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@addtogroup cudacodec 63 //! @{ 64 65 ////////////////////////////////// Video Encoding ////////////////////////////////// 66 67 // Works only under Windows. 68 // Supports olny H264 video codec and AVI files. 69 70 enum SurfaceFormat 71 { 72 SF_UYVY = 0, 73 SF_YUY2, 74 SF_YV12, 75 SF_NV12, 76 SF_IYUV, 77 SF_BGR, 78 SF_GRAY = SF_BGR 79 }; 80 81 /** @brief Different parameters for CUDA video encoder. 82 */ 83 struct CV_EXPORTS EncoderParams 84 { 85 int P_Interval; //!< NVVE_P_INTERVAL, 86 int IDR_Period; //!< NVVE_IDR_PERIOD, 87 int DynamicGOP; //!< NVVE_DYNAMIC_GOP, 88 int RCType; //!< NVVE_RC_TYPE, 89 int AvgBitrate; //!< NVVE_AVG_BITRATE, 90 int PeakBitrate; //!< NVVE_PEAK_BITRATE, 91 int QP_Level_Intra; //!< NVVE_QP_LEVEL_INTRA, 92 int QP_Level_InterP; //!< NVVE_QP_LEVEL_INTER_P, 93 int QP_Level_InterB; //!< NVVE_QP_LEVEL_INTER_B, 94 int DeblockMode; //!< NVVE_DEBLOCK_MODE, 95 int ProfileLevel; //!< NVVE_PROFILE_LEVEL, 96 int ForceIntra; //!< NVVE_FORCE_INTRA, 97 int ForceIDR; //!< NVVE_FORCE_IDR, 98 int ClearStat; //!< NVVE_CLEAR_STAT, 99 int DIMode; //!< NVVE_SET_DEINTERLACE, 100 int Presets; //!< NVVE_PRESETS, 101 int DisableCabac; //!< NVVE_DISABLE_CABAC, 102 int NaluFramingType; //!< NVVE_CONFIGURE_NALU_FRAMING_TYPE 103 int DisableSPSPPS; //!< NVVE_DISABLE_SPS_PPS 104 105 EncoderParams(); 106 /** @brief Constructors. 107 108 @param configFile Config file name. 109 110 Creates default parameters or reads parameters from config file. 111 */ 112 explicit EncoderParams(const String& configFile); 113 114 /** @brief Reads parameters from config file. 115 116 @param configFile Config file name. 117 */ 118 void load(const String& configFile); 119 /** @brief Saves parameters to config file. 120 121 @param configFile Config file name. 122 */ 123 void save(const String& configFile) const; 124 }; 125 126 /** @brief Callbacks for CUDA video encoder. 127 */ 128 class CV_EXPORTS EncoderCallBack 129 { 130 public: 131 enum PicType 132 { 133 IFRAME = 1, 134 PFRAME = 2, 135 BFRAME = 3 136 }; 137 138 virtual ~EncoderCallBack() {} 139 140 /** @brief Callback function to signal the start of bitstream that is to be encoded. 141 142 Callback must allocate buffer for CUDA encoder and return pointer to it and it's size. 143 */ 144 virtual uchar* acquireBitStream(int* bufferSize) = 0; 145 146 /** @brief Callback function to signal that the encoded bitstream is ready to be written to file. 147 */ 148 virtual void releaseBitStream(unsigned char* data, int size) = 0; 149 150 /** @brief Callback function to signal that the encoding operation on the frame has started. 151 152 @param frameNumber 153 @param picType Specify frame type (I-Frame, P-Frame or B-Frame). 154 */ 155 virtual void onBeginFrame(int frameNumber, PicType picType) = 0; 156 157 /** @brief Callback function signals that the encoding operation on the frame has finished. 158 159 @param frameNumber 160 @param picType Specify frame type (I-Frame, P-Frame or B-Frame). 161 */ 162 virtual void onEndFrame(int frameNumber, PicType picType) = 0; 163 }; 164 165 /** @brief Video writer interface. 166 167 The implementation uses H264 video codec. 168 169 @note Currently only Windows platform is supported. 