1/* 2 * MPEG-4 / H.263 HW decode acceleration through VA API 3 * 4 * Copyright (C) 2008-2009 Splitted-Desktop Systems 5 * 6 * This file is part of Libav. 7 * 8 * Libav is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * Libav is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with Libav; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23#include "vaapi_internal.h" 24#include "h263.h" 25 26/** Reconstruct bitstream intra_dc_vlc_thr */ 27static int mpeg4_get_intra_dc_vlc_thr(MpegEncContext *s) 28{ 29 switch (s->intra_dc_threshold) { 30 case 99: return 0; 31 case 13: return 1; 32 case 15: return 2; 33 case 17: return 3; 34 case 19: return 4; 35 case 21: return 5; 36 case 23: return 6; 37 case 0: return 7; 38 } 39 return 0; 40} 41 42static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size) 43{ 44 MpegEncContext * const s = avctx->priv_data; 45 struct vaapi_context * const vactx = avctx->hwaccel_context; 46 VAPictureParameterBufferMPEG4 *pic_param; 47 VAIQMatrixBufferMPEG4 *iq_matrix; 48 int i; 49 50 av_dlog(avctx, "vaapi_mpeg4_start_frame()\n"); 51 52 vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4); 53 54 /* Fill in VAPictureParameterBufferMPEG4 */ 55 pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG4)); 56 if (!pic_param) 57 return -1; 58 pic_param->vop_width = s->width; 59 pic_param->vop_height = s->height; 60 pic_param->forward_reference_picture = VA_INVALID_ID; 61 pic_param->backward_reference_picture = VA_INVALID_ID; 62 pic_param->vol_fields.value = 0; /* reset all bits */ 63 pic_param->vol_fields.bits.short_video_header = avctx->codec->id == CODEC_ID_H263; 64 pic_param->vol_fields.bits.chroma_format = CHROMA_420; 65 pic_param->vol_fields.bits.interlaced = !s->progressive_sequence; 66 pic_param->vol_fields.bits.obmc_disable = 1; 67 pic_param->vol_fields.bits.sprite_enable = s->vol_sprite_usage; 68 pic_param->vol_fields.bits.sprite_warping_accuracy = s->sprite_warping_accuracy; 69 pic_param->vol_fields.bits.quant_type = s->mpeg_quant; 70 pic_param->vol_fields.bits.quarter_sample = s->quarter_sample; 71 pic_param->vol_fields.bits.data_partitioned = s->data_partitioning; 72 pic_param->vol_fields.bits.reversible_vlc = s->rvlc; 73 pic_param->vol_fields.bits.resync_marker_disable = !s->resync_marker; 74 pic_param->no_of_sprite_warping_points = s->num_sprite_warping_points; 75 for (i = 0; i < s->num_sprite_warping_points && i < 3; i++) { 76 pic_param->sprite_trajectory_du[i] = s->sprite_traj[i][0]; 77 pic_param->sprite_trajectory_dv[i] = s->sprite_traj[i][1]; 78 } 79 pic_param->quant_precision = s->quant_precision; 80 pic_param->vop_fields.value = 0; /* reset all bits */ 81 pic_param->vop_fields.bits.vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I; 82 pic_param->vop_fields.bits.backward_reference_vop_coding_type = s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f.pict_type - AV_PICTURE_TYPE_I : 0; 83 pic_param->vop_fields.bits.vop_rounding_type = s->no_rounding; 84 pic_param->vop_fields.bits.intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(s); 85 pic_param->vop_fields.bits.top_field_first = s->top_field_first; 86 pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan; 87 pic_param->vop_fcode_forward = s->f_code; 88 pic_param->vop_fcode_backward = s->b_code; 89 pic_param->vop_time_increment_resolution = avctx->time_base.den; 90 pic_param->num_macroblocks_in_gob = s->mb_width * ff_h263_get_gob_height(s); 91 pic_param->num_gobs_in_vop = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob; 92 pic_param->TRB = s->pb_time; 93 pic_param->TRD = s->pp_time; 94 95 if (s->pict_type == AV_PICTURE_TYPE_B) 96 pic_param->backward_reference_picture = ff_vaapi_get_surface_id(&s->next_picture); 97 if (s->pict_type != AV_PICTURE_TYPE_I) 98 pic_param->forward_reference_picture = ff_vaapi_get_surface_id(&s->last_picture); 99 100 /* Fill in VAIQMatrixBufferMPEG4 */ 101 /* Only the first inverse quantisation method uses the weighting matrices */ 102 if (pic_param->vol_fields.bits.quant_type) { 103 iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4)); 104 if (!iq_matrix) 105 return -1; 106 iq_matrix->load_intra_quant_mat = 1; 107 iq_matrix->load_non_intra_quant_mat = 1; 108 109 for (i = 0; i < 64; i++) { 110 int n = s->dsp.idct_permutation[ff_zigzag_direct[i]]; 111 iq_matrix->intra_quant_mat[i] = s->intra_matrix[n]; 112 iq_matrix->non_intra_quant_mat[i] = s->inter_matrix[n]; 113 } 114 } 115 return 0; 116} 117 118static int vaapi_mpeg4_end_frame(AVCodecContext *avctx) 119{ 120 return ff_vaapi_common_end_frame(avctx->priv_data); 121} 122 123static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) 124{ 125 MpegEncContext * const s = avctx->priv_data; 126 VASliceParameterBufferMPEG4 *slice_param; 127 128 av_dlog(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size); 129 130 /* video_plane_with_short_video_header() contains all GOBs 131 * in-order, and this is what VA API (Intel backend) expects: only 132 * a single slice param. So fake macroblock_number for Libav so 133 * that we don't call vaapi_mpeg4_decode_slice() again 134 */ 135 if (avctx->codec->id == CODEC_ID_H263) 136 size = s->gb.buffer_end - buffer; 137 138 /* Fill in VASliceParameterBufferMPEG4 */ 139 slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size); 140 if (!slice_param) 141 return -1; 142 slice_param->macroblock_offset = get_bits_count(&s->gb) % 8; 143 slice_param->macroblock_number = s->mb_y * s->mb_width + s->mb_x; 144 slice_param->quant_scale = s->qscale; 145 146 if (avctx->codec->id == CODEC_ID_H263) 147 s->mb_y = s->mb_height; 148 149 return 0; 150} 151 152#if CONFIG_MPEG4_VAAPI_HWACCEL 153AVHWAccel ff_mpeg4_vaapi_hwaccel = { 154 .name = "mpeg4_vaapi", 155 .type = AVMEDIA_TYPE_VIDEO, 156 .id = CODEC_ID_MPEG4, 157 .pix_fmt = PIX_FMT_VAAPI_VLD, 158 .start_frame = vaapi_mpeg4_start_frame, 159 .end_frame = vaapi_mpeg4_end_frame, 160 .decode_slice = vaapi_mpeg4_decode_slice, 161}; 162#endif 163 164#if CONFIG_H263_VAAPI_HWACCEL 165AVHWAccel ff_h263_vaapi_hwaccel = { 166 .name = "h263_vaapi", 167 .type = AVMEDIA_TYPE_VIDEO, 168 .id = CODEC_ID_H263, 169 .pix_fmt = PIX_FMT_VAAPI_VLD, 170 .start_frame = vaapi_mpeg4_start_frame, 171 .end_frame = vaapi_mpeg4_end_frame, 172 .decode_slice = vaapi_mpeg4_decode_slice, 173}; 174#endif 175