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99ec53073a
Without a parent class,the documentation would need to be duplicated for every CODECs. This patch adds an abstract class in between GstVideoDecoder and the element. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3311>
175 lines
4.2 KiB
C
175 lines
4.2 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/* First, include the header file for the plugin, to bring in the
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* object definition and other useful things.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <gst/gst.h>
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#include "gstav.h"
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#include "gstavutils.h"
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#include "gstavcfg.h"
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#ifdef GST_LIBAV_ENABLE_GPL
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#define LICENSE "GPL"
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#else
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#define LICENSE "LGPL"
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#endif
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GST_DEBUG_CATEGORY (ffmpeg_debug);
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static GMutex gst_avcodec_mutex;
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/*
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* Check for FFmpeg-provided libavcodec/format
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*/
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static inline gboolean
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gst_ffmpeg_avcodec_is_ffmpeg (void)
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{
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guint av_version = avcodec_version ();
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GST_DEBUG ("Using libavcodec version %d.%d.%d",
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av_version >> 16, (av_version & 0x00ff00) >> 8, av_version & 0xff);
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/* FFmpeg *_MICRO versions start at 100 and Libav's at 0 */
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if ((av_version & 0xff) < 100)
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return FALSE;
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return TRUE;
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}
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int
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gst_ffmpeg_avcodec_open (AVCodecContext * avctx, const AVCodec * codec)
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{
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int ret;
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g_mutex_lock (&gst_avcodec_mutex);
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ret = avcodec_open2 (avctx, codec, NULL);
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g_mutex_unlock (&gst_avcodec_mutex);
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return ret;
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}
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int
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gst_ffmpeg_avcodec_close (AVCodecContext * avctx)
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{
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int ret;
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g_mutex_lock (&gst_avcodec_mutex);
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ret = avcodec_close (avctx);
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g_mutex_unlock (&gst_avcodec_mutex);
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return ret;
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}
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int
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gst_ffmpeg_av_find_stream_info (AVFormatContext * ic)
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{
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int ret;
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g_mutex_lock (&gst_avcodec_mutex);
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ret = avformat_find_stream_info (ic, NULL);
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g_mutex_unlock (&gst_avcodec_mutex);
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return ret;
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}
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#ifndef GST_DISABLE_GST_DEBUG
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static void
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gst_ffmpeg_log_callback (void *ptr, int level, const char *fmt, va_list vl)
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{
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GstDebugLevel gst_level;
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gint len = strlen (fmt);
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gchar *fmt2 = NULL;
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switch (level) {
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case AV_LOG_QUIET:
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gst_level = GST_LEVEL_NONE;
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break;
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case AV_LOG_ERROR:
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gst_level = GST_LEVEL_ERROR;
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break;
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case AV_LOG_INFO:
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gst_level = GST_LEVEL_INFO;
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break;
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case AV_LOG_DEBUG:
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gst_level = GST_LEVEL_DEBUG;
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break;
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default:
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gst_level = GST_LEVEL_INFO;
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break;
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}
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/* remove trailing newline as it gets already appended by the logger */
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if (fmt[len - 1] == '\n') {
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fmt2 = g_strdup (fmt);
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fmt2[len - 1] = '\0';
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}
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gst_debug_log_valist (ffmpeg_debug, gst_level, "", "", 0, NULL,
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fmt2 ? fmt2 : fmt, vl);
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g_free (fmt2);
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}
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#endif
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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GST_DEBUG_CATEGORY_INIT (ffmpeg_debug, "libav", 0, "libav elements");
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/* Bail if not FFmpeg. We can no longer ensure operation with Libav */
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if (!gst_ffmpeg_avcodec_is_ffmpeg ()) {
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GST_ERROR_OBJECT (plugin,
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"Incompatible, non-FFmpeg libavcodec/format found");
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return FALSE;
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}
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#ifndef GST_DISABLE_GST_DEBUG
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av_log_set_callback (gst_ffmpeg_log_callback);
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#endif
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gst_ffmpeg_init_pix_fmt_info ();
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/* build global ffmpeg param/property info */
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gst_ffmpeg_cfg_init ();
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gst_ffmpegaudenc_register (plugin);
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gst_ffmpegvidenc_register (plugin);
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gst_ffmpegauddec_register (plugin);
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gst_ffmpegviddec_register (plugin);
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gst_ffmpegdemux_register (plugin);
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gst_ffmpegmux_register (plugin);
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gst_ffmpegdeinterlace_register (plugin);
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/* Now we can return the pointer to the newly created Plugin object. */
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return TRUE;
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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libav,
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"All libav codecs and formats (" LIBAV_SOURCE ")",
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plugin_init, PACKAGE_VERSION, LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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