vaapi-recorder.c 27.2 KB
Newer Older
1
/*
2
 * Copyright (c) 2012 Intel Corporation. All Rights Reserved.
3 4
 * Copyright © 2013 Intel Corporation
 *
5 6
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
7 8
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
9
 * distribute, sublicense, and/or sell copies of the Software, and to
10 11 12 13
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
14 15
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
16
 *
17 18 19 20 21 22 23 24
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
25 26
 */

27 28
#include "config.h"

29 30 31 32
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
33
#include <assert.h>
34
#include <errno.h>
35 36 37 38 39

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

40
#include <pthread.h>
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

#include <va/va.h>
#include <va/va_drm.h>
#include <va/va_drmcommon.h>
#include <va/va_enc_h264.h>
#include <va/va_vpp.h>

#include "compositor.h"
#include "vaapi-recorder.h"

#define NAL_REF_IDC_NONE        0
#define NAL_REF_IDC_LOW         1
#define NAL_REF_IDC_MEDIUM      2
#define NAL_REF_IDC_HIGH        3

#define NAL_NON_IDR             1
#define NAL_IDR                 5
#define NAL_SPS                 7
#define NAL_PPS                 8
#define NAL_SEI                 6

#define SLICE_TYPE_P            0
#define SLICE_TYPE_B            1
#define SLICE_TYPE_I            2

#define ENTROPY_MODE_CAVLC      0
#define ENTROPY_MODE_CABAC      1

#define PROFILE_IDC_BASELINE    66
#define PROFILE_IDC_MAIN        77
#define PROFILE_IDC_HIGH        100

struct vaapi_recorder {
74
	int drm_fd, output_fd;
75 76 77
	int width, height;
	int frame_count;

78
	int error;
79 80 81 82 83 84 85 86 87 88
	int destroying;
	pthread_t worker_thread;
	pthread_mutex_t mutex;
	pthread_cond_t input_cond;

	struct {
		int valid;
		int prime_fd, stride;
	} input;

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
	VADisplay va_dpy;

	/* video post processing is used for colorspace conversion */
	struct {
		VAConfigID cfg;
		VAContextID ctx;
		VABufferID pipeline_buf;
		VASurfaceID output;
	} vpp;

	struct {
		VAConfigID cfg;
		VAContextID ctx;
		VASurfaceID reference_picture[3];

		int intra_period;
		int output_size;
		int constraint_set_flag;

		struct {
			VAEncSequenceParameterBufferH264 seq;
			VAEncPictureParameterBufferH264 pic;
			VAEncSliceParameterBufferH264 slice;
		} param;
	} encoder;
};

116 117 118
static void *
worker_thread_function(void *);

119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746
/* bistream code used for writing the packed headers */

#define BITSTREAM_ALLOCATE_STEPPING	 4096

struct bitstream {
	unsigned int *buffer;
	int bit_offset;
	int max_size_in_dword;
};

static unsigned int
va_swap32(unsigned int val)
{
	unsigned char *pval = (unsigned char *)&val;

	return ((pval[0] << 24) |
		(pval[1] << 16) |
		(pval[2] << 8)  |
		(pval[3] << 0));
}

static void
bitstream_start(struct bitstream *bs)
{
	bs->max_size_in_dword = BITSTREAM_ALLOCATE_STEPPING;
	bs->buffer = calloc(bs->max_size_in_dword * sizeof(int), 1);
	bs->bit_offset = 0;
}

static void
bitstream_end(struct bitstream *bs)
{
	int pos = (bs->bit_offset >> 5);
	int bit_offset = (bs->bit_offset & 0x1f);
	int bit_left = 32 - bit_offset;

	if (bit_offset) {
		bs->buffer[pos] = va_swap32((bs->buffer[pos] << bit_left));
	}
}

static void
bitstream_put_ui(struct bitstream *bs, unsigned int val, int size_in_bits)
{
	int pos = (bs->bit_offset >> 5);
	int bit_offset = (bs->bit_offset & 0x1f);
	int bit_left = 32 - bit_offset;

	if (!size_in_bits)
		return;

	bs->bit_offset += size_in_bits;

	if (bit_left > size_in_bits) {
		bs->buffer[pos] = (bs->buffer[pos] << size_in_bits | val);
		return;
	}

	size_in_bits -= bit_left;
	bs->buffer[pos] =
		(bs->buffer[pos] << bit_left) | (val >> size_in_bits);
	bs->buffer[pos] = va_swap32(bs->buffer[pos]);

	if (pos + 1 == bs->max_size_in_dword) {
		bs->max_size_in_dword += BITSTREAM_ALLOCATE_STEPPING;
		bs->buffer =
			realloc(bs->buffer,
				bs->max_size_in_dword * sizeof(unsigned int));
	}

