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-rw-r--r--src/inputPlugins/flac_plugin.c580
1 files changed, 580 insertions, 0 deletions
diff --git a/src/inputPlugins/flac_plugin.c b/src/inputPlugins/flac_plugin.c
new file mode 100644
index 000000000..23e2bcfea
--- /dev/null
+++ b/src/inputPlugins/flac_plugin.c
@@ -0,0 +1,580 @@
+/* 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 "../path.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;
+}
+
+MpdTag * flacMetadataDup(char * utf8file, 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,rmp2amp(utf8ToFsCharset(utf8file)),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';
+ stripReturnChar(dup);
+ 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';
+ stripReturnChar(dup);
+ 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';
+ stripReturnChar(dup);
+ 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';
+ stripReturnChar(dup);
+ 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 * utf8file) {
+ MpdTag * ret = NULL;
+ int foundVorbisComment = 0;
+
+ ret = flacMetadataDup(utf8file,&foundVorbisComment);
+ if(!ret) return NULL;
+ if(!foundVorbisComment) {
+ MpdTag * temp = id3Dup(utf8file);
+ if(temp) {
+ temp->time = ret->time;
+ freeMpdTag(ret);
+ ret = temp;
+ }
+ }
+
+ if(ret) validateUtf8Tag(ret);
+
+ return ret;
+}
+
+char * flacSuffixes[] = {"flac", NULL};
+
+InputPlugin flacPlugin =
+{
+ "flac",
+ NULL,
+ flac_decode,
+ flacTagDup,
+ INPUT_PLUGIN_STREAM_FILE,
+ flacSuffixes,
+ NULL
+};
+
+#else
+
+InputPlugin flacPlugin =
+{
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ 0,
+ NULL,
+ NULL,
+};
+
+#endif
+/* vim:set shiftwidth=8 tabstop=8 expandtab: */