forked from KolibriOS/kolibrios
371 lines
17 KiB
C
371 lines
17 KiB
C
/*
|
|
* H.264 HW decode acceleration through VA API
|
|
*
|
|
* Copyright (C) 2008-2009 Splitted-Desktop Systems
|
|
*
|
|
* 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 "vaapi_internal.h"
|
|
#include "h264.h"
|
|
#include "mpegutils.h"
|
|
|
|
/**
|
|
* @file
|
|
* This file implements the glue code between FFmpeg's and VA API's
|
|
* structures for H.264 decoding.
|
|
*/
|
|
|
|
/**
|
|
* Initialize an empty VA API picture.
|
|
*
|
|
* VA API requires a fixed-size reference picture array.
|
|
*/
|
|
static void init_vaapi_pic(VAPictureH264 *va_pic)
|
|
{
|
|
va_pic->picture_id = VA_INVALID_ID;
|
|
va_pic->flags = VA_PICTURE_H264_INVALID;
|
|
va_pic->TopFieldOrderCnt = 0;
|
|
va_pic->BottomFieldOrderCnt = 0;
|
|
}
|
|
|
|
/**
|
|
* Translate an FFmpeg Picture into its VA API form.
|
|
*
|
|
* @param[out] va_pic A pointer to VA API's own picture struct
|
|
* @param[in] pic A pointer to the FFmpeg picture struct to convert
|
|
* @param[in] pic_structure The picture field type (as defined in mpegvideo.h),
|
|
* supersedes pic's field type if nonzero.
|
|
*/
|
|
static void fill_vaapi_pic(VAPictureH264 *va_pic,
|
|
H264Picture *pic,
|
|
int pic_structure)
|
|
{
|
|
if (pic_structure == 0)
|
|
pic_structure = pic->reference;
|
|
pic_structure &= PICT_FRAME; /* PICT_TOP_FIELD|PICT_BOTTOM_FIELD */
|
|
|
|
va_pic->picture_id = ff_vaapi_get_surface_id(pic->f);
|
|
va_pic->frame_idx = pic->long_ref ? pic->pic_id : pic->frame_num;
|
|
|
|
va_pic->flags = 0;
|
|
if (pic_structure != PICT_FRAME)
|
|
va_pic->flags |= (pic_structure & PICT_TOP_FIELD) ? VA_PICTURE_H264_TOP_FIELD : VA_PICTURE_H264_BOTTOM_FIELD;
|
|
if (pic->reference)
|
|
va_pic->flags |= pic->long_ref ? VA_PICTURE_H264_LONG_TERM_REFERENCE : VA_PICTURE_H264_SHORT_TERM_REFERENCE;
|
|
|
|
va_pic->TopFieldOrderCnt = 0;
|
|
if (pic->field_poc[0] != INT_MAX)
|
|
va_pic->TopFieldOrderCnt = pic->field_poc[0];
|
|
|
|
va_pic->BottomFieldOrderCnt = 0;
|
|
if (pic->field_poc[1] != INT_MAX)
|
|
va_pic->BottomFieldOrderCnt = pic->field_poc[1];
|
|
}
|
|
|
|
/** Decoded Picture Buffer (DPB). */
|
|
typedef struct DPB {
|
|
int size; ///< Current number of reference frames in the DPB
|
|
int max_size; ///< Max number of reference frames. This is FF_ARRAY_ELEMS(VAPictureParameterBufferH264.ReferenceFrames)
|
|
VAPictureH264 *va_pics; ///< Pointer to VAPictureParameterBufferH264.ReferenceFrames array
|
|
} DPB;
|
|
|
|
/**
|
|
* Append picture to the decoded picture buffer, in a VA API form that
|
|
* merges the second field picture attributes with the first, if
|
|
* available. The decoded picture buffer's size must be large enough
|
|
* to receive the new VA API picture object.
