37 static void nal_h264_write_start_code_prefix(struct rbsp *rbsp)  in nal_h264_write_start_code_prefix()  argument
39 	u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8);  in nal_h264_write_start_code_prefix()
42 	if (DIV_ROUND_UP(rbsp->pos, 8) + i > rbsp->size) {  in nal_h264_write_start_code_prefix()
43 		rbsp->error = -EINVAL;  in nal_h264_write_start_code_prefix()
52 	rbsp->pos += i * 8;  in nal_h264_write_start_code_prefix()
55 static void nal_h264_read_start_code_prefix(struct rbsp *rbsp)  in nal_h264_read_start_code_prefix()  argument
57 	u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8);  in nal_h264_read_start_code_prefix()
60 	if (DIV_ROUND_UP(rbsp->pos, 8) + i > rbsp->size) {  in nal_h264_read_start_code_prefix()
61 		rbsp->error = -EINVAL;  in nal_h264_read_start_code_prefix()
66 		rbsp->error = -EINVAL;  in nal_h264_read_start_code_prefix()
70 	rbsp->pos += i * 8;  in nal_h264_read_start_code_prefix()
73 static void nal_h264_write_filler_data(struct rbsp *rbsp)  in nal_h264_write_filler_data()  argument
75 	u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8);  in nal_h264_write_filler_data()
79 	i = rbsp->size - DIV_ROUND_UP(rbsp->pos, 8) - 1;  in nal_h264_write_filler_data()
81 	rbsp->pos += i * 8;  in nal_h264_write_filler_data()
84 static void nal_h264_read_filler_data(struct rbsp *rbsp)  in nal_h264_read_filler_data()  argument
86 	u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8);  in nal_h264_read_filler_data()
89 		if (DIV_ROUND_UP(rbsp->pos, 8) > rbsp->size) {  in nal_h264_read_filler_data()
90 			rbsp->error = -EINVAL;  in nal_h264_read_filler_data()
95 		rbsp->pos += 8;  in nal_h264_read_filler_data()
99 static void nal_h264_rbsp_hrd_parameters(struct rbsp *rbsp,  in nal_h264_rbsp_hrd_parameters()  argument
105 		rbsp->error = -EINVAL;  in nal_h264_rbsp_hrd_parameters()
109 	rbsp_uev(rbsp, &hrd->cpb_cnt_minus1);  in nal_h264_rbsp_hrd_parameters()
110 	rbsp_bits(rbsp, 4, &hrd->bit_rate_scale);  in nal_h264_rbsp_hrd_parameters()
111 	rbsp_bits(rbsp, 4, &hrd->cpb_size_scale);  in nal_h264_rbsp_hrd_parameters()
114 		rbsp_uev(rbsp, &hrd->bit_rate_value_minus1[i]);  in nal_h264_rbsp_hrd_parameters()
115 		rbsp_uev(rbsp, &hrd->cpb_size_value_minus1[i]);  in nal_h264_rbsp_hrd_parameters()
116 		rbsp_bit(rbsp, &hrd->cbr_flag[i]);  in nal_h264_rbsp_hrd_parameters()
119 	rbsp_bits(rbsp, 5, &hrd->initial_cpb_removal_delay_length_minus1);  in nal_h264_rbsp_hrd_parameters()
120 	rbsp_bits(rbsp, 5, &hrd->cpb_removal_delay_length_minus1);  in nal_h264_rbsp_hrd_parameters()
121 	rbsp_bits(rbsp, 5, &hrd->dpb_output_delay_length_minus1);  in nal_h264_rbsp_hrd_parameters()
122 	rbsp_bits(rbsp, 5, &hrd->time_offset_length);  in nal_h264_rbsp_hrd_parameters()
125 static void nal_h264_rbsp_vui_parameters(struct rbsp *rbsp,  in nal_h264_rbsp_vui_parameters()  argument
129 		rbsp->error = -EINVAL;  in nal_h264_rbsp_vui_parameters()
133 	rbsp_bit(rbsp, &vui->aspect_ratio_info_present_flag);  in nal_h264_rbsp_vui_parameters()
135 		rbsp_bits(rbsp, 8, &vui->aspect_ratio_idc);  in nal_h264_rbsp_vui_parameters()
