Remove completely unsed structure fields mc_type and chroma_format.
[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 #include "avcodec.h"
25 #include "dsputil.h"
26 #include "mpegvideo.h"
27
28 #undef NDEBUG
29 #include <assert.h>
30
31 #include "xvmc.h"
32 #include "xvmc_internal.h"
33
34 //set s->block
35 void ff_xvmc_init_block(MpegEncContext *s)
36 {
37 struct xvmc_render_state *render = (struct xvmc_render_state*)s->current_picture.data[2];
38 assert(render);
39 if (!render || render->magic != AV_XVMC_RENDER_MAGIC) {
40 assert(0);
41 return; // make sure that this is a render packet
42 }
43 s->block = (DCTELEM *)(render->data_blocks + render->next_free_data_block_num * 64);
44 }
45
46 void ff_xvmc_pack_pblocks(MpegEncContext *s, int cbp)
47 {
48 int i, j = 0;
49 const int mb_block_count = 4 + (1 << s->chroma_format);
50
51 cbp <<= 12-mb_block_count;
52 for (i = 0; i < mb_block_count; i++) {
53 if (cbp & (1 << 11))
54 s->pblocks[i] = (short *)(&s->block[j++]);
55 else
56 s->pblocks[i] = NULL;
57 cbp+=cbp;
58 }
59 }
60
61 /**
62 * This function should be called for every new field and/or frame.
63 * It should be safe to call the function a few times for the same field.
64 */
65 int ff_xvmc_field_start(MpegEncContext*s, AVCodecContext *avctx)
66 {
67 struct xvmc_render_state *last, *next, *render = (struct xvmc_render_state*)s->current_picture.data[2];
68
69 assert(avctx);
70 assert(render);
71 if (!render || render->magic != AV_XVMC_RENDER_MAGIC)
72 return -1; // make sure that this is a render packet
73
74 render->picture_structure = s->picture_structure;
75 render->flags = s->first_field ? 0 : XVMC_SECOND_FIELD;
76
77 if (render->filled_mv_blocks_num) {
78 av_log(avctx, AV_LOG_ERROR,
79 "Rendering surface contains %i unprocessed blocks\n",
80 render->filled_mv_blocks_num);
81 return -1;
82 }
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);
93 if (!next)
94 return -1;
95 if (next->magic != AV_XVMC_RENDER_MAGIC)
96 return -1;
97 render->p_future_surface = next->p_surface;
98 // no return here, going to set forward prediction
99 case FF_P_TYPE:
100 last = (struct xvmc_render_state*)s->last_picture.data[2];
101 if (!last)
102 last = render; // predict second field from the first
103 if (last->magic != AV_XVMC_RENDER_MAGIC)
104 return -1;
105 render->p_past_surface = last->p_surface;
106 return 0;
107 }
108
109 return -1;
110 }
111
112 /**
113 * This function should be called for every new field and/or frame.
114 * It should be safe to call the function a few times for the same field.
115 */
116 void ff_xvmc_field_end(MpegEncContext *s)
117 {
118 struct xvmc_render_state *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 ff_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(), update DC predictors for P macroblocks
140 if (!s->mb_intra) {
141 s->last_dc[0] =
142 s->last_dc[1] =
143 s->last_dc[2] = 128 << s->intra_dc_precision;
144 }
145
146 // MC doesn't skip blocks
147 s->mb_skipped = 0;
148
149
150 // Do I need to export quant when I could not perform postprocessing?
151 // Anyway, it doesn't hurt.
152 s->current_picture.qscale_table[mb_xy] = s->qscale;
153
154 // start of XVMC-specific code
155 render = (struct xvmc_render_state*)s->current_picture.data[2];
156 assert(render);
157 assert(render->magic == AV_XVMC_RENDER_MAGIC);
158 assert(render->mv_blocks);
159
160 // take the next free macroblock
161 mv_block = &render->mv_blocks[render->start_mv_blocks_num +
162 render->filled_mv_blocks_num];
163
164 mv_block->x = s->mb_x;
165 mv_block->y = s->mb_y;
166 mv_block->dct_type = s->interlaced_dct; // XVMC_DCT_TYPE_FRAME/FIELD;
167 if (s->mb_intra) {
168 mv_block->macroblock_type = XVMC_MB_TYPE_INTRA; // no MC, all done
169 } else {
170 mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
171
172 if (s->mv_dir & MV_DIR_FORWARD) {
173 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_FORWARD;
174 // PMV[n][dir][xy] = mv[dir][n][xy]
175 mv_block->PMV[0][0][0] = s->mv[0][0][0];
176 mv_block->PMV[0][0][1] = s->mv[0][0][1];
177 mv_block->PMV[1][0][0] = s->mv[0][1][0];
178 mv_block->PMV[1][0][1] = s->mv[0][1][1];
179 }
180 if (s->mv_dir & MV_DIR_BACKWARD) {
