src/media/audio/android/audio_record_input.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "media/audio/android/audio_record_input.h"
   6
   7 #include "base/logging.h"
   8 #include "jni/AudioRecordInput_jni.h"
   9 #include "media/audio/android/audio_manager_android.h"
  10 #include "media/base/audio_bus.h"
  11
  12 namespace media {
  13
  14 AudioRecordInputStream::AudioRecordInputStream(
  15     AudioManagerAndroid* audio_manager,
  16     const AudioParameters& params)
  17     : audio_manager_(audio_manager),
  18       callback_(NULL),
  19       direct_buffer_address_(NULL),
  20       audio_bus_(media::AudioBus::Create(params)),
  21       bytes_per_sample_(params.bits_per_sample() / 8) {
  22   DVLOG(2) << __PRETTY_FUNCTION__;
  23   DCHECK(params.IsValid());
  24   j_audio_record_.Reset(
  25       Java_AudioRecordInput_createAudioRecordInput(
  26           base::android::AttachCurrentThread(),
  27           reinterpret_cast<intptr_t>(this),
  28           params.sample_rate(),
  29           params.channels(),
  30           params.bits_per_sample(),
  31           params.GetBytesPerBuffer(),
  32           params.effects() & AudioParameters::ECHO_CANCELLER));
  33 }
  34
  35 AudioRecordInputStream::~AudioRecordInputStream() {
  36   DVLOG(2) << __PRETTY_FUNCTION__;
  37   DCHECK(thread_checker_.CalledOnValidThread());
  38 }
  39
  40 void AudioRecordInputStream::CacheDirectBufferAddress(JNIEnv* env, jobject obj,
  41                                                       jobject byte_buffer) {
  42   DCHECK(thread_checker_.CalledOnValidThread());
  43   direct_buffer_address_ = static_cast<uint8*>(
  44       env->GetDirectBufferAddress(byte_buffer));
  45 }
  46
  47 // static
  48 bool AudioRecordInputStream::RegisterAudioRecordInput(JNIEnv* env) {
  49   return RegisterNativesImpl(env);
  50 }
  51
  52 void AudioRecordInputStream::OnData(JNIEnv* env, jobject obj, jint size,
  53                                     jint hardware_delay_bytes) {
  54   DCHECK(direct_buffer_address_);
  55   DCHECK_EQ(size,
  56             audio_bus_->frames() * audio_bus_->channels() * bytes_per_sample_);
  57   // Passing zero as the volume parameter indicates there is no access to a
  58   // hardware volume slider.
  59   audio_bus_->FromInterleaved(
  60       direct_buffer_address_, audio_bus_->frames(), bytes_per_sample_);
  61   callback_->OnData(this, audio_bus_.get(), hardware_delay_bytes, 0.0);
  62 }
  63
  64 bool AudioRecordInputStream::Open() {
  65   DVLOG(2) << __PRETTY_FUNCTION__;
  66   DCHECK(thread_checker_.CalledOnValidThread());
  67   return Java_AudioRecordInput_open(
  68       base::android::AttachCurrentThread(), j_audio_record_.obj());
  69 }
  70
  71 void AudioRecordInputStream::Start(AudioInputCallback* callback) {
  72   DVLOG(2) << __PRETTY_FUNCTION__;
  73   DCHECK(thread_checker_.CalledOnValidThread());
  74   DCHECK(callback);
  75
  76   if (callback_) {
  77     // Start() was already called.
  78     DCHECK_EQ(callback_, callback);
  79     return;
  80   }
  81   // The Java thread has not yet started, so we are free to set |callback_|.
  82   callback_ = callback;
  83
  84   Java_AudioRecordInput_start(
  85       base::android::AttachCurrentThread(), j_audio_record_.obj());
  86 }
  87
  88 void AudioRecordInputStream::Stop() {
  89   DVLOG(2) << __PRETTY_FUNCTION__;
  90   DCHECK(thread_checker_.CalledOnValidThread());
  91   if (!callback_) {
  92     // Start() was never called, or Stop() was already called.
  93     return;
  94   }
  95
  96   Java_AudioRecordInput_stop(
  97       base::android::AttachCurrentThread(), j_audio_record_.obj());
  98
  99   // The Java thread must have been stopped at this point, so we are free to
 100   // clear |callback_|.
 101   callback_ = NULL;
 102 }
 103
 104 void AudioRecordInputStream::Close() {
 105   DVLOG(2) << __PRETTY_FUNCTION__;
 106   DCHECK(thread_checker_.CalledOnValidThread());
 107   Stop();
 108   DCHECK(!callback_);
 109   Java_AudioRecordInput_close(
 110       base::android::AttachCurrentThread(), j_audio_record_.obj());
 111   audio_manager_->ReleaseInputStream(this);
 112 }
 113
 114 double AudioRecordInputStream::GetMaxVolume() {
 115   NOTIMPLEMENTED();
 116   return 0.0;
 117 }
 118
 119 void AudioRecordInputStream::SetVolume(double volume) {
 120   NOTIMPLEMENTED();
 121 }
 122
 123 double AudioRecordInputStream::GetVolume() {
 124   NOTIMPLEMENTED();
 125   return 0.0;
 126 }
 127
 128 void AudioRecordInputStream::SetAutomaticGainControl(bool enabled) {
 129   NOTIMPLEMENTED();
 130 }
 131
 132 bool AudioRecordInputStream::GetAutomaticGainControl() {
 133   NOTIMPLEMENTED();
 134   return false;
 135 }
 136
 137 }  // namespace media