shaka-packager/media/base/video_stream_info.cc

// Copyright (c) 2013 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "media/base/video_stream_info.h"

#include <sstream>

#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "media/base/limits.h"

namespace media {

VideoStreamInfo::VideoStreamInfo(int track_id,
                                 uint32 time_scale,
                                 uint64 duration,
                                 VideoCodec codec,
                                 const std::string& codec_string,
                                 const std::string& language,
                                 uint16 width,
                                 uint16 height,
                                 uint8 nalu_length_size,
                                 const uint8* extra_data,
                                 size_t extra_data_size,
                                 bool is_encrypted)
    : StreamInfo(kStreamVideo,
                 track_id,
                 time_scale,
                 duration,
                 codec_string,
                 language,
                 extra_data,
                 extra_data_size,
                 is_encrypted),
      codec_(codec),
      width_(width),
      height_(height),
      nalu_length_size_(nalu_length_size) {}

VideoStreamInfo::~VideoStreamInfo() {}

bool VideoStreamInfo::IsValidConfig() const {
  return codec_ != kUnknownVideoCodec &&
         width_ > 0 && width_ <= limits::kMaxDimension &&
         height_ > 0 && height_ <= limits::kMaxDimension &&
         (nalu_length_size_ <= 2 || nalu_length_size_ == 4);
}

std::string VideoStreamInfo::ToString() const {
  std::ostringstream s;
  s << "codec: " << codec_
    << " width: " << width_
    << " height: " << height_
    << " nalu_length_size_: " << static_cast<int>(nalu_length_size_)
    << " " << StreamInfo::ToString();
  return s.str();
}

std::string VideoStreamInfo::GetCodecString(VideoCodec codec,
                                            uint8 profile,
                                            uint8 compatible_profiles,
                                            uint8 level) {
  switch (codec) {
    case kCodecVP8:
      return "vp8";
    case kCodecVP9:
      return "vp9";
    case kCodecH264: {
      const uint8 bytes[] = {profile, compatible_profiles, level};
      return "avc1." +
             StringToLowerASCII(base::HexEncode(bytes, arraysize(bytes)));
    }
    default:
      NOTIMPLEMENTED() << "Codec: " << codec;
      return "unknown";
  }
}

}  // namespace media