vaapi_vc1: Constify pointers
[ffmpeg.git] / libavcodec / vaapi_vc1.c
1 /*
2  * VC-1 HW decode acceleration through VA API
3  *
4  * Copyright (C) 2008-2009 Splitted-Desktop Systems
5  *
6  * This file is part of Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22
23 #include "vaapi_internal.h"
24 #include "internal.h"
25 #include "vc1.h"
26 #include "vc1data.h"
27
28 /** Translate Libav MV modes to VA API */
29 static int get_VAMvModeVC1(enum MVModes mv_mode)
30 {
31     switch (mv_mode) {
32     case MV_PMODE_1MV_HPEL_BILIN: return VAMvMode1MvHalfPelBilinear;
33     case MV_PMODE_1MV:            return VAMvMode1Mv;
34     case MV_PMODE_1MV_HPEL:       return VAMvMode1MvHalfPel;
35     case MV_PMODE_MIXED_MV:       return VAMvModeMixedMv;
36     case MV_PMODE_INTENSITY_COMP: return VAMvModeIntensityCompensation;
37     }
38     return 0;
39 }
40
41 /** Check whether the MVTYPEMB bitplane is present */
42 static inline int vc1_has_MVTYPEMB_bitplane(const VC1Context *v)
43 {
44     if (v->mv_type_is_raw)
45         return 0;
46     return v->s.pict_type == AV_PICTURE_TYPE_P &&
47            (v->mv_mode == MV_PMODE_MIXED_MV ||
48             (v->mv_mode == MV_PMODE_INTENSITY_COMP &&
49              v->mv_mode2 == MV_PMODE_MIXED_MV));
50 }
51
52 /** Check whether the SKIPMB bitplane is present */
53 static inline int vc1_has_SKIPMB_bitplane(const VC1Context *v)
54 {
55     if (v->skip_is_raw)
56         return 0;
57     return v->s.pict_type == AV_PICTURE_TYPE_P ||
58            (v->s.pict_type == AV_PICTURE_TYPE_B && !v->bi_type);
59 }
60
61 /** Check whether the DIRECTMB bitplane is present */
62 static inline int vc1_has_DIRECTMB_bitplane(const VC1Context *v)
63 {
64     if (v->dmb_is_raw)
65         return 0;
66     return v->s.pict_type == AV_PICTURE_TYPE_B && !v->bi_type;
67 }
68
69 /** Check whether the ACPRED bitplane is present */
70 static inline int vc1_has_ACPRED_bitplane(const VC1Context *v)
71 {
72     if (v->acpred_is_raw)
73         return 0;
74     return v->profile == PROFILE_ADVANCED &&
75            (v->s.pict_type == AV_PICTURE_TYPE_I ||
76             (v->s.pict_type == AV_PICTURE_TYPE_B && v->bi_type));
77 }
78
79 /** Check whether the OVERFLAGS bitplane is present */
80 static inline int vc1_has_OVERFLAGS_bitplane(const VC1Context *v)
81 {
82     if (v->overflg_is_raw)
83         return 0;
84     return v->profile == PROFILE_ADVANCED &&
85            (v->s.pict_type == AV_PICTURE_TYPE_I ||
86             (v->s.pict_type == AV_PICTURE_TYPE_B && v->bi_type)) &&
87            (v->overlap && v->pq <= 8) &&
88            v->condover == CONDOVER_SELECT;
89 }
90
91 /** Reconstruct bitstream PTYPE (7.1.1.4, index into Table-35) */
92 static int vc1_get_PTYPE(const VC1Context *v)
93 {
94     const MpegEncContext *s = &v->s;
95     switch (s->pict_type) {
96     case AV_PICTURE_TYPE_I: return 0;
97     case AV_PICTURE_TYPE_P: return v->p_frame_skipped ? 4 : 1;
98     case AV_PICTURE_TYPE_B: return v->bi_type         ? 3 : 2;
99     }
100     return 0;
101 }
102
103 /** Reconstruct bitstream MVMODE (7.1.1.32) */
104 static inline VAMvModeVC1 vc1_get_MVMODE(const VC1Context *v)
105 {
106     if (v->s.pict_type == AV_PICTURE_TYPE_P ||
107         (v->s.pict_type == AV_PICTURE_TYPE_B && !v->bi_type))
108         return get_VAMvModeVC1(v->mv_mode);
109     return 0;
110 }
111
112 /** Reconstruct bitstream MVMODE2 (7.1.1.33) */
113 static inline VAMvModeVC1 vc1_get_MVMODE2(const VC1Context *v)
114 {
115     if (v->s.pict_type == AV_PICTURE_TYPE_P && v->mv_mode == MV_PMODE_INTENSITY_COMP)
116         return get_VAMvModeVC1(v->mv_mode2);
