On 06/17/2012 11:03 AM, Martin Storsjö wrote:
> +static int ilbc_read_header(AVFormatContext *s)
> +{
> + AVIOContext *pb = s->pb;
> + AVStream *st;
> + uint8_t header[9];
> +
> + avio_read(pb, header, 9);
> +
> + st = avformat_new_stream(s, NULL);
> + if (!st)
> + return AVERROR(ENOMEM);
> + st->codec->codec_id = CODEC_ID_ILBC;
> + st->codec->sample_rate = 8000;
> + st->codec->channels = 1;
> + st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
> + avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
> + if (!memcmp(header, mode20_header, sizeof(mode20_header) - 1)) {
> + st->codec->block_align = 38;
> + st->codec->bit_rate = 15200;
> + } else if (!memcmp(header, mode30_header, sizeof(mode30_header) - 1)) {
> + st->codec->block_align = 50;
> + st->codec->bit_rate = 13333;
> + } else {
> + av_log(s, AV_LOG_ERROR, "Unrecognized iLBC file header\n");
> + return AVERROR_INVALIDDATA;
> + }
> +
> + return 0;
> +}
Since you're setting only packet durations and not timestamps, you
should also set st->start_time to 0 when initializing the stream.
The rest looks good.
-Justin
_______________________________________________
libav-devel mailing list
[email protected]
https://lists.libav.org/mailman/listinfo/libav-devel
