yading@10: /*
yading@10:  * MPEG-4 Part 10 / AVC / H.264 HW decode acceleration through VDPAU
yading@10:  *
yading@10:  * Copyright (c) 2008 NVIDIA
yading@10:  * Copyright (c) 2013 Rémi Denis-Courmont
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software Foundation,
yading@10:  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include <vdpau/vdpau.h>
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "h264.h"
yading@10: #include "vdpau.h"
yading@10: #include "vdpau_internal.h"
yading@10: 
yading@10: static int32_t h264_foc(int foc)
yading@10: {
yading@10:     if (foc == INT_MAX)
yading@10:         foc = 0;
yading@10:     return foc;
yading@10: }
yading@10: 
yading@10: static void vdpau_h264_clear_rf(VdpReferenceFrameH264 *rf)
yading@10: {
yading@10:     rf->surface             = VDP_INVALID_HANDLE;
yading@10:     rf->is_long_term        = VDP_FALSE;
yading@10:     rf->top_is_reference    = VDP_FALSE;
yading@10:     rf->bottom_is_reference = VDP_FALSE;
yading@10:     rf->field_order_cnt[0]  = 0;
yading@10:     rf->field_order_cnt[1]  = 0;
yading@10:     rf->frame_idx           = 0;
yading@10: }
yading@10: 
yading@10: static void vdpau_h264_set_rf(VdpReferenceFrameH264 *rf, Picture *pic,
yading@10:                               int pic_structure)
yading@10: {
yading@10:     VdpVideoSurface surface = ff_vdpau_get_surface_id(pic);
yading@10: 
yading@10:     if (pic_structure == 0)
yading@10:         pic_structure = pic->reference;
yading@10: 
yading@10:     rf->surface             = surface;
yading@10:     rf->is_long_term        = pic->reference && pic->long_ref;
yading@10:     rf->top_is_reference    = (pic_structure & PICT_TOP_FIELD)    != 0;
yading@10:     rf->bottom_is_reference = (pic_structure & PICT_BOTTOM_FIELD) != 0;
yading@10:     rf->field_order_cnt[0]  = h264_foc(pic->field_poc[0]);
yading@10:     rf->field_order_cnt[1]  = h264_foc(pic->field_poc[1]);
yading@10:     rf->frame_idx           = pic->long_ref ? pic->pic_id : pic->frame_num;
yading@10: }
yading@10: 
yading@10: static void vdpau_h264_set_reference_frames(AVCodecContext *avctx)
yading@10: {
yading@10:     H264Context * const h = avctx->priv_data;
yading@10:     AVVDPAUContext *hwctx = avctx->hwaccel_context;
yading@10:     VdpPictureInfoH264 *info = &hwctx->info.h264;
yading@10:     int list;
yading@10: 
yading@10:     VdpReferenceFrameH264 *rf = &info->referenceFrames[0];
yading@10: #define H264_RF_COUNT FF_ARRAY_ELEMS(info->referenceFrames)
yading@10: 
yading@10:     for (list = 0; list < 2; ++list) {
yading@10:         Picture **lp = list ? h->long_ref : h->short_ref;
yading@10:         int i, ls    = list ? 16          : h->short_ref_count;
yading@10: 
yading@10:         for (i = 0; i < ls; ++i) {
yading@10:             Picture *pic = lp[i];
yading@10:             VdpReferenceFrameH264 *rf2;
yading@10:             VdpVideoSurface surface_ref;
yading@10:             int pic_frame_idx;
yading@10: 
yading@10:             if (!pic || !pic->reference)
yading@10:                 continue;
yading@10:             pic_frame_idx = pic->long_ref ? pic->pic_id : pic->frame_num;
yading@10:             surface_ref = ff_vdpau_get_surface_id(pic);
yading@10: 
yading@10:             rf2 = &info->referenceFrames[0];
yading@10:             while (rf2 != rf) {
yading@10:                 if ((rf2->surface      == surface_ref)   &&
yading@10:                     (rf2->is_long_term == pic->long_ref) &&
yading@10:                     (rf2->frame_idx    == pic_frame_idx))
yading@10:                     break;
yading@10:                 ++rf2;
yading@10:             }
yading@10:             if (rf2 != rf) {
yading@10:                 rf2->top_is_reference    |= (pic->reference & PICT_TOP_FIELD)    ? VDP_TRUE : VDP_FALSE;
yading@10:                 rf2->bottom_is_reference |= (pic->reference & PICT_BOTTOM_FIELD) ? VDP_TRUE : VDP_FALSE;
yading@10:                 continue;
yading@10:             }
yading@10: 
yading@10:             if (rf >= &info->referenceFrames[H264_RF_COUNT])
yading@10:                 continue;
yading@10: 
yading@10:             vdpau_h264_set_rf(rf, pic, pic->reference);
yading@10:             ++rf;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     for (; rf < &info->referenceFrames[H264_RF_COUNT]; ++rf)
yading@10:         vdpau_h264_clear_rf(rf);
yading@10: }
yading@10: 
yading@10: static int vdpau_h264_start_frame(AVCodecContext *avctx,
yading@10:                                   const uint8_t *buffer, uint32_t size)
yading@10: {
yading@10:     H264Context * const h = avctx->priv_data;
yading@10:     AVVDPAUContext *hwctx = avctx->hwaccel_context;
yading@10:     VdpPictureInfoH264 *info = &hwctx->info.h264;
yading@10:     Picture *pic = h->cur_pic_ptr;
yading@10: 
yading@10:     /* init VdpPictureInfoH264 */