117     return 0;
118 }
119
120 /** Reconstruct bitstream TTFRM (7.1.1.41, Table-53) */
121 static inline int vc1_get_TTFRM(const VC1Context *v)
122 {
123     switch (v->ttfrm) {
124     case TT_8X8: return 0;
125     case TT_8X4: return 1;
126     case TT_4X8: return 2;
127     case TT_4X4: return 3;
128     }
129     return 0;
130 }
131
132 /** Pack Libav bitplanes into a VABitPlaneBuffer element */
133 static inline void vc1_pack_bitplanes(uint8_t *bitplane, int n, const uint8_t *ff_bp[3], int x, int y, int stride)
134 {
135     const int bitplane_index = n / 2;
136     const int ff_bp_index = y * stride + x;
137     uint8_t v = 0;
138     if (ff_bp[0])
139         v = ff_bp[0][ff_bp_index];
140     if (ff_bp[1])
141         v |= ff_bp[1][ff_bp_index] << 1;
142     if (ff_bp[2])
143         v |= ff_bp[2][ff_bp_index] << 2;
144     bitplane[bitplane_index] = (bitplane[bitplane_index] << 4) | v;
145 }
146
147 static int vaapi_vc1_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
148 {
149     const VC1Context *v = avctx->priv_data;
150     const MpegEncContext *s = &v->s;
151     struct vaapi_context * const vactx = avctx->hwaccel_context;
152     VAPictureParameterBufferVC1 *pic_param;
153
154     vactx->slice_param_size = sizeof(VASliceParameterBufferVC1);
155
156     /* Fill in VAPictureParameterBufferVC1 */
157     pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferVC1));
158     if (!pic_param)
159         return -1;
160     pic_param->forward_reference_picture                            = VA_INVALID_ID;
161     pic_param->backward_reference_picture                           = VA_INVALID_ID;
162     pic_param->inloop_decoded_picture                               = VA_INVALID_ID;
163     pic_param->sequence_fields.value                                = 0; /* reset all bits */
164     pic_param->sequence_fields.bits.pulldown                        = v->broadcast;
165     pic_param->sequence_fields.bits.interlace                       = v->interlace;
166     pic_param->sequence_fields.bits.tfcntrflag                      = v->tfcntrflag;
167     pic_param->sequence_fields.bits.finterpflag                     = v->finterpflag;
168     pic_param->sequence_fields.bits.psf                             = v->psf;
169     pic_param->sequence_fields.bits.multires                        = v->multires;
170     pic_param->sequence_fields.bits.overlap                         = v->overlap;
171     pic_param->sequence_fields.bits.syncmarker                      = v->resync_marker;
172     pic_param->sequence_fields.bits.rangered                        = v->rangered;
173     pic_param->sequence_fields.bits.max_b_frames                    = s->avctx->max_b_frames;
174 #if VA_CHECK_VERSION(0,32,0)
175     pic_param->sequence_fields.bits.profile                         = v->profile;
176 #endif
177     pic_param->coded_width                                          = s->avctx->coded_width;
178     pic_param->coded_height                                         = s->avctx->coded_height;
179     pic_param->entrypoint_fields.value                              = 0; /* reset all bits */
180     pic_param->entrypoint_fields.bits.broken_link                   = v->broken_link;
181     pic_param->entrypoint_fields.bits.closed_entry                  = v->closed_entry;
182     pic_param->entrypoint_fields.bits.panscan_flag                  = v->panscanflag;
183     pic_param->entrypoint_fields.bits.loopfilter                    = s->loop_filter;
184     pic_param->conditional_overlap_flag                             = v->condover;
