private boolean mix(short[] outBuffer, int bufferSize) {
List<AudioOutputSpeech> mix = new ArrayList<AudioOutputSpeech>();
List<AudioOutputSpeech> del = new ArrayList<AudioOutputSpeech>();
// TODO add priority speaker support
for (AudioOutputSpeech speech : mAudioOutputs.values()) {
if (!speech.needSamples(bufferSize)) del.add(speech);
else mix.add(speech);
}
if (!mix.isEmpty()) {
for (AudioOutputSpeech speech : mix) {
float[] buffer = speech.getBuffer();
for (int i = 0; i < bufferSize; i++) {
short pcm = (short) (buffer[i] * Short.MAX_VALUE); // Convert float to short
pcm = (short) Math.max(Math.min(pcm, Short.MAX_VALUE), Short.MIN_VALUE); // Clip audio
outBuffer[i] += pcm;
}
}
}
for (AudioOutputSpeech speech : del) mAudioOutputs.remove(speech.getSession());
return !mix.isEmpty();
}
