whitespace cosmetics: another round of formatting consistency fixes
[libav.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 != NULL);
44 if ((render == NULL) || (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 != NULL);
75
76 render = (struct xvmc_render_state*)s->current_picture.data[2];
77 assert(render != NULL);
78 if ((render == NULL) || (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!=NULL);
96 assert(next->state & MP_XVMC_STATE_PREDICTION);
97 if (next == NULL)
98 return -1;
99 if (next->magic != MP_XVMC_RENDER_MAGIC)
100 return -1;
101 render->p_future_surface = next->p_surface;
102 //no return here, going to set forward prediction
103 case FF_P_TYPE:
104 last = (struct xvmc_render_state*)s->last_picture.data[2];
105 if (last == NULL)// && !s->first_field)
106 last = render;//predict second field from the first
107 if (last->magic != MP_XVMC_RENDER_MAGIC)
108 return -1;
109 assert(last->state & MP_XVMC_STATE_PREDICTION);
110 render->p_past_surface = last->p_surface;
111 return 0;
112 }
113
114 return -1;
115 }
116
117 void XVMC_field_end(MpegEncContext *s)
118 {
119 struct xvmc_render_state * render;
120 render = (struct xvmc_render_state*)s->current_picture.data[2];
121 assert(render != NULL);
122
123 if (render->filled_mv_blocks_num > 0)
124 ff_draw_horiz_band(s,0,0);
125 }
126
127 void XVMC_decode_mb(MpegEncContext *s)
128 {
129 XvMCMacroBlock * mv_block;
130 struct xvmc_render_state * render;
131 int i,cbp,blocks_per_mb;
132
133 const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
134
135
136 if (s->encoding) {
137 av_log(s->avctx, AV_LOG_ERROR, "XVMC doesn't support encoding!!!\n");
138 return;
139 }
140
141 //from MPV_decode_mb(),
142 /* update DC predictors for P macroblocks */
143 if (!s->mb_intra) {
144 s->last_dc[0] =
145 s->last_dc[1] =
146 s->last_dc[2] = 128 << s->intra_dc_precision;
147 }
148
149 //MC doesn't skip blocks
150 s->mb_skipped = 0;
151
152
153 // Do I need to export quant when I could not perform postprocessing?
154 // Anyway, it doesn't hurt.
155 s->current_picture.qscale_table[mb_xy] = s->qscale;
156
157 //START OF XVMC specific code
158 render = (struct xvmc_render_state*)s->current_picture.data[2];
159 assert(render!=NULL);
160 assert(render->magic==MP_XVMC_RENDER_MAGIC);
161 assert(render->mv_blocks);
162
163 //take the next free macroblock
164 mv_block = &render->mv_blocks[render->start_mv_blocks_num +
165 render->filled_mv_blocks_num ];
166
167 mv_block->x = s->mb_x;
168 mv_block->y = s->mb_y;
169 mv_block->dct_type = s->interlaced_dct;//XVMC_DCT_TYPE_FRAME/FIELD;
170 if (s->mb_intra){
171 mv_block->macroblock_type = XVMC_MB_TYPE_INTRA;//no MC, all done
172 }else{
173 mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
174
175 if (s->mv_dir & MV_DIR_FORWARD) {
176 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_FORWARD;
177 //pmv[n][dir][xy]=mv[dir][n][xy]
178 mv_block->PMV[0][0][0] = s->mv[0][0][0];
179 mv_block->PMV[0][0][1] = s->mv[0][0][1];
180 mv_block->PMV[1][0][0] = s->mv[0][1][0];
181 mv_block->PMV[1][0][1] = s->mv[0][1][1];
182 }
183 if (s->mv_dir & MV_DIR_BACKWARD) {
184 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_BACKWARD;
185 mv_block->PMV[0][1][0] = s->mv[1][0][0];
186 mv_block->PMV[0][1][1] = s->mv[1][0][1];
187 mv_block->PMV[1][1][0] = s->mv[1][1][0];
188 mv_block->PMV[1][1][1] = s->mv[1][1][1];
189 }
190
191 switch(s->mv_type){
192 case MV_TYPE_16X16:
193 mv_block->motion_type = XVMC_PREDICTION_FRAME;
