unscaled BGR24 -> YV12
[libav.git] / libavcodec / mpegvideo.c
CommitLineData
de6d9b64
FB
1/*
2 * The simplest mpeg encoder (well, it was the simplest!)
3 * Copyright (c) 2000,2001 Gerard Lantau.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19#include <stdlib.h>
20#include <stdio.h>
21#include <math.h>
22#include <string.h>
23#include "avcodec.h"
24#include "dsputil.h"
25#include "mpegvideo.h"
26
54329dd5
NK
27#ifdef USE_FASTMEMCPY
28#include "fastmemcpy.h"
29#endif
30
21af69f7
FB
31static void encode_picture(MpegEncContext *s, int picture_number);
32static void rate_control_init(MpegEncContext *s);
33static int rate_estimate_qscale(MpegEncContext *s);
34static void dct_unquantize_mpeg1_c(MpegEncContext *s,
35 DCTELEM *block, int n, int qscale);
36static void dct_unquantize_h263_c(MpegEncContext *s,
37 DCTELEM *block, int n, int qscale);
3d9fccbf 38static void draw_edges_c(UINT8 *buf, int wrap, int width, int height, int w);
2f349de2 39static int dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale);
3d9fccbf 40
2f349de2 41int (*dct_quantize)(MpegEncContext *s, DCTELEM *block, int n, int qscale)= dct_quantize_c;
3d9fccbf
MN
42void (*draw_edges)(UINT8 *buf, int wrap, int width, int height, int w)= draw_edges_c;
43
de6d9b64
FB
44#define EDGE_WIDTH 16
45
46/* enable all paranoid tests for rounding, overflows, etc... */
47//#define PARANOID
48
49//#define DEBUG
50
51/* for jpeg fast DCT */
52#define CONST_BITS 14
53
54static const unsigned short aanscales[64] = {
55 /* precomputed values scaled up by 14 bits */
56 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
57 22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270,
58 21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906,
59 19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315,
60 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
61 12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552,
62 8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446,
63 4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247
64};
65
66static UINT8 h263_chroma_roundtab[16] = {
67 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,
68};
69
de6d9b64
FB
70/* default motion estimation */
71int motion_estimation_method = ME_LOG;
72
badaf88e
MN
73extern UINT8 zigzag_end[64];
74
2f349de2 75static void convert_matrix(int *qmat, UINT16 *qmat16, const UINT16 *quant_matrix, int qscale)
de6d9b64
FB
76{
77 int i;
78
79 if (av_fdct == jpeg_fdct_ifast) {
80 for(i=0;i<64;i++) {
81 /* 16 <= qscale * quant_matrix[i] <= 7905 */
2f349de2
MN
82 /* 19952 <= aanscales[i] * qscale * quant_matrix[i] <= 249205026 */
83 /* (1<<36)/19952 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= (1<<36)/249205026 */
84 /* 3444240 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= 275 */
de6d9b64 85
2f349de2
MN
86 qmat[block_permute_op(i)] = (int)((UINT64_C(1) << (QMAT_SHIFT + 11)) /
87 (aanscales[i] * qscale * quant_matrix[block_permute_op(i)]));
de6d9b64
FB
88 }
89 } else {
90 for(i=0;i<64;i++) {
91 /* We can safely suppose that 16 <= quant_matrix[i] <= 255
2f349de2
MN
92 So 16 <= qscale * quant_matrix[i] <= 7905
93 so (1<<19) / 16 >= (1<<19) / (qscale * quant_matrix[i]) >= (1<<19) / 7905
94 so 32768 >= (1<<19) / (qscale * quant_matrix[i]) >= 67
de6d9b64 95 */
2f349de2
MN
96 qmat[i] = (1 << QMAT_SHIFT_MMX) / (qscale * quant_matrix[i]);
97 qmat16[i] = (1 << QMAT_SHIFT_MMX) / (qscale * quant_matrix[block_permute_op(i)]);
de6d9b64
FB
98 }
99 }
100}
101
102/* init common structure for both encoder and decoder */
103int MPV_common_init(MpegEncContext *s)
104{
105 int c_size, i;
106 UINT8 *pict;
107
21af69f7
FB
108 if (s->out_format == FMT_H263)
109 s->dct_unquantize = dct_unquantize_h263_c;
110 else
111 s->dct_unquantize = dct_unquantize_mpeg1_c;
112
113#ifdef HAVE_MMX
114 MPV_common_init_mmx(s);
a9b3f630 115#endif
de6d9b64
FB
116 s->mb_width = (s->width + 15) / 16;
117 s->mb_height = (s->height + 15) / 16;
118 s->linesize = s->mb_width * 16 + 2 * EDGE_WIDTH;
119
120 for(i=0;i<3;i++) {
121 int w, h, shift, pict_start;
122
123 w = s->linesize;
124 h = s->mb_height * 16 + 2 * EDGE_WIDTH;
125 shift = (i == 0) ? 0 : 1;
126 c_size = (w >> shift) * (h >> shift);
127 pict_start = (w >> shift) * (EDGE_WIDTH >> shift) + (EDGE_WIDTH >> shift);
128
129 pict = av_mallocz(c_size);
130 if (pict == NULL)
131 goto fail;
132 s->last_picture_base[i] = pict;
133 s->last_picture[i] = pict + pict_start;
134
135 pict = av_mallocz(c_size);
136 if (pict == NULL)
137 goto fail;
138 s->next_picture_base[i] = pict;
139 s->next_picture[i] = pict + pict_start;
140
141 if (s->has_b_frames) {
142 pict = av_mallocz(c_size);
143 if (pict == NULL)
144 goto fail;
145 s->aux_picture_base[i] = pict;
146 s->aux_picture[i] = pict + pict_start;
147 }
148 }
149
150 if (s->out_format == FMT_H263) {
151 int size;
152 /* MV prediction */
153 size = (2 * s->mb_width + 2) * (2 * s->mb_height + 2);
154 s->motion_val = malloc(size * 2 * sizeof(INT16));
155 if (s->motion_val == NULL)
156 goto fail;
157 memset(s->motion_val, 0, size * 2 * sizeof(INT16));
158 }
159
160 if (s->h263_pred) {
161 int y_size, c_size, i, size;
162
163 /* dc values */
164
165 y_size = (2 * s->mb_width + 2) * (2 * s->mb_height + 2);
