webm_video_source.h 2.73 KB
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/*
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 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
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 *
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 * This source code is subject to the terms of the BSD 2 Clause License and
 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
 * was not distributed with this source code in the LICENSE file, you can
 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
 * Media Patent License 1.0 was not distributed with this source code in the
 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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 */
#ifndef TEST_WEBM_VIDEO_SOURCE_H_
#define TEST_WEBM_VIDEO_SOURCE_H_
#include <cstdarg>
#include <cstdio>
#include <cstdlib>
#include <new>
#include <string>
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#include "../tools_common.h"
#include "../webmdec.h"
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#include "test/video_source.h"

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namespace libaom_test {
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// This class extends VideoSource to allow parsing of WebM files,
// so that we can do actual file decodes.
class WebMVideoSource : public CompressedVideoSource {
 public:
  explicit WebMVideoSource(const std::string &file_name)
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      : file_name_(file_name), aom_ctx_(new AvxInputContext()),
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        webm_ctx_(new WebmInputContext()), buf_(NULL), buf_sz_(0), frame_(0),
        end_of_file_(false) {}
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  virtual ~WebMVideoSource() {
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    if (aom_ctx_->file != NULL) fclose(aom_ctx_->file);
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    webm_free(webm_ctx_);
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    delete aom_ctx_;
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    delete webm_ctx_;
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  }

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  virtual void Init() {}
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  virtual void Begin() {
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    aom_ctx_->file = OpenTestDataFile(file_name_);
    ASSERT_TRUE(aom_ctx_->file != NULL) << "Input file open failed. Filename: "
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                                        << file_name_;
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    ASSERT_EQ(file_is_webm(webm_ctx_, aom_ctx_), 1) << "file is not WebM";
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    FillFrame();
  }

  virtual void Next() {
    ++frame_;
    FillFrame();
  }

  void FillFrame() {
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    ASSERT_TRUE(aom_ctx_->file != NULL);
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    const int status = webm_read_frame(webm_ctx_, &buf_, &buf_sz_);
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    ASSERT_GE(status, 0) << "webm_read_frame failed";
    if (status == 1) {
      end_of_file_ = true;
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    }
  }

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  void SeekToNextKeyFrame() {
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    ASSERT_TRUE(aom_ctx_->file != NULL);
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    do {
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      const int status = webm_read_frame(webm_ctx_, &buf_, &buf_sz_);
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      ASSERT_GE(status, 0) << "webm_read_frame failed";
      ++frame_;
      if (status == 1) {
        end_of_file_ = true;
      }
    } while (!webm_ctx_->is_key_frame && !end_of_file_);
  }

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  virtual const uint8_t *cxdata() const { return end_of_file_ ? NULL : buf_; }
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  virtual size_t frame_size() const { return buf_sz_; }
  virtual unsigned int frame_number() const { return frame_; }
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 protected:
  std::string file_name_;
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  AvxInputContext *aom_ctx_;
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  WebmInputContext *webm_ctx_;
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  uint8_t *buf_;
  size_t buf_sz_;
  unsigned int frame_;
  bool end_of_file_;
};

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}  // namespace libaom_test
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#endif  // TEST_WEBM_VIDEO_SOURCE_H_