| /* |
| * 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. |
| */ |
| |
| #ifndef WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_AUDIO_RECORD_JNI_H_ |
| #define WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_AUDIO_RECORD_JNI_H_ |
| |
| #include <jni.h> |
| |
| #include "webrtc/base/thread_checker.h" |
| #include "webrtc/modules/audio_device/android/audio_manager.h" |
| #include "webrtc/modules/audio_device/include/audio_device_defines.h" |
| #include "webrtc/modules/audio_device/audio_device_generic.h" |
| #include "webrtc/modules/utility/interface/helpers_android.h" |
| #include "webrtc/modules/utility/interface/jvm_android.h" |
| |
| namespace webrtc { |
| |
| // Implements 16-bit mono PCM audio input support for Android using the Java |
| // AudioRecord interface. Most of the work is done by its Java counterpart in |
| // WebRtcAudioRecord.java. This class is created and lives on a thread in |
| // C++-land, but recorded audio buffers are delivered on a high-priority |
| // thread managed by the Java class. |
| // |
| // The Java class makes use of AudioEffect features (mainly AEC) which are |
| // first available in Jelly Bean. If it is instantiated running against earlier |
| // SDKs, the AEC provided by the APM in WebRTC must be used and enabled |
| // separately instead. |
| // |
| // An instance must be created and destroyed on one and the same thread. |
| // All public methods must also be called on the same thread. A thread checker |
| // will DCHECK if any method is called on an invalid thread. |
| // |
| // This class uses AttachCurrentThreadIfNeeded to attach to a Java VM if needed |
| // and detach when the object goes out of scope. Additional thread checking |
| // guarantees that no other (possibly non attached) thread is used. |
| class AudioRecordJni { |
| public: |
| // Wraps the Java specific parts of the AudioRecordJni into one helper class. |
| class JavaAudioRecord { |
| public: |
| JavaAudioRecord(NativeRegistration* native_registration, |
| rtc::scoped_ptr<GlobalRef> audio_track); |
| ~JavaAudioRecord(); |
| |
| int InitRecording(int sample_rate, int channels); |
| bool StartRecording(); |
| bool StopRecording(); |
| bool EnableBuiltInAEC(bool enable); |
| |
| private: |
| rtc::scoped_ptr<GlobalRef> audio_record_; |
| jmethodID init_recording_; |
| jmethodID start_recording_; |
| jmethodID stop_recording_; |
| jmethodID enable_built_in_aec_; |
| }; |
| |
| explicit AudioRecordJni(AudioManager* audio_manager); |
| ~AudioRecordJni(); |
| |
| int32_t Init(); |
| int32_t Terminate(); |
| |
| int32_t InitRecording(); |
| bool RecordingIsInitialized() const { return initialized_; } |
| |
| int32_t StartRecording(); |
| int32_t StopRecording(); |
| bool Recording() const { return recording_; } |
| |
| void AttachAudioBuffer(AudioDeviceBuffer* audioBuffer); |
| |
| int32_t EnableBuiltInAEC(bool enable); |
| |
| private: |
| // Called from Java side so we can cache the address of the Java-manged |
| // |byte_buffer| in |direct_buffer_address_|. The size of the buffer |
| // is also stored in |direct_buffer_capacity_in_bytes_|. |
| // This method will be called by the WebRtcAudioRecord constructor, i.e., |
| // on the same thread that this object is created on. |
| static void JNICALL CacheDirectBufferAddress( |
| JNIEnv* env, jobject obj, jobject byte_buffer, jlong nativeAudioRecord); |
| void OnCacheDirectBufferAddress(JNIEnv* env, jobject byte_buffer); |
| |
| // Called periodically by the Java based WebRtcAudioRecord object when |
| // recording has started. Each call indicates that there are |length| new |
| // bytes recorded in the memory area |direct_buffer_address_| and it is |
| // now time to send these to the consumer. |
| // This method is called on a high-priority thread from Java. The name of |
| // the thread is 'AudioRecordThread'. |
| static void JNICALL DataIsRecorded( |
| JNIEnv* env, jobject obj, jint length, jlong nativeAudioRecord); |
| void OnDataIsRecorded(int length); |
| |
| // Stores thread ID in constructor. |
| rtc::ThreadChecker thread_checker_; |
| |
| // Stores thread ID in first call to OnDataIsRecorded() from high-priority |
| // thread in Java. Detached during construction of this object. |
| rtc::ThreadChecker thread_checker_java_; |
| |
| // Calls AttachCurrentThread() if this thread is not attached at construction. |
| // Also ensures that DetachCurrentThread() is called at destruction. |
| AttachCurrentThreadIfNeeded attach_thread_if_needed_; |
| |
| // Wraps the JNI interface pointer and methods associated with it. |
| rtc::scoped_ptr<JNIEnvironment> j_environment_; |
| |
| // Contains factory method for creating the Java object. |
| rtc::scoped_ptr<NativeRegistration> j_native_registration_; |
| |
| // Wraps the Java specific parts of the AudioRecordJni class. |
| rtc::scoped_ptr<AudioRecordJni::JavaAudioRecord> j_audio_record_; |
| |
| // Raw pointer to the audio manger. |
| const AudioManager* audio_manager_; |
| |
| // Contains audio parameters provided to this class at construction by the |
| // AudioManager. |
| const AudioParameters audio_parameters_; |
| |
| // Delay estimate of the total round-trip delay (input + output). |
| // Fixed value set once in AttachAudioBuffer() and it can take one out of two |
| // possible values. See audio_common.h for details. |
| int total_delay_in_milliseconds_; |
| |
| // Cached copy of address to direct audio buffer owned by |j_audio_record_|. |
| void* direct_buffer_address_; |
| |
| // Number of bytes in the direct audio buffer owned by |j_audio_record_|. |
| size_t direct_buffer_capacity_in_bytes_; |
| |
| // Number audio frames per audio buffer. Each audio frame corresponds to |
| // one sample of PCM mono data at 16 bits per sample. Hence, each audio |
| // frame contains 2 bytes (given that the Java layer only supports mono). |
| // Example: 480 for 48000 Hz or 441 for 44100 Hz. |
| size_t frames_per_buffer_; |
| |
| bool initialized_; |
| |
| bool recording_; |
| |
| // Raw pointer handle provided to us in AttachAudioBuffer(). Owned by the |
| // AudioDeviceModuleImpl class and called by AudioDeviceModuleImpl::Create(). |
| AudioDeviceBuffer* audio_device_buffer_; |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_AUDIO_RECORD_JNI_H_ |