acb0917556
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30264 a1c6a512-1295-4272-9138-f99709370657
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/* Ripped off from Game_Music_Emu 0.5.2. http://www.slack.net/~ant/ */
|
|
|
|
#include <string.h>
|
|
#include "codeclib.h"
|
|
#include "libgme/hes_emu.h"
|
|
|
|
CODEC_HEADER
|
|
|
|
/* Maximum number of bytes to process in one iteration */
|
|
#define CHUNK_SIZE (1024*2)
|
|
|
|
static int16_t samples[CHUNK_SIZE] IBSS_ATTR;
|
|
static struct Hes_Emu hes_emu IDATA_ATTR CACHEALIGN_ATTR;
|
|
|
|
/****************** rockbox interface ******************/
|
|
|
|
static void set_codec_track(int t) {
|
|
Hes_start_track(&hes_emu, t);
|
|
|
|
/* for REPEAT_ONE we disable track limits */
|
|
if (ci->global_settings->repeat_mode != REPEAT_ONE) {
|
|
Track_set_fade(&hes_emu, Track_get_length( &hes_emu, t ), 4000);
|
|
}
|
|
ci->set_elapsed(t*1000); /* t is track no to display */
|
|
}
|
|
|
|
/* this is the codec entry point */
|
|
enum codec_status codec_main(enum codec_entry_call_reason reason)
|
|
{
|
|
if (reason == CODEC_LOAD) {
|
|
/* we only render 16 bits */
|
|
ci->configure(DSP_SET_SAMPLE_DEPTH, 16);
|
|
|
|
/* 44 Khz, Interleaved stereo */
|
|
ci->configure(DSP_SET_FREQUENCY, 44100);
|
|
ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
|
|
|
|
Hes_init(&hes_emu);
|
|
Hes_set_sample_rate(&hes_emu, 44100);
|
|
}
|
|
|
|
return CODEC_OK;
|
|
}
|
|
|
|
/* this is called for each file to process */
|
|
enum codec_status codec_run(void)
|
|
{
|
|
blargg_err_t err;
|
|
uint8_t *buf;
|
|
size_t n;
|
|
intptr_t param;
|
|
int track = 0;
|
|
|
|
DEBUGF("HES: next_track\n");
|
|
if (codec_init()) {
|
|
return CODEC_ERROR;
|
|
}
|
|
|
|
codec_set_replaygain(ci->id3);
|
|
|
|
/* Read the entire file */
|
|
DEBUGF("HES: request file\n");
|
|
ci->seek_buffer(0);
|
|
buf = ci->request_buffer(&n, ci->filesize);
|
|
if (!buf || n < (size_t)ci->filesize) {
|
|
DEBUGF("HES: file load failed\n");
|
|
return CODEC_ERROR;
|
|
}
|
|
|
|
if ((err = Hes_load(&hes_emu, buf, ci->filesize))) {
|
|
DEBUGF("HES: Hes_load failed (%s)\n", err);
|
|
return CODEC_ERROR;
|
|
}
|
|
|
|
/* Update internal track count */
|
|
if (hes_emu.m3u.size > 0)
|
|
hes_emu.track_count = hes_emu.m3u.size;
|
|
|
|
next_track:
|
|
set_codec_track(track);
|
|
|
|
/* The main decoder loop */
|
|
while ( 1 ) {
|
|
enum codec_command_action action = ci->get_command(¶m);
|
|
|
|
if (action == CODEC_ACTION_HALT)
|
|
break;
|
|
|
|
if (action == CODEC_ACTION_SEEK_TIME) {
|
|
track = param/1000;
|
|
ci->seek_complete();
|
|
if (track >= hes_emu.track_count) break;
|
|
goto next_track;
|
|
}
|
|
|
|
/* Generate audio buffer */
|
|
err = Hes_play(&hes_emu, CHUNK_SIZE, samples);
|
|
if (err || hes_emu.track_ended) {
|
|
track++;
|
|
if (track >= hes_emu.track_count) break;
|
|
goto next_track;
|
|
}
|
|
|
|
ci->pcmbuf_insert(samples, NULL, CHUNK_SIZE >> 1);
|
|
}
|
|
|
|
return CODEC_OK;
|
|
}
|