diff options
Diffstat (limited to 'media/libvpx/vp9/encoder/vp9_resize.c')
| -rw-r--r-- | media/libvpx/vp9/encoder/vp9_resize.c | 925 |
1 files changed, 925 insertions, 0 deletions
diff --git a/media/libvpx/vp9/encoder/vp9_resize.c b/media/libvpx/vp9/encoder/vp9_resize.c new file mode 100644 index 000000000..bca5b1326 --- /dev/null +++ b/media/libvpx/vp9/encoder/vp9_resize.c @@ -0,0 +1,925 @@ +/* + * 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 <assert.h> +#include <limits.h> +#include <math.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "vpx_ports/mem.h" +#include "vp9/common/vp9_common.h" +#include "vp9/encoder/vp9_resize.h" + +#define FILTER_BITS 7 + +#define INTERP_TAPS 8 +#define SUBPEL_BITS 5 +#define SUBPEL_MASK ((1 << SUBPEL_BITS) - 1) +#define INTERP_PRECISION_BITS 32 + +typedef int16_t interp_kernel[INTERP_TAPS]; + +// Filters for interpolation (0.5-band) - note this also filters integer pels. +const interp_kernel vp9_filteredinterp_filters500[(1 << SUBPEL_BITS)] = { + {-3, 0, 35, 64, 35, 0, -3, 0}, + {-3, -1, 34, 64, 36, 1, -3, 0}, + {-3, -1, 32, 64, 38, 1, -3, 0}, + {-2, -2, 31, 63, 39, 2, -3, 0}, + {-2, -2, 29, 63, 41, 2, -3, 0}, + {-2, -2, 28, 63, 42, 3, -4, 0}, + {-2, -3, 27, 63, 43, 4, -4, 0}, + {-2, -3, 25, 62, 45, 5, -4, 0}, + {-2, -3, 24, 62, 46, 5, -4, 0}, + {-2, -3, 23, 61, 47, 6, -4, 0}, + {-2, -3, 21, 60, 49, 7, -4, 0}, + {-1, -4, 20, 60, 50, 8, -4, -1}, + {-1, -4, 19, 59, 51, 9, -4, -1}, + {-1, -4, 17, 58, 52, 10, -4, 0}, + {-1, -4, 16, 57, 53, 12, -4, -1}, + {-1, -4, 15, 56, 54, 13, -4, -1}, + {-1, -4, 14, 55, 55, 14, -4, -1}, + {-1, -4, 13, 54, 56, 15, -4, -1}, + {-1, -4, 12, 53, 57, 16, -4, -1}, + {0, -4, 10, 52, 58, 17, -4, -1}, + {-1, -4, 9, 51, 59, 19, -4, -1}, + {-1, -4, 8, 50, 60, 20, -4, -1}, + {0, -4, 7, 49, 60, 21, -3, -2}, + {0, -4, 6, 47, 61, 23, -3, -2}, + {0, -4, 5, 46, 62, 24, -3, -2}, + {0, -4, 5, 45, 62, 25, -3, -2}, + {0, -4, 4, 43, 63, 27, -3, -2}, + {0, -4, 3, 42, 63, 28, -2, -2}, + {0, -3, 2, 41, 63, 29, -2, -2}, + {0, -3, 2, 39, 63, 31, -2, -2}, + {0, -3, 1, 38, 64, 32, -1, -3}, + {0, -3, 1, 36, 64, 34, -1, -3} +}; + +// Filters for interpolation (0.625-band) - note this also filters integer pels. +const interp_kernel vp9_filteredinterp_filters625[(1 << SUBPEL_BITS)] = { + {-1, -8, 33, 80, 33, -8, -1, 0}, + {-1, -8, 30, 80, 35, -8, -1, 1}, + {-1, -8, 28, 80, 37, -7, -2, 1}, + {0, -8, 26, 79, 39, -7, -2, 1}, + {0, -8, 24, 79, 41, -7, -2, 1}, + {0, -8, 22, 78, 43, -6, -2, 1}, + {0, -8, 20, 78, 45, -5, -3, 1}, + {0, -8, 18, 77, 48, -5, -3, 1}, + {0, -8, 16, 76, 50, -4, -3, 1}, + {0, -8, 15, 75, 52, -3, -4, 1}, + {0, -7, 13, 74, 54, -3, -4, 1}, + {0, -7, 11, 73, 56, -2, -4, 1}, + {0, -7, 10, 71, 58, -1, -4, 1}, + {1, -7, 8, 70, 60, 0, -5, 1}, + {1, -6, 6, 68, 62, 1, -5, 1}, + {1, -6, 5, 67, 63, 2, -5, 1}, + {1, -6, 4, 65, 65, 4, -6, 1}, + {1, -5, 2, 63, 67, 5, -6, 1}, + {1, -5, 1, 62, 68, 6, -6, 1}, + {1, -5, 0, 60, 70, 8, -7, 1}, + {1, -4, -1, 58, 71, 10, -7, 0}, + {1, -4, -2, 56, 73, 11, -7, 0}, + {1, -4, -3, 54, 74, 13, -7, 0}, + {1, -4, -3, 52, 75, 15, -8, 0}, + {1, -3, -4, 50, 76, 16, -8, 0}, + {1, -3, -5, 48, 77, 18, -8, 0}, + {1, -3, -5, 45, 78, 20, -8, 0}, + {1, -2, -6, 43, 78, 22, -8, 0}, + {1, -2, -7, 41, 79, 24, -8, 0}, + {1, -2, -7, 39, 79, 26, -8, 0}, + {1, -2, -7, 37, 80, 28, -8, -1}, + {1, -1, -8, 35, 80, 30, -8, -1}, +}; + +// Filters for interpolation (0.75-band) - note this also filters integer pels. +const interp_kernel vp9_filteredinterp_filters750[(1 << SUBPEL_BITS)] = { + {2, -11, 25, 96, 25, -11, 2, 0}, + {2, -11, 22, 96, 28, -11, 2, 0}, + {2, -10, 