Remove commented-out code.
[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     struct xvmc_render_state * render;
41     render = (struct xvmc_render_state*)s->current_picture.data[2];
42     assert(render != NULL);
43     if( (render == NULL) || (render->magic != MP_XVMC_RENDER_MAGIC) ){
44         assert(0);
45         return;//make sure that this is a render packet
46     }
47     s->block =(DCTELEM *)(render->data_blocks+(render->next_free_data_block_num)*64);
48 }
49
50 void XVMC_pack_pblocks(MpegEncContext *s, int cbp){
51 int i,j;
52 const int mb_block_count = 4+(1<<s->chroma_format);
53
54     j=0;
55     cbp<<= 12-mb_block_count;
56     for(i=0; i<mb_block_count; i++){
57         if(cbp & (1<<11)) {
58            s->pblocks[i] = (short *)(&s->block[(j++)]);
59         }else{
60            s->pblocks[i] = NULL;
61         }
62         cbp+=cbp;
63     }
64 }
65
66 //These functions should be called on every new field and/or frame.
67 //They should be safe if they are called a few times for the same field!
68 int XVMC_field_start(MpegEncContext*s, AVCodecContext *avctx){
69     struct xvmc_render_state * render, * last, * next;
70
71     assert(avctx != NULL);
72
73     render = (struct xvmc_render_state*)s->current_picture.data[2];
74     assert(render != NULL);
75     if( (render == NULL) || (render->magic != MP_XVMC_RENDER_MAGIC) )
76         return -1;//make sure that this is render packet
77
78     render->picture_structure = s->picture_structure;
79     render->flags = (s->first_field)? 0: XVMC_SECOND_FIELD;
80
81 //make sure that all data is drawn by XVMC_end_frame
82     assert(render->filled_mv_blocks_num==0);
83
84     render->p_future_surface = NULL;
85     render->p_past_surface = NULL;
86
87     switch(s->pict_type){
88         case  FF_I_TYPE:
89             return 0;// no prediction from other frames
90         case  FF_B_TYPE:
91             next = (struct xvmc_render_state*)s->next_picture.data[2];
92             assert(next!=NULL);
93             assert(next->state & MP_XVMC_STATE_PREDICTION);
94             if(next == NULL) return -1;
95             if(next->magic != MP_XVMC_RENDER_MAGIC) return -1;
96             render->p_future_surface = next->p_surface;
97             //no return here, going to set forward prediction
98         case  FF_P_TYPE:
99             last = (struct xvmc_render_state*)s->last_picture.data[2];
100             if(last == NULL)// && !s->first_field)
101                 last = render;//predict second field from the first
102             if(last->magic != MP_XVMC_RENDER_MAGIC) return -1;
103             assert(last->state & MP_XVMC_STATE_PREDICTION);
104             render->p_past_surface = last->p_surface;
105             return 0;
106     }
107
108 return -1;
109 }
110
111 void XVMC_field_end(MpegEncContext *s){
112     struct xvmc_render_state * render;
113     render = (struct xvmc_render_state*)s->current_picture.data[2];
114     assert(render != NULL);
115
116     if(render->filled_mv_blocks_num > 0){
117         ff_draw_horiz_band(s,0,0);
118     }
119 }
120
121 void XVMC_decode_mb(MpegEncContext *s){
122 XvMCMacroBlock * mv_block;
123 struct xvmc_render_state * render;
124 int i,cbp,blocks_per_mb;
125
126 const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
127
128
129     if(s->encoding){
130         av_log(s->avctx, AV_LOG_ERROR, "XVMC doesn't support encoding!!!\n");
131         return;
132     }
133
134    //from MPV_decode_mb(),
135     /* update DC predictors for P macroblocks */
136     if (!s->mb_intra) {
137         s->last_dc[0] =
138         s->last_dc[1] =
139         s->last_dc[2] =  128 << s->intra_dc_precision;
140     }
141
142    //MC doesn't skip blocks
143     s->mb_skipped = 0;
144
145
146    // Do I need to export quant when I could not perform postprocessing?
147    // Anyway, it doesn't hurt.
