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lavcodec: Adding support for End Trimming in Opus encoder 

Adds the end trimming value (duration to be trimmed from the end
of the file due to padding) to the packet's side data. This is
then made use by the muxer to put the value in the container.

Signed-off-by: Vignesh Venkatasubramanian <vigneshv@google.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Vignesh Venkatasubramanian 2013-08-30 11:26:53 -07:00 committed by Michael Niedermayer
parent 7b0a839b0b
commit ae12d65538
1 changed files with 20 additions and 0 deletions
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20
libavcodec/libopusenc.c
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@ -313,6 +313,7 @@ static int libopus_encode(AVCodecContext *avctx, AVPacket *avpkt,
av_get_bytes_per_sample(avctx->sample_fmt);
uint8_t *audio;
int ret;
int discard_padding;
if (frame) {
ff_af_queue_add(&opus->afq, frame);
@ -354,6 +355,25 @@ static int libopus_encode(AVCodecContext *avctx, AVPacket *avpkt,
ff_af_queue_remove(&opus->afq, opus->opts.packet_size,
&avpkt->pts, &avpkt->duration);
discard_padding = opus->opts.packet_size - avpkt->duration;
// Check if subtraction resulted in an overflow
if ((discard_padding < opus->opts.packet_size) != (avpkt->duration > 0)) {
av_free_packet(avpkt);
av_free(avpkt);
return AVERROR(EINVAL);
}
if (discard_padding > 0) {
uint8_t* side_data = av_packet_new_side_data(avpkt,
AV_PKT_DATA_SKIP_SAMPLES,
10);
if(side_data == NULL) {
av_free_packet(avpkt);
av_free(avpkt);
return AVERROR(ENOMEM);
}
AV_WL32(side_data + 4, discard_padding);
}
*got_packet_ptr = 1;
return 0;