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Update code to v1.0.14 (10)
This commit is contained in:
Caten
374
android/extern/libjpeg-turbo/simd/arm/jdcolext-neon.c
vendored
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374
android/extern/libjpeg-turbo/simd/arm/jdcolext-neon.c
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@@ -0,0 +1,374 @@
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/*
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* jdcolext-neon.c - colorspace conversion (Arm Neon)
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*
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* Copyright (C) 2020, Arm Limited. All Rights Reserved.
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* Copyright (C) 2020, D. R. Commander. All Rights Reserved.
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*/
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/* This file is included by jdcolor-neon.c. */
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/* YCbCr -> RGB conversion is defined by the following equations:
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* R = Y + 1.40200 * (Cr - 128)
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* G = Y - 0.34414 * (Cb - 128) - 0.71414 * (Cr - 128)
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* B = Y + 1.77200 * (Cb - 128)
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*
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* Scaled integer constants are used to avoid floating-point arithmetic:
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* 0.3441467 = 11277 * 2^-15
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* 0.7141418 = 23401 * 2^-15
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* 1.4020386 = 22971 * 2^-14
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* 1.7720337 = 29033 * 2^-14
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* These constants are defined in jdcolor-neon.c.
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*
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* To ensure correct results, rounding is used when descaling.
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*/
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/* Notes on safe memory access for YCbCr -> RGB conversion routines:
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*
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* Input memory buffers can be safely overread up to the next multiple of
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* ALIGN_SIZE bytes, since they are always allocated by alloc_sarray() in
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* jmemmgr.c.
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*
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* The output buffer cannot safely be written beyond output_width, since
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* output_buf points to a possibly unpadded row in the decompressed image
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* buffer allocated by the calling program.
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*/
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void jsimd_ycc_rgb_convert_neon(JDIMENSION output_width, JSAMPIMAGE input_buf,
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JDIMENSION input_row, JSAMPARRAY output_buf,
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int num_rows)
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{
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JSAMPROW outptr;
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/* Pointers to Y, Cb, and Cr data */
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JSAMPROW inptr0, inptr1, inptr2;
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const int16x4_t consts = vld1_s16(jsimd_ycc_rgb_convert_neon_consts);
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const int16x8_t neg_128 = vdupq_n_s16(-128);
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while (--num_rows >= 0) {
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inptr0 = input_buf[0][input_row];
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inptr1 = input_buf[1][input_row];
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inptr2 = input_buf[2][input_row];
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input_row++;
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outptr = *output_buf++;
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int cols_remaining = output_width;
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for (; cols_remaining >= 16; cols_remaining -= 16) {
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uint8x16_t y = vld1q_u8(inptr0);
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uint8x16_t cb = vld1q_u8(inptr1);
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uint8x16_t cr = vld1q_u8(inptr2);
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/* Subtract 128 from Cb and Cr. */
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int16x8_t cr_128_l =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(neg_128),
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vget_low_u8(cr)));
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int16x8_t cr_128_h =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(neg_128),
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vget_high_u8(cr)));
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int16x8_t cb_128_l =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(neg_128),
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vget_low_u8(cb)));
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int16x8_t cb_128_h =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(neg_128),
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vget_high_u8(cb)));
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/* Compute G-Y: - 0.34414 * (Cb - 128) - 0.71414 * (Cr - 128) */
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int32x4_t g_sub_y_ll = vmull_lane_s16(vget_low_s16(cb_128_l), consts, 0);
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int32x4_t g_sub_y_lh = vmull_lane_s16(vget_high_s16(cb_128_l),
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consts, 0);
