1/*
2**
3** Copyright 2006, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#define LOG_TAG "AudioSystem"
19#include <utils/Log.h>
20
21#include <stdio.h>
22#include <unistd.h>
23#include <fcntl.h>
24#include <math.h>
25
26#include <jni.h>
27#include <JNIHelp.h>
28#include <android_runtime/AndroidRuntime.h>
29
30#include <media/AudioSystem.h>
31
32#include <system/audio.h>
33#include <system/audio_policy.h>
34
35// ----------------------------------------------------------------------------
36
37using namespace android;
38
39static const char* const kClassPathName = "android/media/AudioSystem";
40
41enum AudioError {
42    kAudioStatusOk = 0,
43    kAudioStatusError = 1,
44    kAudioStatusMediaServerDied = 100
45};
46
47static int check_AudioSystem_Command(status_t status)
48{
49    if (status == NO_ERROR) {
50        return kAudioStatusOk;
51    } else {
52        return kAudioStatusError;
53    }
54}
55
56static int
57android_media_AudioSystem_muteMicrophone(JNIEnv *env, jobject thiz, jboolean on)
58{
59    return check_AudioSystem_Command(AudioSystem::muteMicrophone(on));
60}
61
62static jboolean
63android_media_AudioSystem_isMicrophoneMuted(JNIEnv *env, jobject thiz)
64{
65    bool state = false;
66    AudioSystem::isMicrophoneMuted(&state);
67    return state;
68}
69
70static jboolean
71android_media_AudioSystem_isStreamActive(JNIEnv *env, jobject thiz, jint stream, jint inPastMs)
72{
73    bool state = false;
74    AudioSystem::isStreamActive((audio_stream_type_t) stream, &state, inPastMs);
75    return state;
76}
77
78static jboolean
79android_media_AudioSystem_isSourceActive(JNIEnv *env, jobject thiz, jint source)
80{
81    bool state = false;
82    AudioSystem::isSourceActive((audio_source_t) source, &state);
83    return state;
84}
85
86static int
87android_media_AudioSystem_setParameters(JNIEnv *env, jobject thiz, jstring keyValuePairs)
88{
89    const jchar* c_keyValuePairs = env->GetStringCritical(keyValuePairs, 0);
90    String8 c_keyValuePairs8;
91    if (keyValuePairs) {
92        c_keyValuePairs8 = String8(c_keyValuePairs, env->GetStringLength(keyValuePairs));
93        env->ReleaseStringCritical(keyValuePairs, c_keyValuePairs);
94    }
95    int status = check_AudioSystem_Command(AudioSystem::setParameters(0, c_keyValuePairs8));
96    return status;
97}
98
99static jstring
100android_media_AudioSystem_getParameters(JNIEnv *env, jobject thiz, jstring keys)
101{
102    const jchar* c_keys = env->GetStringCritical(keys, 0);
103    String8 c_keys8;
104    if (keys) {
105        c_keys8 = String8(c_keys, env->GetStringLength(keys));
106        env->ReleaseStringCritical(keys, c_keys);
107    }
108    return env->NewStringUTF(AudioSystem::getParameters(0, c_keys8).string());
109}
110
111static void
112android_media_AudioSystem_error_callback(status_t err)
113{
114    JNIEnv *env = AndroidRuntime::getJNIEnv();
115    if (env == NULL) {
116        return;
117    }
118
119    jclass clazz = env->FindClass(kClassPathName);
120
121    int error;
122
123    switch (err) {
124    case DEAD_OBJECT:
125        error = kAudioStatusMediaServerDied;
126        break;
127    case NO_ERROR:
128        error = kAudioStatusOk;
129        break;
130    default:
131        error = kAudioStatusError;
132        break;
133    }
134
135    env->CallStaticVoidMethod(clazz, env->GetStaticMethodID(clazz, "errorCallbackFromNative","(I)V"), error);
136}
137
138static int
139android_media_AudioSystem_setDeviceConnectionState(JNIEnv *env, jobject thiz, jint device, jint state, jstring device_address)
140{
141    const char *c_address = env->GetStringUTFChars(device_address, NULL);
142    int status = check_AudioSystem_Command(AudioSystem::setDeviceConnectionState(static_cast <audio_devices_t>(device),
143                                          static_cast <audio_policy_dev_state_t>(state),
144                                          c_address));
145    env->ReleaseStringUTFChars(device_address, c_address);
146    return status;
147}
148
149static int
150android_media_AudioSystem_getDeviceConnectionState(JNIEnv *env, jobject thiz, jint device, jstring device_address)
151{
152    const char *c_address = env->GetStringUTFChars(device_address, NULL);
153    int state = static_cast <int>(AudioSystem::getDeviceConnectionState(static_cast <audio_devices_t>(device),
154                                          c_address));
155    env->ReleaseStringUTFChars(device_address, c_address);
156    return state;
157}
158
159static int
160android_media_AudioSystem_setPhoneState(JNIEnv *env, jobject thiz, jint state)
161{
162    return check_AudioSystem_Command(AudioSystem::setPhoneState((audio_mode_t) state));
163}
164
165static int
166android_media_AudioSystem_setForceUse(JNIEnv *env, jobject thiz, jint usage, jint config)
167{
168    return check_AudioSystem_Command(AudioSystem::setForceUse(static_cast <audio_policy_force_use_t>(usage),
169                                                           static_cast <audio_policy_forced_cfg_t>(config)));
170}
171
172static int
173android_media_AudioSystem_getForceUse(JNIEnv *env, jobject thiz, jint usage)
174{
175    return static_cast <int>(AudioSystem::getForceUse(static_cast <audio_policy_force_use_t>(usage)));
176}
177
178static int
179android_media_AudioSystem_initStreamVolume(JNIEnv *env, jobject thiz, jint stream, jint indexMin, jint indexMax)
180{
