/*
* 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.
*/
/*!\file
* \brief Describes film grain parameters and film grain synthesis
*
*/
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include "aom_dsp/aom_dsp_common.h"
#include "aom_mem/aom_mem.h"
#include "av1/decoder/grain_synthesis.h"
// Samples with Gaussian distribution in the range of [-2048, 2047] (12 bits)
// with zero mean and standard deviation of about 512.
// should be divided by 4 for 10-bit range and 16 for 8-bit range.
static const int gaussian_sequence[2048] = {
56, 568, -180, 172, 124, -84, 172, -64, -900, 24, 820,
224, 1248, 996, 272, -8, -916, -388, -732, -104, -188, 800,
112, -652, -320, -376, 140, -252, 492, -168, 44, -788, 588,
-584, 500, -228, 12, 680, 272, -476, 972, -100, 652, 368,
432, -196, -720, -192, 1000, -332, 652, -136, -552, -604, -4,
192, -220, -136, 1000, -52, 372, -96, -624, 124, -24, 396,
540, -12, -104, 640, 464, 244, -208, -84, 368, -528, -740,
248, -968, -848, 608, 376, -60, -292, -40, -156, 252, -292,
248, 224, -280, 400, -244, 244, -60, 76, -80, 212, 532,
340, 128, -36, 824, -352, -60, -264, -96, -612, 416, -704,
220, -204, 640, -160, 1220, -408, 900, 336, 20, -336, -96,
-792, 304, 48, -28, -1232, -1172, -448, 104, -292, -520, 244,
60, -948, 0, -708, 268, 108, 356, -548, 488, -344, -136,
488, -196, -224, 656, -236, -1128, 60, 4, 140, 276, -676,
-376, 168, -108, 464, 8, 564, 64, 240, 308, -300, -400,
-456, -136, 56, 120, -408, -116, 436, 504, -232, 328, 844,
-164, -84, 784, -168, 232, -224, 348, -376, 128, 568, 96,
-1244, -288, 276, 848, 832, -360, 656, 464, -384, -332, -356,
728, -388, 160, -192, 468, 296, 224, 140, -776, -100, 280,
4, 196, 44, -36, -648, 932, 16, 1428, 28, 528, 808,
772, 20, 268, 88, -332, -284, 124, -384, -448, 208, -228,
-1044, -328, 660, 380, -148, -300, 588, 240, 540, 28, 136,
-88, -436, 256, 296, -1000, 1400, 0, -48, 1056, -136, 264,
-528, -1108, 632, -484, -592, -344, 796, 124, -668, -768, 388,
1296, -232, -188, -200, -288, -4, 308, 100, -168, 256, -500,
204, -508, 648, -136, 372, -272, -120, -1004, -552, -548, -384,
548, -296, 428, -108, -8, -912, -324, -224, -88, -112, -220,
-100, 996, -796, 548, 360, -216, 180, 428, -200, -212, 148,
96, 148, 284, 216, -412, -320, 120, -300, -384, -604, -572,
-332, -8, -180, -176, 696, 116, -88, 628, 76, 44, -516,
240, -208, -40, 100, -592, 344, -308, -452, -228, 20, 916,
-1752, -136, -340, -804, 140, 40, 512, 340, 248, 184, -492,
896, -156, 932, -628, 328, -688, -448, -616, -752, -100, 560,
-1020, 180, -800, -64, 76, 576, 1068, 396, 660, 552, -108,
-28, 320, -628, 312, -92, -92, -472, 268, 16, 560, 516,
-672, -52, 492, -100, 260, 384, 284, 292, 304, -148, 88,
-152, 1012, 1064, -228, 164, -376, -684, 592, -392, 156, 196,
-524, -64, -884, 160, -176, 636, 648, 404, -396, -436, 864,
424, -728, 988, -604, 904, -592, 296, -224, 536, -176, -920,
436, -48, 1176, -884, 416, -776, -824, -884, 524, -548, -564,
-68, -164, -96, 692, 364, -692, -1012, -68, 260, -480, 876,
-1116, 452, -332, -352, 892, -1088, 1220, -676, 12, -292, 244,
496, 372, -32, 280, 200, 112, -440, -96, 24, -644, -184,
56, -432, 224, -980, 272, -260, 144, -436, 420, 356, 364,
-528, 76, 172, -744, -368, 404, -752, -416, 684, -688, 72,
540, 416, 92, 444, 480, -72, -1416, 164, -1172, -68, 24,
424, 264, 1040, 128, -912, -524, -356, 64, 876, -12, 4,
-88, 532, 272, -524, 320, 276, -508, 940, 24, -400, -120,
756, 60, 236, -412, 100, 376, -484, 400, -100, -740, -108,
-260, 328, -268, 224, -200, -416, 184, -604, -564, -20, 296,
60, 892, -888, 60, 164, 68, -760, 216, -296, 904, -336,
-28, 404, -356, -568, -208, -1480, -512, 296, 328, -360, -164,
-1560, -776, 1156, -428, 164, -504, -112, 120, -216, -148, -264,
308, 32, 64, -72, 72, 116, 176, -64, -272, 460, -536,
-784, -280, 348, 108, -752, -132, 524, -540, -776, 116, -296,
-1196, -288, -560, 1040, -472, 116, -848, -1116, 116, 636, 696,
284, -176, 1016, 204, -864, -648, -248, 356, 972, -584, -204,
264, 880, 528, -24, -184, 116, 448, -144, 828, 524, 212,
-212, 52, 12, 200, 268, -488, -404, -880, 824, -672, -40,
908, -248, 500, 716, -576, 492, -576, 16, 720, -108, 384,
124, 344, 280, 576, -500, 252, 104, -308, 196, -188, -8,
1268, 296, 1032, -1196, 436, 316, 372, -432, -200, -660, 704,
-224, 596, -132, 268, 32, -452, 884, 104, -1008, 424, -1348,
-280, 4, -1168, 368, 476, 696, 300, -8, 24, 180, -592,
-196, 388, 304, 500, 724, -160, 244, -84, 272, -256, -420,
320, 208, -144, -156, 156, 364, 452, 28, 540, 316, 220,
-644, -248, 464, 72, 360, 32, -388, 496, -680, -48, 208,
-116, -408, 60, -604, -392, 548, -840, 784, -460, 656, -544,
-388, -264, 908, -800, -628, -612, -568, 572, -220, 164, 288,
-16, -308, 308, -112, -636, -760, 280, -668, 432, 364, 240,
-196, 604, 340, 384, 196, 592, -44, -500, 432, -580, -132,
636, -76, 392, 4, -412, 540, 508, 328, -356, -36, 16,
-220, -64, -248, -60, 24, -192, 368, 1040, 92, -24, -1044,
-32, 40, 104, 148, 192, -136, -520, 56, -816, -224, 732,
392, 356, 212, -80, -424, -1008, -324, 588, -1496, 576, 460,
-816, -848, 56, -580, -92, -1372, -112, -496, 200, 364, 52,
-140, 48, -48, -60, 84, 72, 40, 132, -356, -268, -104,
-284, -404, 732, -520, 164, -304, -540, 120, 328, -76, -460,
756, 388, 588, 236, -436, -72, -176, -404, -316, -148, 716,
-604, 404, -72, -88, -888, -68, 944, 88, -220, -344, 960,
472, 460, -232, 704, 120, 832, -228, 692, -508, 132, -476,
844, -748, -364, -44, 1116, -1104, -1056, 76, 428, 552, -692,
60, 356, 96, -384, -188, -612, -576, 736, 508, 892, 352,
-1132, 504, -24, -352, 324, 332, -600, -312, 292, 508, -144,
-8, 484, 48, 284, -260, -240, 256, -100, -292, -204, -44,
472, -204, 908, -188, -1000, -256, 92, 1164, -392, 564, 356,
652, -28, -884, 256, 484, -192, 760, -176, 376, -524, -452,
-436, 860, -736, 212, 124, 504, -476, 468, 76, -472, 552,
-692, -944, -620, 740, -240, 400, 132, 20, 192, -196, 264,
-668, -1012, -60, 296, -316, -828, 76, -156, 284, -768, -448,
-832, 148, 248, 652, 616, 1236, 288, -328, -400, -124, 588,
220, 520, -696, 1032, 768, -740, -92, -272, 296, 448, -464,
412, -200, 392, 440, -200, 264, -152, -260, 320, 1032, 216,
320, -8, -64, 156, -1016, 1084, 1172, 536, 484, -432, 132,
372, -52, -256, 84, 116, -352, 48, 116, 304, -384, 412,
924, -300, 528, 628, 180, 648, 44, -980, -220, 1320, 48,
332, 748, 524, -268, -720, 540, -276, 564, -344, -208, -196,
