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Diffstat (limited to 'media/libvpx/libvpx/vpx_dsp/arm/highbd_idct4x4_add_neon.c')
-rw-r--r-- | media/libvpx/libvpx/vpx_dsp/arm/highbd_idct4x4_add_neon.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/arm/highbd_idct4x4_add_neon.c b/media/libvpx/libvpx/vpx_dsp/arm/highbd_idct4x4_add_neon.c new file mode 100644 index 0000000000..7be1dad1d3 --- /dev/null +++ b/media/libvpx/libvpx/vpx_dsp/arm/highbd_idct4x4_add_neon.c @@ -0,0 +1,89 @@ +/* + * Copyright (c) 2016 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 "./vpx_dsp_rtcd.h" +#include "vpx_dsp/arm/highbd_idct_neon.h" +#include "vpx_dsp/arm/idct_neon.h" +#include "vpx_dsp/inv_txfm.h" + +// res is in reverse row order +static INLINE void highbd_idct4x4_1_add_kernel2(uint16_t **dest, + const int stride, + const int16x8_t res, + const int16x8_t max) { + const uint16x4_t a0 = vld1_u16(*dest); + const uint16x4_t a1 = vld1_u16(*dest + stride); + const int16x8_t a = vreinterpretq_s16_u16(vcombine_u16(a1, a0)); + // Note: In some profile tests, res is quite close to +/-32767. + // We use saturating addition. + const int16x8_t b = vqaddq_s16(res, a); + const int16x8_t c = vminq_s16(b, max); + const uint16x8_t d = vqshluq_n_s16(c, 0); + vst1_u16(*dest, vget_high_u16(d)); + *dest += stride; + vst1_u16(*dest, vget_low_u16(d)); + *dest += stride; +} + +void vpx_highbd_idct4x4_1_add_neon(const tran_low_t *input, uint16_t *dest, + int stride, int bd) { + const int16x8_t max = vdupq_n_s16((1 << bd) - 1); + const tran_low_t out0 = HIGHBD_WRAPLOW( + dct_const_round_shift(input[0] * (tran_high_t)cospi_16_64), bd); + const tran_low_t out1 = HIGHBD_WRAPLOW( + dct_const_round_shift(out0 * (tran_high_t)cospi_16_64), bd); + const int16_t a1 = ROUND_POWER_OF_TWO(out1, 4); + const int16x8_t dc = vdupq_n_s16(a1); + + highbd_idct4x4_1_add_kernel1(&dest, stride, dc, max); + highbd_idct4x4_1_add_kernel1(&dest, stride, dc, max); +} + +void vpx_highbd_idct4x4_16_add_neon(const tran_low_t *input, uint16_t *dest, + int stride, int bd) { + const int16x8_t max = vdupq_n_s16((1 << bd) - 1); + int16x8_t a[2]; + int32x4_t c[4]; + + c[0] = vld1q_s32(input); + c[1] = vld1q_s32(input + 4); + c[2] = vld1q_s32(input + 8); + c[3] = vld1q_s32(input + 12); + + if (bd == 8) { + // Rows + a[0] = vcombine_s16(vmovn_s32(c[0]), vmovn_s32(c[1])); + a[1] = vcombine_s16(vmovn_s32(c[2]), vmovn_s32(c[3])); + transpose_idct4x4_16_bd8(a); + + // Columns + a[1] = vcombine_s16(vget_high_s16(a[1]), vget_low_s16(a[1])); + transpose_idct4x4_16_bd8(a); + a[0] = vrshrq_n_s16(a[0], 4); + a[1] = vrshrq_n_s16(a[1], 4); + } else { + const int32x4_t cospis = vld1q_s32(kCospi32); + + if (bd == 10) { + idct4x4_16_kernel_bd10(cospis, c); + idct4x4_16_kernel_bd10(cospis, c); + } else { + idct4x4_16_kernel_bd12(cospis, c); + idct4x4_16_kernel_bd12(cospis, c); + } + a[0] = vcombine_s16(vqrshrn_n_s32(c[0], 4), vqrshrn_n_s32(c[1], 4)); + a[1] = vcombine_s16(vqrshrn_n_s32(c[3], 4), vqrshrn_n_s32(c[2], 4)); + } + + highbd_idct4x4_1_add_kernel1(&dest, stride, a[0], max); + highbd_idct4x4_1_add_kernel2(&dest, stride, a[1], max); +} |