3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of Libav.
8 * Libav is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * Libav is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "error_resilience.h"
25 #include "mpegutils.h"
26 #include "mpegvideo.h"
27 #include "mpeg4video.h"
31 /* The defines below define the number of bits that are read at once for
32 * reading vlc values. Changing these may improve speed and data cache needs
33 * be aware though that decreasing them may need the number of stages that is
34 * passed to get_vlc* to be increased. */
35 #define SPRITE_TRAJ_VLC_BITS 6
37 #define MB_TYPE_B_VLC_BITS 4
39 static VLC dc_lum, dc_chrom;
40 static VLC sprite_trajectory;
41 static VLC mb_type_b_vlc;
43 static const int mb_type_b_map[4] = {
44 MB_TYPE_DIRECT2 | MB_TYPE_L0L1,
45 MB_TYPE_L0L1 | MB_TYPE_16x16,
46 MB_TYPE_L1 | MB_TYPE_16x16,
47 MB_TYPE_L0 | MB_TYPE_16x16,
52 * @param n block index (0-3 are luma, 4-5 are chroma)
53 * @param dir the ac prediction direction
55 void ff_mpeg4_pred_ac(MpegEncContext *s, int16_t *block, int n, int dir)
58 int16_t *ac_val, *ac_val1;
59 int8_t *const qscale_table = s->current_picture.qscale_table;
62 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
66 const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride;
70 if (s->mb_x == 0 || s->qscale == qscale_table[xy] ||
73 for (i = 1; i < 8; i++)
74 block[s->dsp.idct_permutation[i << 3]] += ac_val[i];
76 /* different qscale, we must rescale */
77 for (i = 1; i < 8; i++)
78 block[s->dsp.idct_permutation[i << 3]] += ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale);
81 const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride;
83 ac_val -= 16 * s->block_wrap[n];
85 if (s->mb_y == 0 || s->qscale == qscale_table[xy] ||
88 for (i = 1; i < 8; i++)
89 block[s->dsp.idct_permutation[i]] += ac_val[i + 8];
91 /* different qscale, we must rescale */
92 for (i = 1; i < 8; i++)
93 block[s->dsp.idct_permutation[i]] += ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale);
98 for (i = 1; i < 8; i++)
99 ac_val1[i] = block[s->dsp.idct_permutation[i << 3]];
102 for (i = 1; i < 8; i++)
103 ac_val1[8 + i] = block[s->dsp.idct_permutation[i]];
107 * check if the next stuff is a resync marker or the end.
110 static inline int mpeg4_is_resync(MpegEncContext *s)
112 int bits_count = get_bits_count(&s->gb);
113 int v = show_bits(&s->gb, 16);
115 if (s->workaround_bugs & FF_BUG_NO_PADDING)
119 if (s->pict_type == AV_PICTURE_TYPE_B ||
120 (v >> (8 - s->pict_type) != 1) || s->partitioned_frame)
122 skip_bits(&s->gb, 8 + s->pict_type);
123 bits_count += 8 + s->pict_type;
124 v = show_bits(&s->gb, 16);
127 if (bits_count + 8 >= s->gb.size_in_bits) {
129 v |= 0x7F >> (7 - (bits_count & 7));
134 if (v == ff_mpeg4_resync_prefix[bits_count & 7]) {
136 GetBitContext gb = s->gb;
138 skip_bits(&s->gb, 1);
139 align_get_bits(&s->gb);
141 for (len = 0; len < 32; len++)
142 if (get_bits1(&s->gb))
147 if (len >= ff_mpeg4_get_video_packet_prefix_length(s))
154 static int mpeg4_decode_sprite_trajectory(Mpeg4DecContext *ctx, GetBitContext *gb)
156 MpegEncContext *s = &ctx->m;
157 int a = 2 << s->sprite_warping_accuracy;
158 int rho = 3 - s->sprite_warping_accuracy;
164 int min_ab, i, w2, h2, w3, h3;
165 int sprite_ref[4][2];
166 int virtual_ref[2][2];
168 // only true for rectangle shapes
169 const int vop_ref[4][2] = { { 0, 0 }, { s->width, 0 },
170 { 0, s->height }, { s->width, s->height } };
171 int d[4][2] = { { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 } };
173 if (w <= 0 || h <= 0)
174 return AVERROR_INVALIDDATA;
176 for (i = 0; i < ctx->num_sprite_warping_points; i++) {
180 length = get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3);
182 x = get_xbits(gb, length);
184 if (!(ctx->divx_version == 500 && ctx->divx_build == 413))
185 skip_bits1(gb); /* marker bit */
187 length = get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3);
189 y = get_xbits(gb, length);
191 skip_bits1(gb); /* marker bit */
192 ctx->sprite_traj[i][0] = d[i][0] = x;
193 ctx->sprite_traj[i][1] = d[i][1] = y;
196 ctx->sprite_traj[i][0] = ctx->sprite_traj[i][1] = 0;
198 while ((1 << alpha) < w)
200 while ((1 << beta) < h)
201 beta++; /* typo in the mpeg4 std for the definition of w' and h' */
205 // Note, the 4th point isn't used for GMC
206 if (ctx->divx_version == 500 && ctx->divx_build == 413) {
207 sprite_ref[0][0] = a * vop_ref[0][0] + d[0][0];
208 sprite_ref[0][1] = a * vop_ref[0][1] + d[0][1];
209 sprite_ref[1][0] = a * vop_ref[1][0] + d[0][0] + d[1][0];
210 sprite_ref[1][1] = a * vop_ref[1][1] + d[0][1] + d[1][1];
211 sprite_ref[2][0] = a * vop_ref[2][0] + d[0][0] + d[2][0];
212 sprite_ref[2][1] = a * vop_ref[2][1] + d[0][1] + d[2][1];
214 sprite_ref[0][0] = (a >> 1) * (2 * vop_ref[0][0] + d[0][0]);
215 sprite_ref[0][1] = (a >> 1) * (2 * vop_ref[0][1] + d[0][1]);
216 sprite_ref[1][0] = (a >> 1) * (2 * vop_ref[1][0] + d[0][0] + d[1][0]);
217 sprite_ref[1][1] = (a >> 1) * (2 * vop_ref[1][1] + d[0][1] + d[1][1]);
218 sprite_ref[2][0] = (a >> 1) * (2 * vop_ref[2][0] + d[0][0] + d[2][0]);
219 sprite_ref[2][1] = (a >> 1) * (2 * vop_ref[2][1] + d[0][1] + d[2][1]);
221 /* sprite_ref[3][0] = (a >> 1) * (2 * vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]);
222 * sprite_ref[3][1] = (a >> 1) * (2 * vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */
224 /* this is mostly identical to the mpeg4 std (and is totally unreadable
225 * because of that...). Perhaps it should be reordered to be more readable.
226 * The idea behind this virtual_ref mess is to be able to use shifts later
227 * per pixel instead of divides so the distance between points is converted
228 * from w&h based to w2&h2 based which are of the 2^x form. */
229 virtual_ref[0][0] = 16 * (vop_ref[0][0] + w2) +
230 ROUNDED_DIV(((w - w2) *
231 (r * sprite_ref[0][0] - 16 * vop_ref[0][0]) +
232 w2 * (r * sprite_ref[1][0] - 16 * vop_ref[1][0])), w);
233 virtual_ref[0][1] = 16 * vop_ref[0][1] +
234 ROUNDED_DIV(((w - w2) *
235 (r * sprite_ref[0][1] - 16 * vop_ref[0][1]) +
236 w2 * (r * sprite_ref[1][1] - 16 * vop_ref[1][1])), w);
237 virtual_ref[1][0] = 16 * vop_ref[0][0] +
238 ROUNDED_DIV(((h - h2) * (r * sprite_ref[0][0] - 16 * vop_ref[0][0]) +
239 h2 * (r * sprite_ref[2][0] - 16 * vop_ref[2][0])), h);
240 virtual_ref[1][1] = 16 * (vop_ref[0][1] + h2) +
241 ROUNDED_DIV(((h - h2) * (r * sprite_ref[0][1] - 16 * vop_ref[0][1]) +
242 h2 * (r * sprite_ref[2][1] - 16 * vop_ref[2][1])), h);
244 switch (ctx->num_sprite_warping_points) {
246 s->sprite_offset[0][0] =
247 s->sprite_offset[0][1] =
248 s->sprite_offset[1][0] =
249 s->sprite_offset[1][1] = 0;
250 s->sprite_delta[0][0] = a;
251 s->sprite_delta[0][1] =
252 s->sprite_delta[1][0] = 0;
253 s->sprite_delta[1][1] = a;
254 ctx->sprite_shift[0] =
255 ctx->sprite_shift[1] = 0;
258 s->sprite_offset[0][0] = sprite_ref[0][0] - a * vop_ref[0][0];
259 s->sprite_offset[0][1] = sprite_ref[0][1] - a * vop_ref[0][1];
260 s->sprite_offset[1][0] = ((sprite_ref[0][0] >> 1) | (sprite_ref[0][0] & 1)) -
