h26x_byte_to_unit_stream_converter.h

// Copyright 2016 Google LLC. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
 
#ifndef PACKAGER_MEDIA_CODECS_H26X_BYTE_TO_UNIT_STREAM_CONVERTER_H_
#define PACKAGER_MEDIA_CODECS_H26X_BYTE_TO_UNIT_STREAM_CONVERTER_H_
 
#include <cstddef>
#include <cstdint>
#include <vector>
 
#include <packager/macros/classes.h>
#include <packager/media/base/video_stream_info.h>
#include <packager/media/codecs/nalu_reader.h>
 
namespace shaka {
namespace media {
 
class BufferWriter;
 
class H26xByteToUnitStreamConverter {
 public:
  static constexpr size_t kUnitStreamNaluLengthSize = 4;
 
  explicit H26xByteToUnitStreamConverter(Nalu::CodecType type);
 
  H26xByteToUnitStreamConverter(Nalu::CodecType type,
                                H26xStreamFormat stream_format);
 
  virtual ~H26xByteToUnitStreamConverter();
 
  bool ConvertByteStreamToNalUnitStream(const uint8_t* input_frame,
                                        size_t input_frame_size,
                                        std::vector<uint8_t>* output_frame);
 
  virtual bool GetDecoderConfigurationRecord(
      std::vector<uint8_t>* decoder_config) const = 0;
 
  H26xStreamFormat stream_format() const { return stream_format_; }
 
 protected:
  bool strip_parameter_set_nalus() const {
    return stream_format_ ==
           H26xStreamFormat::kNalUnitStreamWithoutParameterSetNalus;
  }
 
  // Warn if (nalu_ptr, nalu_size) does not match with |vector|.
  void WarnIfNotMatch(int nalu_type,
                      const uint8_t* nalu_ptr,
                      size_t nalu_size,
                      const std::vector<uint8_t>& vector);
 
 private:
  // Process the given Nalu.  If this returns true, it was handled and should
  // not be copied to the buffer.
  virtual bool ProcessNalu(const Nalu& nalu) = 0;
 
  Nalu::CodecType type_;
  H26xStreamFormat stream_format_;
 
  DISALLOW_COPY_AND_ASSIGN(H26xByteToUnitStreamConverter);
};
 
}  // namespace media
}  // namespace shaka
 
#endif  // PACKAGER_MEDIA_CODECS_H26x_BYTE_TO_UNIT_STREAM_CONVERTER_H_