19, 95, 31, -11, 2, 0}, + {2, -10, 17, 95, 34, -12, 2, 0}, + {2, -9, 14, 94, 37, -12, 2, 0}, + {2, -8, 12, 93, 40, -12, 1, 0}, + {2, -8, 9, 92, 43, -12, 1, 1}, + {2, -7, 7, 91, 46, -12, 1, 0}, + {2, -7, 5, 90, 49, -12, 1, 0}, + {2, -6, 3, 88, 52, -12, 0, 1}, + {2, -5, 1, 86, 55, -12, 0, 1}, + {2, -5, -1, 84, 58, -11, 0, 1}, + {2, -4, -2, 82, 61, -11, -1, 1}, + {2, -4, -4, 80, 64, -10, -1, 1}, + {1, -3, -5, 77, 67, -9, -1, 1}, + {1, -3, -6, 75, 70, -8, -2, 1}, + {1, -2, -7, 72, 72, -7, -2, 1}, + {1, -2, -8, 70, 75, -6, -3, 1}, + {1, -1, -9, 67, 77, -5, -3, 1}, + {1, -1, -10, 64, 80, -4, -4, 2}, + {1, -1, -11, 61, 82, -2, -4, 2}, + {1, 0, -11, 58, 84, -1, -5, 2}, + {1, 0, -12, 55, 86, 1, -5, 2}, + {1, 0, -12, 52, 88, 3, -6, 2}, + {0, 1, -12, 49, 90, 5, -7, 2}, + {0, 1, -12, 46, 91, 7, -7, 2}, + {1, 1, -12, 43, 92, 9, -8, 2}, + {0, 1, -12, 40, 93, 12, -8, 2}, + {0, 2, -12, 37, 94, 14, -9, 2}, + {0, 2, -12, 34, 95, 17, -10, 2}, + {0, 2, -11, 31, 95, 19, -10, 2}, + {0, 2, -11, 28, 96, 22, -11, 2} +}; + +// Filters for interpolation (0.875-band) - note this also filters integer pels. +const interp_kernel vp9_filteredinterp_filters875[(1 << SUBPEL_BITS)] = { + {3, -8, 13, 112, 13, -8, 3, 0}, + {3, -7, 10, 112, 17, -9, 3, -1}, + {2, -6, 7, 111, 21, -9, 3, -1}, + {2, -5, 4, 111, 24, -10, 3, -1}, + {2, -4, 1, 110, 28, -11, 3, -1}, + {1, -3, -1, 108, 32, -12, 4, -1}, + {1, -2, -3, 106, 36, -13, 4, -1}, + {1, -1, -6, 105, 40, -14, 4, -1}, + {1, -1, -7, 102, 44, -14, 4, -1}, + {1, 0, -9, 100, 48, -15, 4, -1}, + {1, 1, -11, 97, 53, -16, 4, -1}, + {0, 1, -12, 95, 57, -16, 4, -1}, + {0, 2, -13, 91, 61, -16, 4, -1}, + {0, 2, -14, 88, 65, -16, 4, -1}, + {0, 3, -15, 84, 69, -17, 4, 0}, + {0, 3, -16, 81, 73, -16, 3, 0}, + {0, 3, -16, 77, 77, -16, 3, 0}, + {0, 3, -16, 73, 81, -16, 3, 0}, + {0, 4, -17, 69, 84, -15, 3, 0}, + {-1, 4, -16, 65, 88, -14, 2, 0}, + {-1, 4, -16, 61, 91, -13, 2, 0}, + {-1, 4, -16, 57, 95, -12, 1, 0}, + {-1, 4, -16, 53, 97, -11, 1, 1}, + {-1, 4, -15, 48, 100, -9, 0, 1}, + {-1, 4, -14, 44, 102, -7, -1, 1}, + {-1, 4, -14, 40, 105, -6, -1, 1}, + {-1, 4, -13, 36, 106, -3, -2, 1}, + {-1, 4, -12, 32, 108, -1, -3, 1}, + {-1, 3, -11, 28, 110, 1, -4, 2}, + {-1, 3, -10, 24, 111, 4, -5, 2}, + {-1, 3, -9, 21, 111, 7, -6, 2}, + {-1, 3, -9, 17, 112, 10, -7, 3} +}; + +// Filters for interpolation (full-band) - no filtering for integer pixels +const interp_kernel vp9_filteredinterp_filters1000[(1 << SUBPEL_BITS)] = { + {0, 0, 0, 128, 0, 0, 0, 0}, + {0, 1, -3, 128, 3, -1, 0, 0}, + {-1, 2, -6, 127, 7, -2, 1, 0}, + {-1, 3, -9, 126, 12, -4, 1, 0}, + {-1, 4, -12, 125, 16, -5, 1, 0}, + {-1, 4, -14, 123, 20, -6, 2, 0}, + {-1, 5, -15, 120, 25, -8, 2, 0}, + {-1, 5, -17, 118, 30, -9, 3, -1}, + {-1, 6, -18, 114, 35, -10, 3, -1}, + {-1, 6, -19, 111, 41, -12, 3, -1}, + {-1, 6, -20, 107, 46, -13, 4, -1}, + {-1, 6, -21, 103, 52, -14, 4, -1}, + {-1, 6, -21, 99, 57, -16, 5, -1}, + {-1, 6, -21, 94, 63, -17, 5, -1}, + {-1, 6, -20, 89, 68, -18, 5, -1}, + {-1, 6, -20, 84, 73, -19, 6, -1}, + {-1, 6, -20, 79, 79, -20, 6, -1}, + {-1, 6, -19, 73, 84, -20, 6, -1}, + {-1, 5, -18, 68, 89, -20, 6, -1}, + {-1, 5, -17, 63, 94, -21, 6, -1}, + {-1, 5, -16, 57, 99, -21, 6, -1}, + {-1, 4, -14, 52, 103, -21, 6, -1}, + {-1, 4, -13, 46, 107, -20, 6, -1}, + {-1, 3, -12, 41, 111, -19, 6, -1}, + {-1, 3, -10, 35, 114, -18, 6, -1}, + {-1, 3, -9, 30, 118, -17, 5, -1}, + {0, 2, -8, 25, 120, -15, 5, -1}, + {0, 2, -6, 20, 123, -14, 4, -1}, + {0, 1, -5, 16, 125, -12, 4, -1}, + {0, 1, -4, 12, 126, -9, 3, -1}, + {0, 1, -2, 7, 127, -6, 2, -1}, + {0, 0, -1, 3, 128, -3, 1, 