ref: 136de4805728e9baf48582aa9166d934f106b9f6
dir: /src/Sound.cpp/
// THIS IS DECOMPILED PROPRIETARY CODE - USE AT YOUR OWN RISK.
//
// The original code belongs to Daisuke "Pixel" Amaya.
//
// Modifications and custom code are under the MIT licence.
// See LICENCE.txt for details.
// Some of the original source code for this file can be found here:
// https://github.com/shbow/organya/blob/master/source/Sound.cpp
/*
TODO - Code style
Pixel's code was *extremely* Windows-centric, to the point of using
things like ZeroMemory and LPCSTR instead of standard things like
memset and const char*. For now, the decompilation is accurate despite
not using these since they're just macros that evaluate to the portable
equivalents.
*/
#include "Sound.h"
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "WindowsWrapper.h"
#include "Backends/Audio.h"
#include "Main.h"
#include "Organya.h"
#include "PixTone.h"
#include "Resource.h"
BOOL audio_backend_initialised;
AudioBackend_Sound *lpSECONDARYBUFFER[SE_MAX];
// DirectSoundの開始 (Starting DirectSound)
BOOL InitDirectSound(void)
{
int i;
audio_backend_initialised = AudioBackend_Init();
if (!audio_backend_initialised)
{
#ifndef FIX_BUGS
// This makes absolutely no sense here
StartOrganya("Org/Wave.dat");
#endif
return FALSE;
}
for (i = 0; i < SE_MAX; i++)
lpSECONDARYBUFFER[i] = NULL;
StartOrganya("Org/Wave.dat");
return TRUE;
}
// DirectSoundの終了 (Exit DirectSound)
void EndDirectSound(void)
{
int i;
if (!audio_backend_initialised)
return;
EndOrganya();
for (i = 0; i < SE_MAX; i++)
if (lpSECONDARYBUFFER[i] != NULL)
AudioBackend_DestroySound(lpSECONDARYBUFFER[i]);
AudioBackend_Deinit();
}
// Below are two completely unused functions for loading .wav files as sound effects.
// Some say that sounds heard in CS Beta footage don't sound like PixTone...
// There's a bit of a problem with this code: it hardcodes the offsets of various bits
// of data in the WAV header - this makes the code only compatible with very specific
// .wav files. You can check the prototype OrgView EXEs for examples of those.
// サウンドの設定 (Sound settings)
BOOL InitSoundObject(const char *resname, int no)
{
const unsigned char *resource_pointer; // リソースのアドレス (Resource address)
if (!audio_backend_initialised)
return TRUE;
// リソースの検索 (Search for resources)
resource_pointer = FindResource(resname, "WAVE", NULL);
if (resource_pointer == NULL)
return FALSE;
// Get sound properties, and check if it's valid
unsigned long buffer_size = resource_pointer[0x36] | (resource_pointer[0x37] << 8) | (resource_pointer[0x38] << 16) | (resource_pointer[0x39] << 24);
unsigned short format = resource_pointer[0x14] | (resource_pointer[0x15] << 8);
unsigned short channels = resource_pointer[0x16] | (resource_pointer[0x17] << 8);
unsigned long sample_rate = resource_pointer[0x18] | (resource_pointer[0x19] << 8) | (resource_pointer[0x1A] << 16) | (resource_pointer[0x1B] << 24);
unsigned short bits_per_sample = resource_pointer[0x22] | (resource_pointer[0x23] << 8);
if (format != 1) // 1 is WAVE_FORMAT_PCM
return FALSE;
if (channels != 1) // The mixer only supports mono right now
return FALSE;
if (bits_per_sample != 8) // The mixer only supports unsigned 8-bit samples
return FALSE;
// 二次バッファの生成 (Create secondary buffer)
lpSECONDARYBUFFER[no] = AudioBackend_CreateSound(sample_rate, resource_pointer + 0x3A, buffer_size);
if (lpSECONDARYBUFFER[no] == NULL)
return FALSE;
return TRUE;
}
BOOL LoadSoundObject(const char *file_name, int no)
{
char path[128];
//unsigned long i;
unsigned long file_size = 0;
char check_box[58];
FILE *fp;
snprint(path, sizeof path, "%s/%s", gModulePath, file_name);
if (!audio_backend_initialised)
return TRUE;
if ((fp = fopen(path, "rb")) == NULL)
return FALSE;
fseek(fp, 0, SEEK_END);
file_size = ftell(fp);
rewind(fp);
// Let's not throttle disk I/O, shall we...
