| /* |
| * jdmerge.c |
| * |
| * This file was part of the Independent JPEG Group's software: |
| * Copyright (C) 1994-1996, Thomas G. Lane. |
| * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB |
| * libjpeg-turbo Modifications: |
| * Copyright (C) 2009, 2011, 2014-2015, D. R. Commander. |
| * Copyright (C) 2013, Linaro Limited. |
| * For conditions of distribution and use, see the accompanying README.ijg |
| * file. |
| * |
| * This file contains code for merged upsampling/color conversion. |
| * |
| * This file combines functions from jdsample.c and jdcolor.c; |
| * read those files first to understand what's going on. |
| * |
| * When the chroma components are to be upsampled by simple replication |
| * (ie, box filtering), we can save some work in color conversion by |
| * calculating all the output pixels corresponding to a pair of chroma |
| * samples at one time. In the conversion equations |
| * R = Y + K1 * Cr |
| * G = Y + K2 * Cb + K3 * Cr |
| * B = Y + K4 * Cb |
| * only the Y term varies among the group of pixels corresponding to a pair |
| * of chroma samples, so the rest of the terms can be calculated just once. |
| * At typical sampling ratios, this eliminates half or three-quarters of the |
| * multiplications needed for color conversion. |
| * |
| * This file currently provides implementations for the following cases: |
| * YCbCr => RGB color conversion only. |
| * Sampling ratios of 2h1v or 2h2v. |
| * No scaling needed at upsample time. |
| * Corner-aligned (non-CCIR601) sampling alignment. |
| * Other special cases could be added, but in most applications these are |
| * the only common cases. (For uncommon cases we fall back on the more |
| * general code in jdsample.c and jdcolor.c.) |
| */ |
| |
| #define JPEG_INTERNALS |
| #include "jinclude.h" |
| #include "jpeglib.h" |
| #include "jsimd.h" |
| #include "jconfigint.h" |
| |
| #ifdef UPSAMPLE_MERGING_SUPPORTED |
| |
| |
| /* Private subobject */ |
| |
| typedef struct { |
| struct jpeg_upsampler pub; /* public fields */ |
| |
| /* Pointer to routine to do actual upsampling/conversion of one row group */ |
| void (*upmethod) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf, |
| JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf); |
| |
| /* Private state for YCC->RGB conversion */ |
| int * Cr_r_tab; /* => table for Cr to R conversion */ |
| int * Cb_b_tab; /* => table for Cb to B conversion */ |
| JLONG * Cr_g_tab; /* => table for Cr to G conversion */ |
| JLONG * Cb_g_tab; /* => table for Cb to G conversion */ |
| |
| /* For 2:1 vertical sampling, we produce two output rows at a time. |
| * We need a "spare" row buffer to hold the second output row if the |
| * application provides just a one-row buffer; we also use the spare |
| * to discard the dummy last row if the image height is odd. |
| */ |
| JSAMPROW spare_row; |
| boolean spare_full; /* T if spare buffer is occupied */ |
| |
| JDIMENSION out_row_width; /* samples per output row */ |
| JDIMENSION rows_to_go; /* counts rows remaining in image */ |
| } my_upsampler; |
| |
| typedef my_upsampler * my_upsample_ptr; |
| |
| #define SCALEBITS 16 /* speediest right-shift on some machines */ |
| #define ONE_HALF ((JLONG) 1 << (SCALEBITS-1)) |
| #define FIX(x) ((JLONG) ((x) * (1L<<SCALEBITS) + 0.5)) |
| |
| |
| /* Include inline routines for colorspace extensions */ |
| |
| #include "jdmrgext.c" |
