kc3-lang/libjpeg-turbo/jsimd.h

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• Hash : f3a8684c
  Author :
  Date : 2016-01-07T00:19:43
  

  SSE2 SIMD implementation of Huffman encoding
  
  Full-color compression speedups relative to libjpeg-turbo 1.4.2:
  
  2.8 GHz Intel Xeon W3530, Linux, 64-bit:  2.2-18% (avg. 9.5%)
  2.8 GHz Intel Xeon W3530, Linux, 32-bit:  10-25% (avg. 17%)
  
  2.3 GHz AMD A10-4600M APU, Linux, 64-bit:  4.9-17% (avg. 11%)
  2.3 GHz AMD A10-4600M APU, Linux, 32-bit:  8.8-19% (avg. 15%)
  
  3.0 GHz Intel Core i7, OS X, 64-bit:  3.5-16% (avg. 10%)
  3.0 GHz Intel Core i7, OS X, 32-bit:  4.8-14% (avg. 11%)
  
  2.6 GHz AMD Athlon 64 X2 5050e:
  Performance-neutral (give or take a few percent)
  
  Full-color compression speedups relative to IPP:
  
  2.8 GHz Intel Xeon W3530, Linux, 64-bit:  4.8-34% (avg. 19%)
  2.8 GHz Intel Xeon W3530, Linux, 32-bit:  -19%-7.0% (avg. -7.0%)
  
  Refer to #42 for discussion.  Numerous other approaches were attempted,
  but this one proved to be the most performant across all platforms.
  
  This commit also fixes #3 (works around, really-- the clang-compiled version
  of jchuff.c still performs 20% worse than its GCC-compiled counterpart, but
  that code is now bypassed by the new SSE2 Huffman algorithm.)
  
  Based on:
  https://github.com/mayeut/libjpeg-turbo/commit/2cb4d41330e1edc4469f6b97ba73b73abfbeb02f
  https://github.com/mayeut/libjpeg-turbo/commit/36c94e050d117912adbff9fbcc6fe307df240168
  

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• jsimd.h

• /*
   * jsimd.h
   *
   * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
   * Copyright 2011, 2014 D. R. Commander
   * Copyright 2015 Matthieu Darbois
   *
   * Based on the x86 SIMD extension for IJG JPEG library,
   * Copyright (C) 1999-2006, MIYASAKA Masaru.
   * For conditions of distribution and use, see copyright notice in jsimdext.inc
   *
   */
  
  #include "jchuff.h"             /* Declarations shared with jcphuff.c */
  
  EXTERN(int) jsimd_can_rgb_ycc (void);
  EXTERN(int) jsimd_can_rgb_gray (void);
  EXTERN(int) jsimd_can_ycc_rgb (void);
  EXTERN(int) jsimd_can_ycc_rgb565 (void);
  EXTERN(int) jsimd_c_can_null_convert (void);
  
  EXTERN(void) jsimd_rgb_ycc_convert
          (j_compress_ptr cinfo, JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
           JDIMENSION output_row, int num_rows);
  EXTERN(void) jsimd_rgb_gray_convert
          (j_compress_ptr cinfo, JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
           JDIMENSION output_row, int num_rows);
  EXTERN(void) jsimd_ycc_rgb_convert
          (j_decompress_ptr cinfo, JSAMPIMAGE input_buf, JDIMENSION input_row,
           JSAMPARRAY output_buf, int num_rows);
  EXTERN(void) jsimd_ycc_rgb565_convert
          (j_decompress_ptr cinfo, JSAMPIMAGE input_buf, JDIMENSION input_row,
           JSAMPARRAY output_buf, int num_rows);
  EXTERN(void) jsimd_c_null_convert
          (j_compress_ptr cinfo, JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
           JDIMENSION output_row, int num_rows);
  
  EXTERN(int) jsimd_can_h2v2_downsample (void);
  EXTERN(int) jsimd_can_h2v1_downsample (void);
  
  EXTERN(void) jsimd_h2v2_downsample
          (j_compress_ptr cinfo, jpeg_component_info * compptr,
           JSAMPARRAY input_data, JSAMPARRAY output_data);
  
  EXTERN(int) jsimd_can_h2v2_smooth_downsample (void);
  
  EXTERN(void) jsimd_h2v2_smooth_downsample
          (j_compress_ptr cinfo, jpeg_component_info * compptr,
           JSAMPARRAY input_data, JSAMPARRAY output_data);
  
  EXTERN(void) jsimd_h2v1_downsample
          (j_compress_ptr cinfo, jpeg_component_info * compptr,
          JSAMPARRAY input_data, JSAMPARRAY output_data);
  
  EXTERN(int) jsimd_can_h2v2_upsample (void);
  EXTERN(int) jsimd_can_h2v1_upsample (void);
  EXTERN(int) jsimd_can_int_upsample (void);
  
  EXTERN(void) jsimd_h2v2_upsample
          (j_decompress_ptr cinfo, jpeg_component_info * compptr,
           JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr);
  EXTERN(void) jsimd_h2v1_upsample
          (j_decompress_ptr cinfo, jpeg_component_info * compptr,
           JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr);
  EXTERN(void) jsimd_int_upsample
          (j_decompress_ptr cinfo, jpeg_component_info * compptr,
           JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr);
  
  EXTERN(int) jsimd_can_h2v2_fancy_upsample (void);
  EXTERN(int) jsimd_can_h2v1_fancy_upsample (void);
  
  EXTERN(void) jsimd_h2v2_fancy_upsample
          (j_decompress_ptr cinfo, jpeg_component_info * compptr,
           JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr);
  EXTERN(void) jsimd_h2v1_fancy_upsample
          (j_decompress_ptr cinfo, jpeg_component_info * compptr,
           JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr);
  
  EXTERN(int) jsimd_can_h2v2_merged_upsample (void);
  EXTERN(int) jsimd_can_h2v1_merged_upsample (void);
  
  EXTERN(void) jsimd_h2v2_merged_upsample
          (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
           JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf);
  EXTERN(void) jsimd_h2v1_merged_upsample
          (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
           JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf);
  
  EXTERN(int) jsimd_can_huff_encode_one_block (void);
  
  EXTERN(JOCTET*) jsimd_huff_encode_one_block
          (void * state, JOCTET *buffer, JCOEFPTR block, int last_dc_val,
           c_derived_tbl *dctbl, c_derived_tbl *actbl);
  

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