import from SF CVS

git-svn-id: https://svn.musicpd.org/mpd/trunk@1 09075e82-0dd4-0310-85a5-a0d7c8717e4f

1 files changed, 292 insertions, 0 deletions

diff --git a/src/flac_decode.c b/src/flac_decode.c
new file mode 100644
index 000000000..5f7ac428f
--- /dev/null
+++ b/src/flac_decode.c
@@ -0,0 +1,292 @@
+/* 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