Add support for decoding to 565 to libjpeg_turbo

simd/jsimd_arm.c

 /*
  * jsimd_arm.c
  *
  * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
- * Copyright 2009-2011 D. R. Commander
+ * Copyright 2009-2011, 2013-2014D. 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
  * ARM architecture.
  *
  * Based on the stubs from 'jsimd_none.c'
@@ skipping 153 matching lines @@
   if (sizeof(JDIMENSION) != 4)
     return 0;
   if ((RGB_PIXELSIZE != 3) && (RGB_PIXELSIZE != 4))
     return 0;
   if (simd_support & JSIMD_ARM_NEON)
     return 1;
 
   return 0;
 }
 
+GLOBAL(int)
+jsimd_can_ycc_rgb565 (void)
+{
+  init_simd();
+
+  /* The code is optimised for these values only */
+  if (BITS_IN_JSAMPLE != 8)
+    return 0;
+  if (sizeof(JDIMENSION) != 4)
+    return 0;
+
+  if (simd_support & JSIMD_ARM_NEON)
+    return 1;
+
+  return 0;
+}
+
 GLOBAL(void)
 jsimd_rgb_ycc_convert (j_compress_ptr cinfo,
                        JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
                        JDIMENSION output_row, int num_rows)
 {
   void (*neonfct)(JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
 
   switch(cinfo->in_color_space)
   {
     case JCS_EXT_RGB:
@@ skipping 59 matching lines @@
       neonfct=jsimd_ycc_extbgrx_convert_neon;
       break;
     case JCS_EXT_XBGR:
     case JCS_EXT_ABGR:
       neonfct=jsimd_ycc_extxbgr_convert_neon;
       break;
     case JCS_EXT_XRGB:
     case JCS_EXT_ARGB:
       neonfct=jsimd_ycc_extxrgb_convert_neon;
       break;
-  default:
+    default:
       neonfct=jsimd_ycc_extrgb_convert_neon;
       break;
   }
 
   if (simd_support & JSIMD_ARM_NEON)
     neonfct(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)
+{
+  if (simd_support & JSIMD_ARM_NEON)
+    jsimd_ycc_rgb565_convert_neon(cinfo->output_width, input_buf, input_row,
+                                  output_buf, num_rows);
+}
+
 GLOBAL(int)
 jsimd_can_h2v2_downsample (void)
 {
   init_simd();
 
   return 0;
 }
 
 GLOBAL(int)
 jsimd_can_h2v1_downsample (void)
@@ skipping 395 matching lines @@
     jsimd_idct_ifast_neon(compptr->dct_table, coef_block, output_buf, output_col);
 }
 
 GLOBAL(void)
 jsimd_idct_float (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                 JCOEFPTR coef_block, JSAMPARRAY output_buf,
                 JDIMENSION output_col)
 {
 }