436, 896, 88, -392, 132, 80, -964, -288, 568, 56, -48,
-456, 888, 8, 552, -156, -292, 948, 288, 128, -716, -292,
1192, -152, 876, 352, -600, -260, -812, -468, -28, -120, -32,
-44, 1284, 496, 192, 464, 312, -76, -516, -380, -456, -1012,
-48, 308, -156, 36, 492, -156, -808, 188, 1652, 68, -120,
-116, 316, 160, -140, 352, 808, -416, 592, 316, -480, 56,
528, -204, -568, 372, -232, 752, -344, 744, -4, 324, -416,
-600, 768, 268, -248, -88, -132, -420, -432, 80, -288, 404,
-316, -1216, -588, 520, -108, 92, -320, 368, -480, -216, -92,
1688, -300, 180, 1020, -176, 820, -68, -228, -260, 436, -904,
20, 40, -508, 440, -736, 312, 332, 204, 760, -372, 728,
96, -20, -632, -520, -560, 336, 1076, -64, -532, 776, 584,
192, 396, -728, -520, 276, -188, 80, -52, -612, -252, -48,
648, 212, -688, 228, -52, -260, 428, -412, -272, -404, 180,
816, -796, 48, 152, 484, -88, -216, 988, 696, 188, -528,
648, -116, -180, 316, 476, 12, -564, 96, 476, -252, -364,
-376, -392, 556, -256, -576, 260, -352, 120, -16, -136, -260,
-492, 72, 556, 660, 580, 616, 772, 436, 424, -32, -324,
-1268, 416, -324, -80, 920, 160, 228, 724, 32, -516, 64,
384, 68, -128, 136, 240, 248, -204, -68, 252, -932, -120,
-480, -628, -84, 192, 852, -404, -288, -132, 204, 100, 168,
-68, -196, -868, 460, 1080, 380, -80, 244, 0, 484, -888,
64, 184, 352, 600, 460, 164, 604, -196, 320, -64, 588,
-184, 228, 12, 372, 48, -848, -344, 224, 208, -200, 484,
128, -20, 272, -468, -840, 384, 256, -720, -520, -464, -580,
112, -120, 644, -356, -208, -608, -528, 704, 560, -424, 392,
828, 40, 84, 200, -152, 0, -144, 584, 280, -120, 80,
-556, -972, -196, -472, 724, 80, 168, -32, 88, 160, -688,
0, 160, 356, 372, -776, 740, -128, 676, -248, -480, 4,
-364, 96, 544, 232, -1032, 956, 236, 356, 20, -40, 300,
24, -676, -596, 132, 1120, -104, 532, -1096, 568, 648, 444,
508, 380, 188, -376, -604, 1488, 424, 24, 756, -220, -192,
716, 120, 920, 688, 168, 44, -460, 568, 284, 1144, 1160,
600, 424, 888, 656, -356, -320, 220, 316, -176, -724, -188,
-816, -628, -348, -228, -380, 1012, -452, -660, 736, 928, 404,
-696, -72, -268, -892, 128, 184, -344, -780, 360, 336, 400,
344, 428, 548, -112, 136, -228, -216, -820, -516, 340, 92,
-136, 116, -300, 376, -244, 100, -316, -520, -284, -12, 824,
164, -548, -180, -128, 116, -924, -828, 268, -368, -580, 620,
192, 160, 0, -1676, 1068, 424, -56, -360, 468, -156, 720,
288, -528, 556, -364, 548, -148, 504, 316, 152, -648, -620,
-684, -24, -376, -384, -108, -920, -1032, 768, 180, -264, -508,
-1268, -260, -60, 300, -240, 988, 724, -376, -576, -212, -736,
556, 192, 1092, -620, -880, 376, -56, -4, -216, -32, 836,
268, 396, 1332, 864, -600, 100, 56, -412, -92, 356, 180,
884, -468, -436, 292, -388, -804, -704, -840, 368, -348, 140,
-724, 1536, 940, 372, 112, -372, 436, -480, 1136, 296, -32,
-228, 132, -48, -220, 868, -1016, -60, -1044, -464, 328, 916,
244, 12, -736, -296, 360, 468, -376, -108, -92, 788, 368,
-56, 544, 400, -672, -420, 728, 16, 320, 44, -284, -380,
-796, 488, 132, 204, -596, -372, 88, -152, -908, -636, -572,
-624, -116, -692, -200, -56, 276, -88, 484, -324, 948, 864,
1000, -456, -184, -276, 292, -296, 156, 676, 320, 160, 908,
-84, -1236, -288, -116, 260, -372, -644, 732, -756, -96, 84,
344, -520, 348, -688, 240, -84, 216, -1044, -136, -676, -396,
-1500, 960, -40, 176, 168, 1516, 420, -504, -344, -364, -360,
1216, -940, -380, -212, 252, -660, -708, 484, -444, -152, 928,
-120, 1112, 476, -260, 560, -148, -344, 108, -196, 228, -288,
504, 560, -328, -88, 288, -1008, 460, -228, 468, -836, -196,
76, 388, 232, 412, -1168, -716, -644, 756, -172, -356, -504,
116, 432, 528, 48, 476, -168, -608, 448, 160, -532, -272,
28, -676, -12, 828, 980, 456, 520, 104, -104, 256, -344,
-4, -28, -368, -52, -524, -572, -556, -200, 768, 1124, -208,
-512, 176, 232, 248, -148, -888, 604, -600, -304, 804, -156,
-212, 488, -192, -804, -256, 368, -360, -916, -328, 228, -240,
-448, -472, 856, -556, -364, 572, -12, -156, -368, -340, 432,
252, -752, -152, 288, 268, -580, -848, -592, 108, -76, 244,
312, -716, 592, -80, 436, 360, 4, -248, 160, 516, 584,
732, 44, -468, -280, -292, -156, -588, 28, 308, 912, 24,
124, 156, 180, -252, 944, -924, -772, -520, -428, -624, 300,
-212, -1144, 32, -724, 800, -1128, -212, -1288, -848, 180, -416,
440, 192, -576, -792, -76, -1080, 80, -532, -352, -132, 380,
-820, 148, 1112, 128, 164, 456, 700, -924, 144, -668, -384,
648, -832, 508, 552, -52, -100, -656, 208, -568, 748, -88,
680, 232, 300, 192, -408, -1012, -152, -252, -268, 272, -876,
-664, -648, -332, -136, 16, 12, 1152, -28, 332, -536, 320,
-672, -460, -316, 532, -260, 228, -40, 1052, -816, 180, 88,
-496, -556, -672, -368, 428, 92, 356, 404, -408, 252, 196,
-176, -556, 792, 268, 32, 372, 40, 96, -332, 328, 120,
372, -900, -40, 472, -264, -592, 952, 128, 656, 112, 664,
-232, 420, 4, -344, -464, 556, 244, -416, -32, 252, 0,
-412, 188, -696, 508, -476, 324, -1096, 656, -312, 560, 264,
-136, 304, 160, -64, -580, 248, 336, -720, 560, -348, -288,
-276, -196, -500, 852, -544, -236, -1128, -992, -776, 116, 56,
52, 860, 884, 212, -12, 168, 1020, 512, -552, 924, -148,
716, 188, 164, -340, -520, -184, 880, -152, -680, -208, -1156,
-300, -528, -472, 364, 100, -744, -1056, -32, 540, 280, 144,
-676, -32, -232, -280, -224, 96, 568, -76, 172, 148, 148,
104, 32, -296, -32, 788, -80, 32, -16, 280, 288, 944,
428, -484
};
static const int gauss_bits = 11;
static int luma_subblock_size_y = 32;
static int luma_subblock_size_x = 32;
static int chroma_subblock_size_y = 16;
static int chroma_subblock_size_x = 16;
static const int min_luma_legal_range = 16;
static const int max_luma_legal_range = 235;
static const int min_chroma_legal_range = 16;
static const int max_chroma_legal_range = 240;
static int scaling_lut_y[256];
static int scaling_lut_cb[256];
static int scaling_lut_cr[256];
static int grain_min;
static int grain_max;
static uint16_t random_register = 0;
// random number generator register
static void dealloc_arrays(
const aom_film_grain_t *params,
int ***pred_pos_luma,
int ***pred_pos_chroma,
int **luma_grain_block,
int **cb_grain_block,
int **cr_grain_block,
int **y_line_buf,
int **cb_line_buf,
int **cr_line_buf,
int **y_col_buf,
int **cb_col_buf,
int **cr_col_buf) {
int num_pos_luma = 2 * params->ar_coeff_lag * (params->ar_coeff_lag + 1);
