/*
* Copyright (C) 2008 The Android Open Source Project
*
* 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.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "AudioTrack-JNI"
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <math.h>
#include <jni.h>
#include <JNIHelp.h>
#include <android_runtime/AndroidRuntime.h>
#include <utils/Log.h>
#include <media/AudioSystem.h>
#include <media/AudioTrack.h>
#include <binder/MemoryHeapBase.h>
#include <binder/MemoryBase.h>
#include <cutils/bitops.h>
#include <system/audio.h>
// ----------------------------------------------------------------------------
using namespace android;
// ----------------------------------------------------------------------------
static const char* const kClassPathName = "android/media/AudioTrack";
struct fields_t {
// these fields provide access from C++ to the...
jmethodID postNativeEventInJava; //... event post callback method
int PCM16; //... format constants
int PCM8; //... format constants
int MODE_STREAM; //... memory mode
int MODE_STATIC; //... memory mode
jfieldID nativeTrackInJavaObj; // stores in Java the native AudioTrack object
jfieldID jniData; // stores in Java additional resources used by the native AudioTrack
};
static fields_t javaAudioTrackFields;
struct audiotrack_callback_cookie {
jclass audioTrack_class;
jobject audioTrack_ref;
bool busy;
Condition cond;
};
// ----------------------------------------------------------------------------
class AudioTrackJniStorage {
public:
sp<MemoryHeapBase> mMemHeap;
sp<MemoryBase> mMemBase;
audiotrack_callback_cookie mCallbackData;
audio_stream_type_t mStreamType;
AudioTrackJniStorage() {
mCallbackData.audioTrack_class = 0;
mCallbackData.audioTrack_ref = 0;
mStreamType = AUDIO_STREAM_DEFAULT;
}
~AudioTrackJniStorage() {
mMemBase.clear();
mMemHeap.clear();
}
bool allocSharedMem(int sizeInBytes) {
mMemHeap = new MemoryHeapBase(sizeInBytes, 0, "AudioTrack Heap Base");
if (mMemHeap->getHeapID() < 0) {
return false;
}
mMemBase = new MemoryBase(mMemHeap, 0, sizeInBytes);
return true;
}
};
static Mutex sLock;
static SortedVector <audiotrack_callback_cookie *> sAudioTrackCallBackCookies;
// ----------------------------------------------------------------------------
#define DEFAULT_OUTPUT_SAMPLE_RATE 44100
#define AUDIOTRACK_SUCCESS 0
#define AUDIOTRACK_ERROR -1
#define AUDIOTRACK_ERROR_BAD_VALUE -2
#define AUDIOTRACK_ERROR_INVALID_OPERATION -3
#define AUDIOTRACK_ERROR_SETUP_AUDIOSYSTEM -16
#define AUDIOTRACK_ERROR_SETUP_INVALIDCHANNELMASK -17
#define AUDIOTRACK_ERROR_SETUP_INVALIDFORMAT -18
#define AUDIOTRACK_ERROR_SETUP_INVALIDSTREAMTYPE -19
#define AUDIOTRACK_ERROR_SETUP_NATIVEINITFAILED -20
jint android_media_translateErrorCode(int code) {
switch (code) {
case NO_ERROR:
return AUDIOTRACK_SUCCESS;
case BAD_VALUE:
return AUDIOTRACK_ERROR_BAD_VALUE;
case INVALID_OPERATION:
return AUDIOTRACK_ERROR_INVALID_OPERATION;
default:
return AUDIOTRACK_ERROR;
}
}
// ----------------------------------------------------------------------------
static void audioCallback(int event, void* user, void *info) {
audiotrack_callback_cookie *callbackInfo = (audiotrack_callback_cookie *)user;
{
Mutex::Autolock l(sLock);
if (sAudioTrackCallBackCookies.indexOf(callbackInfo) < 0) {
return;
}
callbackInfo->busy = true;
}
if (event == AudioTrack::EVENT_MORE_DATA) {
// set size to 0 to signal we're not using the callback to write more data