166 c_size = (s->mb_width + 2) * (s->mb_height + 2);
167 size = y_size + 2 * c_size;
168 s->dc_val[0] = malloc(size * sizeof(INT16));
169 if (s->dc_val[0] == NULL)
170 goto fail;
171 s->dc_val[1] = s->dc_val[0] + y_size;
172 s->dc_val[2] = s->dc_val[1] + c_size;
173 for(i=0;i<size;i++)
174 s->dc_val[0][i] = 1024;
175
176 /* ac values */
177 s->ac_val[0] = av_mallocz(size * sizeof(INT16) * 16);
178 if (s->ac_val[0] == NULL)
179 goto fail;
180 s->ac_val[1] = s->ac_val[0] + y_size;
181 s->ac_val[2] = s->ac_val[1] + c_size;
182
183 /* cbp values */
184 s->coded_block = av_mallocz(y_size);
185 if (!s->coded_block)
186 goto fail;
bff6ecaa
MN
187
188 /* which mb is a intra block */
01dbbd0a 189 s->mbintra_table = av_mallocz(s->mb_width * s->mb_height);
bff6ecaa
MN
190 if (!s->mbintra_table)
191 goto fail;
01dbbd0a 192 memset(s->mbintra_table, 1, s->mb_width * s->mb_height);
5b3438c6 193 }
de6d9b64
FB
194 /* default structure is frame */
195 s->picture_structure = PICT_FRAME;
196
3bb4e23a
FB
197 /* init macroblock skip table */
198 if (!s->encoding) {
199 s->mbskip_table = av_mallocz(s->mb_width * s->mb_height);
200 if (!s->mbskip_table)
201 goto fail;
202 }
203
de6d9b64
FB
204 s->context_initialized = 1;
205 return 0;
206 fail:
207 if (s->motion_val)
208 free(s->motion_val);
209 if (s->dc_val[0])
210 free(s->dc_val[0]);
211 if (s->ac_val[0])
212 free(s->ac_val[0]);
213 if (s->coded_block)
214 free(s->coded_block);
bff6ecaa 215 if (s->mbintra_table)
5b3438c6 216 free(s->mbintra_table);
3bb4e23a
FB
217 if (s->mbskip_table)
218 free(s->mbskip_table);
de6d9b64
FB
219 for(i=0;i<3;i++) {
220 if (s->last_picture_base[i])
221 free(s->last_picture_base[i]);
222 if (s->next_picture_base[i])
223 free(s->next_picture_base[i]);
224 if (s->aux_picture_base[i])
225 free(s->aux_picture_base[i]);
226 }
227 return -1;
228}
229
230/* init common structure for both encoder and decoder */
231void MPV_common_end(MpegEncContext *s)
232{
233 int i;
234
235 if (s->motion_val)
236 free(s->motion_val);
237 if (s->h263_pred) {
238 free(s->dc_val[0]);
239 free(s->ac_val[0]);
240 free(s->coded_block);
5b3438c6 241 free(s->mbintra_table);
de6d9b64 242 }
3bb4e23a
FB
243 if (s->mbskip_table)
244 free(s->mbskip_table);
de6d9b64
FB
245 for(i=0;i<3;i++) {
246 free(s->last_picture_base[i]);
247 free(s->next_picture_base[i]);
248 if (s->has_b_frames)
249 free(s->aux_picture_base[i]);
250 }
251 s->context_initialized = 0;
252}
253
254/* init video encoder */
255int MPV_encode_init(AVCodecContext *avctx)
256{
257 MpegEncContext *s = avctx->priv_data;
519c2b6d 258 int i;
de6d9b64
FB
259
260 s->bit_rate = avctx->bit_rate;
261 s->frame_rate = avctx->frame_rate;
262 s->width = avctx->width;
263 s->height = avctx->height;
264 s->gop_size = avctx->gop_size;
644d98a4
J
265 s->rtp_mode = avctx->rtp_mode;
266 s->rtp_payload_size = avctx->rtp_payload_size;
81401c1f
J
267 if (avctx->rtp_callback)
268 s->rtp_callback = avctx->rtp_callback;
477c35a9 269 s->avctx = avctx;
644d98a4 270
de6d9b64
FB
271 if (s->gop_size <= 1) {
272 s->intra_only = 1;
273 s->gop_size = 12;
274 } else {
275 s->intra_only = 0;
276 }
277 s->full_search = motion_estimation_method;
278
279 s->fixed_qscale = (avctx->flags & CODEC_FLAG_QSCALE);
280
281 switch(avctx->codec->id) {
282 case CODEC_ID_MPEG1VIDEO:
283 s->out_format = FMT_MPEG1;
284 break;
285 case CODEC_ID_MJPEG:
286 s->out_format = FMT_MJPEG;
287 s->intra_only = 1; /* force intra only for jpeg */
80e103d0
A
288 s->mjpeg_write_tables = 1; /* write all tables */
289 s->mjpeg_vsample[0] = 2; /* set up default sampling factors */
290 s->mjpeg_vsample[1] = 1; /* the only currently supported values */
291 s->mjpeg_vsample[2] = 1;
292 s->mjpeg_hsample[0] = 2;
293 s->mjpeg_hsample[1] = 1;
294 s->mjpeg_hsample[2] = 1;
de6d9b64
FB
295 if (mjpeg_init(s) < 0)
296 return -1;
297 break;
298 case CODEC_ID_H263:
3a842ea5
A
299 if (h263_get_picture_format(s->width, s->height) == 7){
300 printf("Input picture size isn't suitable for h263 codec! try h263+\n");
de6d9b64 301 return -1;
3a842ea5 302 }
de6d9b64
FB
303 s->out_format = FMT_H263;
304 break;
305 case CODEC_ID_H263P:
306 s->out_format = FMT_H263;
644d98a4
J
307 s->rtp_mode = 1;
308 s->rtp_payload_size = 1200;
de6d9b64 309 s->h263_plus = 1;
6dbd39fe 310 s->unrestricted_mv = 1;
544286b3
J
311
312 /* These are just to be sure */
313 s->umvplus = 0;
314 s->umvplus_dec = 0;
de6d9b64
FB
315 break;
316 case CODEC_ID_RV10:
317 s->out_format = FMT_H263;
318 s->h263_rv10 = 1;
319 break;
58f26ba9 320 case CODEC_ID_MPEG4:
de6d9b64
FB
321 s->out_format = FMT_H263;
322 s->h263_pred = 1;
323 s->unrestricted_mv = 1;
324 break;
325 case CODEC_ID_MSMPEG4:
326 s->out_format = FMT_H263;
327 s->h263_msmpeg4 = 1;
328 s->h263_pred = 1;
329 s->unrestricted_mv = 1;
330 break;
331 default:
332 return -1;
333 }
334
335 if (s->out_format == FMT_H263)
336 h263_encode_init_vlc(s);
337
3bb4e23a
FB
338 s->encoding = 1;
339
de6d9b64
FB
340 /* init */
341 if (MPV_common_init(s) < 0)
342 return -1;
343
519c2b6d
FB
344 /* init default q matrix */
345 for(i=0;i<64;i++) {
346 s->intra_matrix[i] = default_intra_matrix[i];
347 s->non_intra_matrix[i] = default_non_intra_matrix[i];
348 }
349
