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/*
* Copyright (C) 2003-2009 The Music Player Daemon Project
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* Common data structures and functions used by FLAC and OggFLAC
*/
#include "_flac_common.h"
#include "flac_metadata.h"
#include "flac_pcm.h"
#include <glib.h>
#include <assert.h>
void
flac_data_init(struct flac_data *data, struct decoder * decoder,
struct input_stream *input_stream)
{
pcm_buffer_init(&data->buffer);
data->time = 0;
data->position = 0;
data->bit_rate = 0;
data->decoder = decoder;
data->input_stream = input_stream;
data->replay_gain_info = NULL;
data->tag = NULL;
}
void
flac_data_deinit(struct flac_data *data)
{
pcm_buffer_deinit(&data->buffer);
if (data->replay_gain_info != NULL)
replay_gain_info_free(data->replay_gain_info);
if (data->tag != NULL)
tag_free(data->tag);
}
void flac_metadata_common_cb(const FLAC__StreamMetadata * block,
struct flac_data *data)
{
const FLAC__StreamMetadata_StreamInfo *si = &(block->data.stream_info);
switch (block->type) {
case FLAC__METADATA_TYPE_STREAMINFO:
audio_format_init(&data->audio_format, si->sample_rate,
si->bits_per_sample, si->channels);
data->total_time = ((float)si->total_samples) / (si->sample_rate);
break;
case FLAC__METADATA_TYPE_VORBIS_COMMENT:
if (data->replay_gain_info)
replay_gain_info_free(data->replay_gain_info);
data->replay_gain_info = flac_parse_replay_gain(block);
if (data->tag != NULL)
flac_vorbis_comments_to_tag(data->tag, NULL,
&block->data.vorbis_comment);
default:
break;
}
}
void flac_error_common_cb(const char *plugin,
const FLAC__StreamDecoderErrorStatus status,
struct flac_data *data)
{
if (decoder_get_command(data->decoder) == DECODE_COMMAND_STOP)
return;
switch (status) {
case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC:
g_warning("%s lost sync\n", plugin);
break;
case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER:
g_warning("bad %s header\n", plugin);
break;
case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH:
g_warning("%s crc mismatch\n", plugin);
break;
default:
g_warning("unknown %s error\n", plugin);
}
}
FLAC__StreamDecoderWriteStatus
flac_common_write(struct flac_data *data, const FLAC__Frame * frame,
const FLAC__int32 *const buf[])
{
enum decoder_command cmd;
size_t buffer_size = frame->header.blocksize *
audio_format_frame_size(&data->audio_format);
void *buffer;
buffer = pcm_buffer_get(&data->buffer, buffer_size);
flac_convert(buffer, data->audio_format.channels,
data->audio_format.bits, buf,
0, frame->header.blocksize);
cmd = decoder_data(data->decoder, data->input_stream,
buffer, buffer_size,
data->time, data->bit_rate,
data->replay_gain_info);
switch (cmd) {
case DECODE_COMMAND_NONE:
case DECODE_COMMAND_START:
break;
case DECODE_COMMAND_STOP:
return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
case DECODE_COMMAND_SEEK:
return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
}
return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
}
#if defined(FLAC_API_VERSION_CURRENT) && FLAC_API_VERSION_CURRENT > 7
char*
flac_cue_track( const char* pathname,
const unsigned int tnum)
{
FLAC__bool success;
FLAC__StreamMetadata* cs;
success = FLAC__metadata_get_cuesheet(pathname, &cs);
if (!success)
return NULL;
assert(cs != NULL);
if (cs->data.cue_sheet.num_tracks <= 1)
{
FLAC__metadata_object_delete(cs);
return NULL;
}
if (tnum > 0 && tnum < cs->data.cue_sheet.num_tracks)
{
char* track = g_strdup_printf("track_%03u.flac", tnum);
FLAC__metadata_object_delete(cs);
return track;
}
else
{
FLAC__metadata_object_delete(cs);
return NULL;
}
}
unsigned int
flac_vtrack_tnum(const char* fname)
{
/* find last occurrence of '_' in fname
* which is hopefully something like track_xxx.flac
* another/better way would be to use tag struct
*/
char* ptr = strrchr(fname, '_');
// copy ascii tracknumber to int
char vtrack[4];
g_strlcpy(vtrack, ++ptr, 4);
return (unsigned int)strtol(vtrack, NULL, 10);
}
#endif /* FLAC_API_VERSION_CURRENT >= 7 */
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