AudioTrack::Buffer* pBuff = (AudioTrack::Buffer*)info;
pBuff->size = 0;
} else if (event == AudioTrack::EVENT_MARKER) {
JNIEnv *env = AndroidRuntime::getJNIEnv();
if (user && env) {
env->CallStaticVoidMethod(
callbackInfo->audioTrack_class,
javaAudioTrackFields.postNativeEventInJava,
callbackInfo->audioTrack_ref, event, 0,0, NULL);
if (env->ExceptionCheck()) {
env->ExceptionDescribe();
env->ExceptionClear();
}
}
} else if (event == AudioTrack::EVENT_NEW_POS) {
JNIEnv *env = AndroidRuntime::getJNIEnv();
if (user && env) {
env->CallStaticVoidMethod(
callbackInfo->audioTrack_class,
javaAudioTrackFields.postNativeEventInJava,
callbackInfo->audioTrack_ref, event, 0,0, NULL);
if (env->ExceptionCheck()) {
env->ExceptionDescribe();
env->ExceptionClear();
}
}
}
{
Mutex::Autolock l(sLock);
callbackInfo->busy = false;
callbackInfo->cond.broadcast();
}
}
// ----------------------------------------------------------------------------
static sp<AudioTrack> getAudioTrack(JNIEnv* env, jobject thiz)
{
Mutex::Autolock l(sLock);
AudioTrack* const at =
(AudioTrack*)env->GetIntField(thiz, javaAudioTrackFields.nativeTrackInJavaObj);
return sp<AudioTrack>(at);
}
static sp<AudioTrack> setAudioTrack(JNIEnv* env, jobject thiz, const sp<AudioTrack>& at)
{
Mutex::Autolock l(sLock);
sp<AudioTrack> old =
(AudioTrack*)env->GetIntField(thiz, javaAudioTrackFields.nativeTrackInJavaObj);
if (at.get()) {
at->incStrong(thiz);
}
if (old != 0) {
old->decStrong(thiz);
}
env->SetIntField(thiz, javaAudioTrackFields.nativeTrackInJavaObj, (int)at.get());
return old;
}
// ----------------------------------------------------------------------------
static int
android_media_AudioTrack_native_setup(JNIEnv *env, jobject thiz, jobject weak_this,
jint streamType, jint sampleRateInHertz, jint javaChannelMask,
jint audioFormat, jint buffSizeInBytes, jint memoryMode, jintArray jSession)
{
ALOGV("sampleRate=%d, audioFormat(from Java)=%d, channel mask=%x, buffSize=%d",
sampleRateInHertz, audioFormat, javaChannelMask, buffSizeInBytes);
int afSampleRate;
int afFrameCount;
if (AudioSystem::getOutputFrameCount(&afFrameCount, (audio_stream_type_t) streamType) != NO_ERROR) {
ALOGE("Error creating AudioTrack: Could not get AudioSystem frame count.");
return AUDIOTRACK_ERROR_SETUP_AUDIOSYSTEM;
}
if (AudioSystem::getOutputSamplingRate(&afSampleRate, (audio_stream_type_t) streamType) != NO_ERROR) {
ALOGE("Error creating AudioTrack: Could not get AudioSystem sampling rate.");
return AUDIOTRACK_ERROR_SETUP_AUDIOSYSTEM;
}
// Java channel masks don't map directly to the native definition, but it's a simple shift
// to skip the two deprecated channel configurations "default" and "mono".
uint32_t nativeChannelMask = ((uint32_t)javaChannelMask) >> 2;
if (!audio_is_output_channel(nativeChannelMask)) {
ALOGE("Error creating AudioTrack: invalid channel mask.");
return AUDIOTRACK_ERROR_SETUP_INVALIDCHANNELMASK;
}
int nbChannels = popcount(nativeChannelMask);
// check the stream type
audio_stream_type_t atStreamType;
switch (streamType) {
case AUDIO_STREAM_VOICE_CALL:
case AUDIO_STREAM_SYSTEM:
case AUDIO_STREAM_RING:
case AUDIO_STREAM_MUSIC:
case AUDIO_STREAM_ALARM:
case AUDIO_STREAM_NOTIFICATION:
case AUDIO_STREAM_BLUETOOTH_SCO:
case AUDIO_STREAM_DTMF:
atStreamType = (audio_stream_type_t) streamType;
break;
default:
ALOGE("Error creating AudioTrack: unknown stream type.");
return AUDIOTRACK_ERROR_SETUP_INVALIDSTREAMTYPE;
}
// check the format.
