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mpegtsenc: Implement writing of Opus trim_start/trim_end control values

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Signed-off-by: Sebastian Dröge <sebastian@centricular.com>
Reviewed-by: Kieran Kunhya <kierank@obe.tv>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Sebastian Dröge 2015-11-02 09:06:19 +02:00 committed by Michael Niedermayer
parent 01509cdf92
commit 7d6a4797f1
1 changed files with 40 additions and 3 deletions
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43
libavformat/mpegtsenc.c
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@ -230,6 +230,7 @@ typedef struct MpegTSWriteStream {
/* For Opus */
int opus_queued_samples;
int opus_pending_trim_start;
} MpegTSWriteStream;
static void mpegts_write_pat(AVFormatContext *s)
@ -825,6 +826,9 @@ static int mpegts_write_header(AVFormatContext *s)
if (ret < 0)
goto fail;
}
if (st->codec->codec_id == AV_CODEC_ID_OPUS) {
ts_st->opus_pending_trim_start = st->codec->initial_padding * 48000 / st->codec->sample_rate;
}
}
av_freep(&pids);
@ -1513,17 +1517,38 @@ static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
/* Add Opus control header */
if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
uint8_t *side_data;
int side_data_size;
int i, n;
int ctrl_header_size;
int trim_start = 0, trim_end = 0;
opus_samples = opus_get_packet_samples(s, pkt);
data = av_malloc(pkt->size + 2 + pkt->size / 255 + 1);
side_data = av_packet_get_side_data(pkt,
AV_PKT_DATA_SKIP_SAMPLES,
&side_data_size);
if (side_data && side_data_size >= 10) {
trim_end = AV_RL32(side_data + 4) * 48000 / st->codec->sample_rate;
}
ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
if (ts_st->opus_pending_trim_start)
ctrl_header_size += 2;
if (trim_end)
ctrl_header_size += 2;
data = av_malloc(ctrl_header_size);
if (!data)
return AVERROR(ENOMEM);
/* TODO: Write trim if needed */
data[0] = 0x7f;
data[1] = 0xe0;
if (ts_st->opus_pending_trim_start)
data[1] |= 0x10;
if (trim_end)
data[1] |= 0x08;
n = pkt->size;
i = 2;
@ -1535,9 +1560,21 @@ static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
av_assert0(2 + pkt->size / 255 + 1 == i);
if (ts_st->opus_pending_trim_start) {
trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
AV_WB16(data + i, trim_start);
i += 2;
ts_st->opus_pending_trim_start -= trim_start;
}
if (trim_end) {
trim_end = FFMIN(trim_end, opus_samples - trim_start);
AV_WB16(data + i, trim_end);
i += 2;
}
memcpy(data + i, pkt->data, pkt->size);
buf = data;
size = pkt->size + 2 + pkt->size / 255 + 1;
size = ctrl_header_size;
} else {
/* TODO: Can we get TS formatted data here? If so we will
* need to count the samples of that too! */