261 a * (vop_ref[0][0] / 2);
262 s->sprite_offset[1][1] = ((sprite_ref[0][1] >> 1) | (sprite_ref[0][1] & 1)) -
263 a * (vop_ref[0][1] / 2);
264 s->sprite_delta[0][0] = a;
265 s->sprite_delta[0][1] =
266 s->sprite_delta[1][0] = 0;
267 s->sprite_delta[1][1] = a;
268 ctx->sprite_shift[0] =
269 ctx->sprite_shift[1] = 0;
272 s->sprite_offset[0][0] = (sprite_ref[0][0] << (alpha + rho)) +
273 (-r * sprite_ref[0][0] + virtual_ref[0][0]) *
275 (r * sprite_ref[0][1] - virtual_ref[0][1]) *
276 (-vop_ref[0][1]) + (1 << (alpha + rho - 1));
277 s->sprite_offset[0][1] = (sprite_ref[0][1] << (alpha + rho)) +
278 (-r * sprite_ref[0][1] + virtual_ref[0][1]) *
280 (-r * sprite_ref[0][0] + virtual_ref[0][0]) *
281 (-vop_ref[0][1]) + (1 << (alpha + rho - 1));
282 s->sprite_offset[1][0] = ((-r * sprite_ref[0][0] + virtual_ref[0][0]) *
283 (-2 * vop_ref[0][0] + 1) +
284 (r * sprite_ref[0][1] - virtual_ref[0][1]) *
285 (-2 * vop_ref[0][1] + 1) + 2 * w2 * r *
286 sprite_ref[0][0] - 16 * w2 + (1 << (alpha + rho + 1)));
287 s->sprite_offset[1][1] = ((-r * sprite_ref[0][1] + virtual_ref[0][1]) *
288 (-2 * vop_ref[0][0] + 1) +
289 (-r * sprite_ref[0][0] + virtual_ref[0][0]) *
290 (-2 * vop_ref[0][1] + 1) + 2 * w2 * r *
291 sprite_ref[0][1] - 16 * w2 + (1 << (alpha + rho + 1)));
292 s->sprite_delta[0][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]);
293 s->sprite_delta[0][1] = (+r * sprite_ref[0][1] - virtual_ref[0][1]);
294 s->sprite_delta[1][0] = (-r * sprite_ref[0][1] + virtual_ref[0][1]);
295 s->sprite_delta[1][1] = (-r * sprite_ref[0][0] + virtual_ref[0][0]);
297 ctx->sprite_shift[0] = alpha + rho;
298 ctx->sprite_shift[1] = alpha + rho + 2;
301 min_ab = FFMIN(alpha, beta);
304 s->sprite_offset[0][0] = (sprite_ref[0][0] << (alpha + beta + rho - min_ab)) +
305 (-r * sprite_ref[0][0] + virtual_ref[0][0]) *
306 h3 * (-vop_ref[0][0]) +
307 (-r * sprite_ref[0][0] + virtual_ref[1][0]) *
308 w3 * (-vop_ref[0][1]) +
309 (1 << (alpha + beta + rho - min_ab - 1));
310 s->sprite_offset[0][1] = (sprite_ref[0][1] << (alpha + beta + rho - min_ab)) +
311 (-r * sprite_ref[0][1] + virtual_ref[0][1]) *
312 h3 * (-vop_ref[0][0]) +
313 (-r * sprite_ref[0][1] + virtual_ref[1][1]) *
314 w3 * (-vop_ref[0][1]) +
315 (1 << (alpha + beta + rho - min_ab - 1));
316 s->sprite_offset[1][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]) *
317 h3 * (-2 * vop_ref[0][0] + 1) +
318 (-r * sprite_ref[0][0] + virtual_ref[1][0]) *
319 w3 * (-2 * vop_ref[0][1] + 1) + 2 * w2 * h3 *
320 r * sprite_ref[0][0] - 16 * w2 * h3 +
321 (1 << (alpha + beta + rho - min_ab + 1));
322 s->sprite_offset[1][1] = (-r * sprite_ref[0][1] + virtual_ref[0][1]) *
323 h3 * (-2 * vop_ref[0][0] + 1) +
324 (-r * sprite_ref[0][1] + virtual_ref[1][1]) *
325 w3 * (-2 * vop_ref[0][1] + 1) + 2 * w2 * h3 *
326 r * sprite_ref[0][1] - 16 * w2 * h3 +
327 (1 << (alpha + beta + rho - min_ab + 1));
328 s->sprite_delta[0][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]) * h3;
329 s->sprite_delta[0][1] = (-r * sprite_ref[0][0] + virtual_ref[1][0]) * w3;
330 s->sprite_delta[1][0] = (-r * sprite_ref[0][1] + virtual_ref[0][1]) * h3;
331 s->sprite_delta[1][1] = (-r * sprite_ref[0][1] + virtual_ref[1][1]) * w3;
333 ctx->sprite_shift[0] = alpha + beta + rho - min_ab;
334 ctx->sprite_shift[1] = alpha + beta + rho - min_ab + 2;
337 /* try to simplify the situation */
338 if (s->sprite_delta[0][0] == a << ctx->sprite_shift[0] &&
339 s->sprite_delta[0][1] == 0 &&
340 s->sprite_delta[1][0] == 0 &&
341 s->sprite_delta[1][1] == a << ctx->sprite_shift[0]) {
342 s->sprite_offset[0][0] >>= ctx->sprite_shift[0];
343 s->sprite_offset[0][1] >>= ctx->sprite_shift[0];
344 s->sprite_offset[1][0] >>= ctx->sprite_shift[1];
345 s->sprite_offset[1][1] >>= ctx->sprite_shift[1];
346 s->sprite_delta[0][0] = a;
347 s->sprite_delta[0][1] = 0;
348 s->sprite_delta[1][0] = 0;
349 s->sprite_delta[1][1] = a;
350 ctx->sprite_shift[0] = 0;
351 ctx->sprite_shift[1] = 0;
352 s->real_sprite_warping_points = 1;
354 int shift_y = 16 - ctx->sprite_shift[0];
355 int shift_c = 16 - ctx->sprite_shift[1];
356 for (i = 0; i < 2; i++) {
357 s->sprite_offset[0][i] <<= shift_y;
358 s->sprite_offset[1][i] <<= shift_c;
359 s->sprite_delta[0][i] <<= shift_y;
360 s->sprite_delta[1][i] <<= shift_y;
361 ctx->sprite_shift[i] = 16;
363 s->real_sprite_warping_points = ctx->num_sprite_warping_points;
370 * Decode the next video packet.
371 * @return <0 if something went wrong
373 int ff_mpeg4_decode_video_packet_header(Mpeg4DecContext *ctx)
375 MpegEncContext *s = &ctx->m;
377 int mb_num_bits = av_log2(s->mb_num - 1) + 1;
378 int header_extension = 0, mb_num, len;
380 /* is there enough space left for a video packet + header */
381 if (get_bits_count(&s->gb) > s->gb.size_in_bits - 20)
384 for (len = 0; len < 32; len++)
385 if (get_bits1(&s->gb))
388 if (len != ff_mpeg4_get_video_packet_prefix_length(s)) {
389 av_log(s->avctx, AV_LOG_ERROR, "marker does not match f_code\n");
393 if (ctx->shape != RECT_SHAPE) {
394 header_extension = get_bits1(&s->gb);
395 // FIXME more stuff here
398 mb_num = get_bits(&s->gb, mb_num_bits);
399 if (mb_num >= s->mb_num) {
400 av_log(s->avctx, AV_LOG_ERROR,
401 "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num);
404 if (s->pict_type == AV_PICTURE_TYPE_B) {
405 int mb_x = 0, mb_y = 0;
407 while (s->next_picture.mbskip_table[s->mb_index2xy[mb_num]]) {
409 ff_thread_await_progress(&s->next_picture_ptr->tf, mb_y++, 0);
411 if (++mb_x == s->mb_width)
414 if (mb_num >= s->mb_num)
415 return -1; // slice contains just skipped MBs (already decoded)
418 s->mb_x = mb_num % s->mb_width;
419 s->mb_y = mb_num / s->mb_width;
421 if (ctx->shape != BIN_ONLY_SHAPE) {
422 int qscale = get_bits(&s->gb, s->quant_precision);
424 s->chroma_qscale = s->qscale = qscale;
427 if (ctx->shape == RECT_SHAPE)
428 header_extension = get_bits1(&s->gb);
430 if (header_extension) {
433 while (get_bits1(&s->gb) != 0)
436 check_marker(&s->gb, "before time_increment in video packed header");
437 skip_bits(&s->gb, ctx->time_increment_bits); /* time_increment */
438 check_marker(&s->gb, "before vop_coding_type in video packed header");
440 skip_bits(&s->gb, 2); /* vop coding type */
441 // FIXME not rect stuff here
443 if (ctx->shape != BIN_ONLY_SHAPE) {
444 skip_bits(&s->gb, 3); /* intra dc vlc threshold */
445 // FIXME don't just ignore everything
446 if (s->pict_type == AV_PICTURE_TYPE_S &&
447 ctx->vol_sprite_usage == GMC_SPRITE) {
448 if (mpeg4_decode_sprite_trajectory(ctx, &s->gb) < 0)
449 return AVERROR_INVALIDDATA;
450 av_log(s->avctx, AV_LOG_ERROR, "untested\n");
453 // FIXME reduced res stuff here
455 if (s->pict_type != AV_PICTURE_TYPE_I) {
456 int f_code = get_bits(&s->gb, 3); /* fcode_for */
458 av_log(s->avctx, AV_LOG_ERROR,
459 "Error, video packet header damaged (f_code=0)\n");
461 if (s->pict_type == AV_PICTURE_TYPE_B) {
462 int b_code = get_bits(&s->gb, 3);
464 av_log(s->avctx, AV_LOG_ERROR,
465 "Error, video packet header damaged (b_code=0)\n");
469 // FIXME new-pred stuff
475 * Get the average motion vector for a GMC MB.
