Android上的OpenSL音频在我锁定屏幕时停止5.0.1正常6.0.1不正常
我制作了一个android应用程序,可以从本地wifi网络传输语音。为了监听和流媒体,我使用JNI中的Opus C API进行解码,并使用OpenSL音频进行读取 我从服务中调用JNI,就像这样Android上的OpenSL音频在我锁定屏幕时停止5.0.1正常6.0.1不正常,android,audio,android-service,opensl,opus,Android,Audio,Android Service,Opensl,Opus,我制作了一个android应用程序,可以从本地wifi网络传输语音。为了监听和流媒体,我使用JNI中的Opus C API进行解码,并使用OpenSL音频进行读取 我从服务中调用JNI,就像这样 public class StreamService extends Service { private NativeReceiver mNativeReceiver; ... @Override public int onStartCommand(Intent i
public class StreamService extends Service {
private NativeReceiver mNativeReceiver;
...
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// Gérer la requête
mNativeReceiver = new NativeReceiver();
mCanPlay = mNativeReceiver.init();
mNativeReceiver.startNativeReceiver();
...
return Service.START_NOT_STICKY;
}
它工作得非常好,当我点击我的按钮时,这个服务被调用,我从我的android智能手机中听到声音
但是,当我锁定我的智能手机屏幕时,声音就像“静音”,当我解锁声音播放时。仅在6.0.X上,不在5.0.X上
所以我的第一个想法是网络数据包停止了,我进行了调试,我的智能手机继续接收网络数据包
我的服务正在运行,只是声音被静音了
对于JNI OpenSL,我使用以下代码片段:
要调用我的JNI:
public void startNativeReceiver() {
new Thread(new Runnable() {
@Override
public void run() {
// set priority
android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
start();
}
}).start();
}
这就叫:
const int queue_elements_num = 20;
const int start_after = 4;
SpscCircularQueue *queue = NULL;
OpusDecoder *opus_dec = NULL;
uint32_t samplerate = 24000;
float frame_length = 20;
bool player_initialized = false;
bool player_started = false;
int frames_in_queue = 0;
while (!rcv_th_terminate) {
ssize_t rcv_len = read(udp_sock, rcv_buf, sizeof(rcv_buf));
if (rcv_len <= 0) {
__android_log_print(ANDROID_LOG_WARN, "SMPlayer",
"Failed to receive UDP data");
continue;
}
__android_log_print(ANDROID_LOG_INFO, "SMPlayer",
"reading");
if (!player_initialized) {
if (rcv_buf[0] != 0x01) {
__android_log_print(ANDROID_LOG_ERROR, "SMPlayer",
"Unsupported version of SMPlayer "
"streaming protocol");
return NULL;
}
/* initialize decoder */
int opus_err = 0;
opus_dec = opus_decoder_create(samplerate, 1, &opus_err);
if (!opus_dec) {
__android_log_print(ANDROID_LOG_ERROR, "SMPlayer",
"unable to initialize OPUS decoder, "
"error code - %d", opus_err);
return NULL;
}
/* initialize circular queue */
uint32_t frame_buf_size = samplerate / 1000 * frame_length * 2;
queue = spsc_circular_queue_alloc(queue_elements_num, frame_buf_size);
if (!queue) {
__android_log_print(ANDROID_LOG_ERROR, "SMPlayer",
"unable to allocate SPSC Circular Queue");
opus_decoder_destroy(opus_dec);
return NULL;
}
/* initialize the play and start the playback */
osl_player_init(queue, samplerate);
player_initialized = true;
} else {
int dec_samples = opus_decode(opus_dec, rcv_buf + 2, rcv_len - 2,
(int16_t *)dec_buf, sizeof(dec_buf), 0);
if (dec_samples <= 0) {
__android_log_print(ANDROID_LOG_ERROR, "SMPlayer",
"failed to decode the data");
osl_player_terminate();
spsc_circular_queue_free(queue);
opus_decoder_destroy(opus_dec);
exit(EXIT_FAILURE);
}
while (!spsc_circular_queue_push(queue, dec_buf) && !rcv_th_terminate)
usleep((useconds_t)(frame_length * 1000.0));
if (!player_started) {
frames_in_queue++;
if (frames_in_queue == start_after) {
osl_player_jumpstart(queue);
player_started = true;
}
}
}
}
osl_player_terminate();
if (empty_buf_cnt)
__android_log_print(ANDROID_LOG_DEBUG, "SMPlayer",
"Empty buffers played: %" PRIu64, empty_buf_cnt);
spsc_circular_queue_free(queue);
opus_decoder_destroy(opus_dec);
}
const int queue\u elements\u num=20;
const int start_after=4;
SpscCircularQueue*队列=NULL;
OpusDecoder*opus_dec=NULL;
uint32_t采样器=24000;
浮动框架长度=20;
bool player_initialized=false;
bool player_start=false;
队列中的整数帧=0;
而(!rcv_th_终止){
ssize_t rcv_len=read(udp_sock,rcv_buf,sizeof(rcv_buf));
如果(rcv_len我认为您的权限在6.0及更高版本的android中过期,因此如果您的权限处于危险权限,请检查您的权限,然后动态授予它。我不理解您处理的权限?在我的清单中?查看此项检查您的权限并添加所需的权限。录制音频是一种危险的permission…你需要在运行时添加它来修复Marshmallow我添加它来尝试,但我不认为我需要此权限,因为我不录制,但只通过wifi网络收听,但我会快速尝试;)我设置了权限,我录制了音频,但没有区别!
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<application
android:allowBackup="true"