3) {
tgt = teletext_data_unit_from_ancillary_packet(py, pend, tgt, wanted_lines, 0);
py += 4 + (py[2] & 255); // ndid, nsdid, ndc, line/field
}
}
return tgt;
}
static uint8_t *vanc_to_cc(AVFormatContext *avctx, uint16_t *buf, size_t words,
unsigned &cc_count)
{
size_t i, len = (buf[5] & 0xff) + 6 + 1;
uint8_t cdp_sum, rate;
uint16_t hdr, ftr;
uint8_t *cc;
uint16_t *cdp = &buf[6]; // CDP follows
if (cdp[0] != 0x96 || cdp[1] != 0x69) {
av_log(avctx, AV_LOG_WARNING, "Invalid CDP header 0x%.2x 0x%.2x\n", cdp[0], cdp[1]);
return NULL;
}
len -= 7; // remove VANC header and checksum
if (cdp[2] != len) {
av_log(avctx, AV_LOG_WARNING, "CDP len %d != %zu\n", cdp[2], len);
return NULL;
}
cdp_sum = 0;
for (i = 0; i < len - 1; i++)
cdp_sum += cdp[i];
cdp_sum = cdp_sum ? 256 - cdp_sum : 0;
if (cdp[len - 1] != cdp_sum) {
av_log(avctx, AV_LOG_WARNING, "CDP checksum invalid 0x%.4x != 0x%.4x\n", cdp_sum, cdp[len-1]);
return NULL;
}
rate = cdp[3];
if (!(rate & 0x0f)) {
av_log(avctx, AV_LOG_WARNING, "CDP frame rate invalid (0x%.2x)\n", rate);
return NULL;
}
rate >>= 4;
if (rate > 8) {
av_log(avctx, AV_LOG_WARNING, "CDP frame rate invalid (0x%.2x)\n", rate);
return NULL;
}
if (!(cdp[4] & 0x43)) /* ccdata_present | caption_service_active | reserved */ {
av_log(avctx, AV_LOG_WARNING, "CDP flags invalid (0x%.2x)\n", cdp[4]);
return NULL;
}
hdr = (cdp[5] << 8) | cdp[6];
if (cdp[7] != 0x72) /* ccdata_id */ {
av_log(avctx, AV_LOG_WARNING, "Invalid ccdata_id 0x%.2x\n", cdp[7]);
return NULL;
}
cc_count = cdp[8];
if (!(cc_count & 0xe0)) {
av_log(avctx, AV_LOG_WARNING, "Invalid cc_count 0x%.2x\n", cc_count);
return NULL;
}
cc_count &= 0x1f;
if ((len - 13) < cc_count * 3) {
av_log(avctx, AV_LOG_WARNING, "Invalid cc_count %d (> %zu)\n", cc_count * 3, len - 13);
return NULL;
}
if (cdp[len - 4] != 0x74) /* footer id */ {
av_log(avctx, AV_LOG_WARNING, "Invalid footer id 0x%.2x\n", cdp[len-4]);
return NULL;
}
ftr = (cdp[len - 3] << 8) | cdp[len - 2];
if (ftr != hdr) {
av_log(avctx, AV_LOG_WARNING, "Header 0x%.4x != Footer 0x%.4x\n", hdr, ftr);
return NULL;
}
cc = (uint8_t *)av_malloc(cc_count * 3);
if (cc == NULL) {
av_log(avctx, AV_LOG_WARNING, "CC - av_malloc failed for cc_count = %d\n", cc_count);
return NULL;
}
for (size_t i = 0; i < cc_count; i++) {
cc[3*i + 0] = cdp[9 + 3*i+0] /* & 3 */;
cc[3*i + 1] = cdp[9 + 3*i+1];
cc[3*i + 2] = cdp[9 + 3*i+2];
}
cc_count *= 3;
return cc;
}
static uint8_t *get_metadata(AVFormatContext *avctx, uint16_t *buf, size_t width,
uint8_t *tgt, size_t tgt_size, AVPacket *pkt)
{
decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
uint16_t *max_buf = buf + width;
while (buf < max_buf - 6) {
int len;
uint16_t did = buf[3] & 0xFF; // data id
uint16_t sdid = buf[4] & 0xFF; // secondary data id
/* Check for VANC header */
if (buf[0] != 0 || buf[1] != 0x3ff || buf[2] != 0x3ff) {
return tgt;
}
len = (buf[5] & 0xff) + 6 + 1;
if (len > max_buf - buf) {
av_log(avctx, AV_LOG_WARNING, "Data Count (%d) > data left (%zu)\n",
len, max_buf - buf);
return tgt;
}
if (did == 0x43 && (sdid == 0x02 || sdid == 0x03) && cctx->teletext_lines &&
width == 1920 && tgt_size >= 1920) {
if (check_vanc_parity_checksum(buf, len, buf[len - 1]) < 0) {
av_log(avctx, AV_LOG_WARNING, "VANC parity or checksum incorrect\n");
goto skip_packet;
}
tgt = teletext_data_unit_from_ancillary_packet(buf + 3, buf + len, tgt, cctx->teletext_lines, 1);
} else if (did == 0x61 && sdid == 0x01) {