	bs->buffer[pos + 1] = val;
}

static void
bitstream_put_ue(struct bitstream *bs, unsigned int val)
{
	int size_in_bits = 0;
	int tmp_val = ++val;

	while (tmp_val) {
		tmp_val >>= 1;
		size_in_bits++;
	}

	bitstream_put_ui(bs, 0, size_in_bits - 1); // leading zero
	bitstream_put_ui(bs, val, size_in_bits);
}

static void
bitstream_put_se(struct bitstream *bs, int val)
{
	unsigned int new_val;

	if (val <= 0)
		new_val = -2 * val;
	else
		new_val = 2 * val - 1;

	bitstream_put_ue(bs, new_val);
}

static void
bitstream_byte_aligning(struct bitstream *bs, int bit)
{
	int bit_offset = (bs->bit_offset & 0x7);
	int bit_left = 8 - bit_offset;
	int new_val;

	if (!bit_offset)
		return;

	if (bit)
		new_val = (1 << bit_left) - 1;
	else
		new_val = 0;

	bitstream_put_ui(bs, new_val, bit_left);
}

static VAStatus
encoder_create_config(struct vaapi_recorder *r)
{
	VAConfigAttrib attrib[2];
	VAStatus status;

	/* FIXME: should check if VAEntrypointEncSlice is supported */

	/* FIXME: should check if specified attributes are supported */

	attrib[0].type = VAConfigAttribRTFormat;
	attrib[0].value = VA_RT_FORMAT_YUV420;

	attrib[1].type = VAConfigAttribRateControl;
	attrib[1].value = VA_RC_CQP;

	status = vaCreateConfig(r->va_dpy, VAProfileH264Main,
				VAEntrypointEncSlice, attrib, 2,
				&r->encoder.cfg);
	if (status != VA_STATUS_SUCCESS)
		return status;

	status = vaCreateContext(r->va_dpy, r->encoder.cfg,
				 r->width, r->height, VA_PROGRESSIVE, 0, 0,
				 &r->encoder.ctx);
	if (status != VA_STATUS_SUCCESS) {
		vaDestroyConfig(r->va_dpy, r->encoder.cfg);
		return status;
	}

	return VA_STATUS_SUCCESS;
}

static void
encoder_destroy_config(struct vaapi_recorder *r)
{
	vaDestroyContext(r->va_dpy, r->encoder.ctx);
	vaDestroyConfig(r->va_dpy, r->encoder.cfg);
}

static void
encoder_init_seq_parameters(struct vaapi_recorder *r)
{
	int width_in_mbs, height_in_mbs;
	int frame_cropping_flag = 0;
	int frame_crop_bottom_offset = 0;

	width_in_mbs = (r->width + 15) / 16;
	height_in_mbs = (r->height + 15) / 16;

	r->encoder.param.seq.level_idc = 41;
	r->encoder.param.seq.intra_period = r->encoder.intra_period;
	r->encoder.param.seq.max_num_ref_frames = 4;
	r->encoder.param.seq.picture_width_in_mbs = width_in_mbs;
	r->encoder.param.seq.picture_height_in_mbs = height_in_mbs;
	r->encoder.param.seq.seq_fields.bits.frame_mbs_only_flag = 1;

	/* Tc = num_units_in_tick / time_scale */
	r->encoder.param.seq.time_scale = 1800;
	r->encoder.param.seq.num_units_in_tick = 15;

	if (height_in_mbs * 16 - r->height > 0) {
		frame_cropping_flag = 1;
		frame_crop_bottom_offset = (height_in_mbs * 16 - r->height) / 2;
	}

	r->encoder.param.seq.frame_cropping_flag = frame_cropping_flag;
	r->encoder.param.seq.frame_crop_bottom_offset = frame_crop_bottom_offset;

	r->encoder.param.seq.seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4 = 2;
}

static VABufferID
encoder_update_seq_parameters(struct vaapi_recorder *r)
{
	VABufferID seq_buf;
	VAStatus status;

	status = vaCreateBuffer(r->va_dpy, r->encoder.ctx,
				VAEncSequenceParameterBufferType,
				sizeof(r->encoder.param.seq),
				1, &r->encoder.param.seq,
				&seq_buf);

	if (status == VA_STATUS_SUCCESS)
		return seq_buf;
	else
		return VA_INVALID_ID;
}

static void
encoder_init_pic_parameters(struct vaapi_recorder *r)
{
	VAEncPictureParameterBufferH264 *pic = &r->encoder.param.pic;

	pic->pic_init_qp = 0;