// This function was called from Java, so we compare the format against the Java constants
if ((audioFormat != javaAudioTrackFields.PCM16) && (audioFormat != javaAudioTrackFields.PCM8)) {
ALOGE("Error creating AudioTrack: unsupported audio format.");
return AUDIOTRACK_ERROR_SETUP_INVALIDFORMAT;
}
// for the moment 8bitPCM in MODE_STATIC is not supported natively in the AudioTrack C++ class
// so we declare everything as 16bitPCM, the 8->16bit conversion for MODE_STATIC will be handled
// in android_media_AudioTrack_native_write_byte()
if ((audioFormat == javaAudioTrackFields.PCM8)
&& (memoryMode == javaAudioTrackFields.MODE_STATIC)) {
ALOGV("android_media_AudioTrack_native_setup(): requesting MODE_STATIC for 8bit \
buff size of %dbytes, switching to 16bit, buff size of %dbytes",
buffSizeInBytes, 2*buffSizeInBytes);
audioFormat = javaAudioTrackFields.PCM16;
// we will need twice the memory to store the data
buffSizeInBytes *= 2;
}
// compute the frame count
int bytesPerSample = audioFormat == javaAudioTrackFields.PCM16 ? 2 : 1;
audio_format_t format = audioFormat == javaAudioTrackFields.PCM16 ?
AUDIO_FORMAT_PCM_16_BIT : AUDIO_FORMAT_PCM_8_BIT;
int frameCount = buffSizeInBytes / (nbChannels * bytesPerSample);
jclass clazz = env->GetObjectClass(thiz);
if (clazz == NULL) {
ALOGE("Can't find %s when setting up callback.", kClassPathName);
return AUDIOTRACK_ERROR_SETUP_NATIVEINITFAILED;
}
if (jSession == NULL) {
ALOGE("Error creating AudioTrack: invalid session ID pointer");
return AUDIOTRACK_ERROR;
}
jint* nSession = (jint *) env->GetPrimitiveArrayCritical(jSession, NULL);
if (nSession == NULL) {
ALOGE("Error creating AudioTrack: Error retrieving session id pointer");
return AUDIOTRACK_ERROR;
}
int sessionId = nSession[0];
env->ReleasePrimitiveArrayCritical(jSession, nSession, 0);
nSession = NULL;
// create the native AudioTrack object
sp<AudioTrack> lpTrack = new AudioTrack();
if (lpTrack == NULL) {
ALOGE("Error creating uninitialized AudioTrack");
return AUDIOTRACK_ERROR_SETUP_NATIVEINITFAILED;
}
// initialize the callback information:
// this data will be passed with every AudioTrack callback
AudioTrackJniStorage* lpJniStorage = new AudioTrackJniStorage();
lpJniStorage->mStreamType = atStreamType;
lpJniStorage->mCallbackData.audioTrack_class = (jclass)env->NewGlobalRef(clazz);
// we use a weak reference so the AudioTrack object can be garbage collected.
lpJniStorage->mCallbackData.audioTrack_ref = env->NewGlobalRef(weak_this);
lpJniStorage->mCallbackData.busy = false;
// initialize the native AudioTrack object
if (memoryMode == javaAudioTrackFields.MODE_STREAM) {
lpTrack->set(
atStreamType,// stream type
sampleRateInHertz,
format,// word length, PCM
nativeChannelMask,
frameCount,
AUDIO_OUTPUT_FLAG_NONE,
audioCallback, &(lpJniStorage->mCallbackData),//callback, callback data (user)
0,// notificationFrames == 0 since not using EVENT_MORE_DATA to feed the AudioTrack
0,// shared mem
true,// thread can call Java
sessionId);// audio session ID
} else if (memoryMode == javaAudioTrackFields.MODE_STATIC) {
// AudioTrack is using shared memory
if (!lpJniStorage->allocSharedMem(buffSizeInBytes)) {
ALOGE("Error creating AudioTrack in static mode: error creating mem heap base");
goto native_init_failure;
}
lpTrack->set(
atStreamType,// stream type
sampleRateInHertz,
format,// word length, PCM
nativeChannelMask,
frameCount,
AUDIO_OUTPUT_FLAG_NONE,
audioCallback, &(lpJniStorage->mCallbackData),//callback, callback data (user));
0,// notificationFrames == 0 since not using EVENT_MORE_DATA to feed the AudioTrack
lpJniStorage->mMemBase,// shared mem
true,// thread can call Java
sessionId);// audio session ID
}
if (lpTrack->initCheck() != NO_ERROR) {
ALOGE("Error initializing AudioTrack");
goto native_init_failure;
}
nSession = (jint *) env->GetPrimitiveArrayCritical(jSession, NULL);
if (nSession == NULL) {
ALOGE("Error creating AudioTrack: Error retrieving session id pointer");
goto native_init_failure;
}
// read the audio session ID back from AudioTrack in case we create a new session
nSession[0] = lpTrack->getSessionId();
