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
26 #include "mpegvideo.h"
34 void ff_xvmc_init_block(MpegEncContext *s)
36 struct xvmc_render_state *render;
37 render = (struct xvmc_render_state*)s->current_picture.data[2];
39 if (!render || render->magic != AV_XVMC_RENDER_MAGIC) {
41 return; // make sure that this is a render packet
43 s->block = (DCTELEM *)(render->data_blocks + render->next_free_data_block_num * 64);
46 void ff_xvmc_pack_pblocks(MpegEncContext *s, int cbp)
49 const int mb_block_count = 4 + (1 << s->chroma_format);
52 cbp <<= 12-mb_block_count;
53 for (i = 0; i < mb_block_count; i++) {
55 s->pblocks[i] = (short *)(&s->block[j++]);
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!
64 int ff_xvmc_field_start(MpegEncContext*s, AVCodecContext *avctx)
66 struct xvmc_render_state *render, *last, *next;
70 render = (struct xvmc_render_state*)s->current_picture.data[2];
72 if (!render || render->magic != AV_XVMC_RENDER_MAGIC)
73 return -1; // make sure that this is a render packet
75 render->picture_structure = s->picture_structure;
76 render->flags = s->first_field ? 0 : XVMC_SECOND_FIELD;
78 assert(render->filled_mv_blocks_num == 0);
80 render->p_future_surface = NULL;
81 render->p_past_surface = NULL;
83 switch(s->pict_type) {
85 return 0; // no prediction from other frames
87 next = (struct xvmc_render_state*)s->next_picture.data[2];
91 if (next->magic != AV_XVMC_RENDER_MAGIC)
93 render->p_future_surface = next->p_surface;
94 // no return here, going to set forward prediction
96 last = (struct xvmc_render_state*)s->last_picture.data[2];
98 last = render; // predict second field from the first
99 if (last->magic != AV_XVMC_RENDER_MAGIC)
101 render->p_past_surface = last->p_surface;
108 void ff_xvmc_field_end(MpegEncContext *s)
110 struct xvmc_render_state *render;
111 render = (struct xvmc_render_state*)s->current_picture.data[2];
114 if (render->filled_mv_blocks_num > 0)
115 ff_draw_horiz_band(s,0,0);
118 void ff_xvmc_decode_mb(MpegEncContext *s)
120 XvMCMacroBlock *mv_block;
121 struct xvmc_render_state *render;
122 int i, cbp, blocks_per_mb;
124 const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
128 av_log(s->avctx, AV_LOG_ERROR, "XVMC doesn't support encoding!!!\n");
132 // from MPV_decode_mb(), update DC predictors for P macroblocks
136 s->last_dc[2] = 128 << s->intra_dc_precision;
139 // MC doesn't skip blocks
143 // Do I need to export quant when I could not perform postprocessing?
144 // Anyway, it doesn't hurt.
145 s->current_picture.qscale_table[mb_xy] = s->qscale;
147 // start of XVMC-specific code
148 render = (struct xvmc_render_state*)s->current_picture.data[2];
150 assert(render->magic == AV_XVMC_RENDER_MAGIC);
151 assert(render->mv_blocks);
153 // take the next free macroblock
154 mv_block = &render->mv_blocks[render->start_mv_blocks_num +
155 render->filled_mv_blocks_num ];
157 mv_block->x = s->mb_x;
158 mv_block->y = s->mb_y;
159 mv_block->dct_type = s->interlaced_dct; // XVMC_DCT_TYPE_FRAME/FIELD;
161 mv_block->macroblock_type = XVMC_MB_TYPE_INTRA; // no MC, all done
163 mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
165 if (s->mv_dir & MV_DIR_FORWARD) {
166 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_FORWARD;
167 // PMV[n][dir][xy] = mv[dir][n][xy]
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];
173 if (s->mv_dir & MV_DIR_BACKWARD) {
174 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_BACKWARD;
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];
183 mv_block->motion_type = XVMC_PREDICTION_FRAME;
186 mv_block->motion_type = XVMC_PREDICTION_16x8;
189 mv_block->motion_type = XVMC_PREDICTION_FIELD;
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;
198 mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
199 if (s->picture_structure == PICT_FRAME) {
201 mv_block->PMV[0][0][0] = s->mv[0][0][0]; // top from top
202 mv_block->PMV[0][0][1] = s->mv[0][0][1]<<1;
204 mv_block->PMV[0][1][0] = s->mv[0][0][0]; // bottom from bottom
205 mv_block->PMV[0][1][1] = s->mv[0][0][1]<<1;
207 mv_block->PMV[1][0][0] = s->mv[0][2][0]; // dmv00, top from bottom
208 mv_block->PMV[1][0][1] = s->mv[0][2][1]<<1; // dmv01
210 mv_block->PMV[1][1][0] = s->mv[0][3][0]; // dmv10, bottom from top
211 mv_block->PMV[1][1][1] = s->mv[0][3][1]<<1; // dmv11
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
222 mv_block->motion_vertical_field_select = 0;
224 // set correct field references
225 if (s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8) {
226 mv_block->motion_vertical_field_select |= s->field_select[0][0];
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;
232 // time to handle data blocks
233 mv_block->index = render->next_free_data_block_num;
236 if (s->chroma_format >= 2) {
237 blocks_per_mb = 4 + (1 << s->chroma_format);
242 for (i = 0; i < blocks_per_mb; i++) {
244 if (s->block_last_index[i] >= 0)
248 if (s->flags & CODEC_FLAG_GRAY) {
249 if (s->mb_intra) { // intra frames are always full chroma blocks
250 for (i = 4; i < blocks_per_mb; i++) {
251 memset(s->pblocks[i], 0, sizeof(short)*8*8); // so we need to clear them
252 if (!render->unsigned_intra)
253 s->pblocks[i][0] = 1 << 10;
256 cbp &= 0xf << (blocks_per_mb - 4);
257 blocks_per_mb = 4; // luminance blocks only
260 mv_block->coded_block_pattern = cbp;
262 mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
264 for (i = 0; i < blocks_per_mb; i++) {
265 if (s->block_last_index[i] >= 0) {
266 // I do not have unsigned_intra MOCO to test, hope it is OK.
267 if (s->mb_intra && (render->idct || (!render->idct && !render->unsigned_intra)))
268 s->pblocks[i][0] -= 1 << 10;
270 s->dsp.idct(s->pblocks[i]);
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
276 // copy blocks only if the codec doesn't support pblocks reordering
277 if (s->avctx->xvmc_acceleration == 1) {
278 memcpy(&render->data_blocks[render->next_free_data_block_num*64],
279 s->pblocks[i],sizeof(short)*8*8);
281 render->next_free_data_block_num++;
284 render->filled_mv_blocks_num++;
286 assert(render->filled_mv_blocks_num <= render->total_number_of_mv_blocks);
287 assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
290 if (render->filled_mv_blocks_num >= render->total_number_of_mv_blocks)
291 ff_draw_horiz_band(s, 0, 0);