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 FFmpeg. 7 * 8 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 25/** Reconstruct bitstream intra_dc_vlc_thr */ 26static int mpeg4_get_intra_dc_vlc_thr(MpegEncContext *s) 27{ 28 switch (s->intra_dc_threshold) { 29 case 99: return 0; 30 case 13: return 1; 31 case 15: return 2; 32 case 17: return 3; 33 case 19: return 4; 34 case 21: return 5; 35 case 23: return 6; 36 case 0: return 7; 37 } 38 return 0; 39} 40 41static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size) 42{ 43 MpegEncContext * const s = avctx->priv_data; 44 struct vaapi_context * const vactx = avctx->hwaccel_context; 45 VAPictureParameterBufferMPEG4 *pic_param; 46 VAIQMatrixBufferMPEG4 *iq_matrix; 47 int i; 48 49 dprintf(avctx, "vaapi_mpeg4_start_frame()\n"); 50 51 vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4); 52 53 /* Fill in VAPictureParameterBufferMPEG4 */ 54 pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG4)); 55 if (!pic_param) 56 return -1; 57 pic_param->vop_width = s->width; 58 pic_param->vop_height = s->height; 59 pic_param->forward_reference_picture = VA_INVALID_ID; 60 pic_param->backward_reference_picture = VA_INVALID_ID; 61 pic_param->vol_fields.value = 0; /* reset all bits */ 62 pic_param->vol_fields.bits.short_video_header = avctx->codec->id == CODEC_ID_H263; 63 pic_param->vol_fields.bits.chroma_format = CHROMA_420; 64 pic_param->vol_fields.bits.interlaced = !s->progressive_sequence; 65 pic_param->vol_fields.bits.obmc_disable = 1; 66 pic_param->vol_fields.bits.sprite_enable = s->vol_sprite_usage; 67 pic_param->vol_fields.bits.sprite_warping_accuracy = s->sprite_warping_accuracy; 68 pic_param->vol_fields.bits.quant_type = s->mpeg_quant; 69 pic_param->vol_fields.bits.quarter_sample = s->quarter_sample; 70 pic_param->vol_fields.bits.data_partitioned = s->data_partitioning; 71 pic_param->vol_fields.bits.reversible_vlc = s->rvlc; 72 pic_param->vol_fields.bits.resync_marker_disable = !s->resync_marker; 73 pic_param->no_of_sprite_warping_points = s->num_sprite_warping_points; 74 for (i = 0; i < s->num_sprite_warping_points && i < 3; i++) { 75 pic_param->sprite_trajectory_du[i] = s->sprite_traj[i][0]; 76 pic_param->sprite_trajectory_dv[i] = s->sprite_traj[i][1]; 77 } 78 pic_param->quant_precision = s->quant_precision; 79 pic_param->vop_fields.value = 0; /* reset all bits */ 80 pic_param->vop_fields.bits.vop_coding_type = s->pict_type - FF_I_TYPE; 81 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; 82 pic_param->vop_fields.bits.vop_rounding_type = s->no_rounding; 83 pic_param->vop_fields.bits.intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(s); 84 pic_param->vop_fields.bits.top_field_first = s->top_field_first; 85 pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan; 86 pic_param->vop_fcode_forward = s->f_code; 87 pic_param->vop_fcode_backward = s->b_code; 88 pic_param->vop_time_increment_resolution = avctx->time_base.den; 89 pic_param->num_macroblocks_in_gob = s->mb_width * ff_h263_get_gob_height(s); 90 pic_param->num_gobs_in_vop = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob; 91 pic_param->TRB = s->pb_time; 92 pic_param->TRD = s->pp_time; 93 94 if (s->pict_type == FF_B_TYPE) 95 pic_param->backward_reference_picture = ff_vaapi_get_surface_id(&s->next_picture); 96 if (s->pict_type != FF_I_TYPE) 97 pic_param->forward_reference_picture = ff_vaapi_get_surface_id(&s->last_picture); 98 99 /* Fill in VAIQMatrixBufferMPEG4 */ 100 /* Only the first inverse quantisation method uses the weighthing matrices */ 101 if (pic_param->vol_fields.bits.quant_type) { 102 iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4)); 103 if (!iq_matrix) 104 return -1; 105 iq_matrix->load_intra_quant_mat = 1; 106 iq_matrix->load_non_intra_quant_mat = 1; 107 108 for (i = 0; i < 64; i++) { 109 int n = s->dsp.idct_permutation[ff_zigzag_direct[i]]; 110 iq_matrix->intra_quant_mat[i] = s->intra_matrix[n]; 111 iq_matrix->non_intra_quant_mat[i] = s->inter_matrix[n]; 112 } 113 } 114 return 0; 115} 116 117static int vaapi_mpeg4_end_frame(AVCodecContext *avctx) 118{ 119 return ff_vaapi_common_end_frame(avctx->priv_data); 120} 121 122static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) 123{ 124 MpegEncContext * const s = avctx->priv_data; 125 VASliceParameterBufferMPEG4 *slice_param; 126 127 dprintf(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size); 128 129 /* video_plane_with_short_video_header() contains all GOBs 130 * in-order, and this is what VA API (Intel backend) expects: only 131 * a single slice param. So fake macroblock_number for FFmpeg so 132 * that we don't call vaapi_mpeg4_decode_slice() again 133 */ 134 if (avctx->codec->id == CODEC_ID_H263) 135 size = s->gb.buffer_end - buffer; 136 137 /* Fill in VASliceParameterBufferMPEG4 */ 138 slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size); 139 if (!slice_param) 140 return -1; 141 slice_param->macroblock_offset = get_bits_count(&s->gb) % 8; 142 slice_param->macroblock_number = s->mb_y * s->mb_width + s->mb_x; 143 slice_param->quant_scale = s->qscale; 144 145 if (avctx->codec->id == CODEC_ID_H263) 146 s->mb_y = s->mb_height; 147 148 return 0; 149} 150 151#if CONFIG_MPEG4_VAAPI_HWACCEL 152AVHWAccel mpeg4_vaapi_hwaccel = { 153 .name = "mpeg4_vaapi", 154 .type = AVMEDIA_TYPE_VIDEO, 155 .id = CODEC_ID_MPEG4, 156 .pix_fmt = PIX_FMT_VAAPI_VLD, 157 .capabilities = 0, 158 .start_frame = vaapi_mpeg4_start_frame, 159 .end_frame = vaapi_mpeg4_end_frame, 160 .decode_slice = vaapi_mpeg4_decode_slice, 161 .priv_data_size = 0, 162}; 163#endif 164 165#if CONFIG_H263_VAAPI_HWACCEL 166AVHWAccel h263_vaapi_hwaccel = { 167 .name = "h263_vaapi", 168 .type = AVMEDIA_TYPE_VIDEO, 169 .id = CODEC_ID_H263, 170 .pix_fmt = PIX_FMT_VAAPI_VLD, 171 .capabilities = 0, 172 .start_frame = vaapi_mpeg4_start_frame, 173 .end_frame = vaapi_mpeg4_end_frame, 174 .decode_slice = vaapi_mpeg4_decode_slice, 175 .priv_data_size = 0, 176}; 177#endif 178