de6d9b64
FB
350 /* rate control init */
351 rate_control_init(s);
352
353 s->picture_number = 0;
354 s->fake_picture_number = 0;
355 /* motion detector init */
356 s->f_code = 1;
357
358 return 0;
359}
360
361int MPV_encode_end(AVCodecContext *avctx)
362{
363 MpegEncContext *s = avctx->priv_data;
364
365#ifdef STATS
366 print_stats();
367#endif
368 MPV_common_end(s);
369 if (s->out_format == FMT_MJPEG)
370 mjpeg_close(s);
371 return 0;
372}
373
374/* draw the edges of width 'w' of an image of size width, height */
3d9fccbf 375static void draw_edges_c(UINT8 *buf, int wrap, int width, int height, int w)
de6d9b64
FB
376{
377 UINT8 *ptr, *last_line;
378 int i;
379
380 last_line = buf + (height - 1) * wrap;
381 for(i=0;i<w;i++) {
382 /* top and bottom */
383 memcpy(buf - (i + 1) * wrap, buf, width);
384 memcpy(last_line + (i + 1) * wrap, last_line, width);
385 }
386 /* left and right */
387 ptr = buf;
388 for(i=0;i<height;i++) {
389 memset(ptr - w, ptr[0], w);
390 memset(ptr + width, ptr[width-1], w);
391 ptr += wrap;
392 }
393 /* corners */
394 for(i=0;i<w;i++) {
395 memset(buf - (i + 1) * wrap - w, buf[0], w); /* top left */
396 memset(buf - (i + 1) * wrap + width, buf[width-1], w); /* top right */
397 memset(last_line + (i + 1) * wrap - w, last_line[0], w); /* top left */
398 memset(last_line + (i + 1) * wrap + width, last_line[width-1], w); /* top right */
399 }
400}
401
de6d9b64
FB
402/* generic function for encode/decode called before a frame is coded/decoded */
403void MPV_frame_start(MpegEncContext *s)
404{
405 int i;
406 UINT8 *tmp;
407
425dddb7 408 s->mb_skiped = 0;
de6d9b64
FB
409 if (s->pict_type == B_TYPE) {
410 for(i=0;i<3;i++) {
411 s->current_picture[i] = s->aux_picture[i];
412 }
413 } else {
414 for(i=0;i<3;i++) {
415 /* swap next and last */
416 tmp = s->last_picture[i];
417 s->last_picture[i] = s->next_picture[i];
418 s->next_picture[i] = tmp;
419 s->current_picture[i] = tmp;
420 }
421 }
422}
21af69f7 423
de6d9b64
FB
424/* generic function for encode/decode called after a frame has been coded/decoded */
425void MPV_frame_end(MpegEncContext *s)
426{
427 /* draw edge for correct motion prediction if outside */
2f349de2 428 if (s->pict_type != B_TYPE && !s->intra_only) {
eede2156 429 if(s->avctx==NULL || s->avctx->codec->id!=CODEC_ID_MPEG4){
393fe8dd
A
430 draw_edges(s->current_picture[0], s->linesize, s->mb_width*16, s->mb_height*16, EDGE_WIDTH);
431 draw_edges(s->current_picture[1], s->linesize/2, s->mb_width*8, s->mb_height*8, EDGE_WIDTH/2);
432 draw_edges(s->current_picture[2], s->linesize/2, s->mb_width*8, s->mb_height*8, EDGE_WIDTH/2);
ef093645
MN
433 }else{
434 /* OpenDivx, but i dunno how to distinguish it from mpeg4 */
de6d9b64
FB
435 draw_edges(s->current_picture[0], s->linesize, s->width, s->height, EDGE_WIDTH);
436 draw_edges(s->current_picture[1], s->linesize/2, s->width/2, s->height/2, EDGE_WIDTH/2);
437 draw_edges(s->current_picture[2], s->linesize/2, s->width/2, s->height/2, EDGE_WIDTH/2);
ef093645 438 }
de6d9b64 439 }
5975626d 440 emms_c();
de6d9b64
FB
441}
442
443int MPV_encode_picture(AVCodecContext *avctx,
444 unsigned char *buf, int buf_size, void *data)
445{
446 MpegEncContext *s = avctx->priv_data;
447 AVPicture *pict = data;
448 int i, j;
449
450 if (s->fixed_qscale)
451 s->qscale = avctx->quality;
452
453 init_put_bits(&s->pb, buf, buf_size, NULL, NULL);
454
455 if (!s->intra_only) {
456 /* first picture of GOP is intra */
457 if ((s->picture_number % s->gop_size) == 0)
458 s->pict_type = I_TYPE;
459 else
460 s->pict_type = P_TYPE;
461 } else {
462 s->pict_type = I_TYPE;
463 }
464 avctx->key_frame = (s->pict_type == I_TYPE);
465
466 MPV_frame_start(s);
2f349de2 467
de6d9b64
FB
468 for(i=0;i<3;i++) {
469 UINT8 *src = pict->data[i];
470 UINT8 *dest = s->current_picture[i];
471 int src_wrap = pict->linesize[i];
472 int dest_wrap = s->linesize;
473 int w = s->width;
474 int h = s->height;
475
476 if (i >= 1) {
477 dest_wrap >>= 1;
478 w >>= 1;
479 h >>= 1;
480 }
481
0b2540a0
MN
482 if(dest_wrap==src_wrap){
483 s->new_picture[i] = pict->data[i];
2f349de2
MN
484 }else {
485 for(j=0;j<h;j++) {
486 memcpy(dest, src, w);
487 dest += dest_wrap;
488 src += src_wrap;
489 }
0b2540a0 490 s->new_picture[i] = s->current_picture[i];
2f349de2 491 }
de6d9b64
FB
492 }
493
494 encode_picture(s, s->picture_number);
495
496 MPV_frame_end(s);
497 s->picture_number++;
498
499 if (s->out_format == FMT_MJPEG)
500 mjpeg_picture_trailer(s);
501
502 flush_put_bits(&s->pb);
503 s->total_bits += (s->pb.buf_ptr - s->pb.buf) * 8;
504 avctx->quality = s->qscale;
505 return s->pb.buf_ptr - s->pb.buf;
506}
507
508static inline int clip(int a, int amin, int amax)
509{
510 if (a < amin)
511 return amin;
512 else if (a > amax)
513 return amax;
514 else
515 return a;
516}
517
de6d9b64
FB
518/* apply one mpeg motion vector to the three components */
519static inline void mpeg_motion(MpegEncContext *s,
520 UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr,
521 int dest_offset,
522 UINT8 **ref_picture, int src_offset,
523 int field_based, op_pixels_func *pix_op,
524 int motion_x, int motion_y, int h)
525{
526 UINT8 *ptr;
527 int dxy, offset, mx, my, src_x, src_y, height, linesize;
528