137 			rbsp_bits(rbsp, 16, &vui->sar_width);  in nal_h264_rbsp_vui_parameters()
138 			rbsp_bits(rbsp, 16, &vui->sar_height);  in nal_h264_rbsp_vui_parameters()
142 	rbsp_bit(rbsp, &vui->overscan_info_present_flag);  in nal_h264_rbsp_vui_parameters()
144 		rbsp_bit(rbsp, &vui->overscan_appropriate_flag);  in nal_h264_rbsp_vui_parameters()
146 	rbsp_bit(rbsp, &vui->video_signal_type_present_flag);  in nal_h264_rbsp_vui_parameters()
148 		rbsp_bits(rbsp, 3, &vui->video_format);  in nal_h264_rbsp_vui_parameters()
149 		rbsp_bit(rbsp, &vui->video_full_range_flag);  in nal_h264_rbsp_vui_parameters()
151 		rbsp_bit(rbsp, &vui->colour_description_present_flag);  in nal_h264_rbsp_vui_parameters()
153 			rbsp_bits(rbsp, 8, &vui->colour_primaries);  in nal_h264_rbsp_vui_parameters()
154 			rbsp_bits(rbsp, 8, &vui->transfer_characteristics);  in nal_h264_rbsp_vui_parameters()
155 			rbsp_bits(rbsp, 8, &vui->matrix_coefficients);  in nal_h264_rbsp_vui_parameters()
159 	rbsp_bit(rbsp, &vui->chroma_loc_info_present_flag);  in nal_h264_rbsp_vui_parameters()
161 		rbsp_uev(rbsp, &vui->chroma_sample_loc_type_top_field);  in nal_h264_rbsp_vui_parameters()
162 		rbsp_uev(rbsp, &vui->chroma_sample_loc_type_bottom_field);  in nal_h264_rbsp_vui_parameters()
165 	rbsp_bit(rbsp, &vui->timing_info_present_flag);  in nal_h264_rbsp_vui_parameters()
167 		rbsp_bits(rbsp, 32, &vui->num_units_in_tick);  in nal_h264_rbsp_vui_parameters()
168 		rbsp_bits(rbsp, 32, &vui->time_scale);  in nal_h264_rbsp_vui_parameters()
169 		rbsp_bit(rbsp, &vui->fixed_frame_rate_flag);  in nal_h264_rbsp_vui_parameters()
172 	rbsp_bit(rbsp, &vui->nal_hrd_parameters_present_flag);  in nal_h264_rbsp_vui_parameters()
174 		nal_h264_rbsp_hrd_parameters(rbsp, &vui->nal_hrd_parameters);  in nal_h264_rbsp_vui_parameters()
176 	rbsp_bit(rbsp, &vui->vcl_hrd_parameters_present_flag);  in nal_h264_rbsp_vui_parameters()
178 		nal_h264_rbsp_hrd_parameters(rbsp, &vui->vcl_hrd_parameters);  in nal_h264_rbsp_vui_parameters()
182 		rbsp_bit(rbsp, &vui->low_delay_hrd_flag);  in nal_h264_rbsp_vui_parameters()
184 	rbsp_bit(rbsp, &vui->pic_struct_present_flag);  in nal_h264_rbsp_vui_parameters()
186 	rbsp_bit(rbsp, &vui->bitstream_restriction_flag);  in nal_h264_rbsp_vui_parameters()
188 		rbsp_bit(rbsp, &vui->motion_vectors_over_pic_boundaries_flag);  in nal_h264_rbsp_vui_parameters()
189 		rbsp_uev(rbsp, &vui->max_bytes_per_pic_denom);  in nal_h264_rbsp_vui_parameters()
190 		rbsp_uev(rbsp, &vui->max_bits_per_mb_denom);  in nal_h264_rbsp_vui_parameters()
191 		rbsp_uev(rbsp, &vui->log2_max_mv_length_horizontal);  in nal_h264_rbsp_vui_parameters()
192 		rbsp_uev(rbsp, &vui->log21_max_mv_length_vertical);  in nal_h264_rbsp_vui_parameters()
193 		rbsp_uev(rbsp, &vui->max_num_reorder_frames);  in nal_h264_rbsp_vui_parameters()
194 		rbsp_uev(rbsp, &vui->max_dec_frame_buffering);  in nal_h264_rbsp_vui_parameters()
198 static void nal_h264_rbsp_sps(struct rbsp *rbsp, struct nal_h264_sps *sps)  in nal_h264_rbsp_sps()  argument
