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  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 "h264.h"
  28. #include "vdpau.h"
  29. #include "vdpau_internal.h"
  30.  
  31. static int32_t h264_foc(int foc)
  32. {
  33.     if (foc == INT_MAX)
  34.         foc = 0;
  35.     return foc;
  36. }
  37.  
  38. static void vdpau_h264_clear_rf(VdpReferenceFrameH264 *rf)
  39. {
  40.     rf->surface             = VDP_INVALID_HANDLE;
  41.     rf->is_long_term        = VDP_FALSE;
  42.     rf->top_is_reference    = VDP_FALSE;
  43.     rf->bottom_is_reference = VDP_FALSE;
  44.     rf->field_order_cnt[0]  = 0;
  45.     rf->field_order_cnt[1]  = 0;
  46.     rf->frame_idx           = 0;
  47. }
  48.  
  49. static void vdpau_h264_set_rf(VdpReferenceFrameH264 *rf, Picture *pic,
  50.                               int pic_structure)
  51. {
  52.     VdpVideoSurface surface = ff_vdpau_get_surface_id(pic);
  53.  
  54.     if (pic_structure == 0)
  55.         pic_structure = pic->reference;
  56.  
  57.     rf->surface             = surface;
  58.     rf->is_long_term        = pic->reference && pic->long_ref;
  59.     rf->top_is_reference    = (pic_structure & PICT_TOP_FIELD)    != 0;
  60.     rf->bottom_is_reference = (pic_structure & PICT_BOTTOM_FIELD) != 0;
  61.     rf->field_order_cnt[0]  = h264_foc(pic->field_poc[0]);
  62.     rf->field_order_cnt[1]  = h264_foc(pic->field_poc[1]);
  63.     rf->frame_idx           = pic->long_ref ? pic->pic_id : pic->frame_num;
  64. }
  65.  
  66. static void vdpau_h264_set_reference_frames(AVCodecContext *avctx)
  67. {
  68.     H264Context * const h = avctx->priv_data;
  69.     struct vdpau_picture_context *pic_ctx = h->cur_pic_ptr->hwaccel_picture_private;
  70.     VdpPictureInfoH264 *info = &pic_ctx->info.h264;
  71.     int list;
  72.  
  73.     VdpReferenceFrameH264 *rf = &info->referenceFrames[0];
  74. #define H264_RF_COUNT FF_ARRAY_ELEMS(info->referenceFrames)
  75.  
  76.     for (list = 0; list < 2; ++list) {
  77.         Picture **lp = list ? h->long_ref : h->short_ref;
  78.         int i, ls    = list ? 16          : h->short_ref_count;
  79.  
  80.         for (i = 0; i < ls; ++i) {
  81.             Picture *pic = lp[i];
  82.             VdpReferenceFrameH264 *rf2;
  83.             VdpVideoSurface surface_ref;
  84.             int pic_frame_idx;
  85.  
  86.             if (!pic || !pic->reference)
  87.                 continue;
  88.             pic_frame_idx = pic->long_ref ? pic->pic_id : pic->frame_num;
  89.             surface_ref = ff_vdpau_get_surface_id(pic);
  90.  
  91.             rf2 = &info->referenceFrames[0];
  92.             while (rf2 != rf) {
  93.                 if ((rf2->surface      == surface_ref)   &&
  94.                     (rf2->is_long_term == pic->long_ref) &&
  95.                     (rf2->frame_idx    == pic_frame_idx))
  96.                     break;
  97.                 ++rf2;
  98.             }
  99.             if (rf2 != rf) {
  100.                 rf2->top_is_reference    |= (pic->reference & PICT_TOP_FIELD)    ? VDP_TRUE : VDP_FALSE;
  101.                 rf2->bottom_is_reference |= (pic->reference & PICT_BOTTOM_FIELD) ? VDP_TRUE : VDP_FALSE;
  102.                 continue;
  103.             }
  104.  
  105.             if (rf >= &info->referenceFrames[H264_RF_COUNT])
  106.                 continue;
  107.  
  108.             vdpau_h264_set_rf(rf, pic, pic->reference);
  109.             ++rf;
  110.         }
  111.     }
  112.  
  113.     for (; rf < &info->referenceFrames[H264_RF_COUNT]; ++rf)
  114.         vdpau_h264_clear_rf(rf);
  115. }
  116.  
  117. static int vdpau_h264_start_frame(AVCodecContext *avctx,
  118.                                   const uint8_t *buffer, uint32_t size)
  119. {
  120.     H264Context * const h = avctx->priv_data;
  121.     Picture *pic = h->cur_pic_ptr;
  122.     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
  123.     VdpPictureInfoH264 *info = &pic_ctx->info.h264;
  124.  
