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 FFmpeg.
   8  *
   9  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 "h264.h"
  29 #include "mpegutils.h"
  30 #include "vdpau.h"
  31 #include "vdpau_internal.h"
  32
  33 static int32_t h264_foc(int foc)
  34 {
  35     if (foc == INT_MAX)
  36         foc = 0;
  37     return foc;
  38 }
  39
  40 static void vdpau_h264_clear_rf(VdpReferenceFrameH264 *rf)
  41 {
  42     rf->surface             = VDP_INVALID_HANDLE;
  43     rf->is_long_term        = VDP_FALSE;
  44     rf->top_is_reference    = VDP_FALSE;
  45     rf->bottom_is_reference = VDP_FALSE;
  46     rf->field_order_cnt[0]  = 0;
  47     rf->field_order_cnt[1]  = 0;
  48     rf->frame_idx           = 0;
  49 }
  50
  51 static void vdpau_h264_set_rf(VdpReferenceFrameH264 *rf, H264Picture *pic,
  52                               int pic_structure)
  53 {
  54     VdpVideoSurface surface = ff_vdpau_get_surface_id(&pic->f);
  55
  56     if (pic_structure == 0)
  57         pic_structure = pic->reference;
  58
  59     rf->surface             = surface;
  60     rf->is_long_term        = pic->reference && pic->long_ref;
  61     rf->top_is_reference    = (pic_structure & PICT_TOP_FIELD)    != 0;
  62     rf->bottom_is_reference = (pic_structure & PICT_BOTTOM_FIELD) != 0;
  63     rf->field_order_cnt[0]  = h264_foc(pic->field_poc[0]);
  64     rf->field_order_cnt[1]  = h264_foc(pic->field_poc[1]);
  65     rf->frame_idx           = pic->long_ref ? pic->pic_id : pic->frame_num;
  66 }
  67
  68 static void vdpau_h264_set_reference_frames(AVCodecContext *avctx)
  69 {
  70     H264Context * const h = avctx->priv_data;
  71     struct vdpau_picture_context *pic_ctx = h->cur_pic_ptr->hwaccel_picture_private;
  72     VdpPictureInfoH264 *info = &pic_ctx->info.h264;
  73     int list;
  74
  75     VdpReferenceFrameH264 *rf = &info->referenceFrames[0];
  76 #define H264_RF_COUNT FF_ARRAY_ELEMS(info->referenceFrames)
  77
  78     for (list = 0; list < 2; ++list) {
  79         H264Picture **lp = list ? h->long_ref : h->short_ref;
  80         int i, ls    = list ? 16          : h->short_ref_count;
  81
  82         for (i = 0; i < ls; ++i) {
  83             H264Picture *pic = lp[i];
  84             VdpReferenceFrameH264 *rf2;
  85             VdpVideoSurface surface_ref;
  86             int pic_frame_idx;
  87
  88             if (!pic || !pic->reference)
  89                 continue;
  90             pic_frame_idx = pic->long_ref ? pic->pic_id : pic->frame_num;
  91             surface_ref = ff_vdpau_get_surface_id(&pic->f);
  92
  93             rf2 = &info->referenceFrames[0];
  94             while (rf2 != rf) {
  95                 if ((rf2->surface      == surface_ref)   &&
  96                     (rf2->is_long_term == pic->long_ref) &&
  97                     (rf2->frame_idx    == pic_frame_idx))
  98                     break;
  99                 ++rf2;
 100             }
 101             if (rf2 != rf) {
 102                 rf2->top_is_reference    |= (pic->reference & PICT_TOP_FIELD)    ? VDP_TRUE : VDP_FALSE;
 103                 rf2->bottom_is_reference |= (pic->reference & PICT_BOTTOM_FIELD) ? VDP_TRUE : VDP_FALSE;
 104                 continue;
 105             }
 106
 107             if (rf >= &info->referenceFrames[H264_RF_COUNT])
 108                 continue;
 109
 110             vdpau_h264_set_rf(rf, pic, pic->reference);
 111             ++rf;
 112         }
 113     }
 114
 115     for (; rf < &info->referenceFrames[H264_RF_COUNT]; ++rf)
 116         vdpau_h264_clear_rf(rf);