203 		rbsp->error = -EINVAL;  in nal_h264_rbsp_sps()
207 	rbsp_bits(rbsp, 8, &sps->profile_idc);  in nal_h264_rbsp_sps()
208 	rbsp_bit(rbsp, &sps->constraint_set0_flag);  in nal_h264_rbsp_sps()
209 	rbsp_bit(rbsp, &sps->constraint_set1_flag);  in nal_h264_rbsp_sps()
210 	rbsp_bit(rbsp, &sps->constraint_set2_flag);  in nal_h264_rbsp_sps()
211 	rbsp_bit(rbsp, &sps->constraint_set3_flag);  in nal_h264_rbsp_sps()
212 	rbsp_bit(rbsp, &sps->constraint_set4_flag);  in nal_h264_rbsp_sps()
213 	rbsp_bit(rbsp, &sps->constraint_set5_flag);  in nal_h264_rbsp_sps()
214 	rbsp_bits(rbsp, 2, &sps->reserved_zero_2bits);  in nal_h264_rbsp_sps()
215 	rbsp_bits(rbsp, 8, &sps->level_idc);  in nal_h264_rbsp_sps()
217 	rbsp_uev(rbsp, &sps->seq_parameter_set_id);  in nal_h264_rbsp_sps()
226 		rbsp_uev(rbsp, &sps->chroma_format_idc);  in nal_h264_rbsp_sps()
229 			rbsp_bit(rbsp, &sps->separate_colour_plane_flag);  in nal_h264_rbsp_sps()
230 		rbsp_uev(rbsp, &sps->bit_depth_luma_minus8);  in nal_h264_rbsp_sps()
231 		rbsp_uev(rbsp, &sps->bit_depth_chroma_minus8);  in nal_h264_rbsp_sps()
232 		rbsp_bit(rbsp, &sps->qpprime_y_zero_transform_bypass_flag);  in nal_h264_rbsp_sps()
233 		rbsp_bit(rbsp, &sps->seq_scaling_matrix_present_flag);  in nal_h264_rbsp_sps()
235 			rbsp->error = -EINVAL;  in nal_h264_rbsp_sps()
238 	rbsp_uev(rbsp, &sps->log2_max_frame_num_minus4);  in nal_h264_rbsp_sps()
240 	rbsp_uev(rbsp, &sps->pic_order_cnt_type);  in nal_h264_rbsp_sps()
243 		rbsp_uev(rbsp, &sps->log2_max_pic_order_cnt_lsb_minus4);  in nal_h264_rbsp_sps()
246 		rbsp_bit(rbsp, &sps->delta_pic_order_always_zero_flag);  in nal_h264_rbsp_sps()
247 		rbsp_sev(rbsp, &sps->offset_for_non_ref_pic);  in nal_h264_rbsp_sps()
248 		rbsp_sev(rbsp, &sps->offset_for_top_to_bottom_field);  in nal_h264_rbsp_sps()
250 		rbsp_uev(rbsp, &sps->num_ref_frames_in_pic_order_cnt_cycle);  in nal_h264_rbsp_sps()
252 			rbsp_sev(rbsp, &sps->offset_for_ref_frame[i]);  in nal_h264_rbsp_sps()
255 		rbsp->error = -EINVAL;  in nal_h264_rbsp_sps()
259 	rbsp_uev(rbsp, &sps->max_num_ref_frames);  in nal_h264_rbsp_sps()
260 	rbsp_bit(rbsp, &sps->gaps_in_frame_num_value_allowed_flag);  in nal_h264_rbsp_sps()
261 	rbsp_uev(rbsp, &sps->pic_width_in_mbs_minus1);  in nal_h264_rbsp_sps()
262 	rbsp_uev(rbsp, &sps->pic_height_in_map_units_minus1);  in nal_h264_rbsp_sps()
264 	rbsp_bit(rbsp, &sps->frame_mbs_only_flag);  in nal_h264_rbsp_sps()
266 		rbsp_bit(rbsp, &sps->mb_adaptive_frame_field_flag);  in nal_h264_rbsp_sps()
268 	rbsp_bit(rbsp, &sps->direct_8x8_inference_flag);  in nal_h264_rbsp_sps()
270 	rbsp_bit(rbsp, &sps->frame_cropping_flag);  in nal_h264_rbsp_sps()
272 		rbsp_uev(rbsp, &sps->crop_left);  in nal_h264_rbsp_sps()
273 		rbsp_uev(rbsp, &sps->crop_right);  in nal_h264_rbsp_sps()
274 		rbsp_uev(rbsp, &sps->crop_top);  in nal_h264_rbsp_sps()
275 		rbsp_uev(rbsp, &sps->crop_bottom);  in nal_h264_rbsp_sps()
278 	rbsp_bit(rbsp, &sps->vui_parameters_present_flag);  in nal_h264_rbsp_sps()
280 		nal_h264_rbsp_vui_parameters(rbsp, &sps->vui);  in nal_h264_rbsp_sps()