476 * @param n either 0 for the x component or 1 for y
477 * @return the average MV for a GMC MB
479 static inline int get_amv(Mpeg4DecContext *ctx, int n)
481 MpegEncContext *s = &ctx->m;
482 int x, y, mb_v, sum, dx, dy, shift;
483 int len = 1 << (s->f_code + 4);
484 const int a = s->sprite_warping_accuracy;
486 if (s->workaround_bugs & FF_BUG_AMV)
487 len >>= s->quarter_sample;
489 if (s->real_sprite_warping_points == 1) {
490 if (ctx->divx_version == 500 && ctx->divx_build == 413)
491 sum = s->sprite_offset[0][n] / (1 << (a - s->quarter_sample));
493 sum = RSHIFT(s->sprite_offset[0][n] << s->quarter_sample, a);
495 dx = s->sprite_delta[n][0];
496 dy = s->sprite_delta[n][1];
497 shift = ctx->sprite_shift[0];
499 dy -= 1 << (shift + a + 1);
501 dx -= 1 << (shift + a + 1);
502 mb_v = s->sprite_offset[0][n] + dx * s->mb_x * 16 + dy * s->mb_y * 16;
505 for (y = 0; y < 16; y++) {
510 for (x = 0; x < 16; x++) {
515 sum = RSHIFT(sum, a + 8 - s->quarter_sample);
527 * Decode the dc value.
528 * @param n block index (0-3 are luma, 4-5 are chroma)
529 * @param dir_ptr the prediction direction will be stored here
530 * @return the quantized dc
532 static inline int mpeg4_decode_dc(MpegEncContext *s, int n, int *dir_ptr)
537 code = get_vlc2(&s->gb, dc_lum.table, DC_VLC_BITS, 1);
539 code = get_vlc2(&s->gb, dc_chrom.table, DC_VLC_BITS, 1);
541 if (code < 0 || code > 9 /* && s->nbit < 9 */) {
542 av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n");
551 level = 2 * get_bits1(&s->gb) - 1;
553 if (get_bits1(&s->gb))
554 level = get_bits(&s->gb, code - 1) + (1 << (code - 1));
556 level = -get_bits(&s->gb, code - 1) - (1 << (code - 1));
559 level = get_xbits(&s->gb, code);
563 if (get_bits1(&s->gb) == 0) { /* marker */
564 if (s->err_recognition & AV_EF_BITSTREAM) {
565 av_log(s->avctx, AV_LOG_ERROR, "dc marker bit missing\n");
572 return ff_mpeg4_pred_dc(s, n, level, dir_ptr, 0);
576 * Decode first partition.
577 * @return number of MBs decoded or <0 if an error occurred
579 static int mpeg4_decode_partition_a(Mpeg4DecContext *ctx)
581 MpegEncContext *s = &ctx->m;
583 static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
585 /* decode first partition */
586 s->first_slice_line = 1;
587 for (; s->mb_y < s->mb_height; s->mb_y++) {
588 ff_init_block_index(s);
589 for (; s->mb_x < s->mb_width; s->mb_x++) {
590 const int xy = s->mb_x + s->mb_y * s->mb_stride;
595 ff_update_block_index(s);
596 if (s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y + 1)
597 s->first_slice_line = 0;
599 if (s->pict_type == AV_PICTURE_TYPE_I) {
603 if (show_bits_long(&s->gb, 19) == DC_MARKER)
606 cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
608 av_log(s->avctx, AV_LOG_ERROR,
609 "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
614 s->cbp_table[xy] = cbpc & 3;
615 s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
619 ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
621 s->current_picture.qscale_table[xy] = s->qscale;
623 s->mbintra_table[xy] = 1;
624 for (i = 0; i < 6; i++) {
626 int dc = mpeg4_decode_dc(s, i, &dc_pred_dir);
628 av_log(s->avctx, AV_LOG_ERROR,
629 "DC corrupted at %d %d\n", s->mb_x, s->mb_y);
636 s->pred_dir_table[xy] = dir;
637 } else { /* P/S_TYPE */
638 int mx, my, pred_x, pred_y, bits;
639 int16_t *const mot_val = s->current_picture.motion_val[0][s->block_index[0]];
640 const int stride = s->b8_stride * 2;
643 bits = show_bits(&s->gb, 17);
644 if (bits == MOTION_MARKER)
648 if (bits & 0x10000) {
650 if (s->pict_type == AV_PICTURE_TYPE_S &&
651 ctx->vol_sprite_usage == GMC_SPRITE) {
652 s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
656 mx = get_amv(ctx, 0);
657 my = get_amv(ctx, 1);
659 s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
666 mot_val[0 + stride] =
667 mot_val[2 + stride] = mx;
670 mot_val[1 + stride] =
671 mot_val[3 + stride] = my;
673 if (s->mbintra_table[xy])
674 ff_clean_intra_table_entries(s);
678 cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
680 av_log(s->avctx, AV_LOG_ERROR,
681 "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
687 s->cbp_table[xy] = cbpc & (8 + 3); // 8 is dquant
689 s->mb_intra = ((cbpc & 4) != 0);
692 s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
693 s->mbintra_table[xy] = 1;
696 mot_val[0 + stride] =
697 mot_val[2 + stride] = 0;
700 mot_val[1 + stride] =
701 mot_val[3 + stride] = 0;
703 if (s->mbintra_table[xy])
704 ff_clean_intra_table_entries(s);
706 if (s->pict_type == AV_PICTURE_TYPE_S &&
707 ctx->vol_sprite_usage == GMC_SPRITE &&
709 s->mcsel = get_bits1(&s->gb);
713 if ((cbpc & 16) == 0) {
714 /* 16x16 motion prediction */
716 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
718 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
722 my = ff_h263_decode_motion(s, pred_y, s->f_code);
725 s->current_picture.mb_type[xy] = MB_TYPE_16x16 |
728 mx = get_amv(ctx, 0);
729 my = get_amv(ctx, 1);
730 s->current_picture.mb_type[xy] = MB_TYPE_16x16 |
737 mot_val[0 + stride] =
738 mot_val[2 + stride] = mx;
741 mot_val[1 + stride] =
742 mot_val[3 + stride] = my;
745 s->current_picture.mb_type[xy] = MB_TYPE_8x8 |
747 for (i = 0; i < 4; i++) {
748 int16_t *mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
749 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
753 my = ff_h263_decode_motion(s, pred_y, s->f_code);
770 * decode second partition.
771 * @return <0 if an error occurred
773 static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count)
776 static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
778 s->mb_x = s->resync_mb_x;
779 s->first_slice_line = 1;
780 for (s->mb_y = s->resync_mb_y; mb_num < mb_count; s->mb_y++) {
781 ff_init_block_index(s);
782 for (; mb_num < mb_count && s->mb_x < s->mb_width; s->mb_x++) {
783 const int xy = s->mb_x + s->mb_y * s->mb_stride;
786 ff_update_block_index(s);
787 if (s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y + 1)
788 s->first_slice_line = 0;
790 if (s->pict_type == AV_PICTURE_TYPE_I) {
791 int ac_pred = get_bits1(&s->gb);
792 int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
794 av_log(s->avctx, AV_LOG_ERROR,
795 "cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
799 s->cbp_table[xy] |= cbpy << 2;
800 s->current_picture.mb_type[xy] |= ac_pred * MB_TYPE_ACPRED;
801 } else { /* P || S_TYPE */
802 if (IS_INTRA(s->current_picture.mb_type[xy])) {
805 int ac_pred = get_bits1(&s->gb);
806 int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
809 av_log(s->avctx, AV_LOG_ERROR,
810 "I cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
814 if (s->cbp_table[xy] & 8)
815 ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
816 s->current_picture.qscale_table[xy] = s->qscale;
818 for (i = 0; i < 6; i++) {
820 int dc = mpeg4_decode_dc(s, i, &dc_pred_dir);
822 av_log(s->avctx, AV_LOG_ERROR,
823 "DC corrupted at %d %d\n", s->mb_x, s->mb_y);
830 s->cbp_table[xy] &= 3; // remove dquant
831 s->cbp_table[xy] |= cbpy << 2;
832 s->current_picture.mb_type[xy] |= ac_pred * MB_TYPE_ACPRED;
833 s->pred_dir_table[xy] = dir;
834 } else if (IS_SKIP(s->current_picture.mb_type[xy])) {
835 s->current_picture.qscale_table[xy] = s->qscale;
836 s->cbp_table[xy] = 0;
838 int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
841 av_log(s->avctx, AV_LOG_ERROR,
842 "P cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
846 if (s->cbp_table[xy] & 8)
847 ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
848 s->current_picture.qscale_table[xy] = s->qscale;
850 s->cbp_table[xy] &= 3; // remove dquant
851 s->cbp_table[xy] |= (cbpy ^ 0xf) << 2;
855 if (mb_num >= mb_count)
863 * Decode the first and second partition.
