whitespace cosmetics: consistently format all comments
[libav.git] / libavcodec / mpegvideo_xvmc.c
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1/*
2 * XVideo Motion Compensation
3 * Copyright (c) 2003 Ivan Kalvachev
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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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,
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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
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20 */
21
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22#include <limits.h>
23
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24//avcodec include
25#include "avcodec.h"
26#include "dsputil.h"
27#include "mpegvideo.h"
28
29#undef NDEBUG
30#include <assert.h>
31
fd949a63 32#include "xvmc.h"
302898fc 33
a579db0c 34//set s->block
78f9a878 35void ff_xvmc_init_block(MpegEncContext *s)
148302e7 36{
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37 struct xvmc_render_state * render;
38 render = (struct xvmc_render_state*)s->current_picture.data[2];
3ae01928 39 assert(render);
9f00a41c 40 if (!render || render->magic != AV_XVMC_RENDER_MAGIC) {
a579db0c 41 assert(0);
1f7c1d14 42 return; // make sure that this is a render packet
a579db0c 43 }
9f00a41c 44 s->block = (DCTELEM *)(render->data_blocks + render->next_free_data_block_num * 64);
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45}
46
78f9a878 47void ff_xvmc_pack_pblocks(MpegEncContext *s, int cbp)
148302e7 48{
39dba5e8 49 int i,j;
148302e7 50 const int mb_block_count = 4 + (1 << s->chroma_format);
a579db0c 51
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52 j = 0;
53 cbp <<= 12-mb_block_count;
54 for (i = 0; i < mb_block_count; i++) {
4ec58e13 55 if (cbp & (1 << 11))
4742762f 56 s->pblocks[i] = (short *)(&s->block[j++]);
4ec58e13 57 else
39dba5e8 58 s->pblocks[i] = NULL;
bb270c08 59 cbp+=cbp;
a579db0c 60 }
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61}
62
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63// These functions should be called on every new field and/or frame.
64// They should be safe if they are called a few times for the same field!
78f9a878 65int ff_xvmc_field_start(MpegEncContext*s, AVCodecContext *avctx)
148302e7 66{
c96da3ed 67 struct xvmc_render_state * render, * last, * next;
2e7b4c84 68
3ae01928 69 assert(avctx);
302898fc 70
c96da3ed 71 render = (struct xvmc_render_state*)s->current_picture.data[2];
3ae01928 72 assert(render);
9f00a41c 73 if (!render || render->magic != AV_XVMC_RENDER_MAGIC)
1f7c1d14 74 return -1; // make sure that this is render packet
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75
76 render->picture_structure = s->picture_structure;
9f00a41c 77 render->flags = s->first_field ? 0 : XVMC_SECOND_FIELD;
2e7b4c84 78
1f7c1d14 79 // make sure that all data is drawn by XVMC_end_frame
2d7d8cc7 80 assert(render->filled_mv_blocks_num == 0);
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81
82 render->p_future_surface = NULL;
4ef690f5 83 render->p_past_surface = NULL;
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84
85 switch(s->pict_type){
9701840b 86 case FF_I_TYPE:
1f7c1d14 87 return 0; // no prediction from other frames
9701840b 88 case FF_B_TYPE:
c96da3ed 89 next = (struct xvmc_render_state*)s->next_picture.data[2];
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90 assert(next);
91 if (!next)
148302e7 92 return -1;
ea375af8 93 if (next->magic != AV_XVMC_RENDER_MAGIC)
148302e7 94 return -1;
2e7b4c84 95 render->p_future_surface = next->p_surface;
1f7c1d14 96 // no return here, going to set forward prediction
9701840b 97 case FF_P_TYPE:
c96da3ed 98 last = (struct xvmc_render_state*)s->last_picture.data[2];
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99 if (!last) // && !s->first_field)
100 last = render; // predict second field from the first
ea375af8 101 if (last->magic != AV_XVMC_RENDER_MAGIC)
148302e7 102 return -1;
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103 render->p_past_surface = last->p_surface;
104 return 0;
5e5c247a 105 }
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106
107return -1;
108}
109
78f9a878 110void ff_xvmc_field_end(MpegEncContext *s)
148302e7 111{
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112 struct xvmc_render_state * render;
113 render = (struct xvmc_render_state*)s->current_picture.data[2];
3ae01928 114 assert(render);
2e7b4c84 115
148302e7 116 if (render->filled_mv_blocks_num > 0)
2e7b4c84 117 ff_draw_horiz_band(s,0,0);
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118}
119
78f9a878 120void ff_xvmc_decode_mb(MpegEncContext *s)
148302e7 121{
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122 XvMCMacroBlock * mv_block;
123 struct xvmc_render_state * render;
124 int i,cbp,blocks_per_mb;
2e7b4c84 125
39dba5e8 126 const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
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127
128
148302e7 129 if (s->encoding) {
8ac5c1b2 130 av_log(s->avctx, AV_LOG_ERROR, "XVMC doesn't support encoding!!!\n");
61b76987 131 return;
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132 }
133
1f7c1d14 134 // from MPV_decode_mb(), update DC predictors for P macroblocks
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135 if (!s->mb_intra) {
136 s->last_dc[0] =
137 s->last_dc[1] =
138 s->last_dc[2] = 128 << s->intra_dc_precision;
139 }
140
1f7c1d14 141 // MC doesn't skip blocks
160d679c 142 s->mb_skipped = 0;
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143
144
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145 // Do I need to export quant when I could not perform postprocessing?
