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h264/pic_timing: support multiple timecodes

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This commit is contained in:
Josh de Kock 2018-10-12 13:38:26 +01:00 committed by Kieran Kunhya
parent 4241e44a3c
commit 76a8c3b522
3 changed files with 66 additions and 44 deletions
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21
libavcodec/h264_sei.c
View File

@ -84,8 +84,10 @@ static int decode_picture_timing(H264SEIPictureTiming *h, GetBitContext *gb,
return AVERROR_INVALIDDATA;
num_clock_ts = sei_num_clock_ts_table[h->pic_struct];
h->timecode_cnt = 0;
for (i = 0; i < num_clock_ts; i++) {
if (get_bits(gb, 1)) { /* clock_timestamp_flag */
H264SEITimeCode *tc = &h->timecode[h->timecode_cnt++];
unsigned int full_timestamp_flag;
unsigned int counting_type, cnt_dropped_flag;
h->ct_type |= 1 << get_bits(gb, 2);
@ -95,20 +97,21 @@ static int decode_picture_timing(H264SEIPictureTiming *h, GetBitContext *gb,
skip_bits(gb, 1); /* discontinuity_flag */
cnt_dropped_flag = get_bits(gb, 1); /* cnt_dropped_flag */
if (cnt_dropped_flag && counting_type > 1 && counting_type < 7)
h->tc_dropframe = 1;
h->tc_frames = get_bits(gb, 8); /* n_frames */
tc->dropframe = 1;
tc->frame = get_bits(gb, 8); /* n_frames */
if (full_timestamp_flag) {
h->fulltc_received = 1;
h->tc_seconds = get_bits(gb, 6); /* seconds_value 0..59 */
h->tc_minutes = get_bits(gb, 6); /* minutes_value 0..59 */
h->tc_hours = get_bits(gb, 5); /* hours_value 0..23 */
tc->full = 1;
tc->seconds = get_bits(gb, 6); /* seconds_value 0..59 */
tc->minutes = get_bits(gb, 6); /* minutes_value 0..59 */
tc->hours = get_bits(gb, 5); /* hours_value 0..23 */
} else {
tc->seconds = tc->minutes = tc->hours = tc->full = 0;
if (get_bits(gb, 1)) { /* seconds_flag */
h->tc_seconds = get_bits(gb, 6);
tc->seconds = get_bits(gb, 6);
if (get_bits(gb, 1)) { /* minutes_flag */
h->tc_minutes = get_bits(gb, 6);
tc->minutes = get_bits(gb, 6);
if (get_bits(gb, 1)) /* hours_flag */
h->tc_minutes = get_bits(gb, 5);
tc->hours = get_bits(gb, 5);
}
}
}

28
libavcodec/h264_sei.h
View File

@ -67,6 +67,17 @@ typedef enum {
H264_SEI_FPA_TYPE_2D = 6,
} H264_SEI_FpaType;
typedef struct H264SEITimeCode {
/* When not continuously receiving full timecodes, we have to reference
the previous timecode received */
int full;
int frame;
int seconds;
int minutes;
int hours;
int dropframe;
} H264SEITimeCode;
typedef struct H264SEIPictureTiming {
int present;
H264_SEI_PicStructType pic_struct;
@ -88,14 +99,15 @@ typedef struct H264SEIPictureTiming {
*/
int cpb_removal_delay;
/* When not continuously receiving full timecodes, we have to reference
the previous timecode received */
int fulltc_received;
int tc_frames;
int tc_seconds;
int tc_minutes;
int tc_hours;
int tc_dropframe;
/**
* Maximum three timecodes in a pic_timing SEI.
*/
H264SEITimeCode timecode[3];
/**
* Number of timecode in use
*/
int timecode_cnt;
} H264SEIPictureTiming;
typedef struct H264SEIAFD {

61
libavcodec/h264_slice.c
View File

@ -1287,42 +1287,49 @@ static int h264_export_frame_props(H264Context *h)
h->avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
}
if (h->sei.picture_timing.fulltc_received) {
if (h->sei.picture_timing.timecode_cnt > 0) {
uint32_t tc = 0;
uint32_t frames;
uint32_t *tc_sd;
AVFrameSideData *tcside = av_frame_new_side_data(cur->f,
AV_FRAME_DATA_S12M_TIMECODE,
sizeof(uint32_t));
sizeof(uint32_t)*4);
if (!tcside)
return AVERROR(ENOMEM);
/* For SMPTE 12-M timecodes, frame count is a special case if > 30 FPS.
See SMPTE ST 12-1:2014 Sec 12.1 for more info. */
if (av_cmp_q(h->avctx->framerate, (AVRational) {30, 1}) == 1) {
frames = h->sei.picture_timing.tc_frames / 2;
if (h->sei.picture_timing.tc_frames % 2 == 1) {
if (av_cmp_q(h->avctx->framerate, (AVRational) {50, 1}) == 0)
tc |= (1 << 7);
else
tc |= (1 << 23);
tc_sd = (uint32_t*)tcside->data;
tc_sd[0] = h->sei.picture_timing.timecode_cnt;
for (int i = 0; i < tc_sd[0]; i++) {
uint32_t frames;
/* For SMPTE 12-M timecodes, frame count is a special case if > 30 FPS.
See SMPTE ST 12-1:2014 Sec 12.1 for more info. */
if (av_cmp_q(h->avctx->framerate, (AVRational) {30, 1}) == 1) {
frames = h->sei.picture_timing.timecode[i].frame / 2;
if (h->sei.picture_timing.timecode[i].frame % 2 == 1) {
if (av_cmp_q(h->avctx->framerate, (AVRational) {50, 1}) == 0)
tc |= (1 << 7);
else
tc |= (1 << 23);
}
} else {
frames = h->sei.picture_timing.timecode[i].frame;
}
} else {
frames = h->sei.picture_timing.tc_frames;
tc |= h->sei.picture_timing.timecode[i].dropframe << 30;
tc |= (frames / 10) << 28;
tc |= (frames % 10) << 24;
tc |= (h->sei.picture_timing.timecode[i].seconds / 10) << 20;
tc |= (h->sei.picture_timing.timecode[i].seconds % 10) << 16;
tc |= (h->sei.picture_timing.timecode[i].minutes / 10) << 12;
tc |= (h->sei.picture_timing.timecode[i].minutes % 10) << 8;
tc |= (h->sei.picture_timing.timecode[i].hours / 10) << 4;
tc |= (h->sei.picture_timing.timecode[i].hours % 10);
tc_sd[i + 1] = tc;
}
tc |= h->sei.picture_timing.tc_dropframe << 30;
tc |= (frames / 10) << 28;
tc |= (frames % 10) << 24;
tc |= (h->sei.picture_timing.tc_seconds / 10) << 20;
tc |= (h->sei.picture_timing.tc_seconds % 10) << 16;
tc |= (h->sei.picture_timing.tc_minutes / 10) << 12;
tc |= (h->sei.picture_timing.tc_minutes % 10) << 8;
tc |= (h->sei.picture_timing.tc_hours / 10) << 4;
tc |= (h->sei.picture_timing.tc_hours % 10);
memcpy(tcside->data, &tc, sizeof(uint32_t));
h->sei.picture_timing.fulltc_received = 0;
h->sei.picture_timing.timecode_cnt = 0;
}
if (h->sei.alternative_transfer.present &&