185     pic_param->fast_uvmc_flag                                       = v->fastuvmc;
186     pic_param->range_mapping_fields.value                           = 0; /* reset all bits */
187     pic_param->range_mapping_fields.bits.luma_flag                  = v->range_mapy_flag;
188     pic_param->range_mapping_fields.bits.luma                       = v->range_mapy;
189     pic_param->range_mapping_fields.bits.chroma_flag                = v->range_mapuv_flag;
190     pic_param->range_mapping_fields.bits.chroma                     = v->range_mapuv;
191     pic_param->b_picture_fraction                                   = v->bfraction_lut_index;
192     pic_param->cbp_table                                            = v->cbpcy_vlc ? v->cbpcy_vlc - ff_vc1_cbpcy_p_vlc : 0;
193     pic_param->mb_mode_table                                        = 0; /* XXX: interlaced frame */
194     pic_param->range_reduction_frame                                = v->rangeredfrm;
195     pic_param->rounding_control                                     = v->rnd;
196     pic_param->post_processing                                      = v->postproc;
197     pic_param->picture_resolution_index                             = v->respic;
198     pic_param->luma_scale                                           = v->lumscale;
199     pic_param->luma_shift                                           = v->lumshift;
200     pic_param->picture_fields.value                                 = 0; /* reset all bits */
201     pic_param->picture_fields.bits.picture_type                     = vc1_get_PTYPE(v);
202     pic_param->picture_fields.bits.frame_coding_mode                = v->fcm;
203     pic_param->picture_fields.bits.top_field_first                  = v->tff;
204     pic_param->picture_fields.bits.is_first_field                   = v->fcm == 0; /* XXX: interlaced frame */
205     pic_param->picture_fields.bits.intensity_compensation           = v->mv_mode == MV_PMODE_INTENSITY_COMP;
206     pic_param->raw_coding.value                                     = 0; /* reset all bits */
207     pic_param->raw_coding.flags.mv_type_mb                          = v->mv_type_is_raw;
208     pic_param->raw_coding.flags.direct_mb                           = v->dmb_is_raw;
209     pic_param->raw_coding.flags.skip_mb                             = v->skip_is_raw;
210     pic_param->raw_coding.flags.field_tx                            = 0; /* XXX: interlaced frame */
211     pic_param->raw_coding.flags.forward_mb                          = 0; /* XXX: interlaced frame */
212     pic_param->raw_coding.flags.ac_pred                             = v->acpred_is_raw;
213     pic_param->raw_coding.flags.overflags                           = v->overflg_is_raw;
214     pic_param->bitplane_present.value                               = 0; /* reset all bits */
215     pic_param->bitplane_present.flags.bp_mv_type_mb                 = vc1_has_MVTYPEMB_bitplane(v);
216     pic_param->bitplane_present.flags.bp_direct_mb                  = vc1_has_DIRECTMB_bitplane(v);
217     pic_param->bitplane_present.flags.bp_skip_mb                    = vc1_has_SKIPMB_bitplane(v);
218     pic_param->bitplane_present.flags.bp_field_tx                   = 0; /* XXX: interlaced frame */
219     pic_param->bitplane_present.flags.bp_forward_mb                 = 0; /* XXX: interlaced frame */
220     pic_param->bitplane_present.flags.bp_ac_pred                    = vc1_has_ACPRED_bitplane(v);
221     pic_param->bitplane_present.flags.bp_overflags                  = vc1_has_OVERFLAGS_bitplane(v);
222     pic_param->reference_fields.value                               = 0; /* reset all bits */