	/* ENTROPY_MODE_CABAC */
	pic->pic_fields.bits.entropy_coding_mode_flag = 1;

	pic->pic_fields.bits.deblocking_filter_control_present_flag = 1;
}

static VABufferID
encoder_update_pic_parameters(struct vaapi_recorder *r,
			      VABufferID output_buf)
{
	VAEncPictureParameterBufferH264 *pic = &r->encoder.param.pic;
	VAStatus status;
	VABufferID pic_param_buf;
	VASurfaceID curr_pic, pic0;

	curr_pic = r->encoder.reference_picture[r->frame_count % 2];
	pic0 = r->encoder.reference_picture[(r->frame_count + 1) % 2];

	pic->CurrPic.picture_id = curr_pic;
	pic->CurrPic.TopFieldOrderCnt = r->frame_count * 2;
	pic->ReferenceFrames[0].picture_id = pic0;
	pic->ReferenceFrames[1].picture_id = r->encoder.reference_picture[2];
	pic->ReferenceFrames[2].picture_id = VA_INVALID_ID;

	pic->coded_buf = output_buf;
	pic->frame_num = r->frame_count;

	pic->pic_fields.bits.idr_pic_flag = (r->frame_count == 0);
	pic->pic_fields.bits.reference_pic_flag = 1;

	status = vaCreateBuffer(r->va_dpy, r->encoder.ctx,
				VAEncPictureParameterBufferType,
				sizeof(VAEncPictureParameterBufferH264), 1,
				pic, &pic_param_buf);

	if (status == VA_STATUS_SUCCESS)
		return pic_param_buf;
	else
		return VA_INVALID_ID;
}

static VABufferID
encoder_update_slice_parameter(struct vaapi_recorder *r, int slice_type)
{
	VABufferID slice_param_buf;
	VAStatus status;

	int width_in_mbs = (r->width + 15) / 16;
	int height_in_mbs = (r->height + 15) / 16;

	memset(&r->encoder.param.slice, 0, sizeof r->encoder.param.slice);

	r->encoder.param.slice.num_macroblocks = width_in_mbs * height_in_mbs;
	r->encoder.param.slice.slice_type = slice_type;

	r->encoder.param.slice.slice_alpha_c0_offset_div2 = 2;
	r->encoder.param.slice.slice_beta_offset_div2 = 2;

	status = vaCreateBuffer(r->va_dpy, r->encoder.ctx,
				VAEncSliceParameterBufferType,
				sizeof(r->encoder.param.slice), 1,
				&r->encoder.param.slice,
				&slice_param_buf);

	if (status == VA_STATUS_SUCCESS)
		return slice_param_buf;
	else
		return VA_INVALID_ID;
}

static VABufferID
encoder_update_misc_hdr_parameter(struct vaapi_recorder *r)
{
	VAEncMiscParameterBuffer *misc_param;
	VAEncMiscParameterHRD *hrd;
	VABufferID buffer;
	VAStatus status;

	int total_size =
		sizeof(VAEncMiscParameterBuffer) +
		sizeof(VAEncMiscParameterRateControl);

	status = vaCreateBuffer(r->va_dpy, r->encoder.ctx,
				VAEncMiscParameterBufferType, total_size,
				1, NULL, &buffer);
	if (status != VA_STATUS_SUCCESS)
		return VA_INVALID_ID;

	status = vaMapBuffer(r->va_dpy, buffer, (void **) &misc_param);
	if (status != VA_STATUS_SUCCESS) {
		vaDestroyBuffer(r->va_dpy, buffer);
		return VA_INVALID_ID;
	}

	misc_param->type = VAEncMiscParameterTypeHRD;
	hrd = (VAEncMiscParameterHRD *) misc_param->data;

	hrd->initial_buffer_fullness = 0;
	hrd->buffer_size = 0;

	vaUnmapBuffer(r->va_dpy, buffer);

	return buffer;
}

static int
setup_encoder(struct vaapi_recorder *r)
{
	VAStatus status;

	status = encoder_create_config(r);
	if (status != VA_STATUS_SUCCESS) {
		return -1;
	}

	status = vaCreateSurfaces(r->va_dpy, VA_RT_FORMAT_YUV420,
				  r->width, r->height,
				  r->encoder.reference_picture, 3,
				  NULL, 0);
	if (status != VA_STATUS_SUCCESS) {
		encoder_destroy_config(r);
		return -1;
	}

