1 /* 2 * Copyright (c) 2012 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 #ifndef WEBRTC_MODULES_VIDEO_CODING_CODECS_I420_MAIN_INTERFACE_I420_H_ 12 #define WEBRTC_MODULES_VIDEO_CODING_CODECS_I420_MAIN_INTERFACE_I420_H_ 13 14 #include <vector> 15 16 #include "webrtc/modules/video_coding/codecs/interface/video_codec_interface.h" 17 #include "webrtc/typedefs.h" 18 19 namespace webrtc { 20 21 enum { kI420HeaderSize = 4 }; 22 23 class I420Encoder : public VideoEncoder { 24 public: 25 I420Encoder(); 26 27 virtual ~I420Encoder(); 28 29 // Initialize the encoder with the information from the VideoCodec. 30 // 31 // Input: 32 // - codecSettings : Codec settings. 33 // - numberOfCores : Number of cores available for the encoder. 34 // - maxPayloadSize : The maximum size each payload is allowed 35 // to have. Usually MTU - overhead. 36 // 37 // Return value : WEBRTC_VIDEO_CODEC_OK if OK. 38 // <0 - Error 39 virtual int InitEncode(const VideoCodec* codecSettings, 40 int /*numberOfCores*/, 41 uint32_t /*maxPayloadSize*/) OVERRIDE; 42 43 // "Encode" an I420 image (as a part of a video stream). The encoded image 44 // will be returned to the user via the encode complete callback. 45 // 46 // Input: 47 // - inputImage : Image to be encoded. 48 // - codecSpecificInfo : Pointer to codec specific data. 49 // - frameType : Frame type to be sent (Key /Delta). 50 // 51 // Return value : WEBRTC_VIDEO_CODEC_OK if OK. 52 // <0 - Error 53 virtual int Encode( 54 const I420VideoFrame& inputImage, 55 const CodecSpecificInfo* /*codecSpecificInfo*/, 56 const std::vector<VideoFrameType>* /*frame_types*/) OVERRIDE; 57 58 // Register an encode complete callback object. 59 // 60 // Input: 61 // - callback : Callback object which handles encoded images. 62 // 63 // Return value : WEBRTC_VIDEO_CODEC_OK if OK, < 0 otherwise. 64 virtual int RegisterEncodeCompleteCallback( 65 EncodedImageCallback* callback) OVERRIDE; 66 67 // Free encoder memory. 68 // 69 // Return value : WEBRTC_VIDEO_CODEC_OK if OK, < 0 otherwise. 70 virtual int Release() OVERRIDE; 71 72 virtual int SetRates(uint32_t /*newBitRate*/, 73 uint32_t /*frameRate*/) OVERRIDE { 74 return WEBRTC_VIDEO_CODEC_OK; 75 } 76 77 virtual int SetChannelParameters(uint32_t /*packetLoss*/, 78 int /*rtt*/) OVERRIDE { 79 return WEBRTC_VIDEO_CODEC_OK; 80 } 81 82 virtual int CodecConfigParameters(uint8_t* /*buffer*/, 83 int /*size*/) OVERRIDE { 84 return WEBRTC_VIDEO_CODEC_OK; 85 } 86 87 private: 88 static uint8_t* InsertHeader(uint8_t* buffer, uint16_t width, 89 uint16_t height); 90 91 bool _inited; 92 EncodedImage _encodedImage; 93 EncodedImageCallback* _encodedCompleteCallback; 94 }; // class I420Encoder 95 96 class I420Decoder : public VideoDecoder { 97 public: 98 I420Decoder(); 99 100 virtual ~I420Decoder(); 101 102 // Initialize the decoder. 103 // The user must notify the codec of width and height values. 104 // 105 // Return value : WEBRTC_VIDEO_CODEC_OK. 106 // <0 - Errors 107 virtual int InitDecode(const VideoCodec* codecSettings, 108 int /*numberOfCores*/) OVERRIDE; 109 110 virtual int SetCodecConfigParameters(const uint8_t* /*buffer*/, 111 int /*size*/) OVERRIDE { 112 return WEBRTC_VIDEO_CODEC_OK; 113 } 114 115 // Decode encoded image (as a part of a video stream). The decoded image 116 // will be returned to the user through the decode complete callback. 117 // 118 // Input: 119 // - inputImage : Encoded image to be decoded 120 // - missingFrames : True if one or more frames have been lost 121 // since the previous decode call. 122 // - codecSpecificInfo : pointer to specific codec data 123 // - renderTimeMs : Render time in Ms 124 // 125 // Return value : WEBRTC_VIDEO_CODEC_OK if OK 126 // <0 - Error 127 virtual int Decode(const EncodedImage& inputImage, 128 bool missingFrames, 129 const RTPFragmentationHeader* /*fragmentation*/, 130 const CodecSpecificInfo* /*codecSpecificInfo*/, 131 int64_t /*renderTimeMs*/) OVERRIDE; 132 133 // Register a decode complete callback object. 134 // 135 // Input: 136 // - callback : Callback object which handles decoded images. 137 // 138 // Return value : WEBRTC_VIDEO_CODEC_OK if OK, < 0 otherwise. 139 virtual int RegisterDecodeCompleteCallback( 140 DecodedImageCallback* callback) OVERRIDE; 141 142 // Free decoder memory. 143 // 144 // Return value : WEBRTC_VIDEO_CODEC_OK if OK. 145 // <0 - Error 146 virtual int Release() OVERRIDE; 147 148 // Reset decoder state and prepare for a new call. 149 // 150 // Return value : WEBRTC_VIDEO_CODEC_OK. 151 // <0 - Error 152 virtual int Reset() OVERRIDE; 153 154 private: 155 static const uint8_t* ExtractHeader(const uint8_t* buffer, 156 uint16_t* width, 157 uint16_t* height); 158 159 I420VideoFrame _decodedImage; 160 int _width; 161 int _height; 162 bool _inited; 163 DecodedImageCallback* _decodeCompleteCallback; 164 }; // class I420Decoder 165 166 } // namespace webrtc 167 168 #endif // WEBRTC_MODULES_VIDEO_CODING_CODECS_I420_MAIN_INTERFACE_I420_H_ 169
