/* 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 "../inputPlugin.h" #ifdef HAVE_FLAC #include "../utils.h" #include "../log.h" #include "../pcm_utils.h" #include "../inputStream.h" #include "../outputBuffer.h" #include "../replayGain.h" #include "../audio.h" #include <stdio.h> #include <string.h> #include <unistd.h> #include <FLAC/seekable_stream_decoder.h> #include <FLAC/metadata.h> typedef struct { #define FLAC_CHUNK_SIZE 4080 unsigned char chunk[FLAC_CHUNK_SIZE]; int chunk_length; float time; int bitRate; FLAC__uint64 position; OutputBuffer * cb; DecoderControl * dc; InputStream inStream; float replayGainScale; char * path; } FlacData; /* this code is based on flac123, from flac-tools */ int flacSendChunk(FlacData * data); void flacError(const FLAC__SeekableStreamDecoder *, FLAC__StreamDecoderErrorStatus, void *); void flacPrintErroredState(FLAC__SeekableStreamDecoderState state, char * file); void flacMetadata(const FLAC__SeekableStreamDecoder *, const FLAC__StreamMetadata *, void *); FLAC__StreamDecoderWriteStatus flacWrite(const FLAC__SeekableStreamDecoder *, const FLAC__Frame *, const FLAC__int32 * const buf[], void *); FLAC__SeekableStreamDecoderReadStatus flacRead( const FLAC__SeekableStreamDecoder *, FLAC__byte buf[], unsigned *, void *); FLAC__SeekableStreamDecoderSeekStatus flacSeek( const FLAC__SeekableStreamDecoder *, FLAC__uint64, void *); FLAC__SeekableStreamDecoderTellStatus flacTell( const FLAC__SeekableStreamDecoder *, FLAC__uint64 *, void *); FLAC__SeekableStreamDecoderLengthStatus flacLength( const FLAC__SeekableStreamDecoder *, FLAC__uint64 *, void *); FLAC__bool flacEOF(const FLAC__SeekableStreamDecoder *, void *); int flac_decode(OutputBuffer * cb, DecoderControl *dc, char * path) { FLAC__SeekableStreamDecoder * flacDec; FlacData data; int status = 1; data.chunk_length = 0; data.time = 0; data.position = 0; data.bitRate = 0; data.cb = cb; data.dc = dc; data.replayGainScale = 1.0; data.path = path; if(openInputStream(&(data.inStream), path)<0) { ERROR("unable to open flac: %s\n", path); return -1; } if(!(flacDec = FLAC__seekable_stream_decoder_new())) return -1; /*status&=FLAC__file_decoder_set_md5_checking(flacDec,1);*/ status&=FLAC__seekable_stream_decoder_set_read_callback(flacDec, flacRead); status&=FLAC__seekable_stream_decoder_set_seek_callback(flacDec, flacSeek); status&=FLAC__seekable_stream_decoder_set_tell_callback(flacDec, flacTell); status&=FLAC__seekable_stream_decoder_set_length_callback(flacDec, flacLength); status&=FLAC__seekable_stream_decoder_set_eof_callback(flacDec,flacEOF); status&=FLAC__seekable_stream_decoder_set_write_callback(flacDec, flacWrite); status&=FLAC__seekable_stream_decoder_set_metadata_callback(flacDec, flacMetadata); status&=FLAC__seekable_stream_decoder_set_error_callback(flacDec, flacError); status&=FLAC__seekable_stream_decoder_set_client_data(flacDec, (void *)&data); if(!status) { ERROR("flac problem before init(): %s\n", path); flacPrintErroredState( FLAC__seekable_stream_decoder_get_state(flacDec), path); FLAC__seekable_stream_decoder_delete(flacDec); return -1; } if(FLAC__seekable_stream_decoder_init(flacDec)!= FLAC__STREAM_DECODER_SEARCH_FOR_METADATA) { ERROR("flac problem doing init(): %s\n", path); flacPrintErroredState( FLAC__seekable_stream_decoder_get_state(flacDec), path); FLAC__seekable_stream_decoder_delete(flacDec); return -1; } if(!FLAC__seekable_stream_decoder_process_until_end_of_metadata(flacDec)) { ERROR("flac problem reading metadata: %s\n", path); flacPrintErroredState( FLAC__seekable_stream_decoder_get_state(flacDec), path); FLAC__seekable_stream_decoder_delete(flacDec); return -1; } dc->state = DECODE_STATE_DECODE; while(1) { FLAC__seekable_stream_decoder_process_single(flacDec); if(FLAC__seekable_stream_decoder_get_state(flacDec)!