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668 lines
28 KiB
668 lines
28 KiB
/*
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* jdmrgext-neon.c - merged upsampling/color 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 jdmerge-neon.c. */
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/* These routines combine simple (non-fancy, i.e. non-smooth) h2v1 or h2v2
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* chroma upsampling and YCbCr -> RGB color conversion into a single function.
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*
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* As with the standalone functions, YCbCr -> RGB conversion is defined by the
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* 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 jdmerge-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 merged upsampling/YCbCr -> RGB conversion
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* 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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/* Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical.
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*/
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void jsimd_h2v1_merged_upsample_neon(JDIMENSION output_width,
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JSAMPIMAGE input_buf,
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JDIMENSION in_row_group_ctr,
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JSAMPARRAY output_buf)
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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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inptr0 = input_buf[0][in_row_group_ctr];
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inptr1 = input_buf[1][in_row_group_ctr];
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inptr2 = input_buf[2][in_row_group_ctr];
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outptr = output_buf[0];
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int cols_remaining = output_width;
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for (; cols_remaining >= 16; cols_remaining -= 16) {
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/* De-interleave Y component values into two separate vectors, one
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* containing the component values with even-numbered indices and one
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* containing the component values with odd-numbered indices.
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*/
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uint8x8x2_t y = vld2_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), 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), consts, 3);
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/* Add the chroma-derived values (G-Y, R-Y, and B-Y) to both the "even" and
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* "odd" Y component values. This effectively upsamples the chroma
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* components horizontally.
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*/
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int16x8_t g_even =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y),
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y.val[0]));
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int16x8_t r_even =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y),
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y.val[0]));
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int16x8_t b_even =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y),
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y.val[0]));
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int16x8_t g_odd =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y),
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y.val[1]));
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int16x8_t r_odd =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y),
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y.val[1]));
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int16x8_t b_odd =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y),
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y.val[1]));
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/* Convert each component to unsigned and narrow, clamping to [0-255].
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* Re-interleave the "even" and "odd" component values.
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*/
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uint8x8x2_t r = vzip_u8(vqmovun_s16(r_even), vqmovun_s16(r_odd));
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uint8x8x2_t g = vzip_u8(vqmovun_s16(g_even), vqmovun_s16(g_odd));
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uint8x8x2_t b = vzip_u8(vqmovun_s16(b_even), vqmovun_s16(b_odd));
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#ifdef RGB_ALPHA
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uint8x16x4_t rgba;
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rgba.val[RGB_RED] = vcombine_u8(r.val[0], r.val[1]);
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rgba.val[RGB_GREEN] = vcombine_u8(g.val[0], g.val[1]);
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rgba.val[RGB_BLUE] = vcombine_u8(b.val[0], b.val[1]);
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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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#else
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uint8x16x3_t rgb;
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rgb.val[RGB_RED] = vcombine_u8(r.val[0], r.val[1]);
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rgb.val[RGB_GREEN] = vcombine_u8(g.val[0], g.val[1]);
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rgb.val[RGB_BLUE] = vcombine_u8(b.val[0], b.val[1]);
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/* Store RGB pixel data to memory. */
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vst3q_u8(outptr, rgb);
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#endif
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/* Increment pointers. */
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inptr0 += 16;
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inptr1 += 8;
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inptr2 += 8;
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outptr += (RGB_PIXELSIZE * 16);
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}
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if (cols_remaining > 0) {
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/* De-interleave Y component values into two separate vectors, one
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* containing the component values with even-numbered indices and one
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* containing the component values with odd-numbered indices.
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*/
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uint8x8x2_t y = vld2_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), 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), consts, 3);
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/* Add the chroma-derived values (G-Y, R-Y, and B-Y) to both the "even" and
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* "odd" Y component values. This effectively upsamples the chroma
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* components horizontally.
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*/
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int16x8_t g_even =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y),
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y.val[0]));
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int16x8_t r_even =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y),
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y.val[0]));
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int16x8_t b_even =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y),
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y.val[0]));
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int16x8_t g_odd =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y),
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y.val[1]));
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int16x8_t r_odd =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y),
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y.val[1]));
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int16x8_t b_odd =
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vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y),
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y.val[1]));
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/* Convert each component to unsigned and narrow, clamping to [0-255].
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* Re-interleave the "even" and "odd" component values.
