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
  26 /** Reconstruct bitstream intra_dc_vlc_thr */
  27 static int mpeg4_get_intra_dc_vlc_thr(MpegEncContext *s)
  28 {
  29     switch (s->intra_dc_threshold) {
  30     case 99: return 0;
  31     case 13: return 1;
  32     case 15: return 2;
  33     case 17: return 3;
  34     case 19: return 4;
  35     case 21: return 5;
  36     case 23: return 6;
  37     case 0:  return 7;
  38     }
  39     return 0;
  40 }
  41
  42 static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
  43 {
  44     MpegEncContext * const s = avctx->priv_data;
  45     struct vaapi_context * const vactx = avctx->hwaccel_context;
  46     VAPictureParameterBufferMPEG4 *pic_param;
  47     VAIQMatrixBufferMPEG4 *iq_matrix;
  48     int i;
  49
  50     av_dlog(avctx, "vaapi_mpeg4_start_frame()\n");
  51
  52     vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4);
  53
  54     /* Fill in VAPictureParameterBufferMPEG4 */
  55     pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG4));
  56     if (!pic_param)
  57         return -1;
  58     pic_param->vop_width                                = s->width;
  59     pic_param->vop_height                               = s->height;
  60     pic_param->forward_reference_picture                = VA_INVALID_ID;
  61     pic_param->backward_reference_picture               = VA_INVALID_ID;
  62     pic_param->vol_fields.value                         = 0; /* reset all bits */
  63     pic_param->vol_fields.bits.short_video_header       = avctx->codec->id == CODEC_ID_H263;
  64     pic_param->vol_fields.bits.chroma_format            = CHROMA_420;
  65     pic_param->vol_fields.bits.interlaced               = !s->progressive_sequence;
  66     pic_param->vol_fields.bits.obmc_disable             = 1;
  67     pic_param->vol_fields.bits.sprite_enable            = s->vol_sprite_usage;
  68     pic_param->vol_fields.bits.sprite_warping_accuracy  = s->sprite_warping_accuracy;
  69     pic_param->vol_fields.bits.quant_type               = s->mpeg_quant;
  70     pic_param->vol_fields.bits.quarter_sample           = s->quarter_sample;
  71     pic_param->vol_fields.bits.data_partitioned         = s->data_partitioning;
  72     pic_param->vol_fields.bits.reversible_vlc           = s->rvlc;
  73     pic_param->vol_fields.bits.resync_marker_disable    = !s->resync_marker;
  74     pic_param->no_of_sprite_warping_points              = s->num_sprite_warping_points;
  75     for (i = 0; i < s->num_sprite_warping_points && i < 3; i++) {
  76         pic_param->sprite_trajectory_du[i]              = s->sprite_traj[i][0];
  77         pic_param->sprite_trajectory_dv[i]              = s->sprite_traj[i][1];
  78     }
  79     pic_param->quant_precision                          = s->quant_precision;
  80     pic_param->vop_fields.value                         = 0; /* reset all bits */
  81     pic_param->vop_fields.bits.vop_coding_type          = s->pict_type - FF_I_TYPE;
  82     pic_param->vop_fields.bits.backward_reference_vop_coding_type = s->pict_type == FF_B_TYPE ? s->next_picture.pict_type - FF_I_TYPE : 0;
  83     pic_param->vop_fields.bits.vop_rounding_type        = s->no_rounding;
  84     pic_param->vop_fields.bits.intra_dc_vlc_thr         = mpeg4_get_intra_dc_vlc_thr(s);
  85     pic_param->vop_fields.bits.top_field_first          = s->top_field_first;
  86     pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan;
  87     pic_param->vop_fcode_forward                        = s->f_code;
  88     pic_param->vop_fcode_backward                       = s->b_code;
  89     pic_param->vop_time_increment_resolution            = avctx->time_base.den;