| #undef RGB_RED |
| #undef RGB_GREEN |
| #undef RGB_BLUE |
| #undef RGB_PIXELSIZE |
| |
| #define RGB_RED EXT_RGB_RED |
| #define RGB_GREEN EXT_RGB_GREEN |
| #define RGB_BLUE EXT_RGB_BLUE |
| #define RGB_PIXELSIZE EXT_RGB_PIXELSIZE |
| #define h2v1_merged_upsample_internal extrgb_h2v1_merged_upsample_internal |
| #define h2v2_merged_upsample_internal extrgb_h2v2_merged_upsample_internal |
| #include "jdmrgext.c" |
| #undef RGB_RED |
| #undef RGB_GREEN |
| #undef RGB_BLUE |
| #undef RGB_PIXELSIZE |
| #undef h2v1_merged_upsample_internal |
| #undef h2v2_merged_upsample_internal |
| |
| #define RGB_RED EXT_RGBX_RED |
| #define RGB_GREEN EXT_RGBX_GREEN |
| #define RGB_BLUE EXT_RGBX_BLUE |
| #define RGB_ALPHA 3 |
| #define RGB_PIXELSIZE EXT_RGBX_PIXELSIZE |
| #define h2v1_merged_upsample_internal extrgbx_h2v1_merged_upsample_internal |
| #define h2v2_merged_upsample_internal extrgbx_h2v2_merged_upsample_internal |
| #include "jdmrgext.c" |
| #undef RGB_RED |
| #undef RGB_GREEN |
| #undef RGB_BLUE |
| #undef RGB_ALPHA |
| #undef RGB_PIXELSIZE |
| #undef h2v1_merged_upsample_internal |
| #undef h2v2_merged_upsample_internal |
| |
| #define RGB_RED EXT_BGR_RED |
| #define RGB_GREEN EXT_BGR_GREEN |
| #define RGB_BLUE EXT_BGR_BLUE |
| #define RGB_PIXELSIZE EXT_BGR_PIXELSIZE |
| #define h2v1_merged_upsample_internal extbgr_h2v1_merged_upsample_internal |
| #define h2v2_merged_upsample_internal extbgr_h2v2_merged_upsample_internal |
| #include "jdmrgext.c" |
| #undef RGB_RED |
| #undef RGB_GREEN |
| #undef RGB_BLUE |
| #undef RGB_PIXELSIZE |
| #undef h2v1_merged_upsample_internal |
| #undef h2v2_merged_upsample_internal |
| |
| #define RGB_RED EXT_BGRX_RED |
| #define RGB_GREEN EXT_BGRX_GREEN |
| #define RGB_BLUE EXT_BGRX_BLUE |
| #define RGB_ALPHA 3 |
| #define RGB_PIXELSIZE EXT_BGRX_PIXELSIZE |
| #define h2v1_merged_upsample_internal extbgrx_h2v1_merged_upsample_internal |
| #define h2v2_merged_upsample_internal extbgrx_h2v2_merged_upsample_internal |
| #include "jdmrgext.c" |
| #undef RGB_RED |
| #undef RGB_GREEN |
| #undef RGB_BLUE |
| #undef RGB_ALPHA |
| #undef RGB_PIXELSIZE |
| #undef h2v1_merged_upsample_internal |
| #undef h2v2_merged_upsample_internal |
| |
| #define RGB_RED EXT_XBGR_RED |
| #define RGB_GREEN EXT_XBGR_GREEN |
| #define RGB_BLUE EXT_XBGR_BLUE |
| #define RGB_ALPHA 0 |
| #define RGB_PIXELSIZE EXT_XBGR_PIXELSIZE |
| #define h2v1_merged_upsample_internal extxbgr_h2v1_merged_upsample_internal |
| #define h2v2_merged_upsample_internal extxbgr_h2v2_merged_upsample_internal |
| #include "jdmrgext.c" |
| #undef RGB_RED |
| #undef RGB_GREEN |
| #undef RGB_BLUE |
| #undef RGB_ALPHA |
| #undef RGB_PIXELSIZE |
| #undef h2v1_merged_upsample_internal |
| #undef h2v2_merged_upsample_internal |
| |
| #define RGB_RED EXT_XRGB_RED |
| #define RGB_GREEN EXT_XRGB_GREEN |
| #define RGB_BLUE EXT_XRGB_BLUE |
| #define RGB_ALPHA 0 |
| #define RGB_PIXELSIZE EXT_XRGB_PIXELSIZE |
| #define h2v1_merged_upsample_internal extxrgb_h2v1_merged_upsample_internal |
| #define h2v2_merged_upsample_internal extxrgb_h2v2_merged_upsample_internal |
| #include "jdmrgext.c" |
| #undef RGB_RED |
| #undef RGB_GREEN |
| #undef RGB_BLUE |
| #undef RGB_ALPHA |
| #undef RGB_PIXELSIZE |
| #undef h2v1_merged_upsample_internal |
| #undef h2v2_merged_upsample_internal |
| |
| |
| /* |
| * Initialize tables for YCC->RGB colorspace conversion. |
