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oggstream: recognize opus headers from data, not packet count

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Opus streams outside of Ogg may not have headers, and oggstream
may be used by oggmux to mux an Opus stream which does not come
from Ogg - thus without headers.
Determining headerness by packet count would strip the first two
packets from such an Opus stream, leading to a very small amount
of audio being clipped at the beginning of the stream.
This commit is contained in:
Vincent Penquerc'h 2011-11-22 13:15:33 +00:00
parent 9d4989395c
commit bf73491077
1 changed files with 8 additions and 2 deletions
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10
ext/ogg/gstoggstream.c
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@ -1872,6 +1872,12 @@ setup_opus_mapper (GstOggStream * pad, ogg_packet * packet)
return TRUE;
}
static gboolean
is_header_opus (GstOggStream * pad, ogg_packet * packet)
{
return packet->bytes >= 8 && !memcmp (packet->packet, "Opus", 4);
}
static gint64
packet_duration_opus (GstOggStream * pad, ogg_packet * packet)
{
@ -1896,7 +1902,7 @@ packet_duration_opus (GstOggStream * pad, ogg_packet * packet)
return 0;
/* headers */
if (packet->bytes >= 8 && !memcmp (packet->packet, "Opus", 4))
if (is_header_opus (pad, packet))
return 0;
toc = packet->packet[0];
@ -2109,7 +2115,7 @@ const GstOggMap mappers[] = {
granulepos_to_granule_default,
granule_to_granulepos_default,
NULL,
is_header_count,
is_header_opus,
packet_duration_opus,
NULL,
extract_tags_count