whitespace cosmetics: Put some spaces around operators for better readability.
[libav.git] / libavcodec / mpegvideo_xvmc.c
CommitLineData
302898fc
IK
1/*
2 * XVideo Motion Compensation
3 * Copyright (c) 2003 Ivan Kalvachev
4 *
b78e7197
DB
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
302898fc
IK
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
302898fc 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
302898fc
IK
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
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
302898fc
IK
20 */
21
2e7b4c84
IK
22#include <limits.h>
23
2e7b4c84
IK
24#include "avcodec.h"
25#include "dsputil.h"
26#include "mpegvideo.h"
27
28#undef NDEBUG
29#include <assert.h>
30
fd949a63 31#include "xvmc.h"
302898fc 32
a579db0c 33//set s->block
78f9a878 34void ff_xvmc_init_block(MpegEncContext *s)
148302e7 35{
7e2e870e 36 struct xvmc_render_state *render;
c96da3ed 37 render = (struct xvmc_render_state*)s->current_picture.data[2];
3ae01928 38 assert(render);
9f00a41c 39 if (!render || render->magic != AV_XVMC_RENDER_MAGIC) {
a579db0c 40 assert(0);
1f7c1d14 41 return; // make sure that this is a render packet
a579db0c 42 }
9f00a41c 43 s->block = (DCTELEM *)(render->data_blocks + render->next_free_data_block_num * 64);
a579db0c
IK
44}
45
78f9a878 46void ff_xvmc_pack_pblocks(MpegEncContext *s, int cbp)
148302e7 47{
7e2e870e 48 int i, j;
148302e7 49 const int mb_block_count = 4 + (1 << s->chroma_format);
a579db0c 50
148302e7
DB
51 j = 0;
52 cbp <<= 12-mb_block_count;
53 for (i = 0; i < mb_block_count; i++) {
4ec58e13 54 if (cbp & (1 << 11))
4742762f 55 s->pblocks[i] = (short *)(&s->block[j++]);
4ec58e13 56 else
39dba5e8 57 s->pblocks[i] = NULL;
bb270c08 58 cbp+=cbp;
a579db0c 59 }
2e7b4c84
IK
60}
61
1f7c1d14
DB
62// These functions should be called on every new field and/or frame.
63// They should be safe if they are called a few times for the same field!
78f9a878 64int ff_xvmc_field_start(MpegEncContext*s, AVCodecContext *avctx)
148302e7 65{
7e2e870e 66 struct xvmc_render_state *render, *last, *next;
2e7b4c84 67
3ae01928 68 assert(avctx);
302898fc 69
c96da3ed 70 render = (struct xvmc_render_state*)s->current_picture.data[2];
3ae01928 71 assert(render);
9f00a41c 72 if (!render || render->magic != AV_XVMC_RENDER_MAGIC)
a1db3b93 73 return -1; // make sure that this is a render packet
2e7b4c84
IK
74
75 render->picture_structure = s->picture_structure;
9f00a41c 76 render->flags = s->first_field ? 0 : XVMC_SECOND_FIELD;
2e7b4c84 77
2d7d8cc7 78 assert(render->filled_mv_blocks_num == 0);
2e7b4c84
IK
79
80 render->p_future_surface = NULL;
4ef690f5 81 render->p_past_surface = NULL;
2e7b4c84 82
7e2e870e 83 switch(s->pict_type) {
9701840b 84 case FF_I_TYPE:
1f7c1d14 85 return 0; // no prediction from other frames
9701840b 86 case FF_B_TYPE:
c96da3ed 87 next = (struct xvmc_render_state*)s->next_picture.data[2];
3ae01928
DB
88 assert(next);
89 if (!next)
148302e7 90 return -1;
ea375af8 91 if (next->magic != AV_XVMC_RENDER_MAGIC)
148302e7 92 return -1;
2e7b4c84 93 render->p_future_surface = next->p_surface;
1f7c1d14 94 // no return here, going to set forward prediction
9701840b 95 case FF_P_TYPE:
c96da3ed 96 last = (struct xvmc_render_state*)s->last_picture.data[2];
63a21bc0 97 if (!last)
1f7c1d14 98 last = render; // predict second field from the first
ea375af8 99 if (last->magic != AV_XVMC_RENDER_MAGIC)
148302e7 100 return -1;
2e7b4c84
IK
101 render->p_past_surface = last->p_surface;
102 return 0;
5e5c247a 103 }
2e7b4c84
IK
104
105return -1;
106}
107
78f9a878 108void ff_xvmc_field_end(MpegEncContext *s)
148302e7 109{
7e2e870e 110 struct xvmc_render_state *render;
c96da3ed 111 render = (struct xvmc_render_state*)s->current_picture.data[2];
3ae01928 112 assert(render);
2e7b4c84 113
148302e7 114 if (render->filled_mv_blocks_num > 0)
2e7b4c84 115 ff_draw_horiz_band(s,0,0);
2e7b4c84
IK
116}
117
78f9a878 118void ff_xvmc_decode_mb(MpegEncContext *s)
148302e7 119{
7e2e870e
DB
120 XvMCMacroBlock *mv_block;
121 struct xvmc_render_state *render;
122 int i, cbp, blocks_per_mb;
2e7b4c84 123
39dba5e8 124 const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
2e7b4c84
IK
125
126
148302e7 127 if (s->encoding) {
8ac5c1b2 128 av_log(s->avctx, AV_LOG_ERROR, "XVMC doesn't support encoding!!!\n");
61b76987 129 return;
2e7b4c84
IK
130 }
131
1f7c1d14 132 // from MPV_decode_mb(), update DC predictors for P macroblocks
2e7b4c84
IK
133 if (!s->mb_intra) {
134 s->last_dc[0] =
135 s->last_dc[1] =
136 s->last_dc[2] = 128 << s->intra_dc_precision;
137 }
138
1f7c1d14 139 // MC doesn't skip blocks
160d679c 140 s->mb_skipped = 0;
2e7b4c84
IK
141
142
d15876d3
DB
143 // Do I need to export quant when I could not perform postprocessing?