|
|
*/
|
|
static int dpb_add(DPB *dpb, H264Picture *pic)
|
|
{
|
|
int i;
|
|
|
|
if (dpb->size >= dpb->max_size)
|
|
return -1;
|
|
|
|
for (i = 0; i < dpb->size; i++) {
|
|
VAPictureH264 * const va_pic = &dpb->va_pics[i];
|
|
if (va_pic->picture_id == ff_vaapi_get_surface_id(pic->f)) {
|
|
VAPictureH264 temp_va_pic;
|
|
fill_vaapi_pic(&temp_va_pic, pic, 0);
|
|
|
|
if ((temp_va_pic.flags ^ va_pic->flags) & (VA_PICTURE_H264_TOP_FIELD | VA_PICTURE_H264_BOTTOM_FIELD)) {
|
|
va_pic->flags |= temp_va_pic.flags & (VA_PICTURE_H264_TOP_FIELD | VA_PICTURE_H264_BOTTOM_FIELD);
|
|
/* Merge second field */
|
|
if (temp_va_pic.flags & VA_PICTURE_H264_TOP_FIELD) {
|
|
va_pic->TopFieldOrderCnt = temp_va_pic.TopFieldOrderCnt;
|
|
} else {
|
|
va_pic->BottomFieldOrderCnt = temp_va_pic.BottomFieldOrderCnt;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
fill_vaapi_pic(&dpb->va_pics[dpb->size++], pic, 0);
|
|
return 0;
|
|
}
|
|
|
|
/** Fill in VA API reference frames array. */
|
|
static int fill_vaapi_ReferenceFrames(VAPictureParameterBufferH264 *pic_param,
|
|
H264Context *h)
|
|
{
|
|
DPB dpb;
|
|
int i;
|
|
|
|
dpb.size = 0;
|
|
dpb.max_size = FF_ARRAY_ELEMS(pic_param->ReferenceFrames);
|
|
dpb.va_pics = pic_param->ReferenceFrames;
|
|
for (i = 0; i < dpb.max_size; i++)
|
|
init_vaapi_pic(&dpb.va_pics[i]);
|
|
|
|
for (i = 0; i < h->short_ref_count; i++) {
|
|
H264Picture * const pic = h->short_ref[i];
|
|
if (pic && pic->reference && dpb_add(&dpb, pic) < 0)
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
H264Picture * const pic = h->long_ref[i];
|
|
if (pic && pic->reference && dpb_add(&dpb, pic) < 0)
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Fill in VA API reference picture lists from the FFmpeg reference
|
|
* picture list.
|
|
*
|
|
* @param[out] RefPicList VA API internal reference picture list
|
|
* @param[in] ref_list A pointer to the FFmpeg reference list
|
|
* @param[in] ref_count The number of reference pictures in ref_list
|
|
*/
|
|
static void fill_vaapi_RefPicList(VAPictureH264 RefPicList[32],
|
|
H264Ref *ref_list,
|
|
unsigned int ref_count)
|
|
{
|
|
unsigned int i, n = 0;
|
|
for (i = 0; i < ref_count; i++)
|
|
if (ref_list[i].reference)
|
|
fill_vaapi_pic(&RefPicList[n++], ref_list[i].parent,
|
|
ref_list[i].reference);
|
|
|
|
for (; n < 32; n++)
|
|
init_vaapi_pic(&RefPicList[n]);
|
|
}
|
|
|
|
/**
|
|
* Fill in prediction weight table.
|
|
*
|
|
* VA API requires a plain prediction weight table as it does not infer
|
|
* any value.
