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