529 dxy = ((motion_y & 1) << 1) | (motion_x & 1);
530 src_x = s->mb_x * 16 + (motion_x >> 1);
531 src_y = s->mb_y * (16 >> field_based) + (motion_y >> 1);
532
533 /* WARNING: do no forget half pels */
534 height = s->height >> field_based;
535 src_x = clip(src_x, -16, s->width);
536 if (src_x == s->width)
537 dxy &= ~1;
538 src_y = clip(src_y, -16, height);
539 if (src_y == height)
540 dxy &= ~2;
541 linesize = s->linesize << field_based;
542 ptr = ref_picture[0] + (src_y * linesize) + (src_x) + src_offset;
543 dest_y += dest_offset;
544 pix_op[dxy](dest_y, ptr, linesize, h);
545 pix_op[dxy](dest_y + 8, ptr + 8, linesize, h);
546
547 if (s->out_format == FMT_H263) {
548 dxy = 0;
549 if ((motion_x & 3) != 0)
550 dxy |= 1;
551 if ((motion_y & 3) != 0)
552 dxy |= 2;
553 mx = motion_x >> 2;
554 my = motion_y >> 2;
555 } else {
556 mx = motion_x / 2;
557 my = motion_y / 2;
558 dxy = ((my & 1) << 1) | (mx & 1);
559 mx >>= 1;
560 my >>= 1;
561 }
562
563 src_x = s->mb_x * 8 + mx;
564 src_y = s->mb_y * (8 >> field_based) + my;
565 src_x = clip(src_x, -8, s->width >> 1);
566 if (src_x == (s->width >> 1))
567 dxy &= ~1;
568 src_y = clip(src_y, -8, height >> 1);
569 if (src_y == (height >> 1))
570 dxy &= ~2;
571
572 offset = (src_y * (linesize >> 1)) + src_x + (src_offset >> 1);
573 ptr = ref_picture[1] + offset;
574 pix_op[dxy](dest_cb + (dest_offset >> 1), ptr, linesize >> 1, h >> 1);
575 ptr = ref_picture[2] + offset;
576 pix_op[dxy](dest_cr + (dest_offset >> 1), ptr, linesize >> 1, h >> 1);
577}
578
579static inline void MPV_motion(MpegEncContext *s,
580 UINT8 *dest_y, UINT8 *dest_cb, UINT8 *dest_cr,
581 int dir, UINT8 **ref_picture,
582 op_pixels_func *pix_op)
583{
584 int dxy, offset, mx, my, src_x, src_y, motion_x, motion_y;
585 int mb_x, mb_y, i;
586 UINT8 *ptr, *dest;
587
588 mb_x = s->mb_x;
589 mb_y = s->mb_y;
590
591 switch(s->mv_type) {
592 case MV_TYPE_16X16:
593 mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
594 ref_picture, 0,
595 0, pix_op,
596 s->mv[dir][0][0], s->mv[dir][0][1], 16);
597 break;
598 case MV_TYPE_8X8:
599 for(i=0;i<4;i++) {
600 motion_x = s->mv[dir][i][0];
601 motion_y = s->mv[dir][i][1];
602
603 dxy = ((motion_y & 1) << 1) | (motion_x & 1);
604 src_x = mb_x * 16 + (motion_x >> 1) + (i & 1) * 8;
605 src_y = mb_y * 16 + (motion_y >> 1) + ((i >> 1) & 1) * 8;
606
607 /* WARNING: do no forget half pels */
608 src_x = clip(src_x, -16, s->width);
609 if (src_x == s->width)
610 dxy &= ~1;
611 src_y = clip(src_y, -16, s->height);
612 if (src_y == s->height)
613 dxy &= ~2;
614
615 ptr = ref_picture[0] + (src_y * s->linesize) + (src_x);
616 dest = dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize;
617 pix_op[dxy](dest, ptr, s->linesize, 8);
618 }
619 /* In case of 8X8, we construct a single chroma motion vector
620 with a special rounding */
621 mx = 0;
622 my = 0;
623 for(i=0;i<4;i++) {
624 mx += s->mv[dir][i][0];
625 my += s->mv[dir][i][1];
626 }
627 if (mx >= 0)
628 mx = (h263_chroma_roundtab[mx & 0xf] + ((mx >> 3) & ~1));
629 else {
630 mx = -mx;
631 mx = -(h263_chroma_roundtab[mx & 0xf] + ((mx >> 3) & ~1));
632 }
633 if (my >= 0)
634 my = (h263_chroma_roundtab[my & 0xf] + ((my >> 3) & ~1));
635 else {
636 my = -my;
637 my = -(h263_chroma_roundtab[my & 0xf] + ((my >> 3) & ~1));
638 }
639 dxy = ((my & 1) << 1) | (mx & 1);
640 mx >>= 1;
641 my >>= 1;
642
643 src_x = mb_x * 8 + mx;
644 src_y = mb_y * 8 + my;
645 src_x = clip(src_x, -8, s->width/2);
646 if (src_x == s->width/2)
647 dxy &= ~1;
648 src_y = clip(src_y, -8, s->height/2);
649 if (src_y == s->height/2)
650 dxy &= ~2;
651
652 offset = (src_y * (s->linesize >> 1)) + src_x;
653 ptr = ref_picture[1] + offset;
654 pix_op[dxy](dest_cb, ptr, s->linesize >> 1, 8);
655 ptr = ref_picture[2] + offset;
656 pix_op[dxy](dest_cr, ptr, s->linesize >> 1, 8);
657 break;
658 case MV_TYPE_FIELD:
659 if (s->picture_structure == PICT_FRAME) {
660 /* top field */
661 mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
662 ref_picture, s->field_select[dir][0] ? s->linesize : 0,
663 1, pix_op,
664 s->mv[dir][0][0], s->mv[dir][0][1], 8);
665 /* bottom field */
666 mpeg_motion(s, dest_y, dest_cb, dest_cr, s->linesize,
667 ref_picture, s->field_select[dir][1] ? s->linesize : 0,
668 1, pix_op,
669 s->mv[dir][1][0], s->mv[dir][1][1], 8);
670 } else {
671
672
673 }
674 break;
675 }
676}
677
678
679/* put block[] to dest[] */
680static inline void put_dct(MpegEncContext *s,
681 DCTELEM *block, int i, UINT8 *dest, int line_size)
682{
683 if (!s->mpeg2)
21af69f7 684 s->dct_unquantize(s, block, i, s->qscale);
4af7bcc1 685 ff_idct (block);
de6d9b64
FB
686 put_pixels_clamped(block, dest, line_size);
687}
688
689/* add block[] to dest[] */
690static inline void add_dct(MpegEncContext *s,
691 DCTELEM *block, int i, UINT8 *dest, int line_size)
692{
693 if (s->block_last_index[i] >= 0) {
694 if (!s->mpeg2)
3d9fccbf 695 if(s->encoding || (!s->h263_msmpeg4))
badaf88e 696 s->dct_unquantize(s, block, i, s->qscale);
4af7bcc1 697 ff_idct (block);
de6d9b64
FB
698 add_pixels_clamped(block, dest, line_size);
699 }
700}
701
702/* generic function called after a macroblock has been parsed by the
703 decoder or after it has been encoded by the encoder.
