content: /*
   * Copyright (C) 2011-2014 GUIGUI Simon, fyhertz@gmail.com
   * 
   * This file is part of Spydroid (http://code.google.com/p/spydroid-ipcamera/)
   * 
   * Spydroid is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 3 of the License, or
   * (at your option) any later version.
   * 
   * This source code is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   * 
   * You should have received a copy of the GNU General Public License
   * along with this source code; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package net.majorkernelpanic.streaming.hw;
  
  import java.util.ArrayList;
  import java.util.HashSet;
  import java.util.Set;
  
  import android.annotation.SuppressLint;
  import android.media.MediaCodecInfo;
  import android.media.MediaCodecList;
  import android.util.Log;
  
  @SuppressLint("InlinedApi")
  public class CodecManager {
  
  	public final static String TAG = "CodecManager";
  
  	public static final int[] SUPPORTED_COLOR_FORMATS = {
  		MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420SemiPlanar,
  		MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420PackedSemiPlanar,
  		MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar,
  		MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420PackedPlanar,
  		MediaCodecInfo.CodecCapabilities.COLOR_TI_FormatYUV420PackedSemiPlanar
  	};		
  
  	private static Codec[] sEncoders = null;
  	private static Codec[] sDecoders = null;
  
  	static class Codec {
  		public Codec(String name, Integer[] formats) {
  			this.name = name;
  			this.formats = formats;
  		}
  		public String name;
  		public Integer[] formats;
  	}
  
  	/**
  	 * Lists all encoders that claim to support a color format that we know how to use.
  	 * @return A list of those encoders
  	 */
  	@SuppressLint("NewApi")
  	public synchronized static Codec[] findEncodersForMimeType(String mimeType) {
  		if (sEncoders != null) return sEncoders;
  
  		ArrayList<Codec> encoders = new ArrayList<Codec>();
  
  		// We loop through the encoders, apparently this can take up to a sec (testes on a GS3)
  		for(int j = MediaCodecList.getCodecCount() - 1; j >= 0; j--){
  			MediaCodecInfo codecInfo = MediaCodecList.getCodecInfoAt(j);
  			if (!codecInfo.isEncoder()) continue;
  
  			String[] types = codecInfo.getSupportedTypes();
  			for (int i = 0; i < types.length; i++) {
  				if (types[i].equalsIgnoreCase(mimeType)) {
  					try {
  						MediaCodecInfo.CodecCapabilities capabilities = codecInfo.getCapabilitiesForType(mimeType);
  						Set<Integer> formats = new HashSet<Integer>();
  
  						// And through the color formats supported
  						for (int k = 0; k < capabilities.colorFormats.length; k++) {
  							int format = capabilities.colorFormats[k];
  
  							for (int l=0;l<SUPPORTED_COLOR_FORMATS.length;l++) {
  								if (format == SUPPORTED_COLOR_FORMATS[l]) {
  									formats.add(format);
  								}
  							}
  						}
  						
  						Codec codec = new Codec(codecInfo.getName(), (Integer[]) formats.toArray(new Integer[formats.size()]));
  						encoders.add(codec);
  					} catch (Exception e) {
  						Log.wtf(TAG,e);
  					}
  				}
  			}
  		}
  
  		sEncoders = (Codec[]) encoders.toArray(new Codec[encoders.size()]);
  		return sEncoders;
  
  	}
  
  	/**
  	 * Lists all decoders that claim to support a color format that we know how to use.
  	 * @return A list of those decoders
  	 */
  	@SuppressLint("NewApi")
  	public synchronized static Codec[] findDecodersForMimeType(String mimeType) {
  		if (sDecoders != null) return sDecoders;
  		ArrayList<Codec> decoders = new ArrayList<Codec>();
  
  		// We loop through the decoders, apparently this can take up to a sec (testes on a GS3)
  		for(int j = MediaCodecList.getCodecCount() - 1; j >= 0; j--){
  			MediaCodecInfo codecInfo = MediaCodecList.getCodecInfoAt(j);
  			if (codecInfo.isEncoder()) continue;
  
  			String[] types = codecInfo.getSupportedTypes();
  			for (int i = 0; i < types.length; i++) {
  				if (types[i].equalsIgnoreCase(mimeType)) {
  					try {
  						MediaCodecInfo.CodecCapabilities capabilities = codecInfo.getCapabilitiesForType(mimeType);
  						Set<Integer> formats = new HashSet<Integer>();
  
  						// And through the color formats supported
  						for (int k = 0; k < capabilities.colorFormats.length; k++) {
  							int format = capabilities.colorFormats[k];
  
  							for (int l=0;l<SUPPORTED_COLOR_FORMATS.length;l++) {
  								if (format == SUPPORTED_COLOR_FORMATS[l]) {
  									formats.add(format);
  								}
  							}
  						}
  
  						Codec codec = new Codec(codecInfo.getName(), (Integer[]) formats.toArray(new Integer[formats.size()]));
  						decoders.add(codec);
  					} catch (Exception e) {
  						Log.wtf(TAG,e);
  					}
  				}
  			}
  		}
  
  		sDecoders = (Codec[]) decoders.toArray(new Codec[decoders.size()]);
  
  		// We will use the decoder from google first, it seems to work properly on many phones
  		for (int i=0;i<sDecoders.length;i++) {
  			if (sDecoders[i].name.equalsIgnoreCase("omx.google.h264.decoder")) {
  				Codec codec = sDecoders[0];
  				sDecoders[0] = sDecoders[i];
  				sDecoders[i] = codec;
  			} 
  		}
  
  		return sDecoders;
  	}
  
  }
  
  