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FFmpeg/libavcodec/vaapi_hevc.c

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/*
* HEVC HW decode acceleration through VA API
*
* Copyright (C) 2015 Timo Rothenpieler <timo@rothenpieler.org>
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <va/va.h>
#include <va/va_dec_hevc.h>
#include "avcodec.h"
#include "hevcdec.h"
#include "hwaccel.h"
#include "vaapi_decode.h"
typedef struct VAAPIDecodePictureHEVC {
VAPictureParameterBufferHEVC pic_param;
VASliceParameterBufferHEVC last_slice_param;
const uint8_t *last_buffer;
size_t last_size;
VAAPIDecodePicture pic;
} VAAPIDecodePictureHEVC;
static void init_vaapi_pic(VAPictureHEVC *va_pic)
{
va_pic->picture_id = VA_INVALID_ID;
va_pic->flags = VA_PICTURE_HEVC_INVALID;
va_pic->pic_order_cnt = 0;
}
static void fill_vaapi_pic(VAPictureHEVC *va_pic, const HEVCFrame *pic, int rps_type)
{
va_pic->picture_id = ff_vaapi_get_surface_id(pic->frame);
va_pic->pic_order_cnt = pic->poc;
va_pic->flags = rps_type;
if (pic->flags & HEVC_FRAME_FLAG_LONG_REF)
va_pic->flags |= VA_PICTURE_HEVC_LONG_TERM_REFERENCE;
if (pic->frame->interlaced_frame) {
va_pic->flags |= VA_PICTURE_HEVC_FIELD_PIC;
if (!pic->frame->top_field_first)
va_pic->flags |= VA_PICTURE_HEVC_BOTTOM_FIELD;
}
}
static int find_frame_rps_type(const HEVCContext *h, const HEVCFrame *pic)
{
VASurfaceID pic_surf = ff_vaapi_get_surface_id(pic->frame);
int i;
for (i = 0; i < h->rps[ST_CURR_BEF].nb_refs; i++) {
if (pic_surf == ff_vaapi_get_surface_id(h->rps[ST_CURR_BEF].ref[i]->frame))
return VA_PICTURE_HEVC_RPS_ST_CURR_BEFORE;
}
for (i = 0; i < h->rps[ST_CURR_AFT].nb_refs; i++) {
if (pic_surf == ff_vaapi_get_surface_id(h->rps[ST_CURR_AFT].ref[i]->frame))
return VA_PICTURE_HEVC_RPS_ST_CURR_AFTER;
}
for (i = 0; i < h->rps[LT_CURR].nb_refs; i++) {
if (pic_surf == ff_vaapi_get_surface_id(h->rps[LT_CURR].ref[i]->frame))
return VA_PICTURE_HEVC_RPS_LT_CURR;
}
return 0;
}
static void fill_vaapi_reference_frames(const HEVCContext *h, VAPictureParameterBufferHEVC *pp)
{
const HEVCFrame *current_picture = h->ref;
int i, j, rps_type;
for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->ReferenceFrames); i++) {
const HEVCFrame *frame = NULL;
while (!frame && j < FF_ARRAY_ELEMS(h->DPB)) {
if (&h->DPB[j] != current_picture && (h->DPB[j].flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF)))
frame = &h->DPB[j];
j++;
}
init_vaapi_pic(&pp->ReferenceFrames[i]);
if (frame) {
rps_type = find_frame_rps_type(h, frame);
fill_vaapi_pic(&pp->ReferenceFrames[i], frame, rps_type);
}
}
}
static int vaapi_hevc_start_frame(AVCodecContext *avctx,
av_unused const uint8_t *buffer,
av_unused uint32_t size)
{
const HEVCContext *h = avctx->priv_data;
VAAPIDecodePictureHEVC *pic = h->ref->hwaccel_picture_private;
const HEVCSPS *sps = h->ps.sps;
const HEVCPPS *pps = h->ps.pps;
const ScalingList *scaling_list = NULL;
int err, i;
pic->pic.output_surface = ff_vaapi_get_surface_id(h->ref->frame);
pic->pic_param = (VAPictureParameterBufferHEVC) {
.pic_fields.value = 0,
.slice_parsing_fields.value = 0,
.pic_width_in_luma_samples = sps->width,