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*/
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uint8x8x2_t r = vzip_u8(vqmovun_s16(r_even), vqmovun_s16(r_odd));
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uint8x8x2_t g = vzip_u8(vqmovun_s16(g_even), vqmovun_s16(g_odd));
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uint8x8x2_t b = vzip_u8(vqmovun_s16(b_even), vqmovun_s16(b_odd));
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#ifdef RGB_ALPHA
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uint8x8x4_t rgba_h;
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rgba_h.val[RGB_RED] = r.val[1];
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rgba_h.val[RGB_GREEN] = g.val[1];
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rgba_h.val[RGB_BLUE] = b.val[1];
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/* Set alpha channel to opaque (0xFF). */
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rgba_h.val[RGB_ALPHA] = vdup_n_u8(0xFF);
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uint8x8x4_t rgba_l;
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rgba_l.val[RGB_RED] = r.val[0];
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rgba_l.val[RGB_GREEN] = g.val[0];
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rgba_l.val[RGB_BLUE] = b.val[0];
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/* Set alpha channel to opaque (0xFF). */
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rgba_l.val[RGB_ALPHA] = vdup_n_u8(0xFF);
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/* Store RGBA pixel data to memory. */
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switch (cols_remaining) {
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case 15:
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vst4_lane_u8(outptr + 14 * RGB_PIXELSIZE, rgba_h, 6);
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case 14:
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vst4_lane_u8(outptr + 13 * RGB_PIXELSIZE, rgba_h, 5);
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case 13:
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vst4_lane_u8(outptr + 12 * RGB_PIXELSIZE, rgba_h, 4);
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case 12:
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vst4_lane_u8(outptr + 11 * RGB_PIXELSIZE, rgba_h, 3);
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case 11:
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vst4_lane_u8(outptr + 10 * RGB_PIXELSIZE, rgba_h, 2);
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case 10:
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vst4_lane_u8(outptr + 9 * RGB_PIXELSIZE, rgba_h, 1);
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case 9:
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vst4_lane_u8(outptr + 8 * RGB_PIXELSIZE, rgba_h, 0);
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case 8:
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vst4_u8(outptr, rgba_l);
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break;
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case 7:
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vst4_lane_u8(outptr + 6 * RGB_PIXELSIZE, rgba_l, 6);
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case 6:
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vst4_lane_u8(outptr + 5 * RGB_PIXELSIZE, rgba_l, 5);
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case 5:
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vst4_lane_u8(outptr + 4 * RGB_PIXELSIZE, rgba_l, 4);
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case 4:
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vst4_lane_u8(outptr + 3 * RGB_PIXELSIZE, rgba_l, 3);
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case 3:
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vst4_lane_u8(outptr + 2 * RGB_PIXELSIZE, rgba_l, 2);
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case 2:
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vst4_lane_u8(outptr + RGB_PIXELSIZE, rgba_l, 1);
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case 1:
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vst4_lane_u8(outptr, rgba_l, 0);
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default:
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break;
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}
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#else
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uint8x8x3_t rgb_h;
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rgb_h.val[RGB_RED] = r.val[1];
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rgb_h.val[RGB_GREEN] = g.val[1];
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rgb_h.val[RGB_BLUE] = b.val[1];
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uint8x8x3_t rgb_l;
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rgb_l.val[RGB_RED] = r.val[0];
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rgb_l.val[RGB_GREEN] = g.val[0];
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rgb_l.val[RGB_BLUE] = b.val[0];
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/* Store RGB pixel data to memory. */
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switch (cols_remaining) {
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case 15:
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vst3_lane_u8(outptr + 14 * RGB_PIXELSIZE, rgb_h, 6);
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case 14:
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vst3_lane_u8(outptr + 13 * RGB_PIXELSIZE, rgb_h, 5);
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case 13:
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vst3_lane_u8(outptr + 12 * RGB_PIXELSIZE, rgb_h, 4);
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case 12:
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vst3_lane_u8(outptr + 11 * RGB_PIXELSIZE, rgb_h, 3);
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case 11:
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vst3_lane_u8(outptr + 10 * RGB_PIXELSIZE, rgb_h, 2);
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case 10:
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vst3_lane_u8(outptr + 9 * RGB_PIXELSIZE, rgb_h, 1);
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case 9:
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vst3_lane_u8(outptr + 8 * RGB_PIXELSIZE, rgb_h, 0);
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case 8:
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vst3_u8(outptr, rgb_l);
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break;
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case 7:
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vst3_lane_u8(outptr + 6 * RGB_PIXELSIZE, rgb_l, 6);
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case 6:
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vst3_lane_u8(outptr + 5 * RGB_PIXELSIZE, rgb_l, 5);
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case 5:
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vst3_lane_u8(outptr + 4 * RGB_PIXELSIZE, rgb_l, 4);
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case 4:
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vst3_lane_u8(outptr + 3 * RGB_PIXELSIZE, rgb_l, 3);
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case 3:
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vst3_lane_u8(outptr + 2 * RGB_PIXELSIZE, rgb_l, 2);
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case 2:
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vst3_lane_u8(outptr + RGB_PIXELSIZE, rgb_l, 1);
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case 1:
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vst3_lane_u8(outptr, rgb_l, 0);
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default:
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break;
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}
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#endif
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}
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}
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/* Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical.
