Mercurial > repos > blastem
diff android/src/org/libsdl/app/SDLAudioManager.java @ 1839:78abbabfd58d
Get Android build working again and update for SDL 2.0.7 (last version to support older versions of Android)
author | Michael Pavone <pavone@retrodev.com> |
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date | Sun, 14 Apr 2019 23:37:11 -0700 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/android/src/org/libsdl/app/SDLAudioManager.java Sun Apr 14 23:37:11 2019 -0700 @@ -0,0 +1,178 @@ +package org.libsdl.app; + +import android.media.*; +import android.util.Log; + +public class SDLAudioManager +{ + protected static final String TAG = "SDLAudio"; + + protected static AudioTrack mAudioTrack; + protected static AudioRecord mAudioRecord; + + public static void initialize() { + mAudioTrack = null; + mAudioRecord = null; + } + + // Audio + + /** + * This method is called by SDL using JNI. + */ + public static int audioOpen(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 audio: 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, (AudioTrack.getMinBufferSize(sampleRate, channelConfig, audioFormat) + frameSize - 1) / frameSize); + + if (mAudioTrack == null) { + 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(TAG, "Failed during initialization of Audio Track"); + mAudioTrack = null; + return -1; + } + + mAudioTrack.play(); + } + + Log.v(TAG, "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; + } + + /** + * This method is called by SDL using JNI. + */ + public static void audioWriteShortBuffer(short[] buffer) { + if (mAudioTrack == null) { + Log.e(TAG, "Attempted to make audio call with uninitialized audio!"); + return; + } + + for (int i = 0; i < buffer.length; ) { + int result = mAudioTrack.write(buffer, i, buffer.length - i); + if (result > 0) { + i += result; + } else if (result == 0) { + try { + Thread.sleep(1); + } catch(InterruptedException e) { + // Nom nom + } + } else { + Log.w(TAG, "SDL audio: error return from write(short)"); + return; + } + } + } + + /** + * This method is called by SDL using JNI. + */ + public static void audioWriteByteBuffer(byte[] buffer) { + if (mAudioTrack == null) { + Log.e(TAG, "Attempted to make audio call with uninitialized audio!"); + return; + } + + for (int i = 0; i < buffer.length; ) { + int result = mAudioTrack.write(buffer, i, buffer.length - i); + if (result > 0) { + i += result; + } else if (result == 0) { + try { + Thread.sleep(1); + } catch(InterruptedException e) { + // Nom nom + } + } else { + Log.w(TAG, "SDL audio: error return from write(byte)"); + return; + } + } + } + + /** + * This method is called by SDL using JNI. + */ + 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) { + mAudioTrack.stop(); + mAudioTrack.release(); + mAudioTrack = null; + } + } + + /** This method is called by SDL using JNI. */ + public static void captureClose() { + if (mAudioRecord != null) { + mAudioRecord.stop(); + mAudioRecord.release(); + mAudioRecord = null; + } + } + + public static native int nativeSetupJNI(); +}