gstreamer/subprojects/gst-libav/ext/libav/gstav.c
U. Artie Eoff 649d59b88b gst-libav: add avvideocompare element
The avvideocompare element compares two incoming video buffers using
the specified comparison method (e.g. ssim or psnr).  The first
video buffer is passthrough, unchanged.

The comparison is calculated by using libav's ssim or psnr filters.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3366>
2023-05-04 19:34:06 +00:00

175 lines
4.2 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/* First, include the header file for the plugin, to bring in the
* object definition and other useful things.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <gst/gst.h>
#include "gstav.h"
#include "gstavutils.h"
#include "gstavcfg.h"
#ifdef GST_LIBAV_ENABLE_GPL
#define LICENSE "GPL"
#else
#define LICENSE "LGPL"
#endif
GST_DEBUG_CATEGORY (ffmpeg_debug);
static GMutex gst_avcodec_mutex;
/*
* Check for FFmpeg-provided libavcodec/format
*/
static inline gboolean
gst_ffmpeg_avcodec_is_ffmpeg (void)
{
guint av_version = avcodec_version ();
GST_DEBUG ("Using libavcodec version %d.%d.%d",
av_version >> 16, (av_version & 0x00ff00) >> 8, av_version & 0xff);
/* FFmpeg *_MICRO versions start at 100 and Libav's at 0 */
if ((av_version & 0xff) < 100)
return FALSE;
return TRUE;
}
int
gst_ffmpeg_avcodec_open (AVCodecContext * avctx, const AVCodec * codec)
{
int ret;
g_mutex_lock (&gst_avcodec_mutex);
ret = avcodec_open2 (avctx, codec, NULL);
g_mutex_unlock (&gst_avcodec_mutex);
return ret;
}
int
gst_ffmpeg_avcodec_close (AVCodecContext * avctx)
{
int ret;
g_mutex_lock (&gst_avcodec_mutex);
ret = avcodec_close (avctx);
g_mutex_unlock (&gst_avcodec_mutex);
return ret;
}
int
gst_ffmpeg_av_find_stream_info (AVFormatContext * ic)
{
int ret;
g_mutex_lock (&gst_avcodec_mutex);
ret = avformat_find_stream_info (ic, NULL);
g_mutex_unlock (&gst_avcodec_mutex);
return ret;
}
#ifndef GST_DISABLE_GST_DEBUG
static void
gst_ffmpeg_log_callback (void *ptr, int level, const char *fmt, va_list vl)
{
GstDebugLevel gst_level;
gint len = strlen (fmt);
gchar *fmt2 = NULL;
switch (level) {
case AV_LOG_QUIET:
gst_level = GST_LEVEL_NONE;
break;
case AV_LOG_ERROR:
gst_level = GST_LEVEL_ERROR;
break;
case AV_LOG_INFO:
gst_level = GST_LEVEL_INFO;
break;
case AV_LOG_DEBUG:
gst_level = GST_LEVEL_DEBUG;
break;
default:
gst_level = GST_LEVEL_INFO;
break;
}
/* remove trailing newline as it gets already appended by the logger */
if (fmt[len - 1] == '\n') {
fmt2 = g_strdup (fmt);
fmt2[len - 1] = '\0';
}
gst_debug_log_valist (ffmpeg_debug, gst_level, "", "", 0, NULL,
fmt2 ? fmt2 : fmt, vl);
g_free (fmt2);
}
#endif
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (ffmpeg_debug, "libav", 0, "libav elements");
/* Bail if not FFmpeg. We can no longer ensure operation with Libav */
if (!gst_ffmpeg_avcodec_is_ffmpeg ()) {
GST_ERROR_OBJECT (plugin,
"Incompatible, non-FFmpeg libavcodec/format found");
return FALSE;
}
#ifndef GST_DISABLE_GST_DEBUG
av_log_set_callback (gst_ffmpeg_log_callback);
#endif
gst_ffmpeg_init_pix_fmt_info ();
/* build global ffmpeg param/property info */
gst_ffmpeg_cfg_init ();
gst_ffmpegaudenc_register (plugin);
gst_ffmpegvidenc_register (plugin);
gst_ffmpegauddec_register (plugin);
gst_ffmpegviddec_register (plugin);
gst_ffmpegdemux_register (plugin);
gst_ffmpegmux_register (plugin);
gst_ffmpegdeinterlace_register (plugin);
gst_ffmpegvidcmp_register (plugin);
/* Now we can return the pointer to the newly created Plugin object. */
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
libav,
"All libav codecs and formats (" LIBAV_SOURCE ")",
plugin_init, PACKAGE_VERSION, LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)