diff options
Diffstat (limited to 'media/libvpx/libvpx/vp9/encoder/arm/neon/vp9_quantize_neon.c')
| -rw-r--r-- | media/libvpx/libvpx/vp9/encoder/arm/neon/vp9_quantize_neon.c | 408 |
1 files changed, 408 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vp9/encoder/arm/neon/vp9_quantize_neon.c b/media/libvpx/libvpx/vp9/encoder/arm/neon/vp9_quantize_neon.c new file mode 100644 index 0000000000..97ab13628e --- /dev/null +++ b/media/libvpx/libvpx/vp9/encoder/arm/neon/vp9_quantize_neon.c @@ -0,0 +1,408 @@ +/* + * Copyright (c) 2014 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE 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. + */ + +#include <arm_neon.h> +#include <assert.h> +#include <math.h> + +#include "./vpx_config.h" +#include "vpx_mem/vpx_mem.h" + +#include "vp9/common/vp9_quant_common.h" +#include "vp9/common/vp9_seg_common.h" + +#include "vp9/encoder/vp9_encoder.h" +#include "vp9/encoder/vp9_quantize.h" +#include "vp9/encoder/vp9_rd.h" + +#include "vpx_dsp/arm/idct_neon.h" +#include "vpx_dsp/arm/mem_neon.h" +#include "vpx_dsp/vpx_dsp_common.h" + +static VPX_FORCE_INLINE void calculate_dqcoeff_and_store( + const int16x8_t qcoeff, const int16x8_t dequant, tran_low_t *dqcoeff) { + const int32x4_t dqcoeff_0 = + vmull_s16(vget_low_s16(qcoeff), vget_low_s16(dequant)); + const int32x4_t dqcoeff_1 = + vmull_s16(vget_high_s16(qcoeff), vget_high_s16(dequant)); + +#if CONFIG_VP9_HIGHBITDEPTH + vst1q_s32(dqcoeff, dqcoeff_0); + vst1q_s32(dqcoeff + 4, dqcoeff_1); +#else + vst1q_s16(dqcoeff, vcombine_s16(vmovn_s32(dqcoeff_0), vmovn_s32(dqcoeff_1))); +#endif // CONFIG_VP9_HIGHBITDEPTH +} + +static VPX_FORCE_INLINE int16x8_t get_max_lane_eob(const int16_t *iscan_ptr, + int16x8_t v_eobmax, + uint16x8_t v_nz_mask) { + const int16x8_t v_iscan = vld1q_s16(&iscan_ptr[0]); + const int16x8_t v_nz_iscan = vbslq_s16(v_nz_mask, vdupq_n_s16(0), v_iscan); + return vmaxq_s16(v_eobmax, v_nz_iscan); +} + +static VPX_FORCE_INLINE uint16_t get_max_eob(int16x8_t v_eobmax) { +#if VPX_ARCH_AARCH64 + return (uint16_t)vmaxvq_s16(v_eobmax); +#else + const int16x4_t v_eobmax_3210 = + vmax_s16(vget_low_s16(v_eobmax), vget_high_s16(v_eobmax)); + const int64x1_t v_eobmax_xx32 = + vshr_n_s64(vreinterpret_s64_s16(v_eobmax_3210), 32); + const int16x4_t v_eobmax_tmp = + vmax_s16(v_eobmax_3210, vreinterpret_s16_s64(v_eobmax_xx32)); + const int64x1_t v_eobmax_xxx3 = + vshr_n_s64(vreinterpret_s64_s16(v_eobmax_tmp), 16); + const int16x4_t v_eobmax_final = + vmax_s16(v_eobmax_tmp, vreinterpret_s16_s64(v_eobmax_xxx3)); + + return (uint16_t)vget_lane_s16(v_eobmax_final, 0); +#endif // VPX_ARCH_AARCH64 +} + +static VPX_FORCE_INLINE void load_fp_values(const int16_t *round_ptr, + const int16_t *quant_ptr, + const int16_t *dequant_ptr, + int16x8_t *round, int16x8_t *quant, + int16x8_t *dequant) { + *round = vld1q_s16(round_ptr); + *quant = vld1q_s16(quant_ptr); + *dequant = vld1q_s16(dequant_ptr); +} + +static VPX_FORCE_INLINE void update_fp_values(int16x8_t *v_round, + int16x8_t *v_quant, + int16x8_t *v_dequant) { +#if VPX_ARCH_AARCH64 + *v_round = vdupq_laneq_s16(*v_round, 1); + *v_quant = vdupq_laneq_s16(*v_quant, 