1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*---------------------------------------------------------------------------*
* android_speech_srec_MicrophoneInputStream.cpp *
* *
* Copyright 2007 Nuance Communciations, Inc. *
* *
* Licensed under the Apache License, Version 2.0 (the 'License'); *
* you may not use this file except in compliance with the License. *
* *
* You may obtain a copy of the License at *
* http://www.apache.org/licenses/LICENSE-2.0 *
* *
* Unless required by applicable law or agreed to in writing, software *
* distributed under the License is distributed on an 'AS IS' BASIS, *
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
* See the License for the specific language governing permissions and *
* limitations under the License. *
* *
*---------------------------------------------------------------------------*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#define LOG_TAG "srec_jni"
#include <utils/Log.h>
#include <media/AudioRecord.h>
#include <media/mediarecorder.h>
#include <system/audio.h>
#include <jni.h>
using namespace android;
//
// helper function to throw an exception
//
static void throwException(JNIEnv *env, const char* ex, const char* fmt, int data) {
if (jclass cls = env->FindClass(ex)) {
char msg[1000];
sprintf(msg, fmt, data);
env->ThrowNew(cls, msg);
env->DeleteLocalRef(cls);
}
}
///////////////////////////////////////////////////////////////////////////////
// MicrophoneInputStream JNI implememtations
///////////////////////////////////////////////////////////////////////////////
// Java uses an int to hold a raw pointer, which is already ugly.
// But we need to hold an sp<>, which is of unknown size.
// So we wrap the sp<> within a class, and give Java the int version of a pointer to this class.
class AudioRecordWrapper {
public:
AudioRecordWrapper(AudioRecord *audioRecord) : mAudioRecord(audioRecord) { }
~AudioRecordWrapper() { }
AudioRecord* get() const { return mAudioRecord.get(); }
private:
const sp<AudioRecord> mAudioRecord;
};
static JNIEXPORT jint JNICALL Java_android_speech_srec_Recognizer_AudioRecordNew
(JNIEnv *env, jclass clazz, jint sampleRate, jint fifoFrames) {
AudioRecordWrapper *ar = new AudioRecordWrapper(new AudioRecord(
AUDIO_SOURCE_VOICE_RECOGNITION, sampleRate,
AUDIO_FORMAT_PCM_16_BIT, AUDIO_CHANNEL_IN_MONO,
fifoFrames));
status_t s = ar->get()->initCheck();
if (s != NO_ERROR) {
delete ar;
ar = NULL;
ALOGE("initCheck error %d ", s);
}
return (int)ar;
}
static JNIEXPORT int JNICALL Java_android_speech_srec_Recognizer_AudioRecordStart
(JNIEnv *env, jclass clazz, jint audioRecord) {
return (int)(((AudioRecordWrapper*)audioRecord)->get()->start());
}
static JNIEXPORT jint JNICALL Java_android_speech_srec_Recognizer_AudioRecordRead
(JNIEnv *env, jclass clazz, jint audioRecord, jbyteArray array, jint offset, jint length) {
jbyte buffer[4096];
if (length > (int)sizeof(buffer)) length = sizeof(buffer);
length = ((AudioRecordWrapper*)audioRecord)->get()->read(buffer, length);
if (length < 0) {
throwException(env, "java/io/IOException", "AudioRecord::read failed %d", length);
return -1;
}
env->SetByteArrayRegion(array, offset, length, buffer);
return length;
}
static JNIEXPORT void JNICALL Java_android_speech_srec_Recognizer_AudioRecordStop
(JNIEnv *env, jclass clazz, jint audioRecord) {
((AudioRecordWrapper*)audioRecord)->get()->stop();
}
static JNIEXPORT void JNICALL Java_android_speech_srec_Recognizer_AudioRecordDelete
(JNIEnv *env, jclass clazz, jint audioRecord) {
delete (AudioRecordWrapper*)audioRecord;
}
/*
* Table of methods associated with a single class.
*/
static JNINativeMethod gMethods[] = {
/* name, signature, funcPtr */
{"AudioRecordNew", "(II)I", (void*)Java_android_speech_srec_Recognizer_AudioRecordNew},
{"AudioRecordStart", "(I)I", (void*)Java_android_speech_srec_Recognizer_AudioRecordStart},
{"AudioRecordRead", "(I[BII)I", (void*)Java_android_speech_srec_Recognizer_AudioRecordRead},
{"AudioRecordStop", "(I)V", (void*)Java_android_speech_srec_Recognizer_AudioRecordStop},
{"AudioRecordDelete", "(I)V", (void*)Java_android_speech_srec_Recognizer_AudioRecordDelete},
};
/*
* Set some test stuff up.
*
* Returns the JNI version on success, -1 on failure.
*/
jint register_android_speech_srec_MicrophoneInputStream(JavaVM* vm, void* reserved)
{
JNIEnv* env = NULL;
jclass clazz = NULL;
const char* className = "android/speech/srec/MicrophoneInputStream";
if (vm->GetEnv((void**) &env, JNI_VERSION_1_4) != JNI_OK) {
ALOGE("ERROR: GetEnv failed\n");
return -1;
}
assert(env != NULL);
clazz = env->FindClass(className);
if (clazz == NULL) {
ALOGE("Native registration unable to find class '%s'\n", className);
return -1;
}
if (env->RegisterNatives(clazz, gMethods,
sizeof(gMethods) / sizeof(gMethods[0])) < 0) {
ALOGE("RegisterNatives failed for '%s'\n", className);
return -1;
}
/* success -- return valid version number */
return JNI_VERSION_1_4;;
}
|
