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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 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. 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) { pDescriptor->periodSizeInFrames = ma_calculate_buffer_size_in_frames_from_descriptor(pDescriptor, pDescriptor->sampleRate, pConfig->performanceProfile);
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. */
}
/* SDL wants the buffer size to be a power of 2 for some reason. */ /* SDL wants the buffer size to be a power of 2 for some reason. */
if (pDescriptor->periodSizeInFrames > 32768) { if (pDescriptor->periodSizeInFrames > 32768) {