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 "h263.h"
  24 #include "internal.h"
  25 #include "mpeg4video.h"
  26 #include "mpegvideo.h"
  27 #include "vaapi_decode.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 *s = &ctx->m;
  49     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
  50     VAPictureParameterBufferMPEG4 pic_param;
  51     int i, err;
  52
  53     pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);
  54
  55     pic_param = (VAPictureParameterBufferMPEG4) {
  56         .vop_width                        = s->width,
  57         .vop_height                       = s->height,
  58         .forward_reference_picture        = VA_INVALID_ID,
  59         .backward_reference_picture       = VA_INVALID_ID,
  60         .vol_fields.bits = {
  61             .short_video_header           = avctx->codec->id == AV_CODEC_ID_H263,
  62             .chroma_format                = CHROMA_420,
  63             .interlaced                   = !s->progressive_sequence,
  64             .obmc_disable                 = 1,
  65             .sprite_enable                = ctx->vol_sprite_usage,
  66             .sprite_warping_accuracy      = s->sprite_warping_accuracy,
  67             .quant_type                   = s->mpeg_quant,
  68             .quarter_sample               = s->quarter_sample,
  69             .data_partitioned             = s->data_partitioning,
  70             .reversible_vlc               = ctx->rvlc,
  71             .resync_marker_disable        = !ctx->resync_marker,
  72         },
  73         .no_of_sprite_warping_points      = ctx->num_sprite_warping_points,
  74         .quant_precision                  = s->quant_precision,
  75         .vop_fields.bits = {
  76             .vop_coding_type              = s->pict_type - AV_PICTURE_TYPE_I,
  77             .backward_reference_vop_coding_type =
  78                 s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f->pict_type - AV_PICTURE_TYPE_I : 0,
  79             .vop_rounding_type            = s->no_rounding,
  80             .intra_dc_vlc_thr             = mpeg4_get_intra_dc_vlc_thr(ctx),
  81             .top_field_first              = s->top_field_first,
  82             .alternate_vertical_scan_flag = s->alternate_scan,
  83         },
  84         .vop_fcode_forward                = s->f_code,
  85         .vop_fcode_backward               = s->b_code,
  86         .vop_time_increment_resolution    = avctx->framerate.num,
  87         .num_macroblocks_in_gob           = s->mb_width * H263_GOB_HEIGHT(s->height),
  88         .num_gobs_in_vop                  =
  89             (s->mb_width * s->mb_height) / (s->mb_width * H263_GOB_HEIGHT(s->height)),
  90         .TRB                              = s->pb_time,
  91         .TRD                              = s->pp_time,
  92     };
  93
  94     for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
  95         pic_param.sprite_trajectory_du[i]              = ctx->sprite_traj[i][0];
  96         pic_param.sprite_trajectory_dv[i]              = ctx->sprite_traj[i][1];
  97     }
  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     err = ff_vaapi_decode_make_param_buffer(avctx, pic,
 105                                             VAPictureParameterBufferType,
 106                                             &pic_param, sizeof(pic_param));
 107     if (err < 0)
 108         goto fail;
 109
 110     /* Only the first inverse quantisation method uses the weighting matrices */
 111     if (pic_param.vol_fields.bits.quant_type) {
 112         VAIQMatrixBufferMPEG4 iq_matrix;
 113
 114         iq_matrix.load_intra_quant_mat     = 1;
 115         iq_matrix.load_non_intra_quant_mat = 1;
 116
 117         for (i = 0; i < 64; i++) {
 118             int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
 119             iq_matrix.intra_quant_mat[i]     = s->intra_matrix[n];
 120             iq_matrix.non_intra_quant_mat[i] = s->inter_matrix[n];
 121         }
 122
 123         err = ff_vaapi_decode_make_param_buffer(avctx, pic,
 124                                                 VAIQMatrixBufferType,
 125                                                 &iq_matrix, sizeof(iq_matrix));
 126         if (err < 0)
 127             goto fail;
 128     }
 129     return 0;
 130
 131 fail:
 132     ff_vaapi_decode_cancel(avctx, pic);
 133     return err;
 134 }
 135
 136 static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
 137 {
 138     MpegEncContext *s = avctx->priv_data;
 139     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
 140     int ret;
 141
 142     ret = ff_vaapi_decode_issue(avctx, pic);
 143     if (ret < 0)
 144         goto fail;
 145
 146     ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);
 147
 148 fail:
 149     return ret;
 150 }
 151
 152 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
 153 {
 154     MpegEncContext *s = avctx->priv_data;
 155     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
 156     VASliceParameterBufferMPEG4 slice_param;
 157     int err;
 158
 159     slice_param = (VASliceParameterBufferMPEG4) {
 160         .slice_data_size   = size,
 161         .slice_data_offset = 0,
 162         .slice_data_flag   = VA_SLICE_DATA_FLAG_ALL,
 163         .macroblock_offset = get_bits_count(&s->gb) % 8,
 164         .macroblock_number = 0,
 165         .quant_scale       = s->qscale,
 166     };
 167
 168     err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
 169                                             &slice_param, sizeof(slice_param),
 170                                             buffer, size);
 171     if (err < 0) {
 172         ff_vaapi_decode_cancel(avctx, pic);
 173         return err;
 174     }
 175
 176     return 0;
 177 }
 178
 179 #if CONFIG_MPEG4_VAAPI_HWACCEL
 180 AVHWAccel ff_mpeg4_vaapi_hwaccel = {
 181     .name                 = "mpeg4_vaapi",
 182     .type                 = AVMEDIA_TYPE_VIDEO,
 183     .id                   = AV_CODEC_ID_MPEG4,
 184     .pix_fmt              = AV_PIX_FMT_VAAPI,
 185     .start_frame          = &vaapi_mpeg4_start_frame,
 186     .end_frame            = &vaapi_mpeg4_end_frame,
 187     .decode_slice         = &vaapi_mpeg4_decode_slice,
 188     .frame_priv_data_size = sizeof(VAAPIDecodePicture),
 189     .init                 = &ff_vaapi_decode_init,
 190     .uninit               = &ff_vaapi_decode_uninit,
 191     .priv_data_size       = sizeof(VAAPIDecodeContext),
 192 };
 193 #endif
 194
 195 #if CONFIG_H263_VAAPI_HWACCEL
 196 AVHWAccel ff_h263_vaapi_hwaccel = {
 197     .name                 = "h263_vaapi",
 198     .type                 = AVMEDIA_TYPE_VIDEO,
 199     .id                   = AV_CODEC_ID_H263,
 200     .pix_fmt              = AV_PIX_FMT_VAAPI,
 201     .start_frame          = &vaapi_mpeg4_start_frame,
 202     .end_frame            = &vaapi_mpeg4_end_frame,
 203     .decode_slice         = &vaapi_mpeg4_decode_slice,
 204     .frame_priv_data_size = sizeof(VAAPIDecodePicture),
 205     .init                 = &ff_vaapi_decode_init,
 206     .uninit               = &ff_vaapi_decode_uninit,
 207     .priv_data_size       = sizeof(VAAPIDecodeContext),
 208 };
 209 #endif