diff options
Diffstat (limited to 'third_party/aom/aom_dsp/aom_convolve.c')
| -rw-r--r-- | third_party/aom/aom_dsp/aom_convolve.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/aom_convolve.c b/third_party/aom/aom_dsp/aom_convolve.c index 4dac6aacc..c903ea52d 100644 --- a/third_party/aom/aom_dsp/aom_convolve.c +++ b/third_party/aom/aom_dsp/aom_convolve.c @@ -41,6 +41,29 @@ static void convolve_horiz(const uint8_t *src, ptrdiff_t src_stride, } } +static void convolve_horiz_scale_c(const uint8_t *src, ptrdiff_t src_stride, + uint8_t *dst, ptrdiff_t dst_stride, + const InterpKernel *x_filters, int x0_qn, + int x_step_qn, int w, int h) { + int x, y; + src -= SUBPEL_TAPS / 2 - 1; + for (y = 0; y < h; ++y) { + int x_qn = x0_qn; + for (x = 0; x < w; ++x) { + const uint8_t *const src_x = &src[x_qn >> SCALE_SUBPEL_BITS]; // q8 + const int x_filter_idx = (x_qn & SCALE_SUBPEL_MASK) >> SCALE_EXTRA_BITS; + assert(x_filter_idx < SUBPEL_SHIFTS); + const int16_t *const x_filter = x_filters[x_filter_idx]; + int k, sum = 0; + for (k = 0; k < SUBPEL_TAPS; ++k) sum += src_x[k] * x_filter[k]; + dst[x] = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); + x_qn += x_step_qn; + } + src += src_stride; + dst += dst_stride; + } +} + static void convolve_avg_horiz(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, ptrdiff_t dst_stride, const InterpKernel *x_filters, int x0_q4, @@ -63,6 +86,30 @@ static void convolve_avg_horiz(const uint8_t *src, ptrdiff_t src_stride, } } +static void convolve_avg_horiz_scale_c(const uint8_t *src, ptrdiff_t src_stride, + uint8_t *dst, ptrdiff_t dst_stride, + const InterpKernel *x_filters, int x0_qn, + int x_step_qn, int w, int h) { + int x, y; + src -= SUBPEL_TAPS / 2 - 1; + for (y = 0; y < h; ++y) { + int x_qn = x0_qn; + for (x = 0; x < w; ++x) { + const uint8_t *const src_x = &src[x_qn >> SCALE_SUBPEL_BITS]; + const int x_filter_idx = (x_qn & SCALE_SUBPEL_MASK) >> SCALE_EXTRA_BITS; + assert(x_filter_idx < SUBPEL_SHIFTS); + const int16_t *const x_filter = x_filters[x_filter_idx]; + int k, sum = 0; + for (k = 0; k < SUBPEL_TAPS; ++k) sum += src_x[k] * x_filter[k]; + dst[x] = ROUND_POWER_OF_TWO( + dst[x] + clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)), 1); + x_qn += x_step_qn; + } + src += src_stride; + dst += dst_stride; + } +} + static void convolve_vert(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, ptrdiff_t dst_stride, const InterpKernel *y_filters, int y0_q4, @@ -86,6 +133,31 @@ static void convolve_vert(const uint8_t *src, ptrdiff_t src_stride, } } +static void convolve_vert_scale_c(const uint8_t *src, ptrdiff_t src_stride, + uint8_t *dst, ptrdiff_t dst_stride, + const InterpKernel *y_filters, int y0_qn, + int y_step_qn, int w, int h) { + int x, y; + src -= src_stride * (SUBPEL_TAPS / 2 - 1); + + for (x = 0; x < w; ++x) { + int y_qn = y0_qn; + for (y = 0; y < h; ++y) { + const unsigned char *src_y = + &src[(y_qn >> SCALE_SUBPEL_BITS) * src_stride]; + const int16_t *const y_filter = + y_filters[(y_qn & SCALE_SUBPEL_MASK) >> SCALE_EXTRA_BITS]; + int k, sum = 0; + for (k = 0; k < SUBPEL_TAPS; ++k) + sum += src_y[k * src_stride] * y_filter[k]; + dst[y * dst_stride] = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); + y_qn += y_step_qn; + } + ++src; + ++dst; + } +} + static void convolve_avg_vert(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, ptrdiff_t dst_stride, const InterpKernel *y_filters, int y0_q4, @@ -112,6 +184,34 @@ static void convolve_avg_vert(const uint8_t *src, ptrdiff_t src_stride, } } +static void convolve_avg_vert_scale_c(const uint8_t *src, ptrdiff_t src_stride, + uint8_t *dst, ptrdiff_t dst_stride, + const InterpKernel *y_filters, int y0_qn, + int y_step_qn, int w, int h) { + int x, y; + src -= src_stride * (SUBPEL_TAPS / 2 - 1); + + for (x = 0; x < w; ++x) { + int y_qn = y0_qn; + for (y = 0; y < h; ++y) { + const unsigned char *src_y = + &src[(y_qn >> SCALE_SUBPEL_BITS) * src_stride]; + const int16_t *const y_filter = + y_filters[(y_qn & SCALE_SUBPEL_MASK) >> SCALE_EXTRA_BITS]; + int k, sum = 0; + for (k = 0; k < SUBPEL_TAPS; ++k) + sum += src_y[k * src_stride] * y_filter[k]; + dst[y * dst_stride] = ROUND_POWER_OF_TWO( + dst[y * dst_stride] + + clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)), + 1); + y_qn += y_step_qn; + } + ++src; + ++dst; + } +} + static void convolve(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, ptrdiff_t dst_stride, const InterpKernel *const x_filters, int x0_q4, int x_step_q4, @@ -146,6 +246,41 @@ static void convolve(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, dst_stride, y_filters, y0_q4, y_step_q4, w, h); } +static void convolve_scale_c(const uint8_t *src, ptrdiff_t src_stride, + uint8_t *dst, ptrdiff_t dst_stride, + const InterpKernel *const x_filters, int x0_qn, + int x_step_qn, const InterpKernel *const y_filters, + int y0_qn, int y_step_qn, int w, int h) { + // TODO(afergs): Update comment here + // Note: Fixed size intermediate buffer, temp, places limits on parameters. + // 2d filtering proceeds in 2 steps: + // (1) Interpolate horizontally into an intermediate buffer, temp. + // (2) Interpolate temp vertically to derive the sub-pixel result. + // Deriving the maximum number of rows in the temp buffer (135): + // --Smallest scaling factor is x1/2 ==> y_step_qn = 32 (Normative). + // --Largest block size is 64x64 pixels. + // --64 rows in the downscaled frame span a distance of (64 - 1) * 32 in the + // original frame (in 1/16th pixel units). + // --Must round-up because block may be located at sub-pixel position. + // --Require an additional SUBPEL_TAPS rows for the 8-tap filter tails. + // --((64 - 1) * 32 + 15) >> 4 + 8 = 135. + uint8_t temp[MAX_EXT_SIZE * MAX_SB_SIZE]; + int intermediate_height = + (((h - 1) * y_step_qn + y0_qn) >> SCALE_SUBPEL_BITS) + SUBPEL_TAPS; + + assert(w <= MAX_SB_SIZE); + assert(h <= MAX_SB_SIZE); + + assert(y_step_qn <= SCALE_SUBPEL_BITS * 2); + assert(x_step_qn <= SCALE_SUBPEL_BITS * 2); + + convolve_horiz_scale_c(src - src_stride * (SUBPEL_TAPS / 2 - 1), src_stride, + temp, MAX_SB_SIZE, x_filters, x0_qn, x_step_qn, w, + intermediate_height); + convolve_vert_scale_c(temp + MAX_SB_SIZE * (SUBPEL_TAPS / 2 - 1), MAX_SB_SIZE, + dst, dst_stride, y_filters, y0_qn, y_step_qn, w, h); +} + static const InterpKernel *get_filter_base(const int16_t *filter) { // NOTE: This assumes that the filter table is 256-byte aligned. // TODO(agrange) Modify to make independent of table alignment. @@ -171,6 +306,21 @@ void aom_convolve8_horiz_c(const uint8_t *src, ptrdiff_t src_stride, w, h); } +void aom_convolve8_horiz_scale_c(const uint8_t *src, ptrdiff_t src_stride, + uint8_t *dst, ptrdiff_t dst_stride, + const int16_t *filter_x, int subpel_x, + int x_step_qn, const int16_t *filter_y, + int subpel_y, int y_step_qn, int w, int h) { + const InterpKernel *const filters_x = get_filter_base(filter_x); + + (void)subpel_y; + (void)filter_y; + (void)y_step_qn; + + convolve_horiz_scale_c(src, src_stride, dst, dst_stride, filters_x, subpel_x, + x_step_qn, w, h); +} + void aom_convolve8_avg_horiz_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, @@ -186,6 +336,22 @@ void aom_convolve8_avg_horiz_c(const uint8_t *src, ptrdiff_t src_stride, x_step_q4, w, h); } +void aom_convolve8_avg_horiz_scale_c(const uint8_t *src, ptrdiff_t src_stride, + uint8_t *dst, ptrdiff_t dst_stride, + const int16_t *filter_x, int subpel_x, + int x_step_qn, const int16_t *filter_y, + int subpel_y, int y_step_qn, int w, + int h) { + const InterpKernel *const filters_x = get_filter_base(filter_x); + + (void)subpel_y; + (void)filter_y; + (void)y_step_qn; + + convolve_avg_horiz_scale_c(src, src_stride, dst, dst_stride, filters_x, + subpel_x, x_step_qn, w, h); +} + void aom_convolve8_vert_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, @@ -201,6 +367,21 @@ void aom_convolve8_vert_c(const uint8_t *src, ptrdiff_t src_stride, w, h); } +void aom_convolve8_vert_scale_c(const uint8_t *src, ptrdiff_t src_stride, + uint8_t *dst, ptrdiff_t dst_stride, + const int16_t *filter_x, int subpel_x, + int x_step_qn, const int16_t *filter_y, + int subpel_y, int y_step_qn, int w, int h) { + const InterpKernel *const filters_y = get_filter_base(filter_y); + + (void)subpel_x; + (void)filter_x; + (void)x_step_qn; + + convolve_vert_scale_c(src, src_stride, dst, dst_stride, filters_y, subpel_y, + y_step_qn, w, h); +} + void aom_convolve8_avg_vert_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, @@ -216,6 +397,21 @@ void aom_convolve8_avg_vert_c(const uint8_t *src, ptrdiff_t src_stride, y_step_q4, w, h); } +void aom_convolve8_avg_vert_scale_c(const uint8_t *src, ptrdiff_t src_stride, + uint8_t *dst, ptrdiff_t dst_stride, + const int16_t *filter_x, int subpel_x, + int x_step_qn, const int16_t *filter_y, + int subpel_y, int y_step_qn, int w, int h) { + const InterpKernel *const filters_y = get_filter_base(filter_y); + + (void)subpel_x; + (void)filter_x; + (void)x_step_qn; + + convolve_avg_vert_scale_c(src, src_stride, dst, dst_stride, filters_y, + subpel_y, y_step_qn, w, h); +} + void aom_convolve8_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, @@ -230,6 +426,19 @@ void aom_convolve8_c(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, filters_y, y0_q4, y_step_q4, w, h); } +void aom_convolve8_scale_c(const uint8_t *src, ptrdiff_t src_stride, + uint8_t *dst, ptrdiff_t dst_stride, + const int16_t *filter_x, int subpel_x, int x_step_qn, + const int16_t *filter_y, int subpel_y, int y_step_qn, + int w, int h) { + const InterpKernel *const filters_x = get_filter_base(filter_x); + + const InterpKernel *const filters_y = get_filter_base(filter_y); + + convolve_scale_c(src, src_stride, dst, dst_stride, filters_x, subpel_x, + x_step_qn, filters_y, subpel_y, y_step_qn, w, h); +} + void aom_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, @@ -245,6 +454,22 @@ void aom_convolve8_avg_c(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, h); } +void aom_convolve8_avg_scale_c(const uint8_t *src, ptrdiff_t src_stride, + uint8_t *dst, ptrdiff_t dst_stride, + const int16_t *filter_x, int subpel_x, + int x_step_qn, const int16_t *filter_y, + int subpel_y, int y_step_qn, int w, int h) { + /* Fixed size intermediate buffer places limits on parameters. */ + DECLARE_ALIGNED(16, uint8_t, temp[MAX_SB_SIZE * MAX_SB_SIZE]); + assert(w <= MAX_SB_SIZE); + assert(h <= MAX_SB_SIZE); + + aom_convolve8_scale_c(src, src_stride, temp, MAX_SB_SIZE, filter_x, subpel_x, + x_step_qn, filter_y, subpel_y, y_step_qn, w, h); + aom_convolve_avg_c(temp, MAX_SB_SIZE, dst, dst_stride, NULL, 0, NULL, 0, w, + h); +} + void aom_convolve_copy_c(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, ptrdiff_t dst_stride, const int16_t *filter_x, int filter_x_stride, const int16_t *filter_y, @@ -332,6 +557,7 @@ void aom_scaled_avg_2d_c(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, filter_y, y_step_q4, w, h); } +// TODO(afergs): Make sure this works too #if CONFIG_LOOP_RESTORATION static void convolve_add_src_horiz(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, ptrdiff_t dst_stride, @@ -569,6 +795,7 @@ void aom_convolve8_add_src_hip_c(const uint8_t *src, ptrdiff_t src_stride, } #endif // CONFIG_LOOP_RESTORATION +// TODO(afergs): Make sure this works too #if CONFIG_HIGHBITDEPTH static void highbd_convolve_horiz(const uint8_t *src8, ptrdiff_t src_stride, uint8_t *dst8, ptrdiff_t dst_stride, |