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*
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* See comments above for details regarding color conversion and safe memory
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* access.
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*/
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void jsimd_h2v2_merged_upsample_neon(JDIMENSION output_width,
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JSAMPIMAGE input_buf,
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JDIMENSION in_row_group_ctr,
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JSAMPARRAY output_buf)
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{
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JSAMPROW outptr0, outptr1;
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/* Pointers to Y (both rows), Cb, and Cr data */
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JSAMPROW inptr0_0, inptr0_1, 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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inptr0_0 = input_buf[0][in_row_group_ctr * 2];
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inptr0_1 = input_buf[0][in_row_group_ctr * 2 + 1];
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inptr1 = input_buf[1][in_row_group_ctr];
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inptr2 = input_buf[2][in_row_group_ctr];
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outptr0 = output_buf[0];
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outptr1 = output_buf[1];
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int cols_remaining = output_width;
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for (; cols_remaining >= 16; cols_remaining -= 16) {
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/* For each row, de-interleave Y component values into two separate
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* vectors, one containing the component values with even-numbered indices
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* and one containing the component values with odd-numbered indices.
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*/
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uint8x8x2_t y0 = vld2_u8(inptr0_0);
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uint8x8x2_t y1 = vld2_u8(inptr0_1);
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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);
|
|
/* Descale G components: shift right 15, round, and narrow to 16-bit. */
|
|
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) */
|
|
int16x8_t r_sub_y = vqrdmulhq_lane_s16(vshlq_n_s16(cr_128, 1), consts, 2);
|
|
/* Compute B-Y: 1.77200 * (Cb - 128) */
|
|
int16x8_t b_sub_y = vqrdmulhq_lane_s16(vshlq_n_s16(cb_128, 1), consts, 3);
|
|
/* For each row, add the chroma-derived values (G-Y, R-Y, and B-Y) to both
|
|
* the "even" and "odd" Y component values. This effectively upsamples the
|
|
* chroma components both horizontally and vertically.
|
|
*/
|
|
int16x8_t g0_even =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y),
|
|
y0.val[0]));
|
|
int16x8_t r0_even =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y),
|
|
y0.val[0]));
|
|
int16x8_t b0_even =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y),
|
|
y0.val[0]));
|
|
int16x8_t g0_odd =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y),
|
|
y0.val[1]));
|
|
int16x8_t r0_odd =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y),
|
|
y0.val[1]));
|
|
int16x8_t b0_odd =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y),
|
|
y0.val[1]));
|
|
int16x8_t g1_even =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y),
|
|
y1.val[0]));
|
|
int16x8_t r1_even =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y),
|
|
y1.val[0]));
|
|
int16x8_t b1_even =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y),
|
|
y1.val[0]));
|
|
int16x8_t g1_odd =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y),
|
|
y1.val[1]));
|
|
int16x8_t r1_odd =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y),
|
|
y1.val[1]));
|
|
int16x8_t b1_odd =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y),
|
|
y1.val[1]));
|
|
/* Convert each component to unsigned and narrow, clamping to [0-255].
|
|
* Re-interleave the "even" and "odd" component values.
