git.sesse.net Git - ffmpeg/blob - libavcodec/vdpau_h264.c

   1 /*
   2  * MPEG-4 Part 10 / AVC / H.264 HW decode acceleration through VDPAU
   3  *
   4  * Copyright (c) 2008 NVIDIA
   5  * Copyright (c) 2013 Rémi Denis-Courmont
   6  *
   7  * This file is part of Libav.
   8  *
   9  * Libav is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * Libav is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with Libav; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #include <vdpau/vdpau.h>
  25
  26 #include "avcodec.h"
  27 #include "internal.h"
  28 #include "h264dec.h"
  29 #include "h264_ps.h"
  30 #include "mpegutils.h"
  31 #include "vdpau.h"
  32 #include "vdpau_internal.h"
  33
  34 static int32_t h264_foc(int foc)
  35 {
  36     if (foc == INT_MAX)
  37         foc = 0;
  38     return foc;
  39 }
  40
  41 static void vdpau_h264_clear_rf(VdpReferenceFrameH264 *rf)
  42 {
  43     rf->surface             = VDP_INVALID_HANDLE;
  44     rf->is_long_term        = VDP_FALSE;
  45     rf->top_is_reference    = VDP_FALSE;
  46     rf->bottom_is_reference = VDP_FALSE;
  47     rf->field_order_cnt[0]  = 0;
  48     rf->field_order_cnt[1]  = 0;
  49     rf->frame_idx           = 0;
  50 }
  51
  52 static void vdpau_h264_set_rf(VdpReferenceFrameH264 *rf, H264Picture *pic,
  53                               int pic_structure)
  54 {
  55     VdpVideoSurface surface = ff_vdpau_get_surface_id(pic->f);
  56
  57     if (pic_structure == 0)
  58         pic_structure = pic->reference;
  59
  60     rf->surface             = surface;
  61     rf->is_long_term        = pic->reference && pic->long_ref;
  62     rf->top_is_reference    = (pic_structure & PICT_TOP_FIELD)    != 0;
  63     rf->bottom_is_reference = (pic_structure & PICT_BOTTOM_FIELD) != 0;
  64     rf->field_order_cnt[0]  = h264_foc(pic->field_poc[0]);
  65     rf->field_order_cnt[1]  = h264_foc(pic->field_poc[1]);
  66     rf->frame_idx           = pic->long_ref ? pic->pic_id : pic->frame_num;
  67 }
  68
  69 static void vdpau_h264_set_reference_frames(AVCodecContext *avctx)
  70 {
  71     H264Context * const h = avctx->priv_data;
  72     struct vdpau_picture_context *pic_ctx = h->cur_pic_ptr->hwaccel_picture_private;
  73     VdpPictureInfoH264 *info = &pic_ctx->info.h264;
  74     int list;
  75
  76     VdpReferenceFrameH264 *rf = &info->referenceFrames[0];
  77 #define H264_RF_COUNT FF_ARRAY_ELEMS(info->referenceFrames)
  78
  79     for (list = 0; list < 2; ++list) {
  80         H264Picture **lp = list ? h->long_ref : h->short_ref;
  81         int i, ls    = list ? 16          : h->short_ref_count;
  82
  83         for (i = 0; i < ls; ++i) {
  84             H264Picture *pic = lp[i];
  85             VdpReferenceFrameH264 *rf2;
  86             VdpVideoSurface surface_ref;
  87             int pic_frame_idx;
  88
  89             if (!pic || !pic->reference)
  90                 continue;
  91             pic_frame_idx = pic->long_ref ? pic->pic_id : pic->frame_num;
  92             surface_ref = ff_vdpau_get_surface_id(pic->f);
  93
  94             rf2 = &info->referenceFrames[0];
  95             while (rf2 != rf) {
  96                 if ((rf2->surface      == surface_ref)   &&
  97                     (rf2->is_long_term == pic->long_ref) &&
  98                     (rf2->frame_idx    == pic_frame_idx))
  99                     break;
 100                 ++rf2;
 101             }
 102             if (rf2 != rf) {
 103                 rf2->top_is_reference    |= (pic->reference & PICT_TOP_FIELD)    ? VDP_TRUE : VDP_FALSE;
 104                 rf2->bottom_is_reference |= (pic->reference & PICT_BOTTOM_FIELD) ? VDP_TRUE : VDP_FALSE;
 105                 continue;
 106             }
 107