146 // Anyway, it doesn't hurt.
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147 s->current_picture.qscale_table[mb_xy] = s->qscale;
148
1f7c1d14 149 // START OF XVMC specific code
c96da3ed 150 render = (struct xvmc_render_state*)s->current_picture.data[2];
3ae01928 151 assert(render);
ea375af8 152 assert(render->magic==AV_XVMC_RENDER_MAGIC);
2e7b4c84 153 assert(render->mv_blocks);
302898fc 154
1f7c1d14 155 // take the next free macroblock
115329f1 156 mv_block = &render->mv_blocks[render->start_mv_blocks_num +
39dba5e8 157 render->filled_mv_blocks_num ];
2e7b4c84 158
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159 mv_block->x = s->mb_x;
160 mv_block->y = s->mb_y;
1f7c1d14 161 mv_block->dct_type = s->interlaced_dct; // XVMC_DCT_TYPE_FRAME/FIELD;
4ec58e13 162 if (s->mb_intra) {
1f7c1d14 163 mv_block->macroblock_type = XVMC_MB_TYPE_INTRA; // no MC, all done
4ec58e13 164 } else {
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165 mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
166
148302e7 167 if (s->mv_dir & MV_DIR_FORWARD) {
2d7d8cc7 168 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_FORWARD;
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169 //pmv[n][dir][xy]=mv[dir][n][xy]
170 mv_block->PMV[0][0][0] = s->mv[0][0][0];
171 mv_block->PMV[0][0][1] = s->mv[0][0][1];
172 mv_block->PMV[1][0][0] = s->mv[0][1][0];
173 mv_block->PMV[1][0][1] = s->mv[0][1][1];
174 }
148302e7 175 if (s->mv_dir & MV_DIR_BACKWARD) {
2d7d8cc7 176 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_BACKWARD;
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177 mv_block->PMV[0][1][0] = s->mv[1][0][0];
178 mv_block->PMV[0][1][1] = s->mv[1][0][1];
179 mv_block->PMV[1][1][0] = s->mv[1][1][0];
180 mv_block->PMV[1][1][1] = s->mv[1][1][1];
181 }
182
183 switch(s->mv_type){
184 case MV_TYPE_16X16:
185 mv_block->motion_type = XVMC_PREDICTION_FRAME;
186 break;
187 case MV_TYPE_16X8:
188 mv_block->motion_type = XVMC_PREDICTION_16x8;
189 break;
190 case MV_TYPE_FIELD:
191 mv_block->motion_type = XVMC_PREDICTION_FIELD;
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192 if (s->picture_structure == PICT_FRAME) {
193 mv_block->PMV[0][0][1] <<= 1;
194 mv_block->PMV[1][0][1] <<= 1;
195 mv_block->PMV[0][1][1] <<= 1;
196 mv_block->PMV[1][1][1] <<= 1;
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197 }
198 break;
199 case MV_TYPE_DMV:
200 mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
148302e7 201 if (s->picture_structure == PICT_FRAME) {
2e7b4c84 202
1f7c1d14 203 mv_block->PMV[0][0][0] = s->mv[0][0][0]; // top from top
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204 mv_block->PMV[0][0][1] = s->mv[0][0][1]<<1;
205
1f7c1d14 206 mv_block->PMV[0][1][0] = s->mv[0][0][0]; // bottom from bottom
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207 mv_block->PMV[0][1][1] = s->mv[0][0][1]<<1;
208
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209 mv_block->PMV[1][0][0] = s->mv[0][2][0]; // dmv00, top from bottom
210 mv_block->PMV[1][0][1] = s->mv[0][2][1]<<1; // dmv01
2e7b4c84 211
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212 mv_block->PMV[1][1][0] = s->mv[0][3][0]; // dmv10, bottom from top
213 mv_block->PMV[1][1][1] = s->mv[0][3][1]<<1; // dmv11
2e7b4c84 214
4ec58e13 215 } else {
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216 mv_block->PMV[0][1][0] = s->mv[0][2][0]; // dmv00
217 mv_block->PMV[0][1][1] = s->mv[0][2][1]; // dmv01