 117 }
 118
 119 static int vdpau_h264_start_frame(AVCodecContext *avctx,
 120                                   const uint8_t *buffer, uint32_t size)
 121 {
 122     H264Context * const h = avctx->priv_data;
 123     H264Picture *pic = h->cur_pic_ptr;
 124     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
 125     VdpPictureInfoH264 *info = &pic_ctx->info.h264;
 126 #ifdef VDP_DECODER_PROFILE_H264_HIGH_444_PREDICTIVE
 127     VdpPictureInfoH264Predictive *info2 = &pic_ctx->info.h264_predictive;
 128 #endif
 129
 130     /* init VdpPictureInfoH264 */
 131     info->slice_count                            = 0;
 132     info->field_order_cnt[0]                     = h264_foc(pic->field_poc[0]);
 133     info->field_order_cnt[1]                     = h264_foc(pic->field_poc[1]);
 134     info->is_reference                           = h->nal_ref_idc != 0;
 135     info->frame_num                              = h->frame_num;
 136     info->field_pic_flag                         = h->picture_structure != PICT_FRAME;
 137     info->bottom_field_flag                      = h->picture_structure == PICT_BOTTOM_FIELD;
 138     info->num_ref_frames                         = h->sps.ref_frame_count;
 139     info->mb_adaptive_frame_field_flag           = h->sps.mb_aff && !info->field_pic_flag;
 140     info->constrained_intra_pred_flag            = h->pps.constrained_intra_pred;
 141     info->weighted_pred_flag                     = h->pps.weighted_pred;
 142     info->weighted_bipred_idc                    = h->pps.weighted_bipred_idc;
 143     info->frame_mbs_only_flag                    = h->sps.frame_mbs_only_flag;
 144     info->transform_8x8_mode_flag                = h->pps.transform_8x8_mode;
 145     info->chroma_qp_index_offset                 = h->pps.chroma_qp_index_offset[0];
 146     info->second_chroma_qp_index_offset          = h->pps.chroma_qp_index_offset[1];
 147     info->pic_init_qp_minus26                    = h->pps.init_qp - 26;
 148     info->num_ref_idx_l0_active_minus1           = h->pps.ref_count[0] - 1;
 149     info->num_ref_idx_l1_active_minus1           = h->pps.ref_count[1] - 1;
 150     info->log2_max_frame_num_minus4              = h->sps.log2_max_frame_num - 4;
 151     info->pic_order_cnt_type                     = h->sps.poc_type;
 152     info->log2_max_pic_order_cnt_lsb_minus4      = h->sps.poc_type ? 0 : h->sps.log2_max_poc_lsb - 4;
 153     info->delta_pic_order_always_zero_flag       = h->sps.delta_pic_order_always_zero_flag;
 154     info->direct_8x8_inference_flag              = h->sps.direct_8x8_inference_flag;
 155 #ifdef VDP_DECODER_PROFILE_H264_HIGH_444_PREDICTIVE
 156     info2->qpprime_y_zero_transform_bypass_flag  = h->sps.transform_bypass;
 157     info2->separate_colour_plane_flag            = h->sps.residual_color_transform_flag;
 158 #endif
 159     info->entropy_coding_mode_flag               = h->pps.cabac;
 160     info->pic_order_present_flag                 = h->pps.pic_order_present;
 161     info->deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present;
 162     info->redundant_pic_cnt_present_flag         = h->pps.redundant_pic_cnt_present;
 163
 164     memcpy(info->scaling_lists_4x4, h->pps.scaling_matrix4,
 165            sizeof(info->scaling_lists_4x4));
 166     memcpy(info->scaling_lists_8x8[0], h->pps.scaling_matrix8[0],
 167            sizeof(info->scaling_lists_8x8[0]));
 168     memcpy(info->scaling_lists_8x8[1], h->pps.scaling_matrix8[3],
 169            sizeof(info->scaling_lists_8x8[1]));
 170
 171     vdpau_h264_set_reference_frames(avctx);
