FLACInputStream::~FLACInputStream() {
if (m_decoder) {
FLAC__seekable_stream_decoder_finish(m_decoder);
FLAC__seekable_stream_decoder_delete(m_decoder);
m_decoder = 0;
}
}
FLAC__bool FLAC__file_decoder_finish(FLAC__FileDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
if(decoder->protected_->state == FLAC__FILE_DECODER_UNINITIALIZED)
return true;
FLAC__ASSERT(0 != decoder->private_->seekable_stream_decoder);
if(0 != decoder->private_->file && decoder->private_->file != stdin) {
fclose(decoder->private_->file);
decoder->private_->file = 0;
}
if(0 != decoder->private_->filename) {
free(decoder->private_->filename);
decoder->private_->filename = 0;
}
set_defaults_(decoder);
decoder->protected_->state = FLAC__FILE_DECODER_UNINITIALIZED;
return FLAC__seekable_stream_decoder_finish(decoder->private_->seekable_stream_decoder);
}
void FlacPcm::cleanup()
{
if(decoder) {
FLAC__seekable_stream_decoder_finish(decoder);
FLAC__seekable_stream_decoder_delete(decoder);
decoder = 0;
}
}
FLAC_API void FLAC__seekable_stream_decoder_delete(FLAC__SeekableStreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->protected_);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->private_->stream_decoder);
(void)FLAC__seekable_stream_decoder_finish(decoder);
FLAC__stream_decoder_delete(decoder->private_->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;
}
/* this is the codec entry point */
enum codec_status codec_start(struct codec_api* api)
{
struct codec_api* ci = api;
FLAC__SeekableStreamDecoder* flacDecoder;
FLAC__uint64 offset;
TEST_CODEC_API(ci);
#ifndef SIMULATOR
ci->memcpy(iramstart, iramcopy, iramend-iramstart);
#endif
ci->configure(CODEC_SET_FILEBUF_LIMIT, (int *)(1024*1024*10));
ci->configure(CODEC_SET_FILEBUF_WATERMARK, (int *)(1024*512));
ci->configure(CODEC_SET_FILEBUF_CHUNKSIZE, (int *)(1024*1024));
ci->configure(CODEC_DSP_ENABLE, (bool *)true);
ci->configure(DSP_DITHER, (bool *)false);
ci->configure(DSP_SET_STEREO_MODE, (int *)STEREO_INTERLEAVED);
ci->configure(DSP_SET_SAMPLE_DEPTH, (int *)(16));
next_track:
metadata_length = 0;
seek_table = NULL;
stream_info = NULL;
if (codec_init(api)) {
return CODEC_ERROR;
}
while (!ci->taginfo_ready)
ci->yield();
ci->configure(DSP_SET_FREQUENCY, (long *)(ci->id3->frequency));
codec_set_replaygain(ci->id3);
/* Create a decoder instance */
flacDecoder = FLAC__seekable_stream_decoder_new();
/* Set up the decoder and the callback functions - this must be done before init */
/* The following are required for stream_decoder and higher */
FLAC__seekable_stream_decoder_set_client_data(flacDecoder,ci);
FLAC__seekable_stream_decoder_set_write_callback(flacDecoder, flac_write_handler);
FLAC__seekable_stream_decoder_set_read_callback(flacDecoder, flac_read_handler);
FLAC__seekable_stream_decoder_set_metadata_callback(flacDecoder, flac_metadata_handler);
FLAC__seekable_stream_decoder_set_error_callback(flacDecoder, flac_error_handler);
FLAC__seekable_stream_decoder_set_metadata_respond_all(flacDecoder);
/* The following are only for the seekable_stream_decoder */
FLAC__seekable_stream_decoder_set_seek_callback(flacDecoder, flac_seek_handler);
FLAC__seekable_stream_decoder_set_tell_callback(flacDecoder, flac_tell_handler);
FLAC__seekable_stream_decoder_set_length_callback(flacDecoder, flac_length_handler);
FLAC__seekable_stream_decoder_set_eof_callback(flacDecoder, flac_eof_handler);
/* QUESTION: What do we do when the init fails? */
if (FLAC__seekable_stream_decoder_init(flacDecoder)) {
return CODEC_ERROR;
}
/* The first thing to do is to parse the metadata */
FLAC__seekable_stream_decoder_process_until_end_of_metadata(flacDecoder);
if (ci->id3->offset && stream_info) {
FLAC__uint64 sample;
sample = find_sample_number(ci, ci->id3->offset - metadata_length);
ci->advance_buffer(ci->id3->offset);
FLAC__seekable_stream_decoder_seek_absolute(flacDecoder, sample);
FLAC__seekable_stream_decoder_get_decode_position(flacDecoder, &offset);
ci->set_offset(offset);
samplesdone = (uint32_t)sample;
ci->set_elapsed(sample/(ci->id3->frequency/1000));
} else {
samplesdone = 0;
ci->set_elapsed(0);
}
/* The main decoder loop */
while (FLAC__seekable_stream_decoder_get_state(flacDecoder) != FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM) {
ci->yield();
if (ci->stop_codec || ci->reload_codec) {
break;
}
if (ci->seek_time) {
int sample_loc;
sample_loc = ci->seek_time/1000 * ci->id3->frequency;
if (FLAC__seekable_stream_decoder_seek_absolute(flacDecoder, sample_loc)) {
samplesdone = sample_loc;
ci->set_elapsed(samplesdone/(ci->id3->frequency/1000));
}
ci->seek_time = 0;
}
FLAC__seekable_stream_decoder_process_single(flacDecoder);
FLAC__seekable_stream_decoder_get_decode_position(flacDecoder, &offset);
ci->set_offset(offset);
}
/* Flush the libFLAC buffers */
FLAC__seekable_stream_decoder_finish(flacDecoder);
if (ci->request_next_track()) {
if (stream_info) {
FLAC__metadata_object_delete(stream_info);
}
if (seek_table) {
FLAC__metadata_object_delete(seek_table);
}
metadata_length = 0;
goto next_track;
}
return CODEC_OK;
}
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;
}