android: implement audio capture support.

This commit is contained in:
Ryan C. Gordon 2016-08-11 22:04:49 -04:00
parent b78ec97496
commit 8f0af77354
5 changed files with 250 additions and 49 deletions

View File

@ -17,6 +17,9 @@
<!-- Allow writing to external storage --> <!-- Allow writing to external storage -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!-- if you want to capture audio, uncomment this. -->
<!-- <uses-permission android:name="android.permission.RECORD_AUDIO" /> -->
<!-- Create a Java class extending SDLActivity and place it in a <!-- Create a Java class extending SDLActivity and place it in a
directory under src matching the package, e.g. directory under src matching the package, e.g.
src/com/gamemaker/game/MyGame.java src/com/gamemaker/game/MyGame.java

View File

@ -59,6 +59,7 @@ public class SDLActivity extends Activity {
// Audio // Audio
protected static AudioTrack mAudioTrack; protected static AudioTrack mAudioTrack;
protected static AudioRecord mAudioRecord;
/** /**
* This method is called by SDL before loading the native shared libraries. * This method is called by SDL before loading the native shared libraries.
@ -106,6 +107,7 @@ public class SDLActivity extends Activity {
mJoystickHandler = null; mJoystickHandler = null;
mSDLThread = null; mSDLThread = null;
mAudioTrack = null; mAudioTrack = null;
mAudioRecord = null;
mExitCalledFromJava = false; mExitCalledFromJava = false;
mBrokenLibraries = false; mBrokenLibraries = false;
mIsPaused = false; mIsPaused = false;
@ -544,7 +546,7 @@ public class SDLActivity extends Activity {
/** /**
* This method is called by SDL using JNI. * This method is called by SDL using JNI.
*/ */
public static int audioInit(int sampleRate, boolean is16Bit, boolean isStereo, int desiredFrames) { public static int audioOpen(int sampleRate, boolean is16Bit, boolean isStereo, int desiredFrames) {
int channelConfig = isStereo ? AudioFormat.CHANNEL_CONFIGURATION_STEREO : AudioFormat.CHANNEL_CONFIGURATION_MONO; int channelConfig = isStereo ? AudioFormat.CHANNEL_CONFIGURATION_STEREO : AudioFormat.CHANNEL_CONFIGURATION_MONO;
int audioFormat = is16Bit ? AudioFormat.ENCODING_PCM_16BIT : AudioFormat.ENCODING_PCM_8BIT; int audioFormat = is16Bit ? AudioFormat.ENCODING_PCM_16BIT : AudioFormat.ENCODING_PCM_8BIT;
int frameSize = (isStereo ? 2 : 1) * (is16Bit ? 2 : 1); int frameSize = (isStereo ? 2 : 1) * (is16Bit ? 2 : 1);
@ -623,13 +625,72 @@ public class SDLActivity extends Activity {
/** /**
* This method is called by SDL using JNI. * This method is called by SDL using JNI.
*/ */
public static void audioQuit() { public static int captureOpen(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);
Log.v(TAG, "SDL capture: wanted " + (isStereo ? "stereo" : "mono") + " " + (is16Bit ? "16-bit" : "8-bit") + " " + (sampleRate / 1000f) + "kHz, " + desiredFrames + " frames buffer");
// Let the user pick a larger buffer if they really want -- but ye
// gods they probably shouldn't, the minimums are horrifyingly high
// latency already
desiredFrames = Math.max(desiredFrames, (AudioRecord.getMinBufferSize(sampleRate, channelConfig, audioFormat) + frameSize - 1) / frameSize);
if (mAudioRecord == null) {
mAudioRecord = new AudioRecord(MediaRecorder.AudioSource.DEFAULT, sampleRate,
channelConfig, audioFormat, desiredFrames * frameSize);
// see notes about AudioTrack state in audioOpen(), above. Probably also applies here.
if (mAudioRecord.getState() != AudioRecord.STATE_INITIALIZED) {
Log.e(TAG, "Failed during initialization of AudioRecord");
mAudioRecord.release();
mAudioRecord = null;
return -1;
}
mAudioRecord.startRecording();
}
Log.v(TAG, "SDL capture: got " + ((mAudioRecord.getChannelCount() >= 2) ? "stereo" : "mono") + " " + ((mAudioRecord.getAudioFormat() == AudioFormat.ENCODING_PCM_16BIT) ? "16-bit" : "8-bit") + " " + (mAudioRecord.getSampleRate() / 1000f) + "kHz, " + desiredFrames + " frames buffer");
return 0;
}
/** This method is called by SDL using JNI. */
public static int captureReadShortBuffer(short[] buffer, boolean blocking) {
// !!! FIXME: this is available in API Level 23. Until then, we always block. :(
//return mAudioRecord.read(buffer, 0, buffer.length, blocking ? AudioRecord.READ_BLOCKING : AudioRecord.READ_NON_BLOCKING);
return mAudioRecord.read(buffer, 0, buffer.length);
}
/** This method is called by SDL using JNI. */
public static int captureReadByteBuffer(byte[] buffer, boolean blocking) {
// !!! FIXME: this is available in API Level 23. Until then, we always block. :(
//return mAudioRecord.read(buffer, 0, buffer.length, blocking ? AudioRecord.READ_BLOCKING : AudioRecord.READ_NON_BLOCKING);
return mAudioRecord.read(buffer, 0, buffer.length);
}
/** This method is called by SDL using JNI. */
public static void audioClose() {
if (mAudioTrack != null) { if (mAudioTrack != null) {
mAudioTrack.stop(); mAudioTrack.stop();
mAudioTrack.release();
mAudioTrack = null; mAudioTrack = null;
} }
} }
/** This method is called by SDL using JNI. */
public static void captureClose() {
if (mAudioRecord != null) {
mAudioRecord.stop();
mAudioRecord.release();
mAudioRecord = null;
}
}
// Input // Input
/** /**

