104 lines
3.5 KiB
C++
104 lines
3.5 KiB
C++
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/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/audio_device/android/opensles_common.h"
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#include <SLES/OpenSLES.h>
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#include "rtc_base/arraysize.h"
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#include "rtc_base/checks.h"
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namespace webrtc {
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// Returns a string representation given an integer SL_RESULT_XXX code.
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// The mapping can be found in <SLES/OpenSLES.h>.
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const char* GetSLErrorString(size_t code) {
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static const char* sl_error_strings[] = {
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"SL_RESULT_SUCCESS", // 0
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"SL_RESULT_PRECONDITIONS_VIOLATED", // 1
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"SL_RESULT_PARAMETER_INVALID", // 2
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"SL_RESULT_MEMORY_FAILURE", // 3
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"SL_RESULT_RESOURCE_ERROR", // 4
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"SL_RESULT_RESOURCE_LOST", // 5
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"SL_RESULT_IO_ERROR", // 6
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"SL_RESULT_BUFFER_INSUFFICIENT", // 7
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"SL_RESULT_CONTENT_CORRUPTED", // 8
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"SL_RESULT_CONTENT_UNSUPPORTED", // 9
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"SL_RESULT_CONTENT_NOT_FOUND", // 10
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"SL_RESULT_PERMISSION_DENIED", // 11
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"SL_RESULT_FEATURE_UNSUPPORTED", // 12
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"SL_RESULT_INTERNAL_ERROR", // 13
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"SL_RESULT_UNKNOWN_ERROR", // 14
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"SL_RESULT_OPERATION_ABORTED", // 15
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"SL_RESULT_CONTROL_LOST", // 16
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};
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if (code >= arraysize(sl_error_strings)) {
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return "SL_RESULT_UNKNOWN_ERROR";
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}
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return sl_error_strings[code];
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}
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SLDataFormat_PCM CreatePCMConfiguration(size_t channels,
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int sample_rate,
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size_t bits_per_sample) {
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RTC_CHECK_EQ(bits_per_sample, SL_PCMSAMPLEFORMAT_FIXED_16);
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SLDataFormat_PCM format;
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format.formatType = SL_DATAFORMAT_PCM;
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format.numChannels = static_cast<SLuint32>(channels);
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// Note that, the unit of sample rate is actually in milliHertz and not Hertz.
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switch (sample_rate) {
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case 8000:
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format.samplesPerSec = SL_SAMPLINGRATE_8;
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break;
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case 16000:
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format.samplesPerSec = SL_SAMPLINGRATE_16;
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break;
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case 22050:
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format.samplesPerSec = SL_SAMPLINGRATE_22_05;
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break;
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case 32000:
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format.samplesPerSec = SL_SAMPLINGRATE_32;
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break;
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case 44100:
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format.samplesPerSec = SL_SAMPLINGRATE_44_1;
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break;
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case 48000:
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format.samplesPerSec = SL_SAMPLINGRATE_48;
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break;
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case 64000:
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format.samplesPerSec = SL_SAMPLINGRATE_64;
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break;
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case 88200:
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format.samplesPerSec = SL_SAMPLINGRATE_88_2;
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break;
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case 96000:
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format.samplesPerSec = SL_SAMPLINGRATE_96;
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break;
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default:
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RTC_CHECK(false) << "Unsupported sample rate: " << sample_rate;
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break;
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}
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format.bitsPerSample = SL_PCMSAMPLEFORMAT_FIXED_16;
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format.containerSize = SL_PCMSAMPLEFORMAT_FIXED_16;
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format.endianness = SL_BYTEORDER_LITTLEENDIAN;
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if (format.numChannels == 1) {
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format.channelMask = SL_SPEAKER_FRONT_CENTER;
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} else if (format.numChannels == 2) {
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format.channelMask = SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
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} else {
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RTC_CHECK(false) << "Unsupported number of channels: "
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<< format.numChannels;
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}
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return format;
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}
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} // namespace webrtc
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