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 "h264.h"
  28 #include "mpegutils.h"
  29 #include "vdpau.h"
  30 #include "vdpau_internal.h"
  31
  32 static int32_t h264_foc(int foc)
  33 {
  34     if (foc == INT_MAX)
  35         foc = 0;
  36     return foc;
  37 }
  38
  39 static void vdpau_h264_clear_rf(VdpReferenceFrameH264 *rf)
  40 {
  41     rf->surface             = VDP_INVALID_HANDLE;
  42     rf->is_long_term        = VDP_FALSE;
  43     rf->top_is_reference    = VDP_FALSE;
  44     rf->bottom_is_reference = VDP_FALSE;
  45     rf->field_order_cnt[0]  = 0;
  46     rf->field_order_cnt[1]  = 0;
  47     rf->frame_idx           = 0;
  48 }
  49
  50 static void vdpau_h264_set_rf(VdpReferenceFrameH264 *rf, H264Picture *pic,
  51                               int pic_structure)
  52 {
  53     VdpVideoSurface surface = ff_vdpau_get_surface_id(&pic->f);
  54
  55     if (pic_structure == 0)
  56         pic_structure = pic->reference;
  57
  58     rf->surface             = surface;
  59     rf->is_long_term        = pic->reference && pic->long_ref;
  60     rf->top_is_reference    = (pic_structure & PICT_TOP_FIELD)    != 0;
  61     rf->bottom_is_reference = (pic_structure & PICT_BOTTOM_FIELD) != 0;
  62     rf->field_order_cnt[0]  = h264_foc(pic->field_poc[0]);
  63     rf->field_order_cnt[1]  = h264_foc(pic->field_poc[1]);
  64     rf->frame_idx           = pic->long_ref ? pic->pic_id : pic->frame_num;
  65 }
  66
  67 static void vdpau_h264_set_reference_frames(AVCodecContext *avctx)
  68 {
  69     H264Context * const h = avctx->priv_data;
  70     struct vdpau_picture_context *pic_ctx = h->cur_pic_ptr->hwaccel_picture_private;
  71     VdpPictureInfoH264 *info = &pic_ctx->info.h264;
  72     int list;
  73
  74     VdpReferenceFrameH264 *rf = &info->referenceFrames[0];
  75 #define H264_RF_COUNT FF_ARRAY_ELEMS(info->referenceFrames)
  76
  77     for (list = 0; list < 2; ++list) {
  78         H264Picture **lp = list ? h->long_ref : h->short_ref;
  79         int i, ls    = list ? 16          : h->short_ref_count;
  80
  81         for (i = 0; i < ls; ++i) {
  82             H264Picture *pic = lp[i];
  83             VdpReferenceFrameH264 *rf2;
  84             VdpVideoSurface surface_ref;
  85             int pic_frame_idx;
  86
  87             if (!pic || !pic->reference)
  88                 continue;
  89             pic_frame_idx = pic->long_ref ? pic->pic_id : pic->frame_num;
  90             surface_ref = ff_vdpau_get_surface_id(&pic->f);
  91
  92             rf2 = &info->referenceFrames[0];
  93             while (rf2 != rf) {
  94                 if ((rf2->surface      == surface_ref)   &&
  95                     (rf2->is_long_term == pic->long_ref) &&
  96                     (rf2->frame_idx    == pic_frame_idx))
  97                     break;
  98                 ++rf2;
  99             }
 100             if (rf2 != rf) {
 101                 rf2->top_is_reference    |= (pic->reference & PICT_TOP_FIELD)    ? VDP_TRUE : VDP_FALSE;
 102                 rf2->bottom_is_reference |= (pic->reference & PICT_BOTTOM_FIELD) ? VDP_TRUE : VDP_FALSE;
 103                 continue;
 104             }
 105
 106             if (rf >= &info->referenceFrames[H264_RF_COUNT])
 107                 continue;
 108
 109             vdpau_h264_set_rf(rf, pic, pic->reference);
 110             ++rf;
 111         }
 112     }
 113
 114     for (; rf < &info->referenceFrames[H264_RF_COUNT]; ++rf)
 115         vdpau_h264_clear_rf(rf);
 116 }
 117
 118 static int vdpau_h264_start_frame(AVCodecContext *avctx,
 119                                   const uint8_t *buffer, uint32_t size)
 120 {
 121     H264Context * const h = avctx->priv_data;
 122     H264Picture *pic = h->cur_pic_ptr;
 123     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
 124     VdpPictureInfoH264 *info = &pic_ctx->info.h264;
 125
 126     /* init VdpPictureInfoH264 */
 127     info->slice_count                            = 0;
 128     info->field_order_cnt[0]                     = h264_foc(pic->field_poc[0]);
 129     info->field_order_cnt[1]                     = h264_foc(pic->field_poc[1]);
 130     info->is_reference                           = h->nal_ref_idc != 0;
 131     info->frame_num                              = h->frame_num;