704
705 Important variables used:
706 s->mb_intra : true if intra macroblock
707 s->mv_dir : motion vector direction
708 s->mv_type : motion vector type
709 s->mv : motion vector
710 s->interlaced_dct : true if interlaced dct used (mpeg2)
711 */
712void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
713{
714 int mb_x, mb_y, motion_x, motion_y;
715 int dct_linesize, dct_offset;
716 op_pixels_func *op_pix;
717
718 mb_x = s->mb_x;
719 mb_y = s->mb_y;
720
79e7b305
A
721#ifdef FF_POSTPROCESS
722 quant_store[mb_y][mb_x]=s->qscale;
723 //printf("[%02d][%02d] %d\n",mb_x,mb_y,s->qscale);
724#endif
725
de6d9b64
FB
726 /* update DC predictors for P macroblocks */
727 if (!s->mb_intra) {
728 if (s->h263_pred) {
bff6ecaa
MN
729 if(s->mbintra_table[mb_x + mb_y*s->mb_width])
730 {
de6d9b64 731 int wrap, x, y, v;
bff6ecaa
MN
732 s->mbintra_table[mb_x + mb_y*s->mb_width]=0;
733
de6d9b64
FB
734 wrap = 2 * s->mb_width + 2;
735 v = 1024;
736 x = 2 * mb_x + 1;
737 y = 2 * mb_y + 1;
bff6ecaa 738
de6d9b64
FB
739 s->dc_val[0][(x) + (y) * wrap] = v;
740 s->dc_val[0][(x + 1) + (y) * wrap] = v;
741 s->dc_val[0][(x) + (y + 1) * wrap] = v;
742 s->dc_val[0][(x + 1) + (y + 1) * wrap] = v;
743 /* ac pred */
744 memset(s->ac_val[0][(x) + (y) * wrap], 0, 16 * sizeof(INT16));
745 memset(s->ac_val[0][(x + 1) + (y) * wrap], 0, 16 * sizeof(INT16));
746 memset(s->ac_val[0][(x) + (y + 1) * wrap], 0, 16 * sizeof(INT16));
747 memset(s->ac_val[0][(x + 1) + (y + 1) * wrap], 0, 16 * sizeof(INT16));
748 if (s->h263_msmpeg4) {
749 s->coded_block[(x) + (y) * wrap] = 0;
750 s->coded_block[(x + 1) + (y) * wrap] = 0;
751 s->coded_block[(x) + (y + 1) * wrap] = 0;
752 s->coded_block[(x + 1) + (y + 1) * wrap] = 0;
753 }
754 /* chroma */
755 wrap = s->mb_width + 2;
756 x = mb_x + 1;
757 y = mb_y + 1;
758 s->dc_val[1][(x) + (y) * wrap] = v;
759 s->dc_val[2][(x) + (y) * wrap] = v;
760 /* ac pred */
761 memset(s->ac_val[1][(x) + (y) * wrap], 0, 16 * sizeof(INT16));
762 memset(s->ac_val[2][(x) + (y) * wrap], 0, 16 * sizeof(INT16));
bff6ecaa 763 }
de6d9b64
FB
764 } else {
765 s->last_dc[0] = 128 << s->intra_dc_precision;
766 s->last_dc[1] = 128 << s->intra_dc_precision;
767 s->last_dc[2] = 128 << s->intra_dc_precision;
768 }
769 }
5b3438c6 770 else if (s->h263_pred)
bff6ecaa
MN
771 s->mbintra_table[mb_x + mb_y*s->mb_width]=1;
772
de6d9b64
FB
773 /* update motion predictor */
774 if (s->out_format == FMT_H263) {
775 int x, y, wrap;
776
777 x = 2 * mb_x + 1;
778 y = 2 * mb_y + 1;
779 wrap = 2 * s->mb_width + 2;
780 if (s->mb_intra) {
781 motion_x = 0;
782 motion_y = 0;
783 goto motion_init;
784 } else if (s->mv_type == MV_TYPE_16X16) {
785 motion_x = s->mv[0][0][0];
786 motion_y = s->mv[0][0][1];
787 motion_init:
788 /* no update if 8X8 because it has been done during parsing */
789 s->motion_val[(x) + (y) * wrap][0] = motion_x;
790 s->motion_val[(x) + (y) * wrap][1] = motion_y;
791 s->motion_val[(x + 1) + (y) * wrap][0] = motion_x;
792 s->motion_val[(x + 1) + (y) * wrap][1] = motion_y;
793 s->motion_val[(x) + (y + 1) * wrap][0] = motion_x;
794 s->motion_val[(x) + (y + 1) * wrap][1] = motion_y;
795 s->motion_val[(x + 1) + (y + 1) * wrap][0] = motion_x;
796 s->motion_val[(x + 1) + (y + 1) * wrap][1] = motion_y;
797 }
798 }
799
800 if (!s->intra_only) {
801 UINT8 *dest_y, *dest_cb, *dest_cr;
3bb4e23a
FB
802 UINT8 *mbskip_ptr;
803
804 /* avoid copy if macroblock skipped in last frame too */
21af69f7 805 if (!s->encoding && s->pict_type != B_TYPE) {
3bb4e23a
FB
806 mbskip_ptr = &s->mbskip_table[s->mb_y * s->mb_width + s->mb_x];
807 if (s->mb_skiped) {
808 s->mb_skiped = 0;
809 /* if previous was skipped too, then nothing to do ! */
810 if (*mbskip_ptr != 0)
811 goto the_end;
812 *mbskip_ptr = 1; /* indicate that this time we skiped it */
813 } else {
814 *mbskip_ptr = 0; /* not skipped */
815 }
816 }
de6d9b64
FB
817
818 dest_y = s->current_picture[0] + (mb_y * 16 * s->linesize) + mb_x * 16;
819 dest_cb = s->current_picture[1] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8;
820 dest_cr = s->current_picture[2] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8;
821
822 if (s->interlaced_dct) {
823 dct_linesize = s->linesize * 2;
824 dct_offset = s->linesize;
825 } else {
826 dct_linesize = s->linesize;
827 dct_offset = s->linesize * 8;
828 }
829
830 if (!s->mb_intra) {
831 /* motion handling */
832 if (!s->no_rounding)
833 op_pix = put_pixels_tab;
834 else
835 op_pix = put_no_rnd_pixels_tab;
836
837 if (s->mv_dir & MV_DIR_FORWARD) {
838 MPV_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_picture, op_pix);
839 if (!s->no_rounding)
840 op_pix = avg_pixels_tab;
841 else
842 op_pix = avg_no_rnd_pixels_tab;
843 }
844 if (s->mv_dir & MV_DIR_BACKWARD) {
845 MPV_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_picture, op_pix);
846 }
847
848 /* add dct residue */
849 add_dct(s, block[0], 0, dest_y, dct_linesize);
850 add_dct(s, block[1], 1, dest_y + 8, dct_linesize);
851 add_dct(s, block[2], 2, dest_y + dct_offset, dct_linesize);
852 add_dct(s, block[3], 3, dest_y + dct_offset + 8, dct_linesize);
853
51454751
FB
854 add_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
855 add_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
de6d9b64
FB
856 } else {
857 /* dct only in intra block */
858 put_dct(s, block[0], 0, dest_y, dct_linesize);
859 put_dct(s, block[1], 1, dest_y + 8, dct_linesize);
860 put_dct(s, block[2], 2, dest_y + dct_offset, dct_linesize);
861 put_dct(s, block[3], 3, dest_y + dct_offset + 8, dct_linesize);
862
51454751
FB
