Replace all (x == NULL) or (x != NULL) in assert and if conditions by !x and x.
[ffmpeg.git] / libavcodec / mpegvideo_xvmc.c
1 /*
2  * XVideo Motion Compensation
3  * Copyright (c) 2003 Ivan Kalvachev
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 #include <limits.h>
23
24 //avcodec include
25 #include "avcodec.h"
26 #include "dsputil.h"
27 #include "mpegvideo.h"
28
29 #undef NDEBUG
30 #include <assert.h>
31
32 //X11 includes are in libavcodec/xvmc.h
33 //by replacing it with non-X one
34 //XvMC emulation could be performed
35
36 #include "xvmc.h"
37
38 //set s->block
39 void XVMC_init_block(MpegEncContext *s)
40 {
41     struct xvmc_render_state * render;
42     render = (struct xvmc_render_state*)s->current_picture.data[2];
43     assert(render);
44     if (!render || (render->magic != MP_XVMC_RENDER_MAGIC)) {
45         assert(0);
46         return;//make sure that this is a render packet
47     }
48     s->block = (DCTELEM *)(render->data_blocks+(render->next_free_data_block_num)*64);
49 }
50
51 void XVMC_pack_pblocks(MpegEncContext *s, int cbp)
52 {
53     int i,j;
54     const int mb_block_count = 4 + (1 << s->chroma_format);
55
56     j = 0;
57     cbp <<= 12-mb_block_count;
58     for (i = 0; i < mb_block_count; i++) {
59         if (cbp & (1<<11)) {
60             s->pblocks[i] = (short *)(&s->block[(j++)]);
61         }else{
62             s->pblocks[i] = NULL;
63         }
64         cbp+=cbp;
65     }
66 }
67
68 //These functions should be called on every new field and/or frame.
69 //They should be safe if they are called a few times for the same field!
70 int XVMC_field_start(MpegEncContext*s, AVCodecContext *avctx)
71 {
72     struct xvmc_render_state * render, * last, * next;
73
74     assert(avctx);
75
76     render = (struct xvmc_render_state*)s->current_picture.data[2];
77     assert(render);
78     if (!render || (render->magic != MP_XVMC_RENDER_MAGIC))
79         return -1;//make sure that this is render packet
80
81     render->picture_structure = s->picture_structure;
82     render->flags             = (s->first_field) ? 0 : XVMC_SECOND_FIELD;
83
84 //make sure that all data is drawn by XVMC_end_frame
85     assert(render->filled_mv_blocks_num == 0);
86
87     render->p_future_surface = NULL;
88     render->p_past_surface   = NULL;
89
90     switch(s->pict_type){
91         case  FF_I_TYPE:
92             return 0;// no prediction from other frames
93         case  FF_B_TYPE:
94             next = (struct xvmc_render_state*)s->next_picture.data[2];
95             assert(next);
96             if (!next)
97                 return -1;
98             if (next->magic != MP_XVMC_RENDER_MAGIC)
99                 return -1;
100             render->p_future_surface = next->p_surface;
101             //no return here, going to set forward prediction
102         case  FF_P_TYPE:
103             last = (struct xvmc_render_state*)s->last_picture.data[2];
104             if (!last)// && !s->first_field)
105                 last = render;//predict second field from the first
106             if (last->magic != MP_XVMC_RENDER_MAGIC)
107                 return -1;
108             render->p_past_surface = last->p_surface;
109             return 0;
110     }
111
112 return -1;
113 }
114
115 void XVMC_field_end(MpegEncContext *s)
116 {
117     struct xvmc_render_state * render;
118     render = (struct xvmc_render_state*)s->current_picture.data[2];
119     assert(render);
120
121     if (render->filled_mv_blocks_num > 0)
122         ff_draw_horiz_band(s,0,0);
123 }
124
125 void XVMC_decode_mb(MpegEncContext *s)
126 {
127     XvMCMacroBlock * mv_block;
128     struct xvmc_render_state * render;
129     int i,cbp,blocks_per_mb;
130
131     const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
132
133
134     if (s->encoding) {
135         av_log(s->avctx, AV_LOG_ERROR, "XVMC doesn't support encoding!!!\n");
136         return;
137     }
138
139    //from MPV_decode_mb(),
140     /* update DC predictors for P macroblocks */
141     if (!s->mb_intra) {
142         s->last_dc[0] =
143         s->last_dc[1] =
144         s->last_dc[2] =  128 << s->intra_dc_precision;
145     }
146
147    //MC doesn't skip blocks
148     s->mb_skipped = 0;
149
150
151    // Do I need to export quant when I could not perform postprocessing?
152    // Anyway, it doesn't hurt.
