Libav 0.7.1
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00001 /* 00002 * MPEG-4 / H.263 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 "h263.h" 00025 00027 static int mpeg4_get_intra_dc_vlc_thr(MpegEncContext *s) 00028 { 00029 switch (s->intra_dc_threshold) { 00030 case 99: return 0; 00031 case 13: return 1; 00032 case 15: return 2; 00033 case 17: return 3; 00034 case 19: return 4; 00035 case 21: return 5; 00036 case 23: return 6; 00037 case 0: return 7; 00038 } 00039 return 0; 00040 } 00041 00042 static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size) 00043 { 00044 MpegEncContext * const s = avctx->priv_data; 00045 struct vaapi_context * const vactx = avctx->hwaccel_context; 00046 VAPictureParameterBufferMPEG4 *pic_param; 00047 VAIQMatrixBufferMPEG4 *iq_matrix; 00048 int i; 00049 00050 av_dlog(avctx, "vaapi_mpeg4_start_frame()\n"); 00051 00052 vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4); 00053 00054 /* Fill in VAPictureParameterBufferMPEG4 */ 00055 pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG4)); 00056 if (!pic_param) 00057 return -1; 00058 pic_param->vop_width = s->width; 00059 pic_param->vop_height = s->height; 00060 pic_param->forward_reference_picture = VA_INVALID_ID; 00061 pic_param->backward_reference_picture = VA_INVALID_ID; 00062 pic_param->vol_fields.value = 0; /* reset all bits */ 00063 pic_param->vol_fields.bits.short_video_header = avctx->codec->id == CODEC_ID_H263; 00064 pic_param->vol_fields.bits.chroma_format = CHROMA_420; 00065 pic_param->vol_fields.bits.interlaced = !s->progressive_sequence; 00066 pic_param->vol_fields.bits.obmc_disable = 1; 00067 pic_param->vol_fields.bits.sprite_enable = s->vol_sprite_usage; 00068 pic_param->vol_fields.bits.sprite_warping_accuracy = s->sprite_warping_accuracy; 00069 pic_param->vol_fields.bits.quant_type = s->mpeg_quant; 00070 pic_param->vol_fields.bits.quarter_sample = s->quarter_sample; 00071 pic_param->vol_fields.bits.data_partitioned = s->data_partitioning; 00072 pic_param->vol_fields.bits.reversible_vlc = s->rvlc; 00073 pic_param->vol_fields.bits.resync_marker_disable = !s->resync_marker; 00074 pic_param->no_of_sprite_warping_points = s->num_sprite_warping_points; 00075 for (i = 0; i < s->num_sprite_warping_points && i < 3; i++) { 00076 pic_param->sprite_trajectory_du[i] = s->sprite_traj[i][0]; 00077 pic_param->sprite_trajectory_dv[i] = s->sprite_traj[i][1]; 00078 } 00079 pic_param->quant_precision = s->quant_precision; 00080 pic_param->vop_fields.value = 0; /* reset all bits */ 00081 pic_param->vop_fields.bits.vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I; 00082 pic_param->vop_fields.bits.backward_reference_vop_coding_type = s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.pict_type - AV_PICTURE_TYPE_I : 0; 00083 pic_param->vop_fields.bits.vop_rounding_type = s->no_rounding; 00084 pic_param->vop_fields.bits.intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(s); 00085 pic_param->vop_fields.bits.top_field_first = s->top_field_first; 00086 pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan; 00087 pic_param->vop_fcode_forward = s->f_code; 00088 pic_param->vop_fcode_backward = s->b_code; 00089 pic_param->vop_time_increment_resolution = avctx->time_base.den; 00090 pic_param->num_macroblocks_in_gob = s->mb_width * ff_h263_get_gob_height(s); 00091 pic_param->num_gobs_in_vop = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob; 00092 pic_param->TRB = s->pb_time; 00093 pic_param->TRD = s->pp_time; 00094 00095 if (s->pict_type == AV_PICTURE_TYPE_B) 00096 pic_param->backward_reference_picture = ff_vaapi_get_surface_id(&s->next_picture); 00097 if (s->pict_type != AV_PICTURE_TYPE_I) 00098 pic_param->forward_reference_picture = ff_vaapi_get_surface_id(&s->last_picture); 00099 00100 /* Fill in VAIQMatrixBufferMPEG4 */ 00101 /* Only the first inverse quantisation method uses the weighthing matrices */ 00102 if (pic_param->vol_fields.bits.quant_type) { 00103 iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4)); 00104 if (!iq_matrix) 00105 return -1; 00106 iq_matrix->load_intra_quant_mat = 1; 00107 iq_matrix->load_non_intra_quant_mat = 1; 00108 00109 for (i = 0; i < 64; i++) { 00110 int n = s->dsp.idct_permutation[ff_zigzag_direct[i]]; 00111 iq_matrix->intra_quant_mat[i] = s->intra_matrix[n]; 00112 iq_matrix->non_intra_quant_mat[i] = s->inter_matrix[n]; 00113 } 00114 } 00115 return 0; 00116 } 00117 00118 static int vaapi_mpeg4_end_frame(AVCodecContext *avctx) 00119 { 00120 return ff_vaapi_common_end_frame(avctx->priv_data); 00121 } 00122 00123 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) 00124 { 00125 MpegEncContext * const s = avctx->priv_data; 00126 VASliceParameterBufferMPEG4 *slice_param; 00127 00128 av_dlog(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size); 00129 00130 /* video_plane_with_short_video_header() contains all GOBs 00131 * in-order, and this is what VA API (Intel backend) expects: only 00132 * a single slice param. So fake macroblock_number for Libav so 00133 * that we don't call vaapi_mpeg4_decode_slice() again 00134 */ 00135 if (avctx->codec->id == CODEC_ID_H263) 00136 size = s->gb.buffer_end - buffer; 00137 00138 /* Fill in VASliceParameterBufferMPEG4 */ 00139 slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size); 00140 if (!slice_param) 00141 return -1; 00142 slice_param->macroblock_offset = get_bits_count(&s->gb) % 8; 00143 slice_param->macroblock_number = s->mb_y * s->mb_width + s->mb_x; 00144 slice_param->quant_scale = s->qscale; 00145 00146 if (avctx->codec->id == CODEC_ID_H263) 00147 s->mb_y = s->mb_height; 00148 00149 return 0; 00150 } 00151 00152 #if CONFIG_MPEG4_VAAPI_HWACCEL 00153 AVHWAccel ff_mpeg4_vaapi_hwaccel = { 00154 .name = "mpeg4_vaapi", 00155 .type = AVMEDIA_TYPE_VIDEO, 00156 .id = CODEC_ID_MPEG4, 00157 .pix_fmt = PIX_FMT_VAAPI_VLD, 00158 .capabilities = 0, 00159 .start_frame = vaapi_mpeg4_start_frame, 00160 .end_frame = vaapi_mpeg4_end_frame, 00161 .decode_slice = vaapi_mpeg4_decode_slice, 00162 .priv_data_size = 0, 00163 }; 00164 #endif 00165 00166 #if CONFIG_H263_VAAPI_HWACCEL 00167 AVHWAccel ff_h263_vaapi_hwaccel = { 00168 .name = "h263_vaapi", 00169 .type = AVMEDIA_TYPE_VIDEO, 00170 .id = CODEC_ID_H263, 00171 .pix_fmt = PIX_FMT_VAAPI_VLD, 00172 .capabilities = 0, 00173 .start_frame = vaapi_mpeg4_start_frame, 00174 .end_frame = vaapi_mpeg4_end_frame, 00175 .decode_slice = vaapi_mpeg4_decode_slice, 00176 .priv_data_size = 0, 00177 }; 00178 #endif