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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2010 Yoshihisa Uchida
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "codeclib.h"
#include "codecs/libtta/ttalib.h"
CODEC_HEADER
/*
* TTA (True Audio) codec:
*
* References
* [1] TRUE AUDIO CODEC SOFTWARE http://true-audio.com/
*/
static int32_t samples[PCM_BUFFER_LENGTH * 2] IBSS_ATTR;
/* this is the codec entry point */
enum codec_status codec_main(void)
{
tta_info info;
int status = CODEC_OK;
unsigned int decodedsamples;
int endofstream;
int new_pos = 0;
int sample_count;
/* Generic codec initialisation */
ci->configure(DSP_SET_SAMPLE_DEPTH, TTA_OUTPUT_DEPTH - 1);
next_track:
if (codec_init())
{
DEBUGF("codec_init() error\n");
status = CODEC_ERROR;
goto exit;
}
while (!*ci->taginfo_ready && !ci->stop_codec)
ci->sleep(1);
if (set_tta_info(&info) < 0 || player_init(&info) < 0)
{
status = CODEC_ERROR;
goto exit;
}
codec_set_replaygain(ci->id3);
ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
if (info.NCH == 2) {
ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
} else if (info.NCH == 1) {
ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO);
} else {
DEBUGF("CODEC_ERROR: more than 2 channels\n");
status = CODEC_ERROR;
goto done;
}
/* The main decoder loop */
decodedsamples = 0;
endofstream = 0;
if (ci->id3->offset > 0)
{
/* Need to save offset for later use (cleared indirectly by advance_buffer) */
new_pos = set_position(ci->id3->offset, TTA_SEEK_POS);
if (new_pos >= 0)
decodedsamples = new_pos;
ci->seek_complete();
}
while (!endofstream)
{
ci->yield();
if (ci->stop_codec || ci->new_track)
break;
if (ci->seek_time)
{
new_pos = set_position(ci->seek_time / SEEK_STEP, TTA_SEEK_TIME);
if (new_pos >= 0)
{
decodedsamples = new_pos;
ci->seek_complete();
}
}
sample_count = get_samples(samples);
if (sample_count < 0)
{
status = CODEC_ERROR;
break;
}
ci->pcmbuf_insert(samples, NULL, sample_count);
decodedsamples += sample_count;
if (decodedsamples >= info.DATALENGTH)
endofstream = 1;
ci->set_elapsed((uint64_t)info.LENGTH * 1000 * decodedsamples / info.DATALENGTH);
}
status = CODEC_OK;
done:
player_stop();
if (ci->request_next_track())
goto next_track;
exit:
return status;
}
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