1. 24 Jun, 2017 1 commit
  2. 14 Jun, 2017 2 commits
  3. 21 May, 2017 6 commits
  4. 19 May, 2017 1 commit
    • Henrik Gramner's avatar
      osdep: Rework alignment macros · d13b4c3a
      Henrik Gramner authored
      Drop ALIGNED_N and ALIGNED_ARRAY_N in favor of using explicit alignment.
      This will allow us to increase the native alignment without unnecessarily
      increasing the alignment of everything that's currently 32-byte aligned.
  5. 21 Jan, 2017 3 commits
  6. 01 Dec, 2016 1 commit
    • Anton Mitrofanov's avatar
      Cosmetics · b2b39dae
      Anton Mitrofanov authored
      Also make x264_weighted_reference_duplicate() static.
  7. 20 Apr, 2016 1 commit
  8. 16 Jan, 2016 1 commit
  9. 18 Aug, 2015 1 commit
  10. 23 Feb, 2015 1 commit
  11. 20 Jul, 2014 1 commit
  12. 24 Feb, 2014 1 commit
  13. 21 Jan, 2014 2 commits
  14. 08 Jan, 2014 1 commit
  15. 30 Oct, 2013 2 commits
  16. 23 Aug, 2013 2 commits
    • Kieran Kunhya's avatar
      AVC-Intra support · 9b94896b
      Kieran Kunhya authored
      This format has been reverse engineered and x264's output has almost exactly
      the same bitstream as Panasonic cameras and encoders produce. It therefore does
      not comply with SMPTE RP2027 since Panasonic themselves do not comply with
      their own specification. It has been tested in Avid, Premiere, Edius and
      Parts of this patch were written by Fiona Glaser and some reverse
      engineering was done by Joseph Artsimovich.
    • Henrik Gramner's avatar
      Transparent hugepage support · fa1e2b74
      Henrik Gramner authored
      Combine frame and mb data mallocs into a single large malloc.
      Additionally, on Linux systems with hugepage support, ask for hugepages on
      large mallocs.
      This gives a small performance improvement (~0.2-0.9%) on systems without
      hugepage support, as well as a small memory footprint reduction.
      On recent Linux kernels with hugepage support enabled (set to madvise or
      always), it improves performance up to 4% at the cost of about 7-12% more
      memory usage on typical settings..
      It may help even more on Haswell and other recent CPUs with improved 2MB page
      support in hardware.
  17. 03 Jul, 2013 1 commit
  18. 20 May, 2013 1 commit
  19. 23 Apr, 2013 6 commits
    • Henrik Gramner's avatar
      x86: AVX memzero_aligned · 547a6573
      Henrik Gramner authored
    • Henrik Gramner's avatar
      x86: AVX2 high bit-depth predict_16x16_h · 7908dc63
      Henrik Gramner authored
    • Fiona Glaser's avatar
      x86: more AVX2 framework, AVX2 functions, plus some existing asm tweaks · 0ea5be85
      Fiona Glaser authored
      AVX2 functions:
      zigzag interleave
    • Fiona Glaser's avatar
      x86-64: cabac_block_residual assembly · a3f5c732
      Fiona Glaser authored
      RDO: ~20% faster than C
      Bitstream: ~50% faster than C
      1-2% faster overall, highest on preset superfast/fast/medium.
    • Steve Borho's avatar
      OpenCL lookahead · f49a1b2e
      Steve Borho authored
      OpenCL support is compiled in by default, but must be enabled at runtime by an
      --opencl command line flag. Compiling OpenCL support requires perl. To avoid
      the perl requirement use: configure --disable-opencl.
      When enabled, the lookahead thread is mostly off-loaded to an OpenCL capable GPU
      device.  Lowres intra cost prediction, lowres motion search (including subpel)
      and bidir cost predictions are all done on the GPU.  MB-tree and final slice
      decisions are still done by the CPU.  Presets which do not use a threaded
      lookahead will not use OpenCL at all (superfast, ultrafast).
      Because of data dependencies, the GPU must use an iterative motion search which
      performs more total work than the CPU would do, so this is not work efficient
      or power efficient. But if there are spare GPU cycles to spare, it can often
      speed up the encode. Output quality when OpenCL lookahead is enabled is often
      very slightly worse in quality than the CPU quality (because of the same data
      x264 must compile its OpenCL kernels for your device before running them, and in
      order to avoid doing this every run it caches the compiled kernel binary in a
      file named x264_lookahead.clbin (--opencl-clbin FNAME to override).  The cache
      file will be ignored if the device, driver, or OpenCL source are changed.
      x264 will use the first GPU device which supports the required cl_image
      features required by its kernels. Most modern discrete GPUs and all AMD
      integrated GPUs will work.  Intel integrated GPUs (up to IvyBridge) do not
      support those necessary features. Use --opencl-device N to specify a number of
      capable GPUs to skip during device detection.
      Switchable graphics environments (e.g. AMD Enduro) are currently not supported,
      as some have bugs in their OpenCL drivers that cause output to be silently
      Developed by MulticoreWare with support from AMD and Telestream.
    • Fiona Glaser's avatar
  20. 25 Feb, 2013 1 commit
    • Fiona Glaser's avatar
      x86: optimize and clean up predictor checking · 6371c3a5
      Fiona Glaser authored
      Branchlessly handle elimination of candidates in MMX roundclip asm.
      Add a new asm function, similar to roundclip, except without the round part.
      Optimize and organize the C code, and make both subme>=3 and subme<3 consistent.
      Add lots of explanatory comments and try to make things a little more understandable.
      ~5-10% faster with subme>=3, ~15-20% faster with subme<3.
  21. 09 Jan, 2013 1 commit
  22. 18 May, 2012 1 commit
    • Fiona Glaser's avatar
      Threaded lookahead · df700eae
      Fiona Glaser authored
      Split each lookahead frame analysis call into multiple threads.  Has a small
      impact on quality, but does not seem to be consistently any worse.
      This helps alleviate bottlenecks with many cores and frame threads. In many
      case, this massively increases performance on many-core systems.  For example,
      over 100% faster 1080p encoding with --preset veryfast on a 12-core i7 system.
      Realtime 1080p30 at --preset slow should now be feasible on real systems.
      For sliced-threads, this patch should be faster regardless of settings (~10%).
      By default, lookahead threads are 1/6 of regular threads.  This isn't exacting,
      but it seems to work well for all presets on real systems.  With sliced-threads,
      it's the same as the number of encoding threads.
  23. 24 Apr, 2012 1 commit
    • Fiona Glaser's avatar
      Add mb_info API for signalling constant macroblocks · 8e57a9a0
      Fiona Glaser authored
      Some use-cases of x264 involve encoding video with large constant areas of the frame.
      Sometimes, the caller knows which areas these are, and can tell x264.
      This API lets the caller do this and adds internal tracking of modifications to macroblocks to avoid problems.
      This is really only suitable without B-frames.
      An example use-case would be using x264 for VNC.
  24. 27 Mar, 2012 1 commit