unsigned int data_len;
uint8_t *data;
if (check_vanc_parity_checksum(buf, len, buf[len - 1]) < 0) {
av_log(avctx, AV_LOG_WARNING, "VANC parity or checksum incorrect\n");
goto skip_packet;
}
clear_parity_bits(buf, len);
data = vanc_to_cc(avctx, buf, width, data_len);
if (data) {
if (av_packet_add_side_data(pkt, AV_PKT_DATA_A53_CC, data, data_len) < 0)
av_free(data);
}
} else {
av_log(avctx, AV_LOG_DEBUG, "Unknown meta data DID = 0x%.2x SDID = 0x%.2x\n",
did, sdid);
}
skip_packet:
buf += len;
}
return tgt;
}
static void avpacket_queue_init(AVFormatContext *avctx, AVPacketQueue *q)
{
struct decklink_cctx *ctx = (struct decklink_cctx *)avctx->priv_data;
memset(q, 0, sizeof(AVPacketQueue));
pthread_mutex_init(&q->mutex, NULL);
pthread_cond_init(&q->cond, NULL);
q->avctx = avctx;
q->max_q_size = ctx->queue_size;
}
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_packet_unref(&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 > maximum queue size
if (avpacket_queue_size(q) > (uint64_t)q->max_q_size) {
av_packet_unref(pkt);
av_log(q->avctx, AV_LOG_WARNING, "Decklink input buffer overrun!\n");
return -1;
}
/* ensure the packet is reference counted */
if (av_packet_make_refcounted(pkt) < 0) {
av_packet_unref(pkt);
return -1;
}
pkt1 = (AVPacketList *)av_malloc(sizeof(AVPacketList));
if (!pkt1) {
av_packet_unref(pkt);
return -1;
}
av_packet_move_ref(&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:
std::atomic<int> _refs;
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) : _refs(1)
{
avctx = _avctx;
decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
ctx = (struct decklink_ctx *)cctx->ctx;
no_video = 0;
initial_audio_pts = initial_video_pts = AV_NOPTS_VALUE;
}
decklink_input_callback::~decklink_input_callback()
{
}
ULONG decklink_input_callback::AddRef(void)
{
return ++_refs;
}
ULONG decklink_input_callback::Release(void)
{
int ret = --_refs;
if (!ret)
delete this;
return ret;
}
static int64_t get_pkt_pts(IDeckLinkVideoInputFrame *videoFrame,
IDeckLinkAudioInputPacket *audioFrame,
int64_t wallclock,
int64_t abs_wallclock,
DecklinkPtsSource pts_src,
AVRational time_base, int64_t *initial_pts,
int copyts)
{
int64_t pts = AV_NOPTS_VALUE;
BMDTimeValue bmd_pts;
BMDTimeValue bmd_duration;
HRESULT res = E_INVALIDARG;
switch (pts_src) {
case PTS_SRC_AUDIO:
if (audioFrame)
res = audioFrame->GetPacketTime(&bmd_pts, time_base.den);
break;
case PTS_SRC_VIDEO:
if (videoFrame)
res = videoFrame->GetStreamTime(&bmd_pts, &bmd_duration, time_base.den);
break;
case PTS_SRC_REFERENCE:
if (videoFrame)
res = videoFrame->GetHardwareReferenceTimestamp(time_base.den, &bmd_pts, &bmd_duration);
break;
case PTS_SRC_WALLCLOCK:
/* fall through */
case PTS_SRC_ABS_WALLCLOCK:
{
/* MSVC does not support compound literals like AV_TIME_BASE_Q
* in C++ code (compiler error C4576) */
AVRational timebase;
timebase.num = 1;
timebase.den = AV_TIME_BASE;
if (pts_src == PTS_SRC_WALLCLOCK)
pts = av_rescale_q(wallclock, timebase, time_base);
else
pts = av_rescale_q(abs_wallclock, timebase, time_base);
break;
}
}
if (res == S_OK)
pts = bmd_pts / time_base.num;
if (!copyts) {
if (pts != AV_NOPTS_VALUE && *initial_pts == AV_NOPTS_VALUE)
*initial_pts = pts;
if (*initial_pts != AV_NOPTS_VALUE)
pts -= *initial_pts;
}
return pts;
}
HRESULT decklink_input_callback::VideoInputFrameArrived(
IDeckLinkVideoInputFrame *videoFrame, IDeckLinkAudioInputPacket *audioFrame)
{
void *frameBytes;