int num_pos_chroma = num_pos_luma;
if (params->num_y_points > 0) ++num_pos_chroma;
if (*pred_pos_luma) {
for (
int row = 0; row < num_pos_luma; row++) {
aom_free((*pred_pos_luma)[row]);
}
aom_free(*pred_pos_luma);
*pred_pos_luma = NULL;
}
if (*pred_pos_chroma) {
for (
int row = 0; row < num_pos_chroma; row++) {
aom_free((*pred_pos_chroma)[row]);
}
aom_free(*pred_pos_chroma);
*pred_pos_chroma = NULL;
}
aom_free(*y_line_buf);
*y_line_buf = NULL;
aom_free(*cb_line_buf);
*cb_line_buf = NULL;
aom_free(*cr_line_buf);
*cr_line_buf = NULL;
aom_free(*y_col_buf);
*y_col_buf = NULL;
aom_free(*cb_col_buf);
*cb_col_buf = NULL;
aom_free(*cr_col_buf);
*cr_col_buf = NULL;
aom_free(*luma_grain_block);
*luma_grain_block = NULL;
aom_free(*cb_grain_block);
*cb_grain_block = NULL;
aom_free(*cr_grain_block);
*cr_grain_block = NULL;
}
static bool init_arrays(
const aom_film_grain_t *params,
int luma_stride,
int chroma_stride,
int ***pred_pos_luma_p,
int ***pred_pos_chroma_p,
int **luma_grain_block,
int **cb_grain_block,
int **cr_grain_block,
int **y_line_buf,
int **cb_line_buf,
int **cr_line_buf,
int **y_col_buf,
int **cb_col_buf,
int **cr_col_buf,
int luma_grain_samples,
int chroma_grain_samples,
int chroma_subsamp_y,
int chroma_subsamp_x) {
*pred_pos_luma_p = NULL;
*pred_pos_chroma_p = NULL;
*luma_grain_block = NULL;
*cb_grain_block = NULL;
*cr_grain_block = NULL;
*y_line_buf = NULL;
*cb_line_buf = NULL;
*cr_line_buf = NULL;
*y_col_buf = NULL;
*cb_col_buf = NULL;
*cr_col_buf = NULL;
memset(scaling_lut_y, 0,
sizeof(*scaling_lut_y) * 256);
memset(scaling_lut_cb, 0,
sizeof(*scaling_lut_cb) * 256);
memset(scaling_lut_cr, 0,
sizeof(*scaling_lut_cr) * 256);
int num_pos_luma = 2 * params->ar_coeff_lag * (params->ar_coeff_lag + 1);
int num_pos_chroma = num_pos_luma;
if (params->num_y_points > 0) ++num_pos_chroma;
int **pred_pos_luma;
int **pred_pos_chroma;
pred_pos_luma = (
int **)aom_calloc(num_pos_luma,
sizeof(*pred_pos_luma));
if (!pred_pos_luma)
return false;
for (
int row = 0; row < num_pos_luma; row++) {
pred_pos_luma[row] = (
int *)aom_malloc(
sizeof(**pred_pos_luma) * 3);
if (!pred_pos_luma[row]) {
dealloc_arrays(params, pred_pos_luma_p, pred_pos_chroma_p,
luma_grain_block, cb_grain_block, cr_grain_block,
y_line_buf, cb_line_buf, cr_line_buf, y_col_buf,
cb_col_buf, cr_col_buf);
return false;
}
}
pred_pos_chroma =
(
int **)aom_calloc(num_pos_chroma,
sizeof(*pred_pos_chroma));
if (!pred_pos_chroma) {
dealloc_arrays(params, pred_pos_luma_p, pred_pos_chroma_p, luma_grain_block,
cb_grain_block, cr_grain_block, y_line_buf, cb_line_buf,
cr_line_buf, y_col_buf, cb_col_buf, cr_col_buf);
return false;
}
for (
int row = 0; row < num_pos_chroma; row++) {
pred_pos_chroma[row] = (
int *)aom_malloc(
sizeof(**pred_pos_chroma) * 3);
if (!pred_pos_chroma[row]) {
dealloc_arrays(params, pred_pos_luma_p, pred_pos_chroma_p,
luma_grain_block, cb_grain_block, cr_grain_block,
y_line_buf, cb_line_buf, cr_line_buf, y_col_buf,
cb_col_buf, cr_col_buf);
return false;
}
}
int pos_ar_index = 0;
for (
int row = -params->ar_coeff_lag; row < 0; row++) {
for (
int col = -params->ar_coeff_lag; col < params->ar_coeff_lag + 1;
col++) {
pred_pos_luma[pos_ar_index][0] = row;
pred_pos_luma[pos_ar_index][1] = col;
pred_pos_luma[pos_ar_index][2] = 0;
pred_pos_chroma[pos_ar_index][0] = row;
pred_pos_chroma[pos_ar_index][1] = col;
pred_pos_chroma[pos_ar_index][2] = 0;
++pos_ar_index;
}
}
for (
int col = -params->ar_coeff_lag; col < 0; col++) {
pred_pos_luma[pos_ar_index][0] = 0;
pred_pos_luma[pos_ar_index][1] = col;
pred_pos_luma[pos_ar_index][2] = 0;
pred_pos_chroma[pos_ar_index][0] = 0;
pred_pos_chroma[pos_ar_index][1] = col;
pred_pos_chroma[pos_ar_index][2] = 0;
++pos_ar_index;
}
if (params->num_y_points > 0) {
pred_pos_chroma[pos_ar_index][0] = 0;
pred_pos_chroma[pos_ar_index][1] = 0;
pred_pos_chroma[pos_ar_index][2] = 1;
}
*pred_pos_luma_p = pred_pos_luma;
*pred_pos_chroma_p = pred_pos_chroma;
*y_line_buf = (
int *)aom_malloc(
sizeof(**y_line_buf) * luma_stride * 2);
*cb_line_buf = (
int *)aom_malloc(
sizeof(**cb_line_buf) * chroma_stride *
(2 >> chroma_subsamp_y));
*cr_line_buf = (
int *)aom_malloc(
sizeof(**cr_line_buf) * chroma_stride *
(2 >> chroma_subsamp_y));
*y_col_buf =
(
int *)aom_malloc(
sizeof(**y_col_buf) * (luma_subblock_size_y + 2) * 2);
*cb_col_buf =
(
int *)aom_malloc(
sizeof(**cb_col_buf) *
(chroma_subblock_size_y + (2 >> chroma_subsamp_y)) *
(2 >> chroma_subsamp_x));
*cr_col_buf =
(
int *)aom_malloc(
sizeof(**cr_col_buf) *
(chroma_subblock_size_y + (2 >> chroma_subsamp_y)) *
(2 >> chroma_subsamp_x));
*luma_grain_block =
(
int *)aom_malloc(
sizeof(**luma_grain_block) * luma_grain_samples);
*cb_grain_block =
(
int *)aom_malloc(
sizeof(**cb_grain_block) * chroma_grain_samples);
*cr_grain_block =
(
int *)aom_malloc(
sizeof(**cr_grain_block) * chroma_grain_samples);
if (!(*pred_pos_luma_p && *pred_pos_chroma_p && *y_line_buf && *cb_line_buf &&
*cr_line_buf && *y_col_buf && *cb_col_buf && *cr_col_buf &&
*luma_grain_block && *cb_grain_block && *cr_grain_block)) {
dealloc_arrays(params, pred_pos_luma_p, pred_pos_chroma_p, luma_grain_block,
cb_grain_block, cr_grain_block, y_line_buf, cb_line_buf,
cr_line_buf, y_col_buf, cb_col_buf, cr_col_buf);
return false;
}
return true;
}
// get a number between 0 and 2^bits - 1
static inline int get_random_number(
int bits) {
uint16_t bit;
bit = ((random_register >> 0) ^ (random_register >> 1) ^
(random_register >> 3) ^ (random_register >> 12)) &
1;
random_register = (random_register >> 1) | (bit << 15);
return (random_register >> (16 - bits)) & ((1 << bits) - 1);
}
static void init_random_generator(
int luma_line, uint16_t seed) {
// same for the picture
uint16_t msb = (seed >> 8) & 255;
uint16_t lsb = seed & 255;
random_register = (msb << 8) + lsb;
// changes for each row
int luma_num = luma_line >> 5;
random_register ^= ((luma_num * 37 + 178) & 255) << 8;
random_register ^= ((luma_num * 173 + 105) & 255);
}
static void generate_luma_grain_block(
const aom_film_grain_t *params,
int **pred_pos_luma,
int *luma_grain_block,
int luma_block_size_y,
int luma_block_size_x,
int luma_grain_stride,
int left_pad,
int top_pad,
int right_pad,
int bottom_pad) {
if (params->num_y_points == 0) {
memset(luma_grain_block, 0,
sizeof(*luma_grain_block) * luma_block_size_y * luma_grain_stride);