223     pic_param->reference_fields.bits.reference_distance_flag        = v->refdist_flag;
224     pic_param->reference_fields.bits.reference_distance             = 0; /* XXX: interlaced frame */
225     pic_param->reference_fields.bits.num_reference_pictures         = 0; /* XXX: interlaced frame */
226     pic_param->reference_fields.bits.reference_field_pic_indicator  = 0; /* XXX: interlaced frame */
227     pic_param->mv_fields.value                                      = 0; /* reset all bits */
228     pic_param->mv_fields.bits.mv_mode                               = vc1_get_MVMODE(v);
229     pic_param->mv_fields.bits.mv_mode2                              = vc1_get_MVMODE2(v);
230     pic_param->mv_fields.bits.mv_table                              = s->mv_table_index;
231     pic_param->mv_fields.bits.two_mv_block_pattern_table            = 0; /* XXX: interlaced frame */
232     pic_param->mv_fields.bits.four_mv_switch                        = 0; /* XXX: interlaced frame */
233     pic_param->mv_fields.bits.four_mv_block_pattern_table           = 0; /* XXX: interlaced frame */
234     pic_param->mv_fields.bits.extended_mv_flag                      = v->extended_mv;
235     pic_param->mv_fields.bits.extended_mv_range                     = v->mvrange;
236     pic_param->mv_fields.bits.extended_dmv_flag                     = v->extended_dmv;
237     pic_param->mv_fields.bits.extended_dmv_range                    = 0; /* XXX: interlaced frame */
238     pic_param->pic_quantizer_fields.value                           = 0; /* reset all bits */
239     pic_param->pic_quantizer_fields.bits.dquant                     = v->dquant;
240     pic_param->pic_quantizer_fields.bits.quantizer                  = v->quantizer_mode;
241     pic_param->pic_quantizer_fields.bits.half_qp                    = v->halfpq;
242     pic_param->pic_quantizer_fields.bits.pic_quantizer_scale        = v->pq;
243     pic_param->pic_quantizer_fields.bits.pic_quantizer_type         = v->pquantizer;
244     pic_param->pic_quantizer_fields.bits.dq_frame                   = v->dquantfrm;
245     pic_param->pic_quantizer_fields.bits.dq_profile                 = v->dqprofile;
246     pic_param->pic_quantizer_fields.bits.dq_sb_edge                 = v->dqprofile == DQPROFILE_SINGLE_EDGE  ? v->dqsbedge : 0;
247     pic_param->pic_quantizer_fields.bits.dq_db_edge                 = v->dqprofile == DQPROFILE_DOUBLE_EDGES ? v->dqsbedge : 0;
248     pic_param->pic_quantizer_fields.bits.dq_binary_level            = v->dqbilevel;
249     pic_param->pic_quantizer_fields.bits.alt_pic_quantizer          = v->altpq;
250     pic_param->transform_fields.value                               = 0; /* reset all bits */
251     pic_param->transform_fields.bits.variable_sized_transform_flag  = v->vstransform;
252     pic_param->transform_fields.bits.mb_level_transform_type_flag   = v->ttmbf;
253     pic_param->transform_fields.bits.frame_level_transform_type     = vc1_get_TTFRM(v);
254     pic_param->transform_fields.bits.transform_ac_codingset_idx1    = v->c_ac_table_index;
255     pic_param->transform_fields.bits.transform_ac_codingset_idx2    = v->y_ac_table_index;
256     pic_param->transform_fields.bits.intra_transform_dc_table       = v->s.dc_table_index;
257
258     switch (s->pict_type) {
259     case AV_PICTURE_TYPE_B:
260         pic_param->backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
261         // fall-through
262     case AV_PICTURE_TYPE_P:
263         pic_param->forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);
264         break;
265     }
