/* the Music Player Daemon (MPD)
* (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
* This project's homepage is: http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_FLAC
#include "flac_decode.h"
#include "utils.h"
#include "log.h"
#include "pcm_utils.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <FLAC/file_decoder.h>
#include <FLAC/metadata.h>
typedef struct {
unsigned char chunk[CHUNK_SIZE];
int chunk_length;
float time;
Buffer * cb;
AudioFormat * af;
DecoderControl * dc;
char * file;
} FlacData;
/* this code is based on flac123, from flac-tools */
int flacSendChunk(FlacData * data);
void flacPlayfile(const char * file, Buffer * cb, ao_sample_format * format);
void flacError(const FLAC__FileDecoder *, FLAC__StreamDecoderErrorStatus, void *);
void flacPrintErroredState(FLAC__FileDecoderState state, char * file);
void flacMetadata(const FLAC__FileDecoder *, const FLAC__StreamMetadata *, void *);
FLAC__StreamDecoderWriteStatus flacWrite(const FLAC__FileDecoder *, const FLAC__Frame *, const FLAC__int32 * const buf[], void *);
void flacPlayFile(char *file, Buffer * cb, AudioFormat * af,
DecoderControl *dc)
{
FLAC__FileDecoder * flacDec;
FlacData data;
int status = 1;
data.chunk_length = 0;
data.time = 0;
data.cb = cb;
data.af = af;
data.dc = dc;
data.file = file;
if(!(flacDec = FLAC__file_decoder_new())) return;
/*status&=FLAC__file_decoder_set_md5_checking(flacDec,1);*/
status&=FLAC__file_decoder_set_filename(flacDec,file);
status&=FLAC__file_decoder_set_write_callback(flacDec,flacWrite);
status&=FLAC__file_decoder_set_metadata_callback(flacDec,flacMetadata);
status&=FLAC__file_decoder_set_error_callback(flacDec,flacError);
status&=FLAC__file_decoder_set_client_data(flacDec, (void *)&data);
if(!status) {
ERROR("flac problem before init(): %s\n",file);
flacPrintErroredState(FLAC__file_decoder_get_state(flacDec),file);
FLAC__file_decoder_delete(flacDec);
return;
}
if(FLAC__file_decoder_init(flacDec)!=
FLAC__STREAM_DECODER_SEARCH_FOR_METADATA)
{
ERROR("flac problem doing init(): %s\n",file);
flacPrintErroredState(FLAC__file_decoder_get_state(flacDec),file);
FLAC__file_decoder_delete(flacDec);
return;
}
if(!FLAC__file_decoder_process_until_end_of_metadata(flacDec)) {
ERROR("flac problem reading metadata: %s\n",file);
flacPrintErroredState(FLAC__file_decoder_get_state(flacDec),file);
FLAC__file_decoder_delete(flacDec);
return;
}
while(1) {
FLAC__file_decoder_process_single(flacDec);
if(FLAC__file_decoder_get_state(flacDec)!=
FLAC__FILE_DECODER_OK)
{
break;
}
if(dc->seek) {
FLAC__uint64 sampleToSeek = dc->seekWhere*
af->sampleRate+0.5;
cb->end = 0;
cb->wrap = 0;
if(FLAC__file_decoder_seek_absolute(flacDec,
sampleToSeek))
{
data.time = ((float)sampleToSeek)/
af->sampleRate;
}
dc->seek = 0;
}
}
FLAC__file_decoder_process_until_end_of_file(flacDec);
if(!dc->stop) {
flacPrintErroredState(FLAC__file_decoder_get_state(flacDec),
file);
FLAC__file_decoder_finish(flacDec);
}
FLAC__file_decoder_delete(flacDec);
/* send last little bit */
if(data.chunk_length>0 && !dc->stop) flacSendChunk(&data);
}
void flacError(const FLAC__FileDecoder *dec, FLAC__StreamDecoderErrorStatus status, void *fdata) {
FlacData * data = (FlacData *) fdata;
if(data->dc->stop) return;
switch(status) {
case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC:
ERROR("flac lost sync: %s\n",data->file);
break;
case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER:
ERROR("bad header %s\n",data->file);
break;
case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH:
ERROR("crc mismatch %s\n",data->file);
break;
default:
ERROR("unknow flac error %s\n",data->file);
}
}
void flacPrintErroredState(FLAC__FileDecoderState state, char * file) {
switch(state) {
case FLAC__FILE_DECODER_ERROR_OPENING_FILE:
ERROR("error opening flac: %s\n",file);
break;
case FLAC__FILE_DECODER_MEMORY_ALLOCATION_ERROR:
ERROR("flac allocation error\n");
break;
case FLAC__FILE_DECODER_SEEK_ERROR:
ERROR("flac seek error: %s\n",file);
break;
case FLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR:
ERROR("flac seekable stream error: %s\n",file);
break;
case FLAC__FILE_DECODER_ALREADY_INITIALIZED:
ERROR("flac decoder already initilaized: %s\n",file);
break;
case FLAC__FILE_DECODER_INVALID_CALLBACK:
ERROR("invalid flac callback\n");
break;
case FLAC__FILE_DECODER_UNINITIALIZED:
ERROR("flac decoder uninitialized: %s\n",file);
break;
case FLAC__FILE_DECODER_OK:
case FLAC__FILE_DECODER_END_OF_FILE:
break;
}
}
void flacMetadata(const FLAC__FileDecoder *dec, const FLAC__StreamMetadata *meta, void *data) {
}
int flacSendChunk(FlacData * data) {
while(data->cb->begin==data->cb->end && data->cb->wrap &&
!data->dc->stop && !data->dc->seek)
{
usleep(1000);
}
if(data->dc->stop) return -1;
if(data->dc->seek) return 0;
#ifdef WORDS_BIGENDIAN
pcm_changeBufferEndianness(chunk,CHUNK_SIZE,data->af->bits);
#endif
memcpy(data->cb->chunks+data->cb->end*CHUNK_SIZE,data->chunk,
CHUNK_SIZE);
data->cb->chunkSize[data->cb->end] = data->chunk_length;
data->cb->times[data->cb->end] = data->time;
data->cb->bitRate[data->cb->end] = 0;
data->cb->end++;
if(data->cb->end>=BUFFERED_CHUNKS) {
data->cb->end = 0;
data->cb->wrap = 1;
}
return 0;
}
FLAC__StreamDecoderWriteStatus flacWrite(const FLAC__FileDecoder *dec, const FLAC__Frame *frame, const FLAC__int32 * const buf[], void * vdata) {
FlacData * data = (FlacData *)vdata;
FLAC__uint32 samples = frame->header.blocksize;
FLAC__uint16 u16;
unsigned char * uc;
int c_samp, c_chan, d_samp;
int i;
data->time+=((float)samples)/frame->header.sample_rate;
for(c_samp = d_samp = 0; c_samp < frame->header.blocksize; c_samp++) {
for(c_chan = 0; c_chan < frame->header.channels;
c_chan++, d_samp++) {
u16 = buf[c_chan][c_samp];
uc = (unsigned char *)&u16;
for(i=0;i<(data->af->bits/8);i++) {
if(data->chunk_length>=CHUNK_SIZE) {
if(flacSendChunk(data)<0) {
return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
}
data->chunk_length = 0;
if(data->dc->seek) {
return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
}
}
data->chunk[data->chunk_length++] = *(uc++);
}
}
}
return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
}
int flac_getAudioFormatAndTime(char * file, AudioFormat * format, float * time) {
FLAC__Metadata_SimpleIterator * it;
FLAC__StreamMetadata * block = NULL;
int found = 0;
int ret = -1;
if(!(it = FLAC__metadata_simple_iterator_new())) return -1;
if(!FLAC__metadata_simple_iterator_init(it,file,1,0)) {
FLAC__metadata_simple_iterator_delete(it);
return -1;
}
do {
if(block) FLAC__metadata_object_delete(block);
block = FLAC__metadata_simple_iterator_get_block(it);
if(block->type == FLAC__METADATA_TYPE_STREAMINFO) found=1;
} while(!found && FLAC__metadata_simple_iterator_next(it));
if(found) {
format->bits = block->data.stream_info.bits_per_sample;
format->bits = 16;
format->sampleRate = block->data.stream_info.sample_rate;
format->channels = block->data.stream_info.channels;
*time = ((float)block->data.stream_info.total_samples)/
format->sampleRate;
ret = 0;
}
if(block) FLAC__metadata_object_delete(block);
FLAC__metadata_simple_iterator_delete(it);
return ret;
}
int flac_decode(Buffer * cb, AudioFormat * af, DecoderControl * dc) {
if(flac_getAudioFormatAndTime(dc->file,af,&(cb->totalTime))<0) {
ERROR("\"%s\" doesn't seem to be a flac\n",dc->file);
return -1;
}
dc->state = DECODE_STATE_DECODE;
dc->start = 0;
flacPlayFile(dc->file,cb,af,dc);
if(dc->seek) dc->seek = 0;
if(dc->stop) {
dc->state = DECODE_STATE_STOP;
dc->stop = 0;
}
else dc->state = DECODE_STATE_STOP;
return 0;
}
#endif