return;
}
int bit_depth = params->bit_depth;
int gauss_sec_shift = 12 - bit_depth + params->grain_scale_shift;
int num_pos_luma = 2 * params->ar_coeff_lag * (params->ar_coeff_lag + 1);
int rounding_offset = (1 << (params->ar_coeff_shift - 1));
for (
int i = 0; i < luma_block_size_y; i++)
for (
int j = 0; j < luma_block_size_x; j++)
luma_grain_block[i * luma_grain_stride + j] =
(gaussian_sequence[get_random_number(gauss_bits)] +
((1 << gauss_sec_shift) >> 1)) >>
gauss_sec_shift;
for (
int i = top_pad; i < luma_block_size_y - bottom_pad; i++)
for (
int j = left_pad; j < luma_block_size_x - right_pad; j++) {
int wsum = 0;
for (
int pos = 0; pos < num_pos_luma; pos++) {
wsum = wsum + params->ar_coeffs_y[pos] *
luma_grain_block[(i + pred_pos_luma[pos][0]) *
luma_grain_stride +
j + pred_pos_luma[pos][1]];
}
luma_grain_block[i * luma_grain_stride + j] =
clamp(luma_grain_block[i * luma_grain_stride + j] +
((wsum + rounding_offset) >> params->ar_coeff_shift),
grain_min, grain_max);
}
}
static bool generate_chroma_grain_blocks(
const aom_film_grain_t *params,
int **pred_pos_chroma,
int *luma_grain_block,
int *cb_grain_block,
int *cr_grain_block,
int luma_grain_stride,
int chroma_block_size_y,
int chroma_block_size_x,
int chroma_grain_stride,
int left_pad,
int top_pad,
int right_pad,
int bottom_pad,
int chroma_subsamp_y,
int chroma_subsamp_x) {
int bit_depth = params->bit_depth;
int gauss_sec_shift = 12 - bit_depth + params->grain_scale_shift;
int num_pos_chroma = 2 * params->ar_coeff_lag * (params->ar_coeff_lag + 1);
if (params->num_y_points > 0) ++num_pos_chroma;
int rounding_offset = (1 << (params->ar_coeff_shift - 1));
int chroma_grain_block_size = chroma_block_size_y * chroma_grain_stride;
if (params->num_cb_points || params->chroma_scaling_from_luma) {
init_random_generator(7 << 5, params->random_seed);
for (
int i = 0; i < chroma_block_size_y; i++)
for (
int j = 0; j < chroma_block_size_x; j++)
cb_grain_block[i * chroma_grain_stride + j] =
(gaussian_sequence[get_random_number(gauss_bits)] +
((1 << gauss_sec_shift) >> 1)) >>
gauss_sec_shift;
}
else {
memset(cb_grain_block, 0,
sizeof(*cb_grain_block) * chroma_grain_block_size);
}
if (params->num_cr_points || params->chroma_scaling_from_luma) {
init_random_generator(11 << 5, params->random_seed);
for (
int i = 0; i < chroma_block_size_y; i++)
for (
int j = 0; j < chroma_block_size_x; j++)
cr_grain_block[i * chroma_grain_stride + j] =
(gaussian_sequence[get_random_number(gauss_bits)] +
((1 << gauss_sec_shift) >> 1)) >>
gauss_sec_shift;
}
else {
memset(cr_grain_block, 0,
sizeof(*cr_grain_block) * chroma_grain_block_size);
}
for (
int i = top_pad; i < chroma_block_size_y - bottom_pad; i++)
for (
int j = left_pad; j < chroma_block_size_x - right_pad; j++) {
int wsum_cb = 0;
int wsum_cr = 0;
for (
int pos = 0; pos < num_pos_chroma; pos++) {
if (pred_pos_chroma[pos][2] == 0) {
wsum_cb = wsum_cb + params->ar_coeffs_cb[pos] *
cb_grain_block[(i + pred_pos_chroma[pos][0]) *
chroma_grain_stride +
j + pred_pos_chroma[pos][1]];
wsum_cr = wsum_cr + params->ar_coeffs_cr[pos] *
cr_grain_block[(i + pred_pos_chroma[pos][0]) *
chroma_grain_stride +
j + pred_pos_chroma[pos][1]];
}
else if (pred_pos_chroma[pos][2] == 1) {
int av_luma = 0;
int luma_coord_y = ((i - top_pad) << chroma_subsamp_y) + top_pad;
int luma_coord_x = ((j - left_pad) << chroma_subsamp_x) + left_pad;
for (
int k = luma_coord_y; k < luma_coord_y + chroma_subsamp_y + 1;
k++)
for (
int l = luma_coord_x; l < luma_coord_x + chroma_subsamp_x + 1;
l++)
av_luma += luma_grain_block[k * luma_grain_stride + l];
av_luma =
(av_luma + ((1 << (chroma_subsamp_y + chroma_subsamp_x)) >> 1)) >>
(chroma_subsamp_y + chroma_subsamp_x);
wsum_cb = wsum_cb + params->ar_coeffs_cb[pos] * av_luma;
wsum_cr = wsum_cr + params->ar_coeffs_cr[pos] * av_luma;
}
else {
fprintf(
stderr,
"Grain synthesis: prediction between two chroma components is "
"not supported!");
return false;
}
}
if (params->num_cb_points || params->chroma_scaling_from_luma)
cb_grain_block[i * chroma_grain_stride + j] =
clamp(cb_grain_block[i * chroma_grain_stride + j] +
((wsum_cb + rounding_offset) >> params->ar_coeff_shift),
grain_min, grain_max);
if (params->num_cr_points || params->chroma_scaling_from_luma)
cr_grain_block[i * chroma_grain_stride + j] =
clamp(cr_grain_block[i * chroma_grain_stride + j] +
((wsum_cr + rounding_offset) >> params->ar_coeff_shift),
grain_min, grain_max);
}
return true;
}
static void init_scaling_function(
const int scaling_points[][2],
int num_points,
int scaling_lut[]) {
if (num_points == 0)
return;
for (
int i = 0; i < scaling_points[0][0]; i++)
scaling_lut[i] = scaling_points[0][1];
for (
int point = 0; point < num_points - 1; point++) {
int delta_y = scaling_points[point + 1][1] - scaling_points[point][1];
int delta_x = scaling_points[point + 1][0] - scaling_points[point][0];
int64_t delta = delta_y * ((65536 + (delta_x >> 1)) / delta_x);
for (
int x = 0; x < delta_x; x++) {
scaling_lut[scaling_points[point][0] + x] =
scaling_points[point][1] + (
int)((x * delta + 32768) >> 16);
}
}
for (
int i = scaling_points[num_points - 1][0]; i < 256; i++)
scaling_lut[i] = scaling_points[num_points - 1][1];
}
// function that extracts samples from a LUT (and interpolates intemediate
// frames for 10- and 12-bit video)
static int scale_LUT(
int *scaling_lut,
int index,
int bit_depth) {
int x = index >> (bit_depth - 8);
if (!(bit_depth - 8) || x == 255)
return scaling_lut[x];
else
return scaling_lut[x] + (((scaling_lut[x + 1] - scaling_lut[x]) *
(index & ((1 << (bit_depth - 8)) - 1)) +
(1 << (bit_depth - 9))) >>
(bit_depth - 8));
}
static void add_noise_to_block(
const aom_film_grain_t *params, uint8_t *luma,
uint8_t *cb, uint8_t *cr,
int luma_stride,
int chroma_stride,
int *luma_grain,
int *cb_grain,
int *cr_grain,
int luma_grain_stride,
int chroma_grain_stride,
int half_luma_height,
int half_luma_width,
int bit_depth,
int chroma_subsamp_y,
int chroma_subsamp_x,
int mc_identity) {
int cb_mult = params->cb_mult - 128;
// fixed scale
int cb_luma_mult = params->cb_luma_mult - 128;
// fixed scale
int cb_offset = params->cb_offset - 256;
int cr_mult = params->cr_mult - 128;
// fixed scale
int cr_luma_mult = params->cr_luma_mult - 128;
// fixed scale
int cr_offset = params->cr_offset - 256;
