| 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 | #include "xvididct.h" |
| 28 | |
| 29 | av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, |
| 30 | const uint8_t *src_scantable) |
| 31 | { |
| 32 | int i, end; |
| 33 | |
| 34 | st->scantable = src_scantable; |
| 35 | |
| 36 | for (i = 0; i < 64; i++) { |
| 37 | int j = src_scantable[i]; |
| 38 | st->permutated[i] = permutation[j]; |
| 39 | } |
| 40 | |
| 41 | end = -1; |
| 42 | for (i = 0; i < 64; i++) { |
| 43 | int j = st->permutated[i]; |
| 44 | if (j > end) |
| 45 | end = j; |
| 46 | st->raster_end[i] = end; |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, |
| 51 | enum idct_permutation_type perm_type) |
| 52 | { |
| 53 | int i; |
| 54 | |
| 55 | if (ARCH_X86) |
| 56 | if (ff_init_scantable_permutation_x86(idct_permutation, |
| 57 | perm_type)) |
| 58 | return; |
| 59 | |
| 60 | switch (perm_type) { |
| 61 | case FF_IDCT_PERM_NONE: |
| 62 | for (i = 0; i < 64; i++) |
| 63 | idct_permutation[i] = i; |
| 64 | break; |
| 65 | case FF_IDCT_PERM_LIBMPEG2: |
| 66 | for (i = 0; i < 64; i++) |
| 67 | idct_permutation[i] = (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2); |
| 68 | break; |
| 69 | case FF_IDCT_PERM_TRANSPOSE: |
| 70 | for (i = 0; i < 64; i++) |
| 71 | idct_permutation[i] = ((i & 7) << 3) | (i >> 3); |
| 72 | break; |
| 73 | case FF_IDCT_PERM_PARTTRANS: |
| 74 | for (i = 0; i < 64; i++) |
| 75 | idct_permutation[i] = (i & 0x24) | ((i & 3) << 3) | ((i >> 3) & 3); |
| 76 | break; |
| 77 | default: |
| 78 | av_log(NULL, AV_LOG_ERROR, |
| 79 | "Internal error, IDCT permutation not set\n"); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | void (*ff_put_pixels_clamped)(const int16_t *block, uint8_t *pixels, int line_size); |
| 84 | void (*ff_add_pixels_clamped)(const int16_t *block, uint8_t *pixels, int line_size); |
| 85 | |
| 86 | static void put_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels, |
| 87 | int line_size) |
| 88 | { |
| 89 | int i; |
| 90 | |
| 91 | /* read the pixels */ |
| 92 | for (i = 0; i < 8; i++) { |
| 93 | pixels[0] = av_clip_uint8(block[0]); |
| 94 | pixels[1] = av_clip_uint8(block[1]); |
| 95 | pixels[2] = av_clip_uint8(block[2]); |
| 96 | pixels[3] = av_clip_uint8(block[3]); |
| 97 | pixels[4] = av_clip_uint8(block[4]); |
| 98 | pixels[5] = av_clip_uint8(block[5]); |
| 99 | pixels[6] = av_clip_uint8(block[6]); |
| 100 | pixels[7] = av_clip_uint8(block[7]); |
| 101 | |
| 102 | pixels += line_size; |
| 103 | block += 8; |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | static void put_pixels_clamped4_c(const int16_t *block, uint8_t *av_restrict pixels, |
| 108 | int line_size) |
| 109 | { |
| 110 | int i; |
| 111 | |
| 112 | /* read the pixels */ |
| 113 | for(i=0;i<4;i++) { |
| 114 | pixels[0] = av_clip_uint8(block[0]); |
| 115 | pixels[1] = av_clip_uint8(block[1]); |
| 116 | pixels[2] = av_clip_uint8(block[2]); |
| 117 | pixels[3] = av_clip_uint8(block[3]); |
| 118 | |
| 119 | pixels += line_size; |
| 120 | block += 8; |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | static void put_pixels_clamped2_c(const int16_t *block, uint8_t *av_restrict pixels, |
| 125 | int line_size) |
| 126 | { |
| 127 | int i; |
| 128 | |
| 129 | /* read the pixels */ |
| 130 | for(i=0;i<2;i++) { |
| 131 | pixels[0] = av_clip_uint8(block[0]); |