283 static void nal_h264_rbsp_pps(struct rbsp *rbsp, struct nal_h264_pps *pps)  in nal_h264_rbsp_pps()  argument
287 	rbsp_uev(rbsp, &pps->pic_parameter_set_id);  in nal_h264_rbsp_pps()
288 	rbsp_uev(rbsp, &pps->seq_parameter_set_id);  in nal_h264_rbsp_pps()
289 	rbsp_bit(rbsp, &pps->entropy_coding_mode_flag);  in nal_h264_rbsp_pps()
290 	rbsp_bit(rbsp, &pps->bottom_field_pic_order_in_frame_present_flag);  in nal_h264_rbsp_pps()
291 	rbsp_uev(rbsp, &pps->num_slice_groups_minus1);  in nal_h264_rbsp_pps()
293 		rbsp_uev(rbsp, &pps->slice_group_map_type);  in nal_h264_rbsp_pps()
297 				rbsp_uev(rbsp, &pps->run_length_minus1[i]);  in nal_h264_rbsp_pps()
301 				rbsp_uev(rbsp, &pps->top_left[i]);  in nal_h264_rbsp_pps()
302 				rbsp_uev(rbsp, &pps->bottom_right[i]);  in nal_h264_rbsp_pps()
306 			rbsp_bit(rbsp, &pps->slice_group_change_direction_flag);  in nal_h264_rbsp_pps()
307 			rbsp_uev(rbsp, &pps->slice_group_change_rate_minus1);  in nal_h264_rbsp_pps()
310 			rbsp_uev(rbsp, &pps->pic_size_in_map_units_minus1);  in nal_h264_rbsp_pps()
312 				rbsp_bits(rbsp,  in nal_h264_rbsp_pps()
320 	rbsp_uev(rbsp, &pps->num_ref_idx_l0_default_active_minus1);  in nal_h264_rbsp_pps()
321 	rbsp_uev(rbsp, &pps->num_ref_idx_l1_default_active_minus1);  in nal_h264_rbsp_pps()
322 	rbsp_bit(rbsp, &pps->weighted_pred_flag);  in nal_h264_rbsp_pps()
323 	rbsp_bits(rbsp, 2, &pps->weighted_bipred_idc);  in nal_h264_rbsp_pps()
324 	rbsp_sev(rbsp, &pps->pic_init_qp_minus26);  in nal_h264_rbsp_pps()
325 	rbsp_sev(rbsp, &pps->pic_init_qs_minus26);  in nal_h264_rbsp_pps()
326 	rbsp_sev(rbsp, &pps->chroma_qp_index_offset);  in nal_h264_rbsp_pps()
327 	rbsp_bit(rbsp, &pps->deblocking_filter_control_present_flag);  in nal_h264_rbsp_pps()
328 	rbsp_bit(rbsp, &pps->constrained_intra_pred_flag);  in nal_h264_rbsp_pps()
329 	rbsp_bit(rbsp, &pps->redundant_pic_cnt_present_flag);  in nal_h264_rbsp_pps()
331 		rbsp_bit(rbsp, &pps->transform_8x8_mode_flag);  in nal_h264_rbsp_pps()
332 		rbsp_bit(rbsp, &pps->pic_scaling_matrix_present_flag);  in nal_h264_rbsp_pps()
334 			rbsp->error = -EINVAL;  in nal_h264_rbsp_pps()
335 		rbsp_sev(rbsp, &pps->second_chroma_qp_index_offset);  in nal_h264_rbsp_pps()
356 	struct rbsp rbsp;  in nal_h264_write_sps()  local
364 	rbsp_init(&rbsp, dest, n, &write);  in nal_h264_write_sps()
366 	nal_h264_write_start_code_prefix(&rbsp);  in nal_h264_write_sps()
368 	rbsp_bit(&rbsp, &forbidden_zero_bit);  in nal_h264_write_sps()
369 	rbsp_bits(&rbsp, 2, &nal_ref_idc);  in nal_h264_write_sps()
370 	rbsp_bits(&rbsp, 5, &nal_unit_type);  in nal_h264_write_sps()
372 	nal_h264_rbsp_sps(&rbsp, sps);  in nal_h264_write_sps()
374 	rbsp_trailing_bits(&rbsp);  in nal_h264_write_sps()
376 	if (rbsp.error)  in nal_h264_write_sps()
377 		return rbsp.error;  in nal_h264_write_sps()
379 	return DIV_ROUND_UP(rbsp.pos, 8);  in nal_h264_write_sps()
397 	struct rbsp rbsp;  in nal_h264_read_sps()  local
405 	rbsp_init(&rbsp, src, n, &read);  in nal_h264_read_sps()
407 	nal_h264_read_start_code_prefix(&rbsp);  in nal_h264_read_sps()