170 171 @note 172 - An example on how to use the videoWriter class can be found at 173 opencv_source_code/samples/gpu/video_writer.cpp 174 */ 175 class CV_EXPORTS VideoWriter 176 { 177 public: 178 virtual ~VideoWriter() {} 179 180 /** @brief Writes the next video frame. 181 182 @param frame The written frame. 183 @param lastFrame Indicates that it is end of stream. The parameter can be ignored. 184 185 The method write the specified image to video file. The image must have the same size and the same 186 surface format as has been specified when opening the video writer. 187 */ 188 virtual void write(InputArray frame, bool lastFrame = false) = 0; 189 190 virtual EncoderParams getEncoderParams() const = 0; 191 }; 192 193 /** @brief Creates video writer. 194 195 @param fileName Name of the output video file. Only AVI file format is supported. 196 @param frameSize Size of the input video frames. 197 @param fps Framerate of the created video stream. 198 @param format Surface format of input frames ( SF_UYVY , SF_YUY2 , SF_YV12 , SF_NV12 , 199 SF_IYUV , SF_BGR or SF_GRAY). BGR or gray frames will be converted to YV12 format before 200 encoding, frames with other formats will be used as is. 201 202 The constructors initialize video writer. FFMPEG is used to write videos. User can implement own 203 multiplexing with cudacodec::EncoderCallBack . 204 */ 205 CV_EXPORTS Ptr<VideoWriter> createVideoWriter(const String& fileName, Size frameSize, double fps, SurfaceFormat format = SF_BGR); 206 /** @overload 207 @param fileName Name of the output video file. Only AVI file format is supported. 208 @param frameSize Size of the input video frames. 209 @param fps Framerate of the created video stream. 210 @param params Encoder parameters. See cudacodec::EncoderParams . 211 @param format Surface format of input frames ( SF_UYVY , SF_YUY2 , SF_YV12 , SF_NV12 , 212 SF_IYUV , SF_BGR or SF_GRAY). BGR or gray frames will be converted to YV12 format before 213 encoding, frames with other formats will be used as is. 214 */ 215 CV_EXPORTS Ptr<VideoWriter> createVideoWriter(const String& fileName, Size frameSize, double fps, const EncoderParams& params, SurfaceFormat format = SF_BGR); 216 217 /** @overload 218 @param encoderCallback Callbacks for video encoder. See cudacodec::EncoderCallBack . Use it if you 219 want to work with raw video stream. 220 @param frameSize Size of the input video frames. 221 @param fps Framerate of the created video stream. 222 @param format Surface format of input frames ( SF_UYVY , SF_YUY2 , SF_YV12 , SF_NV12 , 223 SF_IYUV , SF_BGR or SF_GRAY). BGR or gray frames will be converted to YV12 format before 224 encoding, frames with other formats will be used as is. 225 */ 226 CV_EXPORTS Ptr<VideoWriter> createVideoWriter(const Ptr<EncoderCallBack>& encoderCallback, Size frameSize, double fps, SurfaceFormat format = SF_BGR); 227 /** @overload 228 @param encoderCallback Callbacks for video encoder. See cudacodec::EncoderCallBack . Use it if you 229 want to work with raw video stream. 230 @param frameSize Size of the input video frames. 231 @param fps Framerate of the created video stream. 232 @param params Encoder parameters. See cudacodec::EncoderParams . 