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218 }
219 break;
220 default:
221 assert(0);
222 }
223
224 mv_block->motion_vertical_field_select = 0;
225
1f7c1d14 226 // set correct field references
148302e7 227 if (s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8) {
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228 mv_block->motion_vertical_field_select |= s->field_select[0][0];
229 mv_block->motion_vertical_field_select |= s->field_select[1][0]<<1;
230 mv_block->motion_vertical_field_select |= s->field_select[0][1]<<2;
231 mv_block->motion_vertical_field_select |= s->field_select[1][1]<<3;
2e7b4c84 232 }
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233 } // !intra
234 // time to handle data blocks;
2e7b4c84 235 mv_block->index = render->next_free_data_block_num;
5e5c247a 236
2e7b4c84 237 blocks_per_mb = 6;
148302e7 238 if (s->chroma_format >= 2) {
4742762f 239 blocks_per_mb = 4 + (1 << s->chroma_format);
2e7b4c84 240 }
5e5c247a 241
1f7c1d14 242 // calculate cbp
715731a3 243 cbp = 0;
148302e7 244 for (i = 0; i < blocks_per_mb; i++) {
2d7d8cc7 245 cbp += cbp;
148302e7 246 if (s->block_last_index[i] >= 0)
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247 cbp++;
248 }
115329f1 249
148302e7 250 if (s->flags & CODEC_FLAG_GRAY) {
1f7c1d14 251 if (s->mb_intra) { // intra frames are always full chroma block
148302e7 252 for (i = 4; i < blocks_per_mb; i++) {
1f7c1d14 253 memset(s->pblocks[i],0,sizeof(short)*8*8); // so we need to clear them
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254 if (!render->unsigned_intra)
255 s->pblocks[i][0] = 1 << 10;
a579db0c 256 }
4ec58e13 257 } else {
148302e7 258 cbp &= 0xf << (blocks_per_mb - 4);
1f7c1d14 259 blocks_per_mb = 4; // luminance blocks only
715731a3 260 }
a579db0c 261 }
2e7b4c84 262 mv_block->coded_block_pattern = cbp;
148302e7 263 if (cbp == 0)
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264 mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
265
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266 for (i = 0; i < blocks_per_mb; i++) {
267 if (s->block_last_index[i] >= 0) {
7a74e067 268 // I do not have unsigned_intra MOCO to test, hope it is OK.
36c5204d 269 if (s->mb_intra && (render->idct || !render->idct && !render->unsigned_intra))
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270 s->pblocks[i][0] -= 1 << 10;
271 if (!render->idct) {
a579db0c 272 s->dsp.idct(s->pblocks[i]);
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273 /* It is unclear if MC hardware requires pixel diff values to be in
274 * range [-255;255]. TODO cliping if such hardware is ever found.
275 * As of now it would only be unnecessery slowdown. */
2e7b4c84 276 }
1f7c1d14 277 // copy blocks only if the codec doesn't support pblocks reordering
148302e7 278 if (s->avctx->xvmc_acceleration == 1) {
4742762f 279 memcpy(&render->data_blocks[render->next_free_data_block_num*64],
39dba5e8 280 s->pblocks[i],sizeof(short)*8*8);
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281 }
282 render->next_free_data_block_num++;
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283 }
284 }
285 render->filled_mv_blocks_num++;
286
4ef690f5 287 assert(render->filled_mv_blocks_num <= render->total_number_of_mv_blocks);
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288 assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
289
290
148302e7 291 if (render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
2e7b4c84 292 ff_draw_horiz_band(s,0,0);
2e7b4c84 293}