  125.     /* init VdpPictureInfoH264 */
  126.     info->slice_count                            = 0;
  127.     info->field_order_cnt[0]                     = h264_foc(pic->field_poc[0]);
  128.     info->field_order_cnt[1]                     = h264_foc(pic->field_poc[1]);
  129.     info->is_reference                           = h->nal_ref_idc != 0;
  130.     info->frame_num                              = h->frame_num;
  131.     info->field_pic_flag                         = h->picture_structure != PICT_FRAME;
  132.     info->bottom_field_flag                      = h->picture_structure == PICT_BOTTOM_FIELD;
  133.     info->num_ref_frames                         = h->sps.ref_frame_count;
  134.     info->mb_adaptive_frame_field_flag           = h->sps.mb_aff && !info->field_pic_flag;
  135.     info->constrained_intra_pred_flag            = h->pps.constrained_intra_pred;
  136.     info->weighted_pred_flag                     = h->pps.weighted_pred;
  137.     info->weighted_bipred_idc                    = h->pps.weighted_bipred_idc;
  138.     info->frame_mbs_only_flag                    = h->sps.frame_mbs_only_flag;
  139.     info->transform_8x8_mode_flag                = h->pps.transform_8x8_mode;
  140.     info->chroma_qp_index_offset                 = h->pps.chroma_qp_index_offset[0];
  141.     info->second_chroma_qp_index_offset          = h->pps.chroma_qp_index_offset[1];
  142.     info->pic_init_qp_minus26                    = h->pps.init_qp - 26;
  143.     info->num_ref_idx_l0_active_minus1           = h->pps.ref_count[0] - 1;
  144.     info->num_ref_idx_l1_active_minus1           = h->pps.ref_count[1] - 1;
  145.     info->log2_max_frame_num_minus4              = h->sps.log2_max_frame_num - 4;
  146.     info->pic_order_cnt_type                     = h->sps.poc_type;
  147.     info->log2_max_pic_order_cnt_lsb_minus4      = h->sps.poc_type ? 0 : h->sps.log2_max_poc_lsb - 4;
  148.     info->delta_pic_order_always_zero_flag       = h->sps.delta_pic_order_always_zero_flag;
  149.     info->direct_8x8_inference_flag              = h->sps.direct_8x8_inference_flag;
  150.     info->entropy_coding_mode_flag               = h->pps.cabac;
  151.     info->pic_order_present_flag                 = h->pps.pic_order_present;
  152.     info->deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present;
  153.     info->redundant_pic_cnt_present_flag         = h->pps.redundant_pic_cnt_present;
  154.  
  155.     memcpy(info->scaling_lists_4x4, h->pps.scaling_matrix4,
  156.            sizeof(info->scaling_lists_4x4));
  157.     memcpy(info->scaling_lists_8x8[0], h->pps.scaling_matrix8[0],
  158.            sizeof(info->scaling_lists_8x8[0]));
  159.     memcpy(info->scaling_lists_8x8[1], h->pps.scaling_matrix8[3],
  160.            sizeof(info->scaling_lists_8x8[1]));
  161.  
  162.     vdpau_h264_set_reference_frames(avctx);
  163.  
  164.     return ff_vdpau_common_start_frame(pic, buffer, size);
  165. }
  166.  
  167. static const uint8_t start_code_prefix[3] = { 0x00, 0x00, 0x01 };
  168.  
  169. static int vdpau_h264_decode_slice(AVCodecContext *avctx,
  170.                                    const uint8_t *buffer, uint32_t size)
  171. {
  172.     H264Context *h = avctx->priv_data;
  173.     Picture *pic   = h->cur_pic_ptr;
  174.     struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
  175.     int val;
  176.  
  177.     val = ff_vdpau_add_buffer(pic, start_code_prefix, 3);
  178.     if (val)
  179.         return val;
  180.  
  181.     val = ff_vdpau_add_buffer(pic, buffer, size);
  182.     if (val)
  183.         return val;
  184.  
  185.     pic_ctx->info.h264.slice_count++;
  186.     return 0;
  187. }
  188.  
  189. static int vdpau_h264_end_frame(AVCodecContext *avctx)
  190. {
  191.     int res = 0;
  192.     AVVDPAUContext *hwctx = avctx->hwaccel_context;
  193.     H264Context *h = avctx->priv_data;
  194.     Picture *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);
  197.  
  198.     if (!hwctx->render) {
  199.         res = hwctx->render2(avctx, &pic->f, (void *)&pic_ctx->info,
  200.                              pic_ctx->bitstream_buffers_used, pic_ctx->bitstream_buffers);
  201.     } else
  202.     hwctx->render(hwctx->decoder, surf, (void *)&pic_ctx->info,
  203.                   pic_ctx->bitstream_buffers_used, pic_ctx->bitstream_buffers);
  204.  
  205.     ff_h264_draw_horiz_band(h, 0, h->avctx->height);
  206.     av_freep(&pic_ctx->bitstream_buffers);
  207.  
  208.     return res;
  209. }
  210.  
  211. AVHWAccel ff_h264_vdpau_hwaccel = {
  212.     .name           = "h264_vdpau",
  213.     .type           = AVMEDIA_TYPE_VIDEO,
  214.     .id             = AV_CODEC_ID_H264,
  215.     .pix_fmt        = AV_PIX_FMT_VDPAU,
  216.     .start_frame    = vdpau_h264_start_frame,
  217.     .end_frame      = vdpau_h264_end_frame,
  218.     .decode_slice   = vdpau_h264_decode_slice,
  219.     .priv_data_size = sizeof(struct vdpau_picture_context),
  220. };
  221.