.pic_height_in_luma_samples = sps->height,
.log2_min_luma_coding_block_size_minus3 = sps->log2_min_cb_size - 3,
.sps_max_dec_pic_buffering_minus1 = sps->temporal_layer[sps->max_sub_layers - 1].max_dec_pic_buffering - 1,
.log2_diff_max_min_luma_coding_block_size = sps->log2_diff_max_min_coding_block_size,
.log2_min_transform_block_size_minus2 = sps->log2_min_tb_size - 2,
.log2_diff_max_min_transform_block_size = sps->log2_max_trafo_size - sps->log2_min_tb_size,
.max_transform_hierarchy_depth_inter = sps->max_transform_hierarchy_depth_inter,
.max_transform_hierarchy_depth_intra = sps->max_transform_hierarchy_depth_intra,
.num_short_term_ref_pic_sets = sps->nb_st_rps,
.num_long_term_ref_pic_sps = sps->num_long_term_ref_pics_sps,
.num_ref_idx_l0_default_active_minus1 = pps->num_ref_idx_l0_default_active - 1,
.num_ref_idx_l1_default_active_minus1 = pps->num_ref_idx_l1_default_active - 1,
.init_qp_minus26 = pps->pic_init_qp_minus26,
.pps_cb_qp_offset = pps->cb_qp_offset,
.pps_cr_qp_offset = pps->cr_qp_offset,
.pcm_sample_bit_depth_luma_minus1 = sps->pcm.bit_depth - 1,
.pcm_sample_bit_depth_chroma_minus1 = sps->pcm.bit_depth_chroma - 1,
.log2_min_pcm_luma_coding_block_size_minus3 = sps->pcm.log2_min_pcm_cb_size - 3,
.log2_diff_max_min_pcm_luma_coding_block_size = sps->pcm.log2_max_pcm_cb_size - sps->pcm.log2_min_pcm_cb_size,
.diff_cu_qp_delta_depth = pps->diff_cu_qp_delta_depth,
.pps_beta_offset_div2 = pps->beta_offset / 2,
.pps_tc_offset_div2 = pps->tc_offset / 2,
.log2_parallel_merge_level_minus2 = pps->log2_parallel_merge_level - 2,
.bit_depth_luma_minus8 = sps->bit_depth - 8,
.bit_depth_chroma_minus8 = sps->bit_depth - 8,
.log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_poc_lsb - 4,
.num_extra_slice_header_bits = pps->num_extra_slice_header_bits,
.pic_fields.bits = {
.chroma_format_idc = sps->chroma_format_idc,
.tiles_enabled_flag = pps->tiles_enabled_flag,
.separate_colour_plane_flag = sps->separate_colour_plane_flag,
.pcm_enabled_flag = sps->pcm_enabled_flag,
.scaling_list_enabled_flag = sps->scaling_list_enable_flag,
.transform_skip_enabled_flag = pps->transform_skip_enabled_flag,
.amp_enabled_flag = sps->amp_enabled_flag,
.strong_intra_smoothing_enabled_flag = sps->sps_strong_intra_smoothing_enable_flag,
.sign_data_hiding_enabled_flag = pps->sign_data_hiding_flag,
.constrained_intra_pred_flag = pps->constrained_intra_pred_flag,
.cu_qp_delta_enabled_flag = pps->cu_qp_delta_enabled_flag,
.weighted_pred_flag = pps->weighted_pred_flag,
.weighted_bipred_flag = pps->weighted_bipred_flag,
.transquant_bypass_enabled_flag = pps->transquant_bypass_enable_flag,
.entropy_coding_sync_enabled_flag = pps->entropy_coding_sync_enabled_flag,
.pps_loop_filter_across_slices_enabled_flag = pps->seq_loop_filter_across_slices_enabled_flag,
.loop_filter_across_tiles_enabled_flag = pps->loop_filter_across_tiles_enabled_flag,
.pcm_loop_filter_disabled_flag = sps->pcm.loop_filter_disable_flag,
},
.slice_parsing_fields.bits = {
.lists_modification_present_flag = pps->lists_modification_present_flag,
.long_term_ref_pics_present_flag = sps->long_term_ref_pics_present_flag,
