/* 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 */ #include "flac_decode.h" #ifdef HAVE_FLAC #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; int bitRate; FLAC__uint64 position; Buffer * cb; AudioFormat * af; DecoderControl * dc; char * file; } FlacData; /* this code is based on flac123, from flac-tools */ int flacSendChunk(FlacData * data); 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.position = 0; data.bitRate = 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 = cb->begin; cb->wrap = 0; if(FLAC__file_decoder_seek_absolute(flacDec, sampleToSeek)) { data.time = ((float)sampleToSeek)/ af->sampleRate; data.position = 0; } 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) { my_usleep(10000); } if(data->dc->stop) return -1; if(data->dc->seek) return 0; 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] = data->bitRate; 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; float timeChange; FLAC__uint64 newPosition = 0; timeChange = ((float)samples)/frame->header.sample_rate; data->time+= timeChange; FLAC__file_decoder_get_decode_position(dec,&newPosition); if(data->position) { data->bitRate = ((newPosition-data->position)*8.0/timeChange) /1000+0.5; } data->position = newPosition; 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 getFlacTotalTime(char * file) { float totalTime; AudioFormat af; if(flac_getAudioFormatAndTime(file,&af,&totalTime)<0) return -1; return (int)(totalTime+0.5); } 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