= FLAC__SEEKABLE_STREAM_DECODER_OK) { break; } if(dc->seek) { FLAC__uint64 sampleToSeek = dc->seekWhere* dc->audioFormat.sampleRate+0.5; if(FLAC__seekable_stream_decoder_seek_absolute(flacDec, sampleToSeek)) { clearOutputBuffer(cb); data.time = ((float)sampleToSeek)/ dc->audioFormat.sampleRate; data.position = 0; } else dc->seekError = 1; dc->seek = 0; } } /* I don't think we need this bit here! -shank */ /*FLAC__file_decoder_process_until_end_of_file(flacDec);*/ if(!dc->stop) { flacPrintErroredState( FLAC__seekable_stream_decoder_get_state(flacDec), path); FLAC__seekable_stream_decoder_finish(flacDec); } FLAC__seekable_stream_decoder_delete(flacDec); /* send last little bit */ if(data.chunk_length>0 && !dc->stop) { flacSendChunk(&data); flushOutputBuffer(data.cb); } /*if(dc->seek) { dc->seekError = 1; dc->seek = 0; } */ if(dc->stop) { dc->state = DECODE_STATE_STOP; dc->stop = 0; } else dc->state = DECODE_STATE_STOP; return 0; } FLAC__SeekableStreamDecoderReadStatus flacRead( const FLAC__SeekableStreamDecoder * flacDec, FLAC__byte buf[], unsigned * bytes, void * fdata) { FlacData * data = (FlacData *) fdata; *bytes = readFromInputStream(&(data->inStream),(void *)buf,1,*bytes); if(*bytes==0) return FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_ERROR; return FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_OK; } FLAC__SeekableStreamDecoderSeekStatus flacSeek( const FLAC__SeekableStreamDecoder * flacDec, FLAC__uint64 offset, void * fdata) { FlacData * data = (FlacData *) fdata; if(seekInputStream(&(data->inStream),offset,SEEK_SET)<0) { return FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_ERROR; } return FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_OK; } FLAC__SeekableStreamDecoderTellStatus flacTell( const FLAC__SeekableStreamDecoder * flacDec, FLAC__uint64 * offset, void * fdata) { FlacData * data = (FlacData *) fdata; *offset = data->inStream.offset; return FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_OK; } FLAC__SeekableStreamDecoderLengthStatus flacLength( const FLAC__SeekableStreamDecoder * flacDec, FLAC__uint64 * length, void * fdata) { FlacData * data = (FlacData *) fdata; *length = data->inStream.size; return FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_OK; } FLAC__bool flacEOF(const FLAC__SeekableStreamDecoder * flacDec, void * fdata) { FlacData * data = (FlacData *) fdata; switch(inputStreamAtEOF(&(data->inStream))) { case 1: return true; default: return false; } } void flacError(const FLAC__SeekableStreamDecoder *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->path); break; case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER: ERROR("bad header %s\n", data->path); break; case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH: ERROR("crc mismatch %s\n", data->path); break; default: ERROR("unknow flac error %s\n", data->path); } } void flacPrintErroredState(FLAC__SeekableStreamDecoderState state, char * file) { switch(state) { case FLAC__SEEKABLE_STREAM_DECODER_MEMORY_ALLOCATION_ERROR: ERROR("flac allocation error\n"); break; case FLAC__SEEKABLE_STREAM_DECODER_READ_ERROR: ERROR("flac read error: %s\n",file); break; case FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR: ERROR("flac seek error: %s\n",file); break; case FLAC__SEEKABLE_STREAM_DECODER_STREAM_DECODER_ERROR: ERROR("flac seekable stream error: %s\n",file); break; case FLAC__SEEKABLE_STREAM_DECODER_ALREADY_INITIALIZED: ERROR("flac decoder already initilaized: %s\n",file); break; case FLAC__SEEKABLE_STREAM_DECODER_INVALID_CALLBACK: ERROR("invalid flac callback\n"); break; case FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED: ERROR("flac decoder uninitialized: %s\n",file); break; case FLAC__SEEKABLE_STREAM_DECODER_OK: case FLAC__SEEKABLE_STREAM_DECODER_SEEKING: case FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM: break; } } int flacFindVorbisCommentFloat(const FLAC__StreamMetadata * block, char * cmnt, float * fl) { int offset = FLAC__metadata_object_vorbiscomment_find_entry_from( block,0,cmnt); if(offset >= 0) { int pos = strlen(cmnt)+1; /* 1 is for '=' */ int len = block->data.vorbis_comment.comments[offset].length -pos; if(len > 0) { char * dup = malloc(len+1); memcpy(dup,&(block->data.vorbis_comment.comments[offset].entry[pos]),len); dup[len] = '\0'; *fl = atof(dup); free(dup); return 1; } } return 0; } /* replaygain stuff by AliasMrJones */ void flacParseReplayGain(const FLAC__StreamMetadata *block, FlacData * data) { int found; float gain = 0.0; float peak = 0.0; int state = getReplayGainState(); if(state == REPLAYGAIN_OFF) return; found = flacFindVorbisCommentFloat(block,"replaygain_album_gain",&gain); if(found) { flacFindVorbisCommentFloat(block,"replaygain_album_peak", &peak); } if(!found || state == REPLAYGAIN_TRACK) { if(flacFindVorbisCommentFloat(block,"replaygain_track_gain", &gain)) { peak = 0.0; flacFindVorbisCommentFloat(block, "replaygain_track_peak",&peak); } } data->replayGainScale = computeReplayGainScale(gain,peak); } void flacMetadata(const FLAC__SeekableStreamDecoder *dec, const FLAC__StreamMetadata *block, void *vdata) { FlacData * data = (FlacData *)vdata; switch(block->type) { case FLAC__METADATA_TYPE_STREAMINFO: data->dc->audioFormat.bits = block->data.stream_info.bits_per_sample; data->dc->audioFormat.sampleRate = block->data.stream_info.sample_rate; data->dc->audioFormat.channels = block->data.stream_info.channels; data->dc->totalTime = ((float)block->data.stream_info.total_samples)/ data->dc->audioFormat.sampleRate; getOutputAudioFormat(&(data->dc->audioFormat), &(data->cb->audioFormat)); break; case FLAC__METADATA_TYPE_VORBIS_COMMENT: flacParseReplayGain(block,data); default: break; } } int flacSendChunk(FlacData * data) { doReplayGain(data->chunk,data->chunk_length,&(data->dc->audioFormat), data->replayGainScale); switch(sendDataToOutputBuffer(data->cb, NULL, data->dc, 1, data->chunk, data->chunk_length, data->time, data->bitRate)) { case OUTPUT_BUFFER_DC_STOP: return -1; default: return 0; } return 0; } FLAC__StreamDecoderWriteStatus flacWrite(const FLAC__SeekableStreamDecoder *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__seekable_stream_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->dc->audioFormat.bits/8);i++) { if(data->chunk_length>=FLAC_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; } MpdTag * flacMetadataDup(char * file, int * vorbisCommentFound) { MpdTag * ret = NULL; FLAC__Metadata_SimpleIterator * it; FLAC__StreamMetadata * block = NULL; int offset; int len, pos; *vorbisCommentFound = 0; it = FLAC__metadata_simple_iterator_new(); if(!FLAC__metadata_simple_iterator_init(it, file ,1,0)) { FLAC__metadata_simple_iterator_delete(it); return ret; } do { block = FLAC__metadata_simple_iterator_get_block(it); if(!block) break; if(block->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) { char * dup; offset = FLAC__metadata_object_vorbiscomment_find_entry_from(block,0,"artist"); if(offset>=0) { *vorbisCommentFound = 1; if(!ret) ret = newMpdTag(); pos = strlen("artist="); len = block->data.vorbis_comment.comments[offset].length-pos; if(len>0) { dup = malloc(len+1); memcpy(dup,&(block->data.vorbis_comment.comments[offset].entry[pos]),len); dup[len] = '\0'; ret->artist = dup; } } offset = FLAC__metadata_object_vorbiscomment_find_entry_from(block,0,"album"); if(offset>=0) { *vorbisCommentFound = 1; if(!ret) ret = newMpdTag(); pos = strlen("album="); len = block->data.vorbis_comment.comments[offset].length-pos; if(len>0) { dup = malloc(len+1); memcpy(dup,&(block->data.vorbis_comment.comments[offset].entry[pos]),len); dup[len] = '\0'; ret->album = dup; } } offset = FLAC__metadata_object_vorbiscomment_find_entry_from(block,0,"title"); if(offset>=0) { *vorbisCommentFound = 1; if(!ret) ret = newMpdTag(); pos = strlen("title="); len = block->data.vorbis_comment.comments[offset].length-pos; if(len>0) { dup = malloc(len+1); memcpy(dup,&(block->data.vorbis_comment.comments[offset].entry[pos]),len); dup[len] = '\0'; ret->title = dup; } } offset = FLAC__metadata_object_vorbiscomment_find_entry_from(block,0,"tracknumber"); if(offset>=0) { *vorbisCommentFound = 1; if(!ret) ret = newMpdTag(); pos = strlen("tracknumber="); len = block->data.vorbis_comment.comments[offset].length-pos; if(len>0) { dup = malloc(len+1); memcpy(dup,&(block->data.vorbis_comment.comments[offset].entry[pos]),len); dup[len] = '\0'; ret->track = dup; } } } else if(block->type == FLAC__METADATA_TYPE_STREAMINFO) { if(!ret) ret = newMpdTag(); ret->time = ((float)block->data.stream_info. total_samples) / block->data.stream_info.sample_rate + 0.5; } FLAC__metadata_object_delete(block); } while(FLAC__metadata_simple_iterator_next(it)); FLAC__metadata_simple_iterator_delete(it); return ret; } MpdTag * flacTagDup(char * file) { MpdTag * ret = NULL; int foundVorbisComment = 0; ret = flacMetadataDup(file, &foundVorbisComment); if(!ret) return NULL; if(!foundVorbisComment) { MpdTag * temp = id3Dup(file); if(temp) { temp->time = ret->time; freeMpdTag(ret); ret = temp; } } return ret; } char * flacSuffixes[] = {"flac", NULL}; InputPlugin flacPlugin = { "flac", NULL, NULL, NULL, flac_decode, flacTagDup, INPUT_PLUGIN_STREAM_FILE, flacSuffixes, NULL }; #else InputPlugin flacPlugin = { NULL, NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, }; #endif /* vim:set shiftwidth=8 tabstop=8 expandtab: */