  90     pic_param->num_macroblocks_in_gob                   = s->mb_width * ff_h263_get_gob_height(s);
  91     pic_param->num_gobs_in_vop                          = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob;
  92     pic_param->TRB                                      = s->pb_time;
  93     pic_param->TRD                                      = s->pp_time;
  94
  95     if (s->pict_type == FF_B_TYPE)
  96         pic_param->backward_reference_picture = ff_vaapi_get_surface_id(&s->next_picture);
  97     if (s->pict_type != FF_I_TYPE)
  98         pic_param->forward_reference_picture  = ff_vaapi_get_surface_id(&s->last_picture);
  99
 100     /* Fill in VAIQMatrixBufferMPEG4 */
 101     /* Only the first inverse quantisation method uses the weighthing matrices */
 102     if (pic_param->vol_fields.bits.quant_type) {
 103         iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4));
 104         if (!iq_matrix)
 105             return -1;
 106         iq_matrix->load_intra_quant_mat         = 1;
 107         iq_matrix->load_non_intra_quant_mat     = 1;
 108
 109         for (i = 0; i < 64; i++) {
 110             int n = s->dsp.idct_permutation[ff_zigzag_direct[i]];
 111             iq_matrix->intra_quant_mat[i]       = s->intra_matrix[n];
 112             iq_matrix->non_intra_quant_mat[i]   = s->inter_matrix[n];
 113         }
 114     }
 115     return 0;
 116 }
 117
 118 static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
 119 {
 120     return ff_vaapi_common_end_frame(avctx->priv_data);
 121 }
 122
 123 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
 124 {
 125     MpegEncContext * const s = avctx->priv_data;
 126     VASliceParameterBufferMPEG4 *slice_param;
 127
 128     av_dlog(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size);
 129
 130     /* video_plane_with_short_video_header() contains all GOBs
 131      * in-order, and this is what VA API (Intel backend) expects: only
 132      * a single slice param. So fake macroblock_number for FFmpeg so
 133      * that we don't call vaapi_mpeg4_decode_slice() again
 134      */
 135     if (avctx->codec->id == CODEC_ID_H263)
 136         size = s->gb.buffer_end - buffer;
 137
 138     /* Fill in VASliceParameterBufferMPEG4 */
 139     slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
 140     if (!slice_param)
 141         return -1;
 142     slice_param->macroblock_offset      = get_bits_count(&s->gb) % 8;
 143     slice_param->macroblock_number      = s->mb_y * s->mb_width + s->mb_x;
 144     slice_param->quant_scale            = s->qscale;
 145
 146     if (avctx->codec->id == CODEC_ID_H263)
 147         s->mb_y = s->mb_height;
 148
 149     return 0;
 150 }
 151
 152 #if CONFIG_MPEG4_VAAPI_HWACCEL
 153 AVHWAccel ff_mpeg4_vaapi_hwaccel = {
 154     .name           = "mpeg4_vaapi",
 155     .type           = AVMEDIA_TYPE_VIDEO,
 156     .id             = CODEC_ID_MPEG4,
 157     .pix_fmt        = PIX_FMT_VAAPI_VLD,
 158     .capabilities   = 0,
 159     .start_frame    = vaapi_mpeg4_start_frame,
 160     .end_frame      = vaapi_mpeg4_end_frame,
 161     .decode_slice   = vaapi_mpeg4_decode_slice,
 162     .priv_data_size = 0,
 163 };
 164 #endif
 165
 166 #if CONFIG_H263_VAAPI_HWACCEL
 167 AVHWAccel ff_h263_vaapi_hwaccel = {
 168     .name           = "h263_vaapi",
 169     .type           = AVMEDIA_TYPE_VIDEO,
 170     .id             = CODEC_ID_H263,
 171     .pix_fmt        = PIX_FMT_VAAPI_VLD,
 172     .capabilities   = 0,
 173     .start_frame    = vaapi_mpeg4_start_frame,
 174     .end_frame      = vaapi_mpeg4_end_frame,
 175     .decode_slice   = vaapi_mpeg4_decode_slice,
 176     .priv_data_size = 0,
 177 };
 178 #endif