863 put_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
864 put_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
de6d9b64
FB
865 }
866 }
3bb4e23a
FB
867 the_end:
868 emms_c();
de6d9b64
FB
869}
870
871static void encode_picture(MpegEncContext *s, int picture_number)
872{
81401c1f 873 int mb_x, mb_y, wrap, last_gob, pdif = 0;
de6d9b64 874 UINT8 *ptr;
de6d9b64
FB
875 int i, motion_x, motion_y;
876
877 s->picture_number = picture_number;
878 if (!s->fixed_qscale)
879 s->qscale = rate_estimate_qscale(s);
880
881 /* precompute matrix */
882 if (s->out_format == FMT_MJPEG) {
883 /* for mjpeg, we do include qscale in the matrix */
884 s->intra_matrix[0] = default_intra_matrix[0];
885 for(i=1;i<64;i++)
886 s->intra_matrix[i] = (default_intra_matrix[i] * s->qscale) >> 3;
2f349de2 887 convert_matrix(s->q_intra_matrix, s->q_intra_matrix16, s->intra_matrix, 8);
de6d9b64 888 } else {
2f349de2
MN
889 convert_matrix(s->q_intra_matrix, s->q_intra_matrix16, s->intra_matrix, s->qscale);
890 convert_matrix(s->q_non_intra_matrix, s->q_non_intra_matrix16, s->non_intra_matrix, s->qscale);
de6d9b64
FB
891 }
892
893 switch(s->out_format) {
894 case FMT_MJPEG:
895 mjpeg_picture_header(s);
896 break;
897 case FMT_H263:
898 if (s->h263_msmpeg4)
899 msmpeg4_encode_picture_header(s, picture_number);
900 else if (s->h263_pred)
901 mpeg4_encode_picture_header(s, picture_number);
902 else if (s->h263_rv10)
903 rv10_encode_picture_header(s, picture_number);
904 else
905 h263_encode_picture_header(s, picture_number);
906 break;
907 case FMT_MPEG1:
908 mpeg1_encode_picture_header(s, picture_number);
909 break;
910 }
911
912 /* init last dc values */
913 /* note: quant matrix value (8) is implied here */
914 s->last_dc[0] = 128;
915 s->last_dc[1] = 128;
916 s->last_dc[2] = 128;
917 s->mb_incr = 1;
918 s->last_mv[0][0][0] = 0;
919 s->last_mv[0][0][1] = 0;
920 s->mv_type = MV_TYPE_16X16;
921 s->mv_dir = MV_DIR_FORWARD;
922
644d98a4 923 /* Get the GOB height based on picture height */
81401c1f 924 if (s->out_format == FMT_H263 && !s->h263_pred && !s->h263_msmpeg4) {
644d98a4
J
925 if (s->height <= 400)
926 s->gob_index = 1;
927 else if (s->height <= 800)
928 s->gob_index = 2;
929 else
930 s->gob_index = 4;
931 }
932
de6d9b64 933 for(mb_y=0; mb_y < s->mb_height; mb_y++) {
644d98a4 934 /* Put GOB header based on RTP MTU */
81401c1f
J
935 /* TODO: Put all this stuff in a separate generic function */
936 if (s->rtp_mode) {
937 if (!mb_y) {
938 s->ptr_lastgob = s->pb.buf;
939 s->ptr_last_mb_line = s->pb.buf;
940 } else if (s->out_format == FMT_H263 && !s->h263_pred && !s->h263_msmpeg4 && !(mb_y % s->gob_index)) {
941 last_gob = h263_encode_gob_header(s, mb_y);
942 if (last_gob) {
943 s->first_gob_line = 1;
944 }
945 }
644d98a4 946 }
de6d9b64
FB
947 for(mb_x=0; mb_x < s->mb_width; mb_x++) {
948
949 s->mb_x = mb_x;
950 s->mb_y = mb_y;
951
952 /* compute motion vector and macro block type (intra or non intra) */
953 motion_x = 0;
954 motion_y = 0;
955 if (s->pict_type == P_TYPE) {
956 s->mb_intra = estimate_motion(s, mb_x, mb_y,
957 &motion_x,
958 &motion_y);
959 } else {
960 s->mb_intra = 1;
961 }
962
963 /* get the pixels */
964 wrap = s->linesize;
965 ptr = s->new_picture[0] + (mb_y * 16 * wrap) + mb_x * 16;
21af69f7
FB
966 get_pixels(s->block[0], ptr, wrap);
967 get_pixels(s->block[1], ptr + 8, wrap);
968 get_pixels(s->block[2], ptr + 8 * wrap, wrap);
969 get_pixels(s->block[3], ptr + 8 * wrap + 8, wrap);
de6d9b64
FB
970 wrap = s->linesize >> 1;
971 ptr = s->new_picture[1] + (mb_y * 8 * wrap) + mb_x * 8;
21af69f7 972 get_pixels(s->block[4], ptr, wrap);
de6d9b64
FB
973
974 wrap = s->linesize >> 1;
975 ptr = s->new_picture[2] + (mb_y * 8 * wrap) + mb_x * 8;
21af69f7 976 get_pixels(s->block[5], ptr, wrap);
de6d9b64
FB
977
978 /* subtract previous frame if non intra */
979 if (!s->mb_intra) {
980 int dxy, offset, mx, my;
981
982 dxy = ((motion_y & 1) << 1) | (motion_x & 1);
983 ptr = s->last_picture[0] +
984 ((mb_y * 16 + (motion_y >> 1)) * s->linesize) +
985 (mb_x * 16 + (motion_x >> 1));
986
21af69f7
FB
987 sub_pixels_2(s->block[0], ptr, s->linesize, dxy);
988 sub_pixels_2(s->block[1], ptr + 8, s->linesize, dxy);
989 sub_pixels_2(s->block[2], ptr + s->linesize * 8, s->linesize, dxy);
990 sub_pixels_2(s->block[3], ptr + 8 + s->linesize * 8, s->linesize ,dxy);
de6d9b64
FB
991
992 if (s->out_format == FMT_H263) {
993 /* special rounding for h263 */
994 dxy = 0;
995 if ((motion_x & 3) != 0)
996 dxy |= 1;
997 if ((motion_y & 3) != 0)
998 dxy |= 2;
999 mx = motion_x >> 2;
1000 my = motion_y >> 2;
1001 } else {
1002 mx = motion_x / 2;
1003 my = motion_y / 2;
1004 dxy = ((my & 1) << 1) | (mx & 1);
1005 mx >>= 1;
1006 my >>= 1;
1007 }
1008 offset = ((mb_y * 8 + my) * (s->linesize >> 1)) + (mb_x * 8 + mx);
1009 ptr = s->last_picture[1] + offset;
21af69f7 1010 sub_pixels_2(s->block[4], ptr, s->linesize >> 1, dxy);
de6d9b64 1011 ptr = s->last_picture[2] + offset;
21af69f7 1012 sub_pixels_2(s->block[5], ptr, s->linesize >> 1, dxy);
de6d9b64 1013 }
3bb4e23a 1014 emms_c();
de6d9b64
FB
1015
1016 /* DCT & quantize */
1017 if (s->h263_msmpeg4) {
1018 msmpeg4_dc_scale(s);
1019 } else if (s->h263_pred) {
1020 h263_dc_scale(s);
1021 } else {
1022 /* default quantization values */
1023 s->y_dc_scale = 8;
1024 s->c_dc_scale = 8;
1025 }
de6d9b64 1026 for(i=0;i<6;i++) {
2f349de2 1027 s->block_last_index[i] = dct_quantize(s, s->block[i], i, s->qscale);
de6d9b64
FB
1028 }
1029
1030 /* huffman encode */
1031 switch(s->out_format) {
1032 case FMT_MPEG1:
21af69f7 1033 mpeg1_encode_mb(s, s->block, motion_x, motion_y);
