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• Revision 4f660cc018 : Modified mode skip functionality. A previous speed feature skipped modes not us

  5 septembre 2013, par Paul Wilkins

  Changed Paths :
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
   Modify /vp9/encoder/vp9_onyx_int.h

  
   Modify /vp9/encoder/vp9_rdopt.c

  
  
  Modified mode skip functionality.

  A previous speed feature skipped modes not used in earlier
  partitions but this not longer worked as intended following
  changes to the partition coding order and in conjunction
  with some other speed features (Especially speed 2 and above).

  This modified mode skip feature sets a mask after the first X
  modes have been tested in each partition depending on the
  reference frame of the current best case.

  This patch also makes some changes to the order modes are
  tested to fit better with this skip functionality.

  Initial testing suggests speed and rd hit count improvements
  of up to 20% at speed 1. Quality results. (derf -1.9%, std hd +0.23%).

  Change-Id : Idd8efa656cbc0c28f06d09690984c1f18b1115e1

• x86inc : remove misaligned cpu flag

  11 septembre 2013, par Henrik Gramner

  x86inc : remove misaligned cpu flag
  Prevents a crash if the misaligned exception mask bit is
  
  cleared for some reason.
  Misaligned SSE functions are only used on AMD Phenom CPUs
  
  and the benefit is miniscule. They also require modifying
  
  the MXCSR control register and by removing those functions
  
  we can get rid of that complexity altogether.
  Signed-off-by : Derek Buitenhuis <derek.buitenhuis@gmail.com>
  

  • [DBH] libavutil/x86/x86inc.asm

• How to set "ch_layout" in ffmpeg 6.1 ?

  9 juillet 2024, par Steven porite

  In 6.1 Ffmpeg, it use "ch_layout" to replace the "channel_layout" and "number". The "ch_layout" is "AVChannelLayout *" type. This type is defined in channel_layout.h, some kind of "ch_layout" is defined in this file too.
If I want to use the "av_dict_set_int()" set the "ch_layout" to "AV_CHANNEL_LAYOUT_STEREO", what should I fill to the "value" ?

  


  /**
 * Macro to define native channel layouts
 *
 * @note This doesn't use designated initializers for compatibility with C++ 17 and older.
 */
#define AV_CHANNEL_LAYOUT_MASK(nb, m) \
    { /* .order */ AV_CHANNEL_ORDER_NATIVE, \
      /* .nb_channels */  (nb), \
      /* .u.mask */ { m }, \
      /* .opaque */ NULL }

/**
 * @name Common pre-defined channel layouts
 * @{
 */
#define AV_CHANNEL_LAYOUT_MONO              AV_CHANNEL_LAYOUT_MASK(1,  AV_CH_LAYOUT_MONO)
#define AV_CHANNEL_LAYOUT_STEREO            AV_CHANNEL_LAYOUT_MASK(2,  AV_CH_LAYOUT_STEREO)
#define AV_CHANNEL_LAYOUT_2POINT1           AV_CHANNEL_LAYOUT_MASK(3,  AV_CH_LAYOUT_2POINT1)
#define AV_CHANNEL_LAYOUT_2_1               AV_CHANNEL_LAYOUT_MASK(3,  AV_CH_LAYOUT_2_1)


  


  /**
 * Convenience wrapper for av_dict_set() that converts the value to a string
 * and stores it.
 *
 * Note: If ::AV_DICT_DONT_STRDUP_KEY is set, key will be freed on error.
 */
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags);