Libav
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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 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 00026 static int mpeg4_get_intra_dc_vlc_thr(MpegEncContext *s) 00027 { 00028 switch (s->intra_dc_threshold) { 00029 case 99: return 0; 00030 case 13: return 1; 00031 case 15: return 2; 00032 case 17: return 3; 00033 case 19: return 4; 00034 case 21: return 5; 00035 case 23: return 6; 00036 case 0: return 7; 00037 } 00038 return 0; 00039 } 00040 00041 static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size) 00042 { 00043 MpegEncContext * const s = avctx->priv_data; 00044 struct vaapi_context * const vactx = avctx->hwaccel_context; 00045 VAPictureParameterBufferMPEG4 *pic_param; 00046 VAIQMatrixBufferMPEG4 *iq_matrix; 00047 int i; 00048 00049 dprintf(avctx, "vaapi_mpeg4_start_frame()\n"); 00050 00051 vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4); 00052 00053 /* Fill in VAPictureParameterBufferMPEG4 */ 00054 pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG4)); 00055 if (!pic_param) 00056 return -1; 00057 pic_param->vop_width = s->width; 00058 pic_param->vop_height = s->height; 00059 pic_param->forward_reference_picture = VA_INVALID_ID; 00060 pic_param->backward_reference_picture = VA_INVALID_ID; 00061 pic_param->vol_fields.value = 0; /* reset all bits */ 00062 pic_param->vol_fields.bits.short_video_header = avctx->codec->id == CODEC_ID_H263; 00063 pic_param->vol_fields.bits.chroma_format = CHROMA_420; 00064 pic_param->vol_fields.bits.interlaced = !s->progressive_sequence; 00065 pic_param->vol_fields.bits.obmc_disable = 1; 00066 pic_param->vol_fields.bits.sprite_enable = s->vol_sprite_usage; 00067 pic_param->vol_fields.bits.sprite_warping_accuracy = s->sprite_warping_accuracy; 00068 pic_param->vol_fields.bits.quant_type = s->mpeg_quant; 00069 pic_param->vol_fields.bits.quarter_sample = s->quarter_sample; 00070 pic_param->vol_fields.bits.data_partitioned = s->data_partitioning; 00071 pic_param->vol_fields.bits.reversible_vlc = s->rvlc; 00072 pic_param->vol_fields.bits.resync_marker_disable = !s->resync_marker; 00073 pic_param->no_of_sprite_warping_points = s->num_sprite_warping_points; 00074 for (i = 0; i < s->num_sprite_warping_points && i < 3; i++) { 00075 pic_param->sprite_trajectory_du[i] = s->sprite_traj[i][0]; 00076 pic_param->sprite_trajectory_dv[i] = s->sprite_traj[i][1]; 00077 } 00078 pic_param->quant_precision = s->quant_precision; 00079 pic_param->vop_fields.value = 0; /* reset all bits */ 00080 pic_param->vop_fields.bits.vop_coding_type = s->pict_type - FF_I_TYPE; 00081 pic_param->vop_fields.bits.backward_reference_vop_coding_type = s->pict_type == FF_B_TYPE ? s->next_picture.pict_type - FF_I_TYPE : 0; 00082 pic_param->vop_fields.bits.vop_rounding_type = s->no_rounding; 00083 pic_param->vop_fields.bits.intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(s); 00084 pic_param->vop_fields.bits.top_field_first = s->top_field_first; 00085 pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan; 00086 pic_param->vop_fcode_forward = s->f_code; 00087 pic_param->vop_fcode_backward = s->b_code; 00088 pic_param->vop_time_increment_resolution = avctx->time_base.den; 