de6d9b64
FB
1034 break;
1035 case FMT_H263:
1036 if (s->h263_msmpeg4)
21af69f7 1037 msmpeg4_encode_mb(s, s->block, motion_x, motion_y);
de6d9b64 1038 else
21af69f7 1039 h263_encode_mb(s, s->block, motion_x, motion_y);
de6d9b64
FB
1040 break;
1041 case FMT_MJPEG:
21af69f7 1042 mjpeg_encode_mb(s, s->block);
de6d9b64
FB
1043 break;
1044 }
1045
1046 /* decompress blocks so that we keep the state of the decoder */
1047 s->mv[0][0][0] = motion_x;
1048 s->mv[0][0][1] = motion_y;
1049
21af69f7 1050 MPV_decode_mb(s, s->block);
de6d9b64 1051 }
81401c1f
J
1052 /* Obtain average GOB size for RTP */
1053 if (s->rtp_mode) {
1054 if (!mb_y)
1055 s->mb_line_avgsize = s->pb.buf_ptr - s->ptr_last_mb_line;
1056 else if (!(mb_y % s->gob_index)) {
1057 s->mb_line_avgsize = (s->mb_line_avgsize + s->pb.buf_ptr - s->ptr_last_mb_line) >> 1;
1058 s->ptr_last_mb_line = s->pb.buf_ptr;
1059 }
1060 //fprintf(stderr, "\nMB line: %d\tSize: %u\tAvg. Size: %u", s->mb_y,
1061 // (s->pb.buf_ptr - s->ptr_last_mb_line), s->mb_line_avgsize);
1062 s->first_gob_line = 0;
1063 }
de6d9b64 1064 }
ae40484c
MN
1065
1066 if (s->h263_msmpeg4)
1067 msmpeg4_encode_ext_header(s);
1068
644d98a4
J
1069 //if (s->gob_number)
1070 // fprintf(stderr,"\nNumber of GOB: %d", s->gob_number);
81401c1f
J
1071
1072 /* Send the last GOB if RTP */
1073 if (s->rtp_mode) {
1074 flush_put_bits(&s->pb);
1075 pdif = s->pb.buf_ptr - s->ptr_lastgob;
1076 /* Call the RTP callback to send the last GOB */
1077 if (s->rtp_callback)
1078 s->rtp_callback(s->ptr_lastgob, pdif, s->gob_number);
1079 s->ptr_lastgob = s->pb.buf_ptr;
1080 //fprintf(stderr,"\nGOB: %2d size: %d (last)", s->gob_number, pdif);
1081 }
1082
de6d9b64
FB
1083}
1084
2f349de2 1085static int dct_quantize_c(MpegEncContext *s,
de6d9b64
FB
1086 DCTELEM *block, int n,
1087 int qscale)
1088{
1089 int i, j, level, last_non_zero, q;
1090 const int *qmat;
4e3269e8
MN
1091 int minLevel, maxLevel;
1092
1093 if(s->avctx!=NULL && s->avctx->codec->id==CODEC_ID_MPEG4){
1094 /* mpeg4 */
1095 minLevel= -2048;
1096 maxLevel= 2047;
1097 }else if(s->out_format==FMT_MPEG1){
1098 /* mpeg1 */
1099 minLevel= -255;
1100 maxLevel= 255;
3cb32e3d
A
1101 }else if(s->out_format==FMT_MJPEG){
1102 /* (m)jpeg */
1103 minLevel= -1023;
1104 maxLevel= 1023;
4e3269e8
MN
1105 }else{
1106 /* h263 / msmpeg4 */
1107 minLevel= -128;
1108 maxLevel= 127;
1109 }
de6d9b64
FB
1110
1111 av_fdct (block);
1112
1a565432
FB
1113 /* we need this permutation so that we correct the IDCT
1114 permutation. will be moved into DCT code */
1115 block_permute(block);
1116
de6d9b64
FB
1117 if (s->mb_intra) {
1118 if (n < 4)
1119 q = s->y_dc_scale;
1120 else
1121 q = s->c_dc_scale;
1122 q = q << 3;
1123
1124 /* note: block[0] is assumed to be positive */
1125 block[0] = (block[0] + (q >> 1)) / q;
1126 i = 1;
1127 last_non_zero = 0;
1128 if (s->out_format == FMT_H263) {
1129 qmat = s->q_non_intra_matrix;
1130 } else {
1131 qmat = s->q_intra_matrix;
1132 }
1133 } else {
1134 i = 0;
1135 last_non_zero = -1;
1136 qmat = s->q_non_intra_matrix;
1137 }
1138
1139 for(;i<64;i++) {
1140 j = zigzag_direct[i];
1141 level = block[j];
1142 level = level * qmat[j];
1143#ifdef PARANOID
1144 {
1145 static int count = 0;
1146 int level1, level2, qmat1;
1147 double val;
1148 if (qmat == s->q_non_intra_matrix) {
1149 qmat1 = default_non_intra_matrix[j] * s->qscale;
1150 } else {
1151 qmat1 = default_intra_matrix[j] * s->qscale;
1152 }
1153 if (av_fdct != jpeg_fdct_ifast)
1154 val = ((double)block[j] * 8.0) / (double)qmat1;
1155 else
1156 val = ((double)block[j] * 8.0 * 2048.0) /
1157 ((double)qmat1 * aanscales[j]);
1158 level1 = (int)val;
1159 level2 = level / (1 << (QMAT_SHIFT - 3));
1160 if (level1 != level2) {
1161 fprintf(stderr, "%d: quant error qlevel=%d wanted=%d level=%d qmat1=%d qmat=%d wantedf=%0.6f\n",
1162 count, level2, level1, block[j], qmat1, qmat[j],
1163 val);
1164 count++;
1165 }
1166
1167 }
1168#endif
1169 /* XXX: slight error for the low range. Test should be equivalent to
1170 (level <= -(1 << (QMAT_SHIFT - 3)) || level >= (1 <<
1171 (QMAT_SHIFT - 3)))
1172 */
1173 if (((level << (31 - (QMAT_SHIFT - 3))) >> (31 - (QMAT_SHIFT - 3))) !=
1174 level) {
1175 level = level / (1 << (QMAT_SHIFT - 3));
1176 /* XXX: currently, this code is not optimal. the range should be:
1177 mpeg1: -255..255
1178 mpeg2: -2048..2047
1179 h263: -128..127
1180 mpeg4: -2048..2047
1181 */
4e3269e8
MN
1182 if (level > maxLevel)
1183 level = maxLevel;
1184 else if (level < minLevel)
1185 level = minLevel;
de6d9b64 1186
de6d9b64
FB
1187 block[j] = level;
1188 last_non_zero = i;
1189 } else {
1190 block[j] = 0;
1191 }
1192 }
1193 return last_non_zero;
1194}
1195
21af69f7
FB
1196static void dct_unquantize_mpeg1_c(MpegEncContext *s,
1197 DCTELEM *block, int n, int qscale)
de6d9b64 1198{
badaf88e 1199 int i, level, nCoeffs;
de6d9b64
FB
1200 const UINT16 *quant_matrix;
1201
badaf88e
MN
1202 if(s->alternate_scan) nCoeffs= 64;
1203 else nCoeffs= s->block_last_index[n]+1;
1204
de6d9b64
FB
1205 if (s->mb_intra) {
1206 if (n < 4)
1207 block[0] = block[0] * s->y_dc_scale;
1208 else
1209 block[0] = block[0] * s->c_dc_scale;
de6d9b64
FB
1210 /* XXX: only mpeg1 */
1211 quant_matrix = s->intra_matrix;
badaf88e
MN
1212 for(i=1;i<nCoeffs;i++) {
1213 int j= zigzag_direct[i];
1214 level = block[j];
de6d9b64
FB
1215 if (level) {
1216 if (level < 0) {
1217 level = -level;
badaf88e 1218 level = (int)(level * qscale * quant_matrix[j]) >> 3;
de6d9b64
FB
1219 level = (level - 1) | 1;
1220 level = -level;