.sps_temporal_mvp_enabled_flag = sps->sps_temporal_mvp_enabled_flag,
.cabac_init_present_flag = pps->cabac_init_present_flag,
.output_flag_present_flag = pps->output_flag_present_flag,
.dependent_slice_segments_enabled_flag = pps->dependent_slice_segments_enabled_flag,
.pps_slice_chroma_qp_offsets_present_flag = pps->pic_slice_level_chroma_qp_offsets_present_flag,
.sample_adaptive_offset_enabled_flag = sps->sao_enabled,
.deblocking_filter_override_enabled_flag = pps->deblocking_filter_override_enabled_flag,
.pps_disable_deblocking_filter_flag = pps->disable_dbf,
.slice_segment_header_extension_present_flag = pps->slice_header_extension_present_flag,
.RapPicFlag = IS_IRAP(h),
.IdrPicFlag = IS_IDR(h),
.IntraPicFlag = IS_IRAP(h),
},
};
fill_vaapi_pic(&pic->pic_param.CurrPic, h->ref, 0);
fill_vaapi_reference_frames(h, &pic->pic_param);
if (pps->tiles_enabled_flag) {
pic->pic_param.num_tile_columns_minus1 = pps->num_tile_columns - 1;
pic->pic_param.num_tile_rows_minus1 = pps->num_tile_rows - 1;
for (i = 0; i < pps->num_tile_columns; i++)
pic->pic_param.column_width_minus1[i] = pps->column_width[i] - 1;
for (i = 0; i < pps->num_tile_rows; i++)
pic->pic_param.row_height_minus1[i] = pps->row_height[i] - 1;
}
if (h->sh.short_term_ref_pic_set_sps_flag == 0 && h->sh.short_term_rps) {
pic->pic_param.st_rps_bits = h->sh.short_term_ref_pic_set_size;
} else {
pic->pic_param.st_rps_bits = 0;
}
err = ff_vaapi_decode_make_param_buffer(avctx, &pic->pic,
VAPictureParameterBufferType,
&pic->pic_param, sizeof(pic->pic_param));
if (err < 0)
goto fail;
if (pps->scaling_list_data_present_flag)
scaling_list = &pps->scaling_list;
else if (sps->scaling_list_enable_flag)
scaling_list = &sps->scaling_list;
if (scaling_list) {
VAIQMatrixBufferHEVC iq_matrix;
int j;
for (i = 0; i < 6; i++) {
for (j = 0; j < 16; j++)
iq_matrix.ScalingList4x4[i][j] = scaling_list->sl[0][i][j];
for (j = 0; j < 64; j++) {
iq_matrix.ScalingList8x8[i][j] = scaling_list->sl[1][i][j];
iq_matrix.ScalingList16x16[i][j] = scaling_list->sl[2][i][j];
if (i < 2)
iq_matrix.ScalingList32x32[i][j] = scaling_list->sl[3][i][j];
}
iq_matrix.ScalingListDC16x16[i] = scaling_list->sl_dc[0][i];
if (i < 2)
iq_matrix.ScalingListDC32x32[i] = scaling_list->sl_dc[1][i];
}
err = ff_vaapi_decode_make_param_buffer(avctx, &pic->pic,
VAIQMatrixBufferType,
&iq_matrix, sizeof(iq_matrix));
if (err < 0)
goto fail;
}
return 0;
fail:
ff_vaapi_decode_cancel(avctx, &pic->pic);
return err;
}
static int vaapi_hevc_end_frame(AVCodecContext *avctx)
{
const HEVCContext *h = avctx->priv_data;
VAAPIDecodePictureHEVC *pic = h->ref->hwaccel_picture_private;
int ret;
if (pic->last_size) {
pic->last_slice_param.LongSliceFlags.fields.LastSliceOfPic = 1;
ret = ff_vaapi_decode_make_slice_buffer(avctx, &pic->pic,
&pic->last_slice_param, sizeof(pic->last_slice_param),
pic->last_buffer, pic->last_size);
if (ret < 0)
goto fail;
}
ret = ff_vaapi_decode_issue(avctx, &pic->pic);
if (ret < 0)
goto fail;
return 0;
fail:
ff_vaapi_decode_cancel(avctx, &pic->pic);
return ret;
}
static void fill_pred_weight_table(const HEVCContext *h,
const SliceHeader *sh,
VASliceParameterBufferHEVC *slice_param)
