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ffmpeg/libavcodec/vdpau_h264.c

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