FLACInputStream::~FLACInputStream() {
if (m_decoder) {
FLAC__seekable_stream_decoder_finish(m_decoder);
FLAC__seekable_stream_decoder_delete(m_decoder);
m_decoder = 0;
}
}
void FlacPcm::cleanup()
{
if(decoder) {
FLAC__seekable_stream_decoder_finish(decoder);
FLAC__seekable_stream_decoder_delete(decoder);
decoder = 0;
}
}
void FLAC__file_decoder_delete(FLAC__FileDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->protected_);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->private_->seekable_stream_decoder);
(void)FLAC__file_decoder_finish(decoder);
FLAC__seekable_stream_decoder_delete(decoder->private_->seekable_stream_decoder);
free(decoder->private_);
free(decoder->protected_);
free(decoder);
}
bool
FLACInputStream::initialize(FilePtr file) {
m_file = file;
// initialize the decoder
m_decoder = FLAC__seekable_stream_decoder_new();
if (!m_decoder) {
m_file = 0;
return false;
}
#define SET_CALLBACK(name) \
FLAC__seekable_stream_decoder_set_##name##_callback( \
m_decoder, \
name##_callback)
// set callbacks
FLAC__seekable_stream_decoder_set_client_data (m_decoder, this);
SET_CALLBACK(read);
SET_CALLBACK(seek);
SET_CALLBACK(tell);
SET_CALLBACK(length);
SET_CALLBACK(eof);
SET_CALLBACK(write);
SET_CALLBACK(metadata);
SET_CALLBACK(error);
FLAC__SeekableStreamDecoderState state =
FLAC__seekable_stream_decoder_init(m_decoder);
if (state != FLAC__SEEKABLE_STREAM_DECODER_OK) {
FLAC__seekable_stream_decoder_finish(m_decoder);
FLAC__seekable_stream_decoder_delete(m_decoder);
m_decoder = 0;
m_file = 0;
return false;
}
// make sure we have metadata before we return!
if (!FLAC__seekable_stream_decoder_process_until_end_of_metadata(m_decoder)) {
FLAC__seekable_stream_decoder_finish(m_decoder);
FLAC__seekable_stream_decoder_delete(m_decoder);
m_decoder = 0;
m_file = 0;
return false;
}
// process one frame so we can do something!
if (!FLAC__seekable_stream_decoder_process_single(m_decoder)) {
FLAC__seekable_stream_decoder_finish(m_decoder);
FLAC__seekable_stream_decoder_delete(m_decoder);
m_decoder = 0;
m_file = 0;
return false;
}
// get info about the flac file
m_channel_count = FLAC__seekable_stream_decoder_get_channels(m_decoder);
m_sample_rate = FLAC__seekable_stream_decoder_get_sample_rate(m_decoder);
int bps = FLAC__seekable_stream_decoder_get_bits_per_sample(m_decoder);
if (bps == 16) {
m_sample_format = SF_S16;
} else if (bps == 8) {
m_sample_format = SF_U8;
} else {
return false;
}
return true;
}
int main(int argc, char *argv[])
{
if (argc!=2)
{
fprintf(stderr, "usage: %s flacfile\n", argv[0]);
return -1;
}
myfile = fopen(argv[1], "ro");
if (!myfile)
{
perror("fopen()");
return -1;
}
decoder = FLAC__seekable_stream_decoder_new();
if (!decoder)
{
fprintf(stderr, "FLAC__seekable_stream_decoder_new() failed, out of memory?\n");
return 1;
}
FLAC__seekable_stream_decoder_set_md5_checking(decoder, 0);
FLAC__seekable_stream_decoder_set_read_callback(decoder, read_callback);
FLAC__seekable_stream_decoder_set_write_callback(decoder, write_callback);
FLAC__seekable_stream_decoder_set_metadata_callback(decoder, metadata_callback);
FLAC__seekable_stream_decoder_set_seek_callback(decoder, seek_callback);
FLAC__seekable_stream_decoder_set_tell_callback(decoder, tell_callback);
FLAC__seekable_stream_decoder_set_length_callback(decoder, length_callback);
FLAC__seekable_stream_decoder_set_eof_callback(decoder, eof_callback);
FLAC__seekable_stream_decoder_set_client_data(decoder, myvar);
FLAC__seekable_stream_decoder_set_error_callback(decoder, error_callback);
switch (FLAC__seekable_stream_decoder_init(decoder))
{
case FLAC__SEEKABLE_STREAM_DECODER_OK:
fprintf(stderr, "init ok\n");
break;
case FLAC__SEEKABLE_STREAM_DECODER_SEEKING:
fprintf(stderr, "seeking\n");
break;
case FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM:
fprintf(stderr, "eof\n");
break;
case FLAC__SEEKABLE_STREAM_DECODER_MEMORY_ALLOCATION_ERROR:
fprintf(stderr, "malloc failed\n");
break;
case FLAC__SEEKABLE_STREAM_DECODER_STREAM_DECODER_ERROR:
fprintf(stderr, "decoder error\n");
break;
case FLAC__SEEKABLE_STREAM_DECODER_READ_ERROR:
fprintf(stderr, "read error\n");
break;
case FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR:
fprintf(stderr, "seek error\n");
break;
case FLAC__SEEKABLE_STREAM_DECODER_ALREADY_INITIALIZED:
fprintf(stderr, "already init'ed\n");
break;
case FLAC__SEEKABLE_STREAM_DECODER_INVALID_CALLBACK:
fprintf(stderr, "invalid callback\n");
break;
case FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED:
fprintf(stderr, "decoder uninted\n");
break;
default:
fprintf(stderr, "init not ok\n");
break;
}
FLAC__seekable_stream_decoder_process_until_end_of_metadata(decoder);
FLAC__seekable_stream_decoder_process_single(decoder);
fprintf(stderr, "channels=%d\n", FLAC__seekable_stream_decoder_get_channels(decoder));
fprintf(stderr, "bits per sample=%d\n", FLAC__seekable_stream_decoder_get_bits_per_sample(decoder));
/*
fprintf(stderr, "position=%d\n", FLAC__seekable_stream_decoder_get_decode_position(decoder));
*/
FLAC__seekable_stream_decoder_finish(decoder);
FLAC__seekable_stream_decoder_delete(decoder);
fclose(myfile);
return 0;
}