{
int i;
memset(slice_param->delta_luma_weight_l0, 0, sizeof(slice_param->delta_luma_weight_l0));
memset(slice_param->delta_luma_weight_l1, 0, sizeof(slice_param->delta_luma_weight_l1));
memset(slice_param->luma_offset_l0, 0, sizeof(slice_param->luma_offset_l0));
memset(slice_param->luma_offset_l1, 0, sizeof(slice_param->luma_offset_l1));
memset(slice_param->delta_chroma_weight_l0, 0, sizeof(slice_param->delta_chroma_weight_l0));
memset(slice_param->delta_chroma_weight_l1, 0, sizeof(slice_param->delta_chroma_weight_l1));
memset(slice_param->ChromaOffsetL0, 0, sizeof(slice_param->ChromaOffsetL0));
memset(slice_param->ChromaOffsetL1, 0, sizeof(slice_param->ChromaOffsetL1));
slice_param->delta_chroma_log2_weight_denom = 0;
slice_param->luma_log2_weight_denom = 0;
if (sh->slice_type == HEVC_SLICE_I ||
(sh->slice_type == HEVC_SLICE_P && !h->ps.pps->weighted_pred_flag) ||
(sh->slice_type == HEVC_SLICE_B && !h->ps.pps->weighted_bipred_flag))
return;
slice_param->luma_log2_weight_denom = sh->luma_log2_weight_denom;
if (h->ps.sps->chroma_format_idc) {
slice_param->delta_chroma_log2_weight_denom = sh->chroma_log2_weight_denom - sh->luma_log2_weight_denom;
}
for (i = 0; i < 15 && i < sh->nb_refs[L0]; i++) {
slice_param->delta_luma_weight_l0[i] = sh->luma_weight_l0[i] - (1 << sh->luma_log2_weight_denom);
slice_param->luma_offset_l0[i] = sh->luma_offset_l0[i];
slice_param->delta_chroma_weight_l0[i][0] = sh->chroma_weight_l0[i][0] - (1 << sh->chroma_log2_weight_denom);
slice_param->delta_chroma_weight_l0[i][1] = sh->chroma_weight_l0[i][1] - (1 << sh->chroma_log2_weight_denom);
slice_param->ChromaOffsetL0[i][0] = sh->chroma_offset_l0[i][0];
slice_param->ChromaOffsetL0[i][1] = sh->chroma_offset_l0[i][1];
}
if (sh->slice_type == HEVC_SLICE_B) {
for (i = 0; i < 15 && i < sh->nb_refs[L1]; i++) {
slice_param->delta_luma_weight_l1[i] = sh->luma_weight_l1[i] - (1 << sh->luma_log2_weight_denom);
slice_param->luma_offset_l1[i] = sh->luma_offset_l1[i];
slice_param->delta_chroma_weight_l1[i][0] = sh->chroma_weight_l1[i][0] - (1 << sh->chroma_log2_weight_denom);
slice_param->delta_chroma_weight_l1[i][1] = sh->chroma_weight_l1[i][1] - (1 << sh->chroma_log2_weight_denom);
slice_param->ChromaOffsetL1[i][0] = sh->chroma_offset_l1[i][0];
slice_param->ChromaOffsetL1[i][1] = sh->chroma_offset_l1[i][1];
}
}
}
static uint8_t get_ref_pic_index(const HEVCContext *h, const HEVCFrame *frame)
{
VAAPIDecodePictureHEVC *pic = h->ref->hwaccel_picture_private;
VAPictureParameterBufferHEVC *pp = &pic->pic_param;
uint8_t i;
if (!frame)
return 0xff;
for (i = 0; i < FF_ARRAY_ELEMS(pp->ReferenceFrames); i++) {
VASurfaceID pid = pp->ReferenceFrames[i].picture_id;
int poc = pp->ReferenceFrames[i].pic_order_cnt;
if (pid != VA_INVALID_ID && pid == ff_vaapi_get_surface_id(frame->frame) && poc == frame->poc)
return i;
}
return 0xff;
}
static int vaapi_hevc_decode_slice(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
const HEVCContext *h = avctx->priv_data;
const SliceHeader *sh = &h->sh;
VAAPIDecodePictureHEVC *pic = h->ref->hwaccel_picture_private;
int nb_list = (sh->slice_type == HEVC_SLICE_B) ?