144 // Anyway, it doesn't hurt.
2e7b4c84
IK
145 s->current_picture.qscale_table[mb_xy] = s->qscale;
146
a1db3b93 147 // start of XVMC-specific code
c96da3ed 148 render = (struct xvmc_render_state*)s->current_picture.data[2];
3ae01928 149 assert(render);
7e2e870e 150 assert(render->magic == AV_XVMC_RENDER_MAGIC);
2e7b4c84 151 assert(render->mv_blocks);
302898fc 152
1f7c1d14 153 // take the next free macroblock
115329f1 154 mv_block = &render->mv_blocks[render->start_mv_blocks_num +
39dba5e8 155 render->filled_mv_blocks_num ];
2e7b4c84 156
4ef690f5
DB
157 mv_block->x = s->mb_x;
158 mv_block->y = s->mb_y;
1f7c1d14 159 mv_block->dct_type = s->interlaced_dct; // XVMC_DCT_TYPE_FRAME/FIELD;
4ec58e13 160 if (s->mb_intra) {
1f7c1d14 161 mv_block->macroblock_type = XVMC_MB_TYPE_INTRA; // no MC, all done
4ec58e13 162 } else {
2e7b4c84
IK
163 mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
164
148302e7 165 if (s->mv_dir & MV_DIR_FORWARD) {
2d7d8cc7 166 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_FORWARD;
0439c09d 167 // PMV[n][dir][xy] = mv[dir][n][xy]
2e7b4c84
IK
168 mv_block->PMV[0][0][0] = s->mv[0][0][0];
169 mv_block->PMV[0][0][1] = s->mv[0][0][1];
170 mv_block->PMV[1][0][0] = s->mv[0][1][0];
171 mv_block->PMV[1][0][1] = s->mv[0][1][1];
172 }
148302e7 173 if (s->mv_dir & MV_DIR_BACKWARD) {
2d7d8cc7 174 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_BACKWARD;
2e7b4c84
IK
175 mv_block->PMV[0][1][0] = s->mv[1][0][0];
176 mv_block->PMV[0][1][1] = s->mv[1][0][1];
177 mv_block->PMV[1][1][0] = s->mv[1][1][0];
178 mv_block->PMV[1][1][1] = s->mv[1][1][1];
179 }
180
181 switch(s->mv_type){
182 case MV_TYPE_16X16:
183 mv_block->motion_type = XVMC_PREDICTION_FRAME;
184 break;
185 case MV_TYPE_16X8:
186 mv_block->motion_type = XVMC_PREDICTION_16x8;
187 break;
188 case MV_TYPE_FIELD:
189 mv_block->motion_type = XVMC_PREDICTION_FIELD;
148302e7
DB
190 if (s->picture_structure == PICT_FRAME) {
191 mv_block->PMV[0][0][1] <<= 1;
192 mv_block->PMV[1][0][1] <<= 1;
193 mv_block->PMV[0][1][1] <<= 1;
194 mv_block->PMV[1][1][1] <<= 1;
2e7b4c84
IK
195 }
196 break;
197 case MV_TYPE_DMV:
198 mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
148302e7 199 if (s->picture_structure == PICT_FRAME) {
2e7b4c84 200
1f7c1d14 201 mv_block->PMV[0][0][0] = s->mv[0][0][0]; // top from top
81189e4f 202 mv_block->PMV[0][0][1] = s->mv[0][0][1] << 1;
2e7b4c84 203
1f7c1d14 204 mv_block->PMV[0][1][0] = s->mv[0][0][0]; // bottom from bottom
81189e4f 205 mv_block->PMV[0][1][1] = s->mv[0][0][1] << 1;
2e7b4c84 206
1f7c1d14 207 mv_block->PMV[1][0][0] = s->mv[0][2][0]; // dmv00, top from bottom
81189e4f 208 mv_block->PMV[1][0][1] = s->mv[0][2][1] << 1; // dmv01
2e7b4c84 209
1f7c1d14 210 mv_block->PMV[1][1][0] = s->mv[0][3][0]; // dmv10, bottom from top
81189e4f 211 mv_block->PMV[1][1][1] = s->mv[0][3][1] << 1; // dmv11
2e7b4c84 212
4ec58e13 213 } else {
1f7c1d14
DB
214 mv_block->PMV[0][1][0] = s->mv[0][2][0]; // dmv00
215 mv_block->PMV[0][1][1] = s->mv[0][2][1]; // dmv01
2e7b4c84
IK
216 }
217 break;
