Libav
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00001 /* 00002 * H.264 HW decode acceleration through VA API 00003 * 00004 * Copyright (C) 2008-2009 Splitted-Desktop Systems 00005 * 00006 * This file is part of FFmpeg. 00007 * 00008 * FFmpeg is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * FFmpeg is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with FFmpeg; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00023 #include "vaapi_internal.h" 00024 #include "h264.h" 00025 00036 static void init_vaapi_pic(VAPictureH264 *va_pic) 00037 { 00038 va_pic->picture_id = VA_INVALID_ID; 00039 va_pic->flags = VA_PICTURE_H264_INVALID; 00040 va_pic->TopFieldOrderCnt = 0; 00041 va_pic->BottomFieldOrderCnt = 0; 00042 } 00043 00052 static void fill_vaapi_pic(VAPictureH264 *va_pic, 00053 Picture *pic, 00054 int pic_structure) 00055 { 00056 if (pic_structure == 0) 00057 pic_structure = pic->reference; 00058 00059 va_pic->picture_id = ff_vaapi_get_surface_id(pic); 00060 va_pic->frame_idx = pic->long_ref ? pic->pic_id : pic->frame_num; 00061 00062 va_pic->flags = 0; 00063 if (pic_structure != PICT_FRAME) 00064 va_pic->flags |= (pic_structure & PICT_TOP_FIELD) ? VA_PICTURE_H264_TOP_FIELD : VA_PICTURE_H264_BOTTOM_FIELD; 00065 if (pic->reference) 00066 va_pic->flags |= pic->long_ref ? VA_PICTURE_H264_LONG_TERM_REFERENCE : VA_PICTURE_H264_SHORT_TERM_REFERENCE; 00067 00068 va_pic->TopFieldOrderCnt = 0; 00069 if (pic->field_poc[0] != INT_MAX) 00070 va_pic->TopFieldOrderCnt = pic->field_poc[0]; 00071 00072 va_pic->BottomFieldOrderCnt = 0; 00073 if (pic->field_poc[1] != INT_MAX) 00074 va_pic->BottomFieldOrderCnt = pic->field_poc[1]; 00075 } 00076 00078 typedef struct DPB { 00079 int size; 00080 int max_size; 00081 VAPictureH264 *va_pics; 00082 } DPB; 00083 00090 static int dpb_add(DPB *dpb, Picture *pic) 00091 { 00092 int i; 00093 00094 if (dpb->size >= dpb->max_size) 00095 return -1; 00096 00097 for (i = 0; i < dpb->size; i++) { 00098 VAPictureH264 * const va_pic = &dpb->va_pics[i]; 00099 if (va_pic->picture_id == ff_vaapi_get_surface_id(pic)) { 00100 VAPictureH264 temp_va_pic; 00101 fill_vaapi_pic(&temp_va_pic, pic, 0); 00102 00103 if ((temp_va_pic.flags ^ va_pic->flags) & (VA_PICTURE_H264_TOP_FIELD | VA_PICTURE_H264_BOTTOM_FIELD)) { 00104 va_pic->flags |= temp_va_pic.flags & (VA_PICTURE_H264_TOP_FIELD | VA_PICTURE_H264_BOTTOM_FIELD); 00105 /* Merge second field */ 00106 if (temp_va_pic.flags & VA_PICTURE_H264_TOP_FIELD) { 00107 va_pic->TopFieldOrderCnt = temp_va_pic.TopFieldOrderCnt; 00108 } else { 00109 va_pic->BottomFieldOrderCnt = temp_va_pic.BottomFieldOrderCnt; 00110 } 00111 } 00112 return 0; 00113 } 00114 } 00115 00116 fill_vaapi_pic(&dpb->va_pics[dpb->size++], pic, 0); 00117 return 0; 00118 } 00119 00121 static int fill_vaapi_ReferenceFrames(VAPictureParameterBufferH264 *pic_param, 00122 H264Context *h) 00123 { 00124 DPB dpb; 00125 int i; 00126 00127 dpb.size = 0; 00128 dpb.max_size = FF_ARRAY_ELEMS(pic_param->ReferenceFrames); 00129 dpb.va_pics = pic_param->ReferenceFrames; 00130 