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int32x4_t g_sub_y_hl = vmull_lane_s16(vget_low_s16(cb_128_h), consts, 0);
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int32x4_t g_sub_y_hh = vmull_lane_s16(vget_high_s16(cb_128_h),
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consts, 0);
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g_sub_y_ll = vmlsl_lane_s16(g_sub_y_ll, vget_low_s16(cr_128_l),
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consts, 1);
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g_sub_y_lh = vmlsl_lane_s16(g_sub_y_lh, vget_high_s16(cr_128_l),
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consts, 1);
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g_sub_y_hl = vmlsl_lane_s16(g_sub_y_hl, vget_low_s16(cr_128_h),
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consts, 1);
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g_sub_y_hh = vmlsl_lane_s16(g_sub_y_hh, vget_high_s16(cr_128_h),
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consts, 1);
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/* Descale G components: shift right 15, round, and narrow to 16-bit. */
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int16x8_t g_sub_y_l = vcombine_s16(vrshrn_n_s32(g_sub_y_ll, 15),
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vrshrn_n_s32(g_sub_y_lh, 15));
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int16x8_t g_sub_y_h = vcombine_s16(vrshrn_n_s32(g_sub_y_hl, 15),
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vrshrn_n_s32(g_sub_y_hh, 15));
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/* Compute R-Y: 1.40200 * (Cr - 128) */
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int16x8_t r_sub_y_l = vqrdmulhq_lane_s16(vshlq_n_s16(cr_128_l, 1),
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consts, 2);
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int16x8_t r_sub_y_h = vqrdmulhq_lane_s16(vshlq_n_s16(cr_128_h, 1),
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consts, 2);
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/* Compute B-Y: 1.77200 * (Cb - 128) */
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int16x8_t b_sub_y_l = vqrdmulhq_lane_s16(vshlq_n_s16(cb_128_l, 1),
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consts, 3);
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int16x8_t b_sub_y_h = vqrdmulhq_lane_s16(vshlq_n_s16(cb_128_h, 1),
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consts, 3);
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/* Add Y. */
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int16x8_t r_l =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y_l),
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vget_low_u8(y)));
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int16x8_t r_h =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y_h),
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vget_high_u8(y)));
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int16x8_t b_l =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y_l),
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vget_low_u8(y)));
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int16x8_t b_h =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y_h),
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vget_high_u8(y)));
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int16x8_t g_l =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y_l),
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vget_low_u8(y)));
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int16x8_t g_h =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y_h),
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vget_high_u8(y)));
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#if RGB_PIXELSIZE == 4
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uint8x16x4_t rgba;
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/* Convert each component to unsigned and narrow, clamping to [0-255]. */
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rgba.val[RGB_RED] = vcombine_u8(vqmovun_s16(r_l), vqmovun_s16(r_h));
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rgba.val[RGB_GREEN] = vcombine_u8(vqmovun_s16(g_l), vqmovun_s16(g_h));
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rgba.val[RGB_BLUE] = vcombine_u8(vqmovun_s16(b_l), vqmovun_s16(b_h));
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/* Set alpha channel to opaque (0xFF). */
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rgba.val[RGB_ALPHA] = vdupq_n_u8(0xFF);
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/* Store RGBA pixel data to memory. */
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vst4q_u8(outptr, rgba);
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#elif RGB_PIXELSIZE == 3
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uint8x16x3_t rgb;
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/* Convert each component to unsigned and narrow, clamping to [0-255]. */
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rgb.val[RGB_RED] = vcombine_u8(vqmovun_s16(r_l), vqmovun_s16(r_h));
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rgb.val[RGB_GREEN] = vcombine_u8(vqmovun_s16(g_l), vqmovun_s16(g_h));
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rgb.val[RGB_BLUE] = vcombine_u8(vqmovun_s16(b_l), vqmovun_s16(b_h));
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/* Store RGB pixel data to memory. */
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vst3q_u8(outptr, rgb);
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#else
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/* Pack R, G, and B values in ratio 5:6:5. */
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uint16x8_t rgb565_l = vqshluq_n_s16(r_l, 8);
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rgb565_l = vsriq_n_u16(rgb565_l, vqshluq_n_s16(g_l, 8), 5);
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rgb565_l = vsriq_n_u16(rgb565_l, vqshluq_n_s16(b_l, 8), 11);
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uint16x8_t rgb565_h = vqshluq_n_s16(r_h, 8);
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rgb565_h = vsriq_n_u16(rgb565_h, vqshluq_n_s16(g_h, 8), 5);