0} +}; + +// Filters for factor of 2 downsampling. +static const int16_t vp9_down2_symeven_half_filter[] = {56, 12, -3, -1}; +static const int16_t vp9_down2_symodd_half_filter[] = {64, 35, 0, -3}; + +static const interp_kernel *choose_interp_filter(int inlength, int outlength) { + int outlength16 = outlength * 16; + if (outlength16 >= inlength * 16) + return vp9_filteredinterp_filters1000; + else if (outlength16 >= inlength * 13) + return vp9_filteredinterp_filters875; + else if (outlength16 >= inlength * 11) + return vp9_filteredinterp_filters750; + else if (outlength16 >= inlength * 9) + return vp9_filteredinterp_filters625; + else + return vp9_filteredinterp_filters500; +} + +static void interpolate(const uint8_t *const input, int inlength, + uint8_t *output, int outlength) { + const int64_t delta = (((uint64_t)inlength << 32) + outlength / 2) / + outlength; + const int64_t offset = inlength > outlength ? + (((int64_t)(inlength - outlength) << 31) + outlength / 2) / outlength : + -(((int64_t)(outlength - inlength) << 31) + outlength / 2) / outlength; + uint8_t *optr = output; + int x, x1, x2, sum, k, int_pel, sub_pel; + int64_t y; + + const interp_kernel *interp_filters = + choose_interp_filter(inlength, outlength); + + x = 0; + y = offset; + while ((y >> INTERP_PRECISION_BITS) < (INTERP_TAPS / 2 - 1)) { + x++; + y += delta; + } + x1 = x; + x = outlength - 1; + y = delta * x + offset; + while ((y >> INTERP_PRECISION_BITS) + + (int64_t)(INTERP_TAPS / 2) >= inlength) { + x--; + y -= delta; + } + x2 = x; + if (x1 > x2) { + for (x = 0, y = offset; x < outlength; ++x, y += delta) { + const int16_t *filter; + int_pel = y >> INTERP_PRECISION_BITS; + sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK; + filter = interp_filters[sub_pel]; + sum = 0; + for (k = 0; k < INTERP_TAPS; ++k) { + const int pk = int_pel - INTERP_TAPS / 2 + 1 + k; + sum += filter[k] * input[(pk < 0 ? 0 : + (pk >= inlength ? inlength - 1 : pk))]; + } + *optr++ = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); + } + } else { + // Initial part. + for (x = 0, y = offset; x < x1; ++x, y += delta) { + const int16_t *filter; + int_pel = y >> INTERP_PRECISION_BITS; + sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK; + filter = interp_filters[sub_pel]; + sum = 0; + for (k = 0; k < INTERP_TAPS; ++k) + sum += filter[k] * input[(int_pel - INTERP_TAPS / 2 + 1 + k < 0 ? + 0 : + int_pel - INTERP_TAPS / 2 + 1 + k)]; + *optr++ = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); + } + // Middle part. + for (; x <= x2; ++x, y += delta) { + const int16_t *filter; + int_pel = y >> INTERP_PRECISION_BITS; + sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK; + filter = interp_filters[sub_pel]; + sum = 0; + for (k = 0; k < INTERP_TAPS; ++k) + sum += filter[k] * input[int_pel - INTERP_TAPS / 2 + 1 + k]; + *optr++ = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); + } + // End part. + for (; x < outlength; ++x, y += delta) { + const int16_t *filter; + int_pel = y >> INTERP_PRECISION_BITS; + sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK; + filter = interp_filters[sub_pel]; + sum = 0; + for (k = 0; k < INTERP_TAPS; ++k) + sum += filter[k] * input[(int_pel - INTERP_TAPS / 2 + 1 + k >= + inlength ? inlength - 1 : + int_pel - INTERP_TAPS / 2 + 1 + k)]; + *optr++ = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); + } + } +} + +static void down2_symeven(const uint8_t *const input, int length, + uint8_t *output) { + // Actual filter len = 2 * filter_len_half. + const int16_t *filter = vp9_down2_symeven_half_filter; + const int filter_len_half = sizeof(vp9_down2_symeven_half_filter) / 2; + int i, j; + uint8_t *optr = output; + int l1 = filter_len_half; + int l2 = (length - filter_len_half); + l1 += (l1 & 1); + l2 += (l2 & 1); + if (l1 > l2) { + // Short input length. + for (i = 0; i < length; i += 2) { + int sum = (1 << (FILTER_BITS - 1)); + for (j = 0; j < filter_len_half; ++j) { + sum += (input[(i - j < 0 ? 