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• avformat/nutenc : Reuse dynamic buffers when possible

  4 mai 2020, par Andreas Rheinhardt

  avformat/nutenc : Reuse dynamic buffers when possible
  NUT uses variable-length integers in order to for length fields.
  
  Therefore the NUT muxer often writes data into a dynamic buffer in order
  
  to get the length of it, then writes the length field using the fewest
  
  amount of bytes needed. To do this, a new dynamic buffer was opened,
  
  used and freed for each element which involves lots of allocations. This
  
  commit changes this : The dynamic buffers are now resetted and reused.
  Reviewed-by : Michael Niedermayer <michael@niedermayer.cc>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/nutenc.c

• avformat/ttaenc : Defer freeing dynamic buffer

  20 mai 2020, par Andreas Rheinhardt

  avformat/ttaenc : Defer freeing dynamic buffer
  The TTA muxer writes a seektable in a dynamic buffer as it receives
  
  packets and when writing the trailer, closes the dynamic buffer using
  
  avio_close_dyn_buf(), writes the seektable and frees the buffer. But
  
  the TTA muxer already has a deinit function which unconditionally
  
  calls ffio_free_dyn_buf() on the dynamic buffer, so switching to
  
  avio_get_dyn_buf() means that one can remove the code to free the
  
  buffer ; furthermore, it also might save an allocation if the seektable
  
  is so small that it fits into the dynamic buffer's write buffer or if
  
  adding the padding that avio_close_dyn_buf() adds necessitated
  
  reallocating of the underlying buffer.
  Reviewed-by : James Almer <jamrial@gmail.com>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/ttaenc.c

• How to play raw audio in Iphone ? (using ffmpeg)

  19 novembre 2011, par KayKay

  I am a student who is trying to make mms stream audio app.
  I got mms stream using libmms, and decoded wma audio using ffmpeg.
  But however I don't know What to do next.

  I recently saw similar question in stackoverflow site. (Writer is c4r1o5)
  But He used cfwritestreamwrite after avcodec_decode_audio2.
  Is that right ? I think It is not necessary because network problem finished after mms_connect, ffmpeg decode.

  Is that necessary to use ?
  I tried to put raw audio to audio buffer. and when play, It only comes with white noise.

  Please help me.
  Any hint or comment would be vey appreciated.
  Thanks in advance.