src/i965_encoder_utils.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sub license, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the
  13  * next paragraph) shall be included in all copies or substantial portions
  14  * of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  19  * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
  20  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  21  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  22  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  */
  25
  26 #include <stdlib.h>
  27 #include <assert.h>
  28
  29 #include <va/va.h>
  30 #include <va/va_enc_h264.h>
  31
  32 #include "i965_encoder_utils.h"
  33
  34 #define BITSTREAM_ALLOCATE_STEPPING     4096
  35
  36 #define NAL_REF_IDC_NONE        0
  37 #define NAL_REF_IDC_LOW         1
  38 #define NAL_REF_IDC_MEDIUM      2
  39 #define NAL_REF_IDC_HIGH        3
  40
  41 #define NAL_NON_IDR             1
  42 #define NAL_IDR                 5
  43 #define NAL_SPS                 7
  44 #define NAL_PPS                 8
  45 #define NAL_SEI                 6
  46
  47 #define SLICE_TYPE_P            0
  48 #define SLICE_TYPE_B            1
  49 #define SLICE_TYPE_I            2
  50
  51 #define IS_I_SLICE(type) (SLICE_TYPE_I == (type) || SLICE_TYPE_I == (type - 5))
  52 #define IS_P_SLICE(type) (SLICE_TYPE_P == (type) || SLICE_TYPE_P == (type - 5))
  53 #define IS_B_SLICE(type) (SLICE_TYPE_B == (type) || SLICE_TYPE_B == (type - 5))
  54
  55 #define ENTROPY_MODE_CAVLC      0
  56 #define ENTROPY_MODE_CABAC      1
  57
  58 #define PROFILE_IDC_BASELINE    66
  59 #define PROFILE_IDC_MAIN        77
  60 #define PROFILE_IDC_HIGH        100
  61
  62 struct __avc_bitstream {
  63     unsigned int *buffer;
  64     int bit_offset;
  65     int max_size_in_dword;
  66 };
  67
  68 typedef struct __avc_bitstream avc_bitstream;
  69
  70 static unsigned int
  71 swap32(unsigned int val)
  72 {
  73     unsigned char *pval = (unsigned char *)&val;
  74
  75     return ((pval[0] << 24)     |
  76             (pval[1] << 16)     |
  77             (pval[2] << 8)      |
  78             (pval[3] << 0));
  79 }
  80
  81 static void
  82 avc_bitstream_start(avc_bitstream *bs)
  83 {
  84     bs->max_size_in_dword = BITSTREAM_ALLOCATE_STEPPING;
  85     bs->buffer = calloc(bs->max_size_in_dword * sizeof(int), 1);
  86     bs->bit_offset = 0;
  87 }
  88
  89 static void
  90 avc_bitstream_end(avc_bitstream *bs)
  91 {
  92     int pos = (bs->bit_offset >> 5);
  93     int bit_offset = (bs->bit_offset & 0x1f);
  94     int bit_left = 32 - bit_offset;
  95
  96     if (bit_offset) {
  97         bs->buffer[pos] = swap32((bs->buffer[pos] << bit_left));
  98     }
  99
 100     // free(bs->buffer);
 101 }
 102
 103 static void
 104 avc_bitstream_put_ui(avc_bitstream *bs, unsigned int val, int size_in_bits)
 105 {
 106     int pos = (bs->bit_offset >> 5);
 107     int bit_offset = (bs->bit_offset & 0x1f);
 108     int bit_left = 32 - bit_offset;
 109
 110     if (!size_in_bits)
 111         return;
 112
 113     if (size_in_bits < 32)
 114         val &= (( 1 << size_in_bits) - 1);
 115
 116     bs->bit_offset += size_in_bits;
 117
 118     if (bit_left > size_in_bits) {
 119         bs->buffer[pos] = (bs->buffer[pos] << size_in_bits | val);
 120     } else {
 121         size_in_bits -= bit_left;
 122         bs->buffer[pos] = (bs->buffer[pos] << bit_left) | (val >> size_in_bits);
 123         bs->buffer[pos] = swap32(bs->buffer[pos]);
 124
