/*
* HEVC HW decode acceleration through NVDEC
*
* Copyright (c) 2017 Anton Khirnov
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <string.h>
#include "avcodec.h"
#include "nvdec.h"
#include "decode.h"
#include "internal.h"
#include "hevcdec.h"
#include "hevc_data.h"
static void dpb_add(CUVIDHEVCPICPARAMS *pp, int idx, const HEVCFrame *src)
{
FrameDecodeData *fdd = (FrameDecodeData*)src->frame->private_ref->data;
const NVDECFrame *cf = fdd->hwaccel_priv;
pp->RefPicIdx[idx] = cf ? cf->idx : -1;
pp->PicOrderCntVal[idx] = src->poc;
pp->IsLongTerm[idx] = !!(src->flags & HEVC_FRAME_FLAG_LONG_REF);
}
static void fill_scaling_lists(CUVIDHEVCPICPARAMS *ppc, const HEVCContext *s)
{
const ScalingList *sl = s->ps.pps->scaling_list_data_present_flag ?
&s->ps.pps->scaling_list : &s->ps.sps->scaling_list;
int i, j, pos;
for (i = 0; i < 6; i++) {
for (j = 0; j < 16; j++) {
pos = 4 * ff_hevc_diag_scan4x4_y[j] + ff_hevc_diag_scan4x4_x[j];
ppc->ScalingList4x4[i][j] = sl->sl[0][i][pos];
}
for (j = 0; j < 64; j++) {
pos = 8 * ff_hevc_diag_scan8x8_y[j] + ff_hevc_diag_scan8x8_x[j];
ppc->ScalingList8x8[i][j] = sl->sl[1][i][pos];
ppc->ScalingList16x16[i][j] = sl->sl[2][i][pos];
if (i < 2)
ppc->ScalingList32x32[i][j] = sl->sl[3][i * 3][pos];
}
ppc->ScalingListDCCoeff16x16[i] = sl->sl_dc[0][i];
if (i < 2)
ppc->ScalingListDCCoeff32x32[i] = sl->sl_dc[1][i * 3];
}
}
static int nvdec_hevc_start_frame(AVCodecContext *avctx,
const uint8_t *buffer, uint32_t size)
{
const HEVCContext *s = avctx->priv_data;
const HEVCPPS *pps = s->ps.pps;
const HEVCSPS *sps = s->ps.sps;
NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
CUVIDPICPARAMS *pp = &ctx->pic_params;
CUVIDHEVCPICPARAMS *ppc = &pp->CodecSpecific.hevc;
FrameDecodeData *fdd;
NVDECFrame *cf;
int i, j, dpb_size, ret;
ret = ff_nvdec_start_frame(avctx, s->ref->frame);
if (ret < 0)
return ret;
fdd = (FrameDecodeData*)s->ref->frame->private_ref->data;
cf = (NVDECFrame*)fdd->hwaccel_priv;
*pp = (CUVIDPICPARAMS) {
.PicWidthInMbs = sps->width / 16,
.FrameHeightInMbs = sps->height / 16,
.CurrPicIdx = cf->idx,
.ref_pic_flag = 1,
.intra_pic_flag = IS_IRAP(s),
.CodecSpecific.hevc = {
.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,
.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,
.pcm_enabled_flag = sps->pcm_enabled_flag,
.log2_min_pcm_luma_coding_block_size_minus3 = sps->pcm_enabled_flag ? sps->pcm.log2_min_pcm_cb_size - 3 : 0,
.log2_diff_max_min_pcm_luma_coding_block_size = sps->pcm.log2_max_pcm_cb_size - sps->pcm.log2_min_pcm_cb_size,
.pcm_sample_bit_depth_luma_minus1 = sps->pcm_enabled_flag ? sps->pcm.bit_depth - 1 : 0,
.pcm_sample_bit_depth_chroma_minus1 = sps->pcm_enabled_flag ? sps->pcm.bit_depth_chroma - 1 : 0,
#if NVDECAPI_CHECK_VERSION(8, 1)
.log2_max_transform_skip_block_size_minus2 = pps->log2_max_transform_skip_block_size - 2,
.log2_sao_offset_scale_luma = pps->log2_sao_offset_scale_luma,
.log2_sao_offset_scale_chroma = pps->log2_sao_offset_scale_chroma,
.high_precision_offsets_enabled_flag = sps->high_precision_offsets_enabled_flag,
#endif
.pcm_loop_filter_disabled_flag = sps->pcm.loop_filter_disable_flag,
.strong_intra_smoothing_enabled_flag = sps->sps_strong_intra_smoothing_enable_flag,