| * This is taken directly from jdcolor.c; see that file for more info. |
| */ |
| |
| LOCAL(void) |
| build_ycc_rgb_table (j_decompress_ptr cinfo) |
| { |
| my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; |
| int i; |
| JLONG x; |
| SHIFT_TEMPS |
| |
| upsample->Cr_r_tab = (int *) |
| (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
| (MAXJSAMPLE+1) * sizeof(int)); |
| upsample->Cb_b_tab = (int *) |
| (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
| (MAXJSAMPLE+1) * sizeof(int)); |
| upsample->Cr_g_tab = (JLONG *) |
| (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
| (MAXJSAMPLE+1) * sizeof(JLONG)); |
| upsample->Cb_g_tab = (JLONG *) |
| (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
| (MAXJSAMPLE+1) * sizeof(JLONG)); |
| |
| for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) { |
| /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */ |
| /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */ |
| /* Cr=>R value is nearest int to 1.40200 * x */ |
| upsample->Cr_r_tab[i] = (int) |
| RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS); |
| /* Cb=>B value is nearest int to 1.77200 * x */ |
| upsample->Cb_b_tab[i] = (int) |
| RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS); |
| /* Cr=>G value is scaled-up -0.71414 * x */ |
| upsample->Cr_g_tab[i] = (- FIX(0.71414)) * x; |
| /* Cb=>G value is scaled-up -0.34414 * x */ |
| /* We also add in ONE_HALF so that need not do it in inner loop */ |
| upsample->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF; |
| } |
| } |
| |
| |
| /* |
| * Initialize for an upsampling pass. |
| */ |
| |
| METHODDEF(void) |
| start_pass_merged_upsample (j_decompress_ptr cinfo) |
| { |
| my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; |
| |
| /* Mark the spare buffer empty */ |
| upsample->spare_full = FALSE; |
| /* Initialize total-height counter for detecting bottom of image */ |
| upsample->rows_to_go = cinfo->output_height; |
| } |
| |
| |
| /* |
| * Control routine to do upsampling (and color conversion). |
| * |
| * The control routine just handles the row buffering considerations. |
| */ |
| |
| METHODDEF(void) |
| merged_2v_upsample (j_decompress_ptr cinfo, |
| JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, |
| JDIMENSION in_row_groups_avail, |
| JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, |
| JDIMENSION out_rows_avail) |
| /* 2:1 vertical sampling case: may need a spare row. */ |
| { |
| my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; |
| JSAMPROW work_ptrs[2]; |
| JDIMENSION num_rows; /* number of rows returned to caller */ |
| |
| if (upsample->spare_full) { |
| /* If we have a spare row saved from a previous cycle, just return it. */ |
| JDIMENSION size = upsample->out_row_width; |
| if (cinfo->out_color_space == JCS_RGB565) |
| size = cinfo->output_width * 2; |
| jcopy_sample_rows(& upsample->spare_row, 0, output_buf + *out_row_ctr, 0, |
| 1, size); |
| num_rows = 1; |
| upsample->spare_full = FALSE; |
| } else { |
| /* Figure number of rows to return to caller. */ |
| num_rows = 2; |
| /* Not more than the distance to the end of the image. */ |
| if (num_rows > upsample->rows_to_go) |
| num_rows = upsample->rows_to_go; |
| /* And not more than what the client can accept: */ |
| out_rows_avail -= *out_row_ctr; |
| if (num_rows > out_rows_avail) |
| num_rows = out_rows_avail; |
| /* Create output pointer array for upsampler. */ |