|
|
*/
|
|
uint8x8x2_t r0 = vzip_u8(vqmovun_s16(r0_even), vqmovun_s16(r0_odd));
|
|
uint8x8x2_t r1 = vzip_u8(vqmovun_s16(r1_even), vqmovun_s16(r1_odd));
|
|
uint8x8x2_t g0 = vzip_u8(vqmovun_s16(g0_even), vqmovun_s16(g0_odd));
|
|
uint8x8x2_t g1 = vzip_u8(vqmovun_s16(g1_even), vqmovun_s16(g1_odd));
|
|
uint8x8x2_t b0 = vzip_u8(vqmovun_s16(b0_even), vqmovun_s16(b0_odd));
|
|
uint8x8x2_t b1 = vzip_u8(vqmovun_s16(b1_even), vqmovun_s16(b1_odd));
|
|
|
|
#ifdef RGB_ALPHA
|
|
uint8x16x4_t rgba0, rgba1;
|
|
rgba0.val[RGB_RED] = vcombine_u8(r0.val[0], r0.val[1]);
|
|
rgba1.val[RGB_RED] = vcombine_u8(r1.val[0], r1.val[1]);
|
|
rgba0.val[RGB_GREEN] = vcombine_u8(g0.val[0], g0.val[1]);
|
|
rgba1.val[RGB_GREEN] = vcombine_u8(g1.val[0], g1.val[1]);
|
|
rgba0.val[RGB_BLUE] = vcombine_u8(b0.val[0], b0.val[1]);
|
|
rgba1.val[RGB_BLUE] = vcombine_u8(b1.val[0], b1.val[1]);
|
|
/* Set alpha channel to opaque (0xFF). */
|
|
rgba0.val[RGB_ALPHA] = vdupq_n_u8(0xFF);
|
|
rgba1.val[RGB_ALPHA] = vdupq_n_u8(0xFF);
|
|
/* Store RGBA pixel data to memory. */
|
|
vst4q_u8(outptr0, rgba0);
|
|
vst4q_u8(outptr1, rgba1);
|
|
#else
|
|
uint8x16x3_t rgb0, rgb1;
|
|
rgb0.val[RGB_RED] = vcombine_u8(r0.val[0], r0.val[1]);
|
|
rgb1.val[RGB_RED] = vcombine_u8(r1.val[0], r1.val[1]);
|
|
rgb0.val[RGB_GREEN] = vcombine_u8(g0.val[0], g0.val[1]);
|
|
rgb1.val[RGB_GREEN] = vcombine_u8(g1.val[0], g1.val[1]);
|
|
rgb0.val[RGB_BLUE] = vcombine_u8(b0.val[0], b0.val[1]);
|
|
rgb1.val[RGB_BLUE] = vcombine_u8(b1.val[0], b1.val[1]);
|
|
/* Store RGB pixel data to memory. */
|
|
vst3q_u8(outptr0, rgb0);
|
|
vst3q_u8(outptr1, rgb1);
|
|
#endif
|
|
|
|
/* Increment pointers. */
|
|
inptr0_0 += 16;
|
|
inptr0_1 += 16;
|
|
inptr1 += 8;
|
|
inptr2 += 8;
|
|
outptr0 += (RGB_PIXELSIZE * 16);
|
|
outptr1 += (RGB_PIXELSIZE * 16);
|
|
}
|
|
|
|
if (cols_remaining > 0) {
|
|
/* For each row, de-interleave Y component values into two separate
|
|
* vectors, one containing the component values with even-numbered indices
|
|
* and one containing the component values with odd-numbered indices.
|
|
*/
|
|
uint8x8x2_t y0 = vld2_u8(inptr0_0);
|
|
uint8x8x2_t y1 = vld2_u8(inptr0_1);
|
|
uint8x8_t cb = vld1_u8(inptr1);
|
|
uint8x8_t cr = vld1_u8(inptr2);
|
|
/* Subtract 128 from Cb and Cr. */
|
|
int16x8_t cr_128 =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(neg_128), cr));
|
|
int16x8_t cb_128 =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(neg_128), cb));
|
|
/* Compute G-Y: - 0.34414 * (Cb - 128) - 0.71414 * (Cr - 128) */
|
|
int32x4_t g_sub_y_l = vmull_lane_s16(vget_low_s16(cb_128), consts, 0);
|
|
int32x4_t g_sub_y_h = vmull_lane_s16(vget_high_s16(cb_128), consts, 0);
|
|
g_sub_y_l = vmlsl_lane_s16(g_sub_y_l, vget_low_s16(cr_128), consts, 1);
|
|
g_sub_y_h = vmlsl_lane_s16(g_sub_y_h, vget_high_s16(cr_128), consts, 1);
|
|
/* Descale G components: shift right 15, round, and narrow to 16-bit. */
|
|
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) */
|
|
int16x8_t r_sub_y = vqrdmulhq_lane_s16(vshlq_n_s16(cr_128, 1), consts, 2);
|
|
/* Compute B-Y: 1.77200 * (Cb - 128) */
|
|
int16x8_t b_sub_y = vqrdmulhq_lane_s16(vshlq_n_s16(cb_128, 1), consts, 3);
|
|
/* For each row, add the chroma-derived values (G-Y, R-Y, and B-Y) to both
|
|
* the "even" and "odd" Y component values. This effectively upsamples the
|
|
* chroma components both horizontally and vertically.