181    return check_AudioSystem_Command(AudioSystem::initStreamVolume(static_cast <audio_stream_type_t>(stream),
182                                                                   indexMin,
183                                                                   indexMax));
184}
185
186static int
187android_media_AudioSystem_setStreamVolumeIndex(JNIEnv *env,
188                                               jobject thiz,
189                                               jint stream,
190                                               jint index,
191                                               jint device)
192{
193    return check_AudioSystem_Command(
194            AudioSystem::setStreamVolumeIndex(static_cast <audio_stream_type_t>(stream),
195                                              index,
196                                              (audio_devices_t)device));
197}
198
199static int
200android_media_AudioSystem_getStreamVolumeIndex(JNIEnv *env,
201                                               jobject thiz,
202                                               jint stream,
203                                               jint device)
204{
205    int index;
206    if (AudioSystem::getStreamVolumeIndex(static_cast <audio_stream_type_t>(stream),
207                                          &index,
208                                          (audio_devices_t)device)
209            != NO_ERROR) {
210        index = -1;
211    }
212    return index;
213}
214
215static int
216android_media_AudioSystem_setMasterVolume(JNIEnv *env, jobject thiz, jfloat value)
217{
218    return check_AudioSystem_Command(AudioSystem::setMasterVolume(value));
219}
220
221static jfloat
222android_media_AudioSystem_getMasterVolume(JNIEnv *env, jobject thiz)
223{
224    float value;
225    if (AudioSystem::getMasterVolume(&value) != NO_ERROR) {
226        value = -1.0;
227    }
228    return value;
229}
230
231static int
232android_media_AudioSystem_setMasterMute(JNIEnv *env, jobject thiz, jboolean mute)
233{
234    return check_AudioSystem_Command(AudioSystem::setMasterMute(mute));
235}
236
237static jfloat
238android_media_AudioSystem_getMasterMute(JNIEnv *env, jobject thiz)
239{
240    bool mute;
241    if (AudioSystem::getMasterMute(&mute) != NO_ERROR) {
242        mute = false;
243    }
244    return mute;
245}
246
247static jint
248android_media_AudioSystem_getDevicesForStream(JNIEnv *env, jobject thiz, jint stream)
249{
250    return (jint) AudioSystem::getDevicesForStream(static_cast <audio_stream_type_t>(stream));
251}
252
253static jint
254android_media_AudioSystem_getPrimaryOutputSamplingRate(JNIEnv *env, jobject clazz)
255{
256    return (jint) AudioSystem::getPrimaryOutputSamplingRate();
257}
258
259static jint
260android_media_AudioSystem_getPrimaryOutputFrameCount(JNIEnv *env, jobject clazz)
261{
262    return (jint) AudioSystem::getPrimaryOutputFrameCount();
263}
264
265// ----------------------------------------------------------------------------
266
267static JNINativeMethod gMethods[] = {
268    {"setParameters",        "(Ljava/lang/String;)I", (void *)android_media_AudioSystem_setParameters},
269    {"getParameters",        "(Ljava/lang/String;)Ljava/lang/String;", (void *)android_media_AudioSystem_getParameters},
270    {"muteMicrophone",      "(Z)I",     (void *)android_media_AudioSystem_muteMicrophone},
271    {"isMicrophoneMuted",   "()Z",      (void *)android_media_AudioSystem_isMicrophoneMuted},
272    {"isStreamActive",      "(II)Z",    (void *)android_media_AudioSystem_isStreamActive},
273    {"isSourceActive",      "(I)Z",     (void *)android_media_AudioSystem_isSourceActive},
274    {"setDeviceConnectionState", "(IILjava/lang/String;)I", (void *)android_media_AudioSystem_setDeviceConnectionState},
275    {"getDeviceConnectionState", "(ILjava/lang/String;)I",  (void *)android_media_AudioSystem_getDeviceConnectionState},
276    {"setPhoneState",       "(I)I",     (void *)android_media_AudioSystem_setPhoneState},
277    {"setForceUse",         "(II)I",    (void *)android_media_AudioSystem_setForceUse},
278    {"getForceUse",         "(I)I",     (void *)android_media_AudioSystem_getForceUse},
279    {"initStreamVolume",    "(III)I",   (void *)android_media_AudioSystem_initStreamVolume},
280    {"setStreamVolumeIndex","(III)I",   (void *)android_media_AudioSystem_setStreamVolumeIndex},
281    {"getStreamVolumeIndex","(II)I",    (void *)android_media_AudioSystem_getStreamVolumeIndex},
282    {"setMasterVolume",     "(F)I",     (void *)android_media_AudioSystem_setMasterVolume},
283    {"getMasterVolume",     "()F",      (void *)android_media_AudioSystem_getMasterVolume},
284    {"setMasterMute",       "(Z)I",     (void *)android_media_AudioSystem_setMasterMute},
285    {"getMasterMute",       "()Z",      (void *)android_media_AudioSystem_getMasterMute},
286    {"getDevicesForStream", "(I)I",     (void *)android_media_AudioSystem_getDevicesForStream},
287    {"getPrimaryOutputSamplingRate", "()I", (void *)android_media_AudioSystem_getPrimaryOutputSamplingRate},
288    {"getPrimaryOutputFrameCount",   "()I", (void *)android_media_AudioSystem_getPrimaryOutputFrameCount},
289};
290
291int register_android_media_AudioSystem(JNIEnv *env)
292{
293    AudioSystem::setErrorCallback(android_media_AudioSystem_error_callback);
294
295    return AndroidRuntime::registerNativeMethods(env,
296                kClassPathName, gMethods, NELEM(gMethods));
297}
298