Add support for decoding to 565 to libjpeg_turbo

simd/jsimd_x86_64.c

 /*
  * jsimd_x86_64.c
  *
  * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
- * Copyright 2009-2011 D. R. Commander
+ * Copyright 2009-2011, 2014 D. R. Commander
  * 
  * 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
  *
  * This file contains the interface between the "normal" portions
  * of the library and the SIMD implementations when running on a
  * x86_64 architecture.
  */
 
@@ skipping 59 matching lines @@
     return 0;
   if ((RGB_PIXELSIZE != 3) && (RGB_PIXELSIZE != 4))
     return 0;
 
   if (!IS_ALIGNED_SSE(jconst_ycc_rgb_convert_sse2))
     return 0;
 
   return 1;
 }
 
+GLOBAL(int)
+jsimd_can_ycc_rgb565 (void)
+{
+  return 0;
+}
+
 #ifndef JPEG_DECODE_ONLY
 GLOBAL(void)
 jsimd_rgb_ycc_convert (j_compress_ptr cinfo,
                        JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
                        JDIMENSION output_row, int num_rows)
 {
   void (*sse2fct)(JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
 
   switch(cinfo->in_color_space)
   {
@@ skipping 99 matching lines @@
       sse2fct=jsimd_ycc_extxrgb_convert_sse2;
       break;
     default:
       sse2fct=jsimd_ycc_rgb_convert_sse2;
       break;
   }
 
   sse2fct(cinfo->output_width, input_buf, input_row, output_buf, num_rows);
 }
 
+GLOBAL(void)
+jsimd_ycc_rgb565_convert (j_decompress_ptr cinfo,
+                          JSAMPIMAGE input_buf, JDIMENSION input_row,
+                          JSAMPARRAY output_buf, int num_rows)
+{
+}
+
 #ifndef JPEG_DECODE_ONLY
 GLOBAL(int)
 jsimd_can_h2v2_downsample (void)
 {
   /* The code is optimised for these values only */
   if (BITS_IN_JSAMPLE != 8)
     return 0;
   if (sizeof(JDIMENSION) != 4)
     return 0;
 
@@ skipping 537 matching lines @@
 }
 
 GLOBAL(void)
 jsimd_idct_float (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                 JCOEFPTR coef_block, JSAMPARRAY output_buf,
                 JDIMENSION output_col)
 {
   jsimd_idct_float_sse2(compptr->dct_table, coef_block,
                         output_buf, output_col);
 }