for (i = 0; i < dpb.max_size; i++) 00131 init_vaapi_pic(&dpb.va_pics[i]); 00132 00133 for (i = 0; i < h->short_ref_count; i++) { 00134 Picture * const pic = h->short_ref[i]; 00135 if (pic && pic->reference && dpb_add(&dpb, pic) < 0) 00136 return -1; 00137 } 00138 00139 for (i = 0; i < 16; i++) { 00140 Picture * const pic = h->long_ref[i]; 00141 if (pic && pic->reference && dpb_add(&dpb, pic) < 0) 00142 return -1; 00143 } 00144 return 0; 00145 } 00146 00155 static void fill_vaapi_RefPicList(VAPictureH264 RefPicList[32], 00156 Picture *ref_list, 00157 unsigned int ref_count) 00158 { 00159 unsigned int i, n = 0; 00160 for (i = 0; i < ref_count; i++) 00161 if (ref_list[i].reference) 00162 fill_vaapi_pic(&RefPicList[n++], &ref_list[i], 0); 00163 00164 for (; n < 32; n++) 00165 init_vaapi_pic(&RefPicList[n]); 00166 } 00167 00183 static void fill_vaapi_plain_pred_weight_table(H264Context *h, 00184 int list, 00185 unsigned char *luma_weight_flag, 00186 short luma_weight[32], 00187 short luma_offset[32], 00188 unsigned char *chroma_weight_flag, 00189 short chroma_weight[32][2], 00190 short chroma_offset[32][2]) 00191 { 00192 unsigned int i, j; 00193 00194 *luma_weight_flag = h->luma_weight_flag[list]; 00195 *chroma_weight_flag = h->chroma_weight_flag[list]; 00196 00197 for (i = 0; i < h->ref_count[list]; i++) { 00198 /* VA API also wants the inferred (default) values, not 00199 only what is available in the bitstream (7.4.3.2). */ 00200 if (h->luma_weight_flag[list]) { 00201 luma_weight[i] = h->luma_weight[i][list][0]; 00202 luma_offset[i] = h->luma_weight[i][list][1]; 00203 } else { 00204 luma_weight[i] = 1 << h->luma_log2_weight_denom; 00205 luma_offset[i] = 0; 00206 } 00207 for (j = 0; j < 2; j++) { 00208 if (h->chroma_weight_flag[list]) { 00209 chroma_weight[i][j] = h->chroma_weight[i][list][j][0]; 00210 chroma_offset[i][j] = h->chroma_weight[i][list][j][1]; 00211 } else { 00212 chroma_weight[i][j] = 1 << h->chroma_log2_weight_denom; 00213 chroma_offset[i][j] = 0; 00214 } 00215 } 00216 } 00217 } 00218 00220 static int start_frame(AVCodecContext *avctx, 00221 av_unused const uint8_t *buffer, 00222 av_unused uint32_t size) 00223 { 00224 H264Context * const h = avctx->priv_data; 00225 MpegEncContext * const s = &h->s; 00226 struct vaapi_context * const vactx = avctx->hwaccel_context; 00227 VAPictureParameterBufferH264 *pic_param; 00228 VAIQMatrixBufferH264 *iq_matrix; 00229 00230 dprintf(avctx, "start_frame()\n"); 00231 00232 vactx->slice_param_size = sizeof(VASliceParameterBufferH264); 00233 00234 /* Fill in VAPictureParameterBufferH264. */ 00235 pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferH264)); 00236 if (!pic_param) 00237 return -1; 00238 fill_vaapi_pic(&pic_param->CurrPic, s->current_picture_ptr, s->picture_structure); 00239 if (fill_vaapi_ReferenceFrames(pic_param, h) < 0) 00240 return -1; 00241 pic_param->picture_width_in_mbs_minus1 = s->mb_width - 1; 00242 pic_param->picture_height_in_mbs_minus1 = s->mb_height - 1; 00243 pic_param->bit_depth_luma_minus8 = h->sps.bit_depth_luma - 8; 00244 pic_param->bit_depth_chroma_minus8 = h->sps.bit_depth_chroma - 8; 00245 pic_param->num_ref_frames = h->sps.ref_frame_count; 00246 pic_param->seq_fields.value = 0; /* reset all bits */ 00247 pic_param->seq_fields.bits.chroma_format_idc = h->sps.chroma_format_idc; 00248 pic_param->seq_fields.bits.residual_colour_transform_flag = h->sps.residual_color_transform_flag; /* XXX: only for 4:4:4 high profile? */ 00249 pic_param->seq_fields.bits.gaps_in_frame_num_value_allowed_flag = h->sps.gaps_in_frame_num_allowed_flag; 00250 pic_param->seq_fields.bits.frame_mbs_only_flag = h->sps.frame_mbs_only_flag; 00251 pic_param->seq_fields.bits.mb_adaptive_frame_field_flag = h->sps.mb_aff; 00252 pic_param->seq_fields.bits.direct_8x8_inference_flag = h->sps.direct_8x8_inference_flag; 00253 pic_param->seq_fields.bits.MinLumaBiPredSize8x8 = h->sps.level_idc >= 31; /* A.3.3.2 */ 00254 pic_param->seq_fields.bits.log2_max_frame_num_minus4 = h->sps.log2_max_frame_num - 4; 00255 pic_param->seq_fields.bits.pic_order_cnt_type = h->sps.poc_type; 00256 pic_param->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4 = h->sps.log2_max_poc_lsb - 4; 00257 pic_param->seq_fields.bits.delta_pic_order_always_zero_flag = h->sps.delta_pic_order_always_zero_flag; 00258 pic_param->num_slice_groups_minus1 = h->pps.slice_group_count - 1; 00259 pic_param->slice_group_map_type = h->pps.mb_slice_group_map_type; 00260 pic_param->slice_group_change_rate_minus1 = 0; /* XXX: unimplemented in FFmpeg */ 00261 pic_param->pic_init_qp_minus26 = h->pps.init_qp - 26; 00262 pic_param->pic_init_qs_minus26 = h->pps.init_qs - 26; 00263 pic_param->chroma_qp_index_offset = h->pps.chroma_qp_index_offset[0]; 00264 pic_param->second_chroma_qp_index_offset = h->pps.chroma_qp_index_offset[1]; 00265 pic_param->pic_fields.value = 0; /* reset all bits */ 00266 pic_param->pic_fields.bits.entropy_coding_mode_flag = h->pps.cabac; 00267 pic_param->pic_fields.bits.weighted_pred_flag = h->pps.weighted_pred; 00268 pic_param->pic_fields.bits.weighted_bipred_idc = h->pps.weighted_bipred_idc; 00269 pic_param->pic_fields.bits.transform_8x8_mode_flag = h->pps.transform_8x8_mode; 00270 pic_param->pic_fields.bits.field_pic_flag = s->picture_structure != PICT_FRAME; 00271 pic_param->pic_fields.bits.constrained_intra_pred_flag = h->pps.constrained_intra_pred; 00272 pic_param->pic_fields.bits.pic_order_present_flag = h->pps.pic_order_present; 00273 pic_param->pic_fields.bits.deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present; 00274 pic_param->pic_fields.bits.redundant_pic_cnt_present_flag = h->pps.redundant_pic_cnt_present; 00275 pic_param->pic_fields.bits.reference_pic_flag = h->nal_ref_idc != 0; 00276 pic_param->frame_num = h->frame_num; 00277 00278 /* Fill in VAIQMatrixBufferH264. */ 00279 iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferH264)); 00280 if (!iq_matrix) 00281 return -1; 00282 memcpy(iq_matrix->ScalingList4x4, h->pps.scaling_matrix4, sizeof(iq_matrix->ScalingList4x4)); 00283 