|
|
*
|
|
* @param[in] h A pointer to the current H.264 context
|
|
* @param[in] list The reference frame list index to use
|
|
* @param[out] luma_weight_flag VA API plain luma weight flag
|
|
* @param[out] luma_weight VA API plain luma weight table
|
|
* @param[out] luma_offset VA API plain luma offset table
|
|
* @param[out] chroma_weight_flag VA API plain chroma weight flag
|
|
* @param[out] chroma_weight VA API plain chroma weight table
|
|
* @param[out] chroma_offset VA API plain chroma offset table
|
|
*/
|
|
static void fill_vaapi_plain_pred_weight_table(H264Context *h,
|
|
int list,
|
|
unsigned char *luma_weight_flag,
|
|
short luma_weight[32],
|
|
short luma_offset[32],
|
|
unsigned char *chroma_weight_flag,
|
|
short chroma_weight[32][2],
|
|
short chroma_offset[32][2])
|
|
{
|
|
H264SliceContext *sl = &h->slice_ctx[0];
|
|
unsigned int i, j;
|
|
|
|
*luma_weight_flag = sl->luma_weight_flag[list];
|
|
*chroma_weight_flag = sl->chroma_weight_flag[list];
|
|
|
|
for (i = 0; i < sl->ref_count[list]; i++) {
|
|
/* VA API also wants the inferred (default) values, not
|
|
only what is available in the bitstream (7.4.3.2). */
|
|
if (sl->luma_weight_flag[list]) {
|
|
luma_weight[i] = sl->luma_weight[i][list][0];
|
|
luma_offset[i] = sl->luma_weight[i][list][1];
|
|
} else {
|
|
luma_weight[i] = 1 << sl->luma_log2_weight_denom;
|
|
luma_offset[i] = 0;
|
|
}
|
|
for (j = 0; j < 2; j++) {
|
|
if (sl->chroma_weight_flag[list]) {
|
|
chroma_weight[i][j] = sl->chroma_weight[i][list][j][0];
|
|
chroma_offset[i][j] = sl->chroma_weight[i][list][j][1];
|
|
} else {
|
|
chroma_weight[i][j] = 1 << sl->chroma_log2_weight_denom;
|
|
chroma_offset[i][j] = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/** Initialize and start decoding a frame with VA API. */
|
|
static int vaapi_h264_start_frame(AVCodecContext *avctx,
|
|
av_unused const uint8_t *buffer,
|
|
av_unused uint32_t size)
|
|
{
|
|
H264Context * const h = avctx->priv_data;
|
|
FFVAContext * const vactx = ff_vaapi_get_context(avctx);
|
|
VAPictureParameterBufferH264 *pic_param;
|
|
VAIQMatrixBufferH264 *iq_matrix;
|
|
|
|
ff_dlog(avctx, "vaapi_h264_start_frame()\n");
|
|
|
|
vactx->slice_param_size = sizeof(VASliceParameterBufferH264);
|
|
|
|
/* Fill in VAPictureParameterBufferH264. */
|
|
pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferH264));
|
|
if (!pic_param)
|
|
return -1;
|
|
fill_vaapi_pic(&pic_param->CurrPic, h->cur_pic_ptr, h->picture_structure);
|
|
if (fill_vaapi_ReferenceFrames(pic_param, h) < 0)
|
|
return -1;
|
|
pic_param->picture_width_in_mbs_minus1 = h->mb_width - 1;
|
|
pic_param->picture_height_in_mbs_minus1 = h->mb_height - 1;
|
|
pic_param->bit_depth_luma_minus8 = h->sps.bit_depth_luma - 8;
|
|
pic_param->bit_depth_chroma_minus8 = h->sps.bit_depth_chroma - 8;
|
|
pic_param->num_ref_frames = h->sps.ref_frame_count;
|
|
pic_param->seq_fields.value = 0; /* reset all bits */
|
|
pic_param->seq_fields.bits.chroma_format_idc = h->sps.chroma_format_idc;
|
|
pic_param->seq_fields.bits.residual_colour_transform_flag = h->sps.residual_color_transform_flag; /* XXX: only for 4:4:4 high profile? */
|
|