void *audioFrameBytes;
BMDTimeValue frameTime;
BMDTimeValue frameDuration;
int64_t wallclock = 0, abs_wallclock = 0;
struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
if (ctx->autodetect) {
if (videoFrame && !(videoFrame->GetFlags() & bmdFrameHasNoInputSource) &&
ctx->bmd_mode == bmdModeUnknown)
{
ctx->bmd_mode = AUTODETECT_DEFAULT_MODE;
}
return S_OK;
}
ctx->frameCount++;
if (ctx->audio_pts_source == PTS_SRC_WALLCLOCK || ctx->video_pts_source == PTS_SRC_WALLCLOCK)
wallclock = av_gettime_relative();
if (ctx->audio_pts_source == PTS_SRC_ABS_WALLCLOCK || ctx->video_pts_source == PTS_SRC_ABS_WALLCLOCK)
abs_wallclock = av_gettime();
// Handle Video Frame
if (videoFrame) {
AVPacket pkt;
av_init_packet(&pkt);
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) {
if (ctx->draw_bars && videoFrame->GetPixelFormat() == bmdFormat8BitYUV) {
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;
// Handle Timecode (if requested)
if (ctx->tc_format) {
IDeckLinkTimecode *timecode;
if (videoFrame->GetTimecode(ctx->tc_format, &timecode) == S_OK) {
const char *tc = NULL;
DECKLINK_STR decklink_tc;
if (timecode->GetString(&decklink_tc) == S_OK) {
tc = DECKLINK_STRDUP(decklink_tc);
DECKLINK_FREE(decklink_tc);
}
timecode->Release();
if (tc) {
AVDictionary* metadata_dict = NULL;
int metadata_len;
uint8_t* packed_metadata;
if (av_dict_set(&metadata_dict, "timecode", tc, AV_DICT_DONT_STRDUP_VAL) >= 0) {
packed_metadata = av_packet_pack_dictionary(metadata_dict, &metadata_len);
av_dict_free(&metadata_dict);
if (packed_metadata) {
if (av_packet_add_side_data(&pkt, AV_PKT_DATA_STRINGS_METADATA, packed_metadata, metadata_len) < 0)
av_freep(&packed_metadata);
}
}
}
} else {
av_log(avctx, AV_LOG_DEBUG, "Unable to find timecode.\n");
}
}
}
pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, abs_wallclock, ctx->video_pts_source, ctx->video_st->time_base, &initial_video_pts, cctx->copyts);
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);
if (!no_video) {
IDeckLinkVideoFrameAncillary *vanc;
AVPacket txt_pkt;
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 (videoFrame->GetAncillaryData(&vanc) == S_OK) {
int i;
int64_t line_mask = 1;
BMDPixelFormat vanc_format = vanc->GetPixelFormat();
txt_buf[0] = 0x10; // data_identifier - EBU_data
txt_buf++;
#if CONFIG_LIBZVBI
if (ctx->bmd_mode == bmdModePAL && ctx->teletext_lines &&
(vanc_format == bmdFormat8BitYUV || vanc_format == bmdFormat10BitYUV)) {
av_assert0(videoFrame->GetWidth() == 720);
for (i = 6; i < 336; i++, line_mask <<= 1) {
uint8_t *buf;
if ((ctx->teletext_lines & line_mask) && vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) {
if (vanc_format == bmdFormat8BitYUV)
txt_buf = teletext_data_unit_from_vbi_data(i, buf, txt_buf, VBI_PIXFMT_UYVY);
else
txt_buf = teletext_data_unit_from_vbi_data_10bit(i, buf, txt_buf);
}
if (i == 22)
i = 317;
}
}
#endif
if (vanc_format == bmdFormat10BitYUV && videoFrame->GetWidth() <= MAX_WIDTH_VANC) {
int idx = get_vanc_line_idx(ctx->bmd_mode);
for (i = vanc_line_numbers[idx].vanc_start; i <= vanc_line_numbers[idx].vanc_end; i++) {
uint8_t *buf;
if (vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) {
uint16_t vanc[MAX_WIDTH_VANC];
size_t vanc_size = videoFrame->GetWidth();
if (ctx->bmd_mode == bmdModeNTSC && videoFrame->GetWidth() * 2 <= MAX_WIDTH_VANC) {
vanc_size = vanc_size * 2;
unpack_v210(vanc, buf, videoFrame->GetWidth());
} else {
extract_luma_from_v210(vanc, buf, videoFrame->GetWidth());