2 : (sh->slice_type == HEVC_SLICE_I ? 0 : 1);
int err, i, list_idx;
if (!sh->first_slice_in_pic_flag) {
err = ff_vaapi_decode_make_slice_buffer(avctx, &pic->pic,
&pic->last_slice_param, sizeof(pic->last_slice_param),
pic->last_buffer, pic->last_size);
pic->last_buffer = NULL;
pic->last_size = 0;
if (err) {
ff_vaapi_decode_cancel(avctx, &pic->pic);
return err;
}
}
pic->last_slice_param = (VASliceParameterBufferHEVC) {
.slice_data_size = size,
.slice_data_offset = 0,
.slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
/* Add 1 to the bits count here to account for the byte_alignment bit, which
* always is at least one bit and not accounted for otherwise. */
.slice_data_byte_offset = (get_bits_count(&h->HEVClc.gb) + 1 + 7) / 8,
.slice_segment_address = sh->slice_segment_addr,
.slice_qp_delta = sh->slice_qp_delta,
.slice_cb_qp_offset = sh->slice_cb_qp_offset,
.slice_cr_qp_offset = sh->slice_cr_qp_offset,
.slice_beta_offset_div2 = sh->beta_offset / 2,
.slice_tc_offset_div2 = sh->tc_offset / 2,
.collocated_ref_idx = sh->slice_temporal_mvp_enabled_flag ? sh->collocated_ref_idx : 0xFF,
.five_minus_max_num_merge_cand = sh->slice_type == HEVC_SLICE_I ? 0 : 5 - sh->max_num_merge_cand,
.num_ref_idx_l0_active_minus1 = sh->nb_refs[L0] ? sh->nb_refs[L0] - 1 : 0,
.num_ref_idx_l1_active_minus1 = sh->nb_refs[L1] ? sh->nb_refs[L1] - 1 : 0,
.LongSliceFlags.fields = {
.dependent_slice_segment_flag = sh->dependent_slice_segment_flag,
.slice_type = sh->slice_type,
.color_plane_id = sh->colour_plane_id,
.mvd_l1_zero_flag = sh->mvd_l1_zero_flag,
.cabac_init_flag = sh->cabac_init_flag,
.slice_temporal_mvp_enabled_flag = sh->slice_temporal_mvp_enabled_flag,
.slice_deblocking_filter_disabled_flag = sh->disable_deblocking_filter_flag,
.collocated_from_l0_flag = sh->collocated_list == L0 ? 1 : 0,
.slice_loop_filter_across_slices_enabled_flag = sh->slice_loop_filter_across_slices_enabled_flag,
.slice_sao_luma_flag = sh->slice_sample_adaptive_offset_flag[0],
.slice_sao_chroma_flag = sh->slice_sample_adaptive_offset_flag[1],
},
};
memset(pic->last_slice_param.RefPicList, 0xFF, sizeof(pic->last_slice_param.RefPicList));
for (list_idx = 0; list_idx < nb_list; list_idx++) {
RefPicList *rpl = &h->ref->refPicList[list_idx];
for (i = 0; i < rpl->nb_refs; i++)
pic->last_slice_param.RefPicList[list_idx][i] = get_ref_pic_index(h, rpl->ref[i]);
}
fill_pred_weight_table(h, sh, &pic->last_slice_param);
pic->last_buffer = buffer;
pic->last_size = size;
return 0;
}
const AVHWAccel ff_hevc_vaapi_hwaccel = {
.name = "hevc_vaapi",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HEVC,
.pix_fmt = AV_PIX_FMT_VAAPI,
.start_frame = vaapi_hevc_start_frame,
.end_frame = vaapi_hevc_end_frame,
.decode_slice = vaapi_hevc_decode_slice,
.frame_priv_data_size = sizeof(VAAPIDecodePictureHEVC),
.init = ff_vaapi_decode_init,
.uninit = ff_vaapi_decode_uninit,
.frame_params = ff_vaapi_common_frame_params,
.priv_data_size = sizeof(VAAPIDecodeContext),
.caps_internal = HWACCEL_CAP_ASYNC_SAFE,
};