gecko-dev/dom/plugins/base/android/ANPAudio.cpp

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8.9 KiB
C++

/* -*- Mode: c++; c-basic-offset: 2; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "base/basictypes.h"
#include "AndroidBridge.h"
#include <android/log.h>
#include <stdlib.h>
#include <time.h>
#include "assert.h"
#include "ANPBase.h"
#include "nsIThread.h"
#include "nsThreadUtils.h"
#define LOG(args...) __android_log_print(ANDROID_LOG_INFO, "GeckoPluginsAudio" , ## args)
#define ASSIGN(obj, name) (obj)->name = anp_audio_##name
/* android.media.AudioTrack */
struct AudioTrack {
jclass at_class;
jmethodID constructor;
jmethodID flush;
jmethodID pause;
jmethodID play;
jmethodID setvol;
jmethodID stop;
jmethodID write;
jmethodID getpos;
jmethodID getstate;
jmethodID release;
};
enum AudioTrackMode {
MODE_STATIC = 0,
MODE_STREAM = 1
};
/* android.media.AudioManager */
enum AudioManagerStream {
STREAM_VOICE_CALL = 0,
STREAM_SYSTEM = 1,
STREAM_RING = 2,
STREAM_MUSIC = 3,
STREAM_ALARM = 4,
STREAM_NOTIFICATION = 5,
STREAM_DTMF = 8
};
/* android.media.AudioFormat */
enum AudioFormatChannel {
CHANNEL_OUT_MONO = 4,
CHANNEL_OUT_STEREO = 12
};
enum AudioFormatEncoding {
ENCODING_PCM_16BIT = 2,
ENCODING_PCM_8BIT = 3
};
enum AudioFormatState {
STATE_UNINITIALIZED = 0,
STATE_INITIALIZED = 1,
STATE_NO_STATIC_DATA = 2
};
static struct AudioTrack at;
static jclass
init_jni_bindings(JNIEnv *jenv) {
jclass jc =
(jclass)jenv->NewGlobalRef(jenv->FindClass("android/media/AudioTrack"));
at.constructor = jenv->GetMethodID(jc, "<init>", "(IIIIII)V");
at.flush = jenv->GetMethodID(jc, "flush", "()V");
at.pause = jenv->GetMethodID(jc, "pause", "()V");
at.play = jenv->GetMethodID(jc, "play", "()V");
at.setvol = jenv->GetMethodID(jc, "setStereoVolume", "(FF)I");
at.stop = jenv->GetMethodID(jc, "stop", "()V");
at.write = jenv->GetMethodID(jc, "write", "([BII)I");
at.getpos = jenv->GetMethodID(jc, "getPlaybackHeadPosition", "()I");
at.getstate = jenv->GetMethodID(jc, "getState", "()I");
at.release = jenv->GetMethodID(jc, "release", "()V");
return jc;
}
struct ANPAudioTrack {
jobject output_unit;
jclass at_class;
unsigned int rate;
unsigned int channels;
unsigned int bufferSize;
unsigned int isStopped;
unsigned int keepGoing;
void* user;
ANPAudioCallbackProc proc;
ANPSampleFormat format;
};
class AudioRunnable : public nsRunnable
{
public:
NS_DECL_NSIRUNNABLE
AudioRunnable(ANPAudioTrack* aAudioTrack) {
mTrack = aAudioTrack;
}
ANPAudioTrack* mTrack;
};
NS_IMETHODIMP
AudioRunnable::Run()
{
PR_SetCurrentThreadName("Android Audio");
JNIEnv* jenv = GetJNIForThread();
if (!jenv)
return NS_ERROR_FAILURE;
mozilla::AutoLocalJNIFrame autoFrame(jenv, 2);
jbyteArray bytearray = jenv->NewByteArray(mTrack->bufferSize);
if (!bytearray) {
LOG("AudioRunnable:: Run. Could not create bytearray");
return NS_ERROR_FAILURE;
}
jbyte *byte = jenv->GetByteArrayElements(bytearray, NULL);
if (!byte) {
LOG("AudioRunnable:: Run. Could not create bytearray");
return NS_ERROR_FAILURE;
}
ANPAudioBuffer buffer;
buffer.channelCount = mTrack->channels;
buffer.format = mTrack->format;
buffer.bufferData = (void*) byte;
while (mTrack->keepGoing)
{
// reset the buffer size
buffer.size = mTrack->bufferSize;
// Get data from the plugin
mTrack->proc(kMoreData_ANPAudioEvent, mTrack->user, &buffer);
if (buffer.size == 0) {
LOG("%p - kMoreData_ANPAudioEvent", mTrack);
continue;
}
size_t wroteSoFar = 0;
jint retval;
do {
retval = jenv->CallIntMethod(mTrack->output_unit,
at.write,
bytearray,
wroteSoFar,
buffer.size - wroteSoFar);
if (retval < 0) {
LOG("%p - Write failed %d", mTrack, retval);
break;
}
wroteSoFar += retval;
} while(wroteSoFar < buffer.size);
}
jenv->CallVoidMethod(mTrack->output_unit, at.release);
jenv->DeleteGlobalRef(mTrack->output_unit);
jenv->DeleteGlobalRef(mTrack->at_class);
free(mTrack);
jenv->ReleaseByteArrayElements(bytearray, byte, 0);
return NS_OK;
}
ANPAudioTrack*
anp_audio_newTrack(uint32_t sampleRate, // sampling rate in Hz
