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Minor simplification to the custom backend example.

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This commit is contained in:
David Reid
2021-01-31 10:17:28 +10:00
parent ddb8f845f7
commit c715ead0e8
1 changed files with 4 additions and 15 deletions
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examples/custom_backend.c
+4 -15
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@@ -366,22 +366,11 @@ static ma_result ma_device_init_internal__sdl(ma_device_ex* pDeviceEx, const ma_
Note that options 2 and 3 require knowledge of the sample rate in order to convert it to a frame count. You should try to keep the
calculation of the period size as accurate as possible, but sometimes it's just not practical so just use whatever you can.
A helper function called ma_calculate_buffer_size_in_frames_from_descriptor() is available to do all of this for you which is what
we'll be using here.
*/
if (pDescriptor->periodSizeInFrames == 0) {
if (pDescriptor->periodSizeInMilliseconds == 0) {
/* The default period size has been requested. I don't think SDL has an API to retrieve this, so just using defaults defined by miniaudio. */
if (pConfig->performanceProfile == ma_performance_profile_low_latency) {
pDescriptor->periodSizeInFrames = ma_calculate_buffer_size_in_frames_from_milliseconds(MA_DEFAULT_PERIOD_SIZE_IN_MILLISECONDS_LOW_LATENCY, pDescriptor->sampleRate);
} else {
pDescriptor->periodSizeInFrames = ma_calculate_buffer_size_in_frames_from_milliseconds(MA_DEFAULT_PERIOD_SIZE_IN_MILLISECONDS_CONSERVATIVE, pDescriptor->sampleRate);
}
} else {
/* An explicit period size in milliseconds was specified. */
pDescriptor->periodSizeInFrames = ma_calculate_buffer_size_in_frames_from_milliseconds(pDescriptor->periodSizeInMilliseconds, pDescriptor->sampleRate);
}
} else {
/* Nothing to do here. An explicit period size in frames was specified. */
}
pDescriptor->periodSizeInFrames = ma_calculate_buffer_size_in_frames_from_descriptor(pDescriptor, pDescriptor->sampleRate, pConfig->performanceProfile);
/* SDL wants the buffer size to be a power of 2 for some reason. */
if (pDescriptor->periodSizeInFrames > 32768) {