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 "hwconfig.h"
  25 #include "internal.h"
  26 #include "mpeg4video.h"
  27 #include "mpegvideo.h"
  28 #include "vaapi_decode.h"
  29
  30 /** Reconstruct bitstream intra_dc_vlc_thr */
  31 static int mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext *s)
  32 {
  33     switch (s->intra_dc_threshold) {
  34     case 99: return 0;
  35     case 13: return 1;
  36     case 15: return 2;
  37     case 17: return 3;
  38     case 19: return 4;
  39     case 21: return 5;
  40     case 23: return 6;
  41     case 0:  return 7;
  42     }
  43     return 0;
  44 }
  45
  46 static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
  47 {
  48     Mpeg4DecContext *ctx = avctx->priv_data;
  49     MpegEncContext *s = &ctx->m;
  50     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
  51     VAPictureParameterBufferMPEG4 pic_param;
  52     int i, err;
  53
  54     pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);
  55
  56     pic_param = (VAPictureParameterBufferMPEG4) {
  57         .vop_width                        = s->width,
  58         .vop_height                       = s->height,
  59         .forward_reference_picture        = VA_INVALID_ID,
  60         .backward_reference_picture       = VA_INVALID_ID,
  61         .vol_fields.bits = {
  62             .short_video_header           = avctx->codec->id == AV_CODEC_ID_H263,
  63             .chroma_format                = CHROMA_420,
  64             .interlaced                   = !s->progressive_sequence,
  65             .obmc_disable                 = 1,
  66             .sprite_enable                = ctx->vol_sprite_usage,
  67             .sprite_warping_accuracy      = s->sprite_warping_accuracy,
  68             .quant_type                   = s->mpeg_quant,
  69             .quarter_sample               = s->quarter_sample,
  70             .data_partitioned             = s->data_partitioning,
  71             .reversible_vlc               = ctx->rvlc,
  72             .resync_marker_disable        = !ctx->resync_marker,
  73         },
  74         .no_of_sprite_warping_points      = ctx->num_sprite_warping_points,
  75         .quant_precision                  = s->quant_precision,
  76         .vop_fields.bits = {
  77             .vop_coding_type              = s->pict_type - AV_PICTURE_TYPE_I,
  78             .backward_reference_vop_coding_type =
  79                 s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f->pict_type - AV_PICTURE_TYPE_I : 0,
  80             .vop_rounding_type            = s->no_rounding,
  81             .intra_dc_vlc_thr             = mpeg4_get_intra_dc_vlc_thr(ctx),
  82             .top_field_first              = s->top_field_first,
  83             .alternate_vertical_scan_flag = s->alternate_scan,
  84         },
  85         .vop_fcode_forward                = s->f_code,
  86         .vop_fcode_backward               = s->b_code,
  87         .vop_time_increment_resolution    = avctx->framerate.num,
  88         .num_macroblocks_in_gob           = s->mb_width * H263_GOB_HEIGHT(s->height),
  89         .num_gobs_in_vop                  =
  90             (s->mb_width * s->mb_height) / (s->mb_width * H263_GOB_HEIGHT(s->height)),
  91         .TRB                              = s->pb_time,
  92         .TRD                              = s->pp_time,
  93     };
  94
  95     for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
  96         pic_param.sprite_trajectory_du[i]              = ctx->sprite_traj[i][0];
  97         pic_param.sprite_trajectory_dv[i]              = ctx->sprite_traj[i][1];
  98     }
  99
 100     if (s->pict_type == AV_PICTURE_TYPE_B)
 101         pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
 102     if (s->pict_type != AV_PICTURE_TYPE_I)
 103         pic_param.forward_reference_picture  = ff_vaapi_get_surface_id(s->last_picture.f);
 104
 105     err = ff_vaapi_decode_make_param_buffer(avctx, pic,
 106                                             VAPictureParameterBufferType,
 107                                             &pic_param, sizeof(pic_param));