View File

@ -24,6 +24,7 @@
/* Output audio to Android */ /* Output audio to Android */
#include "SDL_assert.h"
#include "SDL_audio.h" #include "SDL_audio.h"
#include "../SDL_audio_c.h" #include "../SDL_audio_c.h"
#include "SDL_androidaudio.h" #include "SDL_androidaudio.h"
@ -33,24 +34,22 @@
#include <android/log.h> #include <android/log.h>
static SDL_AudioDevice* audioDevice = NULL; static SDL_AudioDevice* audioDevice = NULL;
static SDL_AudioDevice* captureDevice = NULL;
static int static int
AndroidAUD_OpenDevice(_THIS, void *handle, const char *devname, int iscapture) AndroidAUD_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
{ {
SDL_AudioFormat test_format; SDL_AudioFormat test_format;
SDL_assert((captureDevice == NULL) || !iscapture);
SDL_assert((audioDevice == NULL) || iscapture);
if (iscapture) { if (iscapture) {
/* TODO: implement capture */ captureDevice = this;
return SDL_SetError("Capture not supported on Android"); } else {
audioDevice = this;
} }
/* !!! FIXME: higher level will prevent this now. Lose this check (and global?). */
if (audioDevice != NULL) {
return SDL_SetError("Only one audio device at a time please!");
}
audioDevice = this;
this->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, (sizeof *this->hidden)); this->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, (sizeof *this->hidden));
if (this->hidden == NULL) { if (this->hidden == NULL) {
return SDL_OutOfMemory(); return SDL_OutOfMemory();
@ -83,15 +82,16 @@ AndroidAUD_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
this->spec.freq = 48000; this->spec.freq = 48000;
} }
/* TODO: pass in/return a (Java) device ID, also whether we're opening for input or output */ /* TODO: pass in/return a (Java) device ID */
this->spec.samples = Android_JNI_OpenAudioDevice(this->spec.freq, this->spec.format == AUDIO_U8 ? 0 : 1, this->spec.channels, this->spec.samples); this->spec.samples = Android_JNI_OpenAudioDevice(iscapture, this->spec.freq, this->spec.format == AUDIO_U8 ? 0 : 1, this->spec.channels, this->spec.samples);
SDL_CalculateAudioSpec(&this->spec);
if (this->spec.samples == 0) { if (this->spec.samples == 0) {
/* Init failed? */ /* Init failed? */
return SDL_SetError("Java-side initialization failed!"); return SDL_SetError("Java-side initialization failed!");
} }
SDL_CalculateAudioSpec(&this->spec);
return 0; return 0;
} }
@ -107,18 +107,33 @@ AndroidAUD_GetDeviceBuf(_THIS)
return Android_JNI_GetAudioBuffer(); return Android_JNI_GetAudioBuffer();
} }
static int
AndroidAUD_CaptureFromDevice(_THIS, void *buffer, int buflen)
{
return Android_JNI_CaptureAudioBuffer(buffer, buflen);
}
static void