864 * @return <0 if error (and sets error type in the error_status_table)
866 int ff_mpeg4_decode_partitions(Mpeg4DecContext *ctx)
868 MpegEncContext *s = &ctx->m;
870 const int part_a_error = s->pict_type == AV_PICTURE_TYPE_I ? (ER_DC_ERROR | ER_MV_ERROR) : ER_MV_ERROR;
871 const int part_a_end = s->pict_type == AV_PICTURE_TYPE_I ? (ER_DC_END | ER_MV_END) : ER_MV_END;
873 mb_num = mpeg4_decode_partition_a(ctx);
875 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
876 s->mb_x, s->mb_y, part_a_error);
880 if (s->resync_mb_x + s->resync_mb_y * s->mb_width + mb_num > s->mb_num) {
881 av_log(s->avctx, AV_LOG_ERROR, "slice below monitor ...\n");
882 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
883 s->mb_x, s->mb_y, part_a_error);
887 s->mb_num_left = mb_num;
889 if (s->pict_type == AV_PICTURE_TYPE_I) {
890 while (show_bits(&s->gb, 9) == 1)
891 skip_bits(&s->gb, 9);
892 if (get_bits_long(&s->gb, 19) != DC_MARKER) {
893 av_log(s->avctx, AV_LOG_ERROR,
894 "marker missing after first I partition at %d %d\n",
899 while (show_bits(&s->gb, 10) == 1)
900 skip_bits(&s->gb, 10);
901 if (get_bits(&s->gb, 17) != MOTION_MARKER) {
902 av_log(s->avctx, AV_LOG_ERROR,
903 "marker missing after first P partition at %d %d\n",
908 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
909 s->mb_x - 1, s->mb_y, part_a_end);
911 if (mpeg4_decode_partition_b(s, mb_num) < 0) {
912 if (s->pict_type == AV_PICTURE_TYPE_P)
913 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
914 s->mb_x, s->mb_y, ER_DC_ERROR);
917 if (s->pict_type == AV_PICTURE_TYPE_P)
918 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
919 s->mb_x - 1, s->mb_y, ER_DC_END);
927 * @return <0 if an error occurred
929 static inline int mpeg4_decode_block(Mpeg4DecContext *ctx, int16_t *block,
930 int n, int coded, int intra, int rvlc)
932 MpegEncContext *s = &ctx->m;
933 int level, i, last, run, qmul, qadd, dc_pred_dir;
936 const uint8_t *scan_table;
938 // Note intra & rvlc should be optimized away if this is inlined
941 if (ctx->use_intra_dc_vlc) {
943 if (s->partitioned_frame) {
944 level = s->dc_val[0][s->block_index[n]];
946 level = FASTDIV((level + (s->y_dc_scale >> 1)), s->y_dc_scale);
948 level = FASTDIV((level + (s->c_dc_scale >> 1)), s->c_dc_scale);
949 dc_pred_dir = (s->pred_dir_table[s->mb_x + s->mb_y * s->mb_stride] << n) & 32;
951 level = mpeg4_decode_dc(s, n, &dc_pred_dir);
959 ff_mpeg4_pred_dc(s, n, 0, &dc_pred_dir, 0);
965 rl = &ff_rvlc_rl_intra;
966 rl_vlc = ff_rvlc_rl_intra.rl_vlc[0];
968 rl = &ff_mpeg4_rl_intra;
969 rl_vlc = ff_mpeg4_rl_intra.rl_vlc[0];
972 if (dc_pred_dir == 0)
973 scan_table = s->intra_v_scantable.permutated; /* left */
975 scan_table = s->intra_h_scantable.permutated; /* top */
977 scan_table = s->intra_scantable.permutated;
984 s->block_last_index[n] = i;
988 rl = &ff_rvlc_rl_inter;
990 rl = &ff_h263_rl_inter;
992 scan_table = s->intra_scantable.permutated;
998 rl_vlc = ff_rvlc_rl_inter.rl_vlc[0];
1000 rl_vlc = ff_h263_rl_inter.rl_vlc[0];
1002 qmul = s->qscale << 1;
1003 qadd = (s->qscale - 1) | 1;
1005 rl_vlc = ff_rvlc_rl_inter.rl_vlc[s->qscale];
1007 rl_vlc = ff_h263_rl_inter.rl_vlc[s->qscale];
1011 OPEN_READER(re, &s->gb);
1013 UPDATE_CACHE(re, &s->gb);
1014 GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0);
1018 if (SHOW_UBITS(re, &s->gb, 1) == 0) {
1019 av_log(s->avctx, AV_LOG_ERROR,
1020 "1. marker bit missing in rvlc esc\n");
1023 SKIP_CACHE(re, &s->gb, 1);
1025 last = SHOW_UBITS(re, &s->gb, 1);
1026 SKIP_CACHE(re, &s->gb, 1);
1027 run = SHOW_UBITS(re, &s->gb, 6);
1028 SKIP_COUNTER(re, &s->gb, 1 + 1 + 6);
1029 UPDATE_CACHE(re, &s->gb);
1031 if (SHOW_UBITS(re, &s->gb, 1) == 0) {
1032 av_log(s->avctx, AV_LOG_ERROR,
1033 "2. marker bit missing in rvlc esc\n");
1036 SKIP_CACHE(re, &s->gb, 1);
1038 level = SHOW_UBITS(re, &s->gb, 11);
1039 SKIP_CACHE(re, &s->gb, 11);
1041 if (SHOW_UBITS(re, &s->gb, 5) != 0x10) {
1042 av_log(s->avctx, AV_LOG_ERROR, "reverse esc missing\n");
1045 SKIP_CACHE(re, &s->gb, 5);
1047 level = level * qmul + qadd;
1048 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1049 SKIP_COUNTER(re, &s->gb, 1 + 11 + 5 + 1);
1056 cache = GET_CACHE(re, &s->gb);
1059 cache ^= 0xC0000000;
1061 if (cache & 0x80000000) {
1062 if (cache & 0x40000000) {
1064 SKIP_CACHE(re, &s->gb, 2);
1065 last = SHOW_UBITS(re, &s->gb, 1);
1066 SKIP_CACHE(re, &s->gb, 1);
1067 run = SHOW_UBITS(re, &s->gb, 6);
1068 SKIP_COUNTER(re, &s->gb, 2 + 1 + 6);
1069 UPDATE_CACHE(re, &s->gb);
1072 level = SHOW_SBITS(re, &s->gb, 12);
1073 LAST_SKIP_BITS(re, &s->gb, 12);
1075 if (SHOW_UBITS(re, &s->gb, 1) == 0) {
1076 av_log(s->avctx, AV_LOG_ERROR,
1077 "1. marker bit missing in 3. esc\n");
1080 SKIP_CACHE(re, &s->gb, 1);
1082 level = SHOW_SBITS(re, &s->gb, 12);
1083 SKIP_CACHE(re, &s->gb, 12);
1085 if (SHOW_UBITS(re, &s->gb, 1) == 0) {
1086 av_log(s->avctx, AV_LOG_ERROR,
1087 "2. marker bit missing in 3. esc\n");
1091 SKIP_COUNTER(re, &s->gb, 1 + 12 + 1);
1095 level = level * qmul + qadd;
1097 level = level * qmul - qadd;
1099 if ((unsigned)(level + 2048) > 4095) {
1100 if (s->err_recognition & AV_EF_BITSTREAM) {
1101 if (level > 2560 || level < -2560) {
1102 av_log(s->avctx, AV_LOG_ERROR,
1103 "|level| overflow in 3. esc, qp=%d\n",
1108 level = level < 0 ? -2048 : 2047;
1116 SKIP_BITS(re, &s->gb, 2);
1117 GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1);
1118 i += run + rl->max_run[run >> 7][level / qmul] + 1; // FIXME opt indexing
1119 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1120 LAST_SKIP_BITS(re, &s->gb, 1);
1124 SKIP_BITS(re, &s->gb, 1);
1125 GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1);
1127 level = level + rl->max_level[run >> 7][(run - 1) & 63] * qmul; // FIXME opt indexing
1128 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1129 LAST_SKIP_BITS(re, &s->gb, 1);
1134 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1135 LAST_SKIP_BITS(re, &s->gb, 1);
1140 av_log(s->avctx, AV_LOG_ERROR,
1141 "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1145 block[scan_table[i]] = level;
1149 block[scan_table[i]] = level;
1151 CLOSE_READER(re, &s->gb);
1156 if (!ctx->use_intra_dc_vlc) {
1157 block[0] = ff_mpeg4_pred_dc(s, n, block[0], &dc_pred_dir, 0);
1159 i -= i >> 31; // if (i == -1) i = 0;
1162 ff_mpeg4_pred_ac(s, block, n, dc_pred_dir);
1164 i = 63; // FIXME not optimal
1166 s->block_last_index[n] = i;
1171 * decode partition C of one MB.
1172 * @return <0 if an error occurred
1174 static int mpeg4_decode_partitioned_mb(MpegEncContext *s, int16_t block[6][64])
1176 Mpeg4DecContext *ctx = (Mpeg4DecContext *)s;
1178 const int xy = s->mb_x + s->mb_y * s->mb_stride;
1180 mb_type = s->current_picture.mb_type[xy];
1181 cbp = s->cbp_table[xy];
1183 ctx->use_intra_dc_vlc = s->qscale < ctx->intra_dc_threshold;
1185 if (s->current_picture.qscale_table[xy] != s->qscale)
1186 ff_set_qscale(s, s->current_picture.qscale_table[xy]);
1188 if (s->pict_type == AV_PICTURE_TYPE_P ||
1189 s->pict_type == AV_PICTURE_TYPE_S) {
1191 for (i = 0; i < 4; i++) {
1192 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0];
1193 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1];
1195 s->mb_intra = IS_INTRA(mb_type);
1197 if (IS_SKIP(mb_type)) {
1199 for (i = 0; i < 6; i++)
1200 s->block_last_index[i] = -1;
1201 s->mv_dir = MV_DIR_FORWARD;
1202 s->mv_type = MV_TYPE_16X16;
1203 if (s->pict_type == AV_PICTURE_TYPE_S
1204 && ctx->vol_sprite_usage == GMC_SPRITE) {
1211 } else if (s->mb_intra) {
1212 s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]);
1213 } else if (!s->mb_intra) {
1214 // s->mcsel = 0; // FIXME do we need to init that?