148     s->current_picture.qscale_table[mb_xy] = s->qscale;
149
150 //START OF XVMC specific code
151     render = (struct xvmc_render_state*)s->current_picture.data[2];
152     assert(render!=NULL);
153     assert(render->magic==MP_XVMC_RENDER_MAGIC);
154     assert(render->mv_blocks);
155
156     //take the next free macroblock
157     mv_block = &render->mv_blocks[render->start_mv_blocks_num +
158                                    render->filled_mv_blocks_num ];
159
160     mv_block->x = s->mb_x;
161     mv_block->y = s->mb_y;
162     mv_block->dct_type = s->interlaced_dct;//XVMC_DCT_TYPE_FRAME/FIELD;
163     if(s->mb_intra){
164         mv_block->macroblock_type = XVMC_MB_TYPE_INTRA;//no MC, all done
165     }else{
166         mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
167
168         if(s->mv_dir & MV_DIR_FORWARD){
169             mv_block->macroblock_type|= XVMC_MB_TYPE_MOTION_FORWARD;
170             //pmv[n][dir][xy]=mv[dir][n][xy]
171             mv_block->PMV[0][0][0] = s->mv[0][0][0];
172             mv_block->PMV[0][0][1] = s->mv[0][0][1];
173             mv_block->PMV[1][0][0] = s->mv[0][1][0];
174             mv_block->PMV[1][0][1] = s->mv[0][1][1];
175         }
176         if(s->mv_dir & MV_DIR_BACKWARD){
177             mv_block->macroblock_type|=XVMC_MB_TYPE_MOTION_BACKWARD;
178             mv_block->PMV[0][1][0] = s->mv[1][0][0];
179             mv_block->PMV[0][1][1] = s->mv[1][0][1];
180             mv_block->PMV[1][1][0] = s->mv[1][1][0];
181             mv_block->PMV[1][1][1] = s->mv[1][1][1];
182         }
183
184         switch(s->mv_type){
185             case  MV_TYPE_16X16:
186                 mv_block->motion_type = XVMC_PREDICTION_FRAME;
187                 break;
188             case  MV_TYPE_16X8:
189                 mv_block->motion_type = XVMC_PREDICTION_16x8;
190                 break;
191             case  MV_TYPE_FIELD:
192                 mv_block->motion_type = XVMC_PREDICTION_FIELD;
193                 if(s->picture_structure == PICT_FRAME){
194                     mv_block->PMV[0][0][1]<<=1;
195                     mv_block->PMV[1][0][1]<<=1;
196                     mv_block->PMV[0][1][1]<<=1;
197                     mv_block->PMV[1][1][1]<<=1;
198                 }
199                 break;
200             case  MV_TYPE_DMV:
201                 mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
202                 if(s->picture_structure == PICT_FRAME){
203
204                     mv_block->PMV[0][0][0] = s->mv[0][0][0];//top from top
205                     mv_block->PMV[0][0][1] = s->mv[0][0][1]<<1;
206
207                     mv_block->PMV[0][1][0] = s->mv[0][0][0];//bottom from bottom
208                     mv_block->PMV[0][1][1] = s->mv[0][0][1]<<1;
209
210                     mv_block->PMV[1][0][0] = s->mv[0][2][0];//dmv00, top from bottom
211                     mv_block->PMV[1][0][1] = s->mv[0][2][1]<<1;//dmv01
212
213                     mv_block->PMV[1][1][0] = s->mv[0][3][0];//dmv10, bottom from top
214                     mv_block->PMV[1][1][1] = s->mv[0][3][1]<<1;//dmv11
215
216                 }else{
217                     mv_block->PMV[0][1][0] = s->mv[0][2][0];//dmv00
218                     mv_block->PMV[0][1][1] = s->mv[0][2][1];//dmv01
219                 }
220                 break;
221             default:
222                 assert(0);
223         }
224
225         mv_block->motion_vertical_field_select = 0;
226
227 //set correct field references
228         if(s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8){
229             if( s->field_select[0][0] ) mv_block->motion_vertical_field_select|=1;
230             if( s->field_select[1][0] ) mv_block->motion_vertical_field_select|=2;
231             if( s->field_select[0][1] ) mv_block->motion_vertical_field_select|=4;
232             if( s->field_select[1][1] ) mv_block->motion_vertical_field_select|=8;
233         }
234     }//!intra
235 //time to handle data blocks;
236     mv_block->index = render->next_free_data_block_num;
237
238     blocks_per_mb = 6;
239     if( s->chroma_format >= 2){
240         blocks_per_mb = 4 + (1 << (s->chroma_format));
241     }
242
243 //  calculate cbp
244     cbp = 0;
245     for(i=0; i<blocks_per_mb; i++) {
246         cbp+= cbp;
247         if(s->block_last_index[i] >= 0)
248             cbp++;
249     }
250
251     if(s->flags & CODEC_FLAG_GRAY){
252         if(s->mb_intra){//intra frames are always full chroma block
253             for(i=4; i<blocks_per_mb; i++){
254                 memset(s->pblocks[i],0,sizeof(short)*8*8);//so we need to clear them
255                 if(!render->unsigned_intra)
256                     s->pblocks[i][0] = 1<<10;
257             }
258         }else{
259             cbp&= 0xf << (blocks_per_mb - 4);
260             blocks_per_mb = 4;//luminance blocks only
261         }
262     }
263     mv_block->coded_block_pattern = cbp;
264     if(cbp == 0)
265         mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
266
267     for(i=0; i<blocks_per_mb; i++){
268         if(s->block_last_index[i] >= 0){
269             // I do not have unsigned_intra MOCO to test, hope it is OK.
270             if( (s->mb_intra) && ( render->idct || (!render->idct && !render->unsigned_intra)) )
271                 s->pblocks[i][0]-=1<<10;
272             if(!render->idct){
273                 s->dsp.idct(s->pblocks[i]);
274                 //!!TODO!clip!!!
275             }
276 //copy blocks only if the codec doesn't support pblocks reordering
277             if(s->avctx->xvmc_acceleration == 1){
278                 memcpy(&render->data_blocks[(render->next_free_data_block_num)*64],
279                         s->pblocks[i],sizeof(short)*8*8);
280             }
281             render->next_free_data_block_num++;
282         }
283     }
284     render->filled_mv_blocks_num++;
285
286     assert(render->filled_mv_blocks_num <= render->total_number_of_mv_blocks);
287     assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
288
289
290     if(render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
291         ff_draw_horiz_band(s,0,0);
292 }