mpd/src/inputPlugins/_flac_common.h

/* the Music Player Daemon (MPD)
 * (c)2003-2006 by Warren Dukes (warren.dukes@gmail.com)
 * This project's homepage is: http://www.musicpd.org
 *
 * Common data structures and functions used by FLAC and OggFLAC
 * (c) 2005 by Eric Wong <normalperson@yhbt.net>
 *
 * 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
 */

#ifndef _FLAC_COMMON_H
#define _FLAC_COMMON_H

#include "../inputPlugin.h"

#if defined(HAVE_FLAC) || defined(HAVE_OGGFLAC)

#include "../tag.h"
#include "../inputStream.h"
#include "../outputBuffer.h"
#include "../decode.h"
#include <FLAC/export.h>
#if !defined(FLAC_API_VERSION_CURRENT) || FLAC_API_VERSION_CURRENT <= 7
#  include <FLAC/seekable_stream_decoder.h>
#  define flac_decoder           FLAC__SeekableStreamDecoder
#  define flac_new(x)            FLAC__seekable_stream_decoder_new(x)

#  define flac_get_decode_position(x,y) \
                 FLAC__seekable_stream_decoder_get_decode_position(x,y)
#  define flac_get_state(x)      FLAC__seekable_stream_decoder_get_state(x)
#  define flac_process_single(x) FLAC__seekable_stream_decoder_process_single(x)
#  define flac_process_metadata(x) \
                 FLAC__seekable_stream_decoder_process_until_end_of_metadata(x)
#  define flac_seek_absolute(x,y) \
                 FLAC__seekable_stream_decoder_seek_absolute(x,y)
#  define flac_finish(x)         FLAC__seekable_stream_decoder_finish(x)
#  define flac_delete(x)         FLAC__seekable_stream_decoder_delete(x)

#  define flac_decoder_eof       FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM

#  define flac_read_status       FLAC__SeekableStreamDecoderReadStatus
#  define flac_read_status_continue \
                                 FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_OK
#  define flac_read_status_eof   FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_OK
#  define flac_read_status_abort \
                               FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_ERROR

#  define flac_seek_status       FLAC__SeekableStreamDecoderSeekStatus
#  define flac_seek_status_ok    FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_OK
#  define flac_seek_status_error FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_ERROR

#  define flac_tell_status         FLAC__SeekableStreamDecoderTellStatus
#  define flac_tell_status_ok      FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_OK
#  define flac_tell_status_error \
                                FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_ERROR
#  define flac_tell_status_unsupported \
                                FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_ERROR

#  define flac_length_status       FLAC__SeekableStreamDecoderLengthStatus
#  define flac_length_status_ok  FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_OK
#  define flac_length_status_error \
                              FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_ERROR
#  define flac_length_status_unsupported \
                              FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_ERROR

#  ifdef HAVE_OGGFLAC
#    include <OggFLAC/seekable_stream_decoder.h>
#  endif
#else /* FLAC_API_VERSION_CURRENT >= 7 */
   /* OggFLAC support is handled by our flac_plugin already */
#  ifdef HAVE_OGGFLAC
#    undef HAVE_OGGFLAC
#  endif
#  include <FLAC/stream_decoder.h>
#  include "_ogg_common.h"
#  define flac_decoder           FLAC__StreamDecoder
#  define flac_new(x)            FLAC__stream_decoder_new(x)

#  define flac_init(a,b,c,d,e,f,g,h,i,j) \
        (FLAC__stream_decoder_init_stream(a,b,c,d,e,f,g,h,i,j) \
         == FLAC__STREAM_DECODER_INIT_STATUS_OK)
#  define flac_get_decode_position(x,y) \
                 FLAC__stream_decoder_get_decode_position(x,y)
#  define flac_get_state(x)      FLAC__stream_decoder_get_state(x)
#  define flac_process_single(x) FLAC__stream_decoder_process_single(x)
#  define flac_process_metadata(x) \
                          FLAC__stream_decoder_process_until_end_of_metadata(x)
#  define flac_seek_absolute(x,y)  FLAC__stream_decoder_seek_absolute(x,y)
#  define flac_finish(x)         FLAC__stream_decoder_finish(x)
#  define flac_delete(x)         FLAC__stream_decoder_delete(x)

#  define flac_decoder_eof       FLAC__STREAM_DECODER_END_OF_STREAM

#  define flac_read_status       FLAC__StreamDecoderReadStatus
#  define flac_read_status_continue \
                                 FLAC__STREAM_DECODER_READ_STATUS_CONTINUE
#  define flac_read_status_eof   FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM
#  define flac_read_status_abort FLAC__STREAM_DECODER_READ_STATUS_ABORT

#  define flac_seek_status       FLAC__StreamDecoderSeekStatus
#  define flac_seek_status_ok    FLAC__STREAM_DECODER_SEEK_STATUS_OK
#  define flac_seek_status_error FLAC__STREAM_DECODER_SEEK_STATUS_ERROR
#  define flac_seek_status_unsupported \
                                 FLAC__STREAM_DECODER_SEEK_STATUS_UNSUPPORTED

#  define flac_tell_status         FLAC__StreamDecoderTellStatus
#  define flac_tell_status_ok      FLAC__STREAM_DECODER_TELL_STATUS_OK
#  define flac_tell_status_error   FLAC__STREAM_DECODER_TELL_STATUS_ERROR
#  define flac_tell_status_unsupported \
                                   FLAC__STREAM_DECODER_TELL_STATUS_UNSUPPORTED

#  define flac_length_status       FLAC__StreamDecoderLengthStatus
#  define flac_length_status_ok    FLAC__STREAM_DECODER_LENGTH_STATUS_OK
#  define flac_length_status_error FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR
#  define flac_length_status_unsupported \
                                 FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED

#endif /* FLAC_API_VERSION_CURRENT >= 7 */

#include <FLAC/metadata.h>

#define FLAC_CHUNK_SIZE 4080

typedef struct {
	unsigned char chunk[FLAC_CHUNK_SIZE];
	int chunk_length;
	float time;
	int bitRate;
	FLAC__uint64 position;
	OutputBuffer *cb;
	DecoderControl *dc;
	InputStream *inStream;
	ReplayGainInfo *replayGainInfo;
	MpdTag *tag;
} FlacData;

/* initializes a given FlacData struct */
void init_FlacData(FlacData * data, OutputBuffer * cb,
		   DecoderControl * dc, InputStream * inStream);
void flac_metadata_common_cb(const FLAC__StreamMetadata * block,
			     FlacData * data);
void flac_error_common_cb(const char *plugin,
			  FLAC__StreamDecoderErrorStatus status,
			  FlacData * data);

MpdTag *copyVorbisCommentBlockToMpdTag(const FLAC__StreamMetadata * block,
				       MpdTag * tag);

/* keep this inlined, this is just macro but prettier :) */
static inline int flacSendChunk(FlacData * data)
{
	if (sendDataToOutputBuffer(data->cb, NULL, data->dc, 1, data->chunk,
				   data->chunk_length, data->time,
				   data->bitRate,
				   data->replayGainInfo) ==
	    OUTPUT_BUFFER_DC_STOP)
		return -1;

	return 0;
}

#endif /* HAVE_FLAC || HAVE_OGGFLAC */

#endif /* _FLAC_COMMON_H */