diff options
Diffstat (limited to 'src/flac_decode.c')
| -rw-r--r-- | src/flac_decode.c | 441 |
1 files changed, 0 insertions, 441 deletions
diff --git a/src/flac_decode.c b/src/flac_decode.c deleted file mode 100644 index a5af3e132..000000000 --- a/src/flac_decode.c +++ /dev/null @@ -1,441 +0,0 @@ -/* 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 "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; -} 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) { - 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; - - if(openInputStream(&(data.inStream),dc->file)<0) { - ERROR("unable to open flac: %s\n",dc->file); - 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",dc->file); - flacPrintErroredState( - FLAC__seekable_stream_decoder_get_state(flacDec), - dc->file); - 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",dc->file); - flacPrintErroredState( - FLAC__seekable_stream_decoder_get_state(flacDec), - dc->file); - 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", dc->file); - flacPrintErroredState( - FLAC__seekable_stream_decoder_get_state(flacDec), - dc->file); - 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), - dc->file); - 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->dc->file); - break; - case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER: - ERROR("bad header %s\n",data->dc->file); - break; - case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH: - ERROR("crc mismatch %s\n",data->dc->file); - break; - default: - ERROR("unknow flac error %s\n",data->dc->file); - } -} - -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; -} - -#endif -/* vim:set shiftwidth=8 tabstop=8 expandtab: */ |