 125         if (pos + 1 == bs->max_size_in_dword) {
 126             bs->max_size_in_dword += BITSTREAM_ALLOCATE_STEPPING;
 127             bs->buffer = realloc(bs->buffer, bs->max_size_in_dword * sizeof(unsigned int));
 128         }
 129
 130         bs->buffer[pos + 1] = val;
 131     }
 132 }
 133
 134 static void
 135 avc_bitstream_put_ue(avc_bitstream *bs, unsigned int val)
 136 {
 137     int size_in_bits = 0;
 138     int tmp_val = ++val;
 139
 140     while (tmp_val) {
 141         tmp_val >>= 1;
 142         size_in_bits++;
 143     }
 144
 145     avc_bitstream_put_ui(bs, 0, size_in_bits - 1); // leading zero
 146     avc_bitstream_put_ui(bs, val, size_in_bits);
 147 }
 148
 149 static void
 150 avc_bitstream_put_se(avc_bitstream *bs, int val)
 151 {
 152     unsigned int new_val;
 153
 154     if (val <= 0)
 155         new_val = -2 * val;
 156     else
 157         new_val = 2 * val - 1;
 158
 159     avc_bitstream_put_ue(bs, new_val);
 160 }
 161
 162 static void
 163 avc_bitstream_byte_aligning(avc_bitstream *bs, int bit)
 164 {
 165     int bit_offset = (bs->bit_offset & 0x7);
 166     int bit_left = 8 - bit_offset;
 167     int new_val;
 168
 169     if (!bit_offset)
 170         return;
 171
 172     assert(bit == 0 || bit == 1);
 173
 174     if (bit)
 175         new_val = (1 << bit_left) - 1;
 176     else
 177         new_val = 0;
 178
 179     avc_bitstream_put_ui(bs, new_val, bit_left);
 180 }
 181 static void avc_rbsp_trailing_bits(avc_bitstream *bs)
 182 {
 183     avc_bitstream_put_ui(bs, 1, 1);
 184     avc_bitstream_byte_aligning(bs, 0);
 185 }
 186 static void nal_start_code_prefix(avc_bitstream *bs)
 187 {
 188     avc_bitstream_put_ui(bs, 0x00000001, 32);
 189 }
 190
 191 static void nal_header(avc_bitstream *bs, int nal_ref_idc, int nal_unit_type)
 192 {
 193     avc_bitstream_put_ui(bs, 0, 1);                /* forbidden_zero_bit: 0 */
 194     avc_bitstream_put_ui(bs, nal_ref_idc, 2);
 195     avc_bitstream_put_ui(bs, nal_unit_type, 5);
 196 }
 197
 198 static void
 199 slice_header(avc_bitstream *bs,
 200              VAEncSequenceParameterBufferH264 *sps_param,
 201              VAEncPictureParameterBufferH264 *pic_param,
 202              VAEncSliceParameterBufferH264 *slice_param)
 203 {
 204     int first_mb_in_slice = slice_param->macroblock_address;
 205
 206     avc_bitstream_put_ue(bs, first_mb_in_slice);        /* first_mb_in_slice: 0 */
 207     avc_bitstream_put_ue(bs, slice_param->slice_type);  /* slice_type */
 208     avc_bitstream_put_ue(bs, slice_param->pic_parameter_set_id);        /* pic_parameter_set_id: 0 */
 209     avc_bitstream_put_ui(bs, pic_param->frame_num, sps_param->seq_fields.bits.log2_max_frame_num_minus4 + 4); /* frame_num */
 210
 211     /* frame_mbs_only_flag == 1 */
 212     if (!sps_param->seq_fields.bits.frame_mbs_only_flag) {
 213         /* FIXME: */
 214         assert(0);
 215     }
 216
 217     if (pic_param->pic_fields.bits.idr_pic_flag)
 218         avc_bitstream_put_ue(bs, slice_param->idr_pic_id);              /* idr_pic_id: 0 */
 219
 220     if (sps_param->seq_fields.bits.pic_order_cnt_type == 0) {
 221         avc_bitstream_put_ui(bs, pic_param->CurrPic.TopFieldOrderCnt, sps_param->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4 + 4);
 222         /* pic_order_present_flag == 0 */
 223     } else {
 224         /* FIXME: */
 225         assert(0);
 226     }
 227
 228     /* redundant_pic_cnt_present_flag == 0 */
 229
 230     /* slice type */
 231     if (IS_P_SLICE(slice_param->slice_type)) {
