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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 "plugin.h"
#include <codecs/libFLAC/include/FLAC/seekable_stream_decoder.h>
#include "playback.h"
#include "lib/codeclib.h"
#define FLAC_MAX_SUPPORTED_BLOCKSIZE 4608
#define FLAC_MAX_SUPPORTED_CHANNELS 2
static struct plugin_api* rb;
/* Called when the FLAC decoder needs some FLAC data to decode */
FLAC__SeekableStreamDecoderReadStatus flac_read_handler(const FLAC__SeekableStreamDecoder *dec,
FLAC__byte buffer[], unsigned *bytes, void *data)
{ struct codec_api* ci = (struct codec_api*)data;
(void)dec;
*bytes=(unsigned)(ci->read_filebuf(buffer,*bytes));
/* QUESTION: How do I detect the end of the stream? */
if (ci->curpos >= ci->filesize) {
return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
}
return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
}
static unsigned char pcmbuf[FLAC_MAX_SUPPORTED_BLOCKSIZE*FLAC_MAX_SUPPORTED_CHANNELS*2] IDATA_ATTR;
/* Called when the FLAC decoder has some decoded PCM data to write */
FLAC__StreamDecoderWriteStatus flac_write_handler(const FLAC__SeekableStreamDecoder *dec,
const FLAC__Frame *frame,
const FLAC__int32 * const buf[],
void *data)
{
struct codec_api* ci = (struct codec_api*)data;
(void)dec;
unsigned int c_samp, c_chan, d_samp;
uint32_t data_size = frame->header.blocksize * frame->header.channels * 2; /* Assume 16-bit words */
uint32_t samples = frame->header.blocksize;
if (samples*frame->header.channels > (FLAC_MAX_SUPPORTED_BLOCKSIZE*FLAC_MAX_SUPPORTED_CHANNELS)) {
// ERROR!!!
DEBUGF("ERROR: samples*frame->header.channels=%d\n",samples*frame->header.channels);
return(FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE);
}
(void)dec;
for(c_samp = d_samp = 0; c_samp < samples; c_samp++) {
for(c_chan = 0; c_chan < frame->header.channels; c_chan++, d_samp++) {
pcmbuf[d_samp*2] = (buf[c_chan][c_samp]&0xff00)>>8;
pcmbuf[(d_samp*2)+1] = buf[c_chan][c_samp]&0xff;
}
}
while (!ci->audiobuffer_insert(pcmbuf, data_size))
rb->yield();
return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
}
void flac_metadata_handler(const FLAC__SeekableStreamDecoder *dec,
const FLAC__StreamMetadata *meta, void *data)
{
/* Ignore metadata for now... */
(void)dec;
(void)meta;
(void)data;
}
void flac_error_handler(const FLAC__SeekableStreamDecoder *dec,
FLAC__StreamDecoderErrorStatus status, void *data)
{
(void)dec;
(void)status;
(void)data;
}
FLAC__SeekableStreamDecoderSeekStatus flac_seek_handler (const FLAC__SeekableStreamDecoder *decoder,
FLAC__uint64 absolute_byte_offset,
void *client_data)
{
(void)decoder;
struct codec_api* ci = (struct codec_api*)client_data;
if (ci->seek_buffer(absolute_byte_offset)) {
return(FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_OK);
} else {
return(FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_ERROR);
}
}
FLAC__SeekableStreamDecoderTellStatus flac_tell_handler (const FLAC__SeekableStreamDecoder *decoder,
FLAC__uint64 *absolute_byte_offset, void *client_data)
{
struct codec_api* ci = (struct codec_api*)client_data;
(void)decoder;
*absolute_byte_offset=ci->curpos;
return(FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_OK);
}
FLAC__SeekableStreamDecoderLengthStatus flac_length_handler (const FLAC__SeekableStreamDecoder *decoder,
FLAC__uint64 *stream_length, void *client_data)
{
struct codec_api* ci = (struct codec_api*)client_data;
(void)decoder;
*stream_length=ci->filesize;
return(FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_OK);
}
FLAC__bool flac_eof_handler (const FLAC__SeekableStreamDecoder *decoder,
void *client_data)
{
struct codec_api* ci = (struct codec_api*)client_data;
(void)decoder;
if (ci->curpos >= ci->filesize) {
return(true);
} else {
return(false);
}
}
#ifndef SIMULATOR
extern char iramcopy[];
extern char iramstart[];
extern char iramend[];
#endif
/* this is the plugin entry point */
enum plugin_status plugin_start(struct plugin_api* api, void* parm)
{
struct codec_api* ci = (struct codec_api*)parm;
FLAC__SeekableStreamDecoder* flacDecoder;
/* Generic plugin initialisation */
TEST_PLUGIN_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;
#ifndef SIMULATOR
rb->memcpy(iramstart, iramcopy, iramend-iramstart);
#endif
/* This function sets up the buffers and reads the file into RAM */
if (codec_init(api, ci)) {
return PLUGIN_ERROR;
}
/* Create a decoder instance */
next_track:
flacDecoder=FLAC__seekable_stream_decoder_new();
/* Set up the decoder and the callback functions - this must be done before init */
/* The following are required for stream_decoder and higher */
FLAC__seekable_stream_decoder_set_client_data(flacDecoder,ci);
FLAC__seekable_stream_decoder_set_write_callback(flacDecoder, flac_write_handler);
FLAC__seekable_stream_decoder_set_read_callback(flacDecoder, flac_read_handler);
FLAC__seekable_stream_decoder_set_metadata_callback(flacDecoder, flac_metadata_handler);
FLAC__seekable_stream_decoder_set_error_callback(flacDecoder, flac_error_handler);
FLAC__seekable_stream_decoder_set_metadata_respond(flacDecoder, FLAC__METADATA_TYPE_STREAMINFO);
/* The following are only for the seekable_stream_decoder */
FLAC__seekable_stream_decoder_set_seek_callback(flacDecoder, flac_seek_handler);
FLAC__seekable_stream_decoder_set_tell_callback(flacDecoder, flac_tell_handler);
FLAC__seekable_stream_decoder_set_length_callback(flacDecoder, flac_length_handler);
FLAC__seekable_stream_decoder_set_eof_callback(flacDecoder, flac_eof_handler);
/* QUESTION: What do we do when the init fails? */
if (FLAC__seekable_stream_decoder_init(flacDecoder)) {
return PLUGIN_ERROR;
}
/* The first thing to do is to parse the metadata */
FLAC__seekable_stream_decoder_process_until_end_of_metadata(flacDecoder);
/* The main decoder loop */
while (FLAC__seekable_stream_decoder_get_state(flacDecoder)!=2) {
rb->yield();
if (ci->stop_codec || ci->reload_codec) {
break;
}
FLAC__seekable_stream_decoder_process_single(flacDecoder);
}
if (ci->request_next_track())
goto next_track;
return PLUGIN_OK;
}
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