 132     info->field_pic_flag                         = h->picture_structure != PICT_FRAME;
 133     info->bottom_field_flag                      = h->picture_structure == PICT_BOTTOM_FIELD;
 134     info->num_ref_frames                         = h->sps.ref_frame_count;
 135     info->mb_adaptive_frame_field_flag           = h->sps.mb_aff && !info->field_pic_flag;
 136     info->constrained_intra_pred_flag            = h->pps.constrained_intra_pred;
 137     info->weighted_pred_flag                     = h->pps.weighted_pred;
 138     info->weighted_bipred_idc                    = h->pps.weighted_bipred_idc;
 139     info->frame_mbs_only_flag                    = h->sps.frame_mbs_only_flag;
 140     info->transform_8x8_mode_flag                = h->pps.transform_8x8_mode;
 141     info->chroma_qp_index_offset                 = h->pps.chroma_qp_index_offset[0];
 142     info->second_chroma_qp_index_offset          = h->pps.chroma_qp_index_offset[1];
 143     info->pic_init_qp_minus26                    = h->pps.init_qp - 26;
 144     info->num_ref_idx_l0_active_minus1           = h->pps.ref_count[0] - 1;
 145     info->num_ref_idx_l1_active_minus1           = h->pps.ref_count[1] - 1;
 146     info->log2_max_frame_num_minus4              = h->sps.log2_max_frame_num - 4;
 147     info->pic_order_cnt_type                     = h->sps.poc_type;
 148     info->log2_max_pic_order_cnt_lsb_minus4      = h->sps.poc_type ? 0 : h->sps.log2_max_poc_lsb - 4;
 149     info->delta_pic_order_always_zero_flag       = h->sps.delta_pic_order_always_zero_flag;
 150     info->direct_8x8_inference_flag              = h->sps.direct_8x8_inference_flag;
 151     info->entropy_coding_mode_flag               = h->pps.cabac;
 152     info->pic_order_present_flag                 = h->pps.pic_order_present;
 153     info->deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present;
 154     info->redundant_pic_cnt_present_flag         = h->pps.redundant_pic_cnt_present;
 155
 156     memcpy(info->scaling_lists_4x4, h->pps.scaling_matrix4,
 157            sizeof(info->scaling_lists_4x4));
 158     memcpy(info->scaling_lists_8x8[0], h->pps.scaling_matrix8[0],
 159            sizeof(info->scaling_lists_8x8[0]));
 160     memcpy(info->scaling_lists_8x8[1], h->pps.scaling_matrix8[3],
 161            sizeof(info->scaling_lists_8x8[1]));
 162
 163     vdpau_h264_set_reference_frames(avctx);
 164
 165     return ff_vdpau_common_start_frame(pic_ctx, buffer, size);
 166 }
 167
 168 static const uint8_t start_code_prefix[3] = { 0x00, 0x00, 0x01 };
 169
 170 static int vdpau_h264_decode_slice(AVCodecContext *avctx,
 171                                    const uint8_t *buffer, uint32_t size)
 172 {
 173     H264Context *h = avctx->priv_data;
 174     H264Picture *pic = h->cur_pic_ptr;
 175     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
 176     int val;
 177
 178     val = ff_vdpau_add_buffer(pic_ctx, start_code_prefix, 3);
 179     if (val)
 180         return val;
 181
 182     val = ff_vdpau_add_buffer(pic_ctx, buffer, size);
 183     if (val)
 184         return val;
 185
 186     pic_ctx->info.h264.slice_count++;
 187     return 0;
 188 }
 189
 190 static int vdpau_h264_end_frame(AVCodecContext *avctx)
 191 {
 192     AVVDPAUContext *hwctx = avctx->hwaccel_context;
 193     H264Context *h = avctx->priv_data;
 194     H264Picture *pic = h->cur_pic_ptr;
 195     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
 196     VdpVideoSurface surf = ff_vdpau_get_surface_id(&pic->f);
 197
 198     hwctx->render(hwctx->decoder, surf, (void *)&pic_ctx->info,
 199                   pic_ctx->bitstream_buffers_used, pic_ctx->bitstream_buffers);
 200
 201     ff_h264_draw_horiz_band(h, 0, h->avctx->height);
 202     av_freep(&pic_ctx->bitstream_buffers);
 203
 204     return 0;
 205 }
 206
 207 AVHWAccel ff_h264_vdpau_hwaccel = {
 208     .name           = "h264_vdpau",
 209     .type           = AVMEDIA_TYPE_VIDEO,
 210     .id             = AV_CODEC_ID_H264,
 211     .pix_fmt        = AV_PIX_FMT_VDPAU,
 212     .start_frame    = vdpau_h264_start_frame,
 213     .end_frame      = vdpau_h264_end_frame,
 214     .decode_slice   = vdpau_h264_decode_slice,
 215     .frame_priv_data_size = sizeof(struct vdpau_picture_context),
 216 };