| 132 | pixels[1] = av_clip_uint8(block[1]); |
| 133 | |
| 134 | pixels += line_size; |
| 135 | block += 8; |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | static void put_signed_pixels_clamped_c(const int16_t *block, |
| 140 | uint8_t *av_restrict pixels, |
| 141 | int line_size) |
| 142 | { |
| 143 | int i, j; |
| 144 | |
| 145 | for (i = 0; i < 8; i++) { |
| 146 | for (j = 0; j < 8; j++) { |
| 147 | if (*block < -128) |
| 148 | *pixels = 0; |
| 149 | else if (*block > 127) |
| 150 | *pixels = 255; |
| 151 | else |
| 152 | *pixels = (uint8_t) (*block + 128); |
| 153 | block++; |
| 154 | pixels++; |
| 155 | } |
| 156 | pixels += (line_size - 8); |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | static void add_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels, |
| 161 | int line_size) |
| 162 | { |
| 163 | int i; |
| 164 | |
| 165 | /* read the pixels */ |
| 166 | for (i = 0; i < 8; i++) { |
| 167 | pixels[0] = av_clip_uint8(pixels[0] + block[0]); |
| 168 | pixels[1] = av_clip_uint8(pixels[1] + block[1]); |
| 169 | pixels[2] = av_clip_uint8(pixels[2] + block[2]); |
| 170 | pixels[3] = av_clip_uint8(pixels[3] + block[3]); |
| 171 | pixels[4] = av_clip_uint8(pixels[4] + block[4]); |
| 172 | pixels[5] = av_clip_uint8(pixels[5] + block[5]); |
| 173 | pixels[6] = av_clip_uint8(pixels[6] + block[6]); |
| 174 | pixels[7] = av_clip_uint8(pixels[7] + block[7]); |
| 175 | pixels += line_size; |
| 176 | block += 8; |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | static void add_pixels_clamped4_c(const int16_t *block, uint8_t *av_restrict pixels, |
| 181 | int line_size) |
| 182 | { |
| 183 | int i; |
| 184 | |
| 185 | /* read the pixels */ |
| 186 | for(i=0;i<4;i++) { |
| 187 | pixels[0] = av_clip_uint8(pixels[0] + block[0]); |
| 188 | pixels[1] = av_clip_uint8(pixels[1] + block[1]); |
| 189 | pixels[2] = av_clip_uint8(pixels[2] + block[2]); |
| 190 | pixels[3] = av_clip_uint8(pixels[3] + block[3]); |
| 191 | pixels += line_size; |
| 192 | block += 8; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | static void add_pixels_clamped2_c(const int16_t *block, uint8_t *av_restrict pixels, |
| 197 | int line_size) |
| 198 | { |
| 199 | int i; |
| 200 | |
| 201 | /* read the pixels */ |
| 202 | for(i=0;i<2;i++) { |
| 203 | pixels[0] = av_clip_uint8(pixels[0] + block[0]); |
| 204 | pixels[1] = av_clip_uint8(pixels[1] + block[1]); |
| 205 | pixels += line_size; |
| 206 | block += 8; |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | static void ff_jref_idct4_put(uint8_t *dest, int line_size, int16_t *block) |
| 211 | { |
| 212 | ff_j_rev_dct4 (block); |
| 213 | put_pixels_clamped4_c(block, dest, line_size); |
| 214 | } |
| 215 | static void ff_jref_idct4_add(uint8_t *dest, int line_size, int16_t *block) |
| 216 | { |
| 217 | ff_j_rev_dct4 (block); |
| 218 | add_pixels_clamped4_c(block, dest, line_size); |
| 219 | } |
| 220 | |
| 221 | static void ff_jref_idct2_put(uint8_t *dest, int line_size, int16_t *block) |
| 222 | { |
| 223 | ff_j_rev_dct2 (block); |
| 224 | put_pixels_clamped2_c(block, dest, line_size); |
| 225 | } |
| 226 | static void ff_jref_idct2_add(uint8_t *dest, int line_size, int16_t *block) |
| 227 | { |
| 228 | ff_j_rev_dct2 (block); |
| 229 | add_pixels_clamped2_c(block, dest, line_size); |