env->ReleasePrimitiveArrayCritical(jSession, nSession, 0);
nSession = NULL;
{ // scope for the lock
Mutex::Autolock l(sLock);
sAudioTrackCallBackCookies.add(&lpJniStorage->mCallbackData);
}
// save our newly created C++ AudioTrack in the "nativeTrackInJavaObj" field
// of the Java object (in mNativeTrackInJavaObj)
setAudioTrack(env, thiz, lpTrack);
// save the JNI resources so we can free them later
//ALOGV("storing lpJniStorage: %x\n", (int)lpJniStorage);
env->SetIntField(thiz, javaAudioTrackFields.jniData, (int)lpJniStorage);
return AUDIOTRACK_SUCCESS;
// failures:
native_init_failure:
if (nSession != NULL) {
env->ReleasePrimitiveArrayCritical(jSession, nSession, 0);
}
env->DeleteGlobalRef(lpJniStorage->mCallbackData.audioTrack_class);
env->DeleteGlobalRef(lpJniStorage->mCallbackData.audioTrack_ref);
delete lpJniStorage;
env->SetIntField(thiz, javaAudioTrackFields.jniData, 0);
return AUDIOTRACK_ERROR_SETUP_NATIVEINITFAILED;
}
// ----------------------------------------------------------------------------
static void
android_media_AudioTrack_start(JNIEnv *env, jobject thiz)
{
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for start()");
return;
}
lpTrack->start();
}
// ----------------------------------------------------------------------------
static void
android_media_AudioTrack_stop(JNIEnv *env, jobject thiz)
{
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for stop()");
return;
}
lpTrack->stop();
}
// ----------------------------------------------------------------------------
static void
android_media_AudioTrack_pause(JNIEnv *env, jobject thiz)
{
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for pause()");
return;
}
lpTrack->pause();
}
// ----------------------------------------------------------------------------
static void
android_media_AudioTrack_flush(JNIEnv *env, jobject thiz)
{
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for flush()");
return;
}
lpTrack->flush();
}
// ----------------------------------------------------------------------------
static void
android_media_AudioTrack_set_volume(JNIEnv *env, jobject thiz, jfloat leftVol, jfloat rightVol )
{
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for setVolume()");
return;
}
lpTrack->setVolume(leftVol, rightVol);
}
// ----------------------------------------------------------------------------
#define CALLBACK_COND_WAIT_TIMEOUT_MS 1000
static void android_media_AudioTrack_native_release(JNIEnv *env, jobject thiz) {
sp<AudioTrack> lpTrack = setAudioTrack(env, thiz, 0);
if (lpTrack == NULL) {
return;
}
//ALOGV("deleting lpTrack: %x\n", (int)lpTrack);
lpTrack->stop();
// delete the JNI data
AudioTrackJniStorage* pJniStorage = (AudioTrackJniStorage *)env->GetIntField(
thiz, javaAudioTrackFields.jniData);
// reset the native resources in the Java object so any attempt to access
// them after a call to release fails.
env->SetIntField(thiz, javaAudioTrackFields.jniData, 0);
if (pJniStorage) {
Mutex::Autolock l(sLock);
audiotrack_callback_cookie *lpCookie = &pJniStorage->mCallbackData;
//ALOGV("deleting pJniStorage: %x\n", (int)pJniStorage);
while (lpCookie->busy) {
if (lpCookie->cond.waitRelative(sLock,
milliseconds(CALLBACK_COND_WAIT_TIMEOUT_MS)) !=
NO_ERROR) {
break;
}
}
sAudioTrackCallBackCookies.remove(lpCookie);
// delete global refs created in native_setup
env->DeleteGlobalRef(lpCookie->audioTrack_class);
env->DeleteGlobalRef(lpCookie->audioTrack_ref);
delete pJniStorage;
}
}
// ----------------------------------------------------------------------------
static void android_media_AudioTrack_native_finalize(JNIEnv *env, jobject thiz) {
//ALOGV("android_media_AudioTrack_native_finalize jobject: %x\n", (int)thiz);
android_media_AudioTrack_native_release(env, thiz);
}
// ----------------------------------------------------------------------------
jint writeToTrack(const sp<AudioTrack>& track, jint audioFormat, jbyte* data,
jint offsetInBytes, jint sizeInBytes) {
// give the data to the native AudioTrack object (the data starts at the offset)
ssize_t written = 0;
// regular write() or copy the data to the AudioTrack's shared memory?
