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avformat/mpegts: delay allocation of PES buffer

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This allows us to allocate the buffer in a single code path.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2021-09-21 06:02:21 +02:00
parent ce8db0c253
commit 65cd43cff3
1 changed files with 10 additions and 10 deletions
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20
libavformat/mpegts.c
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@ -1189,11 +1189,6 @@ static int mpegts_push_data(MpegTSFilter *filter,
if (!pes->total_size)
pes->total_size = MAX_PES_PAYLOAD;
/* allocate pes buffer */
pes->buffer = buffer_pool_get(ts, pes->total_size);
if (!pes->buffer)
return AVERROR(ENOMEM);
if (pes->stream_id != STREAM_ID_PROGRAM_STREAM_MAP &&
pes->stream_id != STREAM_ID_PRIVATE_STREAM_2 &&
pes->stream_id != STREAM_ID_ECM_STREAM &&
@ -1364,16 +1359,13 @@ skip:
}
break;
case MPEGTS_PAYLOAD:
if (pes->buffer) {
do {
if (pes->data_index > 0 &&
pes->data_index + buf_size > pes->total_size) {
ret = new_pes_packet(pes, ts->pkt);
if (ret < 0)
return ret;
pes->total_size = MAX_PES_PAYLOAD;
pes->buffer = buffer_pool_get(ts, pes->total_size);
if (!pes->buffer)
return AVERROR(ENOMEM);
ts->stop_parse = 1;
} else if (pes->data_index == 0 &&
buf_size > pes->total_size) {
@ -1381,6 +1373,13 @@ skip:
// not sure if this is legal in ts but see issue #2392
buf_size = pes->total_size;
}
if (!pes->buffer) {
pes->buffer = buffer_pool_get(ts, pes->total_size);
if (!pes->buffer)
return AVERROR(ENOMEM);
}
memcpy(pes->buffer->data + pes->data_index, p, buf_size);
pes->data_index += buf_size;
/* emit complete packets with known packet size
@ -1392,10 +1391,11 @@ skip:
pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
ts->stop_parse = 1;
ret = new_pes_packet(pes, ts->pkt);
pes->state = MPEGTS_SKIP;
if (ret < 0)
return ret;
}
}
} while (0);
buf_size = 0;
break;
case MPEGTS_SKIP: