Update to opus-HEAD-66611f1.

src/opus.c

 /* Copyright (c) 2011 Xiph.Org Foundation, Skype Limited
    Written by Jean-Marc Valin and Koen Vos */
 /*
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:
 
    - Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 
@@ skipping 148 matching lines @@
    } else if (len<2)
    {
       *size = -1;
       return -1;
    } else {
       *size = 4*data[1] + data[0];
       return 2;
    }
 }
 
+int opus_packet_get_samples_per_frame(const unsigned char *data,
+      opus_int32 Fs)
+{
+   int audiosize;
+   if (data[0]&0x80)
+   {
+      audiosize = ((data[0]>>3)&0x3);
+      audiosize = (Fs<<audiosize)/400;
+   } else if ((data[0]&0x60) == 0x60)
+   {
+      audiosize = (data[0]&0x08) ? Fs/50 : Fs/100;
+   } else {
+      audiosize = ((data[0]>>3)&0x3);
+      if (audiosize == 3)
+         audiosize = Fs*60/1000;
+      else
+         audiosize = (Fs<<audiosize)/100;
+   }
+   return audiosize;
+}
+
 int opus_packet_parse_impl(const unsigned char *data, opus_int32 len,
       int self_delimited, unsigned char *out_toc,
       const unsigned char *frames[48], opus_int16 size[48],
       int *payload_offset, opus_int32 *packet_offset)
 {
    int i, bytes;
    int count;
    int cbr;
    unsigned char ch, toc;
    int framesize;
@@ skipping 141 matching lines @@
 }
 
 int opus_packet_parse(const unsigned char *data, opus_int32 len,
       unsigned char *out_toc, const unsigned char *frames[48],
       opus_int16 size[48], int *payload_offset)
 {
    return opus_packet_parse_impl(data, len, 0, out_toc,
                                  frames, size, payload_offset, NULL);
 }