void vp9_convolve8_avg_c(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) { /* Fixed size intermediate buffer places limits on parameters. */ DECLARE_ALIGNED_ARRAY(16, uint8_t, temp, 64 * 64); vp9_convolve8_c(src, src_stride, temp, 64, filter_x, x_step_q4, filter_y, y_step_q4, w, h); vp9_convolve_avg_c(temp, 64, dst, dst_stride, NULL, 0, NULL, 0, w, h); }
void vp9_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; if (x_step_q4 != 16 || y_step_q4 != 16) { vp9_convolve8_c(src, src_stride, dst, dst_stride, filter_x, x_step_q4, filter_y, y_step_q4, w, h); return; } /* 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. */ vp9_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 */ vp9_convolve8_vert_neon(temp + 64 * 3, 64, dst, dst_stride, filter_x, x_step_q4, filter_y, y_step_q4, w, h); }