static refbuf_t *get_buffer_finished (ogg_state_t *ogg_info, ogg_codec_t *codec)
{
vorbis_codec_t *source_vorbis = codec->specific;
ogg_page page;
refbuf_t *refbuf;
if (ogg_stream_flush (&source_vorbis->new_os, &page) > 0)
{
source_vorbis->samples_in_page -= (ogg_page_granulepos (&page) - source_vorbis->prev_page_samples);
source_vorbis->prev_page_samples = ogg_page_granulepos (&page);
refbuf = make_refbuf_with_page (&page);
DEBUG0 ("flushing page");
return refbuf;
}
ogg_stream_clear (&source_vorbis->new_os);
ogg_stream_init (&source_vorbis->new_os, rand());
format_ogg_free_headers (ogg_info);
source_vorbis->get_buffer_page = NULL;
if (source_vorbis->prev_packet)
source_vorbis->process_packet = process_vorbis_headers;
else
source_vorbis->process_packet = NULL;
if (source_vorbis->initial_audio_packet == 0)
source_vorbis->prev_window = 0;
return NULL;
}
/* routine for taking the provided page (should be a header page) and
* placing it on the collection of header pages
*/
void format_ogg_attach_header (ogg_codec_t *codec, ogg_page *page)
{
ogg_state_t *ogg_info = codec->parent;
refbuf_t *refbuf;
if (codec->filtered)
return;
refbuf = make_refbuf_with_page (codec, page);
if (ogg_page_bos (page))
{
DEBUG0 ("attaching BOS page");
if (*ogg_info->bos_end == NULL)
ogg_info->header_pages_tail = refbuf;
refbuf->associated = *ogg_info->bos_end;
*ogg_info->bos_end = refbuf;
ogg_info->bos_end = &refbuf->associated;
return;
}
DEBUG0 ("attaching header page");
if (ogg_info->header_pages_tail)
ogg_info->header_pages_tail->associated = refbuf;
ogg_info->header_pages_tail = refbuf;
if (ogg_info->header_pages == NULL)
ogg_info->header_pages = refbuf;
}
/* Here, we just verify the page is ok and then add it to the queue */
static refbuf_t *process_midi_page (ogg_state_t *ogg_info, ogg_codec_t *codec, ogg_page *page, format_plugin_t *plugin)
{
refbuf_t * refbuf;
if (ogg_stream_pagein (&codec->os, page) < 0)
{
ogg_info->error = 1;
return NULL;
}
refbuf = make_refbuf_with_page (page);
return refbuf;
}
static refbuf_t *get_buffer_audio (ogg_state_t *ogg_info, ogg_codec_t *codec)
{
refbuf_t *refbuf = NULL;
ogg_page page;
vorbis_codec_t *source_vorbis = codec->specific;
int (*get_ogg_page)(ogg_stream_state*, ogg_page *) = ogg_stream_pageout;
if (source_vorbis->samples_in_page > source_vorbis->page_samples_trigger)
get_ogg_page = ogg_stream_flush;
if (get_ogg_page (&source_vorbis->new_os, &page) > 0)
{
/* squeeze a page copy into a buffer */
source_vorbis->samples_in_page -= (ogg_page_granulepos (&page) - source_vorbis->prev_page_samples);
source_vorbis->prev_page_samples = ogg_page_granulepos (&page);
refbuf = make_refbuf_with_page (&page);
}
return refbuf;
}
static refbuf_t *process_opus_page (ogg_state_t *ogg_info,
ogg_codec_t *codec, ogg_page *page)
{
refbuf_t *refbuf;
if (codec->headers < 2)
{
ogg_packet packet;
ogg_stream_pagein (&codec->os, page);
while (ogg_stream_packetout (&codec->os, &packet) > 0)
{
/* first time around (normal case) yields comments */
codec->headers++;
}
/* add header page to associated list */
format_ogg_attach_header (codec, page);
return NULL;
}
refbuf = make_refbuf_with_page (codec, page);
return refbuf;
}
/* routine for taking the provided page (should be a header page) and
* placing it on the collection of header pages
*/
void format_ogg_attach_header (ogg_state_t *ogg_info, ogg_page *page)
{
refbuf_t *refbuf = make_refbuf_with_page (page);
if (ogg_page_bos (page))
{
DEBUG0 ("attaching BOS page");
if (*ogg_info->bos_end == NULL)
ogg_info->header_pages_tail = refbuf;
refbuf->next = *ogg_info->bos_end;
*ogg_info->bos_end = refbuf;
ogg_info->bos_end = &refbuf->next;
return;
}
DEBUG0 ("attaching header page");
if (ogg_info->header_pages_tail)
ogg_info->header_pages_tail->next = refbuf;
ogg_info->header_pages_tail = refbuf;
if (ogg_info->header_pages == NULL)
ogg_info->header_pages = refbuf;
}
/* Here, we just verify the page is ok and then add it to the queue */
static refbuf_t *process_flac_page (ogg_state_t *ogg_info, ogg_codec_t *codec, ogg_page *page)
{
refbuf_t * refbuf;
if (codec->headers)
{
ogg_packet packet;
if (ogg_stream_pagein (&codec->os, page) < 0)
{
ogg_info->error = 1;
return NULL;
}
while (ogg_stream_packetout (&codec->os, &packet))
{
int type = packet.packet[0];
if (type == 0xFF)
{
codec->headers = 0;
break;
}
if (type >= 1 && type <= 0x7E)
continue;
if (type >= 0x81 && type <= 0xFE)
continue;
ogg_info->error = 1;
return NULL;
}
if (codec->headers)
{
format_ogg_attach_header (ogg_info, page);
return NULL;
}
}
refbuf = make_refbuf_with_page (page);
return refbuf;
}
/* no processing of pages, just wrap them up in a refbuf and pass
* back for adding to the queue
*/
static refbuf_t *process_vorbis_passthru_page (ogg_state_t *ogg_info,
ogg_codec_t *codec, ogg_page *page)
{
return make_refbuf_with_page (page);
}