0 : i - j)] + + input[(i + 1 + j >= length ? length - 1 : i + 1 + j)]) * + filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel(sum); + } + } else { + // Initial part. + for (i = 0; i < l1; i += 2) { + int sum = (1 << (FILTER_BITS - 1)); + for (j = 0; j < filter_len_half; ++j) { + sum += (input[(i - j < 0 ? 0 : i - j)] + input[i + 1 + j]) * filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel(sum); + } + // Middle part. + for (; i < l2; i += 2) { + int sum = (1 << (FILTER_BITS - 1)); + for (j = 0; j < filter_len_half; ++j) { + sum += (input[i - j] + input[i + 1 + j]) * filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel(sum); + } + // End part. + for (; i < length; i += 2) { + int sum = (1 << (FILTER_BITS - 1)); + for (j = 0; j < filter_len_half; ++j) { + sum += (input[i - j] + + input[(i + 1 + j >= length ? length - 1 : i + 1 + j)]) * + filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel(sum); + } + } +} + +static void down2_symodd(const uint8_t *const input, int length, + uint8_t *output) { + // Actual filter len = 2 * filter_len_half - 1. + const int16_t *filter = vp9_down2_symodd_half_filter; + const int filter_len_half = sizeof(vp9_down2_symodd_half_filter) / 2; + int i, j; + uint8_t *optr = output; + int l1 = filter_len_half - 1; + int l2 = (length - filter_len_half + 1); + l1 += (l1 & 1); + l2 += (l2 & 1); + if (l1 > l2) { + // Short input length. + for (i = 0; i < length; i += 2) { + int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0]; + for (j = 1; j < filter_len_half; ++j) { + sum += (input[(i - j < 0 ? 0 : i - j)] + + input[(i + j >= length ? length - 1 : i + j)]) * + filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel(sum); + } + } else { + // Initial part. + for (i = 0; i < l1; i += 2) { + int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0]; + for (j = 1; j < filter_len_half; ++j) { + sum += (input[(i - j < 0 ? 0 : i - j)] + input[i + j]) * filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel(sum); + } + // Middle part. + for (; i < l2; i += 2) { + int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0]; + for (j = 1; j < filter_len_half; ++j) { + sum += (input[i - j] + input[i + j]) * filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel(sum); + } + // End part. + for (; i < length; i += 2) { + int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0]; + for (j = 1; j < filter_len_half; ++j) { + sum += (input[i - j] + input[(i + j >= length ? length - 1 : i + j)]) * + filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel(sum); + } + } +} + +static int get_down2_length(int length, int steps) { + int s; + for (s = 0; s < steps; ++s) + length = (length + 1) >> 1; + return length; +} + +static int get_down2_steps(int in_length, int out_length) { + int steps = 0; + int proj_in_length; + while ((proj_in_length = get_down2_length(in_length, 1)) >= out_length) { + ++steps; + in_length = proj_in_length; + } + return steps; +} + +static void resize_multistep(const uint8_t *const input, + int length, + uint8_t *output, + int olength, + uint8_t *buf) { + int steps; + if (length == olength) { + memcpy(output, input, sizeof(uint8_t) * length); + return; + } + steps = get_down2_steps(length, olength); + + if (steps > 0) { + int s; + uint8_t *out = NULL; + uint8_t *tmpbuf = NULL; + uint8_t *otmp, *otmp2; + int filteredlength = length; + if (!tmpbuf) { + tmpbuf = (uint8_t *)malloc(sizeof(uint8_t) * length); + otmp = tmpbuf; + } else { + otmp = buf; + } + otmp2 = otmp + get_down2_length(length, 1); + for (s = 0; s < steps; ++s) { + const int proj_filteredlength = get_down2_length(filteredlength, 1); + const uint8_t *const in = (s == 0 ? input : out); + if (s == steps - 1 && proj_filteredlength == olength) + out = output; + else + out = (s & 1 ? otmp2 : otmp); + if (filteredlength & 1) + down2_symodd(in, filteredlength, out); + else + down2_symeven(in, filteredlength, out); + filteredlength = proj_filteredlength; + } + if (filteredlength != olength) { + interpolate(out, filteredlength, output, olength); + } + if (tmpbuf) + free(tmpbuf); + } else { + interpolate(input, length, output, olength); + } +} + +static void fill_col_to_arr(uint8_t *img, int stride, int len, uint8_t *arr) { + int i; + uint8_t *iptr = img; + uint8_t *aptr = arr; + for (i = 0; i < len; ++i, iptr += stride) { + *aptr++ = *iptr; + } +} + +static void fill_arr_to_col(uint8_t *img, int stride, int len, uint8_t *arr) { + int i; + uint8_t *iptr = img; + uint8_t *aptr = arr; + for (i = 0; i < len; ++i, iptr += stride) { + *iptr = *aptr++; + } +} + +void vp9_resize_plane(const uint8_t *const input, + int height, + int width, + int in_stride, + uint8_t *output, + int height2, + int width2, + int out_stride) { + int i; + uint8_t *intbuf = (uint8_t *)malloc(sizeof(uint8_t) * width2 * height); + uint8_t *tmpbuf = (uint8_t *)malloc(sizeof(uint8_t) * + (width < height ? height : width)); + uint8_t *arrbuf = (uint8_t *)malloc(sizeof(uint8_t) * (height + height2)); + assert(width > 0); + assert(height > 0); + assert(width2 > 0); + assert(height2 > 0); + for (i = 0; i < height; ++i) + resize_multistep(input + in_stride * i, width, + intbuf + width2 * i, width2, tmpbuf); + for (i = 0; i < width2; ++i) { + fill_col_to_arr(intbuf + i, width2, height, arrbuf); + resize_multistep(arrbuf, height, arrbuf + height, height2, tmpbuf); + fill_arr_to_col(output + i, out_stride, height2, arrbuf + height); + } + free(intbuf); + free(tmpbuf); + free(arrbuf); +} + +#if CONFIG_VP9_HIGHBITDEPTH +static void highbd_interpolate(const uint16_t *const input, int inlength, + uint16_t *output, int outlength, int bd) { + const int64_t delta = + (((uint64_t)inlength << 32) + outlength / 2) / outlength; + const int64_t offset = inlength > outlength ? + (((int64_t)(inlength - outlength) << 31) + outlength / 2) / outlength : + -(((int64_t)(outlength - inlength) << 31) + outlength / 2) / outlength; + uint16_t *optr = output; + int x, x1, x2, sum, k, int_pel, sub_pel; + int64_t y; + + const interp_kernel *interp_filters = + choose_interp_filter(inlength, outlength); + + x = 0; + y = offset; + while ((y >> INTERP_PRECISION_BITS) < (INTERP_TAPS / 2 - 1)) { + x++; + y += delta; + } + x1 = x; + x = outlength - 1; + y = delta * x + offset; + while ((y >> INTERP_PRECISION_BITS) + + (int64_t)(INTERP_TAPS / 2) >= inlength) { + x--; + y -= delta; + } + x2 = x; + if (x1 > x2) { + for (x = 0, y = offset; x < outlength; ++x, y += delta) { + const int16_t *filter; + int_pel = y >> INTERP_PRECISION_BITS; + sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK; + filter = interp_filters[sub_pel]; + sum = 0; + for (k = 0; k < INTERP_TAPS; ++k) { + const int pk = int_pel - INTERP_TAPS / 2 + 1 + k; + sum += filter[k] * + input[(pk < 0 ? 