|
|
*/
|
|
int16x8_t g0_even =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y),
|
|
y0.val[0]));
|
|
int16x8_t r0_even =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y),
|
|
y0.val[0]));
|
|
int16x8_t b0_even =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y),
|
|
y0.val[0]));
|
|
int16x8_t g0_odd =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y),
|
|
y0.val[1]));
|
|
int16x8_t r0_odd =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y),
|
|
y0.val[1]));
|
|
int16x8_t b0_odd =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y),
|
|
y0.val[1]));
|
|
int16x8_t g1_even =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y),
|
|
y1.val[0]));
|
|
int16x8_t r1_even =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y),
|
|
y1.val[0]));
|
|
int16x8_t b1_even =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y),
|
|
y1.val[0]));
|
|
int16x8_t g1_odd =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(g_sub_y),
|
|
y1.val[1]));
|
|
int16x8_t r1_odd =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(r_sub_y),
|
|
y1.val[1]));
|
|
int16x8_t b1_odd =
|
|
vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(b_sub_y),
|
|
y1.val[1]));
|
|
/* Convert each component to unsigned and narrow, clamping to [0-255].
|
|
* Re-interleave the "even" and "odd" component values.
|
|
*/
|
|
uint8x8x2_t r0 = vzip_u8(vqmovun_s16(r0_even), vqmovun_s16(r0_odd));
|
|
uint8x8x2_t r1 = vzip_u8(vqmovun_s16(r1_even), vqmovun_s16(r1_odd));
|
|
uint8x8x2_t g0 = vzip_u8(vqmovun_s16(g0_even), vqmovun_s16(g0_odd));
|
|
uint8x8x2_t g1 = vzip_u8(vqmovun_s16(g1_even), vqmovun_s16(g1_odd));
|
|
uint8x8x2_t b0 = vzip_u8(vqmovun_s16(b0_even), vqmovun_s16(b0_odd));
|
|
uint8x8x2_t b1 = vzip_u8(vqmovun_s16(b1_even), vqmovun_s16(b1_odd));
|
|
|
|
#ifdef RGB_ALPHA
|
|
uint8x8x4_t rgba0_h, rgba1_h;
|
|
rgba0_h.val[RGB_RED] = r0.val[1];
|
|
rgba1_h.val[RGB_RED] = r1.val[1];
|
|
rgba0_h.val[RGB_GREEN] = g0.val[1];
|
|
rgba1_h.val[RGB_GREEN] = g1.val[1];
|
|
rgba0_h.val[RGB_BLUE] = b0.val[1];
|
|
rgba1_h.val[RGB_BLUE] = b1.val[1];
|
|
/* Set alpha channel to opaque (0xFF). */
|
|
rgba0_h.val[RGB_ALPHA] = vdup_n_u8(0xFF);
|
|
rgba1_h.val[RGB_ALPHA] = vdup_n_u8(0xFF);
|
|
|
|
uint8x8x4_t rgba0_l, rgba1_l;
|
|
rgba0_l.val[RGB_RED] = r0.val[0];
|
|
rgba1_l.val[RGB_RED] = r1.val[0];
|
|
rgba0_l.val[RGB_GREEN] = g0.val[0];
|
|