194 break;
195 case MV_TYPE_16X8:
196 mv_block->motion_type = XVMC_PREDICTION_16x8;
197 break;
198 case MV_TYPE_FIELD:
199 mv_block->motion_type = XVMC_PREDICTION_FIELD;
200 if (s->picture_structure == PICT_FRAME) {
201 mv_block->PMV[0][0][1] <<= 1;
202 mv_block->PMV[1][0][1] <<= 1;
203 mv_block->PMV[0][1][1] <<= 1;
204 mv_block->PMV[1][1][1] <<= 1;
205 }
206 break;
207 case MV_TYPE_DMV:
208 mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
209 if (s->picture_structure == PICT_FRAME) {
210
211 mv_block->PMV[0][0][0] = s->mv[0][0][0];//top from top
212 mv_block->PMV[0][0][1] = s->mv[0][0][1]<<1;
213
214 mv_block->PMV[0][1][0] = s->mv[0][0][0];//bottom from bottom
215 mv_block->PMV[0][1][1] = s->mv[0][0][1]<<1;
216
217 mv_block->PMV[1][0][0] = s->mv[0][2][0];//dmv00, top from bottom
218 mv_block->PMV[1][0][1] = s->mv[0][2][1]<<1;//dmv01
219
220 mv_block->PMV[1][1][0] = s->mv[0][3][0];//dmv10, bottom from top
221 mv_block->PMV[1][1][1] = s->mv[0][3][1]<<1;//dmv11
222
223 }else{
224 mv_block->PMV[0][1][0] = s->mv[0][2][0];//dmv00
225 mv_block->PMV[0][1][1] = s->mv[0][2][1];//dmv01
226 }
227 break;
228 default:
229 assert(0);
230 }
231
232 mv_block->motion_vertical_field_select = 0;
233
234 //set correct field references
235 if (s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8) {
236 if (s->field_select[0][0])
237 mv_block->motion_vertical_field_select |= 1;
238 if (s->field_select[1][0])
239 mv_block->motion_vertical_field_select |= 2;
240 if (s->field_select[0][1])
241 mv_block->motion_vertical_field_select |= 4;
242 if (s->field_select[1][1])
243 mv_block->motion_vertical_field_select |= 8;
244 }
245 }//!intra
246 //time to handle data blocks;
247 mv_block->index = render->next_free_data_block_num;
248
249 blocks_per_mb = 6;
250 if (s->chroma_format >= 2) {
251 blocks_per_mb = 4 + (1 << (s->chroma_format));
252 }
253
254 // calculate cbp
255 cbp = 0;
256 for (i = 0; i < blocks_per_mb; i++) {
257 cbp += cbp;
258 if (s->block_last_index[i] >= 0)
259 cbp++;
260 }
261
262 if (s->flags & CODEC_FLAG_GRAY) {
263 if (s->mb_intra){//intra frames are always full chroma block
264 for (i = 4; i < blocks_per_mb; i++) {
265 memset(s->pblocks[i],0,sizeof(short)*8*8);//so we need to clear them
266 if (!render->unsigned_intra)
267 s->pblocks[i][0] = 1 << 10;
268 }
269 }else{
270 cbp &= 0xf << (blocks_per_mb - 4);
271 blocks_per_mb = 4;//luminance blocks only
272 }
273 }
274 mv_block->coded_block_pattern = cbp;
275 if (cbp == 0)
276 mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
277
278 for (i = 0; i < blocks_per_mb; i++) {
279 if (s->block_last_index[i] >= 0) {
280 // I do not have unsigned_intra MOCO to test, hope it is OK.
281 if ((s->mb_intra) && (render->idct || (!render->idct && !render->unsigned_intra)))
282 s->pblocks[i][0] -= 1 << 10;
283 if (!render->idct) {
284 s->dsp.idct(s->pblocks[i]);
285 //!!TODO!clip!!!
286 }
287 //copy blocks only if the codec doesn't support pblocks reordering
288 if (s->avctx->xvmc_acceleration == 1) {
289 memcpy(&render->data_blocks[(render->next_free_data_block_num)*64],
290 s->pblocks[i],sizeof(short)*8*8);
291 }
292 render->next_free_data_block_num++;
293 }
294 }
295 render->filled_mv_blocks_num++;
296
297 assert(render->filled_mv_blocks_num <= render->total_number_of_mv_blocks);
298 assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
299
300
301 if (render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
302 ff_draw_horiz_band(s,0,0);
303 }