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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/audio/android/opensles_util.h"
namespace media {
#define SL_ANDROID_SPEAKER_QUAD \
(SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT | SL_SPEAKER_BACK_LEFT | \
SL_SPEAKER_BACK_RIGHT)
#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)
#define SL_ANDROID_SPEAKER_7DOT1 \
(SL_ANDROID_SPEAKER_5DOT1 | SL_SPEAKER_SIDE_LEFT | SL_SPEAKER_SIDE_RIGHT)
// Ported from:
// https://android.googlesource.com/platform/frameworks/wilhelm/+/refs/heads/master/src/android/channels.h
// https://android.googlesource.com/platform/frameworks/wilhelm/+/refs/heads/master/src/android/channels.c
SLuint32 ChannelCountToSLESChannelMask(int channel_count) {
if (channel_count > 2) {
LOG(WARNING) << "Guessing channel layout for " << channel_count
<< " channels; speaker order may be incorrect.";
}
switch (channel_count) {
case 1:
return SL_SPEAKER_FRONT_LEFT;
case 2:
return SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
case 3:
return SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT |
SL_SPEAKER_FRONT_CENTER;
case 4:
return SL_ANDROID_SPEAKER_QUAD;
case 5:
return SL_ANDROID_SPEAKER_QUAD | SL_SPEAKER_FRONT_CENTER;
case 6:
return SL_ANDROID_SPEAKER_5DOT1;
case 7:
return SL_ANDROID_SPEAKER_5DOT1 | SL_SPEAKER_BACK_CENTER;
case 8:
return SL_ANDROID_SPEAKER_7DOT1;
}
return 0;
}
} // namespace media
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