int rounding_offset = (1 << (params->scaling_shift - 1));
int apply_y = params->num_y_points > 0 ? 1 : 0;
int apply_cb =
(params->num_cb_points > 0 || params->chroma_scaling_from_luma) ? 1 : 0;
int apply_cr =
(params->num_cr_points > 0 || params->chroma_scaling_from_luma) ? 1 : 0;
if (params->chroma_scaling_from_luma) {
cb_mult = 0;
// fixed scale
cb_luma_mult = 64;
// fixed scale
cb_offset = 0;
cr_mult = 0;
// fixed scale
cr_luma_mult = 64;
// fixed scale
cr_offset = 0;
}
int min_luma, max_luma, min_chroma, max_chroma;
if (params->clip_to_restricted_range) {
min_luma = min_luma_legal_range;
max_luma = max_luma_legal_range;
if (mc_identity) {
min_chroma = min_luma_legal_range;
max_chroma = max_luma_legal_range;
}
else {
min_chroma = min_chroma_legal_range;
max_chroma = max_chroma_legal_range;
}
}
else {
min_luma = min_chroma = 0;
max_luma = max_chroma = 255;
}
for (
int i = 0; i < (half_luma_height << (1 - chroma_subsamp_y)); i++) {
for (
int j = 0; j < (half_luma_width << (1 - chroma_subsamp_x)); j++) {
int average_luma = 0;
if (chroma_subsamp_x) {
average_luma = (luma[(i << chroma_subsamp_y) * luma_stride +
(j << chroma_subsamp_x)] +
luma[(i << chroma_subsamp_y) * luma_stride +
(j << chroma_subsamp_x) + 1] +
1) >>
1;
}
else {
average_luma = luma[(i << chroma_subsamp_y) * luma_stride + j];
}
if (apply_cb) {
cb[i * chroma_stride + j] = clamp(
cb[i * chroma_stride + j] +
((scale_LUT(scaling_lut_cb,
clamp(((average_luma * cb_luma_mult +
cb_mult * cb[i * chroma_stride + j]) >>
6) +
cb_offset,
0, (256 << (bit_depth - 8)) - 1),
8) *
cb_grain[i * chroma_grain_stride + j] +
rounding_offset) >>
params->scaling_shift),
min_chroma, max_chroma);
}
if (apply_cr) {
cr[i * chroma_stride + j] = clamp(
cr[i * chroma_stride + j] +
((scale_LUT(scaling_lut_cr,
clamp(((average_luma * cr_luma_mult +
cr_mult * cr[i * chroma_stride + j]) >>
6) +
cr_offset,
0, (256 << (bit_depth - 8)) - 1),
8) *
cr_grain[i * chroma_grain_stride + j] +
rounding_offset) >>
params->scaling_shift),
min_chroma, max_chroma);
}
}
}
if (apply_y) {
for (
int i = 0; i < (half_luma_height << 1); i++) {
for (
int j = 0; j < (half_luma_width << 1); j++) {
luma[i * luma_stride + j] =
clamp(luma[i * luma_stride + j] +
((scale_LUT(scaling_lut_y, luma[i * luma_stride + j], 8) *
luma_grain[i * luma_grain_stride + j] +
rounding_offset) >>
params->scaling_shift),
min_luma, max_luma);
}
}
}
}
static void add_noise_to_block_hbd(
const aom_film_grain_t *params, uint16_t *luma, uint16_t *cb, uint16_t *cr,
int luma_stride,
int chroma_stride,
int *luma_grain,
int *cb_grain,
int *cr_grain,
int luma_grain_stride,
int chroma_grain_stride,
int half_luma_height,
int half_luma_width,
int bit_depth,
int chroma_subsamp_y,
int chroma_subsamp_x,
int mc_identity) {
int cb_mult = params->cb_mult - 128;
// fixed scale
int cb_luma_mult = params->cb_luma_mult - 128;
// fixed scale
// offset value depends on the bit depth
int cb_offset = (params->cb_offset << (bit_depth - 8)) - (1 << bit_depth);
int cr_mult = params->cr_mult - 128;
// fixed scale
int cr_luma_mult = params->cr_luma_mult - 128;
// fixed scale
// offset value depends on the bit depth
int cr_offset = (params->cr_offset << (bit_depth - 8)) - (1 << bit_depth);
int rounding_offset = (1 << (params->scaling_shift - 1));
int apply_y = params->num_y_points > 0 ? 1 : 0;
int apply_cb =
(params->num_cb_points > 0 || params->chroma_scaling_from_luma) > 0 ? 1
: 0;
int apply_cr =
(params->num_cr_points > 0 || params->chroma_scaling_from_luma) > 0 ? 1
: 0;
if (params->chroma_scaling_from_luma) {
cb_mult = 0;
// fixed scale
cb_luma_mult = 64;
// fixed scale
cb_offset = 0;
cr_mult = 0;
// fixed scale
cr_luma_mult = 64;
// fixed scale
cr_offset = 0;
}
int min_luma, max_luma, min_chroma, max_chroma;
if (params->clip_to_restricted_range) {
min_luma = min_luma_legal_range << (bit_depth - 8);
max_luma = max_luma_legal_range << (bit_depth - 8);
if (mc_identity) {
min_chroma = min_luma_legal_range << (bit_depth - 8);
max_chroma = max_luma_legal_range << (bit_depth - 8);
}
else {
min_chroma = min_chroma_legal_range << (bit_depth - 8);
max_chroma = max_chroma_legal_range << (bit_depth - 8);
}
}
else {
min_luma = min_chroma = 0;
max_luma = max_chroma = (256 << (bit_depth - 8)) - 1;
}
for (
int i = 0; i < (half_luma_height << (1 - chroma_subsamp_y)); i++) {
for (
int j = 0; j < (half_luma_width << (1 - chroma_subsamp_x)); j++) {
int average_luma = 0;
if (chroma_subsamp_x) {
average_luma = (luma[(i << chroma_subsamp_y) * luma_stride +
(j << chroma_subsamp_x)] +
luma[(i << chroma_subsamp_y) * luma_stride +
(j << chroma_subsamp_x) + 1] +
1) >>
1;
}
else {
average_luma = luma[(i << chroma_subsamp_y) * luma_stride + j];
}
if (apply_cb) {
cb[i * chroma_stride + j] = clamp(
cb[i * chroma_stride + j] +
((scale_LUT(scaling_lut_cb,
clamp(((average_luma * cb_luma_mult +
cb_mult * cb[i * chroma_stride + j]) >>
6) +
cb_offset,
0, (256 << (bit_depth - 8)) - 1),
bit_depth) *
cb_grain[i * chroma_grain_stride + j] +
rounding_offset) >>
params->scaling_shift),
min_chroma, max_chroma);
}
if (apply_cr) {
cr[i * chroma_stride + j] = clamp(
cr[i * chroma_stride + j] +
((scale_LUT(scaling_lut_cr,
clamp(((average_luma * cr_luma_mult +
cr_mult * cr[i * chroma_stride + j]) >>
6) +
cr_offset,
0, (256 << (bit_depth - 8)) - 1),
bit_depth) *
cr_grain[i * chroma_grain_stride + j] +
rounding_offset) >>
params->scaling_shift),
min_chroma, max_chroma);
}
}
}
if (apply_y) {
for (
int i = 0; i < (half_luma_height << 1); i++) {
for (
int j = 0; j < (half_luma_width << 1); j++) {
luma[i * luma_stride + j] =
clamp(luma[i * luma_stride + j] +
((scale_LUT(scaling_lut_y, luma[i * luma_stride + j],
bit_depth) *
luma_grain[i * luma_grain_stride + j] +
rounding_offset) >>
params->scaling_shift),
min_luma, max_luma);
}
}
}
}
static void copy_rect(uint8_t *src,
int src_stride, uint8_t *dst,
int dst_stride,
int width,
int height,
int use_high_bit_depth) {
int hbd_coeff = use_high_bit_depth ? 2 : 1;
while (height) {
memcpy(dst, src, width *
sizeof(uint8_t) * hbd_coeff);
src += src_stride;
dst += dst_stride;
--height;
}
return;
}
static void copy_area(
int *src,
int src_stride,
int *dst,
int dst_stride,
int width,
int height) {
while (height) {
memcpy(dst, src, width *
sizeof(*src));
src += src_stride;
dst += dst_stride;
--height;
}
return;
