| // Copyright 2011 Google Inc. All Rights Reserved. |
| // |
| // Use of this source code is governed by a BSD-style license |
| // that can be found in the COPYING file in the root of the source |
| // tree. An additional intellectual property rights grant can be found |
| // in the file PATENTS. All contributing project authors may |
| // be found in the AUTHORS file in the root of the source tree. |
| // ----------------------------------------------------------------------------- |
| // |
| // NEON version of YUV to RGB upsampling functions. |
| // |
| // Author: mans@mansr.com (Mans Rullgard) |
| // Based on SSE code by: somnath@google.com (Somnath Banerjee) |
| |
| #include "src/dsp/dsp.h" |
| |
| #if defined(WEBP_USE_NEON) |
| |
| #if defined(STARBOARD) |
| #include "starboard/client_porting/poem/assert_poem.h" |
| #include "starboard/client_porting/poem/string_poem.h" |
| #else |
| #include <assert.h> |
| #include <string.h> |
| #endif |
| |
| #include <arm_neon.h> |
| #include "src/dsp/neon.h" |
| #include "src/dsp/yuv.h" |
| |
| #ifdef FANCY_UPSAMPLING |
| |
| //----------------------------------------------------------------------------- |
| // U/V upsampling |
| |
| // Loads 9 pixels each from rows r1 and r2 and generates 16 pixels. |
| #define UPSAMPLE_16PIXELS(r1, r2, out) do { \ |
| const uint8x8_t a = vld1_u8(r1 + 0); \ |
| const uint8x8_t b = vld1_u8(r1 + 1); \ |
| const uint8x8_t c = vld1_u8(r2 + 0); \ |
| const uint8x8_t d = vld1_u8(r2 + 1); \ |
| /* a + b + c + d */ \ |
| const uint16x8_t ad = vaddl_u8(a, d); \ |
| const uint16x8_t bc = vaddl_u8(b, c); \ |
| const uint16x8_t abcd = vaddq_u16(ad, bc); \ |
| /* 3a + b + c + 3d */ \ |
| const uint16x8_t al = vaddq_u16(abcd, vshlq_n_u16(ad, 1)); \ |
| /* a + 3b + 3c + d */ \ |
| const uint16x8_t bl = vaddq_u16(abcd, vshlq_n_u16(bc, 1)); \ |
| \ |
| const uint8x8_t diag2 = vshrn_n_u16(al, 3); \ |
| const uint8x8_t diag1 = vshrn_n_u16(bl, 3); \ |
| \ |
| const uint8x8_t A = vrhadd_u8(a, diag1); \ |
| const uint8x8_t B = vrhadd_u8(b, diag2); \ |
| const uint8x8_t C = vrhadd_u8(c, diag2); \ |
| const uint8x8_t D = vrhadd_u8(d, diag1); \ |
| \ |
| uint8x8x2_t A_B, C_D; \ |
| INIT_VECTOR2(A_B, A, B); \ |
| INIT_VECTOR2(C_D, C, D); \ |
| vst2_u8(out + 0, A_B); \ |
| vst2_u8(out + 32, C_D); \ |
| } while (0) |
| |
| // Turn the macro into a function for reducing code-size when non-critical |
| static void Upsample16Pixels_NEON(const uint8_t *r1, const uint8_t *r2, |
| uint8_t *out) { |
| UPSAMPLE_16PIXELS(r1, r2, out); |
| } |
| |
| #define UPSAMPLE_LAST_BLOCK(tb, bb, num_pixels, out) { \ |
| uint8_t r1[9], r2[9]; \ |
| memcpy(r1, (tb), (num_pixels)); \ |
| memcpy(r2, (bb), (num_pixels)); \ |
| /* replicate last byte */ \ |
| memset(r1 + (num_pixels), r1[(num_pixels) - 1], 9 - (num_pixels)); \ |