AndroidAUD_FlushCapture(_THIS)
{
Android_JNI_FlushCapturedAudio();
}
static void static void
AndroidAUD_CloseDevice(_THIS) AndroidAUD_CloseDevice(_THIS)
{ {
/* At this point SDL_CloseAudioDevice via close_audio_device took care of terminating the audio thread /* At this point SDL_CloseAudioDevice via close_audio_device took care of terminating the audio thread
so it's safe to terminate the Java side buffer and AudioTrack so it's safe to terminate the Java side buffer and AudioTrack
*/ */
Android_JNI_CloseAudioDevice(); Android_JNI_CloseAudioDevice(this->iscapture);
if (this->iscapture) {
if (audioDevice == this) { SDL_assert(captureDevice == this);
SDL_free(this->hidden); captureDevice = NULL;
} else {
SDL_assert(audioDevice == this);
audioDevice = NULL; audioDevice = NULL;
} }
SDL_free(this->hidden);
} }
static int static int
@ -129,9 +144,11 @@ AndroidAUD_Init(SDL_AudioDriverImpl * impl)
impl->PlayDevice = AndroidAUD_PlayDevice; impl->PlayDevice = AndroidAUD_PlayDevice;
impl->GetDeviceBuf = AndroidAUD_GetDeviceBuf; impl->GetDeviceBuf = AndroidAUD_GetDeviceBuf;
impl->CloseDevice = AndroidAUD_CloseDevice; impl->CloseDevice = AndroidAUD_CloseDevice;
impl->CaptureFromDevice = AndroidAUD_CaptureFromDevice;
impl->FlushCapture = AndroidAUD_FlushCapture;
/* and the capabilities */ /* and the capabilities */
impl->HasCaptureSupport = 0; /* TODO */ impl->HasCaptureSupport = SDL_TRUE;
impl->OnlyHasDefaultOutputDevice = 1; impl->OnlyHasDefaultOutputDevice = 1;
impl->OnlyHasDefaultCaptureDevice = 1; impl->OnlyHasDefaultCaptureDevice = 1;
@ -159,6 +176,19 @@ void AndroidAUD_PauseDevices(void)
private->resume = SDL_TRUE; private->resume = SDL_TRUE;
} }
} }
if(captureDevice != NULL && captureDevice->hidden != NULL) {
private = (struct SDL_PrivateAudioData *) captureDevice->hidden;
if (SDL_AtomicGet(&captureDevice->paused)) {
/* The device is already paused, leave it alone */
private->resume = SDL_FALSE;
}
else {
SDL_LockMutex(captureDevice->mixer_lock);
SDL_AtomicSet(&captureDevice->paused, 1);
private->resume = SDL_TRUE;
}
}
} }
/* Resume (unblock) all non already paused audio devices by releasing their mixer lock */ /* Resume (unblock) all non already paused audio devices by releasing their mixer lock */
@ -174,6 +204,15 @@ void AndroidAUD_ResumeDevices(void)
SDL_UnlockMutex(audioDevice->mixer_lock); SDL_UnlockMutex(audioDevice->mixer_lock);
} }
} }
if(captureDevice != NULL && captureDevice->hidden != NULL) {
private = (struct SDL_PrivateAudioData *) captureDevice->hidden;
if (private->resume) {
SDL_AtomicSet(&captureDevice->paused, 0);
private->resume = SDL_FALSE;
SDL_UnlockMutex(captureDevice->mixer_lock);
}
}
} }