if (track->sharedBuffer() == 0) {
written = track->write(data + offsetInBytes, sizeInBytes);
} else {
if (audioFormat == javaAudioTrackFields.PCM16) {
// writing to shared memory, check for capacity
if ((size_t)sizeInBytes > track->sharedBuffer()->size()) {
sizeInBytes = track->sharedBuffer()->size();
}
memcpy(track->sharedBuffer()->pointer(), data + offsetInBytes, sizeInBytes);
written = sizeInBytes;
} else if (audioFormat == javaAudioTrackFields.PCM8) {
// data contains 8bit data we need to expand to 16bit before copying
// to the shared memory
// writing to shared memory, check for capacity,
// note that input data will occupy 2X the input space due to 8 to 16bit conversion
if (((size_t)sizeInBytes)*2 > track->sharedBuffer()->size()) {
sizeInBytes = track->sharedBuffer()->size() / 2;
}
int count = sizeInBytes;
int16_t *dst = (int16_t *)track->sharedBuffer()->pointer();
const int8_t *src = (const int8_t *)(data + offsetInBytes);
while (count--) {
*dst++ = (int16_t)(*src++^0x80) << 8;
}
// even though we wrote 2*sizeInBytes, we only report sizeInBytes as written to hide
// the 8bit mixer restriction from the user of this function
written = sizeInBytes;
}
}
return written;
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_native_write_byte(JNIEnv *env, jobject thiz,
jbyteArray javaAudioData,
jint offsetInBytes, jint sizeInBytes,
jint javaAudioFormat) {
//ALOGV("android_media_AudioTrack_native_write_byte(offset=%d, sizeInBytes=%d) called",
// offsetInBytes, sizeInBytes);
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for write()");
return 0;
}
// get the pointer for the audio data from the java array
// NOTE: We may use GetPrimitiveArrayCritical() when the JNI implementation changes in such
// a way that it becomes much more efficient. When doing so, we will have to prevent the
// AudioSystem callback to be called while in critical section (in case of media server
// process crash for instance)
jbyte* cAudioData = NULL;
if (javaAudioData) {
cAudioData = (jbyte *)env->GetByteArrayElements(javaAudioData, NULL);
if (cAudioData == NULL) {
ALOGE("Error retrieving source of audio data to play, can't play");
return 0; // out of memory or no data to load
}
} else {
ALOGE("NULL java array of audio data to play, can't play");
return 0;
}
jint written = writeToTrack(lpTrack, javaAudioFormat, cAudioData, offsetInBytes, sizeInBytes);
env->ReleaseByteArrayElements(javaAudioData, cAudioData, 0);
//ALOGV("write wrote %d (tried %d) bytes in the native AudioTrack with offset %d",
// (int)written, (int)(sizeInBytes), (int)offsetInBytes);
return written;
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_native_write_short(JNIEnv *env, jobject thiz,
jshortArray javaAudioData,
jint offsetInShorts, jint sizeInShorts,
jint javaAudioFormat) {
return (android_media_AudioTrack_native_write_byte(env, thiz,
(jbyteArray) javaAudioData,
offsetInShorts*2, sizeInShorts*2,
javaAudioFormat)
/ 2);
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_get_native_frame_count(JNIEnv *env, jobject thiz) {
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for frameCount()");
return AUDIOTRACK_ERROR;
}
return lpTrack->frameCount();
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_set_playback_rate(JNIEnv *env, jobject thiz,
jint sampleRateInHz) {
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for setSampleRate()");
return AUDIOTRACK_ERROR;
}
return android_media_translateErrorCode(lpTrack->setSampleRate(sampleRateInHz));
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_get_playback_rate(JNIEnv *env, jobject thiz) {
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for getSampleRate()");
return AUDIOTRACK_ERROR;
}
return (jint) lpTrack->getSampleRate();