	/* VAProfileH264Main */
	r->encoder.constraint_set_flag |= (1 << 1); /* Annex A.2.2 */

	r->encoder.output_size = r->width * r->height;

	r->encoder.intra_period = 30;

	encoder_init_seq_parameters(r);
	encoder_init_pic_parameters(r);

	return 0;
}

static void
encoder_destroy(struct vaapi_recorder *r)
{
	vaDestroySurfaces(r->va_dpy, r->encoder.reference_picture, 3);

	encoder_destroy_config(r);
}

static void
nal_start_code_prefix(struct bitstream *bs)
{
	bitstream_put_ui(bs, 0x00000001, 32);
}

static void
nal_header(struct bitstream *bs, int nal_ref_idc, int nal_unit_type)
{
	/* forbidden_zero_bit: 0 */
	bitstream_put_ui(bs, 0, 1);

	bitstream_put_ui(bs, nal_ref_idc, 2);
	bitstream_put_ui(bs, nal_unit_type, 5);
}

static void
rbsp_trailing_bits(struct bitstream *bs)
{
	bitstream_put_ui(bs, 1, 1);
	bitstream_byte_aligning(bs, 0);
}

static void sps_rbsp(struct bitstream *bs,
		     VAEncSequenceParameterBufferH264 *seq,
		     int constraint_set_flag)
{
	int i;

	bitstream_put_ui(bs, PROFILE_IDC_MAIN, 8);

	/* constraint_set[0-3] flag */
	for (i = 0; i < 4; i++) {
		int set = (constraint_set_flag & (1 << i)) ? 1 : 0;
		bitstream_put_ui(bs, set, 1);
	}

	/* reserved_zero_4bits */
	bitstream_put_ui(bs, 0, 4);
	bitstream_put_ui(bs, seq->level_idc, 8);
	bitstream_put_ue(bs, seq->seq_parameter_set_id);

	bitstream_put_ue(bs, seq->seq_fields.bits.log2_max_frame_num_minus4);
	bitstream_put_ue(bs, seq->seq_fields.bits.pic_order_cnt_type);
	bitstream_put_ue(bs,
			 seq->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4);

	bitstream_put_ue(bs, seq->max_num_ref_frames);

	/* gaps_in_frame_num_value_allowed_flag */
	bitstream_put_ui(bs, 0, 1);

	/* pic_width_in_mbs_minus1, pic_height_in_map_units_minus1 */
	bitstream_put_ue(bs, seq->picture_width_in_mbs - 1);
	bitstream_put_ue(bs, seq->picture_height_in_mbs - 1);

	bitstream_put_ui(bs, seq->seq_fields.bits.frame_mbs_only_flag, 1);
	bitstream_put_ui(bs, seq->seq_fields.bits.direct_8x8_inference_flag, 1);

	bitstream_put_ui(bs, seq->frame_cropping_flag, 1);

	if (seq->frame_cropping_flag) {
		bitstream_put_ue(bs, seq->frame_crop_left_offset);
		bitstream_put_ue(bs, seq->frame_crop_right_offset);
		bitstream_put_ue(bs, seq->frame_crop_top_offset);
		bitstream_put_ue(bs, seq->frame_crop_bottom_offset);
	}

	/* vui_parameters_present_flag */
	bitstream_put_ui(bs, 1, 1);

	/* aspect_ratio_info_present_flag */
	bitstream_put_ui(bs, 0, 1);
	/* overscan_info_present_flag */
	bitstream_put_ui(bs, 0, 1);

	/* video_signal_type_present_flag */
	bitstream_put_ui(bs, 0, 1);
	/* chroma_loc_info_present_flag */
	bitstream_put_ui(bs, 0, 1);

	/* timing_info_present_flag */
	bitstream_put_ui(bs, 1, 1);
	bitstream_put_ui(bs, seq->num_units_in_tick, 32);
	bitstream_put_ui(bs, seq->time_scale, 32);
	/* fixed_frame_rate_flag */
	bitstream_put_ui(bs, 1, 1);

	/* nal_hrd_parameters_present_flag */
	bitstream_put_ui(bs, 0, 1);

	/* vcl_hrd_parameters_present_flag */
	bitstream_put_ui(bs, 0, 1);

	/* low_delay_hrd_flag */
	bitstream_put_ui(bs, 0, 1);

	/* pic_struct_present_flag */
	bitstream_put_ui(bs, 0, 1);
	/* bitstream_restriction_flag */
	bitstream_put_ui(bs, 0, 1);

	rbsp_trailing_bits(bs);
}

static void pps_rbsp(struct bitstream *bs,
		     VAEncPictureParameterBufferH264 *pic)
{
	/* pic_parameter_set_id, seq_parameter_set_id */
	bitstream_put_ue(bs, pic->pic_parameter_set_id);
	bitstream_put_ue(bs, pic->seq_parameter_set_id);

	bitstream_put_ui(bs, pic->pic_fields.bits.entropy_coding_mode_flag, 1);

	/* pic_order_present_flag: 0 */
	bitstream_put_ui(bs, 0, 1);

	/* num_slice_groups_minus1 */
	bitstream_put_ue(bs, 0);

	bitstream_put_ue(bs, pic->num_ref_idx_l0_active_minus1);
	bitstream_put_ue(bs, pic->num_ref_idx_l1_active_minus1);

	bitstream_put_ui(bs, pic->pic_fields.bits.weighted_pred_flag, 1);
	bitstream_put_ui(bs, pic->pic_fields.bits.weighted_bipred_idc, 2);

	/* pic_init_qp_minus26, pic_init_qs_minus26, chroma_qp_index_offset */
	bitstream_put_se(bs, pic->pic_init_qp - 26);
	bitstream_put_se(bs, 0);
	bitstream_put_se(bs, 0);

	bitstream_put_ui(bs, pic->pic_fields.bits.deblocking_filter_control_present_flag, 1);

	/* constrained_intra_pred_flag, redundant_pic_cnt_present_flag */
	bitstream_put_ui(bs, 0, 1);
	bitstream_put_ui(bs, 0, 1);

	bitstream_put_ui(bs, pic->pic_fields.bits.transform_8x8_mode_flag, 1);

	/* pic_scaling_matrix_present_flag */
	bitstream_put_ui(bs, 0, 1);
	bitstream_put_se(bs, pic->second_chroma_qp_index_offset );

	rbsp_trailing_bits(bs);
}

static int
build_packed_pic_buffer(struct vaapi_recorder *r,
			void **header_buffer)
{
	struct bitstream bs;

	bitstream_start(&bs);
	nal_start_code_prefix(&bs);
	nal_header(&bs, NAL_REF_IDC_HIGH, NAL_PPS);
	pps_rbsp(&bs, &r->encoder.param.pic);
	bitstream_end(&bs);

	*header_buffer = bs.buffer;
	return bs.bit_offset;
}

static int
build_packed_seq_buffer(struct vaapi_recorder *r,
			void **header_buffer)
{
	struct bitstream bs;

	bitstream_start(&bs);
	nal_start_code_prefix(&bs);
	nal_header(&bs, NAL_REF_IDC_HIGH, NAL_SPS);
	sps_rbsp(&bs, &r->encoder.param.seq, r->encoder.constraint_set_flag);
	bitstream_end(&bs);

	*header_buffer = bs.buffer;
	return bs.bit_offset;
}

static int
create_packed_header_buffers(struct vaapi_recorder *r, VABufferID *buffers,
			     VAEncPackedHeaderType type,
			     void *data, int bit_length)
{
	VAEncPackedHeaderParameterBuffer packed_header;
	VAStatus status;

	packed_header.type = type;
	packed_header.bit_length = bit_length;
	packed_header.has_emulation_bytes = 0;

	status = vaCreateBuffer(r->va_dpy, r->encoder.ctx,
				VAEncPackedHeaderParameterBufferType,
				sizeof packed_header, 1, &packed_header,
				&buffers[0]);
	if (status != VA_STATUS_SUCCESS)
		return 0;

	status = vaCreateBuffer(r->va_dpy, r->encoder.ctx,
				VAEncPackedHeaderDataBufferType,
				(bit_length + 7) / 8, 1, data, &buffers[1]);
	if (status != VA_STATUS_SUCCESS) {
		vaDestroyBuffer(r->va_dpy, buffers[0]);
		return 0;
	}

	return 2;
}

static int
encoder_prepare_headers(struct vaapi_recorder *r, VABufferID *buffers)
{
	VABufferID *p;

	int bit_length;
	void *data;

	p = buffers;

	bit_length = build_packed_seq_buffer(r, &data);
	p += create_packed_header_buffers(r, p, VAEncPackedHeaderSequence,
					  data, bit_length);
	free(data);

	bit_length = build_packed_pic_buffer(r, &data);
	p += create_packed_header_buffers(r, p, VAEncPackedHeaderPicture,
					  data, bit_length);
	free(data);

	return p - buffers;
}

static VAStatus
encoder_render_picture(struct vaapi_recorder *r, VASurfaceID input,
		       VABufferID *buffers, int count)
{
	VAStatus status;

	status = vaBeginPicture(r->va_dpy, r->encoder.ctx, input);
	if (status != VA_STATUS_SUCCESS)
		return status;

	status = vaRenderPicture(r->va_dpy, r->encoder.ctx, buffers, count);
	if (status != VA_STATUS_SUCCESS)
		return status;

	status = vaEndPicture(r->va_dpy, r->encoder.ctx);
	if (status != VA_STATUS_SUCCESS)
		return status;

	return vaSyncSurface(r->va_dpy, input);
}

static VABufferID
encoder_create_output_buffer(struct vaapi_recorder *r)
{
	VABufferID output_buf;
	VAStatus status;

	status = vaCreateBuffer(r->va_dpy, r->encoder.ctx,
				VAEncCodedBufferType, r->encoder.output_size,
				1, NULL, &output_buf);
	if (status == VA_STATUS_SUCCESS)
		return output_buf;
	else
		return VA_INVALID_ID;
}