View File

@ -71,10 +71,14 @@ static jclass mActivityClass;
/* method signatures */ /* method signatures */
static jmethodID midGetNativeSurface; static jmethodID midGetNativeSurface;
static jmethodID midAudioInit; static jmethodID midAudioOpen;
static jmethodID midAudioWriteShortBuffer; static jmethodID midAudioWriteShortBuffer;
static jmethodID midAudioWriteByteBuffer; static jmethodID midAudioWriteByteBuffer;
static jmethodID midAudioQuit; static jmethodID midAudioClose;
static jmethodID midCaptureOpen;
static jmethodID midCaptureReadShortBuffer;
static jmethodID midCaptureReadByteBuffer;
static jmethodID midCaptureClose;
static jmethodID midPollInputDevices; static jmethodID midPollInputDevices;
/* Accelerometer data storage */ /* Accelerometer data storage */
@ -118,21 +122,31 @@ JNIEXPORT void JNICALL SDL_Android_Init(JNIEnv* mEnv, jclass cls)
midGetNativeSurface = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass, midGetNativeSurface = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
"getNativeSurface","()Landroid/view/Surface;"); "getNativeSurface","()Landroid/view/Surface;");
midAudioInit = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass, midAudioOpen = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
"audioInit", "(IZZI)I"); "audioOpen", "(IZZI)I");
midAudioWriteShortBuffer = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass, midAudioWriteShortBuffer = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
"audioWriteShortBuffer", "([S)V"); "audioWriteShortBuffer", "([S)V");
midAudioWriteByteBuffer = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass, midAudioWriteByteBuffer = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
"audioWriteByteBuffer", "([B)V"); "audioWriteByteBuffer", "([B)V");
midAudioQuit = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass, midAudioClose = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
"audioQuit", "()V"); "audioClose", "()V");
midCaptureOpen = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
"captureOpen", "(IZZI)I");
midCaptureReadShortBuffer = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
"captureReadShortBuffer", "([SZ)I");
midCaptureReadByteBuffer = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
"captureReadByteBuffer", "([BZ)I");
midCaptureClose = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
"captureClose", "()V");
midPollInputDevices = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass, midPollInputDevices = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
"pollInputDevices", "()V"); "pollInputDevices", "()V");
bHasNewData = SDL_FALSE; bHasNewData = SDL_FALSE;
if (!midGetNativeSurface || !midAudioInit || if (!midGetNativeSurface ||
!midAudioWriteShortBuffer || !midAudioWriteByteBuffer || !midAudioQuit || !midPollInputDevices) { !midAudioOpen || !midAudioWriteShortBuffer || !midAudioWriteByteBuffer || !midAudioClose || !
!midCaptureOpen || !midCaptureReadShortBuffer || !midCaptureReadByteBuffer || !midCaptureClose ||
!midPollInputDevices) {
__android_log_print(ANDROID_LOG_WARN, "SDL", "SDL: Couldn't locate Java callbacks, check that they're named and typed correctly"); __android_log_print(ANDROID_LOG_WARN, "SDL", "SDL: Couldn't locate Java callbacks, check that they're named and typed correctly");
} }
__android_log_print(ANDROID_LOG_INFO, "SDL", "SDL_Android_Init() finished!"); __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL_Android_Init() finished!");
@ -556,11 +570,14 @@ int Android_JNI_SetupThread(void)
static jboolean audioBuffer16Bit = JNI_FALSE; static jboolean audioBuffer16Bit = JNI_FALSE;
static jobject audioBuffer = NULL; static jobject audioBuffer = NULL;
static void* audioBufferPinned = NULL; static void* audioBufferPinned = NULL;
static jboolean captureBuffer16Bit = JNI_FALSE;
static jobject captureBuffer = NULL;
int Android_JNI_OpenAudioDevice(int sampleRate, int is16Bit, int channelCount, int desiredBufferFrames) int Android_JNI_OpenAudioDevice(int iscapture, int sampleRate, int is16Bit, int channelCount, int desiredBufferFrames)