266
267     if (pic_param->bitplane_present.value) {
268         uint8_t *bitplane;
269         const uint8_t *ff_bp[3];
270         int x, y, n;
271
272         switch (s->pict_type) {
273         case AV_PICTURE_TYPE_P:
274             ff_bp[0] = pic_param->bitplane_present.flags.bp_direct_mb  ? v->direct_mb_plane    : NULL;
275             ff_bp[1] = pic_param->bitplane_present.flags.bp_skip_mb    ? s->mbskip_table       : NULL;
276             ff_bp[2] = pic_param->bitplane_present.flags.bp_mv_type_mb ? v->mv_type_mb_plane   : NULL;
277             break;
278         case AV_PICTURE_TYPE_B:
279             if (!v->bi_type) {
280                 ff_bp[0] = pic_param->bitplane_present.flags.bp_direct_mb ? v->direct_mb_plane : NULL;
281                 ff_bp[1] = pic_param->bitplane_present.flags.bp_skip_mb   ? s->mbskip_table    : NULL;
282                 ff_bp[2] = NULL; /* XXX: interlaced frame (FORWARD plane) */
283                 break;
284             }
285             /* fall-through (BI-type) */
286         case AV_PICTURE_TYPE_I:
287             ff_bp[0] = NULL; /* XXX: interlaced frame (FIELDTX plane) */
288             ff_bp[1] = pic_param->bitplane_present.flags.bp_ac_pred    ? v->acpred_plane       : NULL;
289             ff_bp[2] = pic_param->bitplane_present.flags.bp_overflags  ? v->over_flags_plane   : NULL;
290             break;
291         default:
292             ff_bp[0] = NULL;
293             ff_bp[1] = NULL;
294             ff_bp[2] = NULL;
295             break;
296         }
297
298         bitplane = ff_vaapi_alloc_bitplane(vactx, (s->mb_width * s->mb_height + 1) / 2);
299         if (!bitplane)
300             return -1;
301
302         n = 0;
303         for (y = 0; y < s->mb_height; y++)
304             for (x = 0; x < s->mb_width; x++, n++)
305                 vc1_pack_bitplanes(bitplane, n, ff_bp, x, y, s->mb_stride);
306         if (n & 1) /* move last nibble to the high order */
307             bitplane[n/2] <<= 4;
308     }
309     return 0;
310 }
311
312 static int vaapi_vc1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
313 {
314     const VC1Context *v = avctx->priv_data;
315     const MpegEncContext *s = &v->s;
316     VASliceParameterBufferVC1 *slice_param;
317
318     /* Current bit buffer is beyond any marker for VC-1, so skip it */
319     if (avctx->codec_id == AV_CODEC_ID_VC1 && IS_MARKER(AV_RB32(buffer))) {
320         buffer += 4;
321         size -= 4;
322     }
323
324     /* Fill in VASliceParameterBufferVC1 */
325     slice_param = (VASliceParameterBufferVC1 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
326     if (!slice_param)
327         return -1;
328     slice_param->macroblock_offset       = get_bits_count(&s->gb);
329     slice_param->slice_vertical_position = s->mb_y;
330     return 0;
331 }
332
333 #if CONFIG_WMV3_VAAPI_HWACCEL
334 AVHWAccel ff_wmv3_vaapi_hwaccel = {
335     .name           = "wmv3_vaapi",
336     .type           = AVMEDIA_TYPE_VIDEO,
337     .id             = AV_CODEC_ID_WMV3,
338     .pix_fmt        = AV_PIX_FMT_VAAPI,
339     .start_frame    = vaapi_vc1_start_frame,
340     .end_frame      = ff_vaapi_mpeg_end_frame,
341     .decode_slice   = vaapi_vc1_decode_slice,
342 };
343 #endif
344
345 AVHWAccel ff_vc1_vaapi_hwaccel = {
346     .name           = "vc1_vaapi",
347     .type           = AVMEDIA_TYPE_VIDEO,
348     .id             = AV_CODEC_ID_VC1,
349     .pix_fmt        = AV_PIX_FMT_VAAPI,
350     .start_frame    = vaapi_vc1_start_frame,
351     .end_frame      = ff_vaapi_mpeg_end_frame,
352     .decode_slice   = vaapi_vc1_decode_slice,
353 };