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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 | // SPDX-License-Identifier: GPL-2.0-or-later /* * Coda multi-standard codec IP - H.264 helper functions * * Copyright (C) 2012 Vista Silicon S.L. * Javier Martin, <javier.martin@vista-silicon.com> * Xavier Duret */ #include <linux/kernel.h> #include <linux/string.h> #include <linux/videodev2.h> #include "coda.h" static const u8 coda_filler_size[8] = { 0, 7, 14, 13, 12, 11, 10, 9 }; static const u8 *coda_find_nal_header(const u8 *buf, const u8 *end) { u32 val = 0xffffffff; do { val = val << 8 | *buf++; if (buf >= end) return NULL; } while (val != 0x00000001); return buf; } int coda_sps_parse_profile(struct coda_ctx *ctx, struct vb2_buffer *vb) { const u8 *buf = vb2_plane_vaddr(vb, 0); const u8 *end = buf + vb2_get_plane_payload(vb, 0); /* Find SPS header */ do { buf = coda_find_nal_header(buf, end); if (!buf) return -EINVAL; } while ((*buf++ & 0x1f) != 0x7); ctx->params.h264_profile_idc = buf[0]; ctx->params.h264_level_idc = buf[2]; return 0; } int coda_h264_filler_nal(int size, char *p) { if (size < 6) return -EINVAL; p[0] = 0x00; p[1] = 0x00; p[2] = 0x00; p[3] = 0x01; p[4] = 0x0c; memset(p + 5, 0xff, size - 6); /* Add rbsp stop bit and trailing at the end */ p[size - 1] = 0x80; return 0; } int coda_h264_padding(int size, char *p) { int nal_size; int diff; diff = size - (size & ~0x7); if (diff == 0) return 0; nal_size = coda_filler_size[diff]; coda_h264_filler_nal(nal_size, p); return nal_size; } int coda_h264_profile(int profile_idc) { switch (profile_idc) { case 66: return V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE; case 77: return V4L2_MPEG_VIDEO_H264_PROFILE_MAIN; case 88: return V4L2_MPEG_VIDEO_H264_PROFILE_EXTENDED; case 100: return V4L2_MPEG_VIDEO_H264_PROFILE_HIGH; default: return -EINVAL; } } int coda_h264_level(int level_idc) { switch (level_idc) { case 10: return V4L2_MPEG_VIDEO_H264_LEVEL_1_0; case 9: return V4L2_MPEG_VIDEO_H264_LEVEL_1B; case 11: return V4L2_MPEG_VIDEO_H264_LEVEL_1_1; case 12: return V4L2_MPEG_VIDEO_H264_LEVEL_1_2; case 13: return V4L2_MPEG_VIDEO_H264_LEVEL_1_3; case 20: return V4L2_MPEG_VIDEO_H264_LEVEL_2_0; case 21: return V4L2_MPEG_VIDEO_H264_LEVEL_2_1; case 22: return V4L2_MPEG_VIDEO_H264_LEVEL_2_2; case 30: return V4L2_MPEG_VIDEO_H264_LEVEL_3_0; case 31: return V4L2_MPEG_VIDEO_H264_LEVEL_3_1; case 32: return V4L2_MPEG_VIDEO_H264_LEVEL_3_2; case 40: return V4L2_MPEG_VIDEO_H264_LEVEL_4_0; case 41: return V4L2_MPEG_VIDEO_H264_LEVEL_4_1; case 42: return V4L2_MPEG_VIDEO_H264_LEVEL_4_2; case 50: return V4L2_MPEG_VIDEO_H264_LEVEL_5_0; case 51: return V4L2_MPEG_VIDEO_H264_LEVEL_5_1; default: return -EINVAL; } } struct rbsp { char *buf; int size; int pos; }; static inline int rbsp_read_bit(struct rbsp *rbsp) { int shift = 7 - (rbsp->pos % 8); int ofs = rbsp->pos++ / 8; if (ofs >= rbsp->size) return -EINVAL; return (rbsp->buf[ofs] >> shift) & 1; } static inline int rbsp_write_bit(struct