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OpenSL ES audio cleanup and added a note with low latency audio discussion
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@ -22,6 +22,10 @@
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#if SDL_AUDIO_DRIVER_OPENSLES
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#if SDL_AUDIO_DRIVER_OPENSLES
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/* For more discussion of low latency audio on Android, see this:
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https://googlesamples.github.io/android-audio-high-performance/guides/opensl_es.html
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*/
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#include "SDL_audio.h"
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#include "SDL_audio.h"
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#include "../SDL_audio_c.h"
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#include "../SDL_audio_c.h"
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#include "SDL_openslES.h"
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#include "SDL_openslES.h"
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@ -290,8 +294,9 @@ openslES_CreatePCMPlayer(_THIS)
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#define SL_SPEAKER_TOP_BACK_CENTER ((SLuint32) 0x00010000)
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#define SL_SPEAKER_TOP_BACK_CENTER ((SLuint32) 0x00010000)
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#define SL_SPEAKER_TOP_BACK_RIGHT ((SLuint32) 0x00020000)
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#define SL_SPEAKER_TOP_BACK_RIGHT ((SLuint32) 0x00020000)
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*/
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*/
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#define SL_ANDROID_SPEAKER_QUAD (SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT | SL_SPEAKER_BACK_LEFT | SL_SPEAKER_BACK_RIGHT)
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#define SL_ANDROID_SPEAKER_STEREO (SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT)
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#define SL_ANDROID_SPEAKER_5DOT1 (SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT | SL_SPEAKER_FRONT_CENTER | SL_SPEAKER_LOW_FREQUENCY| SL_SPEAKER_BACK_LEFT | SL_SPEAKER_BACK_RIGHT)
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#define SL_ANDROID_SPEAKER_QUAD (SL_ANDROID_SPEAKER_STEREO | SL_SPEAKER_BACK_LEFT | SL_SPEAKER_BACK_RIGHT)
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#define SL_ANDROID_SPEAKER_5DOT1 (SL_ANDROID_SPEAKER_QUAD | SL_SPEAKER_FRONT_CENTER | SL_SPEAKER_LOW_FREQUENCY)
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#define SL_ANDROID_SPEAKER_7DOT1 (SL_ANDROID_SPEAKER_5DOT1 | SL_SPEAKER_SIDE_LEFT | SL_SPEAKER_SIDE_RIGHT)
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#define SL_ANDROID_SPEAKER_7DOT1 (SL_ANDROID_SPEAKER_5DOT1 | SL_SPEAKER_SIDE_LEFT | SL_SPEAKER_SIDE_RIGHT)
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switch (this->spec.channels)
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switch (this->spec.channels)
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@ -300,10 +305,10 @@ openslES_CreatePCMPlayer(_THIS)
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format_pcm.channelMask = SL_SPEAKER_FRONT_LEFT;
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format_pcm.channelMask = SL_SPEAKER_FRONT_LEFT;
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break;
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break;
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case 2:
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case 2:
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format_pcm.channelMask = SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
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format_pcm.channelMask = SL_ANDROID_SPEAKER_STEREO;
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break;
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break;
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case 3:
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case 3:
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format_pcm.channelMask = SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT | SL_SPEAKER_FRONT_CENTER;
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format_pcm.channelMask = SL_ANDROID_SPEAKER_STEREO | SL_SPEAKER_FRONT_CENTER;
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break;
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break;
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case 4:
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case 4:
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format_pcm.channelMask = SL_ANDROID_SPEAKER_QUAD;
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format_pcm.channelMask = SL_ANDROID_SPEAKER_QUAD;
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