static GslErrorType
wave_handle_open (GslDataHandle *data_handle,
GslDataHandleSetup *setup)
{
WaveHandle *whandle = (WaveHandle*) data_handle;
whandle->hfile = gsl_hfile_open (whandle->dhandle.name);
if (!whandle->hfile)
return gsl_error_from_errno (errno, GSL_ERROR_OPEN_FAILED);
else
{
GslLong l, fwidth = wave_format_byte_width (whandle->format);
/* convert size into n_values, i.e. float length */
l = whandle->hfile->n_bytes;
l -= MIN (l, whandle->byte_offset);
if (l >= fwidth)
{
l /= fwidth;
if (whandle->requested_length < 0)
setup->n_values = l;
else
setup->n_values = MIN (l, whandle->requested_length);
}
else
setup->n_values = 0;
setup->n_channels = whandle->n_channels;
setup->bit_depth = wave_format_bit_depth (whandle->format);
return GSL_ERROR_NONE;
}
}
BseErrorType
gsl_file_check (const gchar *file_name,
const gchar *mode)
{
if (birnet_file_check (file_name, mode))
return BSE_ERROR_NONE;
return gsl_error_from_errno (errno, BSE_ERROR_FILE_OPEN_FAILED);
}
gint
gsl_vorbis1_handle_read (GslVorbis1Handle *v1h, /* returns -errno || length */
guint blength,
guint8 *buffer)
{
if (!v1h->rfile)
{
v1h->rfile = gsl_rfile_open (v1h->dhandle->name);
if (!v1h->rfile)
return gsl_error_from_errno (errno, BSE_ERROR_FILE_OPEN_FAILED);
v1h->byte_length = gsl_rfile_length (v1h->rfile);
if (v1h->rfile_add_zoffset)
{
v1h->byte_offset = gsl_hfile_zoffset (v1h->rfile->hfile) + 1;
v1h->byte_offset += v1h->rfile_byte_offset;
v1h->byte_offset = MIN (v1h->byte_offset, v1h->byte_length);
v1h->byte_length -= v1h->byte_offset;
}
else
{
v1h->byte_offset = MIN (v1h->rfile_byte_offset, v1h->byte_length);
v1h->byte_length -= v1h->byte_offset;
}
if (v1h->rfile_byte_length > 0)
v1h->byte_length = MIN (v1h->byte_length, v1h->rfile_byte_length);
v1h->vcutter = gsl_vorbis_cutter_new();
gsl_vorbis_cutter_filter_serialno (v1h->vcutter, v1h->bitstream_serialno);
gsl_vorbis_cutter_force_serialno (v1h->vcutter, v1h->forced_serialno);
}
while (1) /* repeats until data is available */
{
guint j, n = gsl_vorbis_cutter_read_ogg (v1h->vcutter, blength, buffer);
if (n)
return n; /* got data */
if (gsl_vorbis_cutter_ogg_eos (v1h->vcutter))
return 0; /* done at end-of-stream */
do /* need to feed data */
j = gsl_rfile_read (v1h->rfile, blength, buffer);
while (j < 0 && errno == EINTR);
if (j <= 0) /* bail on errors */
return errno ? -errno : -EIO;
gsl_vorbis_cutter_write_ogg (v1h->vcutter, j, buffer);
}
}
static BseErrorType
dh_vorbis_open (GslDataHandle *dhandle,
GslDataHandleSetup *setup)
{
VorbisHandle *vhandle = (VorbisHandle*) dhandle;
VFile *vfile;
vorbis_info *vi;
GslLong n, i;
gint err;
vfile = g_new0 (VFile, 1);
vfile->rfile = gsl_rfile_open (vhandle->dhandle.name);
if (!vfile->rfile)
{
g_free (vfile);
return gsl_error_from_errno (errno, BSE_ERROR_FILE_OPEN_FAILED);
}
vfile->byte_length = gsl_rfile_length (vfile->rfile);
if (vhandle->rfile_add_zoffset)
{
vfile->byte_offset = gsl_hfile_zoffset (vfile->rfile->hfile) + 1;
vfile->byte_offset += vhandle->rfile_byte_offset;
vfile->byte_offset = MIN (vfile->byte_offset, vfile->byte_length);
vfile->byte_length -= vfile->byte_offset;
}
else
{
vfile->byte_offset = MIN (vhandle->rfile_byte_offset, vfile->byte_length);
vfile->byte_length -= vfile->byte_offset;
}
if (vhandle->rfile_byte_length > 0)
vfile->byte_length = MIN (vfile->byte_length, vhandle->rfile_byte_length);
err = ov_open_callbacks (vfile, &vhandle->ofile, NULL, 0, vfile_ov_callbacks);
if (err < 0)
{
if (0)
g_printerr ("failed to open ogg at offset %d (real offset=%lld) (add-zoffset=%d): %s\n",
vhandle->rfile_byte_offset,
vfile->byte_offset,
vhandle->rfile_add_zoffset,
bse_error_blurb (ov_errno_to_error (err, BSE_ERROR_FILE_OPEN_FAILED)));
vfile_close (vfile);
return ov_errno_to_error (err, BSE_ERROR_FILE_OPEN_FAILED);
}
n = ov_streams (&vhandle->ofile);
if (n > vhandle->bitstream)
{
vhandle->bitstream_serialno = ov_serialnumber (&vhandle->ofile, vhandle->bitstream);
vhandle->n_bitstreams = n;
if (0)
g_printerr ("Ogg/Vorbis: opening ogg: bitstream=%d/%d serialno=%d\n", vhandle->bitstream, vhandle->n_bitstreams, vhandle->bitstream_serialno);
}
else
{
ov_clear (&vhandle->ofile); /* closes file */
return BSE_ERROR_NO_DATA; /* requested bitstream not available */
}
vhandle->soffset = 0;
for (i = 0; i < vhandle->bitstream; i++)
vhandle->soffset += ov_pcm_total (&vhandle->ofile, i);
n = ov_pcm_total (&vhandle->ofile, vhandle->bitstream);
vi = ov_info (&vhandle->ofile, vhandle->bitstream);
if (n > 0 && vi && vi->channels && ov_pcm_seek (&vhandle->ofile, vhandle->soffset) >= 0)
{
setup->n_channels = vi->channels;
setup->n_values = n * setup->n_channels;
}
else
{
ov_clear (&vhandle->ofile); /* closes file */
return BSE_ERROR_NO_DATA;
}
vhandle->max_block_size = vorbis_info_blocksize (vi, 0);
n = vorbis_info_blocksize (vi, 1);
vhandle->max_block_size = MAX (vhandle->max_block_size, n);
vhandle->pcm_pos = 0;
vhandle->pcm_length = 0;
setup->bit_depth = 24;
setup->mix_freq = vi->rate;
setup->needs_cache = TRUE;
setup->xinfos = bse_xinfos_add_float (setup->xinfos, "osc-freq", vhandle->osc_freq);
return BSE_ERROR_NONE;
}