747 748 749 750 751 752 753
enum output_write_status {
	OUTPUT_WRITE_SUCCESS,
	OUTPUT_WRITE_OVERFLOW,
	OUTPUT_WRITE_FATAL
};

static enum output_write_status
754 755 756 757 758 759 760 761
encoder_write_output(struct vaapi_recorder *r, VABufferID output_buf)
{
	VACodedBufferSegment *segment;
	VAStatus status;
	int count;

	status = vaMapBuffer(r->va_dpy, output_buf, (void **) &segment);
	if (status != VA_STATUS_SUCCESS)
762
		return OUTPUT_WRITE_FATAL;
763 764 765 766

	if (segment->status & VA_CODED_BUF_STATUS_SLICE_OVERFLOW_MASK) {
		r->encoder.output_size *= 2;
		vaUnmapBuffer(r->va_dpy, output_buf);
767
		return OUTPUT_WRITE_OVERFLOW;
768 769 770 771 772 773
	}

	count = write(r->output_fd, segment->buf, segment->size);

	vaUnmapBuffer(r->va_dpy, output_buf);

774 775 776 777
	if (count < 0)
		return OUTPUT_WRITE_FATAL;

	return OUTPUT_WRITE_SUCCESS;
778 779 780 781 782 783 784 785 786
}

static void
encoder_encode(struct vaapi_recorder *r, VASurfaceID input)
{
	VABufferID output_buf = VA_INVALID_ID;

	VABufferID buffers[8];
	int count = 0;
787 788
	int i, slice_type;
	enum output_write_status ret;
789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822

	if ((r->frame_count % r->encoder.intra_period) == 0)
		slice_type = SLICE_TYPE_I;
	else
		slice_type = SLICE_TYPE_P;

	buffers[count++] = encoder_update_seq_parameters(r);
	buffers[count++] = encoder_update_misc_hdr_parameter(r);
	buffers[count++] = encoder_update_slice_parameter(r, slice_type);

	for (i = 0; i < count; i++)
		if (buffers[i] == VA_INVALID_ID)
			goto bail;

	if (r->frame_count == 0)
		count += encoder_prepare_headers(r, buffers + count);

	do {
		output_buf = encoder_create_output_buffer(r);
		if (output_buf == VA_INVALID_ID)
			goto bail;

		buffers[count++] =
			encoder_update_pic_parameters(r, output_buf);
		if (buffers[count - 1] == VA_INVALID_ID)
			goto bail;

		encoder_render_picture(r, input, buffers, count);
		ret = encoder_write_output(r, output_buf);

		vaDestroyBuffer(r->va_dpy, output_buf);
		output_buf = VA_INVALID_ID;

		vaDestroyBuffer(r->va_dpy, buffers[--count]);
823 824 825 826
	} while (ret == OUTPUT_WRITE_OVERFLOW);

	if (ret == OUTPUT_WRITE_FATAL)
		r->error = errno;
827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899

	for (i = 0; i < count; i++)
		vaDestroyBuffer(r->va_dpy, buffers[i]);

	r->frame_count++;
	return;

bail:
	for (i = 0; i < count; i++)
		vaDestroyBuffer(r->va_dpy, buffers[i]);
	if (output_buf != VA_INVALID_ID)
		vaDestroyBuffer(r->va_dpy, output_buf);
}


static int
setup_vpp(struct vaapi_recorder *r)
{
	VAStatus status;

	status = vaCreateConfig(r->va_dpy, VAProfileNone,
				VAEntrypointVideoProc, NULL, 0,
				&r->vpp.cfg);
	if (status != VA_STATUS_SUCCESS) {
		weston_log("vaapi: failed to create VPP config\n");
		return -1;
	}

	status = vaCreateContext(r->va_dpy, r->vpp.cfg, r->width, r->height,
				 0, NULL, 0, &r->vpp.ctx);
	if (status != VA_STATUS_SUCCESS) {
		weston_log("vaapi: failed to create VPP context\n");
		goto err_cfg;
	}

	status = vaCreateBuffer(r->va_dpy, r->vpp.ctx,
				VAProcPipelineParameterBufferType,
				sizeof(VAProcPipelineParameterBuffer),
				1, NULL, &r->vpp.pipeline_buf);
	if (status != VA_STATUS_SUCCESS) {
		weston_log("vaapi: failed to create VPP pipeline buffer\n");
		goto err_ctx;
	}

