.. _program_listing_file_include_broll_video_reader.hpp:

Program Listing for File video_reader.hpp
=========================================

|exhale_lsh| :ref:`Return to documentation for file <file_include_broll_video_reader.hpp>` (``include/broll/video_reader.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // Copyright 2023 Bonsai Robotics, Inc - All Rights Reserved
   //
   // Licensed 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.
   
   #ifndef BROLL__VIDEO_READER_HPP_
   #define BROLL__VIDEO_READER_HPP_
   
   extern "C" {
   #include <libavcodec/avcodec.h>
   #if LIBAVCODEC_VERSION_MAJOR >= 60
   #include <libavcodec/bsf.h>
   #endif
   #include <libavformat/avformat.h>
   #include <libswscale/swscale.h>
   }
   
   #include <filesystem>
   #include <string>
   
   namespace broll
   {
   
   class VideoReader
   {
   public:
     explicit VideoReader(const std::filesystem::path & videoFilename);
     virtual ~VideoReader();
   
     // Core API
     AVPacket * read_next();
   
     // Information accessors
     AVCodecID codec_id() const;
     std::chrono::nanoseconds ts_scale() const;
     std::chrono::nanoseconds duration() const;
     uint64_t frame_count() const;
     std::string format_name() const;
   
   protected:
     AVPacket * nextPacket_ = nullptr;
     AVPacket * bsfPacket_ = nullptr;
     AVFormatContext * formatCtx_ = nullptr;
     const AVBitStreamFilter * bitstreamFilter_ = nullptr;
     AVBSFContext * bsfCtx_ = nullptr;
     AVStream * stream_ = nullptr;
     AVCodecID codecId_ = AV_CODEC_ID_NONE;
     int videoStreamIndex_ = -1;
     AVCodecParameters * codecParams_ = nullptr;
     std::string format_name_;
     std::chrono::nanoseconds ts_scale_;  // nanoseconds per pts unit
   };
   
   }  // namespace broll
   
   #endif  // BROLL__VIDEO_READER_HPP_