1216 s->mv_dir = MV_DIR_FORWARD;
1217 if (IS_8X8(mb_type)) {
1218 s->mv_type = MV_TYPE_8X8;
1220 s->mv_type = MV_TYPE_16X16;
1223 } else { /* I-Frame */
1225 s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]);
1228 if (!IS_SKIP(mb_type)) {
1230 s->dsp.clear_blocks(s->block[0]);
1231 /* decode each block */
1232 for (i = 0; i < 6; i++) {
1233 if (mpeg4_decode_block(ctx, block[i], i, cbp & 32, s->mb_intra, ctx->rvlc) < 0) {
1234 av_log(s->avctx, AV_LOG_ERROR,
1235 "texture corrupted at %d %d %d\n",
1236 s->mb_x, s->mb_y, s->mb_intra);
1243 /* per-MB end of slice check */
1244 if (--s->mb_num_left <= 0) {
1245 if (mpeg4_is_resync(s))
1250 if (mpeg4_is_resync(s)) {
1251 const int delta = s->mb_x + 1 == s->mb_width ? 2 : 1;
1252 if (s->cbp_table[xy + delta])
1259 static int mpeg4_decode_mb(MpegEncContext *s, int16_t block[6][64])
1261 Mpeg4DecContext *ctx = (Mpeg4DecContext *)s;
1262 int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant;
1264 static int8_t quant_tab[4] = { -1, -2, 1, 2 };
1265 const int xy = s->mb_x + s->mb_y * s->mb_stride;
1267 assert(s->h263_pred);
1269 if (s->pict_type == AV_PICTURE_TYPE_P ||
1270 s->pict_type == AV_PICTURE_TYPE_S) {
1272 if (get_bits1(&s->gb)) {
1275 for (i = 0; i < 6; i++)
1276 s->block_last_index[i] = -1;
1277 s->mv_dir = MV_DIR_FORWARD;
1278 s->mv_type = MV_TYPE_16X16;
1279 if (s->pict_type == AV_PICTURE_TYPE_S &&
1280 ctx->vol_sprite_usage == GMC_SPRITE) {
1281 s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
1286 s->mv[0][0][0] = get_amv(ctx, 0);
1287 s->mv[0][0][1] = get_amv(ctx, 1);
1290 s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
1300 cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
1302 av_log(s->avctx, AV_LOG_ERROR,
1303 "cbpc damaged at %d %d\n", s->mb_x, s->mb_y);
1306 } while (cbpc == 20);
1308 s->dsp.clear_blocks(s->block[0]);
1310 s->mb_intra = ((cbpc & 4) != 0);
1314 if (s->pict_type == AV_PICTURE_TYPE_S &&
1315 ctx->vol_sprite_usage == GMC_SPRITE && (cbpc & 16) == 0)
1316 s->mcsel = get_bits1(&s->gb);
1319 cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1) ^ 0x0F;
1321 cbp = (cbpc & 3) | (cbpy << 2);
1323 ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
1324 if ((!s->progressive_sequence) &&
1325 (cbp || (s->workaround_bugs & FF_BUG_XVID_ILACE)))
1326 s->interlaced_dct = get_bits1(&s->gb);
1328 s->mv_dir = MV_DIR_FORWARD;
1329 if ((cbpc & 16) == 0) {
1331 s->current_picture.mb_type[xy] = MB_TYPE_GMC |
1334 /* 16x16 global motion prediction */
1335 s->mv_type = MV_TYPE_16X16;
1336 mx = get_amv(ctx, 0);
1337 my = get_amv(ctx, 1);
1338 s->mv[0][0][0] = mx;
1339 s->mv[0][0][1] = my;
1340 } else if ((!s->progressive_sequence) && get_bits1(&s->gb)) {
1341 s->current_picture.mb_type[xy] = MB_TYPE_16x8 |
1344 /* 16x8 field motion prediction */
1345 s->mv_type = MV_TYPE_FIELD;
1347 s->field_select[0][0] = get_bits1(&s->gb);
1348 s->field_select[0][1] = get_bits1(&s->gb);
1350 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
1352 for (i = 0; i < 2; i++) {
1353 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
1357 my = ff_h263_decode_motion(s, pred_y / 2, s->f_code);
1361 s->mv[0][i][0] = mx;
1362 s->mv[0][i][1] = my;
1365 s->current_picture.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1366 /* 16x16 motion prediction */
1367 s->mv_type = MV_TYPE_16X16;
1368 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
1369 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
1374 my = ff_h263_decode_motion(s, pred_y, s->f_code);
1378 s->mv[0][0][0] = mx;
1379 s->mv[0][0][1] = my;
1382 s->current_picture.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0;
1383 s->mv_type = MV_TYPE_8X8;
1384 for (i = 0; i < 4; i++) {
1385 mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
1386 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
1390 my = ff_h263_decode_motion(s, pred_y, s->f_code);
1393 s->mv[0][i][0] = mx;
1394 s->mv[0][i][1] = my;
1399 } else if (s->pict_type == AV_PICTURE_TYPE_B) {
1400 int modb1; // first bit of modb
1401 int modb2; // second bit of modb
1404 s->mb_intra = 0; // B-frames never contain intra blocks
1405 s->mcsel = 0; // ... true gmc blocks
1408 for (i = 0; i < 2; i++) {
1409 s->last_mv[i][0][0] =
1410 s->last_mv[i][0][1] =
1411 s->last_mv[i][1][0] =
1412 s->last_mv[i][1][1] = 0;
1415 ff_thread_await_progress(&s->next_picture_ptr->tf, s->mb_y, 0);
1418 /* if we skipped it in the future P Frame than skip it now too */
1419 s->mb_skipped = s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC
1421 if (s->mb_skipped) {
1423 for (i = 0; i < 6; i++)
1424 s->block_last_index[i] = -1;
1426 s->mv_dir = MV_DIR_FORWARD;
1427 s->mv_type = MV_TYPE_16X16;
1432 s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
1438 modb1 = get_bits1(&s->gb);
1440 // like MB_TYPE_B_DIRECT but no vectors coded
1441 mb_type = MB_TYPE_DIRECT2 | MB_TYPE_SKIP | MB_TYPE_L0L1;
1444 modb2 = get_bits1(&s->gb);
1445 mb_type = get_vlc2(&s->gb, mb_type_b_vlc.table, MB_TYPE_B_VLC_BITS, 1);
1447 av_log(s->avctx, AV_LOG_ERROR, "illegal MB_type\n");
1450 mb_type = mb_type_b_map[mb_type];
1454 s->dsp.clear_blocks(s->block[0]);
1455 cbp = get_bits(&s->gb, 6);
1458 if ((!IS_DIRECT(mb_type)) && cbp) {
1459 if (get_bits1(&s->gb))
1460 ff_set_qscale(s, s->qscale + get_bits1(&s->gb) * 4 - 2);
1463 if (!s->progressive_sequence) {
1465 s->interlaced_dct = get_bits1(&s->gb);
1467 if (!IS_DIRECT(mb_type) && get_bits1(&s->gb)) {
1468 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1469 mb_type &= ~MB_TYPE_16x16;
1471 if (USES_LIST(mb_type, 0)) {
1472 s->field_select[0][0] = get_bits1(&s->gb);
1473 s->field_select[0][1] = get_bits1(&s->gb);
1475 if (USES_LIST(mb_type, 1)) {
1476 s->field_select[1][0] = get_bits1(&s->gb);
1477 s->field_select[1][1] = get_bits1(&s->gb);
1483 if ((mb_type & (MB_TYPE_DIRECT2 | MB_TYPE_INTERLACED)) == 0) {
1484 s->mv_type = MV_TYPE_16X16;
1486 if (USES_LIST(mb_type, 0)) {
1487 s->mv_dir = MV_DIR_FORWARD;
1489 mx = ff_h263_decode_motion(s, s->last_mv[0][0][0], s->f_code);
1490 my = ff_h263_decode_motion(s, s->last_mv[0][0][1], s->f_code);
1491 s->last_mv[0][1][0] =
1492 s->last_mv[0][0][0] =
1493 s->mv[0][0][0] = mx;
1494 s->last_mv[0][1][1] =
1495 s->last_mv[0][0][1] =
1496 s->mv[0][0][1] = my;
1499 if (USES_LIST(mb_type, 1)) {
1500 s->mv_dir |= MV_DIR_BACKWARD;
1502 mx = ff_h263_decode_motion(s, s->last_mv[1][0][0], s->b_code);
1503 my = ff_h263_decode_motion(s, s->last_mv[1][0][1], s->b_code);
1504 s->last_mv[1][1][0] =
1505 s->last_mv[1][0][0] =
1506 s->mv[1][0][0] = mx;
1507 s->last_mv[1][1][1] =
1508 s->last_mv[1][0][1] =
1509 s->mv[1][0][1] = my;
1511 } else if (!IS_DIRECT(mb_type)) {
1512 s->mv_type = MV_TYPE_FIELD;
1514 if (USES_LIST(mb_type, 0)) {
1515 s->mv_dir = MV_DIR_FORWARD;
1517 for (i = 0; i < 2; i++) {
1518 mx = ff_h263_decode_motion(s, s->last_mv[0][i][0], s->f_code);
1519 my = ff_h263_decode_motion(s, s->last_mv[0][i][1] / 2, s->f_code);
1520 s->last_mv[0][i][0] =
1521 s->mv[0][i][0] = mx;
1522 s->last_mv[0][i][1] = (s->mv[0][i][1] = my) * 2;
1526 if (USES_LIST(mb_type, 1)) {
1527 s->mv_dir |= MV_DIR_BACKWARD;
1529 for (i = 0; i < 2; i++) {
1530 mx = ff_h263_decode_motion(s, s->last_mv[1][i][0], s->b_code);
1531 my = ff_h263_decode_motion(s, s->last_mv[1][i][1] / 2, s->b_code);
1532 s->last_mv[1][i][0] =
1533 s->mv[1][i][0] = mx;
1534 s->last_mv[1][i][1] = (s->mv[1][i][1] = my) * 2;
1540 if (IS_DIRECT(mb_type)) {
1541 if (IS_SKIP(mb_type)) {
1545 mx = ff_h263_decode_motion(s, 0, 1);
1546 my = ff_h263_decode_motion(s, 0, 1);
1549 s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
1550 mb_type |= ff_mpeg4_set_direct_mv(s, mx, my);
1552 s->current_picture.mb_type[xy] = mb_type;
1553 } else { /* I-Frame */
1555 cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
1557 av_log(s->avctx, AV_LOG_ERROR,
1558 "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y);
1561 } while (cbpc == 8);
1567 s->ac_pred = get_bits1(&s->gb);