 108     if (err < 0)
 109         goto fail;
 110
 111     /* Only the first inverse quantisation method uses the weighting matrices */
 112     if (pic_param.vol_fields.bits.quant_type) {
 113         VAIQMatrixBufferMPEG4 iq_matrix;
 114
 115         iq_matrix.load_intra_quant_mat     = 1;
 116         iq_matrix.load_non_intra_quant_mat = 1;
 117
 118         for (i = 0; i < 64; i++) {
 119             int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
 120             iq_matrix.intra_quant_mat[i]     = s->intra_matrix[n];
 121             iq_matrix.non_intra_quant_mat[i] = s->inter_matrix[n];
 122         }
 123
 124         err = ff_vaapi_decode_make_param_buffer(avctx, pic,
 125                                                 VAIQMatrixBufferType,
 126                                                 &iq_matrix, sizeof(iq_matrix));
 127         if (err < 0)
 128             goto fail;
 129     }
 130     return 0;
 131
 132 fail:
 133     ff_vaapi_decode_cancel(avctx, pic);
 134     return err;
 135 }
 136
 137 static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
 138 {
 139     MpegEncContext *s = avctx->priv_data;
 140     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
 141     int ret;
 142
 143     ret = ff_vaapi_decode_issue(avctx, pic);
 144     if (ret < 0)
 145         goto fail;
 146
 147     ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);
 148
 149 fail:
 150     return ret;
 151 }
 152
 153 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
 154 {
 155     MpegEncContext *s = avctx->priv_data;
 156     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
 157     VASliceParameterBufferMPEG4 slice_param;
 158     int err;
 159
 160     slice_param = (VASliceParameterBufferMPEG4) {
 161         .slice_data_size   = size,
 162         .slice_data_offset = 0,
 163         .slice_data_flag   = VA_SLICE_DATA_FLAG_ALL,
 164         .macroblock_offset = get_bits_count(&s->gb) % 8,
 165         .macroblock_number = 0,
 166         .quant_scale       = s->qscale,
 167     };
 168
 169     err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
 170                                             &slice_param, sizeof(slice_param),
 171                                             buffer, size);
 172     if (err < 0) {
 173         ff_vaapi_decode_cancel(avctx, pic);
 174         return err;
 175     }
 176
 177     return 0;
 178 }
 179
 180 #if CONFIG_MPEG4_VAAPI_HWACCEL
 181 const AVHWAccel ff_mpeg4_vaapi_hwaccel = {
 182     .name                 = "mpeg4_vaapi",
 183     .type                 = AVMEDIA_TYPE_VIDEO,
 184     .id                   = AV_CODEC_ID_MPEG4,
 185     .pix_fmt              = AV_PIX_FMT_VAAPI,
 186     .start_frame          = &vaapi_mpeg4_start_frame,
 187     .end_frame            = &vaapi_mpeg4_end_frame,
 188     .decode_slice         = &vaapi_mpeg4_decode_slice,
 189     .frame_priv_data_size = sizeof(VAAPIDecodePicture),
 190     .init                 = &ff_vaapi_decode_init,
 191     .uninit               = &ff_vaapi_decode_uninit,
 192     .frame_params         = &ff_vaapi_common_frame_params,
 193     .priv_data_size       = sizeof(VAAPIDecodeContext),
 194     .caps_internal        = HWACCEL_CAP_ASYNC_SAFE,
 195 };
 196 #endif
 197
 198 #if CONFIG_H263_VAAPI_HWACCEL
 199 const AVHWAccel ff_h263_vaapi_hwaccel = {
 200     .name                 = "h263_vaapi",
 201     .type                 = AVMEDIA_TYPE_VIDEO,
 202     .id                   = AV_CODEC_ID_H263,
 203     .pix_fmt              = AV_PIX_FMT_VAAPI,
 204     .start_frame          = &vaapi_mpeg4_start_frame,
 205     .end_frame            = &vaapi_mpeg4_end_frame,
 206     .decode_slice         = &vaapi_mpeg4_decode_slice,
 207     .frame_priv_data_size = sizeof(VAAPIDecodePicture),
 208     .init                 = &ff_vaapi_decode_init,
 209     .uninit               = &ff_vaapi_decode_uninit,
 210     .frame_params         = &ff_vaapi_common_frame_params,
 211     .priv_data_size       = sizeof(VAAPIDecodeContext),
 212     .caps_internal        = HWACCEL_CAP_ASYNC_SAFE,
 213 };
 214 #endif