Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / 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 RĂ©mi 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
127 /* init VdpPictureInfoH264 */
128 info->slice_count = 0;
129 info->field_order_cnt[0] = h264_foc(pic->field_poc[0]);
130 info->field_order_cnt[1] = h264_foc(pic->field_poc[1]);
131 info->is_reference = h->nal_ref_idc != 0;
132 info->frame_num = h->frame_num;
133 info->field_pic_flag = h->picture_structure != PICT_FRAME;
134 info->bottom_field_flag = h->picture_structure == PICT_BOTTOM_FIELD;
135 info->num_ref_frames = h->sps.ref_frame_count;
136 info->mb_adaptive_frame_field_flag = h->sps.mb_aff && !info->field_pic_flag;
137 info->constrained_intra_pred_flag = h->pps.constrained_intra_pred;
138 info->weighted_pred_flag = h->pps.weighted_pred;
139 info->weighted_bipred_idc = h->pps.weighted_bipred_idc;
140 info->frame_mbs_only_flag = h->sps.frame_mbs_only_flag;
141 info->transform_8x8_mode_flag = h->pps.transform_8x8_mode;
142 info->chroma_qp_index_offset = h->pps.chroma_qp_index_offset[0];
143 info->second_chroma_qp_index_offset = h->pps.chroma_qp_index_offset[1];
144 info->pic_init_qp_minus26 = h->pps.init_qp - 26;
145 info->num_ref_idx_l0_active_minus1 = h->pps.ref_count[0] - 1;
146 info->num_ref_idx_l1_active_minus1 = h->pps.ref_count[1] - 1;
147 info->log2_max_frame_num_minus4 = h->sps.log2_max_frame_num - 4;
148 info->pic_order_cnt_type = h->sps.poc_type;
149 info->log2_max_pic_order_cnt_lsb_minus4 = h->sps.poc_type ? 0 : h->sps.log2_max_poc_lsb - 4;
150 info->delta_pic_order_always_zero_flag = h->sps.delta_pic_order_always_zero_flag;
151 info->direct_8x8_inference_flag = h->sps.direct_8x8_inference_flag;
152 info->entropy_coding_mode_flag = h->pps.cabac;
153 info->pic_order_present_flag = h->pps.pic_order_present;
154 info->deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present;
155 info->redundant_pic_cnt_present_flag = h->pps.redundant_pic_cnt_present;
156
157 memcpy(info->scaling_lists_4x4, h->pps.scaling_matrix4,
158 sizeof(info->scaling_lists_4x4));
159 memcpy(info->scaling_lists_8x8[0], h->pps.scaling_matrix8[0],
160 sizeof(info->scaling_lists_8x8[0]));
161 memcpy(info->scaling_lists_8x8[1], h->pps.scaling_matrix8[3],
162 sizeof(info->scaling_lists_8x8[1]));
163
164 vdpau_h264_set_reference_frames(avctx);
165
166 return ff_vdpau_common_start_frame(pic_ctx, buffer, size);
167 }
168
169 static const uint8_t start_code_prefix[3] = { 0x00, 0x00, 0x01 };
170
171 static int vdpau_h264_decode_slice(AVCodecContext *avctx,
172 const uint8_t *buffer, uint32_t size)
173 {
174 H264Context *h = avctx->priv_data;
175 H264Picture *pic = h->cur_pic_ptr;
176 struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
177 int val;
178
179 val = ff_vdpau_add_buffer(pic_ctx, start_code_prefix, 3);
180 if (val)
181 return val;
182
183 val = ff_vdpau_add_buffer(pic_ctx, buffer, size);
184 if (val)
185 return val;
186
187 pic_ctx->info.h264.slice_count++;
188 return 0;
189 }
190
191 static int vdpau_h264_end_frame(AVCodecContext *avctx)
192 {
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 int val;
197
198 val = ff_vdpau_common_end_frame(avctx, &pic->f, pic_ctx);
199 if (val < 0)
200 return val;
201
202 ff_h264_draw_horiz_band(h, 0, h->avctx->height);
203 return 0;
204 }
205
206 static int vdpau_h264_init(AVCodecContext *avctx)
207 {
208 VdpDecoderProfile profile;
209 uint32_t level = avctx->level;
210
211 switch (avctx->profile & ~FF_PROFILE_H264_INTRA) {
212 case FF_PROFILE_H264_BASELINE:
213 profile = VDP_DECODER_PROFILE_H264_BASELINE;
214 break;
215 case FF_PROFILE_H264_CONSTRAINED_BASELINE:
216 case FF_PROFILE_H264_MAIN:
217 profile = VDP_DECODER_PROFILE_H264_MAIN;
218 break;
219 case FF_PROFILE_H264_HIGH:
220 profile = VDP_DECODER_PROFILE_H264_HIGH;
221 break;
222 default:
223 return AVERROR(ENOTSUP);
224 }
225
226 if ((avctx->profile & FF_PROFILE_H264_INTRA) && avctx->level == 11)
227 level = VDP_DECODER_LEVEL_H264_1b;
228
229 return ff_vdpau_common_init(avctx, profile, level);
230 }
231
232 AVHWAccel ff_h264_vdpau_hwaccel = {
233 .name = "h264_vdpau",
234 .type = AVMEDIA_TYPE_VIDEO,
235 .id = AV_CODEC_ID_H264,
236 .pix_fmt = AV_PIX_FMT_VDPAU,
237 .start_frame = vdpau_h264_start_frame,
238 .end_frame = vdpau_h264_end_frame,
239 .decode_slice = vdpau_h264_decode_slice,
240 .frame_priv_data_size = sizeof(struct vdpau_picture_context),
241 .init = vdpau_h264_init,
242 .uninit = ff_vdpau_common_uninit,
243 .priv_data_size = sizeof(VDPAUContext),
244 };