1); + *v_dequant = vdupq_laneq_s16(*v_dequant, 1); +#else + *v_round = vdupq_lane_s16(vget_low_s16(*v_round), 1); + *v_quant = vdupq_lane_s16(vget_low_s16(*v_quant), 1); + *v_dequant = vdupq_lane_s16(vget_low_s16(*v_dequant), 1); +#endif +} + +static VPX_FORCE_INLINE void quantize_fp_8( + const int16x8_t *v_round, const int16x8_t *v_quant, + const int16x8_t *v_dequant, const tran_low_t *coeff_ptr, + const int16_t *iscan_ptr, tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, + int16x8_t *v_eobmax) { + const int16x8_t v_zero = vdupq_n_s16(0); + const int16x8_t v_coeff = load_tran_low_to_s16q(coeff_ptr); + const int16x8_t v_coeff_sign = vshrq_n_s16(v_coeff, 15); + const int16x8_t v_abs = vabsq_s16(v_coeff); + const int16x8_t v_tmp = vqaddq_s16(v_abs, *v_round); + const int32x4_t v_tmp_lo = + vmull_s16(vget_low_s16(v_tmp), vget_low_s16(*v_quant)); + const int32x4_t v_tmp_hi = + vmull_s16(vget_high_s16(v_tmp), vget_high_s16(*v_quant)); + const int16x8_t v_tmp2 = + vcombine_s16(vshrn_n_s32(v_tmp_lo, 16), vshrn_n_s32(v_tmp_hi, 16)); + const uint16x8_t v_nz_mask = vceqq_s16(v_tmp2, v_zero); + const int16x8_t v_qcoeff_a = veorq_s16(v_tmp2, v_coeff_sign); + const int16x8_t v_qcoeff = vsubq_s16(v_qcoeff_a, v_coeff_sign); + calculate_dqcoeff_and_store(v_qcoeff, *v_dequant, dqcoeff_ptr); + store_s16q_to_tran_low(qcoeff_ptr, v_qcoeff); + + *v_eobmax = get_max_lane_eob(iscan_ptr, *v_eobmax, v_nz_mask); +} + +void vp9_quantize_fp_neon(const tran_low_t *coeff_ptr, intptr_t count, + const int16_t *round_ptr, const int16_t *quant_ptr, + tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, + const int16_t *dequant_ptr, uint16_t *eob_ptr, + const int16_t *scan, const int16_t *iscan) { + // Quantization pass: All coefficients with index >= zero_flag are + // skippable. Note: zero_flag can be zero. + int i; + int16x8_t v_eobmax = vdupq_n_s16(-1); + int16x8_t v_round, v_quant, v_dequant; + (void)scan; + + load_fp_values(round_ptr, quant_ptr, dequant_ptr, &v_round, &v_quant, + &v_dequant); + // process dc and the first seven ac coeffs + quantize_fp_8(&v_round, &v_quant, &v_dequant, coeff_ptr, iscan, qcoeff_ptr, + dqcoeff_ptr, &v_eobmax); + + // now process the rest of the ac coeffs + update_fp_values(&v_round, &v_quant, &v_dequant); + for (i = 8; i < count; i += 8) { + quantize_fp_8(&v_round, &v_quant, &v_dequant, coeff_ptr + i, iscan + i, + qcoeff_ptr + i, dqcoeff_ptr + i, &v_eobmax); + } + + *eob_ptr = get_max_eob(v_eobmax); +} + +static INLINE int32x4_t extract_sign_bit(int32x4_t a) { + return vreinterpretq_s32_u32(vshrq_n_u32(vreinterpretq_u32_s32(a), 31)); +} + +static VPX_FORCE_INLINE void quantize_fp_32x32_8( + const int16x8_t *v_round, const int16x8_t *v_quant, + const int16x8_t *v_dequant, const int16x8_t *dequant_thresh, + const tran_low_t *coeff_ptr, const int16_t *iscan_ptr, + tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, int16x8_t *v_eobmax) { + const int16x8_t v_coeff = load_tran_low_to_s16q(coeff_ptr); + const int16x8_t v_coeff_sign = vshrq_n_s16(v_coeff, 15); + const int16x8_t v_coeff_abs = vabsq_s16(v_coeff); + const int16x8_t v_thr_mask = + vreinterpretq_s16_u16(vcgeq_s16(v_coeff_abs, *dequant_thresh)); + const int16x8_t v_tmp_rnd = + vandq_s16(vqaddq_s16(v_coeff_abs, *v_round), v_thr_mask); + const int16x8_t v_abs_qcoeff = vqdmulhq_s16(v_tmp_rnd, *v_quant); + const int16x8_t v_qcoeff = + vsubq_s16(veorq_s16(v_abs_qcoeff, v_coeff_sign), v_coeff_sign); + const uint16x8_t v_nz_mask = vceqq_s16(v_abs_qcoeff, vdupq_n_s16(0)); + + int32x4_t dqcoeff_0, dqcoeff_1; + dqcoeff_0 = vmull_s16(vget_low_s16(v_qcoeff), vget_low_s16(*v_dequant)); + dqcoeff_1 = vmull_s16(vget_high_s16(v_qcoeff), vget_high_s16(*v_dequant)); + // Add 1 if negative to round towards zero because the C uses division. + dqcoeff_0 = vaddq_s32(dqcoeff_0, extract_sign_bit(dqcoeff_0)); + dqcoeff_1 = vaddq_s32(dqcoeff_1, extract_sign_bit(dqcoeff_1)); + +#if CONFIG_VP9_HIGHBITDEPTH + vst1q_s32(dqcoeff_ptr, vshrq_n_s32(dqcoeff_0, 1)); + vst1q_s32(dqcoeff_ptr + 4, vshrq_n_s32(dqcoeff_1, 1)); +#else + store_s16q_to_tran_low(dqcoeff_ptr, vcombine_s16(vshrn_n_s32(dqcoeff_0, 1), + vshrn_n_s32(dqcoeff_1, 1))); +#endif + + store_s16q_to_tran_low(qcoeff_ptr, v_qcoeff); + + *v_eobmax = get_max_lane_eob(iscan_ptr, *v_eobmax, v_nz_mask); +} + +void vp9_quantize_fp_32x32_neon(const tran_low_t *coeff_ptr, intptr_t count, + const int16_t *round_ptr, + const int16_t *quant_ptr, + tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, + const int16_t *dequant_ptr, uint16_t *eob_ptr, + const int16_t *scan, const int16_t *iscan) { + int16x8_t eob_max = vdupq_n_s16(-1); + // ROUND_POWER_OF_TWO(round_ptr[], 1) + int16x8_t round = vrshrq_n_s16(vld1q_s16(round_ptr), 1); + int16x8_t quant = vld1q_s16(quant_ptr); + int16x8_t dequant = vld1q_s16(dequant_ptr); + // dequant >> 2 is used similar to zbin as a threshold. + int16x8_t dequant_thresh = vshrq_n_s16(vld1q_s16(dequant_ptr), 2); + int i; + + (void)scan; + (void)count; + + // Process dc and the first seven ac coeffs. + quantize_fp_32x32_8(&round, &quant, &dequant, &dequant_thresh, coeff_ptr, + iscan, qcoeff_ptr, dqcoeff_ptr, &eob_max); + + update_fp_values(&round, &quant, &dequant); + dequant_thresh = vdupq_lane_s16(vget_low_s16(dequant_thresh), 1); + + iscan += 8; + coeff_ptr += 8; + qcoeff_ptr += 8; + dqcoeff_ptr += 8; + + // Process the rest of the ac coeffs. + for (i = 8; i < 32 * 32; i += 8) { + quantize_fp_32x32_8(&round, &quant, &dequant, &dequant_thresh, coeff_ptr, + iscan, qcoeff_ptr, dqcoeff_ptr, &eob_max); + + iscan += 8; + coeff_ptr += 8; + qcoeff_ptr += 8; + dqcoeff_ptr += 8; + } + + *eob_ptr = get_max_eob(eob_max); +} + +#if CONFIG_VP9_HIGHBITDEPTH +static VPX_FORCE_INLINE uint16x4_t +highbd_quantize_fp_4(const tran_low_t *coeff_ptr, tran_low_t *qcoeff_ptr, + tran_low_t *dqcoeff_ptr, int32x4_t v_quant_s32, + int32x4_t v_dequant_s32, int32x4_t v_round_s32) { + const int32x4_t v_coeff = vld1q_s32(coeff_ptr); + const int32x4_t v_coeff_sign = + vreinterpretq_s32_u32(vcltq_s32(v_coeff, vdupq_n_s32(0))); + const int32x4_t v_abs_coeff = vabsq_s32(v_coeff); + const int32x4_t v_tmp = vaddq_s32(v_abs_coeff, v_round_s32); + // const int abs_qcoeff = (int)((tmp * quant) >> 16); + const int32x4_t v_abs_qcoeff = vqdmulhq_s32(v_tmp, v_quant_s32); + // qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign); + const int32x4_t v_qcoeff = + vsubq_s32(veorq_s32(v_abs_qcoeff, v_coeff_sign), v_coeff_sign); + const int32x4_t v_abs_dqcoeff = vmulq_s32(v_abs_qcoeff, v_dequant_s32); + // dqcoeff_ptr[rc] = (tran_low_t)((abs_dqcoeff ^ coeff_sign) - coeff_sign); + const int32x4_t v_dqcoeff = + vsubq_s32(veorq_s32(v_abs_dqcoeff, v_coeff_sign), v_coeff_sign); + + vst1q_s32(qcoeff_ptr, v_qcoeff); + vst1q_s32(dqcoeff_ptr, v_dqcoeff); + + // Packed nz_qcoeff_mask. Used to find eob. + return vmovn_u32(vceqq_s32(v_abs_qcoeff, vdupq_n_s32(0))); +} + +void vp9_highbd_quantize_fp_neon(const tran_low_t *coeff_ptr, intptr_t n_coeffs, + const int16_t *round_ptr, + const int16_t *quant_ptr, + tran_low_t *qcoeff_ptr, + tran_low_t *dqcoeff_ptr, + const int16_t *dequant_ptr, uint16_t *eob_ptr, + const int16_t *scan, const int16_t *iscan) { + const int16x4_t v_zero = vdup_n_s16(0); + const int16x4_t v_quant = vld1_s16(quant_ptr); + const int16x4_t v_dequant = vld1_s16(dequant_ptr); + const int16x4_t v_round = vld1_s16(round_ptr); + int32x4_t v_round_s32 = vaddl_s16(v_round, v_zero); + int32x4_t v_quant_s32 = vshlq_n_s32(vaddl_s16(v_quant, v_zero), 15); + int32x4_t v_dequant_s32 = vaddl_s16(v_dequant, v_zero); + uint16x4_t v_mask_lo, v_mask_hi; + int16x8_t v_eobmax = vdupq_n_s16(-1); + + (void)scan; + + // DC and first 3 AC + v_mask_lo = highbd_quantize_fp_4(coeff_ptr, qcoeff_ptr, dqcoeff_ptr, + v_quant_s32, v_dequant_s32, v_round_s32); + + // overwrite the DC constants with AC constants + v_round_s32 = vdupq_lane_s32(vget_low_s32(v_round_s32), 1); + v_quant_s32 = vdupq_lane_s32(vget_low_s32(v_quant_s32), 1); + v_dequant_s32 = vdupq_lane_s32(vget_low_s32(v_dequant_s32), 1); + + // 4 more AC + v_mask_hi = + highbd_quantize_fp_4(coeff_ptr + 4, qcoeff_ptr + 4, dqcoeff_ptr + 4, + v_quant_s32, v_dequant_s32, v_round_s32); + + // Find the max lane eob for the first 8 coeffs. + v_eobmax = + get_max_lane_eob(iscan, v_eobmax, vcombine_u16(v_mask_lo, v_mask_hi)); + + n_coeffs -= 8; + do { + coeff_ptr += 8; + qcoeff_ptr += 8; + dqcoeff_ptr += 8; + iscan += 8; + v_mask_lo = highbd_quantize_fp_4(coeff_ptr, qcoeff_ptr, dqcoeff_ptr, + v_quant_s32, v_dequant_s32, v_round_s32); + v_mask_hi = + highbd_quantize_fp_4(coeff_ptr + 4, qcoeff_ptr + 4, dqcoeff_ptr + 4, + v_quant_s32, v_dequant_s32, v_round_s32); + // Find the max lane eob for 8 coeffs. + v_eobmax = + get_max_lane_eob(iscan, v_eobmax, vcombine_u16(v_mask_lo, v_mask_hi)); + n_coeffs -= 8; + } while (n_coeffs); + + *eob_ptr = get_max_eob(v_eobmax); +} + +static VPX_FORCE_INLINE uint16x4_t +highbd_quantize_fp_32x32_4(const tran_low_t *coeff_ptr, tran_low_t *qcoeff_ptr, + tran_low_t *dqcoeff_ptr, int32x4_t v_quant_s32, + int32x4_t v_dequant_s32, int32x4_t v_round_s32) { + const int32x4_t v_coeff = vld1q_s32(coeff_ptr); + const int32x4_t v_coeff_sign = + vreinterpretq_s32_u32(vcltq_s32(v_coeff, vdupq_n_s32(0))); + const int32x4_t v_abs_coeff = vabsq_s32(v_coeff); + // ((abs_coeff << (1 + log_scale)) >= dequant_ptr[rc01]) + const int32x4_t v_abs_coeff_scaled = vshlq_n_s32(v_abs_coeff, 2); + const uint32x4_t v_mask = vcgeq_s32(v_abs_coeff_scaled, v_dequant_s32); + // const int64_t tmp = vmask ? (int64_t)abs_coeff + log_scaled_round : 0 + const int32x4_t v_tmp = vandq_s32(vaddq_s32(v_abs_coeff, v_round_s32), + vreinterpretq_s32_u32(v_mask)); + // const int abs_qcoeff = (int)((tmp * quant) >> (16 - log_scale)); + const int32x4_t v_abs_qcoeff = + vqdmulhq_s32(vshlq_n_s32(v_tmp, 1), v_quant_s32); + // qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign); + const int32x4_t v_qcoeff = + vsubq_s32(veorq_s32(v_abs_qcoeff, v_coeff_sign), v_coeff_sign); + // vshlq_s32 will shift right if shift value is negative. + const int32x4_t v_abs_dqcoeff = + vshrq_n_s32(vmulq_s32(v_abs_qcoeff, v_dequant_s32), 1); + // dqcoeff_ptr[rc] = (tran_low_t)((abs_dqcoeff ^ coeff_sign) - coeff_sign); + const int32x4_t v_dqcoeff = + vsubq_s32(veorq_s32(v_abs_dqcoeff, v_coeff_sign), v_coeff_sign); + + vst1q_s32(qcoeff_ptr, v_qcoeff); + vst1q_s32(dqcoeff_ptr, v_dqcoeff); + + // Packed nz_qcoeff_mask. Used to find eob. + return vmovn_u32(vceqq_s32(v_abs_qcoeff, vdupq_n_s32(0))); +} + +void vp9_highbd_quantize_fp_32x32_neon( + const tran_low_t *coeff_ptr, intptr_t n_coeffs, const int16_t *round_ptr, + const int16_t *quant_ptr, tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, + const int16_t *dequant_ptr, uint16_t *eob_ptr, const int16_t *scan, + const int16_t *iscan) { + const int16x4_t v_quant = vld1_s16(quant_ptr); + const int16x4_t v_dequant = vld1_s16(dequant_ptr); + const int16x4_t v_zero = vdup_n_s16(0); + const int16x4_t v_round = + vqrdmulh_n_s16(vld1_s16(round_ptr), (int16_t)(1 << 14)); + int32x4_t v_round_s32 = vaddl_s16(v_round, v_zero); + int32x4_t v_quant_s32 = vshlq_n_s32(vaddl_s16(v_quant, v_zero), 15); + int32x4_t v_dequant_s32 = vaddl_s16(v_dequant, v_zero); + uint16x4_t v_mask_lo, v_mask_hi; + int16x8_t v_eobmax = vdupq_n_s16(-1); + + (void)scan; + + // DC and first 3 AC + v_mask_lo = + highbd_quantize_fp_32x32_4(coeff_ptr, qcoeff_ptr, dqcoeff_ptr, + v_quant_s32, v_dequant_s32, v_round_s32); + + // overwrite the DC constants with AC constants + v_round_s32 = vdupq_lane_s32(vget_low_s32(v_round_s32), 1); + v_quant_s32 = vdupq_lane_s32(vget_low_s32(v_quant_s32), 1); + v_dequant_s32 = vdupq_lane_s32(vget_low_s32(v_dequant_s32), 1); + + // 4 more AC + v_mask_hi = + highbd_quantize_fp_32x32_4(coeff_ptr + 4, qcoeff_ptr + 4, dqcoeff_ptr + 4, + v_quant_s32, v_dequant_s32, v_round_s32); + + // Find the max lane eob for the first 8 coeffs. + v_eobmax = + get_max_lane_eob(iscan, v_eobmax, vcombine_u16(v_mask_lo, v_mask_hi)); + + n_coeffs -= 8; + do { + coeff_ptr += 8; + qcoeff_ptr += 8; + dqcoeff_ptr += 8; + iscan += 8; + v_mask_lo = + highbd_quantize_fp_32x32_4(coeff_ptr, qcoeff_ptr, dqcoeff_ptr, + v_quant_s32, v_dequant_s32, v_round_s32); + v_mask_hi = highbd_quantize_fp_32x32_4(coeff_ptr + 4, qcoeff_ptr + 4, + dqcoeff_ptr + 4, v_quant_s32, + v_dequant_s32, v_round_s32); + // Find the max lane eob for 8 coeffs. + v_eobmax = + get_max_lane_eob(iscan, v_eobmax, vcombine_u16(v_mask_lo, v_mask_hi)); + n_coeffs -= 8; + } while (n_coeffs); + + *eob_ptr = get_max_eob(v_eobmax); +} +#endif // CONFIG_VP9_HIGHBITDEPTH |