1/* 2 * This file is part of FFmpeg. 3 * 4 * FFmpeg is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * FFmpeg is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with FFmpeg; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19#include "config.h" 20#include "libavutil/attributes.h" 21#include "libavutil/common.h" 22#include "avcodec.h" 23#include "dct.h" 24#include "faanidct.h" 25#include "idctdsp.h" 26#include "simple_idct.h" 27 28av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, 29 const uint8_t *src_scantable) 30{ 31 int i, end; 32 33 st->scantable = src_scantable; 34 35 for (i = 0; i < 64; i++) { 36 int j = src_scantable[i]; 37 st->permutated[i] = permutation[j]; 38 } 39 40 end = -1; 41 for (i = 0; i < 64; i++) { 42 int j = st->permutated[i]; 43 if (j > end) 44 end = j; 45 st->raster_end[i] = end; 46 } 47} 48 49av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, 50 int idct_permutation_type) 51{ 52 int i; 53 54 if (ARCH_X86) 55 if (ff_init_scantable_permutation_x86(idct_permutation, 56 idct_permutation_type)) 57 return; 58 59 switch (idct_permutation_type) { 60 case FF_NO_IDCT_PERM: 61 for (i = 0; i < 64; i++) 62 idct_permutation[i] = i; 63 break; 64 case FF_LIBMPEG2_IDCT_PERM: 65 for (i = 0; i < 64; i++) 66 idct_permutation[i] = (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2); 67 break; 68 case FF_TRANSPOSE_IDCT_PERM: 69 for (i = 0; i < 64; i++) 70 idct_permutation[i] = ((i & 7) << 3) | (i >> 3); 71 break; 72 case FF_PARTTRANS_IDCT_PERM: 73 for (i = 0; i < 64; i++) 74 idct_permutation[i] = (i & 0x24) | ((i & 3) << 3) | ((i >> 3) & 3); 75 break; 76 default: 77 av_log(NULL, AV_LOG_ERROR, 78 "Internal error, IDCT permutation not set\n"); 79 } 80} 81 82static void put_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels, 83 int line_size) 84{ 85 int i; 86 87 /* read the pixels */ 88 for (i = 0; i < 8; i++) { 89 pixels[0] = av_clip_uint8(block[0]); 90 pixels[1] = av_clip_uint8(block[1]); 91 pixels[2] = av_clip_uint8(block[2]); 92 pixels[3] = av_clip_uint8(block[3]); 93 pixels[4] = av_clip_uint8(block[4]); 94 pixels[5] = av_clip_uint8(block[5]); 95 pixels[6] = av_clip_uint8(block[6]); 96 pixels[7] = av_clip_uint8(block[7]); 97 98 pixels += line_size; 99 block += 8; 100 } 101} 102 103static void put_pixels_clamped4_c(const int16_t *block, uint8_t *av_restrict pixels, 104 int line_size) 105{ 106 int i; 107 108 /* read the pixels */ 109 for(i=0;i<4;i++) { 110 pixels[0] = av_clip_uint8(block[0]); 111 pixels[1] = av_clip_uint8(block[1]); 112 pixels[2] = av_clip_uint8(block[2]); 113 pixels[3] = av_clip_uint8(block[3]); 114 115 pixels += line_size; 116 block += 8; 117 } 118} 119 120static void put_pixels_clamped2_c(const int16_t *block, uint8_t *av_restrict pixels, 121 int line_size) 122{ 123 int i; 124 125 /* read the pixels */ 126 for(i=0;i<2;i++) { 127 pixels[0] = av_clip_uint8(block[0]); 128 pixels[1] = av_clip_uint8(block[1]); 129 130 pixels += line_size; 131 block += 8; 132 } 133} 134 135static void put_signed_pixels_clamped_c(const int16_t *block, 136 uint8_t *av_restrict pixels, 137 int line_size) 138{ 139 int i, j; 140 141 for (i = 0; i < 8; i++) { 142 for (j = 0; j < 8; j++) { 143 if (*block < -128) 144 *pixels = 0; 145 else if (*block > 127) 146 *pixels = 255; 147 else 148 *pixels = (uint8_t) (*block + 128); 149 block++; 150 pixels++; 151 } 152 pixels += (line_size - 8); 153 } 154} 155 156static void add_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels, 157 int line_size) 158{ 159 int i; 160 161 /* read the pixels */ 162 for (i = 0; i < 8; i++) { 163 pixels[0] = av_clip_uint8(pixels[0] + block[0]); 164 pixels[1] = av_clip_uint8(pixels[1] + block[1]); 165 pixels[2] = av_clip_uint8(pixels[2] + block[2]); 166 pixels[3] = av_clip_uint8(pixels[3] + block[3]); 167 pixels[4] = av_clip_uint8(pixels[4] + block[4]); 168 pixels[5] = av_clip_uint8(pixels[5] + block[5]); 169 pixels[6] = av_clip_uint8(pixels[6] + block[6]); 170 pixels[7] = av_clip_uint8(pixels[7] + block[7]); 171 pixels += line_size; 172 block += 8; 173 } 174} 175 176static void add_pixels_clamped4_c(const int16_t *block, uint8_t *av_restrict pixels, 177 int line_size) 178{ 179 int i; 180 181 /* read the pixels */ 182 