rgba1_l.val[RGB_GREEN] = g1.val[0];
|
|
rgba0_l.val[RGB_BLUE] = b0.val[0];
|
|
rgba1_l.val[RGB_BLUE] = b1.val[0];
|
|
/* Set alpha channel to opaque (0xFF). */
|
|
rgba0_l.val[RGB_ALPHA] = vdup_n_u8(0xFF);
|
|
rgba1_l.val[RGB_ALPHA] = vdup_n_u8(0xFF);
|
|
/* Store RGBA pixel data to memory. */
|
|
switch (cols_remaining) {
|
|
case 15:
|
|
vst4_lane_u8(outptr0 + 14 * RGB_PIXELSIZE, rgba0_h, 6);
|
|
vst4_lane_u8(outptr1 + 14 * RGB_PIXELSIZE, rgba1_h, 6);
|
|
case 14:
|
|
vst4_lane_u8(outptr0 + 13 * RGB_PIXELSIZE, rgba0_h, 5);
|
|
vst4_lane_u8(outptr1 + 13 * RGB_PIXELSIZE, rgba1_h, 5);
|
|
case 13:
|
|
vst4_lane_u8(outptr0 + 12 * RGB_PIXELSIZE, rgba0_h, 4);
|
|
vst4_lane_u8(outptr1 + 12 * RGB_PIXELSIZE, rgba1_h, 4);
|
|
case 12:
|
|
vst4_lane_u8(outptr0 + 11 * RGB_PIXELSIZE, rgba0_h, 3);
|
|
vst4_lane_u8(outptr1 + 11 * RGB_PIXELSIZE, rgba1_h, 3);
|
|
case 11:
|
|
vst4_lane_u8(outptr0 + 10 * RGB_PIXELSIZE, rgba0_h, 2);
|
|
vst4_lane_u8(outptr1 + 10 * RGB_PIXELSIZE, rgba1_h, 2);
|
|
case 10:
|
|
vst4_lane_u8(outptr0 + 9 * RGB_PIXELSIZE, rgba0_h, 1);
|
|
vst4_lane_u8(outptr1 + 9 * RGB_PIXELSIZE, rgba1_h, 1);
|
|
case 9:
|
|
vst4_lane_u8(outptr0 + 8 * RGB_PIXELSIZE, rgba0_h, 0);
|
|
vst4_lane_u8(outptr1 + 8 * RGB_PIXELSIZE, rgba1_h, 0);
|
|
case 8:
|
|
vst4_u8(outptr0, rgba0_l);
|
|
vst4_u8(outptr1, rgba1_l);
|
|
break;
|
|
case 7:
|
|
vst4_lane_u8(outptr0 + 6 * RGB_PIXELSIZE, rgba0_l, 6);
|
|
vst4_lane_u8(outptr1 + 6 * RGB_PIXELSIZE, rgba1_l, 6);
|
|
case 6:
|
|
vst4_lane_u8(outptr0 + 5 * RGB_PIXELSIZE, rgba0_l, 5);
|
|
vst4_lane_u8(outptr1 + 5 * RGB_PIXELSIZE, rgba1_l, 5);
|
|
case 5:
|
|
vst4_lane_u8(outptr0 + 4 * RGB_PIXELSIZE, rgba0_l, 4);
|
|
vst4_lane_u8(outptr1 + 4 * RGB_PIXELSIZE, rgba1_l, 4);
|
|
case 4:
|
|
vst4_lane_u8(outptr0 + 3 * RGB_PIXELSIZE, rgba0_l, 3);
|
|
vst4_lane_u8(outptr1 + 3 * RGB_PIXELSIZE, rgba1_l, 3);
|
|
case 3:
|
|
vst4_lane_u8(outptr0 + 2 * RGB_PIXELSIZE, rgba0_l, 2);
|
|
vst4_lane_u8(outptr1 + 2 * RGB_PIXELSIZE, rgba1_l, 2);
|
|
case 2:
|
|
vst4_lane_u8(outptr0 + 1 * RGB_PIXELSIZE, rgba0_l, 1);
|
|
vst4_lane_u8(outptr1 + 1 * RGB_PIXELSIZE, rgba1_l, 1);
|
|
case 1:
|
|
vst4_lane_u8(outptr0, rgba0_l, 0);
|
|
vst4_lane_u8(outptr1, rgba1_l, 0);
|
|
default:
|
|
break;
|
|
}
|
|
#else
|
|
uint8x8x3_t rgb0_h, rgb1_h;
|
|
rgb0_h.val[RGB_RED] = r0.val[1];
|
|
rgb1_h.val[RGB_RED] = r1.val[1];
|
|
rgb0_h.val[RGB_GREEN] = g0.val[1];