yading@10:     info->slice_count                            = 0;
yading@10:     info->field_order_cnt[0]                     = h264_foc(pic->field_poc[0]);
yading@10:     info->field_order_cnt[1]                     = h264_foc(pic->field_poc[1]);
yading@10:     info->is_reference                           = h->nal_ref_idc != 0;
yading@10:     info->frame_num                              = h->frame_num;
yading@10:     info->field_pic_flag                         = h->picture_structure != PICT_FRAME;
yading@10:     info->bottom_field_flag                      = h->picture_structure == PICT_BOTTOM_FIELD;
yading@10:     info->num_ref_frames                         = h->sps.ref_frame_count;
yading@10:     info->mb_adaptive_frame_field_flag           = h->sps.mb_aff && !info->field_pic_flag;
yading@10:     info->constrained_intra_pred_flag            = h->pps.constrained_intra_pred;
yading@10:     info->weighted_pred_flag                     = h->pps.weighted_pred;
yading@10:     info->weighted_bipred_idc                    = h->pps.weighted_bipred_idc;
yading@10:     info->frame_mbs_only_flag                    = h->sps.frame_mbs_only_flag;
yading@10:     info->transform_8x8_mode_flag                = h->pps.transform_8x8_mode;
yading@10:     info->chroma_qp_index_offset                 = h->pps.chroma_qp_index_offset[0];
yading@10:     info->second_chroma_qp_index_offset          = h->pps.chroma_qp_index_offset[1];
yading@10:     info->pic_init_qp_minus26                    = h->pps.init_qp - 26;
yading@10:     info->num_ref_idx_l0_active_minus1           = h->pps.ref_count[0] - 1;
yading@10:     info->num_ref_idx_l1_active_minus1           = h->pps.ref_count[1] - 1;
yading@10:     info->log2_max_frame_num_minus4              = h->sps.log2_max_frame_num - 4;
yading@10:     info->pic_order_cnt_type                     = h->sps.poc_type;
yading@10:     info->log2_max_pic_order_cnt_lsb_minus4      = h->sps.poc_type ? 0 : h->sps.log2_max_poc_lsb - 4;
yading@10:     info->delta_pic_order_always_zero_flag       = h->sps.delta_pic_order_always_zero_flag;
yading@10:     info->direct_8x8_inference_flag              = h->sps.direct_8x8_inference_flag;
yading@10:     info->entropy_coding_mode_flag               = h->pps.cabac;
yading@10:     info->pic_order_present_flag                 = h->pps.pic_order_present;
yading@10:     info->deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present;
yading@10:     info->redundant_pic_cnt_present_flag         = h->pps.redundant_pic_cnt_present;
yading@10: 
yading@10:     memcpy(info->scaling_lists_4x4, h->pps.scaling_matrix4,
yading@10:            sizeof(info->scaling_lists_4x4));
yading@10:     memcpy(info->scaling_lists_8x8[0], h->pps.scaling_matrix8[0],
yading@10:            sizeof(info->scaling_lists_8x8[0]));
yading@10:     memcpy(info->scaling_lists_8x8[1], h->pps.scaling_matrix8[3],
yading@10:            sizeof(info->scaling_lists_8x8[1]));
yading@10: 
yading@10:     vdpau_h264_set_reference_frames(avctx);
yading@10: 
yading@10:     return ff_vdpau_common_start_frame(avctx, buffer, size);
yading@10: }
yading@10: 
yading@10: static const uint8_t start_code_prefix[3] = { 0x00, 0x00, 0x01 };
yading@10: 
yading@10: static int vdpau_h264_decode_slice(AVCodecContext *avctx,
yading@10:                                    const uint8_t *buffer, uint32_t size)
yading@10: {
yading@10:     AVVDPAUContext *hwctx = avctx->hwaccel_context;
yading@10:     int val;
yading@10: 
yading@10:     val = ff_vdpau_add_buffer(avctx, start_code_prefix, 3);
yading@10:     if (val)
yading@10:         return val;
yading@10: 
yading@10:     val = ff_vdpau_add_buffer(avctx, buffer, size);
yading@10:     if (val)
yading@10:         return val;
yading@10: 
yading@10:     hwctx->info.h264.slice_count++;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int vdpau_h264_end_frame(AVCodecContext *avctx)
yading@10: {
yading@10:     AVVDPAUContext *hwctx = avctx->hwaccel_context;
yading@10:     H264Context *h = avctx->priv_data;
yading@10:     VdpVideoSurface surf = ff_vdpau_get_surface_id(h->cur_pic_ptr);
yading@10: 
yading@10:     hwctx->render(hwctx->decoder, surf, (void *)&hwctx->info,
yading@10:                   hwctx->bitstream_buffers_used, hwctx->bitstream_buffers);
yading@10: 
yading@10:     ff_h264_draw_horiz_band(h, 0, h->avctx->height);
yading@10:     hwctx->bitstream_buffers_used = 0;
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: AVHWAccel ff_h264_vdpau_hwaccel = {
yading@10:     .name           = "h264_vdpau",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_H264,
yading@10:     .pix_fmt        = AV_PIX_FMT_VDPAU,
yading@10:     .start_frame    = vdpau_h264_start_frame,
yading@10:     .end_frame      = vdpau_h264_end_frame,
yading@10:     .decode_slice   = vdpau_h264_decode_slice,
yading@10: };