2 * XVideo Motion Compensation
3 * Copyright (c) 2003 Ivan Kalvachev
5 * This file is part of FFmpeg.
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.
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.
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
27 #include "mpegvideo.h"
32 //X11 includes are in libavcodec/xvmc.h
33 //by replacing it with non-X one
34 //XvMC emulation could be performed
39 void XVMC_init_block(MpegEncContext *s)
41 struct xvmc_render_state * render;
42 render = (struct xvmc_render_state*)s->current_picture.data[2];
44 if (!render || (render->magic != MP_XVMC_RENDER_MAGIC)) {
46 return;//make sure that this is a render packet
48 s->block = (DCTELEM *)(render->data_blocks+(render->next_free_data_block_num)*64);
51 void XVMC_pack_pblocks(MpegEncContext *s, int cbp)
54 const int mb_block_count = 4 + (1 << s->chroma_format);
57 cbp <<= 12-mb_block_count;
58 for (i = 0; i < mb_block_count; i++) {
60 s->pblocks[i] = (short *)(&s->block[(j++)]);
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)
72 struct xvmc_render_state * render, * last, * next;
76 render = (struct xvmc_render_state*)s->current_picture.data[2];
78 if (!render || (render->magic != MP_XVMC_RENDER_MAGIC))
79 return -1;//make sure that this is render packet
81 render->picture_structure = s->picture_structure;
82 render->flags = (s->first_field) ? 0 : XVMC_SECOND_FIELD;
84 //make sure that all data is drawn by XVMC_end_frame
85 assert(render->filled_mv_blocks_num == 0);
87 render->p_future_surface = NULL;
88 render->p_past_surface = NULL;
92 return 0;// no prediction from other frames
94 next = (struct xvmc_render_state*)s->next_picture.data[2];
98 if (next->magic != MP_XVMC_RENDER_MAGIC)
100 render->p_future_surface = next->p_surface;
101 //no return here, going to set forward prediction
103 last = (struct xvmc_render_state*)s->last_picture.data[2];
104 if (!last)// && !s->first_field)
105 last = render;//predict second field from the first
106 if (last->magic != MP_XVMC_RENDER_MAGIC)
108 render->p_past_surface = last->p_surface;
115 void XVMC_field_end(MpegEncContext *s)
117 struct xvmc_render_state * render;
118 render = (struct xvmc_render_state*)s->current_picture.data[2];
121 if (render->filled_mv_blocks_num > 0)
122 ff_draw_horiz_band(s,0,0);
125 void XVMC_decode_mb(MpegEncContext *s)
127 XvMCMacroBlock * mv_block;
128 struct xvmc_render_state * render;
129 int i,cbp,blocks_per_mb;
131 const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
135 av_log(s->avctx, AV_LOG_ERROR, "XVMC doesn't support encoding!!!\n");
139 //from MPV_decode_mb(),
140 /* update DC predictors for P macroblocks */
144 s->last_dc[2] = 128 << s->intra_dc_precision;
147 //MC doesn't skip blocks
151 // Do I need to export quant when I could not perform postprocessing?
152 // Anyway, it doesn't hurt.
