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/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/modules/audio_device/android/opensles_common.h"
#include <assert.h>
#include "webrtc/modules/audio_device/android/audio_common.h"
using webrtc::kNumChannels;
namespace webrtc_opensl {
SLDataFormat_PCM CreatePcmConfiguration(int sample_rate) {
SLDataFormat_PCM configuration;
configuration.formatType = SL_DATAFORMAT_PCM;
configuration.numChannels = kNumChannels;
// According to the opensles documentation in the ndk:
// samplesPerSec is actually in units of milliHz, despite the misleading name.
// It further recommends using constants. However, this would lead to a lot
// of boilerplate code so it is not done here.
configuration.samplesPerSec = sample_rate * 1000;
configuration.bitsPerSample = SL_PCMSAMPLEFORMAT_FIXED_16;
configuration.containerSize = SL_PCMSAMPLEFORMAT_FIXED_16;
configuration.channelMask = SL_SPEAKER_FRONT_CENTER;
if (2 == configuration.numChannels) {
configuration.channelMask =
SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
}
configuration.endianness = SL_BYTEORDER_LITTLEENDIAN;
return configuration;
}
} // namespace webrtc_opensl
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