ffplay.c

static int opt_sync(const char *opt, const char *arg)
{
    if (!strcmp(arg, "audio"))
        av_sync_type = AV_SYNC_AUDIO_MASTER;
    else if (!strcmp(arg, "video"))
        av_sync_type = AV_SYNC_VIDEO_MASTER;
    else if (!strcmp(arg, "ext"))
        av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
    else {
        fprintf(stderr, "Unknown value for %s: %s\n", opt, arg);
        exit(1);
    }
    return 0;
}

static int opt_seek(const char *opt, const char *arg)
{
    start_time = parse_time_or_die(opt, arg, 1);
    return 0;
}

static int opt_duration(const char *opt, const char *arg)
{
    duration = parse_time_or_die(opt, arg, 1);
    return 0;
}

static int opt_show_mode(const char *opt, const char *arg)
{
    show_mode = !strcmp(arg, "video") ? SHOW_MODE_VIDEO :
                !strcmp(arg, "waves") ? SHOW_MODE_WAVES :
                !strcmp(arg, "rdft" ) ? SHOW_MODE_RDFT  :
                parse_number_or_die(opt, arg, OPT_INT, 0, SHOW_MODE_NB-1);
    return 0;
}

static void opt_input_file(void *optctx, const char *filename)
{
    if (input_filename) {
        fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
                filename, input_filename);
        exit_program(1);
    }
    if (!strcmp(filename, "-"))
        filename = "pipe:";
    input_filename = filename;
}

static int opt_codec(void *o, const char *opt, const char *arg)
{
    switch(opt[strlen(opt)-1]){
    case 'a' :    audio_codec_name = arg; break;
    case 's' : subtitle_codec_name = arg; break;
    case 'v' :    video_codec_name = arg; break;
    }
    return 0;
}

static int dummy;

static const OptionDef options[] = {
#include "cmdutils_common_opts.h"
    { "x", HAS_ARG, { (void*)opt_width }, "force displayed width", "width" },
    { "y", HAS_ARG, { (void*)opt_height }, "force displayed height", "height" },
    { "s", HAS_ARG | OPT_VIDEO, { (void*)opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
    { "fs", OPT_BOOL, { (void*)&is_full_screen }, "force full screen" },
    { "an", OPT_BOOL, { (void*)&audio_disable }, "disable audio" },
    { "vn", OPT_BOOL, { (void*)&video_disable }, "disable video" },
    { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&wanted_stream[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_number" },
    { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&wanted_stream[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_number" },
    { "sst", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&wanted_stream[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_number" },
    { "ss", HAS_ARG, { (void*)&opt_seek }, "seek to a given position in seconds", "pos" },
    { "t", HAS_ARG, { (void*)&opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
    { "bytes", OPT_INT | HAS_ARG, { (void*)&seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
    { "nodisp", OPT_BOOL, { (void*)&display_disable }, "disable graphical display" },
    { "f", HAS_ARG, { (void*)opt_format }, "force format", "fmt" },
    { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { (void*)opt_frame_pix_fmt }, "set pixel format", "format" },
    { "stats", OPT_BOOL | OPT_EXPERT, { (void*)&show_status }, "show status", "" },
    { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&workaround_bugs }, "workaround bugs", "" },
    { "fast", OPT_BOOL | OPT_EXPERT, { (void*)&fast }, "non spec compliant optimizations", "" },
    { "genpts", OPT_BOOL | OPT_EXPERT, { (void*)&genpts }, "generate pts", "" },
    { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
    { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&lowres }, "", "" },
    { "skiploop", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&skip_loop_filter }, "", "" },
    { "skipframe", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&skip_frame }, "", "" },
    { "skipidct", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&skip_idct }, "", "" },
    { "idct", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&idct }, "set idct algo",  "algo" },
    { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&error_concealment }, "set error concealment options",  "bit_mask" },
    { "sync", HAS_ARG | OPT_EXPERT, { (void*)opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
    { "autoexit", OPT_BOOL | OPT_EXPERT, { (void*)&autoexit }, "exit at the end", "" },
    { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { (void*)&exit_on_keydown }, "exit on key down", "" },
    { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { (void*)&exit_on_mousedown }, "exit on mouse down", "" },
    { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&loop }, "set number of times the playback shall be looped", "loop count" },
    { "framedrop", OPT_BOOL | OPT_EXPERT, { (void*)&framedrop }, "drop frames when cpu is too slow", "" },
    { "window_title", OPT_STRING | HAS_ARG, { (void*)&window_title }, "set window title", "window title" },
#if CONFIG_AVFILTER
    { "vf", OPT_STRING | HAS_ARG, { (void*)&vfilters }, "video filters", "filter list" },
#endif
    { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { (void*)&rdftspeed }, "rdft speed", "msecs" },
    { "showmode", HAS_ARG, {(void*)opt_show_mode}, "select show mode (0 = video, 1 = waves, 2 = RDFT)", "mode" },
    { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { (void*)opt_default }, "generic catch all option", "" },
    { "i", OPT_BOOL, {(void *)&dummy}, "read specified file", "input_file"},
    { "codec", HAS_ARG | OPT_FUNC2, {(void*)opt_codec}, "force decoder", "decoder" },
    { NULL, },
};