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_set_marker_pos(JNIEnv *env, jobject thiz,
jint markerPos) {
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for setMarkerPosition()");
return AUDIOTRACK_ERROR;
}
return android_media_translateErrorCode( lpTrack->setMarkerPosition(markerPos) );
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_get_marker_pos(JNIEnv *env, jobject thiz) {
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
uint32_t markerPos = 0;
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for getMarkerPosition()");
return AUDIOTRACK_ERROR;
}
lpTrack->getMarkerPosition(&markerPos);
return (jint)markerPos;
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_set_pos_update_period(JNIEnv *env, jobject thiz,
jint period) {
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for setPositionUpdatePeriod()");
return AUDIOTRACK_ERROR;
}
return android_media_translateErrorCode( lpTrack->setPositionUpdatePeriod(period) );
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_get_pos_update_period(JNIEnv *env, jobject thiz) {
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
uint32_t period = 0;
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for getPositionUpdatePeriod()");
return AUDIOTRACK_ERROR;
}
lpTrack->getPositionUpdatePeriod(&period);
return (jint)period;
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_set_position(JNIEnv *env, jobject thiz,
jint position) {
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for setPosition()");
return AUDIOTRACK_ERROR;
}
return android_media_translateErrorCode( lpTrack->setPosition(position) );
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_get_position(JNIEnv *env, jobject thiz) {
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
uint32_t position = 0;
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for getPosition()");
return AUDIOTRACK_ERROR;
}
lpTrack->getPosition(&position);
return (jint)position;
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_set_loop(JNIEnv *env, jobject thiz,
jint loopStart, jint loopEnd, jint loopCount) {
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for setLoop()");
return AUDIOTRACK_ERROR;
}
return android_media_translateErrorCode( lpTrack->setLoop(loopStart, loopEnd, loopCount) );
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_reload(JNIEnv *env, jobject thiz) {
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for reload()");
return AUDIOTRACK_ERROR;
}
return android_media_translateErrorCode( lpTrack->reload() );
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_get_output_sample_rate(JNIEnv *env, jobject thiz,
jint javaStreamType) {
int afSamplingRate;
// convert the stream type from Java to native value
// FIXME: code duplication with android_media_AudioTrack_native_setup()
audio_stream_type_t nativeStreamType;
switch (javaStreamType) {
case AUDIO_STREAM_VOICE_CALL:
case AUDIO_STREAM_SYSTEM:
case AUDIO_STREAM_RING:
case AUDIO_STREAM_MUSIC:
case AUDIO_STREAM_ALARM:
case AUDIO_STREAM_NOTIFICATION:
case AUDIO_STREAM_BLUETOOTH_SCO:
case AUDIO_STREAM_DTMF:
nativeStreamType = (audio_stream_type_t) javaStreamType;
break;
default:
nativeStreamType = AUDIO_STREAM_DEFAULT;
break;
}
if (AudioSystem::getOutputSamplingRate(&afSamplingRate, nativeStreamType) != NO_ERROR) {
ALOGE("AudioSystem::getOutputSamplingRate() for stream type %d failed in AudioTrack JNI",
nativeStreamType);
return DEFAULT_OUTPUT_SAMPLE_RATE;
} else {
return afSamplingRate;
}
}
// ----------------------------------------------------------------------------
// returns the minimum required size for the successful creation of a streaming AudioTrack
// returns -1 if there was an error querying the hardware.