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rgb565_h = vsriq_n_u16(rgb565_h, vqshluq_n_s16(b_h, 8), 11);
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/* Store RGB pixel data to memory. */
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vst1q_u16((uint16_t *)outptr, rgb565_l);
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vst1q_u16(((uint16_t *)outptr) + 8, rgb565_h);
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#endif
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/* Increment pointers. */
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inptr0 += 16;
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inptr1 += 16;
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inptr2 += 16;
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outptr += (RGB_PIXELSIZE * 16);
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}
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if (cols_remaining >= 8) {
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uint8x8_t y = vld1_u8(inptr0);
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uint8x8_t cb = vld1_u8(inptr1);
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uint8x8_t cr = vld1_u8(inptr2);
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/* Subtract 128 from Cb and Cr. */
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int16x8_t cr_128 =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(neg_128), cr));
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int16x8_t cb_128 =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(neg_128), cb));
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/* Compute G-Y: - 0.34414 * (Cb - 128) - 0.71414 * (Cr - 128) */
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int32x4_t g_sub_y_l = vmull_lane_s16(vget_low_s16(cb_128), consts, 0);
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int32x4_t g_sub_y_h = vmull_lane_s16(vget_high_s16(cb_128), consts, 0);
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g_sub_y_l = vmlsl_lane_s16(g_sub_y_l, vget_low_s16(cr_128), consts, 1);
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g_sub_y_h = vmlsl_lane_s16(g_sub_y_h, vget_high_s16(cr_128), consts, 1);
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/* Descale G components: shift right 15, round, and narrow to 16-bit. */
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int16x8_t g_sub_y = vcombine_s16(vrshrn_n_s32(g_sub_y_l, 15),
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vrshrn_n_s32(g_sub_y_h, 15));
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/* Compute R-Y: 1.40200 * (Cr - 128) */
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int16x8_t r_sub_y = vqrdmulhq_lane_s16(vshlq_n_s16(cr_128, 1),
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consts, 2);
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/* Compute B-Y: 1.77200 * (Cb - 128) */
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int16x8_t b_sub_y = vqrdmulhq_lane_s16(vshlq_n_s16(cb_128, 1),
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consts, 3);
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/* Add Y. */
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int16x8_t r =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y), y));
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int16x8_t b =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y), y));
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int16x8_t g =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y), y));
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#if RGB_PIXELSIZE == 4
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uint8x8x4_t rgba;
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/* Convert each component to unsigned and narrow, clamping to [0-255]. */
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rgba.val[RGB_RED] = vqmovun_s16(r);
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rgba.val[RGB_GREEN] = vqmovun_s16(g);
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rgba.val[RGB_BLUE] = vqmovun_s16(b);
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/* Set alpha channel to opaque (0xFF). */
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rgba.val[RGB_ALPHA] = vdup_n_u8(0xFF);
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/* Store RGBA pixel data to memory. */
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vst4_u8(outptr, rgba);
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#elif RGB_PIXELSIZE == 3
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uint8x8x3_t rgb;
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/* Convert each component to unsigned and narrow, clamping to [0-255]. */
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rgb.val[RGB_RED] = vqmovun_s16(r);
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rgb.val[RGB_GREEN] = vqmovun_s16(g);
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rgb.val[RGB_BLUE] = vqmovun_s16(b);
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/* Store RGB pixel data to memory. */
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vst3_u8(outptr, rgb);
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#else
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/* Pack R, G, and B values in ratio 5:6:5. */
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uint16x8_t rgb565 = vqshluq_n_s16(r, 8);
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rgb565 = vsriq_n_u16(rgb565, vqshluq_n_s16(g, 8), 5);
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rgb565 = vsriq_n_u16(rgb565, vqshluq_n_s16(b, 8), 11);
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/* Store RGB pixel data to memory. */
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vst1q_u16((uint16_t *)outptr, rgb565);
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#endif
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/* Increment pointers. */
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inptr0 += 8;
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inptr1 += 8;
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inptr2 += 8;
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outptr += (RGB_PIXELSIZE * 8);