	status = vaCreateSurfaces(r->va_dpy, VA_RT_FORMAT_YUV420,
				  r->width, r->height, &r->vpp.output, 1,
				  NULL, 0);
	if (status != VA_STATUS_SUCCESS) {
		weston_log("vaapi: failed to create YUV surface\n");
		goto err_buf;
	}

	return 0;

err_buf:
	vaDestroyBuffer(r->va_dpy, r->vpp.pipeline_buf);
err_ctx:
	vaDestroyConfig(r->va_dpy, r->vpp.ctx);
err_cfg:
	vaDestroyConfig(r->va_dpy, r->vpp.cfg);

	return -1;
}

static void
vpp_destroy(struct vaapi_recorder *r)
{
	vaDestroySurfaces(r->va_dpy, &r->vpp.output, 1);
	vaDestroyBuffer(r->va_dpy, r->vpp.pipeline_buf);
	vaDestroyConfig(r->va_dpy, r->vpp.ctx);
	vaDestroyConfig(r->va_dpy, r->vpp.cfg);
}

900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926
static int
setup_worker_thread(struct vaapi_recorder *r)
{
	pthread_mutex_init(&r->mutex, NULL);
	pthread_cond_init(&r->input_cond, NULL);
	pthread_create(&r->worker_thread, NULL, worker_thread_function, r);

	return 1;
}

static void
destroy_worker_thread(struct vaapi_recorder *r)
{
	pthread_mutex_lock(&r->mutex);

	/* Make sure the worker thread finishes */
	r->destroying = 1;
	pthread_cond_signal(&r->input_cond);

	pthread_mutex_unlock(&r->mutex);

	pthread_join(r->worker_thread, NULL);

	pthread_mutex_destroy(&r->mutex);
	pthread_cond_destroy(&r->input_cond);
}

927 928 929 930 931 932 933 934
struct vaapi_recorder *
vaapi_recorder_create(int drm_fd, int width, int height, const char *filename)
{
	struct vaapi_recorder *r;
	VAStatus status;
	int major, minor;
	int flags;

935 936
	r = zalloc(sizeof *r);
	if (r == NULL)
937 938 939 940
		return NULL;

	r->width = width;
	r->height = height;
941
	r->drm_fd = drm_fd;
942

943
	if (setup_worker_thread(r) < 0)
944 945
		goto err_free;

946 947
	flags = O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC;
	r->output_fd = open(filename, flags, 0644);
948 949 950
	if (r->output_fd < 0)
		goto err_thread;

951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979
	r->va_dpy = vaGetDisplayDRM(drm_fd);
	if (!r->va_dpy) {
		weston_log("failed to create VA display\n");
		goto err_fd;
	}

	status = vaInitialize(r->va_dpy, &major, &minor);
	if (status != VA_STATUS_SUCCESS) {
		weston_log("vaapi: failed to initialize display\n");
		goto err_fd;
	}

	if (setup_vpp(r) < 0) {
		weston_log("vaapi: failed to initialize VPP pipeline\n");
		goto err_va_dpy;
	}

	if (setup_encoder(r) < 0) {
		goto err_vpp;
	}

	return r;

err_vpp:
	vpp_destroy(r);
err_va_dpy:
	vaTerminate(r->va_dpy);
err_fd:
	close(r->output_fd);
980 981
err_thread:
	destroy_worker_thread(r);
982 983 984 985 986 987 988 989 990
err_free:
	free(r);

	return NULL;
}

void
vaapi_recorder_destroy(struct vaapi_recorder *r)
{
991 992
	destroy_worker_thread(r);

993 994 995 996 997 998
	encoder_destroy(r);
	vpp_destroy(r);

	vaTerminate(r->va_dpy);

	close(r->output_fd);
999
	close(r->drm_fd);
1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081

	free(r);
}

static VAStatus
create_surface_from_fd(struct vaapi_recorder *r, int prime_fd,
		       int stride, VASurfaceID *surface)
{
	VASurfaceAttrib va_attribs[2];
	VASurfaceAttribExternalBuffers va_attrib_extbuf;
	VAStatus status;

	unsigned long buffer_fd = prime_fd;

	va_attrib_extbuf.pixel_format = VA_FOURCC_BGRX;
	va_attrib_extbuf.width = r->width;
	va_attrib_extbuf.height = r->height;
	va_attrib_extbuf.data_size = r->height * stride;
	va_attrib_extbuf.num_planes = 1;
	va_attrib_extbuf.pitches[0] = stride;
	va_attrib_extbuf.offsets[0] = 0;
	va_attrib_extbuf.buffers = &buffer_fd;
	va_attrib_extbuf.num_buffers = 1;
	va_attrib_extbuf.flags = 0;
	va_attrib_extbuf.private_data = NULL;