 232         avc_bitstream_put_ui(bs, 0, 1);            /* num_ref_idx_active_override_flag: 0 */
 233
 234         /* ref_pic_list_reordering */
 235         avc_bitstream_put_ui(bs, 0, 1);            /* ref_pic_list_reordering_flag_l0: 0 */
 236     } else if (IS_B_SLICE(slice_param->slice_type)) {
 237         avc_bitstream_put_ui(bs, slice_param->direct_spatial_mv_pred_flag, 1);            /* direct_spatial_mv_pred: 1 */
 238         avc_bitstream_put_ui(bs, 0, 1);            /* num_ref_idx_active_override_flag: 0 */
 239
 240         /* ref_pic_list_reordering */
 241         avc_bitstream_put_ui(bs, 0, 1);            /* ref_pic_list_reordering_flag_l0: 0 */
 242         avc_bitstream_put_ui(bs, 0, 1);            /* ref_pic_list_reordering_flag_l1: 0 */
 243     }
 244
 245     if ((pic_param->pic_fields.bits.weighted_pred_flag &&
 246          IS_P_SLICE(slice_param->slice_type)) ||
 247         ((pic_param->pic_fields.bits.weighted_bipred_idc == 1) &&
 248          IS_B_SLICE(slice_param->slice_type))) {
 249         /* FIXME: fill weight/offset table */
 250         assert(0);
 251     }
 252
 253     /* dec_ref_pic_marking */
 254     if (pic_param->pic_fields.bits.reference_pic_flag) {     /* nal_ref_idc != 0 */
 255         unsigned char no_output_of_prior_pics_flag = 0;
 256         unsigned char long_term_reference_flag = 0;
 257         unsigned char adaptive_ref_pic_marking_mode_flag = 0;
 258
 259         if (pic_param->pic_fields.bits.idr_pic_flag) {
 260             avc_bitstream_put_ui(bs, no_output_of_prior_pics_flag, 1);            /* no_output_of_prior_pics_flag: 0 */
 261             avc_bitstream_put_ui(bs, long_term_reference_flag, 1);            /* long_term_reference_flag: 0 */
 262         } else {
 263             avc_bitstream_put_ui(bs, adaptive_ref_pic_marking_mode_flag, 1);            /* adaptive_ref_pic_marking_mode_flag: 0 */
 264         }
 265     }
 266
 267     if (pic_param->pic_fields.bits.entropy_coding_mode_flag &&
 268         !IS_I_SLICE(slice_param->slice_type))
 269         avc_bitstream_put_ue(bs, slice_param->cabac_init_idc);               /* cabac_init_idc: 0 */
 270
 271     avc_bitstream_put_se(bs, slice_param->slice_qp_delta);                   /* slice_qp_delta: 0 */
 272
 273     /* ignore for SP/SI */
 274
 275     if (pic_param->pic_fields.bits.deblocking_filter_control_present_flag) {
 276         avc_bitstream_put_ue(bs, slice_param->disable_deblocking_filter_idc);           /* disable_deblocking_filter_idc: 0 */
 277
 278         if (slice_param->disable_deblocking_filter_idc != 1) {
 279             avc_bitstream_put_se(bs, slice_param->slice_alpha_c0_offset_div2);          /* slice_alpha_c0_offset_div2: 2 */
 280             avc_bitstream_put_se(bs, slice_param->slice_beta_offset_div2);              /* slice_beta_offset_div2: 2 */
 281         }
 282     }
 283
 284     if (pic_param->pic_fields.bits.entropy_coding_mode_flag) {
 285         avc_bitstream_byte_aligning(bs, 1);
 286     }
 287 }
 288
 289 int
 290 build_avc_slice_header(VAEncSequenceParameterBufferH264 *sps_param,
 291                        VAEncPictureParameterBufferH264 *pic_param,
 292                        VAEncSliceParameterBufferH264 *slice_param,
 293                        unsigned char **slice_header_buffer)
 294 {
 295     avc_bitstream bs;
 296     int is_idr = !!pic_param->pic_fields.bits.idr_pic_flag;
 297
 298     avc_bitstream_start(&bs);
 299     nal_start_code_prefix(&bs);
 300
 301     if (IS_I_SLICE(slice_param->slice_type)) {
 302         nal_header(&bs, NAL_REF_IDC_HIGH, is_idr ? NAL_IDR : NAL_NON_IDR);
 303     } else if (IS_P_SLICE(slice_param->slice_type)) {
 304         nal_header(&bs, NAL_REF_IDC_MEDIUM, is_idr ? NAL_IDR : NAL_NON_IDR);
 305     } else {
 306         assert(IS_B_SLICE(slice_param->slice_type));
 307         nal_header(&bs, NAL_REF_IDC_NONE, is_idr ? NAL_IDR : NAL_NON_IDR);
 308     }
 309
 310     slice_header(&bs, sps_param, pic_param, slice_param);
 311
 312     avc_bitstream_end(&bs);
 313     *slice_header_buffer = (unsigned char *)bs.buffer;
 314
 315     return bs.bit_offset;
 316 }
 317
 318 int
 319 build_avc_sei_buffering_period(int cpb_removal_length,
 320                                unsigned int init_cpb_removal_delay,
 321                                unsigned int init_cpb_removal_delay_offset,
 322                                unsigned char **sei_buffer)
 323 {
 324     unsigned char *byte_buf;
 325     int byte_size, i;
 326
 327     avc_bitstream nal_bs;
 328     avc_bitstream sei_bs;
 329
 330     avc_bitstream_start(&sei_bs);
 331     avc_bitstream_put_ue(&sei_bs, 0);       /*seq_parameter_set_id*/
 332     avc_bitstream_put_ui(&sei_bs, init_cpb_removal_delay, cpb_removal_length);
 333     avc_bitstream_put_ui(&sei_bs, init_cpb_removal_delay_offset, cpb_removal_length);
 334     if ( sei_bs.bit_offset & 0x7) {
 335         avc_bitstream_put_ui(&sei_bs, 1, 1);
 336     }
 337     avc_bitstream_end(&sei_bs);
 338     byte_size = (sei_bs.bit_offset + 7) / 8;
 339
 340     avc_bitstream_start(&nal_bs);
 341     nal_start_code_prefix(&nal_bs);
 342     nal_header(&nal_bs, NAL_REF_IDC_NONE, NAL_SEI);
 343
 344     avc_bitstream_put_ui(&nal_bs, 0, 8);
 345     avc_bitstream_put_ui(&nal_bs, byte_size, 8);
 346
 347     byte_buf = (unsigned char *)sei_bs.buffer;
 348     for(i = 0; i < byte_size; i++) {
 349         avc_bitstream_put_ui(&nal_bs, byte_buf[i], 8);
 350     }
 351     free(byte_buf);
 352
 353     avc_rbsp_trailing_bits(&nal_bs);
 354     avc_bitstream_end(&nal_bs);
 355
 356     *sei_buffer = (unsigned char *)nal_bs.buffer;
 357
 358     return nal_bs.bit_offset;
 359 }
 360
 361 int
 362 build_avc_sei_pic_timing(unsigned int cpb_removal_length, unsigned int cpb_removal_delay,
 363                          unsigned int dpb_output_length, unsigned int dpb_output_delay,
 364                          unsigned char **sei_buffer)
 365 {
 366     unsigned char *byte_buf;
 367     int byte_size, i;
 368
 369     avc_bitstream nal_bs;
 370     avc_bitstream sei_bs;
 371
 372     avc_bitstream_start(&sei_bs);
 373     avc_bitstream_put_ui(&sei_bs, cpb_removal_delay, cpb_removal_length);
 374     avc_bitstream_put_ui(&sei_bs, dpb_output_delay, dpb_output_length);
 375     if ( sei_bs.bit_offset & 0x7) {
 376         avc_bitstream_put_ui(&sei_bs, 1, 1);
 377     }
 378     avc_bitstream_end(&sei_bs);
 379     byte_size = (sei_bs.bit_offset + 7) / 8;
 380
 381     avc_bitstream_start(&nal_bs);
 382     nal_start_code_prefix(&nal_bs);
 383     nal_header(&nal_bs, NAL_REF_IDC_NONE, NAL_SEI);
 384
 385     avc_bitstream_put_ui(&nal_bs, 0x01, 8);
 386     avc_bitstream_put_ui(&nal_bs, byte_size, 8);
 387
 388     byte_buf = (unsigned char *)sei_bs.buffer;
 389     for(i = 0; i < byte_size; i++) {
 390         avc_bitstream_put_ui(&nal_bs, byte_buf[i], 8);
 391     }
 392     free(byte_buf);
 393
 394     avc_rbsp_trailing_bits(&nal_bs);
 395     avc_bitstream_end(&nal_bs);
 396
 397     *sei_buffer = (unsigned char *)nal_bs.buffer;
 398
 399     return nal_bs.bit_offset;
 400 }
 401
 402