upload sdk

git-svn-id: svn://kolibrios.org@4349 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/ffmpeg/libavformat/options.c

@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include "avformat.h"
+#include "avio_internal.h"
+#include "libavutil/opt.h"
+
+/**
+ * @file
+ * Options definition for AVFormatContext.
+ */
+
+#include "options_table.h"
+
+static const char* format_to_name(void* ptr)
+{
+    AVFormatContext* fc = (AVFormatContext*) ptr;
+    if(fc->iformat) return fc->iformat->name;
+    else if(fc->oformat) return fc->oformat->name;
+    else return "NULL";
+}
+
+static void *format_child_next(void *obj, void *prev)
+{
+    AVFormatContext *s = obj;
+    if (!prev && s->priv_data &&
+        ((s->iformat && s->iformat->priv_class) ||
+          s->oformat && s->oformat->priv_class))
+        return s->priv_data;
+    if (s->pb && s->pb->av_class && prev != s->pb)
+        return s->pb;
+    return NULL;
+}
+
+static const AVClass *format_child_class_next(const AVClass *prev)
+{
+    AVInputFormat  *ifmt = NULL;
+    AVOutputFormat *ofmt = NULL;
+
+    if (!prev)
+        return &ffio_url_class;
+
+    while ((ifmt = av_iformat_next(ifmt)))
+        if (ifmt->priv_class == prev)
+            break;
+
+    if (!ifmt)
+        while ((ofmt = av_oformat_next(ofmt)))
+            if (ofmt->priv_class == prev)
+                break;
+    if (!ofmt)
+        while (ifmt = av_iformat_next(ifmt))
+            if (ifmt->priv_class)
+                return ifmt->priv_class;
+
+    while (ofmt = av_oformat_next(ofmt))
+        if (ofmt->priv_class)
+            return ofmt->priv_class;
+
+    return NULL;
+}
+
+static AVClassCategory get_category(void *ptr)
+{
+    AVFormatContext* s = ptr;
+    if(s->iformat) return AV_CLASS_CATEGORY_DEMUXER;
+    else           return AV_CLASS_CATEGORY_MUXER;
+}
+
+static const AVClass av_format_context_class = {
+    .class_name     = "AVFormatContext",
+    .item_name      = format_to_name,
+    .option         = avformat_options,
+    .version        = LIBAVUTIL_VERSION_INT,
+    .child_next     = format_child_next,
+    .child_class_next = format_child_class_next,
+    .category       = AV_CLASS_CATEGORY_MUXER,
+    .get_category   = get_category,
+};
+
+static void avformat_get_context_defaults(AVFormatContext *s)
+{
+    memset(s, 0, sizeof(AVFormatContext));
+
+    s->av_class = &av_format_context_class;
+
+    av_opt_set_defaults(s);
+}
+
+AVFormatContext *avformat_alloc_context(void)
+{
+    AVFormatContext *ic;
+    ic = av_malloc(sizeof(AVFormatContext));
+    if (!ic) return ic;
+    avformat_get_context_defaults(ic);
+    return ic;
+}
+
+enum AVDurationEstimationMethod av_fmt_ctx_get_duration_estimation_method(const AVFormatContext* ctx)
+{
+    return ctx->duration_estimation_method;
+}
+
+const AVClass *avformat_get_class(void)
+{
+    return &av_format_context_class;
+}