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audio: fix popping sounds caused by signed/unsigned conversion

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When converting audio from signed to unsigned values of vice-versa
the silence value chosen by SDL was the value of the device, not
of the stream that the data was being put into. After conversion
this would lead to a very high or low value, making the speaker
jump to a extreme positon, leading to an audible noise whenever
creating, destroying or playing scilence on a device that reqired
such conversion.
This commit is contained in:
Manuel V?gele 2020-09-26 09:30:08 +02:00
parent f311e0a826
commit 554037a6f7
1 changed files with 2 additions and 2 deletions
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4
src/audio/SDL_audio.c
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@ -577,7 +577,7 @@ SDL_BufferQueueDrainCallback(void *userdata, Uint8 *stream, int len)
if (len > 0) { /* fill any remaining space in the stream with silence. */
SDL_assert(SDL_CountDataQueue(device->buffer_queue) == 0);
SDL_memset(stream, device->spec.silence, len);
SDL_memset(stream, device->callbackspec.silence, len);
}
}
@ -733,7 +733,7 @@ SDL_RunAudio(void *devicep)
/* !!! FIXME: this should be LockDevice. */
SDL_LockMutex(device->mixer_lock);
if (SDL_AtomicGet(&device->paused)) {
SDL_memset(data, device->spec.silence, data_len);
SDL_memset(data, device->callbackspec.silence, data_len);
} else {
callback(udata, data, data_len);
}