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 "h263.h"
  25 #include "mpeg4video.h"
  26
  27 /** Reconstruct bitstream intra_dc_vlc_thr */
  28 static int mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext *s)
  29 {
  30     switch (s->intra_dc_threshold) {
  31     case 99: return 0;
  32     case 13: return 1;
  33     case 15: return 2;
  34     case 17: return 3;
  35     case 19: return 4;
  36     case 21: return 5;
  37     case 23: return 6;
  38     case 0:  return 7;
  39     }
  40     return 0;
  41 }
  42
  43 static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
  44 {
  45     Mpeg4DecContext *ctx = avctx->priv_data;
  46     MpegEncContext * const s = &ctx->m;
  47     struct vaapi_context * const vactx = avctx->hwaccel_context;
  48     VAPictureParameterBufferMPEG4 *pic_param;
  49     VAIQMatrixBufferMPEG4 *iq_matrix;
  50     int i;
  51
  52     av_dlog(avctx, "vaapi_mpeg4_start_frame()\n");
  53
  54     vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4);
  55
  56     /* Fill in VAPictureParameterBufferMPEG4 */
  57     pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG4));
  58     if (!pic_param)
  59         return -1;
  60     pic_param->vop_width                                = s->width;
  61     pic_param->vop_height                               = s->height;
  62     pic_param->forward_reference_picture                = VA_INVALID_ID;
  63     pic_param->backward_reference_picture               = VA_INVALID_ID;
  64     pic_param->vol_fields.value                         = 0; /* reset all bits */
  65     pic_param->vol_fields.bits.short_video_header       = avctx->codec->id == AV_CODEC_ID_H263;
  66     pic_param->vol_fields.bits.chroma_format            = CHROMA_420;
  67     pic_param->vol_fields.bits.interlaced               = !s->progressive_sequence;
  68     pic_param->vol_fields.bits.obmc_disable             = 1;
  69     pic_param->vol_fields.bits.sprite_enable            = ctx->vol_sprite_usage;
  70     pic_param->vol_fields.bits.sprite_warping_accuracy  = s->sprite_warping_accuracy;
  71     pic_param->vol_fields.bits.quant_type               = s->mpeg_quant;
  72     pic_param->vol_fields.bits.quarter_sample           = s->quarter_sample;
  73     pic_param->vol_fields.bits.data_partitioned         = s->data_partitioning;
  74     pic_param->vol_fields.bits.reversible_vlc           = ctx->rvlc;
  75     pic_param->vol_fields.bits.resync_marker_disable    = !ctx->resync_marker;
  76     pic_param->no_of_sprite_warping_points              = ctx->num_sprite_warping_points;
  77     for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
  78         pic_param->sprite_trajectory_du[i]              = ctx->sprite_traj[i][0];
  79         pic_param->sprite_trajectory_dv[i]              = ctx->sprite_traj[i][1];
  80     }
  81     pic_param->quant_precision                          = s->quant_precision;
  82     pic_param->vop_fields.value                         = 0; /* reset all bits */
  83     pic_param->vop_fields.bits.vop_coding_type          = s->pict_type - AV_PICTURE_TYPE_I;
  84     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;
  85     pic_param->vop_fields.bits.vop_rounding_type        = s->no_rounding;
  86     pic_param->vop_fields.bits.intra_dc_vlc_thr         = mpeg4_get_intra_dc_vlc_thr(ctx);
  87     pic_param->vop_fields.bits.top_field_first          = s->top_field_first;
  88     pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan;
  89     pic_param->vop_fcode_forward                        = s->f_code;
  90     pic_param->vop_fcode_backward                       = s->b_code;
  91     pic_param->vop_time_increment_resolution            = avctx->framerate.num;
  92     pic_param->num_macroblocks_in_gob                   = s->mb_width * ff_h263_get_gob_height(s);
  93     pic_param->num_gobs_in_vop                          = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob;
  94     pic_param->TRB                                      = s->pb_time;
  95     pic_param->TRD                                      = s->pp_time;
  96
  97     if (s->pict_type == AV_PICTURE_TYPE_B)
  98         pic_param->backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
  99     if (s->pict_type != AV_PICTURE_TYPE_I)
 100         pic_param->forward_reference_picture  = ff_vaapi_get_surface_id(s->last_picture.f);
 101
 102     /* Fill in VAIQMatrixBufferMPEG4 */
 103     /* Only the first inverse quantisation method uses the weighting matrices */
 104     if (pic_param->vol_fields.bits.quant_type) {
 105         iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4));
 106         if (!iq_matrix)
 107             return -1;
 108         iq_matrix->load_intra_quant_mat         = 1;
 109         iq_matrix->load_non_intra_quant_mat     = 1;
 110
 111         for (i = 0; i < 64; i++) {
 112             int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
 113             iq_matrix->intra_quant_mat[i]       = s->intra_matrix[n];
 114             iq_matrix->non_intra_quant_mat[i]   = s->inter_matrix[n];
 115         }
 116     }
 117     return 0;
 118 }
 119
 120 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
 121 {
 122     MpegEncContext * const s = avctx->priv_data;
 123     VASliceParameterBufferMPEG4 *slice_param;
 124
 125     av_dlog(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size);
 126
 127     /* Fill in VASliceParameterBufferMPEG4 */
 128     slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
 129     if (!slice_param)
 130         return -1;
 131     slice_param->macroblock_offset      = get_bits_count(&s->gb) % 8;
 132     slice_param->macroblock_number      = 0;
 133     slice_param->quant_scale            = s->qscale;
 134
 135     return 0;
 136 }
 137
 138 #if CONFIG_MPEG4_VAAPI_HWACCEL
 139 AVHWAccel ff_mpeg4_vaapi_hwaccel = {
 140     .name           = "mpeg4_vaapi",
 141     .type           = AVMEDIA_TYPE_VIDEO,
 142     .id             = AV_CODEC_ID_MPEG4,
 143     .pix_fmt        = AV_PIX_FMT_VAAPI_VLD,
 144     .start_frame    = vaapi_mpeg4_start_frame,
 145     .end_frame      = ff_vaapi_mpeg_end_frame,
 146     .decode_slice   = vaapi_mpeg4_decode_slice,
 147 };
 148 #endif
 149
 150 #if CONFIG_H263_VAAPI_HWACCEL
 151 AVHWAccel ff_h263_vaapi_hwaccel = {
 152     .name           = "h263_vaapi",
 153     .type           = AVMEDIA_TYPE_VIDEO,
 154     .id             = AV_CODEC_ID_H263,
 155     .pix_fmt        = AV_PIX_FMT_VAAPI_VLD,
 156     .start_frame    = vaapi_mpeg4_start_frame,
 157     .end_frame      = ff_vaapi_mpeg_end_frame,
 158     .decode_slice   = vaapi_mpeg4_decode_slice,
 159 };
 160 #endif