static void show_usage(void)
{
    av_log(NULL, AV_LOG_INFO, "Simple media player\n");
    av_log(NULL, AV_LOG_INFO, "usage: %s [options] input_file\n", program_name);
    av_log(NULL, AV_LOG_INFO, "\n");
}

static int opt_help(const char *opt, const char *arg)
{
    av_log_set_callback(log_callback_help);
    show_usage();
    show_help_options(options, "Main options:\n",
                      OPT_EXPERT, 0);
    show_help_options(options, "\nAdvanced options:\n",
                      OPT_EXPERT, OPT_EXPERT);
    printf("\n");
    show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
    show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
#if !CONFIG_AVFILTER
    show_help_children(sws_get_class(), AV_OPT_FLAG_ENCODING_PARAM);
#endif
    printf("\nWhile playing:\n"
           "q, ESC              quit\n"
           "f                   toggle full screen\n"
           "p, SPC              pause\n"
           "a                   cycle audio channel\n"
           "v                   cycle video channel\n"
           "t                   cycle subtitle channel\n"
           "w                   show audio waves\n"
           "s                   activate frame-step mode\n"
           "left/right          seek backward/forward 10 seconds\n"
           "down/up             seek backward/forward 1 minute\n"
           "page down/page up   seek backward/forward 10 minutes\n"
           "mouse click         seek to percentage in file corresponding to fraction of width\n"
           );
    return 0;
}

static int lockmgr(void **mtx, enum AVLockOp op)
{
   switch(op) {
      case AV_LOCK_CREATE:
          *mtx = SDL_CreateMutex();
          if(!*mtx)
              return 1;
          return 0;
      case AV_LOCK_OBTAIN:
          return !!SDL_LockMutex(*mtx);
      case AV_LOCK_RELEASE:
          return !!SDL_UnlockMutex(*mtx);
      case AV_LOCK_DESTROY:
          SDL_DestroyMutex(*mtx);
          return 0;
   }
   return 1;
}

/* Called from the main */
int main(int argc, char **argv)
{
    int flags;
    VideoState *is;

    av_log_set_flags(AV_LOG_SKIP_REPEATED);
    parse_loglevel(argc, argv, options);

    /* register all codecs, demux and protocols */
    avcodec_register_all();
#if CONFIG_AVDEVICE
    avdevice_register_all();
#endif
#if CONFIG_AVFILTER
    avfilter_register_all();
#endif
    av_register_all();
    avformat_network_init();

    init_opts();

    signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
    signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */

    show_banner(argc, argv, options);

    parse_options(NULL, argc, argv, options, opt_input_file);

    if (!input_filename) {
        show_usage();
        fprintf(stderr, "An input file must be specified\n");
        fprintf(stderr, "Use -h to get full help or, even better, run 'man %s'\n", program_name);
        exit(1);
    }

    if (display_disable) {
        video_disable = 1;
    }
    flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
    if (audio_disable)
        flags &= ~SDL_INIT_AUDIO;
#if !defined(__MINGW32__) && !defined(__APPLE__)
    flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */
#endif
    if (SDL_Init (flags)) {
        fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError());
        fprintf(stderr, "(Did you set the DISPLAY variable?)\n");
        exit(1);
    }

    if (!display_disable) {
#if HAVE_SDL_VIDEO_SIZE
        const SDL_VideoInfo *vi = SDL_GetVideoInfo();
        fs_screen_width = vi->current_w;
        fs_screen_height = vi->current_h;
#endif
    }

    SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
    SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
    SDL_EventState(SDL_USEREVENT, SDL_IGNORE);

    if (av_lockmgr_register(lockmgr)) {
        fprintf(stderr, "Could not initialize lock manager!\n");
        do_exit(NULL);
    }

    av_init_packet(&flush_pkt);
    flush_pkt.data = (char *)(intptr_t)"FLUSH";

    is = stream_open(input_filename, file_iformat);
    if (!is) {
        fprintf(stderr, "Failed to initialize VideoState!\n");
        do_exit(NULL);
    }

    event_loop(is);

    /* never returns */

    return 0;
}