 108             if (rf >= &info->referenceFrames[H264_RF_COUNT])
 109                 continue;
 110
 111             vdpau_h264_set_rf(rf, pic, pic->reference);
 112             ++rf;
 113         }
 114     }
 115
 116     for (; rf < &info->referenceFrames[H264_RF_COUNT]; ++rf)
 117         vdpau_h264_clear_rf(rf);
 118 }
 119
 120 static int vdpau_h264_start_frame(AVCodecContext *avctx,
 121                                   const uint8_t *buffer, uint32_t size)
 122 {
 123     H264Context * const h = avctx->priv_data;
 124     const PPS *pps = h->ps.pps;
 125     const SPS *sps = h->ps.sps;
 126     H264Picture *pic = h->cur_pic_ptr;
 127     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
 128     VdpPictureInfoH264 *info = &pic_ctx->info.h264;
 129 #ifdef VDP_DECODER_PROFILE_H264_HIGH_444_PREDICTIVE
 130     VdpPictureInfoH264Predictive *info2 = &pic_ctx->info.h264_predictive;
 131 #endif
 132
 133     /* init VdpPictureInfoH264 */
 134     info->slice_count                            = 0;
 135     info->field_order_cnt[0]                     = h264_foc(pic->field_poc[0]);
 136     info->field_order_cnt[1]                     = h264_foc(pic->field_poc[1]);
 137     info->is_reference                           = h->nal_ref_idc != 0;
 138     info->frame_num                              = h->poc.frame_num;
 139     info->field_pic_flag                         = h->picture_structure != PICT_FRAME;
 140     info->bottom_field_flag                      = h->picture_structure == PICT_BOTTOM_FIELD;
 141     info->num_ref_frames                         = sps->ref_frame_count;
 142     info->mb_adaptive_frame_field_flag           = sps->mb_aff && !info->field_pic_flag;
 143     info->constrained_intra_pred_flag            = pps->constrained_intra_pred;
 144     info->weighted_pred_flag                     = pps->weighted_pred;
 145     info->weighted_bipred_idc                    = pps->weighted_bipred_idc;
 146     info->frame_mbs_only_flag                    = sps->frame_mbs_only_flag;
 147     info->transform_8x8_mode_flag                = pps->transform_8x8_mode;
 148     info->chroma_qp_index_offset                 = pps->chroma_qp_index_offset[0];
 149     info->second_chroma_qp_index_offset          = pps->chroma_qp_index_offset[1];
 150     info->pic_init_qp_minus26                    = pps->init_qp - 26;
 151     info->num_ref_idx_l0_active_minus1           = pps->ref_count[0] - 1;
 152     info->num_ref_idx_l1_active_minus1           = pps->ref_count[1] - 1;
 153     info->log2_max_frame_num_minus4              = sps->log2_max_frame_num - 4;
 154     info->pic_order_cnt_type                     = sps->poc_type;
 155     info->log2_max_pic_order_cnt_lsb_minus4      = sps->poc_type ? 0 : sps->log2_max_poc_lsb - 4;
 156     info->delta_pic_order_always_zero_flag       = sps->delta_pic_order_always_zero_flag;
 157     info->direct_8x8_inference_flag              = sps->direct_8x8_inference_flag;
 158 #ifdef VDP_DECODER_PROFILE_H264_HIGH_444_PREDICTIVE
 159     info2->qpprime_y_zero_transform_bypass_flag  = sps->transform_bypass;
 160     info2->separate_colour_plane_flag            = sps->residual_color_transform_flag;
 161 #endif
 162     info->entropy_coding_mode_flag               = pps->cabac;
 163     info->pic_order_present_flag                 = pps->pic_order_present;
 164     info->deblocking_filter_control_present_flag = pps->deblocking_filter_parameters_present;
 165     info->redundant_pic_cnt_present_flag         = pps->redundant_pic_cnt_present;
 166
 167     memcpy(info->scaling_lists_4x4, pps->scaling_matrix4,
 168            sizeof(info->scaling_lists_4x4));
 169     memcpy(info->scaling_lists_8x8[0], pps->scaling_matrix8[0],
 170            sizeof(info->scaling_lists_8x8[0]));