0 : (pk >= inlength ? inlength - 1 : pk))]; + } + *optr++ = clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd); + } + } else { + // Initial part. + for (x = 0, y = offset; x < x1; ++x, y += delta) { + const int16_t *filter; + int_pel = y >> INTERP_PRECISION_BITS; + sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK; + filter = interp_filters[sub_pel]; + sum = 0; + for (k = 0; k < INTERP_TAPS; ++k) + sum += filter[k] * + input[(int_pel - INTERP_TAPS / 2 + 1 + k < 0 ? + 0 : int_pel - INTERP_TAPS / 2 + 1 + k)]; + *optr++ = clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd); + } + // Middle part. + for (; x <= x2; ++x, y += delta) { + const int16_t *filter; + int_pel = y >> INTERP_PRECISION_BITS; + sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK; + filter = interp_filters[sub_pel]; + sum = 0; + for (k = 0; k < INTERP_TAPS; ++k) + sum += filter[k] * input[int_pel - INTERP_TAPS / 2 + 1 + k]; + *optr++ = clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd); + } + // End part. + for (; x < outlength; ++x, y += delta) { + const int16_t *filter; + int_pel = y >> INTERP_PRECISION_BITS; + sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK; + filter = interp_filters[sub_pel]; + sum = 0; + for (k = 0; k < INTERP_TAPS; ++k) + sum += filter[k] * input[(int_pel - INTERP_TAPS / 2 + 1 + k >= + inlength ? inlength - 1 : + int_pel - INTERP_TAPS / 2 + 1 + k)]; + *optr++ = clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd); + } + } +} + +static void highbd_down2_symeven(const uint16_t *const input, int length, + uint16_t *output, int bd) { + // Actual filter len = 2 * filter_len_half. + static const int16_t *filter = vp9_down2_symeven_half_filter; + const int filter_len_half = sizeof(vp9_down2_symeven_half_filter) / 2; + int i, j; + uint16_t *optr = output; + int l1 = filter_len_half; + int l2 = (length - filter_len_half); + l1 += (l1 & 1); + l2 += (l2 & 1); + if (l1 > l2) { + // Short input length. + for (i = 0; i < length; i += 2) { + int sum = (1 << (FILTER_BITS - 1)); + for (j = 0; j < filter_len_half; ++j) { + sum += (input[(i - j < 0 ? 0 : i - j)] + + input[(i + 1 + j >= length ? length - 1 : i + 1 + j)]) * + filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel_highbd(sum, bd); + } + } else { + // Initial part. + for (i = 0; i < l1; i += 2) { + int sum = (1 << (FILTER_BITS - 1)); + for (j = 0; j < filter_len_half; ++j) { + sum += (input[(i - j < 0 ? 0 : i - j)] + input[i + 1 + j]) * filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel_highbd(sum, bd); + } + // Middle part. + for (; i < l2; i += 2) { + int sum = (1 << (FILTER_BITS - 1)); + for (j = 0; j < filter_len_half; ++j) { + sum += (input[i - j] + input[i + 1 + j]) * filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel_highbd(sum, bd); + } + // End part. + for (; i < length; i += 2) { + int sum = (1 << (FILTER_BITS - 1)); + for (j = 0; j < filter_len_half; ++j) { + sum += (input[i - j] + + input[(i + 1 + j >= length ? length - 1 : i + 1 + j)]) * + filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel_highbd(sum, bd); + } + } +} + +static void highbd_down2_symodd(const uint16_t *const input, int length, + uint16_t *output, int bd) { + // Actual filter len = 2 * filter_len_half - 1. + static const int16_t *filter = vp9_down2_symodd_half_filter; + const int filter_len_half = sizeof(vp9_down2_symodd_half_filter) / 2; + int i, j; + uint16_t *optr = output; + int l1 = filter_len_half - 1; + int l2 = (length - filter_len_half + 1); + l1 += (l1 & 1); + l2 += (l2 & 1); + if (l1 > l2) { + // Short input length. + for (i = 0; i < length; i += 2) { + int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0]; + for (j = 1; j < filter_len_half; ++j) { + sum += (input[(i - j < 0 ? 