void READMORE(void)
{
if (!FLAC__seekable_stream_decoder_process_single(decoder))
{
fprintf(stderr, "FLAC__seekable_stream_decoder_process_single() failed?\n");
return;
}
if (FLAC__seekable_stream_decoder_get_state(decoder)==FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM)
{
fprintf(stderr, "EOF\n");
return;
}
}
FLAC__SeekableStreamDecoderState FLAC__file_decoder_get_seekable_stream_decoder_state(const FLAC__FileDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
return FLAC__seekable_stream_decoder_get_state(decoder->private_->seekable_stream_decoder);
}
/* 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 FlacPcm::processData(MediaInfo *infos, ChunkList *chunk_list, bool *killswitch)
{
reader = infos->getReader();
if(reader == 0)
return 0;
if(decoder == 0) {
decoder = FLAC__seekable_stream_decoder_new();
if(decoder == 0)
return 0;
FLAC__seekable_stream_decoder_set_md5_checking(decoder, false);
FLAC__seekable_stream_decoder_set_read_callback(decoder, readCallback_);
FLAC__seekable_stream_decoder_set_seek_callback(decoder, seekCallback_);
FLAC__seekable_stream_decoder_set_tell_callback(decoder, tellCallback_);
FLAC__seekable_stream_decoder_set_length_callback(decoder, lengthCallback_);
FLAC__seekable_stream_decoder_set_eof_callback(decoder, eofCallback_);
FLAC__seekable_stream_decoder_set_write_callback(decoder, writeCallback_);
FLAC__seekable_stream_decoder_set_metadata_callback(decoder, metadataCallback_);
FLAC__seekable_stream_decoder_set_error_callback(decoder, errorCallback_);
FLAC__seekable_stream_decoder_set_client_data(decoder, this);
if(FLAC__seekable_stream_decoder_init(decoder) != FLAC__SEEKABLE_STREAM_DECODER_OK) {
cleanup();
return 0;
}
if(!FLAC__seekable_stream_decoder_process_until_end_of_metadata(decoder)) {
cleanup();
return 0;
}
}
if(needs_seek) {
FLAC__seekable_stream_decoder_seek_absolute(decoder, seek_sample);
needs_seek = false;
}
bool eof = false;
while(samples_in_reservoir < 576) {
if(FLAC__seekable_stream_decoder_get_state(decoder) == FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM) {
eof = true;
break;
}
else if(!FLAC__seekable_stream_decoder_process_single(decoder)) {
//@@@ how to do this? MessageBox(mod_.hMainWindow, FLAC__FileDecoderStateString[FLAC__file_decoder_get_state(decoder_)], "READ ERROR processing frame", 0);
eof = true;
break;
}
}
if(samples_in_reservoir == 0) {
eof = true;
}
else {
const unsigned channels = streaminfo.data.stream_info.channels;
const unsigned bits_per_sample = streaminfo.data.stream_info.bits_per_sample;
const unsigned bytes_per_sample = (bits_per_sample+7)/8;
const unsigned sample_rate = streaminfo.data.stream_info.sample_rate;
unsigned i, n = min(samples_in_reservoir, 576), delta;
signed short *ssbuffer = (signed short*)output;
for(i = 0; i < n*channels; i++)
ssbuffer[i] = reservoir[i];
delta = i;
for( ; i < samples_in_reservoir*channels; i++)
reservoir[i-delta] = reservoir[i];
samples_in_reservoir -= n;
const int bytes = n * channels * bytes_per_sample;
ChunkInfosI *ci=new ChunkInfosI();
ci->addInfo("srate", sample_rate);
ci->addInfo("bps", bits_per_sample);
ci->addInfo("nch", channels);
chunk_list->setChunk("PCM", output, bytes, ci);
}
if(eof)
return 0;
return 1;
}
