diff options
| -rw-r--r-- | libavformat/oggparseopus.c | 36 |
1 files changed, 21 insertions, 15 deletions
diff --git a/libavformat/oggparseopus.c b/libavformat/oggparseopus.c index 94267b26f3..96aeb382cf 100644 --- a/libavformat/oggparseopus.c +++ b/libavformat/oggparseopus.c @@ -82,6 +82,26 @@ static int opus_header(AVFormatContext *avf, int idx) return 0; } +static int opus_duration(uint8_t *src, int size) +{ + unsigned nb_frames = 1; + unsigned toc = src[0]; + unsigned toc_config = toc >> 3; + unsigned toc_count = toc & 3; + unsigned frame_size = toc_config < 12 ? FFMAX(480, 960 * (toc_config & 3)) : + toc_config < 16 ? 480 << (toc_config & 1) : + 120 << (toc_config & 3); + if (toc_count == 3) { + if (size<2) + return AVERROR_INVALIDDATA; + nb_frames = src[1] & 0x3F; + } else if (toc_count) { + nb_frames = 2; + } + + return frame_size * nb_frames; +} + static int opus_packet(AVFormatContext *avf, int idx) { struct ogg *ogg = avf->priv_data; @@ -89,26 +109,12 @@ static int opus_packet(AVFormatContext *avf, int idx) AVStream *st = avf->streams[idx]; struct oggopus_private *priv = os->private; uint8_t *packet = os->buf + os->pstart; - unsigned toc, toc_config, toc_count, frame_size, nb_frames = 1; if (!os->psize) return AVERROR_INVALIDDATA; - toc = *packet; - toc_config = toc >> 3; - toc_count = toc & 3; - frame_size = toc_config < 12 ? FFMAX(480, 960 * (toc_config & 3)) : - toc_config < 16 ? 480 << (toc_config & 1) : - 120 << (toc_config & 3); - if (toc_count == 3) { - if (os->psize < 2) - return AVERROR_INVALIDDATA; - nb_frames = packet[1] & 0x3F; - } else if (toc_count) { - nb_frames = 2; - } - os->pduration = frame_size * nb_frames; + os->pduration = opus_duration(packet, os->psize); if (os->lastpts != AV_NOPTS_VALUE) { if (st->start_time == AV_NOPTS_VALUE) st->start_time = os->lastpts; |