early-access version 1432

externals/ffmpeg/libavformat/options.c

@@ -0,0 +1,173 @@
+/*
+ * 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 "internal.h"
+
+#include "libavutil/internal.h"
+#include "libavutil/opt.h"
+
+/**
+ * @file
+ * Options definition for AVFormatContext.
+ */
+
+FF_DISABLE_DEPRECATION_WARNINGS
+#include "options_table.h"
+FF_ENABLE_DEPRECATION_WARNINGS
+
+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 &ff_avio_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 int io_open_default(AVFormatContext *s, AVIOContext **pb,
+                           const char *url, int flags, AVDictionary **options)
+{
+    int loglevel;
+
+    if (!strcmp(url, s->url) ||
+        s->iformat && !strcmp(s->iformat->name, "image2") ||
+        s->oformat && !strcmp(s->oformat->name, "image2")
+    ) {
+        loglevel = AV_LOG_DEBUG;
+    } else
+        loglevel = AV_LOG_INFO;
+
+    av_log(s, loglevel, "Opening \'%s\' for %s\n", url, flags & AVIO_FLAG_WRITE ? "writing" : "reading");
+
+#if FF_API_OLD_OPEN_CALLBACKS
+FF_DISABLE_DEPRECATION_WARNINGS
+    if (s->open_cb)
+        return s->open_cb(s, pb, url, flags, &s->interrupt_callback, options);
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+    return ffio_open_whitelist(pb, url, flags, &s->interrupt_callback, options, s->protocol_whitelist, s->protocol_blacklist);
+}
+
+static void io_close_default(AVFormatContext *s, AVIOContext *pb)
+{
+    avio_close(pb);
+}
+
+static void avformat_get_context_defaults(AVFormatContext *s)
+{
+    memset(s, 0, sizeof(AVFormatContext));
+
+    s->av_class = &av_format_context_class;
+
+    s->io_open  = io_open_default;
+    s->io_close = io_close_default;
+
+    av_opt_set_defaults(s);
+}
+
+AVFormatContext *avformat_alloc_context(void)
+{
+    AVFormatContext *ic;
+    AVFormatInternal *internal;
+    ic = av_malloc(sizeof(AVFormatContext));
+    if (!ic) return ic;
+
+    internal = av_mallocz(sizeof(*internal));
+    if (!internal) {
+        av_free(ic);
+        return NULL;
+    }
+    avformat_get_context_defaults(ic);
+    ic->internal = internal;
+    ic->internal->offset = AV_NOPTS_VALUE;
+    ic->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
+    ic->internal->shortest_end = AV_NOPTS_VALUE;
+
+    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;
+}