media/midi/midi_input_port_android.cc

   1 // Copyright 2015 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/midi/midi_input_port_android.h"
   6
   7 #include "base/android/jni_array.h"
   8 #include "base/time/time.h"
   9 #include "jni/MidiInputPortAndroid_jni.h"
  10
  11 namespace media {
  12 namespace midi {
  13
  14 MidiInputPortAndroid::MidiInputPortAndroid(JNIEnv* env,
  15                                            jobject raw,
  16                                            Delegate* delegate)
  17     : raw_port_(env, raw), delegate_(delegate) {}
  18
  19 MidiInputPortAndroid::~MidiInputPortAndroid() {
  20   Close();
  21 }
  22
  23 bool MidiInputPortAndroid::Open() {
  24   JNIEnv* env = base::android::AttachCurrentThread();
  25   return Java_MidiInputPortAndroid_open(env, raw_port_.obj(),
  26                                         reinterpret_cast<jlong>(this));
  27 }
  28
  29 void MidiInputPortAndroid::Close() {
  30   JNIEnv* env = base::android::AttachCurrentThread();
  31   Java_MidiInputPortAndroid_close(env, raw_port_.obj());
  32 }
  33
  34 void MidiInputPortAndroid::OnData(JNIEnv* env,
  35                                   jobject caller,
  36                                   jbyteArray data,
  37                                   jint offset,
  38                                   jint size,
  39                                   jlong timestamp) {
  40   std::vector<uint8> bytes;
  41   base::android::JavaByteArrayToByteVector(env, data, &bytes);
  42
  43   if (size == 0) {
  44     return;
  45   }
  46
  47   // TimeTick's internal value is in microseconds, |timestamp| is in
  48   // nanoseconds. Both are monotonic.
  49   base::TimeTicks timestamp_to_pass = base::TimeTicks::FromInternalValue(
  50       timestamp / base::TimeTicks::kNanosecondsPerMicrosecond);
  51   delegate_->OnReceivedData(this, &bytes[offset], size, timestamp_to_pass);
  52 }
  53
  54 bool MidiInputPortAndroid::Register(JNIEnv* env) {
  55   return RegisterNativesImpl(env);
  56 }
  57
  58 }  // namespace midi
  59 }  // namespace media