| 230 | } |
| 231 | |
| 232 | static void ff_jref_idct1_put(uint8_t *dest, int line_size, int16_t *block) |
| 233 | { |
| 234 | dest[0] = av_clip_uint8((block[0] + 4)>>3); |
| 235 | } |
| 236 | static void ff_jref_idct1_add(uint8_t *dest, int line_size, int16_t *block) |
| 237 | { |
| 238 | dest[0] = av_clip_uint8(dest[0] + ((block[0] + 4)>>3)); |
| 239 | } |
| 240 | |
| 241 | av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx) |
| 242 | { |
| 243 | const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8; |
| 244 | |
| 245 | if (avctx->lowres==1) { |
| 246 | c->idct_put = ff_jref_idct4_put; |
| 247 | c->idct_add = ff_jref_idct4_add; |
| 248 | c->idct = ff_j_rev_dct4; |
| 249 | c->perm_type = FF_IDCT_PERM_NONE; |
| 250 | } else if (avctx->lowres==2) { |
| 251 | c->idct_put = ff_jref_idct2_put; |
| 252 | c->idct_add = ff_jref_idct2_add; |
| 253 | c->idct = ff_j_rev_dct2; |
| 254 | c->perm_type = FF_IDCT_PERM_NONE; |
| 255 | } else if (avctx->lowres==3) { |
| 256 | c->idct_put = ff_jref_idct1_put; |
| 257 | c->idct_add = ff_jref_idct1_add; |
| 258 | c->idct = ff_j_rev_dct1; |
| 259 | c->perm_type = FF_IDCT_PERM_NONE; |
| 260 | } else { |
| 261 | if (avctx->bits_per_raw_sample == 10) { |
| 262 | c->idct_put = ff_simple_idct_put_10; |
| 263 | c->idct_add = ff_simple_idct_add_10; |
| 264 | c->idct = ff_simple_idct_10; |
| 265 | c->perm_type = FF_IDCT_PERM_NONE; |
| 266 | } else if (avctx->bits_per_raw_sample == 12) { |
| 267 | c->idct_put = ff_simple_idct_put_12; |
| 268 | c->idct_add = ff_simple_idct_add_12; |
| 269 | c->idct = ff_simple_idct_12; |
| 270 | c->perm_type = FF_IDCT_PERM_NONE; |
| 271 | } else { |
| 272 | if (avctx->idct_algo == FF_IDCT_INT) { |
| 273 | c->idct_put = ff_jref_idct_put; |
| 274 | c->idct_add = ff_jref_idct_add; |
| 275 | c->idct = ff_j_rev_dct; |
| 276 | c->perm_type = FF_IDCT_PERM_LIBMPEG2; |
| 277 | #if CONFIG_FAANIDCT |
| 278 | } else if (avctx->idct_algo == FF_IDCT_FAAN) { |
| 279 | c->idct_put = ff_faanidct_put; |
| 280 | c->idct_add = ff_faanidct_add; |
| 281 | c->idct = ff_faanidct; |
| 282 | c->perm_type = FF_IDCT_PERM_NONE; |
| 283 | #endif /* CONFIG_FAANIDCT */ |
| 284 | } else { // accurate/default |
| 285 | c->idct_put = ff_simple_idct_put_8; |
| 286 | c->idct_add = ff_simple_idct_add_8; |
| 287 | c->idct = ff_simple_idct_8; |
| 288 | c->perm_type = FF_IDCT_PERM_NONE; |
| 289 | } |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | c->put_pixels_clamped = put_pixels_clamped_c; |
| 294 | c->put_signed_pixels_clamped = put_signed_pixels_clamped_c; |
| 295 | c->add_pixels_clamped = add_pixels_clamped_c; |
| 296 | |
| 297 | if (CONFIG_MPEG4_DECODER && avctx->idct_algo == FF_IDCT_XVID) |
| 298 | ff_xvid_idct_init(c, avctx); |
| 299 | |
| 300 | if (ARCH_ALPHA) |
| 301 | ff_idctdsp_init_alpha(c, avctx, high_bit_depth); |
| 302 | if (ARCH_ARM) |
| 303 | ff_idctdsp_init_arm(c, avctx, high_bit_depth); |
| 304 | if (ARCH_PPC) |
| 305 | ff_idctdsp_init_ppc(c, avctx, high_bit_depth); |
| 306 | if (ARCH_X86) |
| 307 | ff_idctdsp_init_x86(c, avctx, high_bit_depth); |
| 308 | |
| 309 | ff_put_pixels_clamped = c->put_pixels_clamped; |
| 310 | ff_add_pixels_clamped = c->add_pixels_clamped; |
| 311 | |
| 312 | ff_init_scantable_permutation(c->idct_permutation, |
| 313 | c->perm_type); |
| 314 | } |