static jint android_media_AudioTrack_get_min_buff_size(JNIEnv *env, jobject thiz,
jint sampleRateInHertz, jint nbChannels, jint audioFormat) {
int frameCount = 0;
if (AudioTrack::getMinFrameCount(&frameCount, AUDIO_STREAM_DEFAULT,
sampleRateInHertz) != NO_ERROR) {
return -1;
}
return frameCount * nbChannels * (audioFormat == javaAudioTrackFields.PCM16 ? 2 : 1);
}
// ----------------------------------------------------------------------------
static void
android_media_AudioTrack_setAuxEffectSendLevel(JNIEnv *env, jobject thiz, jfloat level )
{
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL ) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for setAuxEffectSendLevel()");
return;
}
lpTrack->setAuxEffectSendLevel(level);
}
// ----------------------------------------------------------------------------
static jint android_media_AudioTrack_attachAuxEffect(JNIEnv *env, jobject thiz,
jint effectId) {
sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
if (lpTrack == NULL) {
jniThrowException(env, "java/lang/IllegalStateException",
"Unable to retrieve AudioTrack pointer for attachAuxEffect()");
return AUDIOTRACK_ERROR;
}
return android_media_translateErrorCode( lpTrack->attachAuxEffect(effectId) );
}
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
static JNINativeMethod gMethods[] = {
// name, signature, funcPtr
{"native_start", "()V", (void *)android_media_AudioTrack_start},
{"native_stop", "()V", (void *)android_media_AudioTrack_stop},
{"native_pause", "()V", (void *)android_media_AudioTrack_pause},
{"native_flush", "()V", (void *)android_media_AudioTrack_flush},
{"native_setup", "(Ljava/lang/Object;IIIIII[I)I",
(void *)android_media_AudioTrack_native_setup},
{"native_finalize", "()V", (void *)android_media_AudioTrack_native_finalize},
{"native_release", "()V", (void *)android_media_AudioTrack_native_release},
{"native_write_byte", "([BIII)I", (void *)android_media_AudioTrack_native_write_byte},
{"native_write_short", "([SIII)I", (void *)android_media_AudioTrack_native_write_short},
{"native_setVolume", "(FF)V", (void *)android_media_AudioTrack_set_volume},
{"native_get_native_frame_count",
"()I", (void *)android_media_AudioTrack_get_native_frame_count},
{"native_set_playback_rate",
"(I)I", (void *)android_media_AudioTrack_set_playback_rate},
{"native_get_playback_rate",
"()I", (void *)android_media_AudioTrack_get_playback_rate},
{"native_set_marker_pos","(I)I", (void *)android_media_AudioTrack_set_marker_pos},
{"native_get_marker_pos","()I", (void *)android_media_AudioTrack_get_marker_pos},
{"native_set_pos_update_period",
"(I)I", (void *)android_media_AudioTrack_set_pos_update_period},
{"native_get_pos_update_period",
"()I", (void *)android_media_AudioTrack_get_pos_update_period},
{"native_set_position", "(I)I", (void *)android_media_AudioTrack_set_position},
{"native_get_position", "()I", (void *)android_media_AudioTrack_get_position},
{"native_set_loop", "(III)I", (void *)android_media_AudioTrack_set_loop},
{"native_reload_static", "()I", (void *)android_media_AudioTrack_reload},
{"native_get_output_sample_rate",
"(I)I", (void *)android_media_AudioTrack_get_output_sample_rate},
{"native_get_min_buff_size",
"(III)I", (void *)android_media_AudioTrack_get_min_buff_size},
{"native_setAuxEffectSendLevel",
"(F)V", (void *)android_media_AudioTrack_setAuxEffectSendLevel},
{"native_attachAuxEffect",
"(I)I", (void *)android_media_AudioTrack_attachAuxEffect},
};
// field names found in android/media/AudioTrack.java
#define JAVA_POSTEVENT_CALLBACK_NAME "postEventFromNative"
#define JAVA_CONST_PCM16_NAME "ENCODING_PCM_16BIT"
#define JAVA_CONST_PCM8_NAME "ENCODING_PCM_8BIT"
#define JAVA_CONST_BUFFER_COUNT_NAME "BUFFER_COUNT"
#define JAVA_CONST_STREAM_VOICE_CALL_NAME "STREAM_VOICE_CALL"
