forked from len0rd/rockbox
116 lines
3.6 KiB
C
116 lines
3.6 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
*
|
|
* SID Codec for Rockbox using Hermit's cRSID library
|
|
*
|
|
* Written by Hermit (Mihaly Horvath) and Ninja (Wolfram Sang) in 2022/23.
|
|
* Some generic codec handling taken from the former SID codec done by
|
|
* Tammo Hinrichs, Rainer Sinsch, Dave Chapman, Stefan Waigand, Igor Poretsky,
|
|
* Solomon Peachy.
|
|
*
|
|
* 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 "cRSID/libcRSID.h"
|
|
#include "codeclib.h"
|
|
#include <inttypes.h>
|
|
|
|
CODEC_HEADER
|
|
|
|
/* bigger CHUNK_SIZE makes Clip sluggish when playing 2SIDs */
|
|
#define CHUNK_SIZE 512
|
|
#define SID_BUFFER_SIZE 0x10000
|
|
#define SAMPLE_RATE 44100
|
|
|
|
static int32_t samples_r[CHUNK_SIZE] IBSS_ATTR;
|
|
static int32_t samples_l[CHUNK_SIZE] IBSS_ATTR;
|
|
|
|
void sid_render(int32_t *buffer_r, int32_t *buffer_l, unsigned long len) ICODE_ATTR;
|
|
void sid_render(int32_t *buffer_r, int32_t *buffer_l, unsigned long len) {
|
|
unsigned long bp;
|
|
int output;
|
|
|
|
for (bp = 0; bp < len; bp++) {
|
|
output = cRSID_generateSample(&cRSID_C64) << 12;
|
|
*(buffer_r + bp) = output; *(buffer_l + bp) = output;
|
|
}
|
|
}
|
|
|
|
enum codec_status codec_main(enum codec_entry_call_reason reason)
|
|
{
|
|
if (reason == CODEC_LOAD) {
|
|
ci->configure(DSP_SET_FREQUENCY, SAMPLE_RATE);
|
|
ci->configure(DSP_SET_SAMPLE_DEPTH, 28);
|
|
ci->configure(DSP_SET_STEREO_MODE, STEREO_NONINTERLEAVED);
|
|
cRSID_init(SAMPLE_RATE, CHUNK_SIZE);
|
|
}
|
|
|
|
return CODEC_OK;
|
|
}
|
|
|
|
enum codec_status codec_run(void)
|
|
{
|
|
|
|
cRSID_SIDheader *SIDheader;
|
|
size_t filesize;
|
|
unsigned char subSong;
|
|
unsigned char *sidfile = NULL;
|
|
intptr_t param;
|
|
bool resume;
|
|
long action;
|
|
|
|
if (codec_init())
|
|
return CODEC_ERROR;
|
|
|
|
codec_set_replaygain(ci->id3);
|
|
|
|
ci->seek_buffer(0);
|
|
sidfile = ci->request_buffer(&filesize, SID_BUFFER_SIZE);
|
|
if (filesize == 0)
|
|
return CODEC_ERROR;
|
|
|
|
param = ci->id3->elapsed;
|
|
resume = param != 0;
|
|
|
|
/* Start first song */
|
|
action = CODEC_ACTION_SEEK_TIME;
|
|
|
|
while (action != CODEC_ACTION_HALT) {
|
|
if (action == CODEC_ACTION_SEEK_TIME) {
|
|
/* Start playing from scratch */
|
|
SIDheader = cRSID_processSIDfile(&cRSID_C64, sidfile, filesize);
|
|
subSong = SIDheader->DefaultSubtune - 1;
|
|
|
|
/* Now use the current seek time in seconds as subsong */
|
|
if (!resume || (resume && param))
|
|
subSong = param / 1000;
|
|
|
|
/* Set the elapsed time to the current subsong (in seconds) */
|
|
ci->set_elapsed(subSong * 1000);
|
|
ci->seek_complete();
|
|
resume = false;
|
|
|
|
cRSID_initSIDtune(&cRSID_C64, SIDheader, subSong + 1);
|
|
}
|
|
|
|
sid_render(samples_r, samples_l, CHUNK_SIZE);
|
|
ci->pcmbuf_insert(samples_r, samples_l, CHUNK_SIZE);
|
|
|
|
/* New time is in param */
|
|
action = ci->get_command(¶m);
|
|
}
|
|
|
|
return CODEC_OK;
|
|
}
|