.max_transform_hierarchy_depth_intra = sps->max_transform_hierarchy_depth_intra,
.max_transform_hierarchy_depth_inter = sps->max_transform_hierarchy_depth_inter,
.amp_enabled_flag = sps->amp_enabled_flag,
.separate_colour_plane_flag = sps->separate_colour_plane_flag,
.log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_poc_lsb - 4,
.num_short_term_ref_pic_sets = sps->nb_st_rps,
.long_term_ref_pics_present_flag = sps->long_term_ref_pics_present_flag,
.num_long_term_ref_pics_sps = sps->num_long_term_ref_pics_sps,
.sps_temporal_mvp_enabled_flag = sps->sps_temporal_mvp_enabled_flag,
.sample_adaptive_offset_enabled_flag = sps->sao_enabled,
.scaling_list_enable_flag = sps->scaling_list_enable_flag,
.IrapPicFlag = IS_IRAP(s),
.IdrPicFlag = IS_IDR(s),
.bit_depth_luma_minus8 = sps->bit_depth - 8,
.bit_depth_chroma_minus8 = sps->bit_depth - 8,
.dependent_slice_segments_enabled_flag = pps->dependent_slice_segments_enabled_flag,
.slice_segment_header_extension_present_flag = pps->slice_header_extension_present_flag,
.sign_data_hiding_enabled_flag = pps->sign_data_hiding_flag,
.cu_qp_delta_enabled_flag = pps->cu_qp_delta_enabled_flag,
.diff_cu_qp_delta_depth = pps->diff_cu_qp_delta_depth,
.init_qp_minus26 = pps->pic_init_qp_minus26,
.pps_cb_qp_offset = pps->cb_qp_offset,
.pps_cr_qp_offset = pps->cr_qp_offset,
.constrained_intra_pred_flag = pps->constrained_intra_pred_flag,
.weighted_pred_flag = pps->weighted_pred_flag,
.weighted_bipred_flag = pps->weighted_bipred_flag,
.transform_skip_enabled_flag = pps->transform_skip_enabled_flag,
.transquant_bypass_enabled_flag = pps->transquant_bypass_enable_flag,
.entropy_coding_sync_enabled_flag = pps->entropy_coding_sync_enabled_flag,
.log2_parallel_merge_level_minus2 = pps->log2_parallel_merge_level - 2,
.num_extra_slice_header_bits = pps->num_extra_slice_header_bits,
.loop_filter_across_tiles_enabled_flag = pps->loop_filter_across_tiles_enabled_flag,
.loop_filter_across_slices_enabled_flag = pps->seq_loop_filter_across_slices_enabled_flag,
.output_flag_present_flag = pps->output_flag_present_flag,
.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,
.lists_modification_present_flag = pps->lists_modification_present_flag,
.cabac_init_present_flag = pps->cabac_init_present_flag,
.pps_slice_chroma_qp_offsets_present_flag = pps->pic_slice_level_chroma_qp_offsets_present_flag,
.deblocking_filter_override_enabled_flag = pps->deblocking_filter_override_enabled_flag,
.pps_deblocking_filter_disabled_flag = pps->disable_dbf,
.pps_beta_offset_div2 = pps->beta_offset / 2,
.pps_tc_offset_div2 = pps->tc_offset / 2,
.tiles_enabled_flag = pps->tiles_enabled_flag,
.uniform_spacing_flag = pps->uniform_spacing_flag,
.num_tile_columns_minus1 = pps->num_tile_columns - 1,
.num_tile_rows_minus1 = pps->num_tile_rows - 1,
.NumBitsForShortTermRPSInSlice = s->sh.short_term_rps ? s->sh.short_term_ref_pic_set_size : 0,
.NumDeltaPocsOfRefRpsIdx = s->sh.short_term_rps ? s->sh.short_term_rps->rps_idx_num_delta_pocs : 0,
.NumPocTotalCurr = ff_hevc_frame_nb_refs(s),
.NumPocStCurrBefore = s->rps[ST_CURR_BEF].nb_refs,
.NumPocStCurrAfter = s->rps[ST_CURR_AFT].nb_refs,
.NumPocLtCurr = s->rps[LT_CURR].nb_refs,
.CurrPicOrderCntVal = s->ref->poc,