}
static void extend_even(uint8_t *dst,
int dst_stride,
int width,
int height,
int use_high_bit_depth) {
if ((width & 1) == 0 && (height & 1) == 0)
return;
if (use_high_bit_depth) {
uint16_t *dst16 = (uint16_t *)dst;
int dst16_stride = dst_stride / 2;
if (width & 1) {
for (
int i = 0; i < height; ++i)
dst16[i * dst16_stride + width] = dst16[i * dst16_stride + width - 1];
}
width = (width + 1) & (~1);
if (height & 1) {
memcpy(&dst16[height * dst16_stride], &dst16[(height - 1) * dst16_stride],
sizeof(*dst16) * width);
}
}
else {
if (width & 1) {
for (
int i = 0; i < height; ++i)
dst[i * dst_stride + width] = dst[i * dst_stride + width - 1];
}
width = (width + 1) & (~1);
if (height & 1) {
memcpy(&dst[height * dst_stride], &dst[(height - 1) * dst_stride],
sizeof(*dst) * width);
}
}
}
static void ver_boundary_overlap(
int *left_block,
int left_stride,
int *right_block,
int right_stride,
int *dst_block,
int dst_stride,
int width,
int height) {
if (width == 1) {
while (height) {
*dst_block = clamp((*left_block * 23 + *right_block * 22 + 16) >> 5,
grain_min, grain_max);
left_block += left_stride;
right_block += right_stride;
dst_block += dst_stride;
--height;
}
return;
}
else if (width == 2) {
while (height) {
dst_block[0] = clamp((27 * left_block[0] + 17 * right_block[0] + 16) >> 5,
grain_min, grain_max);
dst_block[1] = clamp((17 * left_block[1] + 27 * right_block[1] + 16) >> 5,
grain_min, grain_max);
left_block += left_stride;
right_block += right_stride;
dst_block += dst_stride;
--height;
}
return;
}
}
static void hor_boundary_overlap(
int *top_block,
int top_stride,
int *bottom_block,
int bottom_stride,
int *dst_block,
int dst_stride,
int width,
int height) {
if (height == 1) {
while (width) {
*dst_block = clamp((*top_block * 23 + *bottom_block * 22 + 16) >> 5,
grain_min, grain_max);
++top_block;
++bottom_block;
++dst_block;
--width;
}
return;
}
else if (height == 2) {
while (width) {
dst_block[0] = clamp((27 * top_block[0] + 17 * bottom_block[0] + 16) >> 5,
grain_min, grain_max);
dst_block[dst_stride] = clamp((17 * top_block[top_stride] +
27 * bottom_block[bottom_stride] + 16) >>
5,
grain_min, grain_max);
++top_block;
++bottom_block;
++dst_block;
--width;
}
return;
}
}
/*!\brief Add film grain
*
* Add film grain to an image
*
* Returns 0 for success, -1 for failure
*
* \param[in] grain_params Grain parameters
* \param[in] luma luma plane
* \param[in] cb cb plane
* \param[in] cr cr plane
* \param[in] height luma plane height
* \param[in] width luma plane width
* \param[in] luma_stride luma plane stride
* \param[in] chroma_stride chroma plane stride
*/
static int add_film_grain_run(
const aom_film_grain_t *params, uint8_t *luma,
uint8_t *cb, uint8_t *cr,
int height,
int width,
int luma_stride,
int chroma_stride,
int use_high_bit_depth,
int chroma_subsamp_y,
int chroma_subsamp_x,
int mc_identity) {
int **pred_pos_luma;
int **pred_pos_chroma;
int *luma_grain_block;
int *cb_grain_block;
int *cr_grain_block;
int *y_line_buf;
int *cb_line_buf;
int *cr_line_buf;
int *y_col_buf;
int *cb_col_buf;
int *cr_col_buf;
random_register = params->random_seed;
int left_pad = 3;
int right_pad = 3;
// padding to offset for AR coefficients
int top_pad = 3;
int bottom_pad = 0;
int ar_padding = 3;
// maximum lag used for stabilization of AR coefficients
luma_subblock_size_y = 32;
luma_subblock_size_x = 32;
chroma_subblock_size_y = luma_subblock_size_y >> chroma_subsamp_y;
chroma_subblock_size_x = luma_subblock_size_x >> chroma_subsamp_x;
// Initial padding is only needed for generation of
// film grain templates (to stabilize the AR process)
// Only a 64x64 luma and 32x32 chroma part of a template
// is used later for adding grain, padding can be discarded
int luma_block_size_y =
top_pad + 2 * ar_padding + luma_subblock_size_y * 2 + bottom_pad;
int luma_block_size_x = left_pad + 2 * ar_padding + luma_subblock_size_x * 2 +
2 * ar_padding + right_pad;
int chroma_block_size_y = top_pad + (2 >> chroma_subsamp_y) * ar_padding +
chroma_subblock_size_y * 2 + bottom_pad;
int chroma_block_size_x = left_pad + (2 >> chroma_subsamp_x) * ar_padding +
chroma_subblock_size_x * 2 +
(2 >> chroma_subsamp_x) * ar_padding + right_pad;
int luma_grain_stride = luma_block_size_x;
int chroma_grain_stride = chroma_block_size_x;
int overlap = params->overlap_flag;
int bit_depth = params->bit_depth;
const int grain_center = 128 << (bit_depth - 8);
grain_min = 0 - grain_center;
grain_max = grain_center - 1;
if (!init_arrays(params, luma_stride, chroma_stride, &pred_pos_luma,
&pred_pos_chroma, &luma_grain_block, &cb_grain_block,
&cr_grain_block, &y_line_buf, &cb_line_buf, &cr_line_buf,
&y_col_buf, &cb_col_buf, &cr_col_buf,
luma_block_size_y * luma_block_size_x,
chroma_block_size_y * chroma_block_size_x, chroma_subsamp_y,
chroma_subsamp_x))
return -1;
generate_luma_grain_block(params, pred_pos_luma, luma_grain_block,
luma_block_size_y, luma_block_size_x,
luma_grain_stride, left_pad, top_pad, right_pad,
bottom_pad);
if (!generate_chroma_grain_blocks(
params, pred_pos_chroma, luma_grain_block, cb_grain_block,
cr_grain_block, luma_grain_stride, chroma_block_size_y,
chroma_block_size_x, chroma_grain_stride, left_pad, top_pad,
right_pad, bottom_pad, chroma_subsamp_y, chroma_subsamp_x))
return -1;
init_scaling_function(params->scaling_points_y, params->num_y_points,
scaling_lut_y);
if (params->chroma_scaling_from_luma) {
memcpy(scaling_lut_cb, scaling_lut_y,
sizeof(*scaling_lut_y) * 256);
memcpy(scaling_lut_cr, scaling_lut_y,
sizeof(*scaling_lut_y) * 256);
}
else {
init_scaling_function(params->scaling_points_cb, params->num_cb_points,
scaling_lut_cb);
init_scaling_function(params->scaling_points_cr, params->num_cr_points,
scaling_lut_cr);
}
for (
int y = 0; y < height / 2; y += (luma_subblock_size_y >> 1)) {
init_random_generator(y * 2, params->random_seed);
for (
int x = 0; x < width / 2; x += (luma_subblock_size_x >> 1)) {
int offset_y = get_random_number(8);
int offset_x = (offset_y >> 4) & 15;
offset_y &= 15;
int luma_offset_y = left_pad + 2 * ar_padding + (offset_y << 1);
int luma_offset_x = top_pad + 2 * ar_padding + (offset_x << 1);
int chroma_offset_y = top_pad + (2 >> chroma_subsamp_y) * ar_padding +
offset_y * (2 >> chroma_subsamp_y);
int chroma_offset_x = left_pad + (2 >> chroma_subsamp_x) * ar_padding +
