av_*_next() API for libavformat

Originally committed as revision 11206 to svn://svn.ffmpeg.org/ffmpeg/trunk

4 files changed, 27 insertions, 2 deletions

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 5ac2b23441..9c8419a6a9 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -21,8 +21,8 @@
 #ifndef FFMPEG_AVFORMAT_H
 #define FFMPEG_AVFORMAT_H
 
-#define LIBAVFORMAT_VERSION_INT ((52<<16)+(1<<8)+0)
-#define LIBAVFORMAT_VERSION     52.1.0
+#define LIBAVFORMAT_VERSION_INT ((52<<16)+(2<<8)+0)
+#define LIBAVFORMAT_VERSION     52.2.0
 #define LIBAVFORMAT_BUILD       LIBAVFORMAT_VERSION_INT
 
 #define LIBAVFORMAT_IDENT       "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
@@ -452,8 +452,13 @@ typedef struct AVPacketList {
     struct AVPacketList *next;
 } AVPacketList;
 
+#if LIBAVFORMAT_VERSION_INT < (53<<16)
 extern AVInputFormat *first_iformat;
 extern AVOutputFormat *first_oformat;
+#endif
+
+AVInputFormat  *av_iformat_next(AVInputFormat  *f);
+AVOutputFormat *av_oformat_next(AVOutputFormat *f);
 
 enum CodecID av_guess_image2_codec(const char *filename);
 
diff --git a/libavformat/avio.c b/libavformat/avio.c
index 234a99a15d..3447889988 100644
--- a/libavformat/avio.c
+++ b/libavformat/avio.c
@@ -26,6 +26,12 @@ static int default_interrupt_cb(void);
 URLProtocol *first_protocol = NULL;
 URLInterruptCB *url_interrupt_cb = default_interrupt_cb;
 
+URLProtocol *av_protocol_next(URLProtocol *p)
+{
+    if(p) return p->next;
+    else  return first_protocol;
+}
+
 int register_protocol(URLProtocol *protocol)
 {
     URLProtocol **p;
diff --git a/libavformat/avio.h b/libavformat/avio.h
index 5a8d19f354..95d4672d08 100644
--- a/libavformat/avio.h
+++ b/libavformat/avio.h
@@ -136,6 +136,8 @@ typedef struct URLProtocol {
 extern URLProtocol *first_protocol;
 extern URLInterruptCB *url_interrupt_cb;
 
+URLProtocol *av_protocol_next(URLProtocol *p);
+
 int register_protocol(URLProtocol *protocol);
 
 typedef struct {
diff --git a/libavformat/utils.c b/libavformat/utils.c
index ae1659f4c8..3cd07552c5 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -41,6 +41,18 @@ AVInputFormat *first_iformat = NULL;
 /** head of registered output format linked list. */
 AVOutputFormat *first_oformat = NULL;
 
+AVInputFormat  *av_iformat_next(AVInputFormat  *f)
+{
+    if(f) return f->next;
+    else  return first_iformat;
+}
+
+AVOutputFormat *av_oformat_next(AVOutputFormat *f)
+{
+    if(f) return f->next;
+    else  return first_oformat;
+}
+
 void av_register_input_format(AVInputFormat *format)
 {
     AVInputFormat **p;