static sf_count_t
vorbis_length (SF_PRIVATE *psf)
{ sf_count_t length ;
int error ;
if (psf->sf.seekable == 0)
return SF_COUNT_MAX ;
psf_fseek (psf, 0, SEEK_SET) ;
length = vorbis_length_aux (psf) ;
psf_fseek (psf, 12, SEEK_SET) ;
if ((error = vorbis_read_header (psf, 0)) != 0)
psf->error = error ;
return length ;
} /* vorbis_length */
static sf_count_t
vorbis_seek (SF_PRIVATE *psf, int UNUSED (mode), sf_count_t offset)
{
OGG_PRIVATE *odata = (OGG_PRIVATE *) psf->container_data ;
VORBIS_PRIVATE *vdata = (VORBIS_PRIVATE *) psf->codec_data ;
if (odata == NULL || vdata == NULL)
return 0 ;
if (offset < 0)
{ psf->error = SFE_BAD_SEEK ;
return ((sf_count_t) -1) ;
} ;
if (psf->file.mode == SFM_READ)
{ sf_count_t target = offset - vdata->loc ;
if (target < 0)
{ /* 12 to allow for OggS bit */
psf_fseek (psf, 12, SEEK_SET) ;
vorbis_read_header (psf, 0) ; /* Reset state */
target = offset ;
} ;
while (target > 0)
{ sf_count_t m = target > 4096 ? 4096 : target ;
/*
** Need to multiply by channels here because the seek is done in
** terms of frames and the read function is done in terms of
** samples.
*/
vorbis_read_sample (psf, (void *) NULL, m * psf->sf.channels, vorbis_rnull) ;
target -= m ;
} ;
return vdata->loc ;
} ;
return 0 ;
} /* vorbis_seek */
int
ogg_vorbis_open (SF_PRIVATE *psf)
{ OGG_PRIVATE* odata = psf->container_data ;
VORBIS_PRIVATE* vdata = calloc (1, sizeof (VORBIS_PRIVATE)) ;
int error = 0 ;
if (odata == NULL)
{ psf_log_printf (psf, "%s : odata is NULL???\n", __func__) ;
return SFE_INTERNAL ;
} ;
psf->codec_data = vdata ;
if (psf->file.mode == SFM_RDWR)
return SFE_BAD_MODE_RW ;
psf_log_printf (psf, "Vorbis library version : %s\n", vorbis_version_string ()) ;
if (psf->file.mode == SFM_READ)
{ /* Call this here so it only gets called once, so no memory is leaked. */
ogg_sync_init (&odata->osync) ;
if ((error = vorbis_read_header (psf, 1)))
return error ;
psf->read_short = vorbis_read_s ;
psf->read_int = vorbis_read_i ;
psf->read_float = vorbis_read_f ;
psf->read_double = vorbis_read_d ;
psf->sf.frames = vorbis_length (psf) ;
} ;
psf->codec_close = vorbis_close ;
if (psf->file.mode == SFM_WRITE)
{ /* Set the default vorbis quality here. */
vdata->quality = 0.4 ;
psf->write_header = vorbis_write_header ;
psf->write_short = vorbis_write_s ;
psf->write_int = vorbis_write_i ;
psf->write_float = vorbis_write_f ;
psf->write_double = vorbis_write_d ;
psf->sf.frames = SF_COUNT_MAX ; /* Unknown really */
psf->strings.flags = SF_STR_ALLOW_START ;
} ;
psf->seek = vorbis_seek ;
psf->command = vorbis_command ;
psf->byterate = vorbis_byterate ;
/* FIXME, FIXME, FIXME : Hack these here for now and correct later. */
psf->sf.format = SF_FORMAT_OGG | SF_FORMAT_VORBIS ;
psf->sf.sections = 1 ;
psf->datalength = 1 ;
psf->dataoffset = 0 ;
/* End FIXME. */
return error ;
} /* ogg_vorbis_open */