offset_x * (2 >> chroma_subsamp_x);
if (overlap && x) {
ver_boundary_overlap(
y_col_buf, 2,
luma_grain_block + luma_offset_y * luma_grain_stride +
luma_offset_x,
luma_grain_stride, y_col_buf, 2, 2,
AOMMIN(luma_subblock_size_y + 2, height - (y << 1)));
ver_boundary_overlap(
cb_col_buf, 2 >> chroma_subsamp_x,
cb_grain_block + chroma_offset_y * chroma_grain_stride +
chroma_offset_x,
chroma_grain_stride, cb_col_buf, 2 >> chroma_subsamp_x,
2 >> chroma_subsamp_x,
AOMMIN(chroma_subblock_size_y + (2 >> chroma_subsamp_y),
(height - (y << 1)) >> chroma_subsamp_y));
ver_boundary_overlap(
cr_col_buf, 2 >> chroma_subsamp_x,
cr_grain_block + chroma_offset_y * chroma_grain_stride +
chroma_offset_x,
chroma_grain_stride, cr_col_buf, 2 >> chroma_subsamp_x,
2 >> chroma_subsamp_x,
AOMMIN(chroma_subblock_size_y + (2 >> chroma_subsamp_y),
(height - (y << 1)) >> chroma_subsamp_y));
int i = y ? 1 : 0;
if (use_high_bit_depth) {
add_noise_to_block_hbd(
params,
(uint16_t *)luma + ((y + i) << 1) * luma_stride + (x << 1),
(uint16_t *)cb +
((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
(x << (1 - chroma_subsamp_x)),
(uint16_t *)cr +
((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
(x << (1 - chroma_subsamp_x)),
luma_stride, chroma_stride, y_col_buf + i * 4,
cb_col_buf + i * (2 - chroma_subsamp_y) * (2 - chroma_subsamp_x),
cr_col_buf + i * (2 - chroma_subsamp_y) * (2 - chroma_subsamp_x),
2, (2 - chroma_subsamp_x),
AOMMIN(luma_subblock_size_y >> 1, height / 2 - y) - i, 1,
bit_depth, chroma_subsamp_y, chroma_subsamp_x, mc_identity);
}
else {
add_noise_to_block(
params, luma + ((y + i) << 1) * luma_stride + (x << 1),
cb + ((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
(x << (1 - chroma_subsamp_x)),
cr + ((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
(x << (1 - chroma_subsamp_x)),
luma_stride, chroma_stride, y_col_buf + i * 4,
cb_col_buf + i * (2 - chroma_subsamp_y) * (2 - chroma_subsamp_x),
cr_col_buf + i * (2 - chroma_subsamp_y) * (2 - chroma_subsamp_x),
2, (2 - chroma_subsamp_x),
AOMMIN(luma_subblock_size_y >> 1, height / 2 - y) - i, 1,
bit_depth, chroma_subsamp_y, chroma_subsamp_x, mc_identity);
}
}
if (overlap && y) {
if (x) {
hor_boundary_overlap(y_line_buf + (x << 1), luma_stride, y_col_buf, 2,
y_line_buf + (x << 1), luma_stride, 2, 2);
hor_boundary_overlap(cb_line_buf + x * (2 >> chroma_subsamp_x),
chroma_stride, cb_col_buf, 2 >> chroma_subsamp_x,
cb_line_buf + x * (2 >> chroma_subsamp_x),
chroma_stride, 2 >> chroma_subsamp_x,
2 >> chroma_subsamp_y);
hor_boundary_overlap(cr_line_buf + x * (2 >> chroma_subsamp_x),
chroma_stride, cr_col_buf, 2 >> chroma_subsamp_x,
cr_line_buf + x * (2 >> chroma_subsamp_x),
chroma_stride, 2 >> chroma_subsamp_x,
2 >> chroma_subsamp_y);
}
hor_boundary_overlap(
y_line_buf + ((x ? x + 1 : 0) << 1), luma_stride,
luma_grain_block + luma_offset_y * luma_grain_stride +
luma_offset_x + (x ? 2 : 0),
luma_grain_stride, y_line_buf + ((x ? x + 1 : 0) << 1), luma_stride,
AOMMIN(luma_subblock_size_x - ((x ? 1 : 0) << 1),
width - ((x ? x + 1 : 0) << 1)),
2);
hor_boundary_overlap(
cb_line_buf + ((x ? x + 1 : 0) << (1 - chroma_subsamp_x)),
chroma_stride,
cb_grain_block + chroma_offset_y * chroma_grain_stride +
chroma_offset_x + ((x ? 1 : 0) << (1 - chroma_subsamp_x)),
chroma_grain_stride,
cb_line_buf + ((x ? x + 1 : 0) << (1 - chroma_subsamp_x)),
chroma_stride,
AOMMIN(chroma_subblock_size_x -
((x ? 1 : 0) << (1 - chroma_subsamp_x)),
(width - ((x ? x + 1 : 0) << 1)) >> chroma_subsamp_x),
2 >> chroma_subsamp_y);
hor_boundary_overlap(
cr_line_buf + ((x ? x + 1 : 0) << (1 - chroma_subsamp_x)),
chroma_stride,
cr_grain_block + chroma_offset_y * chroma_grain_stride +
chroma_offset_x + ((x ? 1 : 0) << (1 - chroma_subsamp_x)),
chroma_grain_stride,
cr_line_buf + ((x ? x + 1 : 0) << (1 - chroma_subsamp_x)),
chroma_stride,
AOMMIN(chroma_subblock_size_x -
((x ? 1 : 0) << (1 - chroma_subsamp_x)),
(width - ((x ? x + 1 : 0) << 1)) >> chroma_subsamp_x),
2 >> chroma_subsamp_y);
if (use_high_bit_depth) {
add_noise_to_block_hbd(
params, (uint16_t *)luma + (y << 1) * luma_stride + (x << 1),
(uint16_t *)cb + (y << (1 - chroma_subsamp_y)) * chroma_stride +
(x << ((1 - chroma_subsamp_x))),
(uint16_t *)cr + (y << (1 - chroma_subsamp_y)) * chroma_stride +
(x << ((1 - chroma_subsamp_x))),
luma_stride, chroma_stride, y_line_buf + (x << 1),
cb_line_buf + (x << (1 - chroma_subsamp_x)),
cr_line_buf + (x << (1 - chroma_subsamp_x)), luma_stride,
chroma_stride, 1,
AOMMIN(luma_subblock_size_x >> 1, width / 2 - x), bit_depth,
chroma_subsamp_y, chroma_subsamp_x, mc_identity);
}
else {
add_noise_to_block(
params, luma + (y << 1) * luma_stride + (x << 1),
cb + (y << (1 - chroma_subsamp_y)) * chroma_stride +
(x << ((1 - chroma_subsamp_x))),
cr + (y << (1 - chroma_subsamp_y)) * chroma_stride +
(x << ((1 - chroma_subsamp_x))),
luma_stride, chroma_stride, y_line_buf + (x << 1),
cb_line_buf + (x << (1 - chroma_subsamp_x)),
cr_line_buf + (x << (1 - chroma_subsamp_x)), luma_stride,
chroma_stride, 1,
AOMMIN(luma_subblock_size_x >> 1, width / 2 - x), bit_depth,
chroma_subsamp_y, chroma_subsamp_x, mc_identity);
}
}
int i = overlap && y ? 1 : 0;
int j = overlap && x ? 1 : 0;
if (use_high_bit_depth) {
add_noise_to_block_hbd(
params,
(uint16_t *)luma + ((y + i) << 1) * luma_stride + ((x + j) << 1),
(uint16_t *)cb +
((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
((x + j) << (1 - chroma_subsamp_x)),
(uint16_t *)cr +
((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
((x + j) << (1 - chroma_subsamp_x)),
luma_stride, chroma_stride,
luma_grain_block + (luma_offset_y + (i << 1)) * luma_grain_stride +
luma_offset_x + (j << 1),
cb_grain_block +
(chroma_offset_y + (i << (1 - chroma_subsamp_y))) *
chroma_grain_stride +
chroma_offset_x + (j << (1 - chroma_subsamp_x)),
cr_grain_block +
(chroma_offset_y + (i << (1 - chroma_subsamp_y))) *
chroma_grain_stride +
chroma_offset_x + (j << (1 - chroma_subsamp_x)),
luma_grain_stride, chroma_grain_stride,
AOMMIN(luma_subblock_size_y >> 1, height / 2 - y) - i,
AOMMIN(luma_subblock_size_x >> 1, width / 2 - x) - j, bit_depth,
chroma_subsamp_y, chroma_subsamp_x, mc_identity);
}
else {
add_noise_to_block(
params, luma + ((y + i) << 1) * luma_stride + ((x + j) << 1),
cb + ((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
