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 TEST_TESTSUPPORT_FRAME_WRITER_H_ 12 #define TEST_TESTSUPPORT_FRAME_WRITER_H_ 13 14 #include <stdio.h> 15 16 #include <string> 17 18 #include "api/video/video_frame.h" 19 20 namespace webrtc { 21 namespace test { 22 23 // Handles writing of video files. 24 class FrameWriter { 25 public: ~FrameWriter()26 virtual ~FrameWriter() {} 27 28 // Initializes the file handler, i.e. opens the input and output files etc. 29 // This must be called before reading or writing frames has started. 30 // Returns false if an error has occurred, in addition to printing to stderr. 31 virtual bool Init() = 0; 32 33 // Writes a frame of the configured frame length to the output file. 34 // Returns true if the write was successful, false otherwise. 35 virtual bool WriteFrame(uint8_t* frame_buffer) = 0; 36 37 // Closes the output file if open. Essentially makes this class impossible 38 // to use anymore. Will also be invoked by the destructor. 39 virtual void Close() = 0; 40 41 // Frame length in bytes of a single frame image. 42 virtual size_t FrameLength() = 0; 43 }; 44 45 // Writes raw I420 frames in sequence. 46 class YuvFrameWriterImpl : public FrameWriter { 47 public: 48 // Creates a file handler. The input file is assumed to exist and be readable 49 // and the output file must be writable. 50 // Parameters: 51 // output_filename The file to write. Will be overwritten if already 52 // existing. 53 // width, height Size of each frame to read. 54 YuvFrameWriterImpl(std::string output_filename, int width, int height); 55 ~YuvFrameWriterImpl() override; 56 bool Init() override; 57 bool WriteFrame(uint8_t* frame_buffer) override; 58 void Close() override; 59 size_t FrameLength() override; 60 61 protected: 62 const std::string output_filename_; 63 size_t frame_length_in_bytes_; 64 const int width_; 65 const int height_; 66 FILE* output_file_; 67 }; 68 69 // Writes raw I420 frames in sequence, but with Y4M file and frame headers for 70 // more convenient playback in external media players. 71 class Y4mFrameWriterImpl : public YuvFrameWriterImpl { 72 public: 73 Y4mFrameWriterImpl(std::string output_filename, 74 int width, 75 int height, 76 int frame_rate); 77 ~Y4mFrameWriterImpl() override; 78 bool Init() override; 79 bool WriteFrame(uint8_t* frame_buffer) override; 80 81 private: 82 const int frame_rate_; 83 }; 84 85 // LibJpeg is not available on iOS. This class will do nothing on iOS. 86 class JpegFrameWriter { 87 public: 88 JpegFrameWriter(const std::string& output_filename); 89 // Quality can be from 0 (worst) to 100 (best). Best quality is still lossy. 90 // WriteFrame can be called only once. Subsequent calls will fail. 91 bool WriteFrame(const VideoFrame& input_frame, int quality); 92 93 #if !defined(WEBRTC_IOS) 94 private: 95 bool frame_written_; 96 const std::string output_filename_; 97 FILE* output_file_; 98 #endif 99 }; 100 101 } // namespace test 102 } // namespace webrtc 103 104 #endif // TEST_TESTSUPPORT_FRAME_WRITER_H_ 105