1 /* 2 * Copyright 2017 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 package org.webrtc; 12 13 import java.util.Map; 14 import java.util.HashMap; 15 16 /** Container for static helper functions related to dealing with H264 codecs. */ 17 class H264Utils { 18 public static final String H264_FMTP_PROFILE_LEVEL_ID = "profile-level-id"; 19 public static final String H264_FMTP_LEVEL_ASYMMETRY_ALLOWED = "level-asymmetry-allowed"; 20 public static final String H264_FMTP_PACKETIZATION_MODE = "packetization-mode"; 21 22 public static final String H264_PROFILE_CONSTRAINED_BASELINE = "42e0"; 23 public static final String H264_PROFILE_CONSTRAINED_HIGH = "640c"; 24 public static final String H264_LEVEL_3_1 = "1f"; // 31 in hex. 25 public static final String H264_CONSTRAINED_HIGH_3_1 = 26 H264_PROFILE_CONSTRAINED_HIGH + H264_LEVEL_3_1; 27 public static final String H264_CONSTRAINED_BASELINE_3_1 = 28 H264_PROFILE_CONSTRAINED_BASELINE + H264_LEVEL_3_1; 29 getDefaultH264Params(boolean isHighProfile)30 public static Map<String, String> getDefaultH264Params(boolean isHighProfile) { 31 final Map<String, String> params = new HashMap<>(); 32 params.put(VideoCodecInfo.H264_FMTP_LEVEL_ASYMMETRY_ALLOWED, "1"); 33 params.put(VideoCodecInfo.H264_FMTP_PACKETIZATION_MODE, "1"); 34 params.put(VideoCodecInfo.H264_FMTP_PROFILE_LEVEL_ID, 35 isHighProfile ? VideoCodecInfo.H264_CONSTRAINED_HIGH_3_1 36 : VideoCodecInfo.H264_CONSTRAINED_BASELINE_3_1); 37 return params; 38 } 39 40 public static VideoCodecInfo DEFAULT_H264_BASELINE_PROFILE_CODEC = 41 new VideoCodecInfo("H264", getDefaultH264Params(/* isHighProfile= */ false)); 42 public static VideoCodecInfo DEFAULT_H264_HIGH_PROFILE_CODEC = 43 new VideoCodecInfo("H264", getDefaultH264Params(/* isHighProfile= */ true)); 44 isSameH264Profile( Map<String, String> params1, Map<String, String> params2)45 public static boolean isSameH264Profile( 46 Map<String, String> params1, Map<String, String> params2) { 47 return nativeIsSameH264Profile(params1, params2); 48 } 49 nativeIsSameH264Profile( Map<String, String> params1, Map<String, String> params2)50 private static native boolean nativeIsSameH264Profile( 51 Map<String, String> params1, Map<String, String> params2); 52 } 53