FFmpeg/libavdevice/alldevices.c

/*
 * Register all the grabbing devices.
 *
 * This file is part of Libav.
 *
 * Libav is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * Libav is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "config.h"
#include "libavformat/avformat.h"
#include "avdevice.h"

#define REGISTER_OUTDEV(X,x) { \
          extern AVOutputFormat ff_##x##_muxer; \
          if(CONFIG_##X##_OUTDEV)  av_register_output_format(&ff_##x##_muxer); }
#define REGISTER_INDEV(X,x) { \
          extern AVInputFormat ff_##x##_demuxer; \
          if(CONFIG_##X##_INDEV)   av_register_input_format(&ff_##x##_demuxer); }
#define REGISTER_INOUTDEV(X,x)  REGISTER_OUTDEV(X,x); REGISTER_INDEV(X,x)

void avdevice_register_all(void)
{
    static int initialized;

    if (initialized)
        return;
    initialized = 1;

    /* devices */
    REGISTER_INOUTDEV (ALSA, alsa);
    REGISTER_INDEV    (BKTR, bktr);
    REGISTER_INDEV    (DV1394, dv1394);
    REGISTER_INDEV    (FBDEV, fbdev);
    REGISTER_INDEV    (JACK, jack);
    REGISTER_INOUTDEV (OSS, oss);
    REGISTER_INOUTDEV (SNDIO, sndio);
    REGISTER_INDEV    (V4L2, v4l2);
#if FF_API_V4L
    REGISTER_INDEV    (V4L, v4l);
#endif
    REGISTER_INDEV    (VFWCAP, vfwcap);
    REGISTER_INDEV    (X11_GRAB_DEVICE, x11_grab_device);

    /* external libraries */
    REGISTER_INDEV    (LIBDC1394, libdc1394);
}