 171     memcpy(info->scaling_lists_8x8[1], pps->scaling_matrix8[3],
 172            sizeof(info->scaling_lists_8x8[1]));
 173
 174     vdpau_h264_set_reference_frames(avctx);
 175
 176     return ff_vdpau_common_start_frame(pic_ctx, buffer, size);
 177 }
 178
 179 static const uint8_t start_code_prefix[3] = { 0x00, 0x00, 0x01 };
 180
 181 static int vdpau_h264_decode_slice(AVCodecContext *avctx,
 182                                    const uint8_t *buffer, uint32_t size)
 183 {
 184     H264Context *h = avctx->priv_data;
 185     H264Picture *pic = h->cur_pic_ptr;
 186     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
 187     int val;
 188
 189     val = ff_vdpau_add_buffer(pic_ctx, start_code_prefix, 3);
 190     if (val)
 191         return val;
 192
 193     val = ff_vdpau_add_buffer(pic_ctx, buffer, size);
 194     if (val)
 195         return val;
 196
 197     pic_ctx->info.h264.slice_count++;
 198     return 0;
 199 }
 200
 201 static int vdpau_h264_end_frame(AVCodecContext *avctx)
 202 {
 203     H264Context *h = avctx->priv_data;
 204     H264SliceContext *sl = &h->slice_ctx[0];
 205     H264Picture *pic = h->cur_pic_ptr;
 206     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
 207     int val;
 208
 209     val = ff_vdpau_common_end_frame(avctx, pic->f, pic_ctx);
 210     if (val < 0)
 211         return val;
 212
 213     ff_h264_draw_horiz_band(h, sl, 0, h->avctx->height);
 214     return 0;
 215 }
 216
 217 static int vdpau_h264_init(AVCodecContext *avctx)
 218 {
 219     VdpDecoderProfile profile;
 220     uint32_t level = avctx->level;
 221
 222     switch (avctx->profile & ~FF_PROFILE_H264_INTRA) {
 223     case FF_PROFILE_H264_BASELINE:
 224         profile = VDP_DECODER_PROFILE_H264_BASELINE;
 225         break;
 226     case FF_PROFILE_H264_CONSTRAINED_BASELINE:
 227 #ifdef VDP_DECODER_PROFILE_H264_CONSTRAINED_BASELINE
 228         profile = VDP_DECODER_PROFILE_H264_CONSTRAINED_BASELINE;
 229         break;
 230 #endif
 231     case FF_PROFILE_H264_MAIN:
 232         profile = VDP_DECODER_PROFILE_H264_MAIN;
 233         break;
 234     case FF_PROFILE_H264_HIGH:
 235         profile = VDP_DECODER_PROFILE_H264_HIGH;
 236         break;
 237 #ifdef VDP_DECODER_PROFILE_H264_EXTENDED
 238     case FF_PROFILE_H264_EXTENDED:
 239         profile = VDP_DECODER_PROFILE_H264_EXTENDED;
 240         break;
 241 #endif
 242     case FF_PROFILE_H264_HIGH_10:
 243         /* XXX: High 10 can be treated as High so long as only 8 bits per
 244          * format are supported. */
 245         profile = VDP_DECODER_PROFILE_H264_HIGH;
 246         break;
 247 #ifdef VDP_DECODER_PROFILE_H264_HIGH_444_PREDICTIVE
 248     case FF_PROFILE_H264_HIGH_422:
 249     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
 250     case FF_PROFILE_H264_CAVLC_444:
 251         profile = VDP_DECODER_PROFILE_H264_HIGH_444_PREDICTIVE;
 252         break;
 253 #endif
 254     default:
 255         return AVERROR(ENOTSUP);
 256     }
 257
 258     if ((avctx->profile & FF_PROFILE_H264_INTRA) && avctx->level == 11)
 259         level = VDP_DECODER_LEVEL_H264_1b;
 260
 261     return ff_vdpau_common_init(avctx, profile, level);
 262 }
 263
 264 AVHWAccel ff_h264_vdpau_hwaccel = {
 265     .name           = "h264_vdpau",
 266     .type           = AVMEDIA_TYPE_VIDEO,
 267     .id             = AV_CODEC_ID_H264,
 268     .pix_fmt        = AV_PIX_FMT_VDPAU,
 269     .start_frame    = vdpau_h264_start_frame,
 270     .end_frame      = vdpau_h264_end_frame,
 271     .decode_slice   = vdpau_h264_decode_slice,
 272     .frame_priv_data_size = sizeof(struct vdpau_picture_context),
 273     .init           = vdpau_h264_init,
 274     .uninit         = ff_vdpau_common_uninit,
 275     .priv_data_size = sizeof(VDPAUContext),
 276 };