},
};
if (pps->num_tile_columns > FF_ARRAY_ELEMS(ppc->column_width_minus1) ||
pps->num_tile_rows > FF_ARRAY_ELEMS(ppc->row_height_minus1)) {
av_log(avctx, AV_LOG_ERROR, "Too many tiles\n");
return AVERROR(ENOSYS);
}
for (i = 0; i < pps->num_tile_columns; i++)
ppc->column_width_minus1[i] = pps->column_width[i] - 1;
for (i = 0; i < pps->num_tile_rows; i++)
ppc->row_height_minus1[i] = pps->row_height[i] - 1;
if (s->rps[LT_CURR].nb_refs > FF_ARRAY_ELEMS(ppc->RefPicSetLtCurr) ||
s->rps[ST_CURR_BEF].nb_refs > FF_ARRAY_ELEMS(ppc->RefPicSetStCurrBefore) ||
s->rps[ST_CURR_AFT].nb_refs > FF_ARRAY_ELEMS(ppc->RefPicSetStCurrAfter)) {
av_log(avctx, AV_LOG_ERROR, "Too many reference frames\n");
return AVERROR(ENOSYS);
}
dpb_size = 0;
for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
const HEVCFrame *ref = &s->DPB[i];
if (!(ref->flags & (HEVC_FRAME_FLAG_SHORT_REF | HEVC_FRAME_FLAG_LONG_REF)))
continue;
if (dpb_size >= FF_ARRAY_ELEMS(ppc->RefPicIdx)) {
av_log(avctx, AV_LOG_ERROR, "Too many reference frames\n");
return AVERROR_INVALIDDATA;
}
dpb_add(ppc, dpb_size++, ref);
}
for (i = dpb_size; i < FF_ARRAY_ELEMS(ppc->RefPicIdx); i++)
ppc->RefPicIdx[i] = -1;
for (i = 0; i < s->rps[ST_CURR_BEF].nb_refs; i++) {
for (j = 0; j < dpb_size; j++) {
if (ppc->PicOrderCntVal[j] == s->rps[ST_CURR_BEF].list[i]) {
ppc->RefPicSetStCurrBefore[i] = j;
break;
}
}
}
for (i = 0; i < s->rps[ST_CURR_AFT].nb_refs; i++) {
for (j = 0; j < dpb_size; j++) {
if (ppc->PicOrderCntVal[j] == s->rps[ST_CURR_AFT].list[i]) {
ppc->RefPicSetStCurrAfter[i] = j;
break;
}
}
}
for (i = 0; i < s->rps[LT_CURR].nb_refs; i++) {
for (j = 0; j < dpb_size; j++) {
if (ppc->PicOrderCntVal[j] == s->rps[LT_CURR].list[i]) {
ppc->RefPicSetLtCurr[i] = j;
break;
}
}
}
fill_scaling_lists(ppc, s);
return 0;
}
static int nvdec_hevc_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
uint32_t size)
{
NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
void *tmp;
tmp = av_fast_realloc(ctx->bitstream, &ctx->bitstream_allocated,
ctx->bitstream_len + size + 3);
if (!tmp)
return AVERROR(ENOMEM);
ctx->bitstream = tmp;
tmp = av_fast_realloc(ctx->slice_offsets, &ctx->slice_offsets_allocated,
(ctx->nb_slices + 1) * sizeof(*ctx->slice_offsets));
if (!tmp)
return AVERROR(ENOMEM);
ctx->slice_offsets = tmp;
AV_WB24(ctx->bitstream + ctx->bitstream_len, 1);
memcpy(ctx->bitstream + ctx->bitstream_len + 3, buffer, size);
ctx->slice_offsets[ctx->nb_slices] = ctx->bitstream_len ;
ctx->bitstream_len += size + 3;
ctx->nb_slices++;
return 0;
}
static int nvdec_hevc_frame_params(AVCodecContext *avctx,
AVBufferRef *hw_frames_ctx)
{
const HEVCContext *s = avctx->priv_data;
const HEVCSPS *sps = s->ps.sps;
return ff_nvdec_frame_params(avctx, hw_frames_ctx, sps->temporal_layer[sps->max_sub_layers - 1].max_dec_pic_buffering + 1);
}
const AVHWAccel ff_hevc_nvdec_hwaccel = {
.name = "hevc_nvdec",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HEVC,
.pix_fmt = AV_PIX_FMT_CUDA,
.start_frame = nvdec_hevc_start_frame,
.end_frame = ff_nvdec_end_frame,
.decode_slice = nvdec_hevc_decode_slice,
.frame_params = nvdec_hevc_frame_params,
.init = ff_nvdec_decode_init,
.uninit = ff_nvdec_decode_uninit,
.priv_data_size = sizeof(NVDECContext),
};