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cols_remaining -= 8;
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}
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/* Handle the tail elements. */
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if (cols_remaining > 0) {
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uint8x8_t y = vld1_u8(inptr0);
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uint8x8_t cb = vld1_u8(inptr1);
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uint8x8_t cr = vld1_u8(inptr2);
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/* Subtract 128 from Cb and Cr. */
|
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int16x8_t cr_128 =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(neg_128), cr));
|
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int16x8_t cb_128 =
|
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(neg_128), cb));
|
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/* Compute G-Y: - 0.34414 * (Cb - 128) - 0.71414 * (Cr - 128) */
|
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int32x4_t g_sub_y_l = vmull_lane_s16(vget_low_s16(cb_128), consts, 0);
|
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int32x4_t g_sub_y_h = vmull_lane_s16(vget_high_s16(cb_128), consts, 0);
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g_sub_y_l = vmlsl_lane_s16(g_sub_y_l, vget_low_s16(cr_128), consts, 1);
|
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g_sub_y_h = vmlsl_lane_s16(g_sub_y_h, vget_high_s16(cr_128), consts, 1);
|
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/* Descale G components: shift right 15, round, and narrow to 16-bit. */
|
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int16x8_t g_sub_y = vcombine_s16(vrshrn_n_s32(g_sub_y_l, 15),
|
||||
vrshrn_n_s32(g_sub_y_h, 15));
|
||||
/* Compute R-Y: 1.40200 * (Cr - 128) */
|
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int16x8_t r_sub_y = vqrdmulhq_lane_s16(vshlq_n_s16(cr_128, 1),
|
||||
consts, 2);
|
||||
/* Compute B-Y: 1.77200 * (Cb - 128) */
|
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int16x8_t b_sub_y = vqrdmulhq_lane_s16(vshlq_n_s16(cb_128, 1),
|
||||
consts, 3);
|
||||
/* Add Y. */
|
||||
int16x8_t r =
|
||||
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y), y));
|
||||
int16x8_t b =
|
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y), y));
|
||||
int16x8_t g =
|
||||
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y), y));
|
||||
|
||||
#if RGB_PIXELSIZE == 4
|
||||
uint8x8x4_t rgba;
|
||||
/* Convert each component to unsigned and narrow, clamping to [0-255]. */
|
||||
rgba.val[RGB_RED] = vqmovun_s16(r);
|
||||
rgba.val[RGB_GREEN] = vqmovun_s16(g);
|
||||
rgba.val[RGB_BLUE] = vqmovun_s16(b);
|
||||
/* Set alpha channel to opaque (0xFF). */
|
||||
rgba.val[RGB_ALPHA] = vdup_n_u8(0xFF);
|
||||
/* Store RGBA pixel data to memory. */
|
||||
switch (cols_remaining) {
|
||||
case 7:
|
||||
vst4_lane_u8(outptr + 6 * RGB_PIXELSIZE, rgba, 6);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 6:
|
||||
vst4_lane_u8(outptr + 5 * RGB_PIXELSIZE, rgba, 5);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 5:
|
||||
vst4_lane_u8(outptr + 4 * RGB_PIXELSIZE, rgba, 4);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 4:
|
||||
vst4_lane_u8(outptr + 3 * RGB_PIXELSIZE, rgba, 3);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 3:
|
||||
vst4_lane_u8(outptr + 2 * RGB_PIXELSIZE, rgba, 2);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 2:
|
||||
vst4_lane_u8(outptr + RGB_PIXELSIZE, rgba, 1);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 1:
|
||||
vst4_lane_u8(outptr, rgba, 0);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
default:
|
||||
break;
|
||||
}
|
||||
#elif RGB_PIXELSIZE == 3
|
||||
uint8x8x3_t rgb;
|
||||
/* Convert each component to unsigned and narrow, clamping to [0-255]. */
|
||||
rgb.val[RGB_RED] = vqmovun_s16(r);
|
||||
rgb.val[RGB_GREEN] = vqmovun_s16(g);
|
||||
rgb.val[RGB_BLUE] = vqmovun_s16(b);
|
||||
/* Store RGB pixel data to memory. */
|
||||
switch (cols_remaining) {
|
||||
case 7:
|
||||
vst3_lane_u8(outptr + 6 * RGB_PIXELSIZE, rgb, 6);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 6:
|
||||
vst3_lane_u8(outptr + 5 * RGB_PIXELSIZE, rgb, 5);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 5:
|
||||
vst3_lane_u8(outptr + 4 * RGB_PIXELSIZE, rgb, 4);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 4:
|
||||
vst3_lane_u8(outptr + 3 * RGB_PIXELSIZE, rgb, 3);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 3:
|
||||
vst3_lane_u8(outptr + 2 * RGB_PIXELSIZE, rgb, 2);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 2:
|
||||
vst3_lane_u8(outptr + RGB_PIXELSIZE, rgb, 1);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 1:
|
||||
vst3_lane_u8(outptr, rgb, 0);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
default:
|
||||
break;
|
||||
}
|
||||
#else
|
||||
/* Pack R, G, and B values in ratio 5:6:5. */
|
||||
uint16x8_t rgb565 = vqshluq_n_s16(r, 8);
|
||||
rgb565 = vsriq_n_u16(rgb565, vqshluq_n_s16(g, 8), 5);
|
||||
rgb565 = vsriq_n_u16(rgb565, vqshluq_n_s16(b, 8), 11);
|
||||
/* Store RGB565 pixel data to memory. */
|
||||
switch (cols_remaining) {
|
||||
case 7:
|
||||
vst1q_lane_u16((uint16_t *)(outptr + 6 * RGB_PIXELSIZE), rgb565, 6);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 6:
|
||||
vst1q_lane_u16((uint16_t *)(outptr + 5 * RGB_PIXELSIZE), rgb565, 5);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 5:
|
||||
vst1q_lane_u16((uint16_t *)(outptr + 4 * RGB_PIXELSIZE), rgb565, 4);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 4:
|
||||
vst1q_lane_u16((uint16_t *)(outptr + 3 * RGB_PIXELSIZE), rgb565, 3);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 3:
|
||||
vst1q_lane_u16((uint16_t *)(outptr + 2 * RGB_PIXELSIZE), rgb565, 2);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 2:
|
||||
vst1q_lane_u16((uint16_t *)(outptr + RGB_PIXELSIZE), rgb565, 1);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
case 1:
|
||||
vst1q_lane_u16((uint16_t *)outptr, rgb565, 0);
|
||||
FALLTHROUGH /*FALLTHROUGH*/
|
||||
default:
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user