#define JAVA_CONST_STREAM_SYSTEM_NAME "STREAM_SYSTEM"
#define JAVA_CONST_STREAM_RING_NAME "STREAM_RING"
#define JAVA_CONST_STREAM_MUSIC_NAME "STREAM_MUSIC"
#define JAVA_CONST_STREAM_ALARM_NAME "STREAM_ALARM"
#define JAVA_CONST_STREAM_NOTIFICATION_NAME "STREAM_NOTIFICATION"
#define JAVA_CONST_STREAM_BLUETOOTH_SCO_NAME "STREAM_BLUETOOTH_SCO"
#define JAVA_CONST_STREAM_DTMF_NAME "STREAM_DTMF"
#define JAVA_CONST_MODE_STREAM_NAME "MODE_STREAM"
#define JAVA_CONST_MODE_STATIC_NAME "MODE_STATIC"
#define JAVA_NATIVETRACKINJAVAOBJ_FIELD_NAME "mNativeTrackInJavaObj"
#define JAVA_JNIDATA_FIELD_NAME "mJniData"
#define JAVA_AUDIOFORMAT_CLASS_NAME "android/media/AudioFormat"
#define JAVA_AUDIOMANAGER_CLASS_NAME "android/media/AudioManager"
// ----------------------------------------------------------------------------
// preconditions:
// theClass is valid
bool android_media_getIntConstantFromClass(JNIEnv* pEnv, jclass theClass, const char* className,
const char* constName, int* constVal) {
jfieldID javaConst = NULL;
javaConst = pEnv->GetStaticFieldID(theClass, constName, "I");
if (javaConst != NULL) {
*constVal = pEnv->GetStaticIntField(theClass, javaConst);
return true;
} else {
ALOGE("Can't find %s.%s", className, constName);
return false;
}
}
// ----------------------------------------------------------------------------
int register_android_media_AudioTrack(JNIEnv *env)
{
javaAudioTrackFields.nativeTrackInJavaObj = NULL;
javaAudioTrackFields.postNativeEventInJava = NULL;
// Get the AudioTrack class
jclass audioTrackClass = env->FindClass(kClassPathName);
if (audioTrackClass == NULL) {
ALOGE("Can't find %s", kClassPathName);
return -1;
}
// Get the postEvent method
javaAudioTrackFields.postNativeEventInJava = env->GetStaticMethodID(
audioTrackClass,
JAVA_POSTEVENT_CALLBACK_NAME, "(Ljava/lang/Object;IIILjava/lang/Object;)V");
if (javaAudioTrackFields.postNativeEventInJava == NULL) {
ALOGE("Can't find AudioTrack.%s", JAVA_POSTEVENT_CALLBACK_NAME);
return -1;
}
// Get the variables fields
// nativeTrackInJavaObj
javaAudioTrackFields.nativeTrackInJavaObj = env->GetFieldID(
audioTrackClass,
JAVA_NATIVETRACKINJAVAOBJ_FIELD_NAME, "I");
if (javaAudioTrackFields.nativeTrackInJavaObj == NULL) {
ALOGE("Can't find AudioTrack.%s", JAVA_NATIVETRACKINJAVAOBJ_FIELD_NAME);
return -1;
}
// jniData;
javaAudioTrackFields.jniData = env->GetFieldID(
audioTrackClass,
JAVA_JNIDATA_FIELD_NAME, "I");
if (javaAudioTrackFields.jniData == NULL) {
ALOGE("Can't find AudioTrack.%s", JAVA_JNIDATA_FIELD_NAME);
return -1;
}
// Get the memory mode constants
if ( !android_media_getIntConstantFromClass(env, audioTrackClass,
kClassPathName,
JAVA_CONST_MODE_STATIC_NAME, &(javaAudioTrackFields.MODE_STATIC))
|| !android_media_getIntConstantFromClass(env, audioTrackClass,
kClassPathName,
JAVA_CONST_MODE_STREAM_NAME, &(javaAudioTrackFields.MODE_STREAM)) ) {
// error log performed in android_media_getIntConstantFromClass()
return -1;
}
// Get the format constants from the AudioFormat class
jclass audioFormatClass = NULL;
audioFormatClass = env->FindClass(JAVA_AUDIOFORMAT_CLASS_NAME);
if (audioFormatClass == NULL) {
ALOGE("Can't find %s", JAVA_AUDIOFORMAT_CLASS_NAME);
return -1;
}
if ( !android_media_getIntConstantFromClass(env, audioFormatClass,
JAVA_AUDIOFORMAT_CLASS_NAME,
JAVA_CONST_PCM16_NAME, &(javaAudioTrackFields.PCM16))
|| !android_media_getIntConstantFromClass(env, audioFormatClass,
JAVA_AUDIOFORMAT_CLASS_NAME,
JAVA_CONST_PCM8_NAME, &(javaAudioTrackFields.PCM8)) ) {
// error log performed in android_media_getIntConstantFromClass()
return -1;
}
return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
}
// ----------------------------------------------------------------------------