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"
32 #include "xvmc_internal.h"
35 * Initializes the block field of the MpegEncContext pointer passed as
36 * parameter after making sure that the data is not corrupted.
38 void ff_xvmc_init_block(MpegEncContext *s)
40 struct xvmc_pixfmt_render *render = (struct xvmc_pixfmt_render*)s->current_picture.data[2];
41 assert(render && render->magic_id == AV_XVMC_RENDER_MAGIC);
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);
51 cbp <<= 12-mb_block_count;
52 for (i = 0; i < mb_block_count; i++) {
54 s->pblocks[i] = (short *)(&s->block[j++]);
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.
65 int ff_xvmc_field_start(MpegEncContext*s, AVCodecContext *avctx)
67 struct xvmc_pixfmt_render *last, *next, *render = (struct xvmc_pixfmt_render*)s->current_picture.data[2];
68 const int mb_block_count = 4 + (1 << s->chroma_format);
71 if (!render || render->magic_id != AV_XVMC_RENDER_MAGIC ||
72 !render->data_blocks || !render->mv_blocks){
73 av_log(avctx, AV_LOG_ERROR,
74 "Render token doesn't look as expected.\n");
75 return -1; // make sure that this is a render packet
78 if (render->filled_mv_blocks_num) {
79 av_log(avctx, AV_LOG_ERROR,
80 "Rendering surface contains %i unprocessed blocks.\n",
81 render->filled_mv_blocks_num);
84 if (render->total_number_of_mv_blocks < 1 ||
85 render->total_number_of_data_blocks < mb_block_count) {
86 av_log(avctx, AV_LOG_ERROR,
87 "Rendering surface doesn't provide enough block structures to work with.\n");
90 if (render->total_number_of_mv_blocks < 1 ||
91 render->total_number_of_data_blocks < mb_block_count) {
92 av_log(avctx, AV_LOG_ERROR,
93 "Rendering surface doesn't provide enough block structures to work with.\n");
97 render->picture_structure = s->picture_structure;
98 render->flags = s->first_field ? 0 : XVMC_SECOND_FIELD;
99 render->p_future_surface = NULL;
100 render->p_past_surface = NULL;
102 switch(s->pict_type) {
104 return 0; // no prediction from other frames
106 next = (struct xvmc_pixfmt_render*)s->next_picture.data[2];
109 if (next->magic_id != AV_XVMC_RENDER_MAGIC)
111 render->p_future_surface = next->p_surface;
112 // no return here, going to set forward prediction
114 last = (struct xvmc_pixfmt_render*)s->last_picture.data[2];
116 last = render; // predict second field from the first
117 if (last->magic_id != AV_XVMC_RENDER_MAGIC)
119 render->p_past_surface = last->p_surface;
127 * This function should be called for every new field and/or frame.
128 * It should be safe to call the function a few times for the same field.
130 void ff_xvmc_field_end(MpegEncContext *s)
132 struct xvmc_pixfmt_render *render = (struct xvmc_pixfmt_render*)s->current_picture.data[2];
135 if (render->filled_mv_blocks_num > 0)
136 ff_draw_horiz_band(s, 0, 0);
139 void ff_xvmc_decode_mb(MpegEncContext *s)
141 XvMCMacroBlock *mv_block;
142 struct xvmc_pixfmt_render *render;
143 int i, cbp, blocks_per_mb;
145 const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
149 av_log(s->avctx, AV_LOG_ERROR, "XVMC doesn't support encoding!!!\n");
153 // from MPV_decode_mb(), update DC predictors for P macroblocks
157 s->last_dc[2] = 128 << s->intra_dc_precision;
160 // MC doesn't skip blocks
164 // Do I need to export quant when I could not perform postprocessing?
165 // Anyway, it doesn't hurt.
