OpenMW/apps/openmw/mwrender/videoplayer.hpp

#ifndef VIDEOPLAYER_H
#define VIDEOPLAYER_H

#include <OgreRoot.h>
#include <OgreHardwarePixelBuffer.h>

#include <boost/thread.hpp>


#define __STDC_CONSTANT_MACROS
#include <stdint.h>
extern "C"
{
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswscale/swscale.h>
}

#include <cstdio>
#include <cmath>

#include "../mwbase/soundmanager.hpp"

#define VIDEO_PICTURE_QUEUE_SIZE 1

namespace MWRender
{
    struct VideoState;

    struct PacketQueue {
        PacketQueue()
          : first_pkt(NULL), last_pkt(NULL), nb_packets(0), size(0)
        { }

        AVPacketList *first_pkt, *last_pkt;
        int nb_packets;
        int size;

        boost::mutex mutex;
        boost::condition_variable cond;

        void put(AVPacket *pkt);
        int get(AVPacket *pkt, VideoState *is, int block);

        void flush();
    };

    struct VideoPicture {
        VideoPicture () : data(NULL), pts(0)
        { }

        uint8_t *data;
        double pts;
    };

    struct VideoState {
        VideoState ()
          : videoStream(-1), audioStream(-1), av_sync_type(0), external_clock(0),
            external_clock_time(0), audio_clock(0), audio_st(NULL), audio_diff_cum(0),
            audio_diff_avg_coef(0), audio_diff_threshold(0), audio_diff_avg_count(0), frame_timer(0),
            frame_last_pts(0), frame_last_delay(0), video_clock(0), video_current_pts(0),
            video_current_pts_time(0), video_st(NULL), rgbaFrame(NULL), pictq_size(0), pictq_rindex(0),
            pictq_windex(0), quit(false), refresh(0), format_ctx(0), sws_context(NULL), display_ready(0)
        {}

        ~VideoState()
        {
            audioq.flush();
            videoq.flush();

            if(pictq_size >= 1)
                free(pictq[0].data);
        }

        void init(const std::string& resourceName);
        void deinit();

        int stream_open(int stream_index, AVFormatContext *pFormatCtx);

        static void video_thread_loop(VideoState *is);
        static void decode_thread_loop(VideoState *is);

        void video_display();
        void video_refresh_timer();

        int queue_picture(AVFrame *pFrame, double pts);
        double synchronize_video(AVFrame *src_frame, double pts);

        static void timer_callback(VideoState* is, boost::system_time t);
        void schedule_refresh(int delay);

        static int OgreResource_Read(void *user_data, uint8_t *buf, int buf_size);
        static int OgreResource_Write(void *user_data, uint8_t *buf, int buf_size);
        static int64_t OgreResource_Seek(void *user_data, int64_t offset, int whence);

        int videoStream, audioStream;

        int     av_sync_type;
        double  external_clock; /* external clock base */
        int64_t external_clock_time;

        double      audio_clock;
        AVStream   *audio_st;
        PacketQueue audioq;
        AVPacket audio_pkt;
        double audio_diff_cum; /* used for AV difference average computation */
        double audio_diff_avg_coef;
        double audio_diff_threshold;
        int    audio_diff_avg_count;

        double      frame_timer;
        double      frame_last_pts;
        double      frame_last_delay;
        double      video_clock; ///<pts of last decoded frame / predicted pts of next decoded frame
        double      video_current_pts; ///<current displayed pts (different from video_clock if frame fifos are used)
        int64_t     video_current_pts_time;    ///<time (av_gettime) at which we updated video_current_pts - used to have running video pts
        AVStream    *video_st;
        PacketQueue videoq;

        Ogre::DataStreamPtr stream;

        MWBase::SoundPtr AudioTrack;

        AVFormatContext* format_ctx;
        SwsContext* sws_context;

        VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
        AVFrame*     rgbaFrame; // used as buffer for the frame converted from its native format to RGBA
        int          pictq_size, pictq_rindex, pictq_windex;

        boost::mutex pictq_mutex;
        boost::condition_variable pictq_cond;

        boost::thread parse_thread;
        boost::thread video_thread;

        volatile int quit;
        volatile bool refresh;

        int display_ready;
    };


    class VideoPlayer
    {

    public:
        VideoPlayer(Ogre::SceneManager* sceneMgr);
        ~VideoPlayer();

        void playVideo (const std::string& resourceName);

        void update();

        void close();

        bool isPlaying();


    private:
        VideoState* mState;

        Ogre::SceneManager* mSceneMgr;
        Ogre::Rectangle2D* mRectangle;
        Ogre::MaterialPtr mVideoMaterial;
    };

}

#endif