Add support for decoding to 565 to libjpeg_turbo

simd/jsimd_i386.c

 /*
  * jsimd_i386.c
  *
  * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
- * Copyright 2009-2011 D. R. Commander
+ * Copyright 2009-2011, 2013-2014 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
  * 32-bit x86 architecture.
  */
 
@@ skipping 106 matching lines @@
 
   if ((simd_support & JSIMD_SSE2) &&
       IS_ALIGNED_SSE(jconst_ycc_rgb_convert_sse2))
     return 1;
   if (simd_support & JSIMD_MMX)
     return 1;
 
   return 0;
 }
 
+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);
   void (*mmxfct)(JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
 
   switch(cinfo->in_color_space)
@@ skipping 36 matching lines @@
       IS_ALIGNED_SSE(jconst_rgb_ycc_convert_sse2))
     sse2fct(cinfo->image_width, input_buf,
         output_buf, output_row, num_rows);
   else if (simd_support & JSIMD_MMX)
     mmxfct(cinfo->image_width, input_buf,
         output_buf, output_row, num_rows);
 }
 #endif
 
 GLOBAL(void)
+jsimd_ycc_rgb565_convert (j_decompress_ptr cinfo,
+                          JSAMPIMAGE input_buf, JDIMENSION input_row,
+                          JSAMPARRAY output_buf, int num_rows)
+{
+}
+
+GLOBAL(void)
 jsimd_rgb_gray_convert (j_compress_ptr cinfo,
                         JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
                         JDIMENSION output_row, int num_rows)
 {
   void (*sse2fct)(JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
   void (*mmxfct)(JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
 
   switch(cinfo->in_color_space)
   {
     case JCS_EXT_RGB:
@@ skipping 848 matching lines @@
   if ((simd_support & JSIMD_SSE2) && IS_ALIGNED_SSE(jconst_idct_float_sse2))
     jsimd_idct_float_sse2(compptr->dct_table, coef_block,
         output_buf, output_col);
   else if ((simd_support & JSIMD_SSE) && IS_ALIGNED_SSE(jconst_idct_float_sse))
     jsimd_idct_float_sse(compptr->dct_table, coef_block,
         output_buf, output_col);
   else if (simd_support & JSIMD_3DNOW)
     jsimd_idct_float_3dnow(compptr->dct_table, coef_block,
         output_buf, output_col);
 }