BOOL ovd_parse_stream(ovd_stream_buf* buf)
{
ovd_handle* handle = (ovd_handle*)buf->handle;
ogg_sync_wrote(handle->oy, buf->len);
if (ogg_sync_pageout(handle->oy, &handle->og) != 1)
goto fail;
// ogg_stream_init(&handle->os, ogg_page_serialno(&handle->og));
handle->os = ogg_stream_create(ogg_page_serialno(&handle->og));
vorbis_info_init(&handle->vi);
vorbis_comment_init(&handle->vc);
if (ogg_stream_pagein(handle->os, &handle->og) < 0)
goto fail;
if (ogg_stream_packetout(handle->os,&handle->op) != 1)
goto fail;
if (vorbis_synthesis_headerin(&handle->vi, &handle->vc, &handle->op) < 0)
goto fail;
handle->init = 0;
handle->eof = 0;
ovd_header_init(handle);
buf->buf = ogg_sync_bufferin(handle->oy, OVD_STREAM_BUF_LEN);
buf->len = OVD_STREAM_BUF_LEN;
return TRUE;
fail:
// ogg_sync_init(&handle->oy);
handle->oy = ogg_sync_create();
buf->buf = ogg_sync_bufferin(handle->oy, OVD_STREAM_BUF_LEN);
buf->len = OVD_STREAM_BUF_LEN;
return FALSE;
}
static int Init(ogg* p)
{
format_reader* Reader = p->Format.Reader;
format_buffer* Buffer;
int i;
memset(&p->OggPage,0,sizeof(ogg_page));
p->OggSync = ogg_sync_create();
p->Format.TimeStamps = 1;
if (!p->OggSync)
return ERR_OUT_OF_MEMORY;
Format_ReadBuffer(Reader,0);
Buffer = Format_BufferRemove(Reader);
if (!Buffer)
return ERR_INVALID_DATA;
// search for 'OggS' pattern
for (i=3;i<Buffer->Length;++i)
if (Buffer->Block.Ptr[i-3]=='O' &&
Buffer->Block.Ptr[i-2]=='g' &&
Buffer->Block.Ptr[i-1]=='g' &&
Buffer->Block.Ptr[i-0]=='S')
break;
if (i==Buffer->Length)
{
Format_BufferRelease(&p->Format,Buffer);
return ERR_INVALID_DATA;
}
return AddBuffer(p,Buffer);
}
ovd_stream_buf* ovd_init_stream()
{
ovd_handle* handle = new ovd_handle;
memset(handle, 0, sizeof(ovd_handle));
// ogg_sync_init(&handle->oy);
handle->oy = ogg_sync_create();
ovd_stream_buf* ret = new ovd_stream_buf;
ret->handle = (HANDLE)handle;
ret->buf = ogg_sync_bufferin(handle->oy, OVD_STREAM_BUF_LEN);
ret->len = OVD_STREAM_BUF_LEN;
return ret;
}
static int ReadPacketTime( ogg* p, format_reader* Reader, format_packet* Packet )
{
// only called by CalcDuration
format_buffer* Buffer;
int Bytes;
ogg_buffer* Ptr;
ogg_sync_state* Sync = ogg_sync_create();
ogg_page Page;
if (!Sync)
return ERR_OUT_OF_MEMORY;
while ((Buffer = Format_BufferRemove(Reader))!=NULL)
{
Ptr = ogg_sync_bufferinext(Sync);
if (Ptr)
{
Ptr->ext = &p->Format;
Ptr->extdata = Buffer;
Ptr->data = Buffer->Block.Ptr;
Ptr->size = Buffer->Length;
ogg_sync_wrote(Sync,Buffer->Length);
}
else
Format_BufferRelease(&p->Format,Buffer);
}
memset(&Page,0,sizeof(Page));
while ((Bytes = ogg_sync_pageseek(Sync,&Page)) != 0)
{
if (Bytes > 0)
{
int64_t MediaTime = ogg_page_granulepos(&Page);
int Id = ogg_page_serialno(&Page);
int i;
if (MediaTime != -1)
for (i=0;i<p->Format.StreamCount;++i)
if (p->Format.Streams[i]->Id == Id)
{
oggstream* s = (oggstream*) p->Format.Streams[i];
if (s->MediaRateNum)
{
tick_t RefTime = (tick_t)((MediaTime * s->MediaRateDen) / s->MediaRateNum);
if (RefTime > Packet->RefTime)
{
Packet->Stream = &s->Stream;
Packet->RefTime = RefTime;
}
}
break;
}
}
}
ogg_page_release(&Page);
ogg_sync_destroy(Sync);
return ERR_NONE;
}
