text: /*
    Licensed to the Apache Software Foundation (ASF) under one
    or more contributor license agreements.  See the NOTICE file
    distributed with this work for additional information
    regarding copyright ownership.  The ASF licenses this file
    to you under the Apache License, Version 2.0 (the
    "License"); you may not use this file except in compliance
    with the License.  You may obtain a copy of the License at
  
    http://www.apache.org/licenses/LICENSE-2.0
  
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
  */
  
  #pragma once
  
  #include <cstring>
  #include <cstdlib>
  #include <cstdio>
  #include <unistd.h>
  #include <cinttypes>
  
  #include <ts/ts.h>
  #include <ts/experimental.h>
  #include <ts/remap.h>
  #include "mp4_meta.h"
  
  class IOHandle
  {
  public:
    IOHandle(){};
  
    ~IOHandle()
    {
      if (reader) {
        TSIOBufferReaderFree(reader);
        reader = nullptr;
      }
  
      if (buffer) {
        TSIOBufferDestroy(buffer);
        buffer = nullptr;
      }
    }
  
  public:
    TSVIO vio               = nullptr;
    TSIOBuffer buffer       = nullptr;
    TSIOBufferReader reader = nullptr;
  };
  
  class Mp4TransformContext
  {
  public:
    Mp4TransformContext(float offset, int64_t cl)
      : total(0), tail(0), pos(0), content_length(0), meta_length(0), parse_over(false), raw_transform(false)
    {
      res_buffer = TSIOBufferCreate();
      res_reader = TSIOBufferReaderAlloc(res_buffer);
      dup_reader = TSIOBufferReaderAlloc(res_buffer);
  
      mm.start = offset * 1000;
      mm.cl    = cl;
    }
  
    ~Mp4TransformContext()
    {
      if (res_reader) {
        TSIOBufferReaderFree(res_reader);
      }
  
      if (dup_reader) {
        TSIOBufferReaderFree(dup_reader);
      }
  
      if (res_buffer) {
        TSIOBufferDestroy(res_buffer);
      }
    }
  
  public:
    IOHandle output;
    Mp4Meta mm;
    int64_t total;
    int64_t tail;
    int64_t pos;
    int64_t content_length;
    int64_t meta_length;
  
    TSIOBuffer res_buffer;
    TSIOBufferReader res_reader;
    TSIOBufferReader dup_reader;
  
    bool parse_over;
    bool raw_transform;
  };
  
  class Mp4Context
  {
  public:
    Mp4Context(float s) : start(s), cl(0), mtc(nullptr), transform_added(false){};
  
    ~Mp4Context()
    {
      if (mtc) {
        delete mtc;
        mtc = nullptr;
      }
    }
  
  public:
    float start;
    int64_t cl;
  
    Mp4TransformContext *mtc;
  
    bool transform_added;
  };
  