| memset(r2 + (num_pixels), r2[(num_pixels) - 1], 9 - (num_pixels)); \ |
| Upsample16Pixels_NEON(r1, r2, out); \ |
| } |
| |
| //----------------------------------------------------------------------------- |
| // YUV->RGB conversion |
| |
| // note: we represent the 33050 large constant as 32768 + 282 |
| static const int16_t kCoeffs1[4] = { 19077, 26149, 6419, 13320 }; |
| |
| #define v255 vdup_n_u8(255) |
| |
| #define STORE_Rgb(out, r, g, b) do { \ |
| uint8x8x3_t r_g_b; \ |
| INIT_VECTOR3(r_g_b, r, g, b); \ |
| vst3_u8(out, r_g_b); \ |
| } while (0) |
| |
| #define STORE_Bgr(out, r, g, b) do { \ |
| uint8x8x3_t b_g_r; \ |
| INIT_VECTOR3(b_g_r, b, g, r); \ |
| vst3_u8(out, b_g_r); \ |
| } while (0) |
| |
| #define STORE_Rgba(out, r, g, b) do { \ |
| uint8x8x4_t r_g_b_v255; \ |
| INIT_VECTOR4(r_g_b_v255, r, g, b, v255); \ |
| vst4_u8(out, r_g_b_v255); \ |
| } while (0) |
| |
| #define STORE_Bgra(out, r, g, b) do { \ |
| uint8x8x4_t b_g_r_v255; \ |
| INIT_VECTOR4(b_g_r_v255, b, g, r, v255); \ |
| vst4_u8(out, b_g_r_v255); \ |
| } while (0) |
| |
| #define STORE_Argb(out, r, g, b) do { \ |
| uint8x8x4_t v255_r_g_b; \ |
| INIT_VECTOR4(v255_r_g_b, v255, r, g, b); \ |
| vst4_u8(out, v255_r_g_b); \ |
| } while (0) |
| |
| #if !defined(WEBP_SWAP_16BIT_CSP) |
| #define ZIP_U8(lo, hi) vzip_u8((lo), (hi)) |
| #else |
| #define ZIP_U8(lo, hi) vzip_u8((hi), (lo)) |
| #endif |
| |
| #define STORE_Rgba4444(out, r, g, b) do { \ |
| const uint8x8_t rg = vsri_n_u8(r, g, 4); /* shift g, insert r */ \ |
| const uint8x8_t ba = vsri_n_u8(b, v255, 4); /* shift a, insert b */ \ |
| const uint8x8x2_t rgba4444 = ZIP_U8(rg, ba); \ |
| vst1q_u8(out, vcombine_u8(rgba4444.val[0], rgba4444.val[1])); \ |
| } while (0) |
| |
| #define STORE_Rgb565(out, r, g, b) do { \ |
| const uint8x8_t rg = vsri_n_u8(r, g, 5); /* shift g and insert r */ \ |
| const uint8x8_t g1 = vshl_n_u8(g, 3); /* pre-shift g: 3bits */ \ |
| const uint8x8_t gb = vsri_n_u8(g1, b, 3); /* shift b and insert g */ \ |
| const uint8x8x2_t rgb565 = ZIP_U8(rg, gb); \ |
| vst1q_u8(out, vcombine_u8(rgb565.val[0], rgb565.val[1])); \ |
| } while (0) |
| |
| #define CONVERT8(FMT, XSTEP, N, src_y, src_uv, out, cur_x) do { \ |
| int i; \ |
| for (i = 0; i < N; i += 8) { \ |
| const int off = ((cur_x) + i) * XSTEP; \ |
| const uint8x8_t y = vld1_u8((src_y) + (cur_x) + i); \ |
| const uint8x8_t u = vld1_u8((src_uv) + i + 0); \ |
| const uint8x8_t v = vld1_u8((src_uv) + i + 16); \ |
| const int16x8_t Y0 = vreinterpretq_s16_u16(vshll_n_u8(y, 7)); \ |
| const int16x8_t U0 = vreinterpretq_s16_u16(vshll_n_u8(u, 7)); \ |
| const int16x8_t V0 = vreinterpretq_s16_u16(vshll_n_u8(v, 7)); \ |
| const int16x8_t Y1 = vqdmulhq_lane_s16(Y0, coeff1, 0); \ |
| const int16x8_t R0 = vqdmulhq_lane_s16(V0, coeff1, 1); \ |
