int
FlacDecoder_init(decoders_FlacDecoder *self,
PyObject *args, PyObject *kwds)
{
char* filename;
int stream_offset = 0;
self->filename = NULL;
self->file = NULL;
self->bitstream = NULL;
self->seektable = array_o_new((ARRAY_COPY_FUNC)seekpoint_copy,
free,
NULL);
self->subframe_data = array_ia_new();
self->residuals = array_i_new();
self->qlp_coeffs = array_i_new();
self->framelist_data = array_i_new();
self->audiotools_pcm = NULL;
self->remaining_samples = 0;
if (!PyArg_ParseTuple(args, "si|i",
&filename,
&(self->channel_mask),
&stream_offset))
return -1;
if (self->channel_mask < 0) {
PyErr_SetString(PyExc_ValueError, "channel_mask must be >= 0");
return -1;
}
if (stream_offset < 0) {
PyErr_SetString(PyExc_ValueError, "stream offset must be >= 0");
return -1;
}
/*open the flac file*/
self->file = fopen(filename, "rb");
if (self->file == NULL) {
PyErr_SetFromErrnoWithFilename(PyExc_IOError, filename);
return -1;
} else {
self->bitstream = br_open(self->file, BS_BIG_ENDIAN);
}
/*skip the given number of bytes, if any*/
if (stream_offset != 0)
fseek(self->file, stream_offset, SEEK_SET);
self->filename = strdup(filename);
/*read the STREAMINFO block, SEEKTABLE block
and setup the total number of samples to read*/
if (flacdec_read_metadata(self->bitstream,
&(self->streaminfo),
self->seektable)) {
self->streaminfo.channels = 0;
return -1;
}
self->remaining_samples = self->streaminfo.total_samples;
/*initialize the output MD5 sum*/
audiotools__MD5Init(&(self->md5));
self->perform_validation = 1;
self->stream_finalized = 0;
/*setup a framelist generator function*/
if ((self->audiotools_pcm = open_audiotools_pcm()) == NULL)
return -1;
/*place mark at beginning of stream in case seeking is needed*/
self->bitstream->mark(self->bitstream);
/*mark stream as not closed and ready for reading*/
self->closed = 0;
return 0;
}
int
FlacDecoder_init(decoders_FlacDecoder *self,
PyObject *args, PyObject *kwds)
{
self->file = NULL;
self->bitstream = NULL;
self->seektable = a_obj_new((ARRAY_COPY_FUNC)seekpoint_copy,
free,
NULL);
self->subframe_data = aa_int_new();
self->residuals = a_int_new();
self->qlp_coeffs = a_int_new();
self->framelist_data = a_int_new();
self->audiotools_pcm = NULL;
self->remaining_samples = 0;
if (!PyArg_ParseTuple(args, "O", &self->file)) {
return -1;
} else {
Py_INCREF(self->file);
}
/*open BitstreamReader from FLAC file stream
based on whether it's a low-level file object*/
if (PyFile_Check(self->file)) {
/*open bitstream through file object*/
self->bitstream = br_open(PyFile_AsFile(self->file), BS_BIG_ENDIAN);
} else {
/*treat file as Python-implemented file-like object*/
self->bitstream = br_open_external(
self->file,
BS_BIG_ENDIAN,
4096,
(ext_read_f)br_read_python,
(ext_close_f)bs_close_python,
(ext_free_f)bs_free_python_nodecref);
}
/*read the STREAMINFO block, SEEKTABLE block
and setup the total number of samples to read*/
if (flacdec_read_metadata(self->bitstream,
&(self->streaminfo),
self->seektable,
&(self->channel_mask))) {
self->streaminfo.channels = 0;
return -1;
}
if (PyFile_Check(self->file)) {
/*place mark at beginning of stream but after metadata
in case seeking is needed*/
self->bitstream->mark(self->bitstream);
}
self->remaining_samples = self->streaminfo.total_samples;
/*initialize the output MD5 sum*/
audiotools__MD5Init(&(self->md5));
self->perform_validation = 1;
self->stream_finalized = 0;
/*setup a framelist generator function*/
if ((self->audiotools_pcm = open_audiotools_pcm()) == NULL)
return -1;
/*mark stream as not closed and ready for reading*/
self->closed = 0;
return 0;
}
