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Fine-tune SDL sound output

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This commit is contained in:
simon.kagstrom 2010-03-13 12:31:47 +00:00
parent f731ceafa9
commit 5324a2e769
1 changed files with 5 additions and 4 deletions
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9
Src/SID_SDL.h
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@ -30,7 +30,7 @@
static SDL_AudioSpec spec; static SDL_AudioSpec spec;
#define FRODO_SNDBUF 512 #define FRODO_SNDBUF 512
#define SOUNDBUFSIZE 2048 #define SOUNDBUFSIZE 1024
#define N_BUFS 8 #define N_BUFS 8
static int16 soundbuffer[N_BUFS][FRODO_SNDBUF]; static int16 soundbuffer[N_BUFS][FRODO_SNDBUF];
@ -76,6 +76,7 @@ void DigitalRenderer::init_sound(void)
} }
this->sound_buffer = new int16[this->sndbufsize]; this->sound_buffer = new int16[this->sndbufsize];
memset(this->sound_buffer, 0, sizeof(int16) * this->sndbufsize);
ready = true; ready = true;
SDL_PauseAudio(0); SDL_PauseAudio(0);
} }
@ -137,12 +138,12 @@ void DigitalRenderer::PushVolume(uint8 vol)
int datalen = sndbufsize; int datalen = sndbufsize;
to_output -= datalen; to_output -= datalen;
SDL_LockAudio(); SDL_LockAudio();
calc_buffer(soundbuffer[head], datalen * 2); calc_buffer(soundbuffer[head], datalen * 2);
head = (head + 1) % N_BUFS; head = (head + 1) % N_BUFS;
if (head == tail) if (head == tail) {
printf("Uh oh, hit the tail\n"); tail = (head + 1) % N_BUFS;
}
SDL_UnlockAudio(); SDL_UnlockAudio();
} }
} }