1 /* 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef MODULES_AUDIO_DEVICE_ANDROID_OPENSLES_COMMON_H_ 12 #define MODULES_AUDIO_DEVICE_ANDROID_OPENSLES_COMMON_H_ 13 14 #include <SLES/OpenSLES.h> 15 #include <stddef.h> 16 17 #include "rtc_base/checks.h" 18 19 namespace webrtc { 20 21 // Returns a string representation given an integer SL_RESULT_XXX code. 22 // The mapping can be found in <SLES/OpenSLES.h>. 23 const char* GetSLErrorString(size_t code); 24 25 // Configures an SL_DATAFORMAT_PCM structure based on native audio parameters. 26 SLDataFormat_PCM CreatePCMConfiguration(size_t channels, 27 int sample_rate, 28 size_t bits_per_sample); 29 30 // Helper class for using SLObjectItf interfaces. 31 template <typename SLType, typename SLDerefType> 32 class ScopedSLObject { 33 public: ScopedSLObject()34 ScopedSLObject() : obj_(nullptr) {} 35 ~ScopedSLObject()36 ~ScopedSLObject() { Reset(); } 37 Receive()38 SLType* Receive() { 39 RTC_DCHECK(!obj_); 40 return &obj_; 41 } 42 43 SLDerefType operator->() { return *obj_; } 44 Get()45 SLType Get() const { return obj_; } 46 Reset()47 void Reset() { 48 if (obj_) { 49 (*obj_)->Destroy(obj_); 50 obj_ = nullptr; 51 } 52 } 53 54 private: 55 SLType obj_; 56 }; 57 58 typedef ScopedSLObject<SLObjectItf, const SLObjectItf_*> ScopedSLObjectItf; 59 60 } // namespace webrtc 61 62 #endif // MODULES_AUDIO_DEVICE_ANDROID_OPENSLES_COMMON_H_ 63