| const int16x8_t G0 = vqdmulhq_lane_s16(U0, coeff1, 2); \ |
| const int16x8_t G1 = vqdmulhq_lane_s16(V0, coeff1, 3); \ |
| const int16x8_t B0 = vqdmulhq_n_s16(U0, 282); \ |
| const int16x8_t R1 = vqaddq_s16(Y1, R_Rounder); \ |
| const int16x8_t G2 = vqaddq_s16(Y1, G_Rounder); \ |
| const int16x8_t B1 = vqaddq_s16(Y1, B_Rounder); \ |
| const int16x8_t R2 = vqaddq_s16(R0, R1); \ |
| const int16x8_t G3 = vqaddq_s16(G0, G1); \ |
| const int16x8_t B2 = vqaddq_s16(B0, B1); \ |
| const int16x8_t G4 = vqsubq_s16(G2, G3); \ |
| const int16x8_t B3 = vqaddq_s16(B2, U0); \ |
| const uint8x8_t R = vqshrun_n_s16(R2, YUV_FIX2); \ |
| const uint8x8_t G = vqshrun_n_s16(G4, YUV_FIX2); \ |
| const uint8x8_t B = vqshrun_n_s16(B3, YUV_FIX2); \ |
| STORE_ ## FMT(out + off, R, G, B); \ |
| } \ |
| } while (0) |
| |
| #define CONVERT1(FUNC, XSTEP, N, src_y, src_uv, rgb, cur_x) { \ |
| int i; \ |
| for (i = 0; i < N; i++) { \ |
| const int off = ((cur_x) + i) * XSTEP; \ |
| const int y = src_y[(cur_x) + i]; \ |
| const int u = (src_uv)[i]; \ |
| const int v = (src_uv)[i + 16]; \ |
| FUNC(y, u, v, rgb + off); \ |
| } \ |
| } |
| |
| #define CONVERT2RGB_8(FMT, XSTEP, top_y, bottom_y, uv, \ |
| top_dst, bottom_dst, cur_x, len) { \ |
| CONVERT8(FMT, XSTEP, len, top_y, uv, top_dst, cur_x); \ |
| if (bottom_y != NULL) { \ |
| CONVERT8(FMT, XSTEP, len, bottom_y, (uv) + 32, bottom_dst, cur_x); \ |
| } \ |
| } |
| |
| #define CONVERT2RGB_1(FUNC, XSTEP, top_y, bottom_y, uv, \ |
| top_dst, bottom_dst, cur_x, len) { \ |
| CONVERT1(FUNC, XSTEP, len, top_y, uv, top_dst, cur_x); \ |
| if (bottom_y != NULL) { \ |
| CONVERT1(FUNC, XSTEP, len, bottom_y, (uv) + 32, bottom_dst, cur_x); \ |
| } \ |
| } |
| |
| #define NEON_UPSAMPLE_FUNC(FUNC_NAME, FMT, XSTEP) \ |
| static void FUNC_NAME(const uint8_t *top_y, const uint8_t *bottom_y, \ |
| const uint8_t *top_u, const uint8_t *top_v, \ |
| const uint8_t *cur_u, const uint8_t *cur_v, \ |
| uint8_t *top_dst, uint8_t *bottom_dst, int len) { \ |
| int block; \ |
| /* 16 byte aligned array to cache reconstructed u and v */ \ |
| uint8_t uv_buf[2 * 32 + 15]; \ |
| uint8_t *const r_uv = (uint8_t*)((uintptr_t)(uv_buf + 15) & ~15); \ |
| const int uv_len = (len + 1) >> 1; \ |
| /* 9 pixels must be read-able for each block */ \ |
| const int num_blocks = (uv_len - 1) >> 3; \ |
| const int leftover = uv_len - num_blocks * 8; \ |
| const int last_pos = 1 + 16 * num_blocks; \ |
| \ |
| const int u_diag = ((top_u[0] + cur_u[0]) >> 1) + 1; \ |
| const int v_diag = ((top_v[0] + cur_v[0]) >> 1) + 1; \ |
| \ |
| const int16x4_t coeff1 = vld1_s16(kCoeffs1); \ |
| const int16x8_t R_Rounder = vdupq_n_s16(-14234); \ |
| const int16x8_t G_Rounder = vdupq_n_s16(8708); \ |
| const int16x8_t B_Rounder = vdupq_n_s16(-17685); \ |
| \ |
| /* Treat the first pixel in regular way */ \ |