0 : i - j)] + + input[(i + j >= length ? length - 1 : i + j)]) * + filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel_highbd(sum, bd); + } + } else { + // Initial part. + for (i = 0; i < l1; i += 2) { + int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0]; + for (j = 1; j < filter_len_half; ++j) { + sum += (input[(i - j < 0 ? 0 : i - j)] + input[i + j]) * filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel_highbd(sum, bd); + } + // Middle part. + for (; i < l2; i += 2) { + int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0]; + for (j = 1; j < filter_len_half; ++j) { + sum += (input[i - j] + input[i + j]) * filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel_highbd(sum, bd); + } + // End part. + for (; i < length; i += 2) { + int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0]; + for (j = 1; j < filter_len_half; ++j) { + sum += (input[i - j] + input[(i + j >= length ? length - 1 : i + j)]) * + filter[j]; + } + sum >>= FILTER_BITS; + *optr++ = clip_pixel_highbd(sum, bd); + } + } +} + +static void highbd_resize_multistep(const uint16_t *const input, + int length, + uint16_t *output, + int olength, + uint16_t *buf, + int bd) { + int steps; + if (length == olength) { + memcpy(output, input, sizeof(uint16_t) * length); + return; + } + steps = get_down2_steps(length, olength); + + if (steps > 0) { + int s; + uint16_t *out = NULL; + uint16_t *tmpbuf = NULL; + uint16_t *otmp, *otmp2; + int filteredlength = length; + if (!tmpbuf) { + tmpbuf = (uint16_t *)malloc(sizeof(uint16_t) * length); + otmp = tmpbuf; + } else { + otmp = buf; + } + otmp2 = otmp + get_down2_length(length, 1); + for (s = 0; s < steps; ++s) { + const int proj_filteredlength = get_down2_length(filteredlength, 1); + const uint16_t *const in = (s == 0 ? input : out); + if (s == steps - 1 && proj_filteredlength == olength) + out = output; + else + out = (s & 1 ? otmp2 : otmp); + if (filteredlength & 1) + highbd_down2_symodd(in, filteredlength, out, bd); + else + highbd_down2_symeven(in, filteredlength, out, bd); + filteredlength = proj_filteredlength; + } + if (filteredlength != olength) { + highbd_interpolate(out, filteredlength, output, olength, bd); + } + if (tmpbuf) + free(tmpbuf); + } else { + highbd_interpolate(input, length, output, olength, bd); + } +} + +static void highbd_fill_col_to_arr(uint16_t *img, int stride, int len, + uint16_t *arr) { + int i; + uint16_t *iptr = img; + uint16_t *aptr = arr; + for (i = 0; i < len; ++i, iptr += stride) { + *aptr++ = *iptr; + } +} + +static void highbd_fill_arr_to_col(uint16_t *img, int stride, int len, + uint16_t *arr) { + int i; + uint16_t *iptr = img; + uint16_t *aptr = arr; + for (i = 0; i < len; ++i, iptr += stride) { + *iptr = *aptr++; + } +} + +void vp9_highbd_resize_plane(const uint8_t *const input, + int height, + int width, + int in_stride, + uint8_t *output, + int height2, + int width2, + int out_stride, + int bd) { + int i; + uint16_t *intbuf = (uint16_t *)malloc(sizeof(uint16_t) * width2 * height); + uint16_t *tmpbuf = (uint16_t *)malloc(sizeof(uint16_t) * + (width < height ? height : width)); + uint16_t *arrbuf = (uint16_t *)malloc(sizeof(uint16_t) * (height + height2)); + for (i = 0; i < height; ++i) { + highbd_resize_multistep(CONVERT_TO_SHORTPTR(input + in_stride * i), width, + intbuf + width2 * i, width2, tmpbuf, bd); + } + for (i = 0; i < width2; ++i) { + highbd_fill_col_to_arr(intbuf + i, width2, height, arrbuf); + highbd_resize_multistep(arrbuf, height, arrbuf + height, height2, tmpbuf, + bd); + highbd_fill_arr_to_col(CONVERT_TO_SHORTPTR(output + i), out_stride, height2, + arrbuf + height); + } + free(intbuf); + free(tmpbuf); + free(arrbuf); +} +#endif // CONFIG_VP9_HIGHBITDEPTH + +void vp9_resize_frame420(const uint8_t *const y, + int y_stride, + const uint8_t *const u, const uint8_t *const v, + int uv_stride, + int height, int width, + uint8_t *oy, int oy_stride, + uint8_t *ou, uint8_t *ov, int ouv_stride, + int oheight, int owidth) { + vp9_resize_plane(y, height, width, y_stride, + oy, oheight, owidth, oy_stride); + vp9_resize_plane(u, height / 2, width / 2, uv_stride, + ou, oheight / 2, owidth / 2, ouv_stride); + vp9_resize_plane(v, height / 2, width / 2, uv_stride, + ov, oheight / 2, owidth / 2, ouv_stride); +} + +void vp9_resize_frame422(const uint8_t *const y, int y_stride, + const uint8_t *const u, const uint8_t *const v, + int uv_stride, + int height, int width, + uint8_t *oy, int oy_stride, + uint8_t *ou, uint8_t *ov, int ouv_stride, + int oheight, int owidth) { + vp9_resize_plane(y, height, width, y_stride, + oy, oheight, owidth, oy_stride); + vp9_resize_plane(u, height, width / 2, uv_stride, + ou, oheight, owidth / 2, ouv_stride); + vp9_resize_plane(v, height, width / 2, uv_stride, + ov, oheight, owidth / 2, ouv_stride); +} + +void vp9_resize_frame444(const uint8_t *const y, int y_stride, + const uint8_t *const u, const uint8_t *const v, + int uv_stride, + int height, int width, + uint8_t *oy, int oy_stride, + uint8_t *ou, uint8_t *ov, int ouv_stride, + int oheight, int owidth) { + vp9_resize_plane(y, height, width, y_stride, + oy, oheight, owidth, oy_stride); + vp9_resize_plane(u, height, width, uv_stride, + ou, oheight, owidth, ouv_stride); + vp9_resize_plane(v, height, width, uv_stride, + ov, oheight, owidth, ouv_stride); +} + +#if CONFIG_VP9_HIGHBITDEPTH +void vp9_highbd_resize_frame420(const uint8_t *const y, + int y_stride, + const uint8_t *const u, const uint8_t *const v, + int uv_stride, + int height, int width, + uint8_t *oy, int oy_stride, + uint8_t *ou, uint8_t *ov, int ouv_stride, + int oheight, int owidth, int bd) { + vp9_highbd_resize_plane(y, height, width, y_stride, + oy, oheight, owidth, oy_stride, bd); + vp9_highbd_resize_plane(u, height / 2, width / 2, uv_stride, + ou, oheight / 2, owidth / 2, ouv_stride, bd); + vp9_highbd_resize_plane(v, height / 2, width / 2, uv_stride, + ov, oheight / 2, owidth / 2, ouv_stride, bd); +} + +void vp9_highbd_resize_frame422(const uint8_t *const y, int y_stride, + const uint8_t *const u, const uint8_t *const v, + int uv_stride, + int height, int width, + uint8_t *oy, int oy_stride, + uint8_t *ou, uint8_t *ov, int ouv_stride, + int oheight, int owidth, int bd) { + vp9_highbd_resize_plane(y, height, width, y_stride, + oy, oheight, owidth, oy_stride, bd); + vp9_highbd_resize_plane(u, height, width / 2, uv_stride, + ou, oheight, owidth / 2, ouv_stride, bd); + vp9_highbd_resize_plane(v, height, width / 2, uv_stride, + ov, oheight, owidth / 2, ouv_stride, bd); +} + +void vp9_highbd_resize_frame444(const uint8_t *const y, int y_stride, + const uint8_t *const u, const uint8_t *const v, + int uv_stride, + int height, int width, + uint8_t *oy, int oy_stride, + uint8_t *ou, uint8_t *ov, int ouv_stride, + int oheight, int owidth, int bd) { + vp9_highbd_resize_plane(y, height, width, y_stride, + oy, oheight, owidth, oy_stride, bd); + vp9_highbd_resize_plane(u, height, width, uv_stride, + ou, oheight, owidth, ouv_stride, bd); + vp9_highbd_resize_plane(v, height, width, uv_stride, + ov, oheight, owidth, ouv_stride, bd); +} +#endif // CONFIG_VP9_HIGHBITDEPTH |