 172
 173     return ff_vdpau_common_start_frame(pic_ctx, buffer, size);
 174 }
 175
 176 static const uint8_t start_code_prefix[3] = { 0x00, 0x00, 0x01 };
 177
 178 static int vdpau_h264_decode_slice(AVCodecContext *avctx,
 179                                    const uint8_t *buffer, uint32_t size)
 180 {
 181     H264Context *h = avctx->priv_data;
 182     H264Picture *pic = h->cur_pic_ptr;
 183     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
 184     int val;
 185
 186     val = ff_vdpau_add_buffer(pic_ctx, start_code_prefix, 3);
 187     if (val)
 188         return val;
 189
 190     val = ff_vdpau_add_buffer(pic_ctx, buffer, size);
 191     if (val)
 192         return val;
 193
 194     pic_ctx->info.h264.slice_count++;
 195     return 0;
 196 }
 197
 198 static int vdpau_h264_end_frame(AVCodecContext *avctx)
 199 {
 200     H264Context *h = avctx->priv_data;
 201     H264Picture *pic = h->cur_pic_ptr;
 202     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
 203     int val;
 204
 205     val = ff_vdpau_common_end_frame(avctx, &pic->f, pic_ctx);
 206     if (val < 0)
 207         return val;
 208
 209     ff_h264_draw_horiz_band(h, 0, h->avctx->height);
 210     return 0;
 211 }
 212
 213 static int vdpau_h264_init(AVCodecContext *avctx)
 214 {
 215     VdpDecoderProfile profile;
 216     uint32_t level = avctx->level;
 217
 218     switch (avctx->profile & ~FF_PROFILE_H264_INTRA) {
 219     case FF_PROFILE_H264_BASELINE:
 220         profile = VDP_DECODER_PROFILE_H264_BASELINE;
 221         break;
 222     case FF_PROFILE_H264_CONSTRAINED_BASELINE:
 223 #ifdef VDP_DECODER_PROFILE_H264_CONSTRAINED_BASELINE
 224         profile = VDP_DECODER_PROFILE_H264_CONSTRAINED_BASELINE;
 225         break;
 226 #endif
 227     case FF_PROFILE_H264_MAIN:
 228         profile = VDP_DECODER_PROFILE_H264_MAIN;
 229         break;
 230     case FF_PROFILE_H264_HIGH:
 231         profile = VDP_DECODER_PROFILE_H264_HIGH;
 232         break;
 233 #ifdef VDP_DECODER_PROFILE_H264_EXTENDED
 234     case FF_PROFILE_H264_EXTENDED:
 235         profile = VDP_DECODER_PROFILE_H264_EXTENDED;
 236         break;
 237 #endif
 238     case FF_PROFILE_H264_HIGH_10:
 239         /* XXX: High 10 can be treated as High so long as only 8-bits per
 240          * formats are supported. */
 241         profile = VDP_DECODER_PROFILE_H264_HIGH;
 242         break;
 243 #ifdef VDP_DECODER_PROFILE_H264_HIGH_444_PREDICTIVE
 244     case FF_PROFILE_H264_HIGH_422:
 245     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
 246     case FF_PROFILE_H264_CAVLC_444:
 247         profile = VDP_DECODER_PROFILE_H264_HIGH_444_PREDICTIVE;
 248         break;
 249 #endif
 250     default:
 251         return AVERROR(ENOTSUP);
 252     }
 253
 254     if ((avctx->profile & FF_PROFILE_H264_INTRA) && avctx->level == 11)
 255         level = VDP_DECODER_LEVEL_H264_1b;
 256
 257     return ff_vdpau_common_init(avctx, profile, level);
 258 }
 259
 260 AVHWAccel ff_h264_vdpau_hwaccel = {
 261     .name           = "h264_vdpau",
 262     .type           = AVMEDIA_TYPE_VIDEO,
 263     .id             = AV_CODEC_ID_H264,
 264     .pix_fmt        = AV_PIX_FMT_VDPAU,
 265     .start_frame    = vdpau_h264_start_frame,
 266     .end_frame      = vdpau_h264_end_frame,
 267     .decode_slice   = vdpau_h264_decode_slice,
 268     .frame_priv_data_size = sizeof(struct vdpau_picture_context),
 269     .init           = vdpau_h264_init,
 270     .uninit         = ff_vdpau_common_uninit,
 271     .priv_data_size = sizeof(VDPAUContext),
 272 };