218 default:
219 assert(0);
220 }
221
222 mv_block->motion_vertical_field_select = 0;
223
1f7c1d14 224 // set correct field references
148302e7 225 if (s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8) {
90509ec7 226 mv_block->motion_vertical_field_select |= s->field_select[0][0];
7e2e870e
DB
227 mv_block->motion_vertical_field_select |= s->field_select[1][0] << 1;
228 mv_block->motion_vertical_field_select |= s->field_select[0][1] << 2;
229 mv_block->motion_vertical_field_select |= s->field_select[1][1] << 3;
2e7b4c84 230 }
1f7c1d14 231 } // !intra
a1db3b93 232 // time to handle data blocks
2e7b4c84 233 mv_block->index = render->next_free_data_block_num;
5e5c247a 234
2e7b4c84 235 blocks_per_mb = 6;
148302e7 236 if (s->chroma_format >= 2) {
4742762f 237 blocks_per_mb = 4 + (1 << s->chroma_format);
2e7b4c84 238 }
5e5c247a 239
1f7c1d14 240 // calculate cbp
715731a3 241 cbp = 0;
148302e7 242 for (i = 0; i < blocks_per_mb; i++) {
2d7d8cc7 243 cbp += cbp;
148302e7 244 if (s->block_last_index[i] >= 0)
715731a3
IK
245 cbp++;
246 }
115329f1 247
148302e7 248 if (s->flags & CODEC_FLAG_GRAY) {
a1db3b93 249 if (s->mb_intra) { // intra frames are always full chroma blocks
148302e7 250 for (i = 4; i < blocks_per_mb; i++) {
7e2e870e 251 memset(s->pblocks[i], 0, sizeof(short)*8*8); // so we need to clear them
148302e7
DB
252 if (!render->unsigned_intra)
253 s->pblocks[i][0] = 1 << 10;
a579db0c 254 }
4ec58e13 255 } else {
148302e7 256 cbp &= 0xf << (blocks_per_mb - 4);
1f7c1d14 257 blocks_per_mb = 4; // luminance blocks only
715731a3 258 }
a579db0c 259 }
2e7b4c84 260 mv_block->coded_block_pattern = cbp;
148302e7 261 if (cbp == 0)
2e7b4c84
IK
262 mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
263
148302e7
DB
264 for (i = 0; i < blocks_per_mb; i++) {
265 if (s->block_last_index[i] >= 0) {
7a74e067 266 // I do not have unsigned_intra MOCO to test, hope it is OK.
eba9cecc 267 if (s->mb_intra && (render->idct || (!render->idct && !render->unsigned_intra)))
148302e7
DB
268 s->pblocks[i][0] -= 1 << 10;
269 if (!render->idct) {
a579db0c 270 s->dsp.idct(s->pblocks[i]);
a1db3b93
DB
271 /* It is unclear if MC hardware requires pixel diff values to be
272 * in the range [-255;255]. TODO: Clipping if such hardware is
273 * ever found. As of now it would only be an unnecessary
274 * slowdown. */
2e7b4c84 275 }
1f7c1d14 276 // copy blocks only if the codec doesn't support pblocks reordering
148302e7 277 if (s->avctx->xvmc_acceleration == 1) {
4742762f 278 memcpy(&render->data_blocks[render->next_free_data_block_num*64],
39dba5e8 279 s->pblocks[i],sizeof(short)*8*8);
a579db0c
IK
280 }
281 render->next_free_data_block_num++;
2e7b4c84
IK
282 }
283 }
284 render->filled_mv_blocks_num++;
285
4ef690f5 286 assert(render->filled_mv_blocks_num <= render->total_number_of_mv_blocks);
2e7b4c84
IK
287 assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
288
289
148302e7 290 if (render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
7e2e870e 291 ff_draw_horiz_band(s, 0, 0);
2e7b4c84 292}