stevenhowes/CTheEscape
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Proper sound for phasers and explosions. Multi-channel audio.

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stevenhowes
2021-05-17 20:48:48 +01:00
parent bcc7a72ae1
commit efc2e685e4
9 changed files with 100 additions and 61 deletions
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!TheEsc/c/Sound
+56 -13
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@@ -13,7 +13,7 @@ int composition_startcent = -1;
struct CompositionElement composition[COMPOSITION_MAX];
unsigned char audiobuffer[20000];
struct pcmsample_s pcmsamples[PCMSAMPLE_MAX];
char *notes[] = {"AX","A#","BX","CX","C#","DX","D#","EX","FX","F#","GX","G#"};
@@ -28,7 +28,7 @@ void sound_composition_load(char* filename)
int length;
// Attempt to get file info
inreg.r[0] = 13;
inreg.r[0] = 5;
inreg.r[1] = (int) filename;
_kernel_swi(OS_File,&inreg,&outreg);
@@ -38,8 +38,8 @@ void sound_composition_load(char* filename)
if(length > sizeof(composition))
{
screen_nobuffer();
printf("Composition exceeds %d bytes (%d bytes)",sizeof(composition),length);
exit(0);
while(1)
printf("Composition exceeds %d bytes (%d bytes)\n",sizeof(composition),length);
}
// Attempt to get file info
@@ -198,12 +198,55 @@ int sound_composition_incomplete()
return 1;
}
void sound_pcm_loadsample(char* filename)
void sound_pcm_unset(enum pcmchannel_e channel)
{
inreg.r[0] = channel;
inreg.r[1] = 0;
_kernel_swi (DataVox_Unset, &inreg, &outreg);
}
void sound_pcm_playsample(enum pcmchannel_e channel, enum pcmsample_e sample)
{
inreg.r[0] = channel;
inreg.r[1] = pcmsamples[sample].data;
inreg.r[2] = pcmsamples[sample].data + pcmsamples[sample].length;
_kernel_swi (DataVox_SetMemory, &inreg, &outreg);
// Unsigned 8-bit PCM
inreg.r[0] = channel;
inreg.r[1] = 1;
_kernel_swi (DataVox_Type, &inreg, &outreg);
// Not timed
inreg.r[0] = channel;
inreg.r[1] = 0;
_kernel_swi (DataVox_Timed, &inreg, &outreg);
// Bitrate
inreg.r[0] = channel;
inreg.r[1] = 4000; // I was expecting this to be 125 to 8KHz but.... No idea
_kernel_swi (DataVox_Pitch, &inreg, &outreg);
// Play it
inreg.r[0] = channel;
inreg.r[1] = -15;
inreg.r[2] = 1;
inreg.r[3] = 1;
_kernel_swi (Sound_Control, &inreg, &outreg);
}
void sound_pcm_playsample_ifidle(enum pcmchannel_e channel, enum pcmsample_e sample)
{
inreg.r[0] = channel;
_kernel_swi (DataVox_ReadAddress, &inreg, &outreg);
if(!outreg.r[1])
sound_pcm_playsample(channel, sample);
}
void sound_pcm_loadsample(enum pcmsample_e sample, char* filename)
{
int length;
memset(audiobuffer,0x00,20000);
// Attempt to get file info
inreg.r[0] = 5;
inreg.r[1] = (int) filename;
@@ -212,21 +255,21 @@ void sound_pcm_loadsample(char* filename)
// Length will be in R4 if it exists
length = outreg.r[4];
if(length > sizeof(audiobuffer))
if(length > 100000)
{
screen_nobuffer();
while (1)
printf("Sample exceeds %d bytes (%d bytes) object type is %d\n",sizeof(audiobuffer),length,outreg.r[0]);
printf("Sample exceeds %d bytes (%d bytes) object type is %d\n",100000,length,outreg.r[0]);
}
pcmsamples[sample].length = length;
pcmsamples[sample].data = malloc(length);
// Attempt to get file info
inreg.r[0] = 16;
inreg.r[1] = (int) filename;
inreg.r[2] = (int) audiobuffer;
inreg.r[2] = (int) pcmsamples[sample].data;
inreg.r[3] = 0;
_kernel_swi(OS_File,&inreg,&outreg);
// Fill remainder of array with final byte
memset(audiobuffer + length,audiobuffer[length-1],sizeof(audiobuffer)-length);
}