153     s->current_picture.qscale_table[mb_xy] = s->qscale;
154
155 //START OF XVMC specific code
156     render = (struct xvmc_render_state*)s->current_picture.data[2];
157     assert(render);
158     assert(render->magic==MP_XVMC_RENDER_MAGIC);
159     assert(render->mv_blocks);
160
161     //take the next free macroblock
162     mv_block = &render->mv_blocks[render->start_mv_blocks_num +
163                                   render->filled_mv_blocks_num ];
164
165     mv_block->x        = s->mb_x;
166     mv_block->y        = s->mb_y;
167     mv_block->dct_type = s->interlaced_dct;//XVMC_DCT_TYPE_FRAME/FIELD;
168     if (s->mb_intra){
169         mv_block->macroblock_type = XVMC_MB_TYPE_INTRA;//no MC, all done
170     }else{
171         mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
172
173         if (s->mv_dir & MV_DIR_FORWARD) {
174             mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_FORWARD;
175             //pmv[n][dir][xy]=mv[dir][n][xy]
176             mv_block->PMV[0][0][0] = s->mv[0][0][0];
177             mv_block->PMV[0][0][1] = s->mv[0][0][1];
178             mv_block->PMV[1][0][0] = s->mv[0][1][0];
179             mv_block->PMV[1][0][1] = s->mv[0][1][1];
180         }
181         if (s->mv_dir & MV_DIR_BACKWARD) {
182             mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_BACKWARD;
183             mv_block->PMV[0][1][0] = s->mv[1][0][0];
184             mv_block->PMV[0][1][1] = s->mv[1][0][1];
185             mv_block->PMV[1][1][0] = s->mv[1][1][0];
186             mv_block->PMV[1][1][1] = s->mv[1][1][1];
187         }
188
189         switch(s->mv_type){
190             case  MV_TYPE_16X16:
191                 mv_block->motion_type = XVMC_PREDICTION_FRAME;
192                 break;
193             case  MV_TYPE_16X8:
194                 mv_block->motion_type = XVMC_PREDICTION_16x8;
195                 break;
196             case  MV_TYPE_FIELD:
197                 mv_block->motion_type = XVMC_PREDICTION_FIELD;
198                 if (s->picture_structure == PICT_FRAME) {
199                     mv_block->PMV[0][0][1] <<= 1;
200                     mv_block->PMV[1][0][1] <<= 1;
201                     mv_block->PMV[0][1][1] <<= 1;
202                     mv_block->PMV[1][1][1] <<= 1;
203                 }
204                 break;
205             case  MV_TYPE_DMV:
206                 mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
207                 if (s->picture_structure == PICT_FRAME) {
208
209                     mv_block->PMV[0][0][0] = s->mv[0][0][0];//top from top
210                     mv_block->PMV[0][0][1] = s->mv[0][0][1]<<1;
211
212                     mv_block->PMV[0][1][0] = s->mv[0][0][0];//bottom from bottom
213                     mv_block->PMV[0][1][1] = s->mv[0][0][1]<<1;
214
215                     mv_block->PMV[1][0][0] = s->mv[0][2][0];//dmv00, top from bottom
216                     mv_block->PMV[1][0][1] = s->mv[0][2][1]<<1;//dmv01
217
218                     mv_block->PMV[1][1][0] = s->mv[0][3][0];//dmv10, bottom from top
219                     mv_block->PMV[1][1][1] = s->mv[0][3][1]<<1;//dmv11
220
221                 }else{
222                     mv_block->PMV[0][1][0] = s->mv[0][2][0];//dmv00
223                     mv_block->PMV[0][1][1] = s->mv[0][2][1];//dmv01
224                 }
225                 break;
226             default:
227                 assert(0);
228         }
229
230         mv_block->motion_vertical_field_select = 0;
231
232 //set correct field references
233         if (s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8) {
234             if (s->field_select[0][0])
235                 mv_block->motion_vertical_field_select |= 1;
236             if (s->field_select[1][0])
237                 mv_block->motion_vertical_field_select |= 2;
238             if (s->field_select[0][1])
239                 mv_block->motion_vertical_field_select |= 4;
240             if (s->field_select[1][1])
241                 mv_block->motion_vertical_field_select |= 8;
242         }
243     }//!intra
244 //time to handle data blocks;
245     mv_block->index = render->next_free_data_block_num;
246
247     blocks_per_mb = 6;
248     if (s->chroma_format >= 2) {
249         blocks_per_mb = 4 + (1 << (s->chroma_format));
250     }
251
252 //  calculate cbp
253     cbp = 0;
254     for (i = 0; i < blocks_per_mb; i++) {
255         cbp += cbp;
256         if (s->block_last_index[i] >= 0)
257             cbp++;
258     }
259
260     if (s->flags & CODEC_FLAG_GRAY) {
261         if (s->mb_intra){//intra frames are always full chroma block
262             for (i = 4; i < blocks_per_mb; i++) {
263                 memset(s->pblocks[i],0,sizeof(short)*8*8);//so we need to clear them
264                 if (!render->unsigned_intra)
265                     s->pblocks[i][0] = 1 << 10;
266             }
267         }else{
268             cbp &= 0xf << (blocks_per_mb - 4);
269             blocks_per_mb = 4;//luminance blocks only
270         }
271     }
272     mv_block->coded_block_pattern = cbp;
273     if (cbp == 0)
274         mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
275
276     for (i = 0; i < blocks_per_mb; i++) {
277         if (s->block_last_index[i] >= 0) {
278             // I do not have unsigned_intra MOCO to test, hope it is OK.
279             if ((s->mb_intra) && (render->idct || (!render->idct && !render->unsigned_intra)))
280                 s->pblocks[i][0] -= 1 << 10;
281             if (!render->idct) {
282                 s->dsp.idct(s->pblocks[i]);
283                 //!!TODO!clip!!!
284             }
285 //copy blocks only if the codec doesn't support pblocks reordering
286             if (s->avctx->xvmc_acceleration == 1) {
287                 memcpy(&render->data_blocks[(render->next_free_data_block_num)*64],
288                        s->pblocks[i],sizeof(short)*8*8);
289             }
290             render->next_free_data_block_num++;
291         }
292     }
293     render->filled_mv_blocks_num++;
294
295     assert(render->filled_mv_blocks_num     <= render->total_number_of_mv_blocks);
296     assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
297
298
299     if (render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
300         ff_draw_horiz_band(s,0,0);
301 }