1221 } else {
badaf88e 1222 level = (int)(level * qscale * quant_matrix[j]) >> 3;
de6d9b64
FB
1223 level = (level - 1) | 1;
1224 }
1225#ifdef PARANOID
1226 if (level < -2048 || level > 2047)
1227 fprintf(stderr, "unquant error %d %d\n", i, level);
1228#endif
badaf88e 1229 block[j] = level;
de6d9b64
FB
1230 }
1231 }
1232 } else {
1233 i = 0;
de6d9b64 1234 quant_matrix = s->non_intra_matrix;
d2b3c3d7 1235 for(;i<nCoeffs;i++) {
badaf88e
MN
1236 int j= zigzag_direct[i];
1237 level = block[j];
de6d9b64
FB
1238 if (level) {
1239 if (level < 0) {
1240 level = -level;
1241 level = (((level << 1) + 1) * qscale *
badaf88e 1242 ((int) (quant_matrix[j]))) >> 4;
de6d9b64
FB
1243 level = (level - 1) | 1;
1244 level = -level;
1245 } else {
1246 level = (((level << 1) + 1) * qscale *
badaf88e 1247 ((int) (quant_matrix[j]))) >> 4;
de6d9b64
FB
1248 level = (level - 1) | 1;
1249 }
1250#ifdef PARANOID
1251 if (level < -2048 || level > 2047)
1252 fprintf(stderr, "unquant error %d %d\n", i, level);
1253#endif
badaf88e 1254 block[j] = level;
de6d9b64
FB
1255 }
1256 }
1257 }
1258}
21af69f7
FB
1259
1260static void dct_unquantize_h263_c(MpegEncContext *s,
1261 DCTELEM *block, int n, int qscale)
1262{
1263 int i, level, qmul, qadd;
badaf88e 1264 int nCoeffs;
21af69f7
FB
1265
1266 if (s->mb_intra) {
1267 if (n < 4)
1268 block[0] = block[0] * s->y_dc_scale;
1269 else
1270 block[0] = block[0] * s->c_dc_scale;
1271 i = 1;
badaf88e 1272 nCoeffs= 64; //does not allways use zigzag table
21af69f7
FB
1273 } else {
1274 i = 0;
badaf88e 1275 nCoeffs= zigzag_end[ s->block_last_index[n] ];
21af69f7
FB
1276 }
1277
1278 qmul = s->qscale << 1;
1279 qadd = (s->qscale - 1) | 1;
1280
badaf88e 1281 for(;i<nCoeffs;i++) {
21af69f7
FB
1282 level = block[i];
1283 if (level) {
1284 if (level < 0) {
1285 level = level * qmul - qadd;
1286 } else {
1287 level = level * qmul + qadd;
1288 }
1289#ifdef PARANOID
1290 if (level < -2048 || level > 2047)
1291 fprintf(stderr, "unquant error %d %d\n", i, level);
1292#endif
1293 block[i] = level;
1294 }
1295 }
1296}
de6d9b64
FB
1297
1298/* rate control */
1299
1300/* an I frame is I_FRAME_SIZE_RATIO bigger than a P frame */
1301#define I_FRAME_SIZE_RATIO 3.0
1302#define QSCALE_K 20
1303
1304static void rate_control_init(MpegEncContext *s)
1305{
1306 s->wanted_bits = 0;
1307
1308 if (s->intra_only) {
1309 s->I_frame_bits = ((INT64)s->bit_rate * FRAME_RATE_BASE) / s->frame_rate;
1310 s->P_frame_bits = s->I_frame_bits;
1311 } else {
1312 s->P_frame_bits = (int) ((float)(s->gop_size * s->bit_rate) /
1313 (float)((float)s->frame_rate / FRAME_RATE_BASE * (I_FRAME_SIZE_RATIO + s->gop_size - 1)));
1314 s->I_frame_bits = (int)(s->P_frame_bits * I_FRAME_SIZE_RATIO);
1315 }
1316
1317#if defined(DEBUG)
1318 printf("I_frame_size=%d P_frame_size=%d\n",
1319 s->I_frame_bits, s->P_frame_bits);
1320#endif
1321}
1322
1323
1324/*
1325 * This heuristic is rather poor, but at least we do not have to
1326 * change the qscale at every macroblock.
1327 */
1328static int rate_estimate_qscale(MpegEncContext *s)
1329{
fb4a9613 1330 INT64 diff, total_bits = s->total_bits;
de6d9b64 1331 float q;
fb4a9613 1332 int qscale, qmin;
de6d9b64
FB
1333
1334 if (s->pict_type == I_TYPE) {
1335 s->wanted_bits += s->I_frame_bits;
1336 } else {
1337 s->wanted_bits += s->P_frame_bits;
1338 }
1339 diff = s->wanted_bits - total_bits;
1340 q = 31.0 - (float)diff / (QSCALE_K * s->mb_height * s->mb_width);
1341 /* adjust for I frame */
1342 if (s->pict_type == I_TYPE && !s->intra_only) {
1343 q /= I_FRAME_SIZE_RATIO;
1344 }
1345
1346 /* using a too small Q scale leeds to problems in mpeg1 and h263
1347 because AC coefficients are clamped to 255 or 127 */
1348 qmin = 3;
1349 if (q < qmin)
1350 q = qmin;
1351 else if (q > 31)
1352 q = 31;
1353 qscale = (int)(q + 0.5);
1354#if defined(DEBUG)
1a565432 1355 printf("%d: total=%0.0f br=%0.1f diff=%d qest=%0.1f\n",
de6d9b64 1356 s->picture_number,
1a565432 1357 (double)total_bits,
de6d9b64
FB
1358 (float)s->frame_rate / FRAME_RATE_BASE *
1359 total_bits / s->picture_number,
1360 diff, q);
1361#endif
1362 return qscale;
1363}
1364
1365AVCodec mpeg1video_encoder = {
1366 "mpeg1video",
1367 CODEC_TYPE_VIDEO,
1368 CODEC_ID_MPEG1VIDEO,
1369 sizeof(MpegEncContext),
1370 MPV_encode_init,
1371 MPV_encode_picture,
1372 MPV_encode_end,
1373};
1374
1375AVCodec h263_encoder = {
1376 "h263",
1377 CODEC_TYPE_VIDEO,
1378 CODEC_ID_H263,
1379 sizeof(MpegEncContext),
1380 MPV_encode_init,
1381 MPV_encode_picture,
1382 MPV_encode_end,
1383};
1384
1385AVCodec h263p_encoder = {
1386 "h263p",
1387 CODEC_TYPE_VIDEO,
1388 CODEC_ID_H263P,
1389 sizeof(MpegEncContext),
1390 MPV_encode_init,
1391 MPV_encode_picture,
1392 MPV_encode_end,
1393};
1394
1395AVCodec rv10_encoder = {
1396 "rv10",
1397 CODEC_TYPE_VIDEO,
1398 CODEC_ID_RV10,
1399 sizeof(MpegEncContext),
1400 MPV_encode_init,
1401 MPV_encode_picture,
1402 MPV_encode_end,
1403};
1404
1405AVCodec mjpeg_encoder = {
1406 "mjpeg",
1407 CODEC_TYPE_VIDEO,
1408 CODEC_ID_MJPEG,
1409 sizeof(MpegEncContext),
1410 MPV_encode_init,
1411 MPV_encode_picture,
1412 MPV_encode_end,
1413};
1414
58f26ba9
FB
1415AVCodec mpeg4_encoder = {
1416 "mpeg4",
de6d9b64 1417 CODEC_TYPE_VIDEO,
58f26ba9 1418 CODEC_ID_MPEG4,
de6d9b64
FB
1419 sizeof(MpegEncContext),
1420 MPV_encode_init,
1421 MPV_encode_picture,
1422 MPV_encode_end,
1423};
1424
1425AVCodec msmpeg4_encoder = {
1426 "msmpeg4",
1427 CODEC_TYPE_VIDEO,
1428 CODEC_ID_MSMPEG4,
1429 sizeof(MpegEncContext),
1430 MPV_encode_init,
1431 MPV_encode_picture,
1432 MPV_encode_end,
1433};