{ {
jboolean audioBufferStereo; jboolean audioBufferStereo;
int audioBufferFrames; int audioBufferFrames;
jobject jbufobj = NULL;
jboolean isCopy; jboolean isCopy;
JNIEnv *env = Android_JNI_GetEnv(); JNIEnv *env = Android_JNI_GetEnv();
@ -570,14 +587,24 @@ int Android_JNI_OpenAudioDevice(int sampleRate, int is16Bit, int channelCount, i
} }
Android_JNI_SetupThread(); Android_JNI_SetupThread();
__android_log_print(ANDROID_LOG_VERBOSE, "SDL", "SDL audio: opening device");
audioBuffer16Bit = is16Bit;
audioBufferStereo = channelCount > 1; audioBufferStereo = channelCount > 1;
if ((*env)->CallStaticIntMethod(env, mActivityClass, midAudioInit, sampleRate, audioBuffer16Bit, audioBufferStereo, desiredBufferFrames) != 0) { if (iscapture) {
/* Error during audio initialization */ __android_log_print(ANDROID_LOG_VERBOSE, "SDL", "SDL audio: opening device for capture");
__android_log_print(ANDROID_LOG_WARN, "SDL", "SDL audio: error on AudioTrack initialization!"); captureBuffer16Bit = is16Bit;
return 0; if ((*env)->CallStaticIntMethod(env, mActivityClass, midCaptureOpen, sampleRate, audioBuffer16Bit, audioBufferStereo, desiredBufferFrames) != 0) {
/* Error during audio initialization */
__android_log_print(ANDROID_LOG_WARN, "SDL", "SDL audio: error on AudioRecord initialization!");
return 0;
}
} else {
__android_log_print(ANDROID_LOG_VERBOSE, "SDL", "SDL audio: opening device for output");
audioBuffer16Bit = is16Bit;
if ((*env)->CallStaticIntMethod(env, mActivityClass, midAudioOpen, 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 /* Allocating the audio buffer from the Java side and passing it as the return value for audioInit no longer works on
@ -586,31 +613,43 @@ int Android_JNI_OpenAudioDevice(int sampleRate, int is16Bit, int channelCount, i
if (is16Bit) { if (is16Bit) {
jshortArray audioBufferLocal = (*env)->NewShortArray(env, desiredBufferFrames * (audioBufferStereo ? 2 : 1)); jshortArray audioBufferLocal = (*env)->NewShortArray(env, desiredBufferFrames * (audioBufferStereo ? 2 : 1));
if (audioBufferLocal) { if (audioBufferLocal) {
audioBuffer = (*env)->NewGlobalRef(env, audioBufferLocal); jbufobj = (*env)->NewGlobalRef(env, audioBufferLocal);
(*env)->DeleteLocalRef(env, audioBufferLocal); (*env)->DeleteLocalRef(env, audioBufferLocal);
} }
} }
else { else {
jbyteArray audioBufferLocal = (*env)->NewByteArray(env, desiredBufferFrames * (audioBufferStereo ? 2 : 1)); jbyteArray audioBufferLocal = (*env)->NewByteArray(env, desiredBufferFrames * (audioBufferStereo ? 2 : 1));
if (audioBufferLocal) { if (audioBufferLocal) {
audioBuffer = (*env)->NewGlobalRef(env, audioBufferLocal); jbufobj = (*env)->NewGlobalRef(env, audioBufferLocal);
(*env)->DeleteLocalRef(env, audioBufferLocal); (*env)->DeleteLocalRef(env, audioBufferLocal);
} }
} }
if (audioBuffer == NULL) { if (jbufobj == NULL) {
__android_log_print(ANDROID_LOG_WARN, "SDL", "SDL audio: could not allocate an audio buffer!"); __android_log_print(ANDROID_LOG_WARN, "SDL", "SDL audio: could not allocate an audio buffer!");
return 0; return 0;
} }
if (iscapture) {
captureBuffer = jbufobj;
} else {
audioBuffer = jbufobj;
}
isCopy = JNI_FALSE; isCopy = JNI_FALSE;
if (audioBuffer16Bit) {
audioBufferPinned = (*env)->GetShortArrayElements(env, (jshortArray)audioBuffer, &isCopy); if (is16Bit) {
if (!iscapture) {
audioBufferPinned = (*env)->GetShortArrayElements(env, (jshortArray)audioBuffer, &isCopy);
}
audioBufferFrames = (*env)->GetArrayLength(env, (jshortArray)audioBuffer); audioBufferFrames = (*env)->GetArrayLength(env, (jshortArray)audioBuffer);
} else { } else {
audioBufferPinned = (*env)->GetByteArrayElements(env, (jbyteArray)audioBuffer, &isCopy); if (!iscapture) {
audioBufferPinned = (*env)->GetByteArrayElements(env, (jbyteArray)audioBuffer, &isCopy);
}
audioBufferFrames = (*env)->GetArrayLength(env, (jbyteArray)audioBuffer); audioBufferFrames = (*env)->GetArrayLength(env, (jbyteArray)audioBuffer);
} }
if (audioBufferStereo) { if (audioBufferStereo) {
audioBufferFrames /= 2; audioBufferFrames /= 2;