409 	rbsp_bit(&rbsp, &forbidden_zero_bit);  in nal_h264_read_sps()
410 	rbsp_bits(&rbsp, 2, &nal_ref_idc);  in nal_h264_read_sps()
411 	rbsp_bits(&rbsp, 5, &nal_unit_type);  in nal_h264_read_sps()
413 	if (rbsp.error ||  in nal_h264_read_sps()
419 	nal_h264_rbsp_sps(&rbsp, sps);  in nal_h264_read_sps()
421 	rbsp_trailing_bits(&rbsp);  in nal_h264_read_sps()
423 	if (rbsp.error)  in nal_h264_read_sps()
424 		return rbsp.error;  in nal_h264_read_sps()
426 	return DIV_ROUND_UP(rbsp.pos, 8);  in nal_h264_read_sps()
447 	struct rbsp rbsp;  in nal_h264_write_pps()  local
455 	rbsp_init(&rbsp, dest, n, &write);  in nal_h264_write_pps()
457 	nal_h264_write_start_code_prefix(&rbsp);  in nal_h264_write_pps()
460 	rbsp_bit(&rbsp, &forbidden_zero_bit);  in nal_h264_write_pps()
461 	rbsp_bits(&rbsp, 2, &nal_ref_idc);  in nal_h264_write_pps()
462 	rbsp_bits(&rbsp, 5, &nal_unit_type);  in nal_h264_write_pps()
464 	nal_h264_rbsp_pps(&rbsp, pps);  in nal_h264_write_pps()
466 	rbsp_trailing_bits(&rbsp);  in nal_h264_write_pps()
468 	if (rbsp.error)  in nal_h264_write_pps()
469 		return rbsp.error;  in nal_h264_write_pps()
471 	return DIV_ROUND_UP(rbsp.pos, 8);  in nal_h264_write_pps()
489 	struct rbsp rbsp;  in nal_h264_read_pps()  local
494 	rbsp_init(&rbsp, src, n, &read);  in nal_h264_read_pps()
496 	nal_h264_read_start_code_prefix(&rbsp);  in nal_h264_read_pps()
499 	rbsp.pos += 8;  in nal_h264_read_pps()
501 	nal_h264_rbsp_pps(&rbsp, pps);  in nal_h264_read_pps()
503 	rbsp_trailing_bits(&rbsp);  in nal_h264_read_pps()
505 	if (rbsp.error)  in nal_h264_read_pps()
506 		return rbsp.error;  in nal_h264_read_pps()
508 	return DIV_ROUND_UP(rbsp.pos, 8);  in nal_h264_read_pps()
531 	struct rbsp rbsp;  in nal_h264_write_filler()  local
539 	rbsp_init(&rbsp, dest, n, &write);  in nal_h264_write_filler()
541 	nal_h264_write_start_code_prefix(&rbsp);  in nal_h264_write_filler()
543 	rbsp_bit(&rbsp, &forbidden_zero_bit);  in nal_h264_write_filler()
544 	rbsp_bits(&rbsp, 2, &nal_ref_idc);  in nal_h264_write_filler()
545 	rbsp_bits(&rbsp, 5, &nal_unit_type);  in nal_h264_write_filler()
547 	nal_h264_write_filler_data(&rbsp);  in nal_h264_write_filler()
549 	rbsp_trailing_bits(&rbsp);  in nal_h264_write_filler()
551 	return DIV_ROUND_UP(rbsp.pos, 8);  in nal_h264_write_filler()
574 	struct rbsp rbsp;  in nal_h264_read_filler()  local
582 	rbsp_init(&rbsp, src, n, &read);  in nal_h264_read_filler()
584 	nal_h264_read_start_code_prefix(&rbsp);  in nal_h264_read_filler()
586 	rbsp_bit(&rbsp, &forbidden_zero_bit);  in nal_h264_read_filler()
587 	rbsp_bits(&rbsp, 2, &nal_ref_idc);  in nal_h264_read_filler()
588 	rbsp_bits(&rbsp, 5, &nal_unit_type);  in nal_h264_read_filler()
590 	if (rbsp.error)  in nal_h264_read_filler()
591 		return rbsp.error;  in nal_h264_read_filler()
597 	nal_h264_read_filler_data(&rbsp);  in nal_h264_read_filler()
598 	rbsp_trailing_bits(&rbsp);  in nal_h264_read_filler()
600 	if (rbsp.error)  in nal_h264_read_filler()
601 		return rbsp.error;  in nal_h264_read_filler()
603 	return DIV_ROUND_UP(rbsp.pos, 8);  in nal_h264_read_filler()