166 s->current_picture.qscale_table[mb_xy] = s->qscale;
168 // start of XVMC-specific code
169 render = (struct xvmc_pixfmt_render*)s->current_picture.data[2];
171 assert(render->magic_id == AV_XVMC_RENDER_MAGIC);
172 assert(render->mv_blocks);
174 // take the next free macroblock
175 mv_block = &render->mv_blocks[render->start_mv_blocks_num +
176 render->filled_mv_blocks_num];
178 mv_block->x = s->mb_x;
179 mv_block->y = s->mb_y;
180 mv_block->dct_type = s->interlaced_dct; // XVMC_DCT_TYPE_FRAME/FIELD;
182 mv_block->macroblock_type = XVMC_MB_TYPE_INTRA; // no MC, all done
184 mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
186 if (s->mv_dir & MV_DIR_FORWARD) {
187 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_FORWARD;
188 // PMV[n][dir][xy] = mv[dir][n][xy]
189 mv_block->PMV[0][0][0] = s->mv[0][0][0];
190 mv_block->PMV[0][0][1] = s->mv[0][0][1];
191 mv_block->PMV[1][0][0] = s->mv[0][1][0];
192 mv_block->PMV[1][0][1] = s->mv[0][1][1];
194 if (s->mv_dir & MV_DIR_BACKWARD) {
195 mv_block->macroblock_type |= XVMC_MB_TYPE_MOTION_BACKWARD;
196 mv_block->PMV[0][1][0] = s->mv[1][0][0];
197 mv_block->PMV[0][1][1] = s->mv[1][0][1];
198 mv_block->PMV[1][1][0] = s->mv[1][1][0];
199 mv_block->PMV[1][1][1] = s->mv[1][1][1];
204 mv_block->motion_type = XVMC_PREDICTION_FRAME;
207 mv_block->motion_type = XVMC_PREDICTION_16x8;
210 mv_block->motion_type = XVMC_PREDICTION_FIELD;
211 if (s->picture_structure == PICT_FRAME) {
212 mv_block->PMV[0][0][1] <<= 1;
213 mv_block->PMV[1][0][1] <<= 1;
214 mv_block->PMV[0][1][1] <<= 1;
215 mv_block->PMV[1][1][1] <<= 1;
219 mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
220 if (s->picture_structure == PICT_FRAME) {
222 mv_block->PMV[0][0][0] = s->mv[0][0][0]; // top from top
223 mv_block->PMV[0][0][1] = s->mv[0][0][1] << 1;
225 mv_block->PMV[0][1][0] = s->mv[0][0][0]; // bottom from bottom
226 mv_block->PMV[0][1][1] = s->mv[0][0][1] << 1;
228 mv_block->PMV[1][0][0] = s->mv[0][2][0]; // dmv00, top from bottom
229 mv_block->PMV[1][0][1] = s->mv[0][2][1] << 1; // dmv01
231 mv_block->PMV[1][1][0] = s->mv[0][3][0]; // dmv10, bottom from top
232 mv_block->PMV[1][1][1] = s->mv[0][3][1] << 1; // dmv11
235 mv_block->PMV[0][1][0] = s->mv[0][2][0]; // dmv00
236 mv_block->PMV[0][1][1] = s->mv[0][2][1]; // dmv01
243 mv_block->motion_vertical_field_select = 0;
245 // set correct field references
246 if (s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8) {
247 mv_block->motion_vertical_field_select |= s->field_select[0][0];
248 mv_block->motion_vertical_field_select |= s->field_select[1][0] << 1;
249 mv_block->motion_vertical_field_select |= s->field_select[0][1] << 2;
250 mv_block->motion_vertical_field_select |= s->field_select[1][1] << 3;
253 // time to handle data blocks
254 mv_block->index = render->next_free_data_block_num;
257 if (s->chroma_format >= 2) {
258 blocks_per_mb = 4 + (1 << s->chroma_format);
263 for (i = 0; i < blocks_per_mb; i++) {
265 if (s->block_last_index[i] >= 0)
269 if (s->flags & CODEC_FLAG_GRAY) {
270 if (s->mb_intra) { // intra frames are always full chroma blocks
271 for (i = 4; i < blocks_per_mb; i++) {
272 memset(s->pblocks[i], 0, sizeof(short)*64); // so we need to clear them
273 if (!render->unsigned_intra)
274 s->pblocks[i][0] = 1 << 10;
277 cbp &= 0xf << (blocks_per_mb - 4);
278 blocks_per_mb = 4; // luminance blocks only
281 mv_block->coded_block_pattern = cbp;
283 mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN;
285 for (i = 0; i < blocks_per_mb; i++) {
286 if (s->block_last_index[i] >= 0) {
287 // I do not have unsigned_intra MOCO to test, hope it is OK.
288 if (s->mb_intra && (render->idct || (!render->idct && !render->unsigned_intra)))
289 s->pblocks[i][0] -= 1 << 10;
291 s->dsp.idct(s->pblocks[i]);
292 /* It is unclear if MC hardware requires pixel diff values to be
293 * in the range [-255;255]. TODO: Clipping if such hardware is
294 * ever found. As of now it would only be an unnecessary
297 // copy blocks only if the codec doesn't support pblocks reordering
298 if (s->avctx->xvmc_acceleration == 1) {
299 memcpy(&render->data_blocks[render->next_free_data_block_num*64],
300 s->pblocks[i], sizeof(short)*64);
302 render->next_free_data_block_num++;
305 render->filled_mv_blocks_num++;
307 assert(render->filled_mv_blocks_num <= render->total_number_of_mv_blocks);
308 assert(render->next_free_data_block_num <= render->total_number_of_data_blocks);
309 /* The above conditions should not be able to fail as long as this function
310 * is used and the following 'if ()' automatically calls a callback to free
314 if (render->filled_mv_blocks_num == render->total_number_of_mv_blocks)
315 ff_draw_horiz_band(s, 0, 0);