rbsp *rbsp, int bit) { int shift = 7 - (rbsp->pos % 8); int ofs = rbsp->pos++ / 8; if (ofs >= rbsp->size) return -EINVAL; rbsp->buf[ofs] &= ~(1 << shift); rbsp->buf[ofs] |= bit << shift; return 0; } static inline int rbsp_read_bits(struct rbsp *rbsp, int num, int *val) { int i, ret; int tmp = 0; if (num > 32) return -EINVAL; for (i = 0; i < num; i++) { ret = rbsp_read_bit(rbsp); if (ret < 0) return ret; tmp |= ret << (num - i - 1); } if (val) *val = tmp; return 0; } static int rbsp_write_bits(struct rbsp *rbsp, int num, int value) { int ret; while (num--) { ret = rbsp_write_bit(rbsp, (value >> num) & 1); if (ret) return ret; } return 0; } static int rbsp_read_uev(struct rbsp *rbsp, unsigned int *val) { int leading_zero_bits = 0; unsigned int tmp = 0; int ret; while ((ret = rbsp_read_bit(rbsp)) == 0) leading_zero_bits++; if (ret < 0) return ret; if (leading_zero_bits > 0) { ret = rbsp_read_bits(rbsp, leading_zero_bits, &tmp); if (ret) return ret; } if (val) *val = (1 << leading_zero_bits) - 1 + tmp; return 0; } static int rbsp_write_uev(struct rbsp *rbsp, unsigned int value) { int i; int ret; int tmp = value + 1; int leading_zero_bits = fls(tmp) - 1; for (i = 0; i < leading_zero_bits; i++) { ret = rbsp_write_bit(rbsp, 0); if (ret) return ret; } return rbsp_write_bits(rbsp, leading_zero_bits + 1, tmp); } static int rbsp_read_sev(struct rbsp *rbsp, int *val) { unsigned int tmp; int ret; ret = rbsp_read_uev(rbsp, &tmp); if (ret) return ret; if (val) { if (tmp & 1) *val = (tmp + 1) / 2; else *val = -(tmp / 2); } return 0; } /** * coda_h264_sps_fixup - fixes frame cropping values in h.264 SPS * @ctx: encoder context * @width: visible width * @height: visible height * @buf: buffer containing h.264 SPS RBSP, starting with NAL header * @size: modified RBSP size return value * @max_size: available size in buf * * Rewrites the frame cropping values in an h.264 SPS RBSP correctly for the * given visible width and height. */ int coda_h264_sps_fixup(struct coda_ctx *ctx, int width, int height, char *buf, int *size, int max_size) { int profile_idc; unsigned int pic_order_cnt_type; int pic_width_in_mbs_minus1, pic_height_in_map_units_minus1; int frame_mbs_only_flag, frame_cropping_flag; int vui_parameters_present_flag; unsigned int crop_right, crop_bottom; struct rbsp sps; int pos; int ret; if (*size < 8 || *size >= max_size) return -EINVAL; sps.buf = buf + 5; /* Skip NAL header */ sps.size = *size - 5; profile_idc = sps.buf[0]; /* Skip constraint_set[0-5]_flag, reserved_zero_2bits */ /* Skip level_idc */ sps.pos = 24; /* seq_parameter_set_id */ ret = rbsp_read_uev(&sps, NULL); if (ret) return ret; if (profile_idc == 100 || profile_idc == 110 || profile_idc == 122 || profile_idc == 244 || profile_idc == 44 || profile_idc == 83 || profile_idc == 86 || profile_idc == 118 || profile_idc == 128 || profile_idc == 138 || profile_idc == 139 || profile_idc == 134 || profile_idc == 135) { dev_err(ctx->fh.vdev->dev_parent, "%s: Handling