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 "config_components.h"
  24
  25 #include "h263.h"
  26 #include "hwconfig.h"
  27 #include "mpeg4videodec.h"
  28 #include "mpegvideo.h"
  29 #include "mpegvideodec.h"
  30 #include "vaapi_decode.h"
  31
  32 /** Reconstruct bitstream intra_dc_vlc_thr */
  33 static int mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext *s)
  34 {
  35     switch (s->intra_dc_threshold) {
  36     case 99: return 0;
  37     case 13: return 1;
  38     case 15: return 2;
  39     case 17: return 3;
  40     case 19: return 4;
  41     case 21: return 5;
  42     case 23: return 6;
  43     case 0:  return 7;
  44     }
  45     return 0;
  46 }
  47
  48 static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
  49 {
  50     Mpeg4DecContext *ctx = avctx->priv_data;
  51     MpegEncContext *s = &ctx->m;
  52     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
  53     VAPictureParameterBufferMPEG4 pic_param;
  54     int i, err;
  55
  56     pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);
  57
  58     pic_param = (VAPictureParameterBufferMPEG4) {
  59         .vop_width                        = s->width,
  60         .vop_height                       = s->height,
  61         .forward_reference_picture        = VA_INVALID_ID,
  62         .backward_reference_picture       = VA_INVALID_ID,
  63         .vol_fields.bits = {
  64             .short_video_header           = avctx->codec->id == AV_CODEC_ID_H263,
  65             .chroma_format                = CHROMA_420,
  66             .interlaced                   = !s->progressive_sequence,
  67             .obmc_disable                 = 1,
  68             .sprite_enable                = ctx->vol_sprite_usage,
  69             .sprite_warping_accuracy      = s->sprite_warping_accuracy,
  70             .quant_type                   = s->mpeg_quant,
  71             .quarter_sample               = s->quarter_sample,
  72             .data_partitioned             = s->data_partitioning,
  73             .reversible_vlc               = ctx->rvlc,
  74             .resync_marker_disable        = !ctx->resync_marker,
  75         },
  76         .no_of_sprite_warping_points      = ctx->num_sprite_warping_points,
  77         .quant_precision                  = s->quant_precision,
  78         .vop_fields.bits = {
  79             .vop_coding_type              = s->pict_type - AV_PICTURE_TYPE_I,
  80             .backward_reference_vop_coding_type =
  81                 s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f->pict_type - AV_PICTURE_TYPE_I : 0,
  82             .vop_rounding_type            = s->no_rounding,
  83             .intra_dc_vlc_thr             = mpeg4_get_intra_dc_vlc_thr(ctx),
  84             .top_field_first              = s->top_field_first,
  85             .alternate_vertical_scan_flag = s->alternate_scan,
  86         },
  87         .vop_fcode_forward                = s->f_code,
  88         .vop_fcode_backward               = s->b_code,
  89         .vop_time_increment_resolution    = avctx->framerate.num,
  90         .num_macroblocks_in_gob           = s->mb_width * H263_GOB_HEIGHT(s->height),
  91         .num_gobs_in_vop                  =
  92             (s->mb_width * s->mb_height) / (s->mb_width * H263_GOB_HEIGHT(s->height)),
  93         .TRB                              = s->pb_time,
  94         .TRD                              = s->pp_time,
  95     };
  96
  97     for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
  98         pic_param.sprite_trajectory_du[i]              = ctx->sprite_traj[i][0];
  99         pic_param.sprite_trajectory_dv[i]              = ctx->sprite_traj[i][1];
 100     }
 101
 102     if (s->pict_type == AV_PICTURE_TYPE_B)
 103         pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
 104     if (s->pict_type != AV_PICTURE_TYPE_I)
 105         pic_param.forward_reference_picture  = ff_vaapi_get_surface_id(s->last_picture.f);
 106
 107     err = ff_vaapi_decode_make_param_buffer(avctx, pic,
 108                                             VAPictureParameterBufferType,