| work_ptrs[0] = output_buf[*out_row_ctr]; |
| if (num_rows > 1) { |
| work_ptrs[1] = output_buf[*out_row_ctr + 1]; |
| } else { |
| work_ptrs[1] = upsample->spare_row; |
| upsample->spare_full = TRUE; |
| } |
| /* Now do the upsampling. */ |
| (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr, work_ptrs); |
| } |
| |
| /* Adjust counts */ |
| *out_row_ctr += num_rows; |
| upsample->rows_to_go -= num_rows; |
| /* When the buffer is emptied, declare this input row group consumed */ |
| if (! upsample->spare_full) |
| (*in_row_group_ctr)++; |
| } |
| |
| |
| METHODDEF(void) |
| merged_1v_upsample (j_decompress_ptr cinfo, |
| JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, |
| JDIMENSION in_row_groups_avail, |
| JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, |
| JDIMENSION out_rows_avail) |
| /* 1:1 vertical sampling case: much easier, never need a spare row. */ |
| { |
| my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; |
| |
| /* Just do the upsampling. */ |
| (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr, |
| output_buf + *out_row_ctr); |
| /* Adjust counts */ |
| (*out_row_ctr)++; |
| (*in_row_group_ctr)++; |
| } |
| |
| |
| /* |
| * These are the routines invoked by the control routines to do |
| * the actual upsampling/conversion. One row group is processed per call. |
| * |
| * Note: since we may be writing directly into application-supplied buffers, |
| * we have to be honest about the output width; we can't assume the buffer |
| * has been rounded up to an even width. |
| */ |
| |
| |
| /* |
| * Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical. |
| */ |
| |
| METHODDEF(void) |
| h2v1_merged_upsample (j_decompress_ptr cinfo, |
| JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr, |
| JSAMPARRAY output_buf) |
| { |
| switch (cinfo->out_color_space) { |
| case JCS_EXT_RGB: |
| extrgb_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| case JCS_EXT_RGBX: |
| case JCS_EXT_RGBA: |
| extrgbx_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| case JCS_EXT_BGR: |
| extbgr_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| case JCS_EXT_BGRX: |
| case JCS_EXT_BGRA: |
| extbgrx_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| case JCS_EXT_XBGR: |
| case JCS_EXT_ABGR: |
| extxbgr_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| case JCS_EXT_XRGB: |
| case JCS_EXT_ARGB: |
| extxrgb_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| default: |
| h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| } |
| } |
| |
| |
| /* |
| * Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical. |
| */ |
| |
| METHODDEF(void) |
| h2v2_merged_upsample (j_decompress_ptr cinfo, |
| JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr, |
| JSAMPARRAY output_buf) |
| { |
| switch (cinfo->out_color_space) { |
| case JCS_EXT_RGB: |
| extrgb_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| case JCS_EXT_RGBX: |
| case JCS_EXT_RGBA: |
| extrgbx_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| case JCS_EXT_BGR: |
| extbgr_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| case JCS_EXT_BGRX: |
| case JCS_EXT_BGRA: |
| extbgrx_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| case JCS_EXT_XBGR: |
| case JCS_EXT_ABGR: |
| extxbgr_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| case JCS_EXT_XRGB: |
| case JCS_EXT_ARGB: |