181 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_BACKWARD;
182 mv_block->PMV[0][1][0] = s->mv[1][0][0];
183 mv_block->PMV[0][1][1] = s->mv[1][0][1];
184 mv_block->PMV[1][1][0] = s->mv[1][1][0];
185 mv_block->PMV[1][1][1] = s->mv[1][1][1];
186 }
187
188 switch(s->mv_type) {
189 case MV_TYPE_16X16:
190 mv_block->motion_type = XVMC_PREDICTION_FRAME;
191 break;
192 case MV_TYPE_16X8:
193 mv_block->motion_type = XVMC_PREDICTION_16x8;
194 break;
195 case MV_TYPE_FIELD:
196 mv_block->motion_type = XVMC_PREDICTION_FIELD;
197 if (s->picture_structure == PICT_FRAME) {
198 mv_block->PMV[0][0][1] <<= 1;
199 mv_block->PMV[1][0][1] <<= 1;
200 mv_block->PMV[0][1][1] <<= 1;
201 mv_block->PMV[1][1][1] <<= 1;
202 }
203 break;
204 case MV_TYPE_DMV:
205 mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
206 if (s->picture_structure == PICT_FRAME) {
207
208 mv_block->PMV[0][0][0] = s->mv[0][0][0]; // top from top
209 mv_block->PMV[0][0][1] = s->mv[0][0][1] << 1;
210
211 mv_block->PMV[0][1][0] = s->mv[0][0][0]; // bottom from bottom
212 mv_block->PMV[0][1][1] = s->mv[0][0][1] << 1;
213
214 mv_block->PMV[1][0][0] = s->mv[0][2][0]; // dmv00, top from bottom
215 mv_block->PMV[1][0][1] = s->mv[0][2][1] << 1; // dmv01
216
217 mv_block->PMV[1][1][0] = s->mv[0][3][0]; // dmv10, bottom from top
218 mv_block->PMV[1][1][1] = s->mv[0][3][1] << 1; // dmv11
219
220 } else {
221 mv_block->PMV[0][1][0] = s->mv[0][2][0]; // dmv00
222 mv_block->PMV[0][1][1] = s->mv[0][2][1]; // dmv01
223 }
224 break;
225 default:
226 assert(0);
227 }
228
229 mv_block->motion_vertical_field_select = 0;
230
231 // set correct field references
232 if (s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8) {
233 mv_block->motion_vertical_field_select |= s->field_select[0][0];
234 mv_block->motion_vertical_field_select |= s->field_select[1][0] << 1;
235 mv_block->motion_vertical_field_select |= s->field_select[0][1] << 2;
236 mv_block->motion_vertical_field_select |= s->field_select[1][1] << 3;
237 }
238 } // !intra
239 // time to handle data blocks
240 mv_block->index = render->next_free_data_block_num;
241
242 blocks_per_mb = 6;
243 if (s->chroma_format >= 2) {
244 blocks_per_mb = 4 + (1 << s->chroma_format);
245 }
246
247 // calculate cbp
248 cbp = 0;
249 for (i = 0; i < blocks_per_mb; i++) {
250 cbp += cbp;
251 if (s->block_last_index[i] >= 0)
252 cbp++;
253 }
254
255 if (s->flags & CODEC_FLAG_GRAY) {
256 if (s->mb_intra) { // intra frames are always full chroma blocks
257 for (i = 4; i < blocks_per_mb; i++) {
258 memset(s->pblocks[i], 0, sizeof(short)*64); // so we need to clear them
259 if (!render->unsigned_intra)
260 s->pblocks[i][0] = 1 << 10;
261 }
262 } else {
263 cbp &= 0xf << (blocks_per_mb - 4);
264 blocks_per_mb = 4; // luminance blocks only
265 }
266 }
267 mv_block->coded_block_pattern = cbp;
268 if (cbp == 0)
269 mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
270
271 for (i = 0; i < blocks_per_mb; i++) {
272 if (s->block_last_index[i] >= 0) {
273 // I do not have unsigned_intra MOCO to test, hope it is OK.
274 if (s->mb_intra && (render->idct || (!render->idct && !render->unsigned_intra)))
275 s->pblocks[i][0] -= 1 << 10;
276 if (!render->idct) {
277 s->dsp.idct(s->pblocks[i]);
278 /* It is unclear if MC hardware requires pixel diff values to be
279 * in the range [-255;255]. TODO: Clipping if such hardware is
280 * ever found. As of now it would only be an unnecessary
281 * slowdown. */
282 }
283 // copy blocks only if the codec doesn't support pblocks reordering
284 if (s->avctx->xvmc_acceleration == 1) {
285 memcpy(&render->data_blocks[render->next_free_data_block_num*64],
286 s->pblocks[i], sizeof(short)*64);
287 }
288 render->next_free_data_block_num++;
289 }
290 }
291 render->filled_mv_blocks_num++;
292
293 assert(render->filled_mv_blocks_num <= render->total_number_of_mv_blocks);
294 assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
295 /* The above conditions should not be able to fail as long as this function
296 * is used and the following 'if ()' automatically calls a callback to free
297 * blocks. */
298
299
300 if (render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
301 ff_draw_horiz_band(s, 0, 0);
302 }