diff options
Diffstat (limited to 'backends/platform/android/org/inodes/gus/scummvm/ScummVM.java')
-rw-r--r-- | backends/platform/android/org/inodes/gus/scummvm/ScummVM.java | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/backends/platform/android/org/inodes/gus/scummvm/ScummVM.java b/backends/platform/android/org/inodes/gus/scummvm/ScummVM.java new file mode 100644 index 0000000000..f4dca0e7e5 --- /dev/null +++ b/backends/platform/android/org/inodes/gus/scummvm/ScummVM.java @@ -0,0 +1,317 @@ +package org.inodes.gus.scummvm; + +import android.content.Context; +import android.content.res.AssetManager; +import android.media.AudioFormat; +import android.media.AudioManager; +import android.media.AudioTrack; +import android.os.Handler; +import android.os.HandlerThread; +import android.os.Process; +import android.util.Log; +import android.view.Surface; +import android.view.SurfaceHolder; + +import javax.microedition.khronos.egl.EGL10; +import javax.microedition.khronos.egl.EGLConfig; +import javax.microedition.khronos.egl.EGLContext; +import javax.microedition.khronos.egl.EGLDisplay; +import javax.microedition.khronos.egl.EGLSurface; + +import java.io.File; +import java.util.concurrent.Semaphore; + + +// At least in Android 2.1, eglCreateWindowSurface() requires an +// EGLNativeWindowSurface object, which is hidden deep in the bowels +// of libui. Until EGL is properly exposed, it's probably safer to +// use the Java versions of most EGL functions :( + +public class ScummVM implements SurfaceHolder.Callback { + private final static String LOG_TAG = "ScummVM.java"; + + private final int AUDIO_FRAME_SIZE = 2 * 2; // bytes. 16bit audio * stereo + public static class AudioSetupException extends Exception {} + + private long nativeScummVM; // native code hangs itself here + boolean scummVMRunning = false; + + private native void create(AssetManager am); + + public ScummVM(Context context) { + create(context.getAssets()); // Init C++ code, set nativeScummVM + } + + private native void nativeDestroy(); + + public synchronized void destroy() { + if (nativeScummVM != 0) { + nativeDestroy(); + nativeScummVM = 0; + } + } + protected void finalize() { + destroy(); + } + + // Surface creation: + // GUI thread: create surface, release lock + // ScummVM thread: acquire lock (block), read surface + // + // Surface deletion: + // GUI thread: post event, acquire lock (block), return + // ScummVM thread: read event, free surface, release lock + // + // In other words, ScummVM thread does this: + // acquire lock + // setup surface + // when SCREEN_CHANGED arrives: + // destroy surface + // release lock + // back to acquire lock + static final int configSpec[] = { + EGL10.EGL_RED_SIZE, 5, + EGL10.EGL_GREEN_SIZE, 5, + EGL10.EGL_BLUE_SIZE, 5, + EGL10.EGL_DEPTH_SIZE, 0, + EGL10.EGL_SURFACE_TYPE, EGL10.EGL_WINDOW_BIT, + EGL10.EGL_NONE, + }; + EGL10 egl; + EGLDisplay eglDisplay = EGL10.EGL_NO_DISPLAY; + EGLConfig eglConfig; + EGLContext eglContext = EGL10.EGL_NO_CONTEXT; + EGLSurface eglSurface = EGL10.EGL_NO_SURFACE; + Semaphore surfaceLock = new Semaphore(0, true); + SurfaceHolder nativeSurface; + + public void surfaceCreated(SurfaceHolder holder) { + nativeSurface = holder; + surfaceLock.release(); + } + + public void surfaceChanged(SurfaceHolder holder, int format, + int width, int height) { + // Disabled while I debug GL problems + //pushEvent(new Event(Event.EVENT_SCREEN_CHANGED)); + } + + public void surfaceDestroyed(SurfaceHolder holder) { + pushEvent(new Event(Event.EVENT_SCREEN_CHANGED)); + try { + surfaceLock.acquire(); + } catch (InterruptedException e) { + Log.e(this.toString(), + "Interrupted while waiting for surface lock", e); + } + } + + // Called by ScummVM thread (from initBackend) + private void createScummVMGLContext() { + egl = (EGL10)EGLContext.getEGL(); + eglDisplay = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY); + int[] version = new int[2]; + egl.eglInitialize(eglDisplay, version); + int[] num_config = new int[1]; + egl.eglChooseConfig(eglDisplay, configSpec, null, 0, num_config); + + final int numConfigs = num_config[0]; + if (numConfigs <= 0) + throw new IllegalArgumentException("No configs match configSpec"); + + EGLConfig[] configs = new EGLConfig[numConfigs]; + egl.eglChooseConfig(eglDisplay, configSpec, configs, numConfigs, + num_config); + eglConfig = configs[0]; + + eglContext = egl.eglCreateContext(eglDisplay, eglConfig, + EGL10.EGL_NO_CONTEXT, null); + } + + // Called by ScummVM thread + protected void setupScummVMSurface() { + try { + surfaceLock.acquire(); + } catch (InterruptedException e) { + Log.e(this.toString(), + "Interrupted while waiting for surface lock", e); + return; + } + eglSurface = egl.eglCreateWindowSurface(eglDisplay, eglConfig, + nativeSurface, null); + egl.eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext); + } + + // Called