Libav 0.7.1
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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 Libav. 00007 * 00008 * Libav 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 * Libav 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 Libav; 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 pic_structure &= PICT_FRAME; /* PICT_TOP_FIELD|PICT_BOTTOM_FIELD */ 00059 00060 va_pic->picture_id = ff_vaapi_get_surface_id(pic); 00061 va_pic->frame_idx = pic->long_ref ? pic->pic_id : pic->frame_num; 00062 00063 va_pic->flags = 0; 00064 if (pic_structure != PICT_FRAME) 00065 va_pic->flags |= (pic_structure & PICT_TOP_FIELD) ? VA_PICTURE_H264_TOP_FIELD : VA_PICTURE_H264_BOTTOM_FIELD; 00066 if (pic->reference) 00067 va_pic->flags |= pic->long_ref ? VA_PICTURE_H264_LONG_TERM_REFERENCE : VA_PICTURE_H264_SHORT_TERM_REFERENCE; 00068 00069 va_pic->TopFieldOrderCnt = 0; 00070 if (pic->field_poc[0] != INT_MAX) 00071 va_pic->TopFieldOrderCnt = pic->field_poc[0]; 00072 00073 va_pic->BottomFieldOrderCnt = 0; 00074 if (pic->field_poc[1] != INT_MAX) 00075 va_pic->BottomFieldOrderCnt = pic->field_poc[1]; 00076 } 00077 00079 typedef struct DPB { 00080 int size; 00081 int max_size; 00082 VAPictureH264 *va_pics; 00083 } DPB; 00084 00091 static int dpb_add(DPB *dpb, Picture *pic) 00092 { 00093 int i; 00094 00095 if (dpb->size >= dpb->max_size) 00096 return -1; 00097 00098 for (i = 0; i < dpb->size; i++) { 00099 VAPictureH264 * const va_pic = &dpb->va_pics[i]; 00100 if (va_pic->picture_id == ff_vaapi_get_surface_id(pic)) { 00101 VAPictureH264 temp_va_pic; 00102 fill_vaapi_pic(&temp_va_pic, pic, 0); 00103 00104 if ((temp_va_pic.flags ^ va_pic->flags) & (VA_PICTURE_H264_TOP_FIELD | VA_PICTURE_H264_BOTTOM_FIELD)) { 00105 va_pic->flags |= temp_va_pic.flags & (VA_PICTURE_H264_TOP_FIELD | VA_PICTURE_H264_BOTTOM_FIELD); 00106 /* Merge second field */ 00107 if (temp_va_pic.flags & VA_PICTURE_H264_TOP_FIELD) { 00108 va_pic->TopFieldOrderCnt = temp_va_pic.TopFieldOrderCnt; 00109 } else { 00110 va_pic->BottomFieldOrderCnt = temp_va_pic.BottomFieldOrderCnt; 00111 } 00112 } 00113 return 0; 00114 } 00115 } 00116 00117 fill_vaapi_pic(&dpb->va_pics[dpb->size++], pic, 0); 00118 return 0; 00119 } 00120 00122 static int fill_vaapi_ReferenceFrames(VAPictureParameterBufferH264 *pic_param, 00123 H264Context *h) 00124 { 00125 DPB dpb; 00126 int i; 00127 00128 dpb.size = 0; 00129 dpb.max_size = FF_ARRAY_ELEMS(pic_param->ReferenceFrames); 00130 dpb.va_pics = pic_param->ReferenceFrames; 00131 for (i = 0; i < dpb.max_size; i++) 00132 init_vaapi_pic(&dpb.va_pics[i]); 00133 00134 for (i = 0; i < h->short_ref_count; i++) { 00135 Picture * const pic = h->short_ref[i]; 00136 if (pic && pic->reference && dpb_add(&dpb, pic) < 0) 00137 return -1; 00138 } 00139 00140 for (i = 0; i < 16; i++) { 00141 Picture * const pic = h->long_ref[i]; 00142 if (pic && pic->reference && dpb_add(&dpb, pic) < 0) 00143 return -1; 00144 } 00145 return 0; 00146 } 00147 00156 static void fill_vaapi_RefPicList(VAPictureH264 RefPicList[32], 00157 Picture *ref_list, 00158 unsigned int ref_count) 00159 { 00160 unsigned int i, n = 0; 00161 for (i = 0; i < ref_count; i++) 00162 if (ref_list[i].reference) 00163 fill_vaapi_pic(&RefPicList[n++], &ref_list[i], 0); 00164 00165 for (; n < 32; n++) 00166 init_vaapi_pic(&RefPicList[n]); 00167 } 00168 00184 static void fill_vaapi_plain_pred_weight_table(H264Context *h, 00185 int list, 00186 unsigned char *luma_weight_flag, 00187 short luma_weight[32], 00188 short luma_offset[32], 00189 unsigned char *chroma_weight_flag, 00190 short chroma_weight[32][2], 00191 short chroma_offset[32][2]) 00192 { 00193 unsigned int i, j; 00194 00195 *luma_weight_flag = h->luma_weight_flag[list]; 00196 *chroma_weight_flag = h->chroma_weight_flag[list]; 00197 00198 for (i = 0; i < h->ref_count[list]; i++) { 00199 /* VA API also wants the inferred (default) values, not 00200 only what is available in the bitstream (7.4.3.2). */ 00201 if (h->luma_weight_flag[list]) { 00202 luma_weight[i] = h->luma_weight[i][list][0]; 00203 luma_offset[i] = h->luma_weight[i][list][1]; 00204 } else { 00205 luma_weight[i] = 1 << h->luma_log2_weight_denom; 00206 luma_offset[i] = 0; 00207 } 00208 for (j = 0; j < 2; j++) { 00209 if (h->chroma_weight_flag[list]) { 00210 chroma_weight[i][j] = h->chroma_weight[i][list][j][0]; 00211 chroma_offset[i][j] = h->chroma_weight[i][list][j][1]; 00212 } else { 00213 chroma_weight[i][j] = 1 << h->chroma_log2_weight_denom; 00214 chroma_offset[i][j] = 0; 00215 } 00216 } 00217 } 00218 } 00219 00221 static int start_frame(AVCodecContext *avctx, 00222 av_unused const uint8_t *buffer, 00223 av_unused uint32_t size) 00224 { 00225 H264Context * const h = avctx->priv_data; 00226 MpegEncContext * const s = &h->s; 00227 struct vaapi_context * const vactx = avctx->hwaccel_context; 00228 VAPictureParameterBufferH264 *pic_param; 00229 VAIQMatrixBufferH264 *iq_matrix; 00230 00231 av_dlog(avctx, "start_frame()\n"); 00232 00233 vactx->slice_param_size = sizeof(VASliceParameterBufferH264); 00234 00235 /* Fill in VAPictureParameterBufferH264. */ 00236 pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferH264)); 00237 if (!pic_param) 00238 return -1; 00239 fill_vaapi_pic(&pic_param->CurrPic, s->current_picture_ptr, s->picture_structure); 00240 if (fill_vaapi_ReferenceFrames(pic_param, h) < 0) 00241 return -1; 00242 pic_param->picture_width_in_mbs_minus1 = s->mb_width - 1; 00243 pic_param->picture_height_in_mbs_minus1 = s->mb_height - 1; 00244 pic_param->bit_depth_luma_minus8 = h->sps.bit_depth_luma - 8; 00245 pic_param->bit_depth_chroma_minus8 = h->sps.bit_depth_chroma - 8; 00246 pic_param->num_ref_frames = h->sps.ref_frame_count; 00247 pic_param->seq_fields.value = 0; /* reset all bits */ 00248 pic_param->seq_fields.bits.chroma_format_idc = h->sps.chroma_format_idc; 00249 pic_param->seq_fields.bits.residual_colour_transform_flag = h->sps.residual_color_transform_flag; /* XXX: only for 4:4:4 high profile? */ 00250 pic_param->seq_fields.bits.gaps_in_frame_num_value_allowed_flag = h->sps.gaps_in_frame_num_allowed_flag; 00251 pic_param->seq_fields.bits.frame_mbs_only_flag = h->sps.frame_mbs_only_flag; 00252 pic_param->seq_fields.bits.mb_adaptive_frame_field_flag = h->sps.mb_aff; 00253 pic_param->seq_fields.bits.direct_8x8_inference_flag = h->sps.direct_8x8_inference_flag; 00254 pic_param->seq_fields.bits.MinLumaBiPredSize8x8 = h->sps.level_idc >= 31; /* A.3.3.2 */ 00255 pic_param->seq_fields.bits.log2_max_frame_num_minus4 = h->sps.log2_max_frame_num - 4; 00256 pic_param->seq_fields.bits.pic_order_cnt_type = h->sps.poc_type; 00257 pic_param->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4 = h->sps.log2_max_poc_lsb - 4; 00258 pic_param->seq_fields.bits.delta_pic_order_always_zero_flag = h->sps.delta_pic_order_always_zero_flag; 00259 pic_param->num_slice_groups_minus1 = h->pps.slice_group_count - 1; 00260 pic_param->slice_group_map_type = h->pps.mb_slice_group_map_type; 00261 pic_param->slice_group_change_rate_minus1 = 0; /* XXX: unimplemented in Libav */ 00262 pic_param->pic_init_qp_minus26 = h->pps.init_qp - 26; 00263 pic_param->pic_init_qs_minus26 = h->pps.init_qs - 26; 00264 pic_param->chroma_qp_index_offset = h->pps.chroma_qp_index_offset[0]; 00265 pic_param->second_chroma_qp_index_offset = h->pps.chroma_qp_index_offset[1]; 00266 pic_param->pic_fields.value = 0; /* reset all bits */ 00267 pic_param->pic_fields.bits.entropy_coding_mode_flag = h->pps.cabac; 00268 pic_param->pic_fields.bits.weighted_pred_flag = h->pps.weighted_pred; 00269 pic_param->pic_fields.bits.weighted_bipred_idc = h->pps.weighted_bipred_idc; 00270 pic_param->pic_fields.bits.transform_8x8_mode_flag = h->pps.transform_8x8_mode; 00271 pic_param->pic_fields.bits.field_pic_flag = s->picture_structure != PICT_FRAME; 00272 pic_param->pic_fields.bits.constrained_intra_pred_flag = h->pps.constrained_intra_pred; 00273 pic_param->pic_fields.bits.pic_order_present_flag = h->pps.pic_order_present; 00274 pic_param->pic_fields.bits.deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present; 00275 pic_param->pic_fields.bits.redundant_pic_cnt_present_flag = h->pps.redundant_pic_cnt_present; 00276 pic_param->pic_fields.bits.reference_pic_flag = h->nal_ref_idc != 0; 00277 pic_param->frame_num = h->frame_num; 00278 00279 /* Fill in VAIQMatrixBufferH264. */ 00280 iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferH264)); 00281 if (!iq_matrix) 00282 return -1; 00283 memcpy(iq_matrix->ScalingList4x4, h->pps.scaling_matrix4, sizeof(iq_matrix->ScalingList4x4)); 00284 memcpy(iq_matrix->ScalingList8x8, h->pps.scaling_matrix8, sizeof(iq_matrix->ScalingList8x8)); 00285 return 0; 00286 } 00287 00289 static int end_frame(AVCodecContext *avctx) 00290 { 00291 H264Context * const h = avctx->priv_data; 00292 00293 av_dlog(avctx, "end_frame()\n"); 00294 return ff_vaapi_common_end_frame(&h->s); 00295 } 00296 00298 static int decode_slice(AVCodecContext *avctx, 00299 const uint8_t *buffer, 00300 uint32_t size) 00301 { 00302 H264Context * const h = avctx->priv_data; 00303 MpegEncContext * const s = &h->s; 00304 VASliceParameterBufferH264 *slice_param; 00305 00306 av_dlog(avctx, "decode_slice(): buffer %p, size %d\n", buffer, size); 00307 00308 /* Fill in VASliceParameterBufferH264. */ 00309 slice_param = (VASliceParameterBufferH264 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size); 00310 if (!slice_param) 00311 return -1; 00312 slice_param->slice_data_bit_offset = get_bits_count(&h->s.gb) + 8; /* bit buffer started beyond nal_unit_type */ 00313 slice_param->first_mb_in_slice = (s->mb_y >> FIELD_OR_MBAFF_PICTURE) * s->mb_width + s->mb_x; 00314 slice_param->slice_type = ff_h264_get_slice_type(h); 00315 slice_param->direct_spatial_mv_pred_flag = h->slice_type == AV_PICTURE_TYPE_B ? h->direct_spatial_mv_pred : 0; 00316 slice_param->num_ref_idx_l0_active_minus1 = h->list_count > 0 ? h->ref_count[0] - 1 : 0; 00317 slice_param->num_ref_idx_l1_active_minus1 = h->list_count > 1 ? h->ref_count[1] - 1 : 0; 00318 slice_param->cabac_init_idc = h->cabac_init_idc; 00319 slice_param->slice_qp_delta = s->qscale - h->pps.init_qp; 00320 slice_param->disable_deblocking_filter_idc = h->deblocking_filter < 2 ? !h->deblocking_filter : h->deblocking_filter; 00321 slice_param->slice_alpha_c0_offset_div2 = h->slice_alpha_c0_offset / 2 - 26; 00322 slice_param->slice_beta_offset_div2 = h->slice_beta_offset / 2 - 26; 00323 slice_param->luma_log2_weight_denom = h->luma_log2_weight_denom; 00324 slice_param->chroma_log2_weight_denom = h->chroma_log2_weight_denom; 00325 00326 fill_vaapi_RefPicList(slice_param->RefPicList0, h->ref_list[0], h->list_count > 0 ? h->ref_count[0] : 0); 00327 fill_vaapi_RefPicList(slice_param->RefPicList1, h->ref_list[1], h->list_count > 1 ? h->ref_count[1] : 0); 00328 00329 fill_vaapi_plain_pred_weight_table(h, 0, 00330 &slice_param->luma_weight_l0_flag, slice_param->luma_weight_l0, slice_param->luma_offset_l0, 00331 &slice_param->chroma_weight_l0_flag, slice_param->chroma_weight_l0, slice_param->chroma_offset_l0); 00332 fill_vaapi_plain_pred_weight_table(h, 1, 00333 &slice_param->luma_weight_l1_flag, slice_param->luma_weight_l1, slice_param->luma_offset_l1, 00334 &slice_param->chroma_weight_l1_flag, slice_param->chroma_weight_l1, slice_param->chroma_offset_l1); 00335 return 0; 00336 } 00337 00338 AVHWAccel ff_h264_vaapi_hwaccel = { 00339 .name = "h264_vaapi", 00340 .type = AVMEDIA_TYPE_VIDEO, 00341 .id = CODEC_ID_H264, 00342 .pix_fmt = PIX_FMT_VAAPI_VLD, 00343 .capabilities = 0, 00344 .start_frame = start_frame, 00345 .end_frame = end_frame, 00346 .decode_slice = decode_slice, 00347 .priv_data_size = 0, 00348 };