pic_param->seq_fields.bits.gaps_in_frame_num_value_allowed_flag = h->sps.gaps_in_frame_num_allowed_flag;
|
|
pic_param->seq_fields.bits.frame_mbs_only_flag = h->sps.frame_mbs_only_flag;
|
|
pic_param->seq_fields.bits.mb_adaptive_frame_field_flag = h->sps.mb_aff;
|
|
pic_param->seq_fields.bits.direct_8x8_inference_flag = h->sps.direct_8x8_inference_flag;
|
|
pic_param->seq_fields.bits.MinLumaBiPredSize8x8 = h->sps.level_idc >= 31; /* A.3.3.2 */
|
|
pic_param->seq_fields.bits.log2_max_frame_num_minus4 = h->sps.log2_max_frame_num - 4;
|
|
pic_param->seq_fields.bits.pic_order_cnt_type = h->sps.poc_type;
|
|
pic_param->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4 = h->sps.log2_max_poc_lsb - 4;
|
|
pic_param->seq_fields.bits.delta_pic_order_always_zero_flag = h->sps.delta_pic_order_always_zero_flag;
|
|
pic_param->num_slice_groups_minus1 = h->pps.slice_group_count - 1;
|
|
pic_param->slice_group_map_type = h->pps.mb_slice_group_map_type;
|
|
pic_param->slice_group_change_rate_minus1 = 0; /* XXX: unimplemented in FFmpeg */
|
|
pic_param->pic_init_qp_minus26 = h->pps.init_qp - 26;
|
|
pic_param->pic_init_qs_minus26 = h->pps.init_qs - 26;
|
|
pic_param->chroma_qp_index_offset = h->pps.chroma_qp_index_offset[0];
|
|
pic_param->second_chroma_qp_index_offset = h->pps.chroma_qp_index_offset[1];
|
|
pic_param->pic_fields.value = 0; /* reset all bits */
|
|
pic_param->pic_fields.bits.entropy_coding_mode_flag = h->pps.cabac;
|
|
pic_param->pic_fields.bits.weighted_pred_flag = h->pps.weighted_pred;
|
|
pic_param->pic_fields.bits.weighted_bipred_idc = h->pps.weighted_bipred_idc;
|
|
pic_param->pic_fields.bits.transform_8x8_mode_flag = h->pps.transform_8x8_mode;
|
|
pic_param->pic_fields.bits.field_pic_flag = h->picture_structure != PICT_FRAME;
|
|
pic_param->pic_fields.bits.constrained_intra_pred_flag = h->pps.constrained_intra_pred;
|
|
pic_param->pic_fields.bits.pic_order_present_flag = h->pps.pic_order_present;
|
|
pic_param->pic_fields.bits.deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present;
|
|
pic_param->pic_fields.bits.redundant_pic_cnt_present_flag = h->pps.redundant_pic_cnt_present;
|
|
pic_param->pic_fields.bits.reference_pic_flag = h->nal_ref_idc != 0;
|
|
pic_param->frame_num = h->frame_num;
|
|
|
|
/* Fill in VAIQMatrixBufferH264. */
|
|
iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferH264));
|
|
if (!iq_matrix)
|
|
return -1;
|
|
memcpy(iq_matrix->ScalingList4x4, h->pps.scaling_matrix4, sizeof(iq_matrix->ScalingList4x4));
|
|
memcpy(iq_matrix->ScalingList8x8[0], h->pps.scaling_matrix8[0], sizeof(iq_matrix->ScalingList8x8[0]));
|
|
memcpy(iq_matrix->ScalingList8x8[1], h->pps.scaling_matrix8[3], sizeof(iq_matrix->ScalingList8x8[0]));
|
|
return 0;
|
|
}
|
|
|
|
/** End a hardware decoding based frame. */
|
|
static int vaapi_h264_end_frame(AVCodecContext *avctx)
|
|
{
|
|
FFVAContext * const vactx = ff_vaapi_get_context(avctx);
|
|
H264Context * const h = avctx->priv_data;
|
|
H264SliceContext *sl = &h->slice_ctx[0];
|
|
int ret;
|
|
|
|
ff_dlog(avctx, "vaapi_h264_end_frame()\n");
|
|
ret = ff_vaapi_commit_slices(vactx);
|
|
if (ret < 0)
|
|
goto finish;
|
|
|
|