by ScummVM thread + protected void destroyScummVMSurface() { + if (eglSurface != null) { + egl.eglMakeCurrent(eglDisplay, EGL10.EGL_NO_SURFACE, + EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_CONTEXT); + egl.eglDestroySurface(eglDisplay, eglSurface); + eglSurface = EGL10.EGL_NO_SURFACE; + } + + surfaceLock.release(); + } + + public void setSurface(SurfaceHolder holder) { + holder.addCallback(this); + } + + // Set scummvm config options + final public native static void loadConfigFile(String path); + final public native static void setConfMan(String key, int value); + final public native static void setConfMan(String key, String value); + + // Feed an event to ScummVM. Safe to call from other threads. + final public native void pushEvent(Event e); + + final private native void audioMixCallback(byte[] buf); + + // Runs the actual ScummVM program and returns when it does. + // This should not be called from multiple threads simultaneously... + final public native int scummVMMain(String[] argv); + + // Callbacks from C++ peer instance + //protected GraphicsMode[] getSupportedGraphicsModes() {} + protected void displayMessageOnOSD(String msg) {} + protected void setWindowCaption(String caption) {} + protected void showVirtualKeyboard(boolean enable) {} + protected String[] getSysArchives() { return new String[0]; } + protected String[] getPluginDirectories() { return new String[0]; } + protected void initBackend() throws AudioSetupException { + createScummVMGLContext(); + initAudio(); + } + + private static class AudioThread extends Thread { + final private int buf_size; + private boolean is_paused = false; + final private ScummVM scummvm; + final private AudioTrack audio_track; + + AudioThread(ScummVM scummvm, AudioTrack audio_track, int buf_size) { + super("AudioThread"); + this.scummvm = scummvm; + this.audio_track = audio_track; + this.buf_size = buf_size; + setPriority(Thread.MAX_PRIORITY); + setDaemon(true); + } + + public void pauseAudio() { + synchronized (this) { + is_paused = true; + } + audio_track.pause(); + } + + public void resumeAudio() { + synchronized (this) { + is_paused = false; + notifyAll(); + } + audio_track.play(); + } + + public void run() { + byte[] buf = new byte[buf_size]; + audio_track.play(); + int offset = 0; + try { + while (true) { + synchronized (this) { + while (is_paused) + wait(); + } + + if (offset == buf.length) { + // Grab new audio data + scummvm.audioMixCallback(buf); + offset = 0; + } + int len = buf.length - offset; + int ret = audio_track.write(buf, offset, len); + if (ret < 0) { + Log.w(LOG_TAG, String.format( + "AudioTrack.write(%dB) returned error %d", + buf.length, ret)); + break; + } else if (ret != len) { + Log.w(LOG_TAG, String.format( + "Short audio write. Wrote %dB, not %dB", + ret, buf.length)); + // Buffer is full, so yield cpu for a while + Thread.sleep(100); + } + offset += ret; + } + } catch (InterruptedException e) { + Log.e(this.toString(), "Audio thread interrupted", e); + } + } + } + private AudioThread audio_thread; + + final public int audioSampleRate() { + return AudioTrack.getNativeOutputSampleRate(AudioManager.STREAM_MUSIC); + } + + private void initAudio() throws AudioSetupException { + int sample_rate = audioSampleRate(); + int buf_size = + AudioTrack.getMinBufferSize(sample_rate, + AudioFormat.CHANNEL_CONFIGURATION_STEREO, + AudioFormat.ENCODING_PCM_16BIT); + if (buf_size < 0) { + int guess = AUDIO_FRAME_SIZE * sample_rate / 100; // 10ms of audio + Log.w(LOG_TAG, String.format( + "Unable to get min audio buffer size (error %d). Guessing %dB.", + buf_size, guess)); + buf_size = guess; + } + Log.d(LOG_TAG, String.format("Using %dB buffer for %dHZ audio", + buf_size, sample_rate)); + AudioTrack audio_track = + new AudioTrack(AudioManager.STREAM_MUSIC, + sample_rate, + AudioFormat.CHANNEL_CONFIGURATION_STEREO, + AudioFormat.ENCODING_PCM_16BIT, + buf_size, + AudioTrack.MODE_STREAM); + if (audio_track.getState() != AudioTrack.STATE_INITIALIZED) { + Log.e(LOG_TAG, "Error initialising Android audio system."); + throw new AudioSetupException(); + } + + audio_thread = new AudioThread(this, audio_track, buf_size); + audio_thread.start(); + } + + public void pause() { + audio_thread.pauseAudio(); + // TODO: need to pause engine too + } + + public void resume() { + // TODO: need to resume engine too + audio_thread.resumeAudio(); + } + + static { + // For grabbing with gdb... + final boolean sleep_for_debugger = false; + if (sleep_for_debugger) { + try { + Thread.sleep(20*1000); + } catch (InterruptedException e) { + } + } + + //System.loadLibrary("scummvm"); + File cache_dir = ScummVMApplication.getLastCacheDir(); + String libname = System.mapLibraryName("scummvm"); + File libpath = new File(cache_dir, libname); + System.load(libpath.getPath()); + } +} |