[FFmpeg-cvslog] libavformat: Add an example how to use the metadata API
Reinhard Tartler
git at videolan.org
Wed Jul 27 12:49:40 CEST 2011
ffmpeg | branch: release/0.7 | Reinhard Tartler <siretart at tauware.de> | Fri Jul 1 20:50:33 2011 +0200| [c5c265435114ccbfd489a04d8e2f8f3d05d4d858] | committer: Reinhard Tartler
libavformat: Add an example how to use the metadata API
Also include it into the doxygen documentation
(cherry picked from commit 12489443dec228d60fa3dc56695f6ddae08beb37)
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c5c265435114ccbfd489a04d8e2f8f3d05d4d858
---
libavformat/Makefile | 2 +-
libavformat/avformat.h | 2 +
libavformat/metadata-example.c | 56 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 59 insertions(+), 1 deletions(-)
diff --git a/libavformat/Makefile b/libavformat/Makefile
index c2fa8af..7a8aba6 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -335,7 +335,7 @@ OBJS-$(CONFIG_UDP_PROTOCOL) += udp.o
# libavdevice dependencies
OBJS-$(CONFIG_JACK_INDEV) += timefilter.o
-EXAMPLES = output
+EXAMPLES = metadata output
TESTPROGS = timefilter
include $(SUBDIR)../subdir.mak
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 05e80f1..8561a50 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -109,6 +109,8 @@ struct AVFormatContext;
variant_bitrate -- the total bitrate of the bitrate variant that the current stream is part of
@endverbatim
*
+ * Look in the examples section for an application example how to use the Metadata API.
+ *
* @}
*/
diff --git a/libavformat/metadata-example.c b/libavformat/metadata-example.c
new file mode 100644
index 0000000..7bf77e7
--- /dev/null
+++ b/libavformat/metadata-example.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2011 Reinhard Tartler
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/**
+ * @file
+ * @example libavformat/metadata-example.c
+ * Shows how the metadata API can be used in application programs.
+ */
+
+#include <stdio.h>
+
+#include <libavformat/avformat.h>
+#include <libavutil/dict.h>
+
+int main (int argc, char **argv)
+{
+ AVFormatContext *fmt_ctx = NULL;
+ AVDictionaryEntry *tag = NULL;
+ int ret;
+
+ if (argc != 2) {
+ printf("usage: %s <input_file>\n"
+ "example program to demonstrate the use of the libavformat metadata API.\n"
+ "\n", argv[0]);
+ return 1;
+ }
+
+ av_register_all();
+ if ((ret = avformat_open_input(&fmt_ctx, argv[1], NULL, NULL)))
+ return ret;
+
+ while ((tag = av_dict_get(fmt_ctx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
+ printf("%s=%s\n", tag->key, tag->value);
+
+ avformat_free_context(fmt_ctx);
+ return 0;
+}
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