src/media/codec/codecs/vaapi/avcc_processor.h

// Copyright 2022 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SRC_MEDIA_CODEC_CODECS_VAAPI_AVCC_PROCESSOR_H_
#define SRC_MEDIA_CODEC_CODECS_VAAPI_AVCC_PROCESSOR_H_

#include <lib/fit/function.h>
#include <lib/media/codec_impl/codec_adapter_events.h>
#include <lib/media/codec_impl/codec_input_item.h>

#include <vector>

#include "media/base/decoder_buffer.h"

// TODO(https://fxbug.dev/42177138): Move to a centralized location.
class AvccProcessor {
 public:
  using BufferCallback = fit::function<void(media::DecoderBuffer)>;

  explicit AvccProcessor(BufferCallback decode_annex_b, CodecAdapterEvents* codec_adapter_events)
      : decode_annex_b_(std::move(decode_annex_b)), events_(codec_adapter_events) {}

  void ProcessOobBytes(const fuchsia::media::FormatDetails& format_details);
  std::vector<uint8_t> ParseVideoAvcc(const uint8_t* data, size_t data_size) const;

  bool is_avcc() const { return is_avcc_; }

 private:
  BufferCallback decode_annex_b_;
  CodecAdapterEvents* events_;
  bool is_avcc_ = false;
  uint32_t pseudo_nal_length_field_bytes_ = 0;
};

#endif  // SRC_MEDIA_CODEC_CODECS_VAAPI_AVCC_PROCESSOR_H_