net/asterisk-11.x-chan-dongle/patches/100-fix-audio-on-big-endian-systems.patch

   1 Index: asterisk11-chan-dongle-1.1r35/channel.c
   2 ===================================================================
   3 --- asterisk11-chan-dongle-1.1r35.orig/channel.c
   4 +++ asterisk11-chan-dongle-1.1r35/channel.c
   5 @@ -495,6 +495,19 @@ again:
   6         }
   7  }
   8
   9 +// see https://github.com/openwrt/telephony/issues/7
  10 +static inline void change_audio_endianness_to_le(struct iovec *iov, int iovcnt)
  11 +{
  12 +#if __BYTE_ORDER == __LITTLE_ENDIAN
  13 +   return; // nothing to do
  14 +#else
  15 +   for(;iovcnt-->0;iov++)
  16 +   {
  17 +      ast_swapcopy_samples(iov->iov_base, iov->iov_base, iov->iov_len/2);
  18 +   }
  19 +#endif
  20 +}
  21 +
  22  #/* */
  23  static void timing_write (struct pvt* pvt)
  24  {
  25 @@ -522,6 +535,7 @@ static void timing_write (struct pvt* pv
  26                         iovcnt = mixb_read_n_iov (&pvt->a_write_mixb, iov, FRAME_SIZE);
  27                         mixb_read_n_iov (&pvt->a_write_mixb, iov, FRAME_SIZE);
  28                         mixb_read_upd (&pvt->a_write_mixb, FRAME_SIZE);
  29 +                       change_audio_endianness_to_le(iov, iovcnt);
  30                 }
  31                 else if (used > 0)
  32                 {
  33 @@ -535,6 +549,7 @@ static void timing_write (struct pvt* pv
  34                         iov[iovcnt].iov_base    = silence_frame;
  35                         iov[iovcnt].iov_len     = FRAME_SIZE - used;
  36                         iovcnt++;
  37 +                       change_audio_endianness_to_le(iov, iovcnt);
  38                 }
  39                 else
  40                 {
  41 @@ -544,6 +559,7 @@ static void timing_write (struct pvt* pv
  42                         iov[0].iov_base         = silence_frame;
  43                         iov[0].iov_len          = FRAME_SIZE;
  44                         iovcnt                  = 1;
  45 +                       // ignore endianness for zeros
  46  //                     continue;
  47                 }
  48