ANPSampleFormat format,
int channelCount, // MONO=1, STEREO=2
ANPAudioCallbackProc proc,
void* user)
{
ANPAudioTrack *s = (ANPAudioTrack*) malloc(sizeof(ANPAudioTrack));
if (s == NULL) {
return NULL;
}
JNIEnv *jenv = GetJNIForThread();
if (!jenv)
return NULL;
s->at_class = init_jni_bindings(jenv);
s->rate = sampleRate;
s->channels = channelCount;
s->bufferSize = s->rate * s->channels;
s->isStopped = true;
s->keepGoing = false;
s->user = user;
s->proc = proc;
s->format = format;
int jformat;
switch (format) {
case kPCM16Bit_ANPSampleFormat:
jformat = ENCODING_PCM_16BIT;
break;
case kPCM8Bit_ANPSampleFormat:
jformat = ENCODING_PCM_8BIT;
break;
default:
LOG("Unknown audio format. defaulting to 16bit.");
jformat = ENCODING_PCM_16BIT;
break;
}
int jChannels;
switch (channelCount) {
case 1:
jChannels = CHANNEL_OUT_MONO;
break;
case 2:
jChannels = CHANNEL_OUT_STEREO;
break;
default:
LOG("Unknown channel count. defaulting to mono.");
jChannels = CHANNEL_OUT_MONO;
break;
}
mozilla::AutoLocalJNIFrame autoFrame(jenv);
jobject obj = jenv->NewObject(s->at_class,
at.constructor,
STREAM_MUSIC,
s->rate,
jChannels,
jformat,
s->bufferSize,
MODE_STREAM);
if (autoFrame.CheckForException() || obj == NULL) {
jenv->DeleteGlobalRef(s->at_class);
free(s);
return NULL;
}
jint state = jenv->CallIntMethod(obj, at.getstate);
if (autoFrame.CheckForException() || state == STATE_UNINITIALIZED) {
jenv->DeleteGlobalRef(s->at_class);
free(s);
return NULL;
}
s->output_unit = jenv->NewGlobalRef(obj);
return s;
}
void
anp_audio_deleteTrack(ANPAudioTrack* s)
{
if (s == NULL) {
return;
}
s->keepGoing = false;
// deallocation happens in the AudioThread. There is a
// potential leak if anp_audio_start is never called, but
// we do not see that from flash.
}
void
anp_audio_start(ANPAudioTrack* s)
{
if (s == NULL || s->output_unit == NULL) {
return;
}
if (s->keepGoing) {
// we are already playing. Ignore.
return;
}
JNIEnv *jenv = GetJNIForThread();
if (!jenv)
return;
mozilla::AutoLocalJNIFrame autoFrame(jenv, 0);
jenv->CallVoidMethod(s->output_unit, at.play);
if (autoFrame.CheckForException()) {
jenv->DeleteGlobalRef(s->at_class);
free(s);
return;
}
s->isStopped = false;
s->keepGoing = true;
// AudioRunnable now owns the ANPAudioTrack
nsRefPtr<AudioRunnable> runnable = new AudioRunnable(s);
nsCOMPtr<nsIThread> thread;
NS_NewThread(getter_AddRefs(thread), runnable);
}
void
anp_audio_pause(ANPAudioTrack* s)
{
if (s == NULL || s->output_unit == NULL) {
return;
}
JNIEnv *jenv = GetJNIForThread();
if (!jenv)
return;
mozilla::AutoLocalJNIFrame autoFrame(jenv, 0);
jenv->CallVoidMethod(s->output_unit, at.pause);
}
void
anp_audio_stop(ANPAudioTrack* s)
{
if (s == NULL || s->output_unit == NULL) {
return;
}
s->isStopped = true;
JNIEnv *jenv = GetJNIForThread();
if (!jenv)
return;
mozilla::AutoLocalJNIFrame autoFrame(jenv, 0);
jenv->CallVoidMethod(s->output_unit, at.stop);
}
bool
anp_audio_isStopped(ANPAudioTrack* s)
{
return s->isStopped;
}
uint32_t
anp_audio_trackLatency(ANPAudioTrack* s) {
// Hardcode an estimate of the system's audio latency. Flash hardcodes
// similar latency estimates for pre-Honeycomb devices that do not support
// ANPAudioTrackInterfaceV1's trackLatency(). The Android stock browser
// calls android::AudioTrack::latency(), an internal Android API that is
// not available in the public NDK:
// https://github.com/android/platform_external_webkit/commit/49bf866973cb3b2a6c74c0eab864e9562e4cbab1
return 100; // milliseconds
}
void InitAudioTrackInterfaceV0(ANPAudioTrackInterfaceV0 *i) {
_assert(i->inSize == sizeof(*i));
ASSIGN(i, newTrack);
ASSIGN(i, deleteTrack);
ASSIGN(i, start);
ASSIGN(i, pause);
ASSIGN(i, stop);
ASSIGN(i, isStopped);
}
void InitAudioTrackInterfaceV1(ANPAudioTrackInterfaceV1 *i) {
_assert(i->inSize == sizeof(*i));
ASSIGN(i, newTrack);
ASSIGN(i, deleteTrack);
ASSIGN(i, start);
ASSIGN(i, pause);
ASSIGN(i, stop);
ASSIGN(i, isStopped);
ASSIGN(i, trackLatency);
}