//for (i = 0; i < 58; i++)
// fread(&check_box[i], sizeof(char), 1, fp); // Holy hell, this is inefficient
fread(check_box, 1, 58, fp);
#ifdef FIX_MAJOR_BUGS
// The original code forgets to close 'fp'
if (check_box[0] != 'R' || check_box[1] != 'I' || check_box[2] != 'F' || check_box[3] != 'F')
{
fclose(fp);
return FALSE;
}
#else
if (check_box[0] != 'R')
return FALSE;
if (check_box[1] != 'I')
return FALSE;
if (check_box[2] != 'F')
return FALSE;
if (check_box[3] != 'F')
return FALSE;
#endif
unsigned char *wp;
wp = (unsigned char*)malloc(file_size); // ファイルのワークスペースを作る (Create a file workspace)
#ifdef FIX_MAJOR_BUGS
if (wp == NULL)
{
fclose(fp);
return FALSE;
}
#endif
fseek(fp, 0, SEEK_SET);
// Bloody hell, Pixel, come on...
//for (i = 0; i < file_size; i++)
// fread((BYTE*)wp+i, sizeof(char), 1, fp); // Pixel, stahp
fread(wp, 1, file_size, fp);
fclose(fp);
// Get sound properties, and check if it's valid
unsigned long buffer_size = wp[0x36] | (wp[0x37] << 8) | (wp[0x38] << 16) | (wp[0x39] << 24);
unsigned short format = wp[0x14] | (wp[0x15] << 8);
unsigned short channels = wp[0x16] | (wp[0x17] << 8);
unsigned long sample_rate = wp[0x18] | (wp[0x19] << 8) | (wp[0x1A] << 16) | (wp[0x1B] << 24);
unsigned short bits_per_sample = wp[0x22] | (wp[0x23] << 8);
if (format != 1) // 1 is WAVE_FORMAT_PCM
{
free(wp);
return FALSE;
}
if (channels != 1) // The mixer only supports mono right now
{
free(wp);
return FALSE;
}
if (bits_per_sample != 8) // The mixer only supports 8-bit unsigned samples
{
free(wp);
return FALSE;
}
// セカンダリバッファの生成 (Create secondary buffer)
lpSECONDARYBUFFER[no] = AudioBackend_CreateSound(sample_rate, wp + 0x3A, buffer_size);
if (lpSECONDARYBUFFER[no] == NULL)
{
#ifdef FIX_MAJOR_BUGS
free(wp); // The updated Organya source code includes this fix
#endif
return FALSE;
}
free(wp);
return TRUE;
}
void PlaySoundObject(int no, SoundMode mode)
{
if (!audio_backend_initialised)
return;
if (lpSECONDARYBUFFER[no] != NULL)
{
switch (mode)
{
case SOUND_MODE_STOP: // 停止 (Stop)
AudioBackend_StopSound(lpSECONDARYBUFFER[no]);
break;
case SOUND_MODE_PLAY: // 再生 (Playback)
AudioBackend_StopSound(lpSECONDARYBUFFER[no]);
AudioBackend_RewindSound(lpSECONDARYBUFFER[no]);
AudioBackend_PlaySound(lpSECONDARYBUFFER[no], FALSE);
break;
case SOUND_MODE_PLAY_LOOP:// ループ再生 (Loop playback)
AudioBackend_PlaySound(lpSECONDARYBUFFER[no], TRUE);
break;
}
}
}
void ChangeSoundFrequency(int no, unsigned long rate) // 100がMIN9999がMAXで2195?がﾉｰﾏﾙ (100 is MIN, 9999 is MAX, and 2195 is normal)