| extxrgb_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| default: |
| h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| break; |
| } |
| } |
| |
| |
| /* |
| * RGB565 conversion |
| */ |
| |
| #define PACK_SHORT_565_LE(r, g, b) ((((r) << 8) & 0xF800) | \ |
| (((g) << 3) & 0x7E0) | ((b) >> 3)) |
| #define PACK_SHORT_565_BE(r, g, b) (((r) & 0xF8) | ((g) >> 5) | \ |
| (((g) << 11) & 0xE000) | \ |
| (((b) << 5) & 0x1F00)) |
| |
| #define PACK_TWO_PIXELS_LE(l, r) ((r << 16) | l) |
| #define PACK_TWO_PIXELS_BE(l, r) ((l << 16) | r) |
| |
| #define PACK_NEED_ALIGNMENT(ptr) (((size_t)(ptr)) & 3) |
| |
| #define WRITE_TWO_PIXELS_LE(addr, pixels) { \ |
| ((INT16*)(addr))[0] = (INT16)(pixels); \ |
| ((INT16*)(addr))[1] = (INT16)((pixels) >> 16); \ |
| } |
| #define WRITE_TWO_PIXELS_BE(addr, pixels) { \ |
| ((INT16*)(addr))[1] = (INT16)(pixels); \ |
| ((INT16*)(addr))[0] = (INT16)((pixels) >> 16); \ |
| } |
| |
| #define DITHER_565_R(r, dither) ((r) + ((dither) & 0xFF)) |
| #define DITHER_565_G(g, dither) ((g) + (((dither) & 0xFF) >> 1)) |
| #define DITHER_565_B(b, dither) ((b) + ((dither) & 0xFF)) |
| |
| |
| /* Declarations for ordered dithering |
| * |
| * We use a 4x4 ordered dither array packed into 32 bits. This array is |
| * sufficent for dithering RGB888 to RGB565. |
| */ |
| |
| #define DITHER_MASK 0x3 |
| #define DITHER_ROTATE(x) ((((x) & 0xFF) << 24) | (((x) >> 8) & 0x00FFFFFF)) |
| static const JLONG dither_matrix[4] = { |
| 0x0008020A, |
| 0x0C040E06, |
| 0x030B0109, |
| 0x0F070D05 |
| }; |
| |
| |
| /* Include inline routines for RGB565 conversion */ |
| |
| #define PACK_SHORT_565 PACK_SHORT_565_LE |
| #define PACK_TWO_PIXELS PACK_TWO_PIXELS_LE |
| #define WRITE_TWO_PIXELS WRITE_TWO_PIXELS_LE |
| #define h2v1_merged_upsample_565_internal h2v1_merged_upsample_565_le |
| #define h2v1_merged_upsample_565D_internal h2v1_merged_upsample_565D_le |
| #define h2v2_merged_upsample_565_internal h2v2_merged_upsample_565_le |
| #define h2v2_merged_upsample_565D_internal h2v2_merged_upsample_565D_le |
| #include "jdmrg565.c" |
| #undef PACK_SHORT_565 |
| #undef PACK_TWO_PIXELS |
| #undef WRITE_TWO_PIXELS |
| #undef h2v1_merged_upsample_565_internal |
| #undef h2v1_merged_upsample_565D_internal |
| #undef h2v2_merged_upsample_565_internal |
| #undef h2v2_merged_upsample_565D_internal |
| |
| #define PACK_SHORT_565 PACK_SHORT_565_BE |
| #define PACK_TWO_PIXELS PACK_TWO_PIXELS_BE |
| #define WRITE_TWO_PIXELS WRITE_TWO_PIXELS_BE |
| #define h2v1_merged_upsample_565_internal h2v1_merged_upsample_565_be |
| #define h2v1_merged_upsample_565D_internal h2v1_merged_upsample_565D_be |
| #define h2v2_merged_upsample_565_internal h2v2_merged_upsample_565_be |
| #define h2v2_merged_upsample_565D_internal h2v2_merged_upsample_565D_be |
| #include "jdmrg565.c" |
| #undef PACK_SHORT_565 |
| #undef PACK_TWO_PIXELS |
| #undef WRITE_TWO_PIXELS |
| #undef h2v1_merged_upsample_565_internal |
| #undef h2v1_merged_upsample_565D_internal |
| #undef h2v2_merged_upsample_565_internal |
| #undef h2v2_merged_upsample_565D_internal |
| |
| |
| static INLINE boolean is_big_endian(void) |
| { |
| int test_value = 1; |
| if(*(char *)&test_value != 1) |
| return TRUE; |
| return FALSE; |
| } |
| |
| |
| METHODDEF(void) |
| h2v1_merged_upsample_565 (j_decompress_ptr cinfo, |
| JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr, |
| JSAMPARRAY output_buf) |
| { |
