srs/trunk/src/app/srs_app_ffmpeg.hpp

/*
The MIT License (MIT)

Copyright (c) 2013-2015 SRS(simple-rtmp-server)

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#ifndef SRS_APP_FFMPEG_HPP
#define SRS_APP_FFMPEG_HPP

/*
#include <srs_app_ffmpeg.hpp>
*/
#include <srs_core.hpp>

#ifdef SRS_AUTO_FFMPEG_STUB

#include <string>
#include <vector>

class SrsConfDirective;
class SrsPithyPrint;

/**
* a transcode engine: ffmepg,
* used to transcode a stream to another.
*/
class SrsFFMPEG
{
private:
    bool started;
    // whether SIGTERM send but need to wait or SIGKILL.
    bool fast_stopped;
    pid_t pid;
private:
    std::string log_file;
private:
    std::string                 ffmpeg;
    std::string                 _iparams;
    std::string                 iformat;
    std::string                 input;
    std::vector<std::string>    vfilter;
    std::string                 vcodec;
    int                         vbitrate;
    double                      vfps;
    int                         vwidth;
    int                         vheight;
    int                         vthreads;
    std::string                 vprofile;
    std::string                 vpreset;
    std::vector<std::string>    vparams;
    std::string                 acodec;
    int                         abitrate;
    int                         asample_rate;
    int                         achannels;
    std::vector<std::string>    aparams;
    std::string                 oformat;
    std::string                 _output;
public:
    SrsFFMPEG(std::string ffmpeg_bin);
    virtual ~SrsFFMPEG();
public:
    virtual void set_iparams(std::string iparams);
    virtual void set_oformat(std::string format);
    virtual std::string output();
public:
    virtual int initialize(std::string in, std::string out, std::string log);
    virtual int initialize_transcode(SrsConfDirective* engine);
    virtual int initialize_copy();
    virtual int start();
    virtual int cycle();
    /**
     * send SIGTERM then SIGKILL to ensure the process stopped.
     * the stop will wait [0, SRS_PROCESS_QUIT_TIMEOUT_MS] depends on the 
     * process quit timeout.
     * @remark use fast_stop before stop one by one, when got lots of process to quit.
     */
    virtual void stop();
public:
    /**
     * the fast stop is to send a SIGTERM.
     * for example, the ingesters owner lots of FFMPEG, it will take a long time
     * to stop one by one, instead the ingesters can fast_stop all FFMPEG, then
     * wait one by one to stop, it's more faster.
     * @remark user must use stop() to ensure the ffmpeg to stopped.
     * @remark we got N processes to stop, compare the time we spend,
     *      when use stop without fast_stop, we spend maybe [0, SRS_PROCESS_QUIT_TIMEOUT_MS * N]
     *      but use fast_stop then stop, the time is almost [0, SRS_PROCESS_QUIT_TIMEOUT_MS].
     */
    virtual void fast_stop();
};

#endif

#endif