119 строки
3.2 KiB
C++
119 строки
3.2 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_I420_VIDEO_SOURCE_H_
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#define TEST_I420_VIDEO_SOURCE_H_
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#include <cstdio>
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#include <cstdlib>
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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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// This class extends VideoSource to allow parsing of raw yv12
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// so that we can do actual file encodes.
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class I420VideoSource : public VideoSource {
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public:
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I420VideoSource(const std::string &file_name,
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unsigned int width, unsigned int height,
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int rate_numerator, int rate_denominator,
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unsigned int start, int limit)
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: file_name_(file_name),
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input_file_(NULL),
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img_(NULL),
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start_(start),
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limit_(limit),
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frame_(0),
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width_(0),
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height_(0),
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framerate_numerator_(rate_numerator),
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framerate_denominator_(rate_denominator) {
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// This initializes raw_sz_, width_, height_ and allocates an img.
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SetSize(width, height);
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}
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virtual ~I420VideoSource() {
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vpx_img_free(img_);
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if (input_file_)
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fclose(input_file_);
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}
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virtual void Begin() {
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if (input_file_)
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fclose(input_file_);
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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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if (start_) {
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fseek(input_file_, static_cast<unsigned>(raw_sz_) * start_, SEEK_SET);
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}
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frame_ = start_;
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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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virtual vpx_image_t *img() const { return (frame_ < limit_) ? img_ : NULL; }
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// Models a stream where Timebase = 1/FPS, so pts == frame.
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virtual vpx_codec_pts_t pts() const { return frame_; }
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virtual unsigned long duration() const { return 1; }
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virtual vpx_rational_t timebase() const {
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const vpx_rational_t t = { framerate_denominator_, framerate_numerator_ };
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return t;
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}
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virtual unsigned int frame() const { return frame_; }
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virtual unsigned int limit() const { return limit_; }
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void SetSize(unsigned int width, unsigned int height) {
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if (width != width_ || height != height_) {
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vpx_img_free(img_);
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img_ = vpx_img_alloc(NULL, VPX_IMG_FMT_I420, width, height, 1);
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ASSERT_TRUE(img_ != NULL);
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width_ = width;
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height_ = height;
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raw_sz_ = width * height * 3 / 2;
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}
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}
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virtual void FillFrame() {
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ASSERT_TRUE(input_file_ != NULL);
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// Read a frame from input_file.
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if (fread(img_->img_data, raw_sz_, 1, input_file_) == 0) {
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limit_ = frame_;
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}
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}
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protected:
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std::string file_name_;
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FILE *input_file_;
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vpx_image_t *img_;
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size_t raw_sz_;
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unsigned int start_;
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unsigned int limit_;
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unsigned int frame_;
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unsigned int width_;
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unsigned int height_;
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int framerate_numerator_;
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int framerate_denominator_;
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};
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} // namespace libvpx_test
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#endif // TEST_I420_VIDEO_SOURCE_H_
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