1569 s->current_picture.mb_type[xy] = MB_TYPE_INTRA | MB_TYPE_ACPRED;
1571 s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
1573 cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
1575 av_log(s->avctx, AV_LOG_ERROR,
1576 "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y);
1579 cbp = (cbpc & 3) | (cbpy << 2);
1581 ctx->use_intra_dc_vlc = s->qscale < ctx->intra_dc_threshold;
1584 ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
1586 if (!s->progressive_sequence)
1587 s->interlaced_dct = get_bits1(&s->gb);
1589 s->dsp.clear_blocks(s->block[0]);
1590 /* decode each block */
1591 for (i = 0; i < 6; i++) {
1592 if (mpeg4_decode_block(ctx, block[i], i, cbp & 32, 1, 0) < 0)
1599 /* decode each block */
1600 for (i = 0; i < 6; i++) {
1601 if (mpeg4_decode_block(ctx, block[i], i, cbp & 32, 0, 0) < 0)
1607 /* per-MB end of slice check */
1608 if (s->codec_id == AV_CODEC_ID_MPEG4) {
1609 if (mpeg4_is_resync(s)) {
1610 const int delta = s->mb_x + 1 == s->mb_width ? 2 : 1;
1612 if (s->pict_type == AV_PICTURE_TYPE_B &&
1613 s->next_picture.mbskip_table[xy + delta]) {
1614 ff_thread_await_progress(&s->next_picture_ptr->tf,
1615 (s->mb_x + delta >= s->mb_width)
1616 ? FFMIN(s->mb_y + 1, s->mb_height - 1)
1620 if (s->pict_type == AV_PICTURE_TYPE_B &&
1621 s->next_picture.mbskip_table[xy + delta])
1630 static int mpeg4_decode_gop_header(MpegEncContext *s, GetBitContext *gb)
1632 int hours, minutes, seconds;
1633 unsigned time_code = show_bits(gb, 18);
1635 if (time_code & 0x40) { /* marker_bit */
1636 hours = time_code >> 13;
1637 minutes = time_code >> 7 & 0x3f;
1638 seconds = time_code & 0x3f;
1639 s->time_base = seconds + 60 * (minutes + 60 * hours);
1640 skip_bits(gb, 20); /* time_code, closed_gov, broken_link */
1642 av_log(s->avctx, AV_LOG_WARNING, "GOP header missing marker_bit\n");
1648 static int mpeg4_decode_profile_level(MpegEncContext *s, GetBitContext *gb)
1650 int profile_and_level_indication;
1652 profile_and_level_indication = get_bits(gb, 8);
1654 s->avctx->profile = (profile_and_level_indication & 0xf0) >> 4;
1655 s->avctx->level = (profile_and_level_indication & 0x0f);
1657 // for Simple profile, level 0
1658 if (s->avctx->profile == 0 && s->avctx->level == 8) {
1659 s->avctx->level = 0;
1665 static int decode_vol_header(Mpeg4DecContext *ctx, GetBitContext *gb)
1667 MpegEncContext *s = &ctx->m;
1668 int width, height, vo_ver_id;
1671 skip_bits(gb, 1); /* random access */
1672 s->vo_type = get_bits(gb, 8);
1673 if (get_bits1(gb) != 0) { /* is_ol_id */
1674 vo_ver_id = get_bits(gb, 4); /* vo_ver_id */
1675 skip_bits(gb, 3); /* vo_priority */
1679 s->aspect_ratio_info = get_bits(gb, 4);
1680 if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) {
1681 s->avctx->sample_aspect_ratio.num = get_bits(gb, 8); // par_width
1682 s->avctx->sample_aspect_ratio.den = get_bits(gb, 8); // par_height
1684 s->avctx->sample_aspect_ratio = ff_h263_pixel_aspect[s->aspect_ratio_info];
1687 if ((s->vol_control_parameters = get_bits1(gb))) { /* vol control parameter */
1688 int chroma_format = get_bits(gb, 2);
1689 if (chroma_format != CHROMA_420)
1690 av_log(s->avctx, AV_LOG_ERROR, "illegal chroma format\n");
1692 s->low_delay = get_bits1(gb);
1693 if (get_bits1(gb)) { /* vbv parameters */
1694 get_bits(gb, 15); /* first_half_bitrate */
1695 skip_bits1(gb); /* marker */
1696 get_bits(gb, 15); /* latter_half_bitrate */
1697 skip_bits1(gb); /* marker */
1698 get_bits(gb, 15); /* first_half_vbv_buffer_size */
1699 skip_bits1(gb); /* marker */
1700 get_bits(gb, 3); /* latter_half_vbv_buffer_size */
1701 get_bits(gb, 11); /* first_half_vbv_occupancy */
1702 skip_bits1(gb); /* marker */
1703 get_bits(gb, 15); /* latter_half_vbv_occupancy */
1704 skip_bits1(gb); /* marker */
1707 /* is setting low delay flag only once the smartest thing to do?
1708 * low delay detection won't be overriden. */
1709 if (s->picture_number == 0)
1713 ctx->shape = get_bits(gb, 2); /* vol shape */
1714 if (ctx->shape != RECT_SHAPE)
1715 av_log(s->avctx, AV_LOG_ERROR, "only rectangular vol supported\n");
1716 if (ctx->shape == GRAY_SHAPE && vo_ver_id != 1) {
1717 av_log(s->avctx, AV_LOG_ERROR, "Gray shape not supported\n");
1718 skip_bits(gb, 4); /* video_object_layer_shape_extension */
1721 check_marker(gb, "before time_increment_resolution");
1723 s->avctx->time_base.den = get_bits(gb, 16);
1724 if (!s->avctx->time_base.den) {
1725 av_log(s->avctx, AV_LOG_ERROR, "time_base.den==0\n");
1726 s->avctx->time_base.num = 0;
1730 ctx->time_increment_bits = av_log2(s->avctx->time_base.den - 1) + 1;
1731 if (ctx->time_increment_bits < 1)
1732 ctx->time_increment_bits = 1;
1734 check_marker(gb, "before fixed_vop_rate");
1736 if (get_bits1(gb) != 0) /* fixed_vop_rate */
1737 s->avctx->time_base.num = get_bits(gb, ctx->time_increment_bits);
1739 s->avctx->time_base.num = 1;
1743 if (ctx->shape != BIN_ONLY_SHAPE) {
1744 if (ctx->shape == RECT_SHAPE) {
1745 skip_bits1(gb); /* marker */
1746 width = get_bits(gb, 13);
1747 skip_bits1(gb); /* marker */
1748 height = get_bits(gb, 13);
1749 skip_bits1(gb); /* marker */
1750 if (width && height && /* they should be non zero but who knows */
1751 !(s->width && s->codec_tag == AV_RL32("MP4S"))) {
1752 if (s->width && s->height &&
1753 (s->width != width || s->height != height))
1754 s->context_reinit = 1;
1760 s->progressive_sequence =
1761 s->progressive_frame = get_bits1(gb) ^ 1;
1762 s->interlaced_dct = 0;
1763 if (!get_bits1(gb) && (s->avctx->debug & FF_DEBUG_PICT_INFO))
1764 av_log(s->avctx, AV_LOG_INFO, /* OBMC Disable */
1765 "MPEG4 OBMC not supported (very likely buggy encoder)\n");
1767 ctx->vol_sprite_usage = get_bits1(gb); /* vol_sprite_usage */
1769 ctx->vol_sprite_usage = get_bits(gb, 2); /* vol_sprite_usage */
1771 if (ctx->vol_sprite_usage == STATIC_SPRITE)
1772 av_log(s->avctx, AV_LOG_ERROR, "Static Sprites not supported\n");
1773 if (ctx->vol_sprite_usage == STATIC_SPRITE ||
1774 ctx->vol_sprite_usage == GMC_SPRITE) {
1775 if (ctx->vol_sprite_usage == STATIC_SPRITE) {
1776 skip_bits(gb, 13); // sprite_width
1777 skip_bits1(gb); /* marker */
1778 skip_bits(gb, 13); // sprite_height
1779 skip_bits1(gb); /* marker */
1780 skip_bits(gb, 13); // sprite_left
1781 skip_bits1(gb); /* marker */
1782 skip_bits(gb, 13); // sprite_top
1783 skip_bits1(gb); /* marker */
1785 ctx->num_sprite_warping_points = get_bits(gb, 6);
1786 if (ctx->num_sprite_warping_points > 3) {
1787 av_log(s->avctx, AV_LOG_ERROR,
1788 "%d sprite_warping_points\n",
1789 ctx->num_sprite_warping_points);
1790 ctx->num_sprite_warping_points = 0;
1793 s->sprite_warping_accuracy = get_bits(gb, 2);
1794 ctx->sprite_brightness_change = get_bits1(gb);
1795 if (ctx->vol_sprite_usage == STATIC_SPRITE)
1796 skip_bits1(gb); // low_latency_sprite
1798 // FIXME sadct disable bit if verid!=1 && shape not rect
1800 if (get_bits1(gb) == 1) { /* not_8_bit */
1801 s->quant_precision = get_bits(gb, 4); /* quant_precision */
1802 if (get_bits(gb, 4) != 8) /* bits_per_pixel */
1803 av_log(s->avctx, AV_LOG_ERROR, "N-bit not supported\n");
1804 if (s->quant_precision != 5)
1805 av_log(s->avctx, AV_LOG_ERROR,
1806 "quant precision %d\n", s->quant_precision);
1808 s->quant_precision = 5;
1811 // FIXME a bunch of grayscale shape things
1813 if ((s->mpeg_quant = get_bits1(gb))) { /* vol_quant_type */
1816 /* load default matrixes */
1817 for (i = 0; i < 64; i++) {
1818 int j = s->dsp.idct_permutation[i];
1819 v = ff_mpeg4_default_intra_matrix[i];
1820 s->intra_matrix[j] = v;
1821 s->chroma_intra_matrix[j] = v;
1823 v = ff_mpeg4_default_non_intra_matrix[i];
1824 s->inter_matrix[j] = v;
1825 s->chroma_inter_matrix[j] = v;
1828 /* load custom intra matrix */
1829 if (get_bits1(gb)) {
1831 for (i = 0; i < 64; i++) {
1833 v = get_bits(gb, 8);
1838 j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1839 s->intra_matrix[j] = last;
1840 s->chroma_intra_matrix[j] = last;
1843 /* replicate last value */
1844 for (; i < 64; i++) {