| if (is_big_endian()) |
| h2v1_merged_upsample_565_be(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| else |
| h2v1_merged_upsample_565_le(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| } |
| |
| |
| METHODDEF(void) |
| h2v1_merged_upsample_565D (j_decompress_ptr cinfo, |
| JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr, |
| JSAMPARRAY output_buf) |
| { |
| if (is_big_endian()) |
| h2v1_merged_upsample_565D_be(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| else |
| h2v1_merged_upsample_565D_le(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| } |
| |
| |
| METHODDEF(void) |
| h2v2_merged_upsample_565 (j_decompress_ptr cinfo, |
| JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr, |
| JSAMPARRAY output_buf) |
| { |
| if (is_big_endian()) |
| h2v2_merged_upsample_565_be(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| else |
| h2v2_merged_upsample_565_le(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| } |
| |
| |
| METHODDEF(void) |
| h2v2_merged_upsample_565D (j_decompress_ptr cinfo, |
| JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr, |
| JSAMPARRAY output_buf) |
| { |
| if (is_big_endian()) |
| h2v2_merged_upsample_565D_be(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| else |
| h2v2_merged_upsample_565D_le(cinfo, input_buf, in_row_group_ctr, |
| output_buf); |
| } |
| |
| |
| /* |
| * Module initialization routine for merged upsampling/color conversion. |
| * |
| * NB: this is called under the conditions determined by use_merged_upsample() |
| * in jdmaster.c. That routine MUST correspond to the actual capabilities |
| * of this module; no safety checks are made here. |
| */ |
| |
| GLOBAL(void) |
| jinit_merged_upsampler (j_decompress_ptr cinfo) |
| { |
| my_upsample_ptr upsample; |
| |
| upsample = (my_upsample_ptr) |
| (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
| sizeof(my_upsampler)); |
| cinfo->upsample = (struct jpeg_upsampler *) upsample; |
| upsample->pub.start_pass = start_pass_merged_upsample; |
| upsample->pub.need_context_rows = FALSE; |
| |
| upsample->out_row_width = cinfo->output_width * cinfo->out_color_components; |
| |
| if (cinfo->max_v_samp_factor == 2) { |
| upsample->pub.upsample = merged_2v_upsample; |
| if (jsimd_can_h2v2_merged_upsample()) |
| upsample->upmethod = jsimd_h2v2_merged_upsample; |
| else |
| upsample->upmethod = h2v2_merged_upsample; |
| if (cinfo->out_color_space == JCS_RGB565) { |
| if (cinfo->dither_mode != JDITHER_NONE) { |
| upsample->upmethod = h2v2_merged_upsample_565D; |
| } else { |
| upsample->upmethod = h2v2_merged_upsample_565; |
| } |
| } |
| /* Allocate a spare row buffer */ |
| upsample->spare_row = (JSAMPROW) |
| (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
| (size_t) (upsample->out_row_width * sizeof(JSAMPLE))); |
| } else { |
| upsample->pub.upsample = merged_1v_upsample; |
| if (jsimd_can_h2v1_merged_upsample()) |
| upsample->upmethod = jsimd_h2v1_merged_upsample; |
| else |
| upsample->upmethod = h2v1_merged_upsample; |
| if (cinfo->out_color_space == JCS_RGB565) { |
| if (cinfo->dither_mode != JDITHER_NONE) { |
| upsample->upmethod = h2v1_merged_upsample_565D; |
| } else { |
| upsample->upmethod = h2v1_merged_upsample_565; |
| } |
| } |
| /* No spare row needed */ |
| upsample->spare_row = NULL; |
| } |
| |
| build_ycc_rgb_table(cinfo); |
| } |
| |
| #endif /* UPSAMPLE_MERGING_SUPPORTED */ |
