diff options
Diffstat (limited to 'third_party/aom/aom_dsp/arm/aom_convolve_neon.c')
-rw-r--r-- | third_party/aom/aom_dsp/arm/aom_convolve_neon.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/arm/aom_convolve_neon.c b/third_party/aom/aom_dsp/arm/aom_convolve_neon.c new file mode 100644 index 000000000..6c2997e04 --- /dev/null +++ b/third_party/aom/aom_dsp/arm/aom_convolve_neon.c @@ -0,0 +1,66 @@ +/* + * Copyright (c) 2016, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#include <assert.h> + +#include "./aom_dsp_rtcd.h" +#include "aom_dsp/aom_dsp_common.h" +#include "aom_ports/mem.h" + +void aom_convolve8_neon(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, + ptrdiff_t dst_stride, const int16_t *filter_x, + int x_step_q4, const int16_t *filter_y, int y_step_q4, + int w, int h) { + /* Given our constraints: w <= 64, h <= 64, taps == 8 we can reduce the + * maximum buffer size to 64 * 64 + 7 (+ 1 to make it divisible by 4). + */ + DECLARE_ALIGNED(8, uint8_t, temp[64 * 72]); + + // Account for the vertical phase needing 3 lines prior and 4 lines post + int intermediate_height = h + 7; + + assert(y_step_q4 == 16); + assert(x_step_q4 == 16); + + /* Filter starting 3 lines back. The neon implementation will ignore the + * given height and filter a multiple of 4 lines. Since this goes in to + * the temp buffer which has lots of extra room and is subsequently discarded + * this is safe if somewhat less than ideal. + */ + aom_convolve8_horiz_neon(src - src_stride * 3, src_stride, temp, 64, filter_x, + x_step_q4, filter_y, y_step_q4, w, + intermediate_height); + + /* Step into the temp buffer 3 lines to get the actual frame data */ + aom_convolve8_vert_neon(temp + 64 * 3, 64, dst, dst_stride, filter_x, + x_step_q4, filter_y, y_step_q4, w, h); +} + +void aom_convolve8_avg_neon(const uint8_t *src, ptrdiff_t src_stride, + uint8_t *dst, ptrdiff_t dst_stride, + const int16_t *filter_x, int x_step_q4, + const int16_t *filter_y, int y_step_q4, int w, + int h) { + DECLARE_ALIGNED(8, uint8_t, temp[64 * 72]); + int intermediate_height = h + 7; + + assert(y_step_q4 == 16); + assert(x_step_q4 == 16); + + /* This implementation has the same issues as above. In addition, we only want + * to average the values after both passes. + */ + aom_convolve8_horiz_neon(src - src_stride * 3, src_stride, temp, 64, filter_x, + x_step_q4, filter_y, y_step_q4, w, + intermediate_height); + aom_convolve8_avg_vert_neon(temp + 64 * 3, 64, dst, dst_stride, filter_x, + x_step_q4, filter_y, y_step_q4, w, h); +} |