-/* faked 940 code just uses local copy of ym2612 */
-/* TODO: rm this */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/mman.h>
-#include <sys/ioctl.h>
-#include <fcntl.h>
-#include <errno.h>
-
-#include "../../pico/sound/ym2612.h"
-//#include "../gp2x/gp2x.h"
-#include "../gp2x/emu.h"
-#include "../gp2x/code940/940shared.h"
-#include "../common/helix/pub/mp3dec.h"
-#include "../../pico/pico_int.h"
-
-
-// static _940_data_t shared_data_;
-static _940_ctl_t shared_ctl_;
-// static _940_data_t *shared_data = &shared_data_;
-_940_ctl_t *shared_ctl = &shared_ctl_;
-
-unsigned char *mp3_mem = 0;
-
-#define MP3_SIZE_MAX (0x1000000 - 4*640*480)
-
-/***********************************************************/
-
-
-int YM2612Write_940(unsigned int a, unsigned int v, int scanline)
-{
- YM2612Write_(a, v);
-
- return 0; // cause the engine to do updates once per frame only
-}
-
-
-void YM2612PicoStateLoad_940(void)
-{
- int i;
-
- YM2612PicoStateLoad_();
-
- for(i = 0; i < 0x100; i++) {
- YM2612Write_(0, i);
- YM2612Write_(1, ym2612.REGS[i]);
- }
- for(i = 0; i < 0x100; i++) {
- YM2612Write_(2, i);
- YM2612Write_(3, ym2612.REGS[i|0x100]);
- }
-}
-
-void YM2612PicoStateSave2_940(int tat, int tbt)
-{
- YM2612PicoStateSave2(tat, tbt);
-}
-
-int YM2612PicoStateLoad2_940(int *tat, int *tbt)
-{
- return YM2612PicoStateLoad2(tat, tbt);
-}
-
-
-void sharedmem_init(void)
-{
- mp3_mem = malloc(MP3_SIZE_MAX);
-}
-
-void sharedmem_deinit(void)
-{
- free(mp3_mem);
-}
-
-void YM2612Init_940(int baseclock, int rate)
-{
- YM2612Init_(baseclock, rate);
-}
-
-
-void YM2612ResetChip_940(void)
-{
- YM2612ResetChip_();
-}
-
-
-#if 0
-static void local_decode(void)
-{
- int mp3_offs = shared_ctl->mp3_offs;
- unsigned char *readPtr = mp3_mem + mp3_offs;
- int bytesLeft = shared_ctl->mp3_len - mp3_offs;
- int offset; // frame offset from readPtr
- int err = 0;
-
- if (bytesLeft <= 0) return; // EOF, nothing to do
-
- offset = MP3FindSyncWord(readPtr, bytesLeft);
- if (offset < 0) {
- shared_ctl->mp3_offs = shared_ctl->mp3_len;
- return; // EOF
- }
- readPtr += offset;
- bytesLeft -= offset;
-
- err = MP3Decode(shared_data->mp3dec, &readPtr, &bytesLeft,
- shared_data->mp3_buffer[shared_ctl->mp3_buffsel], 0);
- if (err) {
- if (err == ERR_MP3_INDATA_UNDERFLOW) {
- shared_ctl->mp3_offs = shared_ctl->mp3_len; // EOF
- return;
- } else if (err <= -6 && err >= -12) {
- // ERR_MP3_INVALID_FRAMEHEADER, ERR_MP3_INVALID_*
- // just try to skip the offending frame..
- readPtr++;
- }
- shared_ctl->mp3_errors++;
- shared_ctl->mp3_lasterr = err;
- }
- shared_ctl->mp3_offs = readPtr - mp3_mem;
-}
-#endif
-
-
-
-
-static FILE *loaded_mp3 = 0;
-
-int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)
-{
-#if 0
- int cdda_on, *ym_buffer = mix_buffer;
- static int mp3_samples_ready = 0, mp3_buffer_offs = 0;
- static int mp3_play_bufsel = 1;
-
-
- YM2612UpdateOne_(buffer, length, stereo); // really writes to mix_buffer
-
- // emulatind MCD, not data track, CDC is reading, playback was started, track not ended
- cdda_on = (PicoMCD & 1) && !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1)
- && loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;
-
- /* mix data from previous go */
- if (cdda_on && mp3_samples_ready >= length)
- {
- if (1152 - mp3_buffer_offs >= length) {
- mix_samples(buffer, ym_buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length, stereo);
-
- mp3_buffer_offs += length;
- } else {
- // collect from both buffers..
- int left = 1152 - mp3_buffer_offs;
- mix_samples(buffer, ym_buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, left, stereo);
- mp3_play_bufsel ^= 1;
- mp3_buffer_offs = length - left;
- mix_samples(buffer + left * 2, ym_buffer + left * 2,
- shared_data->mp3_buffer[mp3_play_bufsel], mp3_buffer_offs, stereo);
- }
- mp3_samples_ready -= length;
- } else {
- mix_samples(buffer, ym_buffer, 0, length, stereo);
- }
-
- // make sure we will have enough mp3 samples next frame
- if (cdda_on && mp3_samples_ready < length)
- {
- shared_ctl->mp3_buffsel ^= 1;
- local_decode();
- mp3_samples_ready += 1152;
- }
-#else
- return YM2612UpdateOne_(buffer, length, stereo, is_buf_empty);
-#endif
-}
-
-
-void mp3_update(int *buffer, int length, int stereo)
-{
- // nothing..
-}
-
-
-/***********************************************************/
-
-void mp3_start_play(FILE *f, int pos) // pos is 0-1023
-{
- int byte_offs = 0;
-
- if (loaded_mp3 != f)
- {
- printf("loading mp3... "); fflush(stdout);
- fseek(f, 0, SEEK_SET);
- fread(mp3_mem, 1, MP3_SIZE_MAX, f);
- if (feof(f)) printf("done.\n");
- else printf("done. mp3 too large, not all data loaded.\n");
- shared_ctl->mp3_len = ftell(f);
- loaded_mp3 = f;
- }
-
- // seek..
- if (pos) {
- byte_offs = (shared_ctl->mp3_len << 6) >> 10;
- byte_offs *= pos;
- byte_offs >>= 6;
- }
- printf("mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);
-
- shared_ctl->mp3_offs = byte_offs;
-}
-
-