ret = ff_vaapi_render_picture(vactx, ff_vaapi_get_surface_id(h->cur_pic_ptr->f));
|
|
if (ret < 0)
|
|
goto finish;
|
|
|
|
ff_h264_draw_horiz_band(h, sl, 0, h->avctx->height);
|
|
|
|
finish:
|
|
ff_vaapi_common_end_frame(avctx);
|
|
return ret;
|
|
}
|
|
|
|
/** Decode the given H.264 slice with VA API. */
|
|
static int vaapi_h264_decode_slice(AVCodecContext *avctx,
|
|
const uint8_t *buffer,
|
|
uint32_t size)
|
|
{
|
|
FFVAContext * const vactx = ff_vaapi_get_context(avctx);
|
|
H264Context * const h = avctx->priv_data;
|
|
H264SliceContext *sl = &h->slice_ctx[0];
|
|
VASliceParameterBufferH264 *slice_param;
|
|
|
|
ff_dlog(avctx, "vaapi_h264_decode_slice(): buffer %p, size %d\n",
|
|
buffer, size);
|
|
|
|
/* Fill in VASliceParameterBufferH264. */
|
|
slice_param = (VASliceParameterBufferH264 *)ff_vaapi_alloc_slice(vactx, buffer, size);
|
|
if (!slice_param)
|
|
return -1;
|
|
slice_param->slice_data_bit_offset = get_bits_count(&sl->gb) + 8; /* bit buffer started beyond nal_unit_type */
|
|
slice_param->first_mb_in_slice = (sl->mb_y >> FIELD_OR_MBAFF_PICTURE(h)) * h->mb_width + sl->mb_x;
|
|
slice_param->slice_type = ff_h264_get_slice_type(sl);
|
|
slice_param->direct_spatial_mv_pred_flag = sl->slice_type == AV_PICTURE_TYPE_B ? sl->direct_spatial_mv_pred : 0;
|
|
slice_param->num_ref_idx_l0_active_minus1 = sl->list_count > 0 ? sl->ref_count[0] - 1 : 0;
|
|
slice_param->num_ref_idx_l1_active_minus1 = sl->list_count > 1 ? sl->ref_count[1] - 1 : 0;
|
|
slice_param->cabac_init_idc = sl->cabac_init_idc;
|
|
slice_param->slice_qp_delta = sl->qscale - h->pps.init_qp;
|
|
slice_param->disable_deblocking_filter_idc = sl->deblocking_filter < 2 ? !sl->deblocking_filter : sl->deblocking_filter;
|
|
slice_param->slice_alpha_c0_offset_div2 = sl->slice_alpha_c0_offset / 2;
|
|
slice_param->slice_beta_offset_div2 = sl->slice_beta_offset / 2;
|
|
slice_param->luma_log2_weight_denom = sl->luma_log2_weight_denom;
|
|
slice_param->chroma_log2_weight_denom = sl->chroma_log2_weight_denom;
|
|
|
|
fill_vaapi_RefPicList(slice_param->RefPicList0, sl->ref_list[0], sl->list_count > 0 ? sl->ref_count[0] : 0);
|
|
fill_vaapi_RefPicList(slice_param->RefPicList1, sl->ref_list[1], sl->list_count > 1 ? sl->ref_count[1] : 0);
|
|
|
|
fill_vaapi_plain_pred_weight_table(h, 0,
|
|
&slice_param->luma_weight_l0_flag, slice_param->luma_weight_l0, slice_param->luma_offset_l0,
|
|
&slice_param->chroma_weight_l0_flag, slice_param->chroma_weight_l0, slice_param->chroma_offset_l0);
|
|
fill_vaapi_plain_pred_weight_table(h, 1,
|
|
&slice_param->luma_weight_l1_flag, slice_param->luma_weight_l1, slice_param->luma_offset_l1,
|
|
&slice_param->chroma_weight_l1_flag, slice_param->chroma_weight_l1, slice_param->chroma_offset_l1);
|
|
return 0;
|
|
}
|
|
|
|
AVHWAccel ff_h264_vaapi_hwaccel = {
|
|
.name = "h264_vaapi",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_H264,
|
|
.pix_fmt = AV_PIX_FMT_VAAPI,
|
|
.start_frame = vaapi_h264_start_frame,
|
|
.end_frame = vaapi_h264_end_frame,
|
|
.decode_slice = vaapi_h264_decode_slice,
|
|
.init = ff_vaapi_context_init,
|
|
.uninit = ff_vaapi_context_fini,
|
|
.priv_data_size = sizeof(FFVAContext),
|
|
};
|