/* *  Copyright (c) 2012 The WebM project authors. All Rights Reserved. * *  Use of this source code is governed by a BSD-style license *  that can be found in the LICENSE file in the root of the source *  tree. An additional intellectual property rights grant can be found *  in the file PATENTS.  All contributing project authors may *  be found in the AUTHORS file in the root of the source tree. */#ifndef VPX_TEST_IVF_VIDEO_SOURCE_H_#define VPX_TEST_IVF_VIDEO_SOURCE_H_#include <cstdio>#include <cstdlib>#include <new>#include <string>#include "test/video_source.h" namespace libvpx_test {const unsigned int kCodeBufferSize = 256 * 1024 * 1024;const unsigned int kIvfFileHdrSize = 32;const unsigned int kIvfFrameHdrSize = 12; static unsigned int MemGetLe32(const uint8_t *mem) {  return (mem[3] << 24) | (mem[2] << 16) | (mem[1] << 8) | (mem[0]);} // This class extends VideoSource to allow parsing of ivf files,// so that we can do actual file decodes.class IVFVideoSource : public CompressedVideoSource { public:  explicit IVFVideoSource(const std::string &file_name)      : file_name_(file_name), input_file_(NULL), compressed_frame_buf_(NULL),        frame_sz_(0), frame_(0), end_of_file_(false) {}   virtual ~IVFVideoSource() {    delete[] compressed_frame_buf_;     if (input_file_) fclose(input_file_);  }   virtual void Init() {    // Allocate a buffer for read in the compressed video frame.    compressed_frame_buf_ = new uint8_t[libvpx_test::kCodeBufferSize];    ASSERT_TRUE(compressed_frame_buf_ != NULL)        << "Allocate frame buffer failed";  }   virtual void Begin() {    input_file_ = OpenTestDataFile(file_name_);    ASSERT_TRUE(input_file_ != NULL)        << "Input file open failed. Filename: " << file_name_;     // Read file header    uint8_t file_hdr[kIvfFileHdrSize];    ASSERT_EQ(kIvfFileHdrSize, fread(file_hdr, 1, kIvfFileHdrSize, input_file_))        << "File header read failed.";    // Check file header    ASSERT_TRUE(file_hdr[0] == 'D' && file_hdr[1] == 'K' &&                file_hdr[2] == 'I' && file_hdr[3] == 'F')        << "Input is not an IVF file.";     FillFrame();  }   virtual void Next() {    ++frame_;    FillFrame();  }   void FillFrame() {    ASSERT_TRUE(input_file_ != NULL);    uint8_t frame_hdr[kIvfFrameHdrSize];    // Check frame header and read a frame from input_file.    if (fread(frame_hdr, 1, kIvfFrameHdrSize, input_file_) !=        kIvfFrameHdrSize) {      end_of_file_ = true;    } else {      end_of_file_ = false;       frame_sz_ = MemGetLe32(frame_hdr);      ASSERT_LE(frame_sz_, kCodeBufferSize)          << "Frame is too big for allocated code buffer";      ASSERT_EQ(frame_sz_,                fread(compressed_frame_buf_, 1, frame_sz_, input_file_))          << "Failed to read complete frame";    }  }   virtual const uint8_t *cxdata() const {    return end_of_file_ ? NULL : compressed_frame_buf_;  }  virtual size_t frame_size() const { return frame_sz_; }  virtual unsigned int frame_number() const { return frame_; }  protected:  std::string file_name_;  FILE *input_file_;  uint8_t *compressed_frame_buf_;  size_t frame_sz_;  unsigned int frame_;  bool end_of_file_;}; }  // namespace libvpx_test #endif  // VPX_TEST_IVF_VIDEO_SOURCE_H_