((x + j) << (1 - chroma_subsamp_x)),
cr + ((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
((x + j) << (1 - chroma_subsamp_x)),
luma_stride, chroma_stride,
luma_grain_block + (luma_offset_y + (i << 1)) * luma_grain_stride +
luma_offset_x + (j << 1),
cb_grain_block +
(chroma_offset_y + (i << (1 - chroma_subsamp_y))) *
chroma_grain_stride +
chroma_offset_x + (j << (1 - chroma_subsamp_x)),
cr_grain_block +
(chroma_offset_y + (i << (1 - chroma_subsamp_y))) *
chroma_grain_stride +
chroma_offset_x + (j << (1 - chroma_subsamp_x)),
luma_grain_stride, chroma_grain_stride,
AOMMIN(luma_subblock_size_y >> 1, height / 2 - y) - i,
AOMMIN(luma_subblock_size_x >> 1, width / 2 - x) - j, bit_depth,
chroma_subsamp_y, chroma_subsamp_x, mc_identity);
}
if (overlap) {
if (x) {
// Copy overlapped column bufer to line buffer
copy_area(y_col_buf + (luma_subblock_size_y << 1), 2,
y_line_buf + (x << 1), luma_stride, 2, 2);
copy_area(
cb_col_buf + (chroma_subblock_size_y << (1 - chroma_subsamp_x)),
2 >> chroma_subsamp_x,
cb_line_buf + (x << (1 - chroma_subsamp_x)), chroma_stride,
2 >> chroma_subsamp_x, 2 >> chroma_subsamp_y);
copy_area(
cr_col_buf + (chroma_subblock_size_y << (1 - chroma_subsamp_x)),
2 >> chroma_subsamp_x,
cr_line_buf + (x << (1 - chroma_subsamp_x)), chroma_stride,
2 >> chroma_subsamp_x, 2 >> chroma_subsamp_y);
}
// Copy grain to the line buffer for overlap with a bottom block
copy_area(
luma_grain_block +
(luma_offset_y + luma_subblock_size_y) * luma_grain_stride +
luma_offset_x + ((x ? 2 : 0)),
luma_grain_stride, y_line_buf + ((x ? x + 1 : 0) << 1), luma_stride,
AOMMIN(luma_subblock_size_x, width - (x << 1)) - (x ? 2 : 0), 2);
copy_area(cb_grain_block +
(chroma_offset_y + chroma_subblock_size_y) *
chroma_grain_stride +
chroma_offset_x + (x ? 2 >> chroma_subsamp_x : 0),
chroma_grain_stride,
cb_line_buf + ((x ? x + 1 : 0) << (1 - chroma_subsamp_x)),
chroma_stride,
AOMMIN(chroma_subblock_size_x,
((width - (x << 1)) >> chroma_subsamp_x)) -
(x ? 2 >> chroma_subsamp_x : 0),
2 >> chroma_subsamp_y);
copy_area(cr_grain_block +
(chroma_offset_y + chroma_subblock_size_y) *
chroma_grain_stride +
chroma_offset_x + (x ? 2 >> chroma_subsamp_x : 0),
chroma_grain_stride,
cr_line_buf + ((x ? x + 1 : 0) << (1 - chroma_subsamp_x)),
chroma_stride,
AOMMIN(chroma_subblock_size_x,
((width - (x << 1)) >> chroma_subsamp_x)) -
(x ? 2 >> chroma_subsamp_x : 0),
2 >> chroma_subsamp_y);
// Copy grain to the column buffer for overlap with the next block to
// the right
copy_area(luma_grain_block + luma_offset_y * luma_grain_stride +
luma_offset_x + luma_subblock_size_x,
luma_grain_stride, y_col_buf, 2, 2,
AOMMIN(luma_subblock_size_y + 2, height - (y << 1)));
copy_area(cb_grain_block + chroma_offset_y * chroma_grain_stride +
chroma_offset_x + chroma_subblock_size_x,
chroma_grain_stride, cb_col_buf, 2 >> chroma_subsamp_x,
2 >> chroma_subsamp_x,
AOMMIN(chroma_subblock_size_y + (2 >> chroma_subsamp_y),
(height - (y << 1)) >> chroma_subsamp_y));
copy_area(cr_grain_block + chroma_offset_y * chroma_grain_stride +
chroma_offset_x + chroma_subblock_size_x,
chroma_grain_stride, cr_col_buf, 2 >> chroma_subsamp_x,
2 >> chroma_subsamp_x,
AOMMIN(chroma_subblock_size_y + (2 >> chroma_subsamp_y),
(height - (y << 1)) >> chroma_subsamp_y));
}
}
}
dealloc_arrays(params, &pred_pos_luma, &pred_pos_chroma, &luma_grain_block,
&cb_grain_block, &cr_grain_block, &y_line_buf, &cb_line_buf,
&cr_line_buf, &y_col_buf, &cb_col_buf, &cr_col_buf);
return 0;
}
int av1_add_film_grain(
const aom_film_grain_t *params,
const aom_image_t *src,
aom_image_t *dst) {
uint8_t *luma, *cb, *cr;
int height, width, luma_stride, chroma_stride;
int use_high_bit_depth = 0;
int chroma_subsamp_x = 0;
int chroma_subsamp_y = 0;
int mc_identity = src->mc == AOM_CICP_MC_IDENTITY ? 1 : 0;
switch (src->fmt) {
case AOM_IMG_FMT_AOMI420:
case AOM_IMG_FMT_I420:
use_high_bit_depth = 0;
chroma_subsamp_x = 1;
chroma_subsamp_y = 1;
break;
case AOM_IMG_FMT_I42016:
use_high_bit_depth = 1;
chroma_subsamp_x = 1;
chroma_subsamp_y = 1;
break;
// case AOM_IMG_FMT_444A:
case AOM_IMG_FMT_I444:
use_high_bit_depth = 0;
chroma_subsamp_x = 0;
chroma_subsamp_y = 0;
break;
case AOM_IMG_FMT_I44416:
use_high_bit_depth = 1;
chroma_subsamp_x = 0;
chroma_subsamp_y = 0;
break;
case AOM_IMG_FMT_I422:
use_high_bit_depth = 0;
chroma_subsamp_x = 1;
chroma_subsamp_y = 0;
break;
case AOM_IMG_FMT_I42216:
use_high_bit_depth = 1;
chroma_subsamp_x = 1;
chroma_subsamp_y = 0;
break;
default:
// unknown input format
fprintf(stderr,
"Film grain error: input format is not supported!");
return -1;
}
assert(params->bit_depth == src->bit_depth);
dst->fmt = src->fmt;
dst->bit_depth = src->bit_depth;
dst->r_w = src->r_w;
dst->r_h = src->r_h;
dst->d_w = src->d_w;
dst->d_h = src->d_h;
dst->cp = src->cp;
dst->tc = src->tc;
dst->mc = src->mc;
dst->monochrome = src->monochrome;
dst->csp = src->csp;
dst->range = src->range;
dst->x_chroma_shift = src->x_chroma_shift;
dst->y_chroma_shift = src->y_chroma_shift;
dst->temporal_id = src->temporal_id;
dst->spatial_id = src->spatial_id;
width = src->d_w % 2 ? src->d_w + 1 : src->d_w;
height = src->d_h % 2 ? src->d_h + 1 : src->d_h;
copy_rect(src->planes[AOM_PLANE_Y], src->stride[AOM_PLANE_Y],
dst->planes[AOM_PLANE_Y], dst->stride[AOM_PLANE_Y], src->d_w,
src->d_h, use_high_bit_depth);
// Note that dst is already assumed to be aligned to even.
extend_even(dst->planes[AOM_PLANE_Y], dst->stride[AOM_PLANE_Y], src->d_w,
src->d_h, use_high_bit_depth);
if (!src->monochrome) {
copy_rect(src->planes[AOM_PLANE_U], src->stride[AOM_PLANE_U],
dst->planes[AOM_PLANE_U], dst->stride[AOM_PLANE_U],
width >> chroma_subsamp_x, height >> chroma_subsamp_y,
use_high_bit_depth);
copy_rect(src->planes[AOM_PLANE_V], src->stride[AOM_PLANE_V],
dst->planes[AOM_PLANE_V], dst->stride[AOM_PLANE_V],
width >> chroma_subsamp_x, height >> chroma_subsamp_y,
use_high_bit_depth);
}
luma = dst->planes[AOM_PLANE_Y];
cb = dst->planes[AOM_PLANE_U];
cr = dst->planes[AOM_PLANE_V];
// luma and chroma strides in samples
luma_stride = dst->stride[AOM_PLANE_Y] >> use_high_bit_depth;
chroma_stride = dst->stride[AOM_PLANE_U] >> use_high_bit_depth;
return add_film_grain_run(params, luma, cb, cr, height, width, luma_stride,
chroma_stride, use_high_bit_depth, chroma_subsamp_y,
chroma_subsamp_x, mc_identity);
}