memcpy(iq_matrix->ScalingList8x8, h->pps.scaling_matrix8, sizeof(iq_matrix->ScalingList8x8)); 00284 return 0; 00285 } 00286 00288 static int end_frame(AVCodecContext *avctx) 00289 { 00290 H264Context * const h = avctx->priv_data; 00291 00292 dprintf(avctx, "end_frame()\n"); 00293 return ff_vaapi_common_end_frame(&h->s); 00294 } 00295 00297 static int decode_slice(AVCodecContext *avctx, 00298 const uint8_t *buffer, 00299 uint32_t size) 00300 { 00301 H264Context * const h = avctx->priv_data; 00302 MpegEncContext * const s = &h->s; 00303 VASliceParameterBufferH264 *slice_param; 00304 00305 dprintf(avctx, "decode_slice(): buffer %p, size %d\n", buffer, size); 00306 00307 /* Fill in VASliceParameterBufferH264. */ 00308 slice_param = (VASliceParameterBufferH264 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size); 00309 if (!slice_param) 00310 return -1; 00311 slice_param->slice_data_bit_offset = get_bits_count(&h->s.gb) + 8; /* bit buffer started beyond nal_unit_type */ 00312 slice_param->first_mb_in_slice = (s->mb_y >> FIELD_OR_MBAFF_PICTURE) * s->mb_width + s->mb_x; 00313 slice_param->slice_type = ff_h264_get_slice_type(h); 00314 slice_param->direct_spatial_mv_pred_flag = h->slice_type == FF_B_TYPE ? h->direct_spatial_mv_pred : 0; 00315 slice_param->num_ref_idx_l0_active_minus1 = h->list_count > 0 ? h->ref_count[0] - 1 : 0; 00316 slice_param->num_ref_idx_l1_active_minus1 = h->list_count > 1 ? h->ref_count[1] - 1 : 0; 00317 slice_param->cabac_init_idc = h->cabac_init_idc; 00318 slice_param->slice_qp_delta = s->qscale - h->pps.init_qp; 00319 slice_param->disable_deblocking_filter_idc = h->deblocking_filter < 2 ? !h->deblocking_filter : h->deblocking_filter; 00320 slice_param->slice_alpha_c0_offset_div2 = h->slice_alpha_c0_offset / 2 - 26; 00321 slice_param->slice_beta_offset_div2 = h->slice_beta_offset / 2 - 26; 00322 slice_param->luma_log2_weight_denom = h->luma_log2_weight_denom; 00323 slice_param->chroma_log2_weight_denom = h->chroma_log2_weight_denom; 00324 00325 fill_vaapi_RefPicList(slice_param->RefPicList0, h->ref_list[0], h->list_count > 0 ? h->ref_count[0] : 0); 00326 fill_vaapi_RefPicList(slice_param->RefPicList1, h->ref_list[1], h->list_count > 1 ? h->ref_count[1] : 0); 00327 00328 fill_vaapi_plain_pred_weight_table(h, 0, 00329 &slice_param->luma_weight_l0_flag, slice_param->luma_weight_l0, slice_param->luma_offset_l0, 00330 &slice_param->chroma_weight_l0_flag, slice_param->chroma_weight_l0, slice_param->chroma_offset_l0); 00331 fill_vaapi_plain_pred_weight_table(h, 1, 00332 &slice_param->luma_weight_l1_flag, slice_param->luma_weight_l1, slice_param->luma_offset_l1, 00333 &slice_param->chroma_weight_l1_flag, slice_param->chroma_weight_l1, slice_param->chroma_offset_l1); 00334 return 0; 00335 } 00336 00337 AVHWAccel h264_vaapi_hwaccel = { 00338 .name = "h264_vaapi", 00339 .type = AVMEDIA_TYPE_VIDEO, 00340 .id = CODEC_ID_H264, 00341 .pix_fmt = PIX_FMT_VAAPI_VLD, 00342 .capabilities = 0, 00343 .start_frame = start_frame, 00344 .end_frame = end_frame, 00345 .decode_slice = decode_slice, 00346 .priv_data_size = 0, 00347 };