libav_decoder.h

//
// Copyright (c) 2011 by Jan Eric Kyprianidis <www.kyprianidis.com>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
// 
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
#pragma once

class libav_decoder {
public:
    typedef std::pair<int,int> rational;
    typedef unsigned char uint8_t;
    typedef long long int64_t;

    static libav_decoder* open( const char *path );
    ~libav_decoder();

    bool        next            ();
    void        rewind          ();
    void        set_time        ( int64_t ts, bool exact=true );
    void        set_frame       ( int frame, bool exact=true );
    
    bool        at_end          () const;
    int         width           () const;
    int         height          () const;
    int64_t     duration        () const;
    int64_t     start_time      () const;
    int64_t     end_time        () const;
    int         frame_count     () const;
    rational    frame_rate      () const;
    rational    time_base       () const;
    uint8_t*    buffer          () const;
    int64_t     current_time    () const;
    int         current_frame   () const;
    double      fps             () const;
    int         frame_from_time ( int64_t ts ) const;
    int64_t     time_from_frame ( int frame ) const;
    int64_t     ticks           () const;
    int64_t     ticks_from_time (int64_t t) const;
    int64_t     time_from_ticks (int64_t x) const;

private:
    struct impl;
    impl *m;
    libav_decoder(impl*);
};