 109                                             &pic_param, sizeof(pic_param));
 110     if (err < 0)
 111         goto fail;
 112
 113     /* Only the first inverse quantisation method uses the weighting matrices */
 114     if (pic_param.vol_fields.bits.quant_type) {
 115         VAIQMatrixBufferMPEG4 iq_matrix;
 116
 117         iq_matrix.load_intra_quant_mat     = 1;
 118         iq_matrix.load_non_intra_quant_mat = 1;
 119
 120         for (i = 0; i < 64; i++) {
 121             int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
 122             iq_matrix.intra_quant_mat[i]     = s->intra_matrix[n];
 123             iq_matrix.non_intra_quant_mat[i] = s->inter_matrix[n];
 124         }
 125
 126         err = ff_vaapi_decode_make_param_buffer(avctx, pic,
 127                                                 VAIQMatrixBufferType,
 128                                                 &iq_matrix, sizeof(iq_matrix));
 129         if (err < 0)
 130             goto fail;
 131     }
 132     return 0;
 133
 134 fail:
 135     ff_vaapi_decode_cancel(avctx, pic);
 136     return err;
 137 }
 138
 139 static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
 140 {
 141     MpegEncContext *s = avctx->priv_data;
 142     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
 143     int ret;
 144
 145     ret = ff_vaapi_decode_issue(avctx, pic);
 146     if (ret < 0)
 147         goto fail;
 148
 149     ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);
 150
 151 fail:
 152     return ret;
 153 }
 154
 155 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
 156 {
 157     MpegEncContext *s = avctx->priv_data;
 158     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
 159     VASliceParameterBufferMPEG4 slice_param;
 160     int err;
 161
 162     slice_param = (VASliceParameterBufferMPEG4) {
 163         .slice_data_size   = size,
 164         .slice_data_offset = 0,
 165         .slice_data_flag   = VA_SLICE_DATA_FLAG_ALL,
 166         .macroblock_offset = get_bits_count(&s->gb) % 8,
 167         .macroblock_number = 0,
 168         .quant_scale       = s->qscale,
 169     };
 170
 171     err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
 172                                             &slice_param, sizeof(slice_param),
 173                                             buffer, size);
 174     if (err < 0) {
 175         ff_vaapi_decode_cancel(avctx, pic);
 176         return err;
 177     }
 178
 179     return 0;
 180 }
 181
 182 #if CONFIG_MPEG4_VAAPI_HWACCEL
 183 const AVHWAccel ff_mpeg4_vaapi_hwaccel = {
 184     .name                 = "mpeg4_vaapi",
 185     .type                 = AVMEDIA_TYPE_VIDEO,
 186     .id                   = AV_CODEC_ID_MPEG4,
 187     .pix_fmt              = AV_PIX_FMT_VAAPI,
 188     .start_frame          = &vaapi_mpeg4_start_frame,
 189     .end_frame            = &vaapi_mpeg4_end_frame,
 190     .decode_slice         = &vaapi_mpeg4_decode_slice,
 191     .frame_priv_data_size = sizeof(VAAPIDecodePicture),
 192     .init                 = &ff_vaapi_decode_init,
 193     .uninit               = &ff_vaapi_decode_uninit,
 194     .frame_params         = &ff_vaapi_common_frame_params,
 195     .priv_data_size       = sizeof(VAAPIDecodeContext),
 196     .caps_internal        = HWACCEL_CAP_ASYNC_SAFE,
 197 };
 198 #endif
 199
 200 #if CONFIG_H263_VAAPI_HWACCEL
 201 const AVHWAccel ff_h263_vaapi_hwaccel = {
 202     .name                 = "h263_vaapi",
 203     .type                 = AVMEDIA_TYPE_VIDEO,
 204     .id                   = AV_CODEC_ID_H263,
 205     .pix_fmt              = AV_PIX_FMT_VAAPI,
 206     .start_frame          = &vaapi_mpeg4_start_frame,
 207     .end_frame            = &vaapi_mpeg4_end_frame,
 208     .decode_slice         = &vaapi_mpeg4_decode_slice,
 209     .frame_priv_data_size = sizeof(VAAPIDecodePicture),
 210     .init                 = &ff_vaapi_decode_init,
 211     .uninit               = &ff_vaapi_decode_uninit,
 212     .frame_params         = &ff_vaapi_common_frame_params,
 213     .priv_data_size       = sizeof(VAAPIDecodeContext),
 214     .caps_internal        = HWACCEL_CAP_ASYNC_SAFE,
 215 };
 216 #endif