233 @param format Surface format of input frames ( SF_UYVY , SF_YUY2 , SF_YV12 , SF_NV12 , 234 SF_IYUV , SF_BGR or SF_GRAY). BGR or gray frames will be converted to YV12 format before 235 encoding, frames with other formats will be used as is. 236 */ 237 CV_EXPORTS Ptr<VideoWriter> createVideoWriter(const Ptr<EncoderCallBack>& encoderCallback, Size frameSize, double fps, const EncoderParams& params, SurfaceFormat format = SF_BGR); 238 239 ////////////////////////////////// Video Decoding ////////////////////////////////////////// 240 241 /** @brief Video codecs supported by cudacodec::VideoReader . 242 */ 243 enum Codec 244 { 245 MPEG1 = 0, 246 MPEG2, 247 MPEG4, 248 VC1, 249 H264, 250 JPEG, 251 H264_SVC, 252 H264_MVC, 253 254 Uncompressed_YUV420 = (('I'<<24)|('Y'<<16)|('U'<<8)|('V')), //!< Y,U,V (4:2:0) 255 Uncompressed_YV12 = (('Y'<<24)|('V'<<16)|('1'<<8)|('2')), //!< Y,V,U (4:2:0) 256 Uncompressed_NV12 = (('N'<<24)|('V'<<16)|('1'<<8)|('2')), //!< Y,UV (4:2:0) 257 Uncompressed_YUYV = (('Y'<<24)|('U'<<16)|('Y'<<8)|('V')), //!< YUYV/YUY2 (4:2:2) 258 Uncompressed_UYVY = (('U'<<24)|('Y'<<16)|('V'<<8)|('Y')) //!< UYVY (4:2:2) 259 }; 260 261 /** @brief Chroma formats supported by cudacodec::VideoReader . 262 */ 263 enum ChromaFormat 264 { 265 Monochrome = 0, 266 YUV420, 267 YUV422, 268 YUV444 269 }; 270 271 /** @brief Struct providing information about video file format. : 272 */ 273 struct FormatInfo 274 { 275 Codec codec; 276 ChromaFormat chromaFormat; 277 int width; 278 int height; 279 }; 280 281 /** @brief Video reader interface. 282 283 @note 284 - An example on how to use the videoReader class can be found at 285 opencv_source_code/samples/gpu/video_reader.cpp 286 */ 287 class CV_EXPORTS VideoReader 288 { 289 public: 290 virtual ~VideoReader() {} 291 292 /** @brief Grabs, decodes and returns the next video frame. 293 294 If no frames has been grabbed (there are no more frames in video file), the methods return false . 295 The method throws Exception if error occurs. 296 */ 297 virtual bool nextFrame(OutputArray frame) = 0; 298 299 /** @brief Returns information about video file format. 300 */ 301 virtual FormatInfo format() const = 0; 302 }; 303 304 /** @brief Interface for video demultiplexing. : 305 306 User can implement own demultiplexing by implementing this interface. 307 */ 308 class CV_EXPORTS RawVideoSource 309 { 310 public: 311 virtual ~RawVideoSource() {} 312 313 /** @brief Returns next packet with RAW video frame. 314 315 @param data Pointer to frame data. 316 @param size Size in bytes of current frame. 317 @param endOfFile Indicates that it is end of stream. 318 */ 319 virtual bool getNextPacket(unsigned char** data, int* size, bool* endOfFile) = 0; 320 321 /** @brief Returns information about video file format. 322 */ 323 virtual FormatInfo format() const = 0; 324 }; 325 326 /** @brief Creates video reader. 327 328 @param filename Name of the input video file. 329 330 FFMPEG is used to read videos. User can implement own demultiplexing with cudacodec::RawVideoSource 331 */ 332 CV_EXPORTS Ptr<VideoReader> createVideoReader(const String& filename); 333 /** @overload 334 @param source RAW video source implemented by user. 335 */ 336 CV_EXPORTS Ptr<VideoReader> createVideoReader(const Ptr<RawVideoSource>& source); 337 338 //! @} 339 340 }} // namespace cv { namespace cudacodec { 341 342 #endif /* __OPENCV_CUDACODEC_HPP__ */ 343
