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fixup granulepos on EOS case when rebuilding vorbis streams. This was causing

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a short audio glitch on playback, but was not typically noticed.

svn path=/icecast/trunk/icecast/; revision=10369
This commit is contained in:
Karl Heyes 2005-11-15 00:29:24 +00:00
parent c3f75a858d
commit 280006162e
1 changed files with 30 additions and 2 deletions
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32
src/format_vorbis.c
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@ -42,12 +42,14 @@ typedef struct vorbis_codec_tag
int rebuild_comment;
int stream_notify;
int initial_audio_page;
ogg_stream_state new_os;
int page_samples_trigger;
ogg_int64_t prev_granulepos;
ogg_packet *prev_packet;
ogg_int64_t granulepos;
ogg_int64_t initial_page_granulepos;
ogg_int64_t samples_in_page;
int prev_window;
int initial_audio_packet;
@ -216,10 +218,10 @@ static refbuf_t *get_buffer_finished (ogg_state_t *ogg_info, ogg_codec_t *codec)
/* push last packet into stream marked with eos */
static void initiate_flush (vorbis_codec_t *source_vorbis)
{
DEBUG0 ("adding EOS packet");
if (source_vorbis->prev_packet)
{
/* insert prev_packet with eos */
DEBUG0 ("adding EOS packet");
source_vorbis->prev_packet->e_o_s = 1;
add_audio_packet (source_vorbis, source_vorbis->prev_packet);
source_vorbis->prev_packet->e_o_s = 0;
@ -256,7 +258,25 @@ static int process_vorbis_audio (ogg_state_t *ogg_info, ogg_codec_t *codec)
add_audio_packet (source_vorbis, prev_packet);
free_ogg_packet (prev_packet);
packet . granulepos = source_vorbis->granulepos;
/* check for short values on first initial page */
if (packet . packetno == 4)
{
if (source_vorbis->initial_page_granulepos < source_vorbis->granulepos)
{
source_vorbis->granulepos -= source_vorbis->initial_page_granulepos;
source_vorbis->samples_in_page = source_vorbis->page_samples_trigger;
}
}
/* check for long values on first page */
if (packet.granulepos == source_vorbis->initial_page_granulepos)
{
if (source_vorbis->initial_page_granulepos > source_vorbis->granulepos)
source_vorbis->granulepos = source_vorbis->initial_page_granulepos;
}
if (packet.e_o_s == 0)
packet . granulepos = source_vorbis->granulepos;
}
else
{
@ -497,7 +517,14 @@ static refbuf_t *process_vorbis_page (ogg_state_t *ogg_info,
return NULL;
}
if (codec->headers == 3)
{
if (source_vorbis->initial_audio_page)
{
source_vorbis->initial_page_granulepos = ogg_page_granulepos (page);
source_vorbis->initial_audio_page = 0;
}
return NULL;
}
while (codec->headers < 3)
{
@ -530,6 +557,7 @@ static refbuf_t *process_vorbis_page (ogg_state_t *ogg_info,
/* set queued vorbis pages to contain about 1/2 of a second worth of samples */
source_vorbis->page_samples_trigger = source_vorbis->vi.rate / 2;
source_vorbis->process_packet = process_vorbis_headers;
source_vorbis->initial_audio_page = 1;
}
else
{