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Fix for bug 2001, verify that the AudioTrack is properly initialized

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...and fail to initialize the audio backend if it's not!
This commit is contained in:
Gabriel Jacobo 2013-07-31 10:04:59 -03:00
parent 2f7e78480d
commit 512f5dfc21
2 changed files with 18 additions and 3 deletions
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13
android-project/src/org/libsdl/app/SDLActivity.java
View file

@ -452,7 +452,7 @@ public class SDLActivity extends Activity {
}
// Audio
public static void audioInit(int sampleRate, boolean is16Bit, boolean isStereo, int desiredFrames) {
public static int audioInit(int sampleRate, boolean is16Bit, boolean isStereo, int desiredFrames) {
int channelConfig = isStereo ? AudioFormat.CHANNEL_CONFIGURATION_STEREO : AudioFormat.CHANNEL_CONFIGURATION_MONO;
int audioFormat = is16Bit ? AudioFormat.ENCODING_PCM_16BIT : AudioFormat.ENCODING_PCM_8BIT;
int frameSize = (isStereo ? 2 : 1) * (is16Bit ? 2 : 1);
@ -467,9 +467,20 @@ public class SDLActivity extends Activity {
mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRate,
channelConfig, audioFormat, desiredFrames * frameSize, AudioTrack.MODE_STREAM);
// Instantiating AudioTrack can "succeed" without an exception and the track may still be invalid
// Ref: https://android.googlesource.com/platform/frameworks/base/+/refs/heads/master/media/java/android/media/AudioTrack.java
// Ref: http://developer.android.com/reference/android/media/AudioTrack.html#getState()
if (mAudioTrack.getState() != AudioTrack.STATE_INITIALIZED) {
Log.e("SDL", "Failed during initialization of Audio Track");
return -1;
}
audioStartThread();
Log.v("SDL", "SDL audio: got " + ((mAudioTrack.getChannelCount() >= 2) ? "stereo" : "mono") + " " + ((mAudioTrack.getAudioFormat() == AudioFormat.ENCODING_PCM_16BIT) ? "16-bit" : "8-bit") + " " + (mAudioTrack.getSampleRate() / 1000f) + "kHz, " + desiredFrames + " frames buffer");
return 0;
}
public static void audioStartThread() {

8
src/core/android/SDL_android.c
View file

@ -123,7 +123,7 @@ void SDL_Android_Init(JNIEnv* mEnv, jclass cls)
midFlipBuffers = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
"flipBuffers","()V");
midAudioInit = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
"audioInit", "(IZZI)V");
"audioInit", "(IZZI)I");
midAudioWriteShortBuffer = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
"audioWriteShortBuffer", "([S)V");
midAudioWriteByteBuffer = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
@ -456,7 +456,11 @@ int Android_JNI_OpenAudioDevice(int sampleRate, int is16Bit, int channelCount, i
audioBuffer16Bit = is16Bit;
audioBufferStereo = channelCount > 1;
(*env)->CallStaticVoidMethod(env, mActivityClass, midAudioInit, sampleRate, audioBuffer16Bit, audioBufferStereo, desiredBufferFrames);
if ((*env)->CallStaticIntMethod(env, mActivityClass, midAudioInit, sampleRate, audioBuffer16Bit, audioBufferStereo, desiredBufferFrames) != 0) {
/* Error during audio initialization */
__android_log_print(ANDROID_LOG_WARN, "SDL", "SDL audio: error on AudioTrack initialization!");
return 0;
}
/* Allocating the audio buffer from the Java side and passing it as the return value for audioInit no longer works on
* Android >= 4.2 due to a "stale global reference" error. So now we allocate this buffer directly from this side. */