00089 pic_param->num_macroblocks_in_gob = s->mb_width * ff_h263_get_gob_height(s); 00090 pic_param->num_gobs_in_vop = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob; 00091 pic_param->TRB = s->pb_time; 00092 pic_param->TRD = s->pp_time; 00093 00094 if (s->pict_type == FF_B_TYPE) 00095 pic_param->backward_reference_picture = ff_vaapi_get_surface_id(&s->next_picture); 00096 if (s->pict_type != FF_I_TYPE) 00097 pic_param->forward_reference_picture = ff_vaapi_get_surface_id(&s->last_picture); 00098 00099 /* Fill in VAIQMatrixBufferMPEG4 */ 00100 /* Only the first inverse quantisation method uses the weighthing matrices */ 00101 if (pic_param->vol_fields.bits.quant_type) { 00102 iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4)); 00103 if (!iq_matrix) 00104 return -1; 00105 iq_matrix->load_intra_quant_mat = 1; 00106 iq_matrix->load_non_intra_quant_mat = 1; 00107 00108 for (i = 0; i < 64; i++) { 00109 int n = s->dsp.idct_permutation[ff_zigzag_direct[i]]; 00110 iq_matrix->intra_quant_mat[i] = s->intra_matrix[n]; 00111 iq_matrix->non_intra_quant_mat[i] = s->inter_matrix[n]; 00112 } 00113 } 00114 return 0; 00115 } 00116 00117 static int vaapi_mpeg4_end_frame(AVCodecContext *avctx) 00118 { 00119 return ff_vaapi_common_end_frame(avctx->priv_data); 00120 } 00121 00122 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) 00123 { 00124 MpegEncContext * const s = avctx->priv_data; 00125 VASliceParameterBufferMPEG4 *slice_param; 00126 00127 dprintf(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size); 00128 00129 /* video_plane_with_short_video_header() contains all GOBs 00130 * in-order, and this is what VA API (Intel backend) expects: only 00131 * a single slice param. So fake macroblock_number for FFmpeg so 00132 * that we don't call vaapi_mpeg4_decode_slice() again 00133 */ 00134 if (avctx->codec->id == CODEC_ID_H263) 00135 size = s->gb.buffer_end - buffer; 00136 00137 /* Fill in VASliceParameterBufferMPEG4 */ 00138 slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size); 00139 if (!slice_param) 00140 return -1; 00141 slice_param->macroblock_offset = get_bits_count(&s->gb) % 8; 00142 slice_param->macroblock_number = s->mb_y * s->mb_width + s->mb_x; 00143 slice_param->quant_scale = s->qscale; 00144 00145 if (avctx->codec->id == CODEC_ID_H263) 00146 s->mb_y = s->mb_height; 00147 00148 return 0; 00149 } 00150 00151 #if CONFIG_MPEG4_VAAPI_HWACCEL 00152 AVHWAccel mpeg4_vaapi_hwaccel = { 00153 .name = "mpeg4_vaapi", 00154 .type = AVMEDIA_TYPE_VIDEO, 00155 .id = CODEC_ID_MPEG4, 00156 .pix_fmt = PIX_FMT_VAAPI_VLD, 00157 .capabilities = 0, 00158 .start_frame = vaapi_mpeg4_start_frame, 00159 .end_frame = vaapi_mpeg4_end_frame, 00160 .decode_slice = vaapi_mpeg4_decode_slice, 00161 .priv_data_size = 0, 00162 }; 00163 #endif 00164 00165 #if CONFIG_H263_VAAPI_HWACCEL 00166 AVHWAccel h263_vaapi_hwaccel = { 00167 .name = "h263_vaapi", 00168 .type = AVMEDIA_TYPE_VIDEO, 00169 .id = CODEC_ID_H263, 00170 .pix_fmt = PIX_FMT_VAAPI_VLD, 00171 .capabilities = 0, 00172 .start_frame = vaapi_mpeg4_start_frame, 00173 .end_frame = vaapi_mpeg4_end_frame, 00174 .decode_slice = vaapi_mpeg4_decode_slice, 00175 .priv_data_size = 0, 00176 }; 00177 #endif