tor-browser

The Tor Browser
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webm_video_source.h (3243B)

      1 /*
      2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved.
      3 *
      4 * This source code is subject to the terms of the BSD 2 Clause License and
      5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
      6 * was not distributed with this source code in the LICENSE file, you can
      7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
      8 * Media Patent License 1.0 was not distributed with this source code in the
      9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
     10 */
     11 #ifndef AOM_TEST_WEBM_VIDEO_SOURCE_H_
     12 #define AOM_TEST_WEBM_VIDEO_SOURCE_H_
     13 #include <cstdarg>
     14 #include <cstdio>
     15 #include <cstdlib>
     16 #include <new>
     17 #include <string>
     18 #include "common/tools_common.h"
     19 #include "common/webmdec.h"
     20 #include "test/video_source.h"
     21 
     22 namespace libaom_test {
     23 
     24 // This class extends VideoSource to allow parsing of WebM files,
     25 // so that we can do actual file decodes.
     26 class WebMVideoSource : public CompressedVideoSource {
     27 public:
     28  explicit WebMVideoSource(const std::string &file_name)
     29      : file_name_(file_name), aom_ctx_(new AvxInputContext()),
     30        webm_ctx_(new WebmInputContext()), buf_(nullptr), buf_sz_(0),
     31        frame_sz_(0), frame_number_(0), end_of_file_(false) {}
     32 
     33  ~WebMVideoSource() override {
     34    if (aom_ctx_->file != nullptr) fclose(aom_ctx_->file);
     35    webm_free(webm_ctx_);
     36    delete aom_ctx_;
     37    delete webm_ctx_;
     38  }
     39 
     40  void Init() override {
     41    ASSERT_NE(aom_ctx_, nullptr);
     42    ASSERT_NE(webm_ctx_, nullptr);
     43  }
     44 
     45  void Begin() override {
     46    ASSERT_NE(aom_ctx_, nullptr);
     47    ASSERT_NE(webm_ctx_, nullptr);
     48    aom_ctx_->file = OpenTestDataFile(file_name_);
     49    ASSERT_NE(aom_ctx_->file, nullptr)
     50        << "Input file open failed. Filename: " << file_name_;
     51 
     52    ASSERT_EQ(file_is_webm(webm_ctx_, aom_ctx_), 1) << "file is not WebM";
     53 
     54    FillFrame();
     55  }
     56 
     57  void Next() override {
     58    ++frame_number_;
     59    FillFrame();
     60  }
     61 
     62  void FillFrame() {
     63    ASSERT_NE(aom_ctx_, nullptr);
     64    ASSERT_NE(webm_ctx_, nullptr);
     65    ASSERT_NE(aom_ctx_->file, nullptr);
     66    const int status = webm_read_frame(webm_ctx_, &buf_, &frame_sz_, &buf_sz_);
     67    ASSERT_GE(status, 0) << "webm_read_frame failed";
     68    if (status == 1) {
     69      end_of_file_ = true;
     70    }
     71  }
     72 
     73  void SeekToNextKeyFrame() {
     74    ASSERT_NE(aom_ctx_, nullptr);
     75    ASSERT_NE(webm_ctx_, nullptr);
     76    ASSERT_NE(aom_ctx_->file, nullptr);
     77    do {
     78      const int status =
     79          webm_read_frame(webm_ctx_, &buf_, &frame_sz_, &buf_sz_);
     80      ASSERT_GE(status, 0) << "webm_read_frame failed";
     81      ++frame_number_;
     82      if (status == 1) {
     83        end_of_file_ = true;
     84      }
     85    } while (!webm_ctx_->is_key_frame && !end_of_file_);
     86  }
     87 
     88  const uint8_t *cxdata() const override {
     89    return end_of_file_ ? nullptr : buf_;
     90  }
     91  size_t frame_size() const override { return frame_sz_; }
     92  unsigned int frame_number() const override { return frame_number_; }
     93 
     94 protected:
     95  std::string file_name_;
     96  AvxInputContext *aom_ctx_;
     97  WebmInputContext *webm_ctx_;
     98  uint8_t *buf_;  // Owned by webm_ctx_ and freed when webm_ctx_ is freed.
     99  size_t buf_sz_;
    100  size_t frame_sz_;
    101  unsigned int frame_number_;
    102  bool end_of_file_;
    103 };
    104 
    105 }  // namespace libaom_test
    106 
    107 #endif  // AOM_TEST_WEBM_VIDEO_SOURCE_H_