for(i=0;i<4;i++) { 183 pixels[0] = av_clip_uint8(pixels[0] + block[0]); 184 pixels[1] = av_clip_uint8(pixels[1] + block[1]); 185 pixels[2] = av_clip_uint8(pixels[2] + block[2]); 186 pixels[3] = av_clip_uint8(pixels[3] + block[3]); 187 pixels += line_size; 188 block += 8; 189 } 190} 191 192static void add_pixels_clamped2_c(const int16_t *block, uint8_t *av_restrict pixels, 193 int line_size) 194{ 195 int i; 196 197 /* read the pixels */ 198 for(i=0;i<2;i++) { 199 pixels[0] = av_clip_uint8(pixels[0] + block[0]); 200 pixels[1] = av_clip_uint8(pixels[1] + block[1]); 201 pixels += line_size; 202 block += 8; 203 } 204} 205 206static void jref_idct_put(uint8_t *dest, int line_size, int16_t *block) 207{ 208 ff_j_rev_dct(block); 209 put_pixels_clamped_c(block, dest, line_size); 210} 211 212static void jref_idct_add(uint8_t *dest, int line_size, int16_t *block) 213{ 214 ff_j_rev_dct(block); 215 add_pixels_clamped_c(block, dest, line_size); 216} 217static void ff_jref_idct4_put(uint8_t *dest, int line_size, int16_t *block) 218{ 219 ff_j_rev_dct4 (block); 220 put_pixels_clamped4_c(block, dest, line_size); 221} 222static void ff_jref_idct4_add(uint8_t *dest, int line_size, int16_t *block) 223{ 224 ff_j_rev_dct4 (block); 225 add_pixels_clamped4_c(block, dest, line_size); 226} 227 228static void ff_jref_idct2_put(uint8_t *dest, int line_size, int16_t *block) 229{ 230 ff_j_rev_dct2 (block); 231 put_pixels_clamped2_c(block, dest, line_size); 232} 233static void ff_jref_idct2_add(uint8_t *dest, int line_size, int16_t *block) 234{ 235 ff_j_rev_dct2 (block); 236 add_pixels_clamped2_c(block, dest, line_size); 237} 238 239static void ff_jref_idct1_put(uint8_t *dest, int line_size, int16_t *block) 240{ 241 dest[0] = av_clip_uint8((block[0] + 4)>>3); 242} 243static void ff_jref_idct1_add(uint8_t *dest, int line_size, int16_t *block) 244{ 245 dest[0] = av_clip_uint8(dest[0] + ((block[0] + 4)>>3)); 246} 247 248av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx) 249{ 250 const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8; 251 252 if (avctx->lowres==1) { 253 c->idct_put = ff_jref_idct4_put; 254 c->idct_add = ff_jref_idct4_add; 255 c->idct = ff_j_rev_dct4; 256 c->idct_permutation_type = FF_NO_IDCT_PERM; 257 } else if (avctx->lowres==2) { 258 c->idct_put = ff_jref_idct2_put; 259 c->idct_add = ff_jref_idct2_add; 260 c->idct = ff_j_rev_dct2; 261 c->idct_permutation_type = FF_NO_IDCT_PERM; 262 } else if (avctx->lowres==3) { 263 c->idct_put = ff_jref_idct1_put; 264 c->idct_add = ff_jref_idct1_add; 265 c->idct = ff_j_rev_dct1; 266 c->idct_permutation_type = FF_NO_IDCT_PERM; 267 } else { 268 if (avctx->bits_per_raw_sample == 10) { 269 c->idct_put = ff_simple_idct_put_10; 270 c->idct_add = ff_simple_idct_add_10; 271 c->idct = ff_simple_idct_10; 272 c->idct_permutation_type = FF_NO_IDCT_PERM; 273 } else if (avctx->bits_per_raw_sample == 12) { 274 c->idct_put = ff_simple_idct_put_12; 275 c->idct_add = ff_simple_idct_add_12; 276 c->idct = ff_simple_idct_12; 277 c->idct_permutation_type = FF_NO_IDCT_PERM; 278 } else { 279 if (avctx->idct_algo == FF_IDCT_INT) { 280 c->idct_put = jref_idct_put; 281 c->idct_add = jref_idct_add; 282 c->idct = ff_j_rev_dct; 283 c->idct_permutation_type = FF_LIBMPEG2_IDCT_PERM; 284 } else if (avctx->idct_algo == FF_IDCT_FAAN) { 285 c->idct_put = ff_faanidct_put; 286 c->idct_add = ff_faanidct_add; 287 c->idct = ff_faanidct; 288 c->idct_permutation_type = FF_NO_IDCT_PERM; 289 } else { // accurate/default 290 c->idct_put = ff_simple_idct_put_8; 291 c->idct_add = ff_simple_idct_add_8; 292 c->idct = ff_simple_idct_8; 293 c->idct_permutation_type = FF_NO_IDCT_PERM; 294 } 295 } 296 } 297 298 c->put_pixels_clamped = put_pixels_clamped_c; 299 c->put_signed_pixels_clamped = put_signed_pixels_clamped_c; 300 c->add_pixels_clamped = add_pixels_clamped_c; 301 302 if (ARCH_ALPHA) 303 ff_idctdsp_init_alpha(c, avctx, high_bit_depth); 304 if (ARCH_ARM) 305 ff_idctdsp_init_arm(c, avctx, high_bit_depth); 306 if (ARCH_PPC) 307 ff_idctdsp_init_ppc(c, avctx, high_bit_depth); 308 if (ARCH_X86) 309 ff_idctdsp_init_x86(c, avctx, high_bit_depth); 310 311 ff_init_scantable_permutation(c->idct_permutation, 312 c->idct_permutation_type); 313} 314