|
|
rgb1_h.val[RGB_GREEN] = g1.val[1];
|
|
rgb0_h.val[RGB_BLUE] = b0.val[1];
|
|
rgb1_h.val[RGB_BLUE] = b1.val[1];
|
|
|
|
uint8x8x3_t rgb0_l, rgb1_l;
|
|
rgb0_l.val[RGB_RED] = r0.val[0];
|
|
rgb1_l.val[RGB_RED] = r1.val[0];
|
|
rgb0_l.val[RGB_GREEN] = g0.val[0];
|
|
rgb1_l.val[RGB_GREEN] = g1.val[0];
|
|
rgb0_l.val[RGB_BLUE] = b0.val[0];
|
|
rgb1_l.val[RGB_BLUE] = b1.val[0];
|
|
/* Store RGB pixel data to memory. */
|
|
switch (cols_remaining) {
|
|
case 15:
|
|
vst3_lane_u8(outptr0 + 14 * RGB_PIXELSIZE, rgb0_h, 6);
|
|
vst3_lane_u8(outptr1 + 14 * RGB_PIXELSIZE, rgb1_h, 6);
|
|
case 14:
|
|
vst3_lane_u8(outptr0 + 13 * RGB_PIXELSIZE, rgb0_h, 5);
|
|
vst3_lane_u8(outptr1 + 13 * RGB_PIXELSIZE, rgb1_h, 5);
|
|
case 13:
|
|
vst3_lane_u8(outptr0 + 12 * RGB_PIXELSIZE, rgb0_h, 4);
|
|
vst3_lane_u8(outptr1 + 12 * RGB_PIXELSIZE, rgb1_h, 4);
|
|
case 12:
|
|
vst3_lane_u8(outptr0 + 11 * RGB_PIXELSIZE, rgb0_h, 3);
|
|
vst3_lane_u8(outptr1 + 11 * RGB_PIXELSIZE, rgb1_h, 3);
|
|
case 11:
|
|
vst3_lane_u8(outptr0 + 10 * RGB_PIXELSIZE, rgb0_h, 2);
|
|
vst3_lane_u8(outptr1 + 10 * RGB_PIXELSIZE, rgb1_h, 2);
|
|
case 10:
|
|
vst3_lane_u8(outptr0 + 9 * RGB_PIXELSIZE, rgb0_h, 1);
|
|
vst3_lane_u8(outptr1 + 9 * RGB_PIXELSIZE, rgb1_h, 1);
|
|
case 9:
|
|
vst3_lane_u8(outptr0 + 8 * RGB_PIXELSIZE, rgb0_h, 0);
|
|
vst3_lane_u8(outptr1 + 8 * RGB_PIXELSIZE, rgb1_h, 0);
|
|
case 8:
|
|
vst3_u8(outptr0, rgb0_l);
|
|
vst3_u8(outptr1, rgb1_l);
|
|
break;
|
|
case 7:
|
|
vst3_lane_u8(outptr0 + 6 * RGB_PIXELSIZE, rgb0_l, 6);
|
|
vst3_lane_u8(outptr1 + 6 * RGB_PIXELSIZE, rgb1_l, 6);
|
|
case 6:
|
|
vst3_lane_u8(outptr0 + 5 * RGB_PIXELSIZE, rgb0_l, 5);
|
|
vst3_lane_u8(outptr1 + 5 * RGB_PIXELSIZE, rgb1_l, 5);
|
|
case 5:
|
|
vst3_lane_u8(outptr0 + 4 * RGB_PIXELSIZE, rgb0_l, 4);
|
|
vst3_lane_u8(outptr1 + 4 * RGB_PIXELSIZE, rgb1_l, 4);
|
|
case 4:
|
|
vst3_lane_u8(outptr0 + 3 * RGB_PIXELSIZE, rgb0_l, 3);
|
|
vst3_lane_u8(outptr1 + 3 * RGB_PIXELSIZE, rgb1_l, 3);
|
|
case 3:
|
|
vst3_lane_u8(outptr0 + 2 * RGB_PIXELSIZE, rgb0_l, 2);
|
|
vst3_lane_u8(outptr1 + 2 * RGB_PIXELSIZE, rgb1_l, 2);
|
|
case 2:
|
|
vst3_lane_u8(outptr0 + 1 * RGB_PIXELSIZE, rgb0_l, 1);
|
|
vst3_lane_u8(outptr1 + 1 * RGB_PIXELSIZE, rgb1_l, 1);
|
|
case 1:
|
|
vst3_lane_u8(outptr0, rgb0_l, 0);
|
|
vst3_lane_u8(outptr1, rgb1_l, 0);
|
|
default:
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
}
|