{
if (!audio_backend_initialised)
return;
AudioBackend_SetSoundFrequency(lpSECONDARYBUFFER[no], (rate * 10) + 100);
}
void ChangeSoundVolume(int no, long volume) // 300がMAXで300がﾉｰﾏﾙ (300 is MAX and 300 is normal)
{
if (!audio_backend_initialised)
return;
AudioBackend_SetSoundVolume(lpSECONDARYBUFFER[no], (volume - 300) * 8);
}
void ChangeSoundPan(int no, long pan) // 512がMAXで256がﾉｰﾏﾙ (512 is MAX and 256 is normal)
{
if (!audio_backend_initialised)
return;
AudioBackend_SetSoundPan(lpSECONDARYBUFFER[no], (pan - 256) * 10);
}
// TODO - The stack frame for this function is inaccurate
int MakePixToneObject(const PIXTONEPARAMETER *ptp, int ptp_num, int no)
{
int sample_count;
int i, j;
const PIXTONEPARAMETER *ptp_pointer;
unsigned char *pcm_buffer;
unsigned char *mixed_pcm_buffer;
if (!audio_backend_initialised)
return 0;
ptp_pointer = ptp;
sample_count = 0;
for (i = 0; i < ptp_num; i++)
{
if (ptp_pointer->size > sample_count)
sample_count = ptp_pointer->size;
++ptp_pointer;
}
pcm_buffer = mixed_pcm_buffer = NULL;
pcm_buffer = (unsigned char*)malloc(sample_count);
mixed_pcm_buffer = (unsigned char*)malloc(sample_count);
if (pcm_buffer == NULL || mixed_pcm_buffer == NULL)
{
if (pcm_buffer != NULL)
free(pcm_buffer);
if (mixed_pcm_buffer != NULL)
free(mixed_pcm_buffer);
return -1;
}
memset(pcm_buffer, 0x80, sample_count);
memset(mixed_pcm_buffer, 0x80, sample_count);
ptp_pointer = ptp;
for (i = 0; i < ptp_num; i++)
{
if (!MakePixelWaveData(ptp_pointer, pcm_buffer))
{
if (pcm_buffer != NULL) // This is always true
free(pcm_buffer);
if (mixed_pcm_buffer != NULL) // This is always true
free(mixed_pcm_buffer);
return -1;
}
for (j = 0; j < ptp_pointer->size; j++)
{
if ((int)(pcm_buffer[j] + mixed_pcm_buffer[j]) - 0x100 < -0x7F)
mixed_pcm_buffer[j] = 0;
else if ((int)(pcm_buffer[j] + mixed_pcm_buffer[j]) - 0x100 > 0x7F)
mixed_pcm_buffer[j] = 0xFF;
else
mixed_pcm_buffer[j] = mixed_pcm_buffer[j] + pcm_buffer[j] - 0x80;
}
++ptp_pointer;
}
// This is self-assignment, so redundant. Maybe this used to be something to prevent audio popping ?
mixed_pcm_buffer[0] = mixed_pcm_buffer[0];
mixed_pcm_buffer[sample_count - 1] = mixed_pcm_buffer[sample_count - 1];
lpSECONDARYBUFFER[no] = AudioBackend_CreateSound(22050, mixed_pcm_buffer, sample_count);
if (pcm_buffer != NULL)
free(pcm_buffer);
if (mixed_pcm_buffer != NULL)
free(mixed_pcm_buffer);
if (lpSECONDARYBUFFER[no] == NULL)
return -1;
return sample_count;
}