/* Fill info structure with data from ogg comments */
static void vorbis_tags (const char *file_name, struct file_tags *info,
const int tags_sel)
{
OggVorbis_File vf;
FILE *file;
int err_code;
if (!(file = fopen (file_name, "r"))) {
logit ("Can't open an OGG file: %s", strerror(errno));
return;
}
/* ov_test() is faster than ov_open(), but we can't read file time
* with it. */
if (tags_sel & TAGS_TIME) {
if ((err_code = ov_open(file, &vf, NULL, 0)) < 0) {
char *vorbis_err = vorbis_strerror (err_code);
logit ("Can't open %s: %s", file_name, vorbis_err);
free (vorbis_err);
fclose (file);
return;
}
}
else {
if ((err_code = ov_test(file, &vf, NULL, 0)) < 0) {
char *vorbis_err = vorbis_strerror (err_code);
logit ("Can't open %s: %s", file_name, vorbis_err);
free (vorbis_err);
fclose (file);
return;
}
}
if (tags_sel & TAGS_COMMENTS)
get_comment_tags (&vf, info);
if (tags_sel & TAGS_TIME) {
int64_t vorbis_time;
vorbis_time = ov_time_total (&vf, -1);
if (vorbis_time >= 0)
info->time = vorbis_time / time_scaler;
}
ov_clear (&vf);
}
static bool
vorbis_is_open(struct vorbis_input_stream *vis, OggVorbis_File *vf,
struct decoder *decoder, struct input_stream *input_stream)
{
vis->decoder = decoder;
vis->input_stream = input_stream;
vis->seekable = input_stream->seekable &&
(input_stream->uri == NULL ||
!uri_has_scheme(input_stream->uri));
int ret = ov_open_callbacks(vis, vf, NULL, 0, vorbis_is_callbacks);
if (ret < 0) {
if (decoder == NULL ||
decoder_get_command(decoder) == DECODE_COMMAND_NONE)
g_warning("Failed to open Ogg Vorbis stream: %s",
vorbis_strerror(ret));
return false;
}
return true;
}
int
VorbisDecoder_init(decoders_VorbisDecoder *self, PyObject *args, PyObject *kwds) {
char* filename;
ogg_status ogg_result;
vorbis_status vorbis_result;
self->ogg_stream = NULL;
self->ogg_file = NULL;
self->packet = br_substream_new(BS_LITTLE_ENDIAN);
if (!PyArg_ParseTuple(args, "s", &filename))
goto error;
self->ogg_file = fopen(filename, "rb");
if (self->ogg_file == NULL) {
PyErr_SetFromErrnoWithFilename(PyExc_IOError, filename);
goto error;
} else {
self->ogg_stream = oggreader_open(self->ogg_file);
}
/*read identification packet*/
if ((ogg_result = oggreader_next_packet(self->ogg_stream,
self->packet)) == OGG_OK) {
if ((vorbis_result =
vorbis_read_identification_packet(self->packet,
&(self->identification))) !=
VORBIS_OK) {
PyErr_SetString(vorbis_exception(vorbis_result),
vorbis_strerror(vorbis_result));
goto error;
}
} else {
PyErr_SetString(ogg_exception(ogg_result), ogg_strerror(ogg_result));
goto error;
}
/*skip comments packet, but ensure it's positioned properly*/
if ((ogg_result = oggreader_next_packet(self->ogg_stream,
self->packet)) == OGG_OK) {
if (vorbis_read_common_header(self->packet) != 3) {
PyErr_SetString(PyExc_ValueError,
"comment not second Ogg packet");
goto error;
}
} else {
PyErr_SetString(ogg_exception(ogg_result), ogg_strerror(ogg_result));
goto error;
}
/*read setup header*/
if ((ogg_result = oggreader_next_packet(self->ogg_stream,
self->packet)) == OGG_OK) {
if ((vorbis_result = vorbis_read_setup_packet(self->packet)) !=
VORBIS_OK) {
PyErr_SetString(vorbis_exception(vorbis_result),
vorbis_strerror(vorbis_result));
goto error;
}
} else {
PyErr_SetString(ogg_exception(ogg_result), ogg_strerror(ogg_result));
goto error;
}
return 0;
error:
return -1;
}