	va_attribs[0].type = VASurfaceAttribMemoryType;
	va_attribs[0].flags = VA_SURFACE_ATTRIB_SETTABLE;
	va_attribs[0].value.type = VAGenericValueTypeInteger;
	va_attribs[0].value.value.i = VA_SURFACE_ATTRIB_MEM_TYPE_DRM_PRIME;

	va_attribs[1].type = VASurfaceAttribExternalBufferDescriptor;
	va_attribs[1].flags = VA_SURFACE_ATTRIB_SETTABLE;
	va_attribs[1].value.type = VAGenericValueTypePointer;
	va_attribs[1].value.value.p = &va_attrib_extbuf;

	status = vaCreateSurfaces(r->va_dpy, VA_RT_FORMAT_RGB32,
				  r->width, r->height, surface, 1,
				  va_attribs, 2);

	return status;
}

static VAStatus
convert_rgb_to_yuv(struct vaapi_recorder *r, VASurfaceID rgb_surface)
{
	VAProcPipelineParameterBuffer *pipeline_param;
	VAStatus status;

	status = vaMapBuffer(r->va_dpy, r->vpp.pipeline_buf,
			     (void **) &pipeline_param);
	if (status != VA_STATUS_SUCCESS)
		return status;

	memset(pipeline_param, 0, sizeof *pipeline_param);

	pipeline_param->surface = rgb_surface;
	pipeline_param->surface_color_standard  = VAProcColorStandardNone;

	pipeline_param->output_background_color = 0xff000000;
	pipeline_param->output_color_standard   = VAProcColorStandardNone;

	status = vaUnmapBuffer(r->va_dpy, r->vpp.pipeline_buf);
	if (status != VA_STATUS_SUCCESS)
		return status;

	status = vaBeginPicture(r->va_dpy, r->vpp.ctx, r->vpp.output);
	if (status != VA_STATUS_SUCCESS)
		return status;

	status = vaRenderPicture(r->va_dpy, r->vpp.ctx,
				 &r->vpp.pipeline_buf, 1);
	if (status != VA_STATUS_SUCCESS)
		return status;

	status = vaEndPicture(r->va_dpy, r->vpp.ctx);
	if (status != VA_STATUS_SUCCESS)
		return status;

	return status;
}

1082 1083
static void
recorder_frame(struct vaapi_recorder *r)
1084 1085 1086 1087
{
	VASurfaceID rgb_surface;
	VAStatus status;

1088 1089
	status = create_surface_from_fd(r, r->input.prime_fd,
					r->input.stride, &rgb_surface);
1090 1091 1092 1093 1094 1095
	if (status != VA_STATUS_SUCCESS) {
		weston_log("[libva recorder] "
			   "failed to create surface from bo\n");
		return;
	}

1096 1097
	close(r->input.prime_fd);

1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109
	status = convert_rgb_to_yuv(r, rgb_surface);
	if (status != VA_STATUS_SUCCESS) {
		weston_log("[libva recorder] "
			   "color space conversion failed\n");
		return;
	}

	encoder_encode(r, r->vpp.output);

	vaDestroySurfaces(r->va_dpy, &rgb_surface, 1);
}

1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134
static void *
worker_thread_function(void *data)
{
	struct vaapi_recorder *r = data;

	pthread_mutex_lock(&r->mutex);

	while (!r->destroying) {
		if (!r->input.valid)
			pthread_cond_wait(&r->input_cond, &r->mutex);

		/* If the thread is awaken by destroy_worker_thread(),
		 * there might not be valid input */
		if (!r->input.valid)
			continue;

		recorder_frame(r);
		r->input.valid = 0;
	}

	pthread_mutex_unlock(&r->mutex);

	return NULL;
}

1135
int
1136 1137
vaapi_recorder_frame(struct vaapi_recorder *r, int prime_fd, int stride)
{
1138 1139
	int ret = 0;

1140 1141
	pthread_mutex_lock(&r->mutex);

1142 1143 1144 1145 1146 1147
	if (r->error) {
		errno = r->error;
		ret = -1;
		goto unlock;
	}

1148 1149 1150
	/* The mutex is never released while encoding, so this point should
	 * never be reached if input.valid is true. */
	assert(!r->input.valid);
1151

1152 1153 1154 1155 1156
	r->input.prime_fd = prime_fd;
	r->input.stride = stride;
	r->input.valid = 1;
	pthread_cond_signal(&r->input_cond);

1157
unlock:
1158
	pthread_mutex_unlock(&r->mutex);
1159 1160

	return ret;
1161
}