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I'm using SBL for the audio.
You mean only the left or right speaker is outputting cd audio?
SND_SetCdDaPan(-15, 15);slCDDAOn(127, 127, 0, 0);slCDDAOn(127, 127, -127, 127);
#ifndef __AUDIO_H__
#define __AUDIO_H__
#define SECTOR_SIZE (2324L)
#define RING_BUF_SIZE (2324L*10)
#define PCM_ADDR ((void*)0x25a20000)
#define PCM_SIZE (4096L*4)
#define SMP_1TASK_SAMPLE (1024)
#define SMP_TR_MODE_CD (PCM_TRMODE_SCU)
#define SMP_LOAD_NUM (10)
#define SND_RAM (94371840)
#define LW_RAM (2097152)
//Functions go here
void adpcm_load(void);
#endif
//audio.c
//this file is compiled separately
#include <jo/jo.h>
#include "audio.h"
//goals:
//Apparently, this file is CD-ROM XA.
void adpcm_load(void){
/* Work */
PcmWork pcm_work;
PcmCreatePara para;
/* Ring Buffer */
Uint32 ring_buf[RING_BUF_SIZE / sizeof(Uint32)];
// Handles
StmHn stm;
PcmHn pcm;
StmGrpHn stmfpcm;
StmKey key;
PcmInfo info;
Sint8* name = "SHELL.ADP";
Sint32 fid = GFS_NameToId(name);
//Data of read in process
Sint32 rdsize;
/* Set Interrupt Process */
// Use
// INT_???
// and set V-Blank IN interrupt.
// Call
// PCM_VblIn();
// within V-Blank IN interrupt.
/* File initialization */
stmfpcm = STM_OpenGrp();
STM_SetExecGrp(stmfpcm);
STM_KEY_FN(&key) = STM_KEY_CN(&key) = STM_KEY_SMMSK(&key) =
STM_KEY_SMVAL(&key) = STM_KEY_CIMSK(&key) = STM_KEY_CIVAL(&key) =
STM_KEY_NONE;
//FOR CDROM XA
STM_KEY_SMMSK(&key) = STM_KEY_SMVAL(&key) = 0x04;/* Audio Sector */
STM_KEY_CN(&key) = 0; /* channel No. */
/* Open Stream */
stm = STM_OpenFid(stmfpcm, fid, &key, STM_LOOP_NOREAD);
/* Create Handle */
PCM_PARA_WORK(¶) = &pcm_work;
PCM_PARA_RING_ADDR(¶) = ring_buf;
PCM_PARA_RING_SIZE(¶) = RING_BUF_SIZE;
PCM_PARA_PCM_ADDR(¶) = PCM_ADDR;
PCM_PARA_PCM_SIZE(¶) = PCM_SIZE;
pcm = PCM_CreateStmHandle(¶, stm);
//SET PCM INFO FOR ADPCM
typedef struct {
PCM_INFO_FILE_TYPE;
PCM_INFO_DATA_TYPE;
// Sint32 file_size; how big is your file in bytes?
// Sint32 channel; how many channels does your file have? '1' if mono '2' if stereo.
// Sint32 sampling_bit; based on your comment I think this is 16.
// Sint32 sampling_rate; in your case this is 18900.
// Sint32 sample_file; I think this is asking for how many samples are in your file. In order to check this
// use a program like audacity.
// Sint32 compression_type; I don't actually know what this is asking for and have no idea what to put here.
} PcmInfo;
PCM_INFO_FILE_TYPE(&info) = PCM_FILE_TYPE_NO_HEADER;
PCM_INFO_DATA_TYPE(&info) = PCM_DATA_TYPE_ADPCM_SCT;
PCM_SetVolume(pcm, 7);
PCM_SetInfo(pcm, &info);
PCM_SetLoadNum(pcm, SMP_LOAD_NUM);
PCM_SetTrModeCd(pcm, SMP_TR_MODE_CD);
PCM_Set1TaskSample(pcm, SMP_1TASK_SAMPLE);
PCM_ChangePcmPara(pcm);
/* Start Playback */
PCM_Start(pcm);
while(TRUE) {
STM_ExecServer();
rdsize = STM_GetNumCdbuf(stm);
jo_printf(0, 0, "(%i)", rdsize);
/* Playback task processing */
PCM_Task(pcm);
/* End condition */
if (PCM_GetPlayStatus(pcm) == PCM_STAT_PLAY_END) break;
if(jo_is_pad1_key_pressed(JO_KEY_A)){
break;
}
}
/* Destroy Handle */
PCM_DestroyStmHandle(pcm);
/* Close stream */
STM_Close(stm);
/* End Processing */
PCM_Finish();
}
Thanks.
But if anyone wants to do it, it would be more than welcome for the whole community!
I need to finish the model converter I promised and continue working on the engine for a long overdue update.
Edit : Just added an image of PCM-ADPCM CPU overhead. Note that playing small sounds from memory is less expensive since you don't need to transfer data from the CD, but it still requires DMA and hogs the B-Bus.
I know this table data.
But I have a doubt. The overhead are for 1x SH2, for 2x. For the M68000? For all?
And more. The formula use it to calculate this value % is this: R = (100 X Ttask) / Tplay
Whit this, really not know, which CPU refer, or quantity of cycles used for DMA transfers or decompress the ADPCM data... And another doubt is, use it DMA transfers via SCU or directly SH2 to 68EC000 or SCSP. Or both.
Last. ADX form CRI, is possible better implementation of ADPCM for SS. Burning Rangers or Deep Fear, play BGM all time, and use it also for speech or dialogues. I don’t know if is possible play more than one stream or more, play directly from RAM and mix "like" PSX. I cant find the SS library functions form ADX in the web.
Greetings!