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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Björn Stenberg
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "kernel.h"
#include "codecs.h"
#include "Tremor/ivorbisfile.h"
#include "playback.h"
#include "dsp.h"
#include "lib/codeclib.h"
static struct codec_api* rb;
/* Some standard functions and variables needed by Tremor */
int errno;
size_t strlen(const char *s)
{
return(rb->strlen(s));
}
char *strcpy(char *dest, const char *src)
{
return(rb->strcpy(dest,src));
}
char *strcat(char *dest, const char *src)
{
return(rb->strcat(dest,src));
}
size_t read_handler(void *ptr, size_t size, size_t nmemb, void *datasource)
{
(void)datasource;
return rb->read_filebuf(ptr, nmemb*size);
}
int seek_handler(void *datasource, ogg_int64_t offset, int whence)
{
/* We are not seekable at the moment */
(void)datasource;
(void)offset;
(void)whence;
return -1;
}
int close_handler(void *datasource)
{
(void)datasource;
return 0;
}
long tell_handler(void *datasource)
{
(void)datasource;
return rb->curpos;
}
#ifdef USE_IRAM
extern char iramcopy[];
extern char iramstart[];
extern char iramend[];
#endif
/* reserve the PCM buffer in the IRAM area */
static char pcmbuf[4096] IDATA_ATTR;
/* this is the codec entry point */
enum codec_status codec_start(struct codec_api* api)
{
ov_callbacks callbacks;
OggVorbis_File vf;
vorbis_info* vi;
int error;
long n;
int current_section;
int eof;
TEST_CODEC_API(api);
/* if you are using a global api pointer, don't forget to copy it!
otherwise you will get lovely "I04: IllInstr" errors... :-) */
rb = api;
#ifdef USE_IRAM
rb->memcpy(iramstart, iramcopy, iramend-iramstart);
#endif
rb->configure(CODEC_SET_FILEBUF_LIMIT, (int *)(1024*1024*2));
rb->configure(CODEC_SET_FILEBUF_CHUNKSIZE, (int *)(1024*64));
rb->configure(DSP_DITHER, (bool *)false);
rb->configure(DSP_SET_STEREO_MODE, (int *)STEREO_INTERLEAVED);
rb->configure(DSP_SET_SAMPLE_DEPTH, (int *)(16));
/* We need to flush reserver memory every track load. */
next_track:
if (codec_init(rb)) {
return CODEC_ERROR;
}
while (!rb->taginfo_ready)
rb->yield();
if (rb->id3->frequency != NATIVE_FREQUENCY) {
rb->configure(DSP_SET_FREQUENCY, (long *)(rb->id3->frequency));
rb->configure(CODEC_DSP_ENABLE, (bool *)true);
} else {
rb->configure(CODEC_DSP_ENABLE, (bool *)false);
}
/* Create a decoder instance */
callbacks.read_func=read_handler;
callbacks.seek_func=seek_handler;
callbacks.tell_func=tell_handler;
callbacks.close_func=close_handler;
error=ov_open_callbacks(rb,&vf,NULL,0,callbacks);
vi=ov_info(&vf,-1);
if (vi==NULL) {
// rb->splash(HZ*2, true, "Vorbis Error");
return CODEC_ERROR;
}
eof=0;
while (!eof) {
/* Read host-endian signed 16 bit PCM samples */
n=ov_read(&vf,pcmbuf,sizeof(pcmbuf),¤t_section);
if (n==0) {
eof=1;
}
else if (n < 0) {
DEBUGF("Error decoding frame\n");
} else {
rb->yield();
if (rb->stop_codec || rb->reload_codec)
break ;
while (!rb->audiobuffer_insert(pcmbuf, n))
rb->yield();
rb->set_elapsed(ov_time_tell(&vf));
}
}
if (rb->request_next_track())
goto next_track;
return CODEC_OK;
}
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