} }
@ -638,16 +677,73 @@ void Android_JNI_WriteAudioBuffer(void)
/* JNI_COMMIT means the changes are committed to the VM but the buffer remains pinned */ /* JNI_COMMIT means the changes are committed to the VM but the buffer remains pinned */
} }
void Android_JNI_CloseAudioDevice(void) int Android_JNI_CaptureAudioBuffer(void *buffer, int buflen)
{
JNIEnv *env = Android_JNI_GetEnv();
jboolean isCopy = JNI_FALSE;
jint br;
if (captureBuffer16Bit) {
SDL_assert((*env)->GetArrayLength(env, (jshortArray)captureBuffer) == (buflen / 2));
br = (*env)->CallStaticIntMethod(env, mActivityClass, midCaptureReadShortBuffer, (jshortArray)captureBuffer, JNI_TRUE);
if (br > 0) {
jshort *ptr = (*env)->GetShortArrayElements(env, (jshortArray)captureBuffer, &isCopy);
br *= 2;
SDL_memcpy(buffer, ptr, br);
(*env)->ReleaseShortArrayElements(env, (jshortArray)captureBuffer, (jshort *)ptr, JNI_ABORT);
}
} else {
SDL_assert((*env)->GetArrayLength(env, (jshortArray)captureBuffer) == buflen);
br = (*env)->CallStaticIntMethod(env, mActivityClass, midCaptureReadByteBuffer, (jbyteArray)captureBuffer, JNI_TRUE);
if (br > 0) {
jbyte *ptr = (*env)->GetByteArrayElements(env, (jbyteArray)captureBuffer, &isCopy);
SDL_memcpy(buffer, ptr, br);
(*env)->ReleaseByteArrayElements(env, (jbyteArray)captureBuffer, (jbyte *)ptr, JNI_ABORT);
}
}
return (int) br;
}
void Android_JNI_FlushCapturedAudio(void)
{
JNIEnv *env = Android_JNI_GetEnv();
#if 0 /* !!! FIXME: this needs API 23, or it'll do blocking reads and never end. */
if (captureBuffer16Bit) {
const jint len = (*env)->GetArrayLength(env, (jshortArray)captureBuffer);
while ((*env)->CallStaticIntMethod(env, mActivityClass, midCaptureReadShortBuffer, (jshortArray)captureBuffer, JNI_FALSE) == len) { /* spin */ }
} else {
const jint len = (*env)->GetArrayLength(env, (jbyteArray)captureBuffer);
while ((*env)->CallStaticIntMethod(env, mActivityClass, midCaptureReadByteBuffer, (jbyteArray)captureBuffer, JNI_FALSE) == len) { /* spin */ }
}
#else
if (captureBuffer16Bit) {
const jint len = (*env)->GetArrayLength(env, (jshortArray)captureBuffer);
(*env)->CallStaticIntMethod(env, mActivityClass, midCaptureReadShortBuffer, (jshortArray)captureBuffer, JNI_FALSE);
} else {
const jint len = (*env)->GetArrayLength(env, (jbyteArray)captureBuffer);
(*env)->CallStaticIntMethod(env, mActivityClass, midCaptureReadByteBuffer, (jbyteArray)captureBuffer, JNI_FALSE);
}
#endif
}
void Android_JNI_CloseAudioDevice(const int iscapture)
{ {
JNIEnv *env = Android_JNI_GetEnv(); JNIEnv *env = Android_JNI_GetEnv();
(*env)->CallStaticVoidMethod(env, mActivityClass, midAudioQuit); if (iscapture) {
(*env)->CallStaticVoidMethod(env, mActivityClass, midCaptureClose);
if (audioBuffer) { if (captureBuffer) {
(*env)->DeleteGlobalRef(env, audioBuffer); (*env)->DeleteGlobalRef(env, captureBuffer);
audioBuffer = NULL; captureBuffer = NULL;
audioBufferPinned = NULL; }
} else {
(*env)->CallStaticVoidMethod(env, mActivityClass, midAudioClose);
if (audioBuffer) {
(*env)->DeleteGlobalRef(env, audioBuffer);
audioBuffer = NULL;
audioBufferPinned = NULL;
}
} }
} }

View File

@ -40,10 +40,12 @@ extern void Android_JNI_HideTextInput(void);
extern ANativeWindow* Android_JNI_GetNativeWindow(void); extern ANativeWindow* Android_JNI_GetNativeWindow(void);
/* Audio support */ /* Audio support */
extern int Android_JNI_OpenAudioDevice(int sampleRate, int is16Bit, int channelCount, int desiredBufferFrames); extern int Android_JNI_OpenAudioDevice(int iscapture, int sampleRate, int is16Bit, int channelCount, int desiredBufferFrames);
extern void* Android_JNI_GetAudioBuffer(void); extern void* Android_JNI_GetAudioBuffer(void);
extern void Android_JNI_WriteAudioBuffer(void); extern void Android_JNI_WriteAudioBuffer(void);
extern void Android_JNI_CloseAudioDevice(void); extern int Android_JNI_CaptureAudioBuffer(void *buffer, int buflen);
extern void Android_JNI_FlushCapturedAudio(void);
extern void Android_JNI_CloseAudioDevice(const int iscapture);
#include "SDL_rwops.h" #include "SDL_rwops.h"