| assert(top_y != NULL); \ |
| { \ |
| const int u0 = (top_u[0] + u_diag) >> 1; \ |
| const int v0 = (top_v[0] + v_diag) >> 1; \ |
| VP8YuvTo ## FMT(top_y[0], u0, v0, top_dst); \ |
| } \ |
| if (bottom_y != NULL) { \ |
| const int u0 = (cur_u[0] + u_diag) >> 1; \ |
| const int v0 = (cur_v[0] + v_diag) >> 1; \ |
| VP8YuvTo ## FMT(bottom_y[0], u0, v0, bottom_dst); \ |
| } \ |
| \ |
| for (block = 0; block < num_blocks; ++block) { \ |
| UPSAMPLE_16PIXELS(top_u, cur_u, r_uv); \ |
| UPSAMPLE_16PIXELS(top_v, cur_v, r_uv + 16); \ |
| CONVERT2RGB_8(FMT, XSTEP, top_y, bottom_y, r_uv, \ |
| top_dst, bottom_dst, 16 * block + 1, 16); \ |
| top_u += 8; \ |
| cur_u += 8; \ |
| top_v += 8; \ |
| cur_v += 8; \ |
| } \ |
| \ |
| UPSAMPLE_LAST_BLOCK(top_u, cur_u, leftover, r_uv); \ |
| UPSAMPLE_LAST_BLOCK(top_v, cur_v, leftover, r_uv + 16); \ |
| CONVERT2RGB_1(VP8YuvTo ## FMT, XSTEP, top_y, bottom_y, r_uv, \ |
| top_dst, bottom_dst, last_pos, len - last_pos); \ |
| } |
| |
| // NEON variants of the fancy upsampler. |
| NEON_UPSAMPLE_FUNC(UpsampleRgbaLinePair_NEON, Rgba, 4) |
| NEON_UPSAMPLE_FUNC(UpsampleBgraLinePair_NEON, Bgra, 4) |
| #if !defined(WEBP_REDUCE_CSP) |
| NEON_UPSAMPLE_FUNC(UpsampleRgbLinePair_NEON, Rgb, 3) |
| NEON_UPSAMPLE_FUNC(UpsampleBgrLinePair_NEON, Bgr, 3) |
| NEON_UPSAMPLE_FUNC(UpsampleArgbLinePair_NEON, Argb, 4) |
| NEON_UPSAMPLE_FUNC(UpsampleRgba4444LinePair_NEON, Rgba4444, 2) |
| NEON_UPSAMPLE_FUNC(UpsampleRgb565LinePair_NEON, Rgb565, 2) |
| #endif // WEBP_REDUCE_CSP |
| |
| //------------------------------------------------------------------------------ |
| // Entry point |
| |
| extern WebPUpsampleLinePairFunc WebPUpsamplers[/* MODE_LAST */]; |
| |
| extern void WebPInitUpsamplersNEON(void); |
| |
| WEBP_TSAN_IGNORE_FUNCTION void WebPInitUpsamplersNEON(void) { |
| WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePair_NEON; |
| WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePair_NEON; |
| WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair_NEON; |
| WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair_NEON; |
| #if !defined(WEBP_REDUCE_CSP) |
| WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePair_NEON; |
| WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePair_NEON; |
| WebPUpsamplers[MODE_ARGB] = UpsampleArgbLinePair_NEON; |
| WebPUpsamplers[MODE_Argb] = UpsampleArgbLinePair_NEON; |
| WebPUpsamplers[MODE_RGB_565] = UpsampleRgb565LinePair_NEON; |
| WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair_NEON; |
| WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair_NEON; |
| #endif // WEBP_REDUCE_CSP |
| } |
| |
| #endif // FANCY_UPSAMPLING |
| |
| #endif // WEBP_USE_NEON |
| |
| #if !(defined(FANCY_UPSAMPLING) && defined(WEBP_USE_NEON)) |
| WEBP_DSP_INIT_STUB(WebPInitUpsamplersNEON) |
| #endif |
