git.sesse.net Git - ffmpeg/blob - libavcodec/vaapi_mpeg4.c

   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 #include "internal.h"
  25 #include "h263.h"
  26 #include "mpeg4video.h"
  27 #include "mpegvideo.h"
  28
  29 /** Reconstruct bitstream intra_dc_vlc_thr */
  30 static int mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext *s)
  31 {
  32     switch (s->intra_dc_threshold) {
  33     case 99: return 0;
  34     case 13: return 1;
  35     case 15: return 2;
  36     case 17: return 3;
  37     case 19: return 4;
  38     case 21: return 5;
  39     case 23: return 6;
  40     case 0:  return 7;
  41     }
  42     return 0;
  43 }
  44
  45 static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
  46 {
  47     Mpeg4DecContext *ctx = avctx->priv_data;
  48     MpegEncContext * const s = &ctx->m;
  49     FFVAContext * const vactx = ff_vaapi_get_context(avctx);
  50     VAPictureParameterBufferMPEG4 *pic_param;
  51     VAIQMatrixBufferMPEG4 *iq_matrix;
  52     int i;
  53
  54     ff_dlog(avctx, "vaapi_mpeg4_start_frame()\n");
  55
  56     vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4);
  57
  58     /* Fill in VAPictureParameterBufferMPEG4 */
  59     pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG4));
  60     if (!pic_param)
  61         return -1;
  62     pic_param->vop_width                                = s->width;
  63     pic_param->vop_height                               = s->height;
  64     pic_param->forward_reference_picture                = VA_INVALID_ID;
  65     pic_param->backward_reference_picture               = VA_INVALID_ID;
  66     pic_param->vol_fields.value                         = 0; /* reset all bits */
  67     pic_param->vol_fields.bits.short_video_header       = avctx->codec->id == AV_CODEC_ID_H263;
  68     pic_param->vol_fields.bits.chroma_format            = CHROMA_420;
  69     pic_param->vol_fields.bits.interlaced               = !s->progressive_sequence;
  70     pic_param->vol_fields.bits.obmc_disable             = 1;
  71     pic_param->vol_fields.bits.sprite_enable            = ctx->vol_sprite_usage;
  72     pic_param->vol_fields.bits.sprite_warping_accuracy  = s->sprite_warping_accuracy;
  73     pic_param->vol_fields.bits.quant_type               = s->mpeg_quant;
  74     pic_param->vol_fields.bits.quarter_sample           = s->quarter_sample;
  75     pic_param->vol_fields.bits.data_partitioned         = s->data_partitioning;
  76     pic_param->vol_fields.bits.reversible_vlc           = ctx->rvlc;
  77     pic_param->vol_fields.bits.resync_marker_disable    = !ctx->resync_marker;
  78     pic_param->no_of_sprite_warping_points              = ctx->num_sprite_warping_points;
  79     for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
  80         pic_param->sprite_trajectory_du[i]              = ctx->sprite_traj[i][0];
  81         pic_param->sprite_trajectory_dv[i]              = ctx->sprite_traj[i][1];
  82     }
  83     pic_param->quant_precision                          = s->quant_precision;
  84     pic_param->vop_fields.value                         = 0; /* reset all bits */
  85     pic_param->vop_fields.bits.vop_coding_type          = s->pict_type - AV_PICTURE_TYPE_I;
  86     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;
  87     pic_param->vop_fields.bits.vop_rounding_type        = s->no_rounding;
  88     pic_param->vop_fields.bits.intra_dc_vlc_thr         = mpeg4_get_intra_dc_vlc_thr(ctx);
  89     pic_param->vop_fields.bits.top_field_first          = s->top_field_first;
  90     pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan;
  91     pic_param->vop_fcode_forward                        = s->f_code;
  92     pic_param->vop_fcode_backward                       = s->b_code;
  93     pic_param->vop_time_increment_resolution            = avctx->framerate.num;
  94     pic_param->num_macroblocks_in_gob                   = s->mb_width * H263_GOB_HEIGHT(s->height);
  95     pic_param->num_gobs_in_vop                          = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob;
  96     pic_param->TRB                                      = s->pb_time;
  97     pic_param->TRD                                      = s->pp_time;
  98
  99     if (s->pict_type == AV_PICTURE_TYPE_B)
 100         pic_param->backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
 101     if (s->pict_type != AV_PICTURE_TYPE_I)
 102         pic_param->forward_reference_picture  = ff_vaapi_get_surface_id(s->last_picture.f);
 103
 104     /* Fill in VAIQMatrixBufferMPEG4 */
 105     /* Only the first inverse quantisation method uses the weighting matrices */
 106     if (pic_param->vol_fields.bits.quant_type) {
 107         iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4));
 108         if (!iq_matrix)
 109             return -1;
 110         iq_matrix->load_intra_quant_mat         = 1;
 111         iq_matrix->load_non_intra_quant_mat     = 1;
 112
 113         for (i = 0; i < 64; i++) {
 114             int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
 115             iq_matrix->intra_quant_mat[i]       = s->intra_matrix[n];
 116             iq_matrix->non_intra_quant_mat[i]   = s->inter_matrix[n];
 117         }
 118     }
 119     return 0;
 120 }
 121
 122 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
 123 {
 124     MpegEncContext * const s = avctx->priv_data;
 125     FFVAContext * const vactx = ff_vaapi_get_context(avctx);
 126     VASliceParameterBufferMPEG4 *slice_param;
 127
 128     ff_dlog(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size);
 129
 130     /* Fill in VASliceParameterBufferMPEG4 */
 131     slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(vactx, buffer, size);
 132     if (!slice_param)
 133         return -1;
 134     slice_param->macroblock_offset      = get_bits_count(&s->gb) % 8;
 135     slice_param->macroblock_number      = 0;
 136     slice_param->quant_scale            = s->qscale;
 137
 138     return 0;
 139 }
 140
 141 #if CONFIG_MPEG4_VAAPI_HWACCEL
 142 AVHWAccel ff_mpeg4_vaapi_hwaccel = {
 143     .name           = "mpeg4_vaapi",
 144     .type           = AVMEDIA_TYPE_VIDEO,
 145     .id             = AV_CODEC_ID_MPEG4,
 146     .pix_fmt        = AV_PIX_FMT_VAAPI,
 147     .start_frame    = vaapi_mpeg4_start_frame,
 148     .end_frame      = ff_vaapi_mpeg_end_frame,
 149     .decode_slice   = vaapi_mpeg4_decode_slice,
 150     .init           = ff_vaapi_context_init,
 151     .uninit         = ff_vaapi_context_fini,
 152     .priv_data_size = sizeof(FFVAContext),
 153 };
 154 #endif
 155
 156 #if CONFIG_H263_VAAPI_HWACCEL
 157 AVHWAccel ff_h263_vaapi_hwaccel = {
 158     .name           = "h263_vaapi",
 159     .type           = AVMEDIA_TYPE_VIDEO,
 160     .id             = AV_CODEC_ID_H263,
 161     .pix_fmt        = AV_PIX_FMT_VAAPI,
 162     .start_frame    = vaapi_mpeg4_start_frame,
 163     .end_frame      = ff_vaapi_mpeg_end_frame,
 164     .decode_slice   = vaapi_mpeg4_decode_slice,
 165     .init           = ff_vaapi_context_init,
 166     .uninit         = ff_vaapi_context_fini,
 167     .priv_data_size = sizeof(FFVAContext),
 168 };
 169 #endif