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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 Thom Johansen
*
* 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.
*
****************************************************************************/
/* This is a lovely mishmash of sample.c from libmusepack and mpa2wav.c,
* but happens to work, so no whining!
*/
#include "plugin.h"
#if (CONFIG_HWCODEC == MASNONE)
/* software codec platforms */
#include <codecs/libmusepack/musepack.h>
#include "lib/xxx2wav.h" /* Helper functions common to test decoders */
static struct plugin_api* rb;
mpc_decoder decoder;
/*
Our implementations of the mpc_reader callback functions.
*/
mpc_int32_t
read_impl(void *data, void *ptr, mpc_int32_t size)
{
file_info_struct *f = (file_info_struct *)data;
mpc_int32_t num = f->filesize - f->curpos;
if (num > size)
num = size;
rb->memcpy(ptr, filebuf + f->curpos, num);
f->curpos += num;
return num;
}
bool
seek_impl(void *data, mpc_int32_t offset)
{
file_info_struct *f = (file_info_struct *)data;
if (offset > f->filesize) {
return 0;
} else {
f->curpos = offset;
return 1;
}
}
mpc_int32_t
tell_impl(void *data)
{
file_info_struct *f = (file_info_struct *)data;
return f->curpos;
}
mpc_int32_t
get_size_impl(void *data)
{
file_info_struct *f = (file_info_struct *)data;
return f->filesize;
}
bool
canseek_impl(void *data)
{
(void)data;
return true;
}
static int
shift_signed(MPC_SAMPLE_FORMAT val, int shift)
{
if (shift > 0)
val <<= shift;
else if (shift < 0)
val >>= -shift;
return (int)val;
}
#define OUTPUT_BUFFER_SIZE 65536 /* Must be an integer multiple of 4. */
unsigned char OutputBuffer[OUTPUT_BUFFER_SIZE];
MPC_SAMPLE_FORMAT sample_buffer[MPC_DECODER_BUFFER_LENGTH];
unsigned char *OutputPtr=OutputBuffer;
const unsigned char *OutputBufferEnd=OutputBuffer+OUTPUT_BUFFER_SIZE;
#ifdef USE_IRAM
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* file)
{
file_info_struct file_info;
unsigned short Sample;
unsigned status = 1;
unsigned int i;
mpc_reader reader;
/* Generic plugin inititialisation */
TEST_PLUGIN_API(api);
rb = api;
#ifdef USE_IRAM
rb->memcpy(iramstart, iramcopy, iramend-iramstart);
#endif
reader.read = read_impl;
reader.seek = seek_impl;
reader.tell = tell_impl;
reader.get_size = get_size_impl;
reader.canseek = canseek_impl;
reader.data = &file_info;
/* This function sets up the buffers and reads the file into RAM */
if (local_init(file, "/libmusepacktest.wav", &file_info, api)) {
return PLUGIN_ERROR;
}
/* read file's streaminfo data */
mpc_streaminfo info;
mpc_streaminfo_init(&info);
if (mpc_streaminfo_read(&info, &reader) != ERROR_CODE_OK) {
rb->splash(HZ, true, "Not an MPC file.");
return PLUGIN_ERROR;
}
file_info.samplerate=info.sample_freq;
/* instantiate a decoder with our file reader */
mpc_decoder_setup(&decoder, &reader);
if (!mpc_decoder_initialize(&decoder, &info)) {
rb->splash(HZ, true, "Error in init.");
return PLUGIN_ERROR;
}
file_info.frames_decoded = 0;
file_info.start_tick = *(rb->current_tick);
rb->button_clear_queue();
/* This is the decoding loop. */
while (status != 0) {
status = mpc_decoder_decode(&decoder, sample_buffer, 0, 0);
if (status == (unsigned)(-1)) {
//decode error
rb->splash(HZ, true, "Error decoding file.");
break;
}
else //status>0
{
file_info.current_sample += status;
file_info.frames_decoded++;
/* Convert musepack's numbers to an array of 16-bit LE signed integers */
#if 1 /* uncomment to time without byte swapping and disk writing */
for(i = 0; i < status*info.channels; i += info.channels)
{
/* Left channel */
Sample=shift_signed(sample_buffer[i], 16 - MPC_FIXED_POINT_SCALE_SHIFT);
*(OutputPtr++)=Sample&0xff;
*(OutputPtr++)=Sample>>8;
/* Right channel. If the decoded stream is monophonic then
* the right output channel is the same as the left one.
*/
if(info.channels==2)
Sample=shift_signed(sample_buffer[i + 1], 16 - MPC_FIXED_POINT_SCALE_SHIFT);
*(OutputPtr++)=Sample&0xff;
*(OutputPtr++)=Sample>>8;
/* Flush the buffer if it is full. */
if(OutputPtr==OutputBufferEnd)
{
rb->write(file_info.outfile,OutputBuffer,OUTPUT_BUFFER_SIZE);
OutputPtr=OutputBuffer;
}
}
#endif
}
display_status(&file_info);
if (rb->button_get(false)!=BUTTON_NONE) {
close_wav(&file_info);
return PLUGIN_OK;
}
}
close_wav(&file_info);
rb->splash(HZ*2, true, "FINISHED!");
return PLUGIN_OK;
}
#endif /* CONFIG_HWCODEC == MASNONE */
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