shithub: libopusenc

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Implements changing the vendor string

--- a/src/opus_header.c

+++ b/src/opus_header.c

@@ -240,6 +240,25 @@

     *length=newlen;

   }

 }

+

+int comment_replace_vendor_string(char **comments, int* length, const char *vendor_string)

+{

+  char* p=*comments;

+  int vendor_length;

+  int newlen;

+  int newvendor_length;

+  vendor_length=readint(p, 8);

+  newvendor_length=strlen(vendor_string);

+  newlen=*length+newvendor_length-vendor_length;

+  p=realloc(p, newlen);

+  if (p == NULL) return 1;

+  writeint(p, 8, newvendor_length);

+  memmove(p+12+newvendor_length, p+12+vendor_length, newlen-12-newvendor_length);

+  memcpy(p+12, vendor_string, newvendor_length);

+  *comments=p;

+  *length=newlen;

+  return 0;

+}

 #undef readint

 #undef writeint

--- a/src/opus_header.h

+++ b/src/opus_header.h

@@ -54,4 +54,6 @@

 void comment_pad(char **comments, int* length, int amount);

+int comment_replace_vendor_string(char **comments, int* length, const char *vendor_string);

+

 #endif

--- a/src/opusenc.c

+++ b/src/opusenc.c

@@ -590,6 +590,7 @@

 int ope_set_vendor_string(OggOpusEnc *enc, const char *vendor) {

   if (enc->last_stream->header_is_frozen) return OPE_TOO_LATE;

   if (enc->last_stream->stream_is_init) return OPE_TOO_LATE;

+  if (comment_replace_vendor_string(&enc->last_stream->comment, &enc->last_stream->comment_length, vendor)) return OPE_INTERNAL_ERROR;

   (void)vendor;

   return OPE_UNIMPLEMENTED;

 }