1845 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1846 s->intra_matrix[j] = last;
1847 s->chroma_intra_matrix[j] = last;
1851 /* load custom non intra matrix */
1852 if (get_bits1(gb)) {
1854 for (i = 0; i < 64; i++) {
1856 v = get_bits(gb, 8);
1861 j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1862 s->inter_matrix[j] = v;
1863 s->chroma_inter_matrix[j] = v;
1866 /* replicate last value */
1867 for (; i < 64; i++) {
1868 int j = s->dsp.idct_permutation[ff_zigzag_direct[i]];
1869 s->inter_matrix[j] = last;
1870 s->chroma_inter_matrix[j] = last;
1874 // FIXME a bunch of grayscale shape things
1878 s->quarter_sample = get_bits1(gb);
1880 s->quarter_sample = 0;
1882 if (!get_bits1(gb)) {
1883 int pos = get_bits_count(gb);
1884 int estimation_method = get_bits(gb, 2);
1885 if (estimation_method < 2) {
1886 if (!get_bits1(gb)) {
1887 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* opaque */
1888 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* transparent */
1889 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_cae */
1890 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* inter_cae */
1891 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* no_update */
1892 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* upampling */
1894 if (!get_bits1(gb)) {
1895 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_blocks */
1896 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* inter_blocks */
1897 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* inter4v_blocks */
1898 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* not coded blocks */
1900 if (!check_marker(gb, "in complexity estimation part 1")) {
1901 skip_bits_long(gb, pos - get_bits_count(gb));
1904 if (!get_bits1(gb)) {
1905 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* dct_coeffs */
1906 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* dct_lines */
1907 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* vlc_syms */
1908 ctx->cplx_estimation_trash_i += 4 * get_bits1(gb); /* vlc_bits */
1910 if (!get_bits1(gb)) {
1911 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* apm */
1912 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* npm */
1913 ctx->cplx_estimation_trash_b += 8 * get_bits1(gb); /* interpolate_mc_q */
1914 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* forwback_mc_q */
1915 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel2 */
1916 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel4 */
1918 if (!check_marker(gb, "in complexity estimation part 2")) {
1919 skip_bits_long(gb, pos - get_bits_count(gb));
1922 if (estimation_method == 1) {
1923 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* sadct */
1924 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* qpel */
1927 av_log(s->avctx, AV_LOG_ERROR,
1928 "Invalid Complexity estimation method %d\n",
1933 ctx->cplx_estimation_trash_i =
1934 ctx->cplx_estimation_trash_p =
1935 ctx->cplx_estimation_trash_b = 0;
1938 ctx->resync_marker = !get_bits1(gb); /* resync_marker_disabled */
1940 s->data_partitioning = get_bits1(gb);
1941 if (s->data_partitioning)
1942 ctx->rvlc = get_bits1(gb);
1944 if (vo_ver_id != 1) {
1945 ctx->new_pred = get_bits1(gb);
1946 if (ctx->new_pred) {
1947 av_log(s->avctx, AV_LOG_ERROR, "new pred not supported\n");
1948 skip_bits(gb, 2); /* requested upstream message type */
1949 skip_bits1(gb); /* newpred segment type */
1951 if (get_bits1(gb)) // reduced_res_vop
1952 av_log(s->avctx, AV_LOG_ERROR,
1953 "reduced resolution VOP not supported\n");
1958 ctx->scalability = get_bits1(gb);
1960 if (ctx->scalability) {
1961 GetBitContext bak = *gb;
1962 int h_sampling_factor_n;
1963 int h_sampling_factor_m;
1964 int v_sampling_factor_n;
1965 int v_sampling_factor_m;
1967 skip_bits1(gb); // hierarchy_type
1968 skip_bits(gb, 4); /* ref_layer_id */
1969 skip_bits1(gb); /* ref_layer_sampling_dir */
1970 h_sampling_factor_n = get_bits(gb, 5);
1971 h_sampling_factor_m = get_bits(gb, 5);
1972 v_sampling_factor_n = get_bits(gb, 5);
1973 v_sampling_factor_m = get_bits(gb, 5);
1974 ctx->enhancement_type = get_bits1(gb);
1976 if (h_sampling_factor_n == 0 || h_sampling_factor_m == 0 ||
1977 v_sampling_factor_n == 0 || v_sampling_factor_m == 0) {
1978 /* illegal scalability header (VERY broken encoder),
1979 * trying to workaround */
1980 ctx->scalability = 0;
1983 av_log(s->avctx, AV_LOG_ERROR, "scalability not supported\n");
1985 // bin shape stuff FIXME
1993 * Decode the user data stuff in the header.
1994 * Also initializes divx/xvid/lavc_version/build.
1996 static int decode_user_data(Mpeg4DecContext *ctx, GetBitContext *gb)
1998 MpegEncContext *s = &ctx->m;
2002 int ver = 0, build = 0, ver2 = 0, ver3 = 0;
2005 for (i = 0; i < 255 && get_bits_count(gb) < gb->size_in_bits; i++) {
2006 if (show_bits(gb, 23) == 0)
2008 buf[i] = get_bits(gb, 8);
2012 /* divx detection */
2013 e = sscanf(buf, "DivX%dBuild%d%c", &ver, &build, &last);
2015 e = sscanf(buf, "DivX%db%d%c", &ver, &build, &last);
2017 ctx->divx_version = ver;
2018 ctx->divx_build = build;
2019 s->divx_packed = e == 3 && last == 'p';
2020 if (s->divx_packed && !ctx->showed_packed_warning) {
2021 av_log(s->avctx, AV_LOG_WARNING,
2022 "Invalid and inefficient vfw-avi packed B frames detected\n");
2023 ctx->showed_packed_warning = 1;
2027 /* libavcodec detection */
2028 e = sscanf(buf, "FFmpe%*[^b]b%d", &build) + 3;
2030 e = sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build);
2032 e = sscanf(buf, "Lavc%d.%d.%d", &ver, &ver2, &ver3) + 1;
2034 build = (ver << 16) + (ver2 << 8) + ver3;
2037 if (strcmp(buf, "ffmpeg") == 0)
2038 ctx->lavc_build = 4600;
2041 ctx->lavc_build = build;
2043 /* Xvid detection */
2044 e = sscanf(buf, "XviD%d", &build);
2046 ctx->xvid_build = build;
2048 if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1) {
2049 if (s->stream_codec_tag == AV_RL32("XVID") ||
2050 s->codec_tag == AV_RL32("XVID") ||
2051 s->codec_tag == AV_RL32("XVIX") ||
2052 s->codec_tag == AV_RL32("RMP4") ||
2053 s->codec_tag == AV_RL32("ZMP4") ||
2054 s->codec_tag == AV_RL32("SIPP"))
2055 ctx->xvid_build = 0;
2058 if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1)
2059 if (s->codec_tag == AV_RL32("DIVX") && s->vo_type == 0 &&
2060 s->vol_control_parameters == 0)
2061 ctx->divx_version = 400; // divx 4
2063 if (ctx->xvid_build >= 0 && ctx->divx_version >= 0) {
2065 ctx->divx_build = -1;
2069 if (ctx->xvid_build >= 0 &&
2070 s->avctx->idct_algo == FF_IDCT_AUTO &&
2071 (av_get_cpu_flags() & AV_CPU_FLAG_MMX)) {
2072 s->avctx->idct_algo = FF_IDCT_XVIDMMX;
2073 ff_dct_common_init(s);
2080 static int decode_vop_header(Mpeg4DecContext *ctx, GetBitContext *gb)
2082 MpegEncContext *s = &ctx->m;
2083 int time_incr, time_increment;
2085 s->pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* pict type: I = 0 , P = 1 */
2086 if (s->pict_type == AV_PICTURE_TYPE_B && s->low_delay &&
2087 s->vol_control_parameters == 0 && !(s->flags & CODEC_FLAG_LOW_DELAY)) {
2088 av_log(s->avctx, AV_LOG_ERROR, "low_delay flag incorrectly, clearing it\n");
2092 s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B;
2093 if (s->partitioned_frame)
2094 s->decode_mb = mpeg4_decode_partitioned_mb;
2096 s->decode_mb = mpeg4_decode_mb;
2099 while (get_bits1(gb) != 0)
2102 check_marker(gb, "before time_increment");
2104 if (ctx->time_increment_bits == 0 ||
2105 !(show_bits(gb, ctx->time_increment_bits + 1) & 1)) {
2106 av_log(s->avctx, AV_LOG_ERROR,
2107 "hmm, seems the headers are not complete, trying to guess time_increment_bits\n");
2109 for (ctx->time_increment_bits = 1;
2110 ctx->time_increment_bits < 16;
2111 ctx->time_increment_bits++) {
2112 if (s->pict_type == AV_PICTURE_TYPE_P ||
2113 (s->pict_type == AV_PICTURE_TYPE_S &&
2114 ctx->vol_sprite_usage == GMC_SPRITE)) {
2115 if ((show_bits(gb, ctx->time_increment_bits + 6) & 0x37) == 0x30)
2117 } else if ((show_bits(gb, ctx->time_increment_bits + 5) & 0x1F) == 0x18)
