2e314093c8
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24682 a1c6a512-1295-4272-9138-f99709370657
139 lines
4.7 KiB
C
139 lines
4.7 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2009 Mohamed Tarek
|
|
*
|
|
* 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 <string.h>
|
|
|
|
#include "logf.h"
|
|
#include "codeclib.h"
|
|
#include "inttypes.h"
|
|
#include "libatrac/atrac3.h"
|
|
|
|
CODEC_HEADER
|
|
|
|
#define FRAMESIZE ci->id3->bytesperframe
|
|
#define BITRATE ci->id3->bitrate
|
|
|
|
ATRAC3Context q IBSS_ATTR;
|
|
|
|
/* this is the codec entry point */
|
|
enum codec_status codec_main(void)
|
|
{
|
|
static size_t buff_size;
|
|
int datasize, res, frame_counter, total_frames, seek_frame_offset;
|
|
uint8_t *bit_buffer;
|
|
int elapsed = 0;
|
|
size_t resume_offset = ci->id3->offset;
|
|
|
|
next_track:
|
|
if (codec_init()) {
|
|
DEBUGF("codec init failed\n");
|
|
return CODEC_ERROR;
|
|
}
|
|
while (!*ci->taginfo_ready && !ci->stop_codec)
|
|
ci->sleep(1);
|
|
|
|
codec_set_replaygain(ci->id3);
|
|
ci->memset(&q,0,sizeof(ATRAC3Context));
|
|
|
|
ci->configure(DSP_SET_FREQUENCY, ci->id3->frequency);
|
|
ci->configure(DSP_SET_SAMPLE_DEPTH, 17); /* Remark: atrac3 uses s15.0 by default, s15.2 was hacked. */
|
|
ci->configure(DSP_SET_STEREO_MODE, ci->id3->channels == 1 ?
|
|
STEREO_MONO : STEREO_NONINTERLEAVED);
|
|
|
|
res =atrac3_decode_init(&q, ci->id3);
|
|
if(res < 0) {
|
|
DEBUGF("failed to initialize atrac decoder\n");
|
|
return CODEC_ERROR;
|
|
}
|
|
|
|
/* check for a mid-track resume and force a seek time accordingly */
|
|
if(resume_offset > ci->id3->first_frame_offset) {
|
|
resume_offset -= ci->id3->first_frame_offset;
|
|
/* calculate resume_offset in frames */
|
|
resume_offset = (int)resume_offset / FRAMESIZE;
|
|
ci->seek_time = (int)resume_offset * ((FRAMESIZE * 8)/BITRATE);
|
|
}
|
|
total_frames = (ci->id3->filesize - ci->id3->first_frame_offset) / FRAMESIZE;
|
|
frame_counter = 0;
|
|
|
|
ci->set_elapsed(0);
|
|
ci->advance_buffer(ci->id3->first_frame_offset);
|
|
|
|
/* The main decoder loop */
|
|
seek_start :
|
|
while(frame_counter < total_frames)
|
|
{
|
|
bit_buffer = (uint8_t *) ci->request_buffer(&buff_size, FRAMESIZE);
|
|
|
|
ci->yield();
|
|
if (ci->stop_codec || ci->new_track)
|
|
goto done;
|
|
|
|
if (ci->seek_time) {
|
|
ci->set_elapsed(ci->seek_time);
|
|
|
|
/* Do not allow seeking beyond the file's length */
|
|
if ((unsigned) ci->seek_time > ci->id3->length) {
|
|
ci->seek_complete();
|
|
goto done;
|
|
}
|
|
|
|
/* Seek to the start of the track */
|
|
if (ci->seek_time == 1) {
|
|
ci->set_elapsed(0);
|
|
ci->seek_complete();
|
|
ci->seek_buffer(ci->id3->first_frame_offset);
|
|
elapsed = 0;
|
|
goto seek_start;
|
|
}
|
|
seek_frame_offset = (ci->seek_time * BITRATE) / (8 * FRAMESIZE);
|
|
frame_counter = seek_frame_offset;
|
|
ci->seek_buffer(ci->id3->first_frame_offset + seek_frame_offset* FRAMESIZE);
|
|
bit_buffer = (uint8_t *) ci->request_buffer(&buff_size, FRAMESIZE);
|
|
elapsed = ci->seek_time;
|
|
|
|
ci->set_elapsed(elapsed);
|
|
ci->seek_complete();
|
|
}
|
|
|
|
res = atrac3_decode_frame(FRAMESIZE, &q, &datasize, bit_buffer, FRAMESIZE);
|
|
|
|
if(res != (int)FRAMESIZE) {
|
|
DEBUGF("codec error\n");
|
|
return CODEC_ERROR;
|
|
}
|
|
|
|
if(datasize)
|
|
ci->pcmbuf_insert(q.outSamples, q.outSamples + 1024, q.samples_per_frame / ci->id3->channels);
|
|
|
|
elapsed += (FRAMESIZE * 8) / BITRATE;
|
|
ci->set_elapsed(elapsed);
|
|
|
|
ci->advance_buffer(FRAMESIZE);
|
|
frame_counter++;
|
|
}
|
|
|
|
done:
|
|
if (ci->request_next_track())
|
|
goto next_track;
|
|
|
|
return CODEC_OK;
|
|
}
|