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Update miniaudio backend

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This commit is contained in:
Clownacy 2020-06-24 17:24:41 +01:00
parent 3fa4a91dc1
commit f64f924b54
1 changed files with 34 additions and 17 deletions
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51
src/Backends/Audio/miniaudio.cpp
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@ -23,13 +23,8 @@ static unsigned long output_frequency;
static void (*organya_callback)(void);
static unsigned int organya_callback_milliseconds;
static void Callback(ma_device *device, void *output_stream, const void *input_stream, ma_uint32 frames_total)
static void MixSoundsAndUpdateOrganya(long *stream, size_t frames_total)
{
(void)device;
(void)input_stream;
short *stream = (short*)output_stream;
ma_mutex_lock(&organya_mutex);
if (organya_callback_milliseconds == 0)
@ -68,20 +63,42 @@ static void Callback(ma_device *device, void *output_stream, const void *input_s
}
}
// Clamp output, and convert from 8-bit to 16-bit
for (unsigned int i = 0; i < frames_total * 2; ++i)
{
if (stream[i] > 0x7F)
stream[i] = 0x7F00;
else if (stream[i] < -0x7F)
stream[i] = -0x7F00;
else
stream[i] <<= 8;
}
ma_mutex_unlock(&organya_mutex);
}
static void Callback(ma_device *device, void *output_stream, const void *input_stream, ma_uint32 frames_total)
{
(void)device;
(void)input_stream;
short *stream = (short*)output_stream;
size_t frames_done = 0;
while (frames_done != frames_total)
{
long mix_buffer[0x800 * 2]; // 2 because stereo
size_t subframes = MIN(0x800, frames_total - frames_done);
memset(mix_buffer, 0, subframes * sizeof(long) * 2);
MixSoundsAndUpdateOrganya(mix_buffer, subframes);
for (size_t i = 0; i < subframes * 2; ++i)
{
if (mix_buffer[i] > 0x7FFF)
*stream++ = 0x7FFF;
else if (mix_buffer[i] < -0x7FFF)
*stream++ = -0x7FFF;
else
*stream++ = mix_buffer[i];
}
frames_done += subframes;
}
}
bool AudioBackend_Init(void)
{
ma_device_config config = ma_device_config_init(ma_device_type_playback);