}
txt_buf = get_metadata(avctx, vanc, vanc_size,
txt_buf, sizeof(txt_buf0) - (txt_buf - txt_buf0), &pkt);
}
if (i == vanc_line_numbers[idx].field0_vanc_end)
i = vanc_line_numbers[idx].field1_vanc_start - 1;
}
}
vanc->Release();
if (txt_buf - txt_buf0 > 1) {
int stuffing_units = (4 - ((45 + txt_buf - txt_buf0) / 46) % 4) % 4;
while (stuffing_units--) {
memset(txt_buf, 0xff, 46);
txt_buf[1] = 0x2c; // data_unit_length
txt_buf += 46;
}
av_init_packet(&txt_pkt);
txt_pkt.pts = pkt.pts;
txt_pkt.dts = pkt.dts;
txt_pkt.stream_index = ctx->teletext_st->index;
txt_pkt.data = txt_buf0;
txt_pkt.size = txt_buf - txt_buf0;
if (avpacket_queue_put(&ctx->queue, &txt_pkt) < 0) {
++ctx->dropped;
}
}
}
}
pkt.buf = av_buffer_create(pkt.data, pkt.size, decklink_object_free, videoFrame, 0);
if (pkt.buf)
videoFrame->AddRef();
if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {
++ctx->dropped;
}
}
// Handle Audio Frame
if (audioFrame) {
AVPacket pkt;
BMDTimeValue audio_pts;
av_init_packet(&pkt);
//hack among hacks
pkt.size = audioFrame->GetSampleFrameCount() * ctx->audio_st->codecpar->channels * (ctx->audio_depth / 8);
audioFrame->GetBytes(&audioFrameBytes);
audioFrame->GetPacketTime(&audio_pts, ctx->audio_st->time_base.den);
pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, abs_wallclock, ctx->audio_pts_source, ctx->audio_st->time_base, &initial_audio_pts, cctx->copyts);
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;
if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {
++ctx->dropped;
}
}
return S_OK;
}
HRESULT decklink_input_callback::VideoInputFormatChanged(
BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode *mode,
BMDDetectedVideoInputFormatFlags)
{
ctx->bmd_mode = mode->GetDisplayMode();
return S_OK;
}
static int decklink_autodetect(struct decklink_cctx *cctx) {
struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
DECKLINK_BOOL autodetect_supported = false;
int i;
if (ctx->attr->GetFlag(BMDDeckLinkSupportsInputFormatDetection, &autodetect_supported) != S_OK)
return -1;
if (autodetect_supported == false)
return -1;
ctx->autodetect = 1;
ctx->bmd_mode = bmdModeUnknown;
if (ctx->dli->EnableVideoInput(AUTODETECT_DEFAULT_MODE,
bmdFormat8BitYUV,
bmdVideoInputEnableFormatDetection) != S_OK) {
return -1;
}
if (ctx->dli->StartStreams() != S_OK) {
return -1;
}
// 1 second timeout
for (i = 0; i < 10; i++) {
av_usleep(100000);
/* Sometimes VideoInputFrameArrived is called without the
* bmdFrameHasNoInputSource flag before VideoInputFormatChanged.
* So don't break for bmd_mode == AUTODETECT_DEFAULT_MODE. */
if (ctx->bmd_mode != bmdModeUnknown &&
ctx->bmd_mode != AUTODETECT_DEFAULT_MODE)
break;
}
ctx->dli->PauseStreams();
ctx->dli->FlushStreams();
ctx->autodetect = 0;
if (ctx->bmd_mode != bmdModeUnknown) {
cctx->format_code = (char *)av_mallocz(5);
if (!cctx->format_code)
return -1;
AV_WB32(cctx->format_code, ctx->bmd_mode);
return 0;
} else {
return -1;
}
}
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();
}
ff_decklink_cleanup(avctx);
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;
class decklink_allocator *allocator;
class decklink_input_callback *input_callback;
AVStream *st;
HRESULT result;
char fname[1024];
char *tmp;
int mode_num = 0;
int ret;
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->teletext_lines = cctx->teletext_lines;
ctx->preroll = cctx->preroll;
ctx->duplex_mode = cctx->duplex_mode;