rtpdec: Cleanup FMTP parsing code in Xiph RTP depacketizer

Patch by Josh Allmann, joshua dot allmann at gmail

Originally committed as revision 23860 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/rtpdec_xiph.c

@@ -286,10 +286,11 @@ parse_packed_headers(const uint8_t * packed_headers,
     return 0;
 }
 
-static int xiph_parse_fmtp_pair(AVCodecContext * codec,
+static int xiph_parse_fmtp_pair(AVStream* stream,
                                 PayloadContext *xiph_data,
                                 char *attr, char *value)
 {
+    AVCodecContext *codec = stream->codec;
     int result = 0;
 
     if (!strcmp(attr, "sampling")) {
@@ -346,34 +347,12 @@ static int xiph_parse_sdp_line(AVFormatContext *s, int st_index,
                                  PayloadContext *data, const char *line)
 {
     const char *p;
-    char *value;
-    char attr[25];
-    int value_size = strlen(line), attr_size = sizeof(attr), res = 0;
-    AVCodecContext* codec = s->streams[st_index]->codec;
-
-    assert(data);
-
-    if (!(value = av_malloc(value_size))) {
-        av_log(codec, AV_LOG_ERROR, "Out of memory\n");
-        return AVERROR(ENOMEM);
-    }
 
     if (av_strstart(line, "fmtp:", &p)) {
-        // remove protocol identifier
-        while (*p && *p == ' ') p++; // strip spaces
-        while (*p && *p != ' ') p++; // eat protocol identifier
-        while (*p && *p == ' ') p++; // strip trailing spaces
-
-        while (ff_rtsp_next_attr_and_value(&p,
-                                           attr, attr_size,
-                                           value, value_size)) {
-            res = xiph_parse_fmtp_pair(codec, data, attr, value);
-            if (res < 0 && res != AVERROR_PATCHWELCOME)
-                return res;
-        }
+        return ff_parse_fmtp(s->streams[st_index], data, p,
+                             xiph_parse_fmtp_pair);
     }
 
-    av_free(value);
     return 0;
 }