plugins/experimental/mp4/mp4_common.h

/*
  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 <memory>
#include <unistd.h>
#include <cinttypes>

#include <ts/ts.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() {}

public:
  float   start;
  int64_t cl;

  std::unique_ptr<Mp4TransformContext> mtc;

  bool transform_added;
};