153 s->current_picture.qscale_table[mb_xy] = s->qscale;
155 //START OF XVMC specific code
156 render = (struct xvmc_render_state*)s->current_picture.data[2];
158 assert(render->magic==MP_XVMC_RENDER_MAGIC);
159 assert(render->mv_blocks);
161 //take the next free macroblock
162 mv_block = &render->mv_blocks[render->start_mv_blocks_num +
163 render->filled_mv_blocks_num ];
165 mv_block->x = s->mb_x;
166 mv_block->y = s->mb_y;
167 mv_block->dct_type = s->interlaced_dct;//XVMC_DCT_TYPE_FRAME/FIELD;
169 mv_block->macroblock_type = XVMC_MB_TYPE_INTRA;//no MC, all done
171 mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
173 if (s->mv_dir & MV_DIR_FORWARD) {
174 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_FORWARD;
175 //pmv[n][dir][xy]=mv[dir][n][xy]
176 mv_block->PMV[0][0][0] = s->mv[0][0][0];
177 mv_block->PMV[0][0][1] = s->mv[0][0][1];
178 mv_block->PMV[1][0][0] = s->mv[0][1][0];
179 mv_block->PMV[1][0][1] = s->mv[0][1][1];
181 if (s->mv_dir & MV_DIR_BACKWARD) {
182 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_BACKWARD;
183 mv_block->PMV[0][1][0] = s->mv[1][0][0];
184 mv_block->PMV[0][1][1] = s->mv[1][0][1];
185 mv_block->PMV[1][1][0] = s->mv[1][1][0];
186 mv_block->PMV[1][1][1] = s->mv[1][1][1];
191 mv_block->motion_type = XVMC_PREDICTION_FRAME;
194 mv_block->motion_type = XVMC_PREDICTION_16x8;
197 mv_block->motion_type = XVMC_PREDICTION_FIELD;
198 if (s->picture_structure == PICT_FRAME) {
199 mv_block->PMV[0][0][1] <<= 1;
200 mv_block->PMV[1][0][1] <<= 1;
201 mv_block->PMV[0][1][1] <<= 1;
202 mv_block->PMV[1][1][1] <<= 1;
206 mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
207 if (s->picture_structure == PICT_FRAME) {
209 mv_block->PMV[0][0][0] = s->mv[0][0][0];//top from top
210 mv_block->PMV[0][0][1] = s->mv[0][0][1]<<1;
212 mv_block->PMV[0][1][0] = s->mv[0][0][0];//bottom from bottom
213 mv_block->PMV[0][1][1] = s->mv[0][0][1]<<1;
215 mv_block->PMV[1][0][0] = s->mv[0][2][0];//dmv00, top from bottom
216 mv_block->PMV[1][0][1] = s->mv[0][2][1]<<1;//dmv01
218 mv_block->PMV[1][1][0] = s->mv[0][3][0];//dmv10, bottom from top
219 mv_block->PMV[1][1][1] = s->mv[0][3][1]<<1;//dmv11
222 mv_block->PMV[0][1][0] = s->mv[0][2][0];//dmv00
223 mv_block->PMV[0][1][1] = s->mv[0][2][1];//dmv01
230 mv_block->motion_vertical_field_select = 0;
232 //set correct field references
233 if (s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8) {
234 if (s->field_select[0][0])
235 mv_block->motion_vertical_field_select |= 1;
236 if (s->field_select[1][0])
237 mv_block->motion_vertical_field_select |= 2;
238 if (s->field_select[0][1])
239 mv_block->motion_vertical_field_select |= 4;
240 if (s->field_select[1][1])
241 mv_block->motion_vertical_field_select |= 8;
244 //time to handle data blocks;
245 mv_block->index = render->next_free_data_block_num;
248 if (s->chroma_format >= 2) {
249 blocks_per_mb = 4 + (1 << (s->chroma_format));
254 for (i = 0; i < blocks_per_mb; i++) {
256 if (s->block_last_index[i] >= 0)
260 if (s->flags & CODEC_FLAG_GRAY) {
261 if (s->mb_intra){//intra frames are always full chroma block
262 for (i = 4; i < blocks_per_mb; i++) {
263 memset(s->pblocks[i],0,sizeof(short)*8*8);//so we need to clear them
264 if (!render->unsigned_intra)
265 s->pblocks[i][0] = 1 << 10;
268 cbp &= 0xf << (blocks_per_mb - 4);
269 blocks_per_mb = 4;//luminance blocks only
272 mv_block->coded_block_pattern = cbp;
274 mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
276 for (i = 0; i < blocks_per_mb; i++) {
277 if (s->block_last_index[i] >= 0) {
278 // I do not have unsigned_intra MOCO to test, hope it is OK.
279 if ((s->mb_intra) && (render->idct || (!render->idct && !render->unsigned_intra)))
280 s->pblocks[i][0] -= 1 << 10;
282 s->dsp.idct(s->pblocks[i]);
285 //copy blocks only if the codec doesn't support pblocks reordering
286 if (s->avctx->xvmc_acceleration == 1) {
287 memcpy(&render->data_blocks[(render->next_free_data_block_num)*64],
288 s->pblocks[i],sizeof(short)*8*8);
290 render->next_free_data_block_num++;
293 render->filled_mv_blocks_num++;
295 assert(render->filled_mv_blocks_num <= render->total_number_of_mv_blocks);
296 assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
299 if (render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
300 ff_draw_horiz_band(s,0,0);