profile_idc %d not implemented\n", __func__, profile_idc); return -EINVAL; } /* log2_max_frame_num_minus4 */ ret = rbsp_read_uev(&sps, NULL); if (ret) return ret; ret = rbsp_read_uev(&sps, &pic_order_cnt_type); if (ret) return ret; if (pic_order_cnt_type == 0) { /* log2_max_pic_order_cnt_lsb_minus4 */ ret = rbsp_read_uev(&sps, NULL); if (ret) return ret; } else if (pic_order_cnt_type == 1) { unsigned int i, num_ref_frames_in_pic_order_cnt_cycle; /* delta_pic_order_always_zero_flag */ ret = rbsp_read_bit(&sps); if (ret < 0) return ret; /* offset_for_non_ref_pic */ ret = rbsp_read_sev(&sps, NULL); if (ret) return ret; /* offset_for_top_to_bottom_field */ ret = rbsp_read_sev(&sps, NULL); if (ret) return ret; ret = rbsp_read_uev(&sps, &num_ref_frames_in_pic_order_cnt_cycle); if (ret) return ret; for (i = 0; i < num_ref_frames_in_pic_order_cnt_cycle; i++) { /* offset_for_ref_frame */ ret = rbsp_read_sev(&sps, NULL); if (ret) return ret; } } /* max_num_ref_frames */ ret = rbsp_read_uev(&sps, NULL); if (ret) return ret; /* gaps_in_frame_num_value_allowed_flag */ ret = rbsp_read_bit(&sps); if (ret < 0) return ret; ret = rbsp_read_uev(&sps, &pic_width_in_mbs_minus1); if (ret) return ret; ret = rbsp_read_uev(&sps, &pic_height_in_map_units_minus1); if (ret) return ret; frame_mbs_only_flag = ret = rbsp_read_bit(&sps); if (ret < 0) return ret; if (!frame_mbs_only_flag) { /* mb_adaptive_frame_field_flag */ ret = rbsp_read_bit(&sps); if (ret < 0) return ret; } /* direct_8x8_inference_flag */ ret = rbsp_read_bit(&sps); if (ret < 0) return ret; /* Mark position of the frame cropping flag */ pos = sps.pos; frame_cropping_flag = ret = rbsp_read_bit(&sps); if (ret < 0) return ret; if (frame_cropping_flag) { unsigned int crop_left, crop_top; ret = rbsp_read_uev(&sps, &crop_left); if (ret) return ret; ret = rbsp_read_uev(&sps, &crop_right); if (ret) return ret; ret = rbsp_read_uev(&sps, &crop_top); if (ret) return ret; ret = rbsp_read_uev(&sps, &crop_bottom); if (ret) return ret; } vui_parameters_present_flag = ret = rbsp_read_bit(&sps); if (ret < 0) return ret; if (vui_parameters_present_flag) { dev_err(ctx->fh.vdev->dev_parent, "%s: Handling vui_parameters not implemented\n", __func__); return -EINVAL; } crop_right = round_up(width, 16) - width; crop_bottom = round_up(height, 16) - height; crop_right /= 2; if (frame_mbs_only_flag) crop_bottom /= 2; else crop_bottom /= 4; sps.size = max_size - 5; sps.pos = pos; frame_cropping_flag = 1; ret = rbsp_write_bit(&sps, frame_cropping_flag); if (ret) return ret; ret = rbsp_write_uev(&sps, 0); /* crop_left */ if (ret) return ret; ret = rbsp_write_uev(&sps, crop_right); if (ret) return ret; ret = rbsp_write_uev(&sps, 0); /* crop_top */ if (ret) return ret; ret = rbsp_write_uev(&sps, crop_bottom); if (ret) return ret; ret = rbsp_write_bit(&sps, 0); /* vui_parameters_present_flag */ if (ret) return ret; ret = rbsp_write_bit(&sps, 1); if (ret) return ret; *size = 5 + DIV_ROUND_UP(sps.pos, 8); return 0; } |