lavc: add avcodec_get_type() for mapping codec_id -> type.

doc/APIchanges

@@ -13,6 +13,9 @@ libavutil:   2011-04-18
 
 API changes, most recent first:
 
+2011-08-xx - xxxxxxx - lavc 53.8.0
+  Add avcodec_get_type().
+
 2011-08-06 - 2f63440 - lavf 53.4.0
   Add error_recognition to AVFormatContext.
 

libavcodec/avcodec.h

@@ -210,6 +210,7 @@ enum CodecID {
     CODEC_ID_DFA,
 
     /* various PCM "codecs" */
+    CODEC_ID_FIRST_AUDIO = 0x10000,     ///< A dummy id pointing at the start of audio codecs
     CODEC_ID_PCM_S16LE= 0x10000,
     CODEC_ID_PCM_S16BE,
     CODEC_ID_PCM_U16LE,
@@ -340,6 +341,7 @@ enum CodecID {
     CODEC_ID_QDMC,
 
     /* subtitle codecs */
+    CODEC_ID_FIRST_SUBTITLE = 0x17000,          ///< A dummy ID pointing at the start of subtitle codecs.
     CODEC_ID_DVD_SUBTITLE= 0x17000,
     CODEC_ID_DVB_SUBTITLE,
     CODEC_ID_TEXT,  ///< raw UTF-8 text
@@ -351,6 +353,7 @@ enum CodecID {
     CODEC_ID_SRT,
 
     /* other specific kind of codecs (generally used for attachments) */
+    CODEC_ID_FIRST_UNKNOWN = 0x18000,           ///< A dummy ID pointing at the start of various fake codecs.
     CODEC_ID_TTF= 0x18000,
 
     CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
@@ -4273,4 +4276,9 @@ enum AVLockOp {
  */
 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
 
+/**
+ * Get the type of the given codec.
+ */
+enum AVMediaType avcodec_get_type(enum CodecID codec_id);
+
 #endif /* AVCODEC_AVCODEC_H */

libavcodec/utils.c

@@ -1301,3 +1301,17 @@ int avcodec_thread_init(AVCodecContext *s, int thread_count)
     return ff_thread_init(s);
 }
 #endif
+
+enum AVMediaType avcodec_get_type(enum CodecID codec_id)
+{
+    if (codec_id <= CODEC_ID_NONE)
+        return AVMEDIA_TYPE_UNKNOWN;
+    else if (codec_id < CODEC_ID_FIRST_AUDIO)
+        return AVMEDIA_TYPE_VIDEO;
+    else if (codec_id < CODEC_ID_FIRST_SUBTITLE)
+        return AVMEDIA_TYPE_AUDIO;
+    else if (codec_id < CODEC_ID_FIRST_UNKNOWN)
+        return AVMEDIA_TYPE_SUBTITLE;
+
+    return AVMEDIA_TYPE_UNKNOWN;
+}

libavcodec/version.h

@@ -21,8 +21,8 @@
 #define AVCODEC_VERSION_H
 
 #define LIBAVCODEC_VERSION_MAJOR 53
-#define LIBAVCODEC_VERSION_MINOR  7
-#define LIBAVCODEC_VERSION_MICRO  1
+#define LIBAVCODEC_VERSION_MINOR  8
+#define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \