filmstro_ffmpeg_FFmpegVideoWriter.h

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/*
  ==============================================================================
  Copyright (c) 2017, Filmstro Ltd. - Daniel Walz
  All rights reserved.

  Redistribution and use in source and binary forms, with or without modification,
  are permitted provided that the following conditions are met:
  1. Redistributions of source code must retain the above copyright notice, this
     list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above copyright notice,
     this list of conditions and the following disclaimer in the documentation
     and/or other materials provided with the distribution.
  3. Neither the name of the copyright holder nor the names of its contributors
     may be used to endorse or promote products derived from this software without
     specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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  OF THE POSSIBILITY OF SUCH DAMAGE.
  ==============================================================================
  \class        FFmpegVideoWriter
  \file         filmstro_ffmpeg_FFmpegVideoWriter.h
  \brief        A class to write a video stream using FFmpeg
 
  \author       Daniel Walz @ filmstro.com
  \date         September 19th 2016

  \description  Use this writer to write audio frames and video frames in a
                video file using ffmpeg
  ==============================================================================
 */


#ifndef FILMSTRO_FFMPEG_FFMPEGVIDEOWRITER_H_INCLUDED
#define FILMSTRO_FFMPEG_FFMPEGVIDEOWRITER_H_INCLUDED

class FFmpegVideoSource;


class FFmpegVideoWriter : public FFmpegVideoListener
{
public:

    FFmpegVideoWriter (const juce::String& format = juce::String());
    ~FFmpegVideoWriter();

    void setVideoCodec (AVCodecID codec = AV_CODEC_ID_PROBE);
    void setAudioCodec (AVCodecID codec = AV_CODEC_ID_PROBE);
    void setSubtitleCodec (AVCodecID codec = AV_CODEC_ID_PROBE);

    void setSampleRate (const int newSampleRate);

    void setVideoSize (const int width, const int height);

    void setPixelFormat (const AVPixelFormat format);

    void setPixelAspect (const int num, const int den);

    void setTimeBase (AVMediaType type, AVRational timebase);

    void copySettingsFromContext (const AVCodecContext* context);

    bool openMovieFile (const juce::File& outputFile, const juce::String& format=juce::String());

    void closeMovieFile ();

    void writeNextAudioBlock (juce::AudioSourceChannelInfo& info);

    void writeNextVideoFrame (const juce::Image& image, const juce::int64 timestamp);

    void videoSizeChanged (const int width, const int height, const AVPixelFormat) override;

    void displayNewFrame (const AVFrame*) override;

    static juce::StringArray getOutputFormatNames ();

    // ==============================================================================
private:

    void closeContexts ();

    void finishWriting ();

    bool writeAudioFrame (const bool flush=false);

    int encodeWriteFrame (AVFrame *frame, AVMediaType type);

    // ==============================================================================

    juce::int64             audioWritePosition;

    AVFormatContext*        formatContext;

    AVCodecContext*         videoContext;
    AVCodecContext*         audioContext;
    AVCodecContext*         subtitleContext;

    AVCodecID               videoCodec;
    AVCodecID               audioCodec;
    AVCodecID               subtitleCodec;

    int                     videoStreamIdx;
    int                     audioStreamIdx;
    int                     subtitleStreamIdx;

    AVRational              videoTimeBase;
    AVRational              audioTimeBase;
    AVRational              subtitleTimeBase;

    int                     sampleRate;
    int64_t                 channelLayout;

    int                     videoWidth;
    int                     videoHeight;
    AVPixelFormat           pixelFormat;
    AVRational              pixelAspect;

    // buffer audio to match the video's audio frame size
    AudioBufferFIFO<float>  audioFifo;

    juce::ScopedPointer<FFmpegVideoScaler> outVideoScaler;
    juce::ScopedPointer<FFmpegVideoScaler> inVideoScaler;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (FFmpegVideoWriter)
};

#endif /* FILMSTRO_FFMPEG_FFMPEGVIDEOWRITER_H_INCLUDED */