2121 av_log(s->avctx, AV_LOG_ERROR,
2122 "my guess is %d bits ;)\n", ctx->time_increment_bits);
2126 time_increment = get_bits1(gb); // FIXME investigate further
2128 time_increment = get_bits(gb, ctx->time_increment_bits);
2130 if (s->pict_type != AV_PICTURE_TYPE_B) {
2131 s->last_time_base = s->time_base;
2132 s->time_base += time_incr;
2133 s->time = s->time_base * s->avctx->time_base.den + time_increment;
2134 if (s->workaround_bugs & FF_BUG_UMP4) {
2135 if (s->time < s->last_non_b_time) {
2136 /* header is not mpeg-4-compatible, broken encoder,
2137 * trying to workaround */
2139 s->time += s->avctx->time_base.den;
2142 s->pp_time = s->time - s->last_non_b_time;
2143 s->last_non_b_time = s->time;
2145 s->time = (s->last_time_base + time_incr) * s->avctx->time_base.den + time_increment;
2146 s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
2147 if (s->pp_time <= s->pb_time ||
2148 s->pp_time <= s->pp_time - s->pb_time ||
2150 /* messed up order, maybe after seeking? skipping current b-frame */
2151 return FRAME_SKIPPED;
2153 ff_mpeg4_init_direct_mv(s);
2155 if (ctx->t_frame == 0)
2156 ctx->t_frame = s->pb_time;
2157 if (ctx->t_frame == 0)
2158 ctx->t_frame = 1; // 1/0 protection
2159 s->pp_field_time = (ROUNDED_DIV(s->last_non_b_time, ctx->t_frame) -
2160 ROUNDED_DIV(s->last_non_b_time - s->pp_time, ctx->t_frame)) * 2;
2161 s->pb_field_time = (ROUNDED_DIV(s->time, ctx->t_frame) -
2162 ROUNDED_DIV(s->last_non_b_time - s->pp_time, ctx->t_frame)) * 2;
2163 if (!s->progressive_sequence) {
2164 if (s->pp_field_time <= s->pb_field_time || s->pb_field_time <= 1)
2165 return FRAME_SKIPPED;
2169 check_marker(gb, "before vop_coded");
2172 if (get_bits1(gb) != 1) {
2173 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2174 av_log(s->avctx, AV_LOG_ERROR, "vop not coded\n");
2175 return FRAME_SKIPPED;
2177 if (ctx->shape != BIN_ONLY_SHAPE &&
2178 (s->pict_type == AV_PICTURE_TYPE_P ||
2179 (s->pict_type == AV_PICTURE_TYPE_S &&
2180 ctx->vol_sprite_usage == GMC_SPRITE))) {
2181 /* rounding type for motion estimation */
2182 s->no_rounding = get_bits1(gb);
2186 // FIXME reduced res stuff
2188 if (ctx->shape != RECT_SHAPE) {
2189 if (ctx->vol_sprite_usage != 1 || s->pict_type != AV_PICTURE_TYPE_I) {
2190 skip_bits(gb, 13); /* width */
2191 skip_bits1(gb); /* marker */
2192 skip_bits(gb, 13); /* height */
2193 skip_bits1(gb); /* marker */
2194 skip_bits(gb, 13); /* hor_spat_ref */
2195 skip_bits1(gb); /* marker */
2196 skip_bits(gb, 13); /* ver_spat_ref */
2198 skip_bits1(gb); /* change_CR_disable */
2200 if (get_bits1(gb) != 0)
2201 skip_bits(gb, 8); /* constant_alpha_value */
2204 // FIXME complexity estimation stuff
2206 if (ctx->shape != BIN_ONLY_SHAPE) {
2207 skip_bits_long(gb, ctx->cplx_estimation_trash_i);
2208 if (s->pict_type != AV_PICTURE_TYPE_I)
2209 skip_bits_long(gb, ctx->cplx_estimation_trash_p);
2210 if (s->pict_type == AV_PICTURE_TYPE_B)
2211 skip_bits_long(gb, ctx->cplx_estimation_trash_b);
2213 ctx->intra_dc_threshold = ff_mpeg4_dc_threshold[get_bits(gb, 3)];
2214 if (!s->progressive_sequence) {
2215 s->top_field_first = get_bits1(gb);
2216 s->alternate_scan = get_bits1(gb);
2218 s->alternate_scan = 0;
2221 if (s->alternate_scan) {
2222 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
2223 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
2224 ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan);
2225 ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
2227 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
2228 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
2229 ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan);
2230 ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
2233 if (s->pict_type == AV_PICTURE_TYPE_S &&
2234 (ctx->vol_sprite_usage == STATIC_SPRITE ||
2235 ctx->vol_sprite_usage == GMC_SPRITE)) {
2236 if (mpeg4_decode_sprite_trajectory(ctx, gb) < 0)
2237 return AVERROR_INVALIDDATA;
2238 if (ctx->sprite_brightness_change)
2239 av_log(s->avctx, AV_LOG_ERROR,
2240 "sprite_brightness_change not supported\n");
2241 if (ctx->vol_sprite_usage == STATIC_SPRITE)
2242 av_log(s->avctx, AV_LOG_ERROR, "static sprite not supported\n");
2245 if (ctx->shape != BIN_ONLY_SHAPE) {
2246 s->chroma_qscale = s->qscale = get_bits(gb, s->quant_precision);
2247 if (s->qscale == 0) {
2248 av_log(s->avctx, AV_LOG_ERROR,
2249 "Error, header damaged or not MPEG4 header (qscale=0)\n");
2250 return -1; // makes no sense to continue, as there is nothing left from the image then
2253 if (s->pict_type != AV_PICTURE_TYPE_I) {
2254 s->f_code = get_bits(gb, 3); /* fcode_for */
2255 if (s->f_code == 0) {
2256 av_log(s->avctx, AV_LOG_ERROR,
2257 "Error, header damaged or not MPEG4 header (f_code=0)\n");
2258 return -1; // makes no sense to continue, as there is nothing left from the image then
2263 if (s->pict_type == AV_PICTURE_TYPE_B) {
2264 s->b_code = get_bits(gb, 3);
2268 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2269 av_log(s->avctx, AV_LOG_DEBUG,
2270 "qp:%d fc:%d,%d %s size:%d pro:%d alt:%d top:%d %spel part:%d resync:%d w:%d a:%d rnd:%d vot:%d%s dc:%d ce:%d/%d/%d\n",
2271 s->qscale, s->f_code, s->b_code,
2272 s->pict_type == AV_PICTURE_TYPE_I ? "I" : (s->pict_type == AV_PICTURE_TYPE_P ? "P" : (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
2273 gb->size_in_bits, s->progressive_sequence, s->alternate_scan,
2274 s->top_field_first, s->quarter_sample ? "q" : "h",
2275 s->data_partitioning, ctx->resync_marker,
2276 ctx->num_sprite_warping_points, s->sprite_warping_accuracy,
2277 1 - s->no_rounding, s->vo_type,
2278 s->vol_control_parameters ? " VOLC" : " ", ctx->intra_dc_threshold,
2279 ctx->cplx_estimation_trash_i, ctx->cplx_estimation_trash_p,
2280 ctx->cplx_estimation_trash_b);
2283 if (!ctx->scalability) {
2284 if (ctx->shape != RECT_SHAPE && s->pict_type != AV_PICTURE_TYPE_I)
2285 skip_bits1(gb); // vop shape coding type
2287 if (ctx->enhancement_type) {
2288 int load_backward_shape = get_bits1(gb);
2289 if (load_backward_shape)
2290 av_log(s->avctx, AV_LOG_ERROR,
2291 "load backward shape isn't supported\n");
2293 skip_bits(gb, 2); // ref_select_code
2296 /* detect buggy encoders which don't set the low_delay flag
2297 * (divx4/xvid/opendivx). Note we cannot detect divx5 without b-frames
2298 * easily (although it's buggy too) */
2299 if (s->vo_type == 0 && s->vol_control_parameters == 0 &&
2300 ctx->divx_version == -1 && s->picture_number == 0) {
2301 av_log(s->avctx, AV_LOG_WARNING,
2302 "looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n");
2306 s->picture_number++; // better than pic number==0 always ;)
2308 // FIXME add short header support
2309 s->y_dc_scale_table = ff_mpeg4_y_dc_scale_table;
2310 s->c_dc_scale_table = ff_mpeg4_c_dc_scale_table;
2312 if (s->workaround_bugs & FF_BUG_EDGE) {
2313 s->h_edge_pos = s->width;
2314 s->v_edge_pos = s->height;
2320 * Decode mpeg4 headers.
2321 * @return <0 if no VOP found (or a damaged one)
2322 * FRAME_SKIPPED if a not coded VOP is found
2323 * 0 if a VOP is found
2325 int ff_mpeg4_decode_picture_header(Mpeg4DecContext *ctx, GetBitContext *gb)
2327 MpegEncContext *s = &ctx->m;
2328 unsigned startcode, v;
2330 /* search next start code */
2333 if (s->codec_tag == AV_RL32("WV1F") && show_bits(gb, 24) == 0x575630) {
2335 if (get_bits(gb, 8) == 0xF0)
2341 if (get_bits_count(gb) >= gb->size_in_bits) {
2342 if (gb->size_in_bits == 8 &&
2343 (ctx->divx_version >= 0 || ctx->xvid_build >= 0)) {
2344 av_log(s->avctx, AV_LOG_WARNING, "frame skip %d\n", gb->size_in_bits);
2345 return FRAME_SKIPPED; // divx bug
2347 return -1; // end of stream
2350 /* use the bits after the test */
2351 v = get_bits(gb, 8);
2352 startcode = ((startcode << 8) | v) & 0xffffffff;
2354 if ((startcode & 0xFFFFFF00) != 0x100)
2355 continue; // no startcode
2357 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
2358 av_log(s->avctx, AV_LOG_DEBUG, "startcode: %3X ", startcode);
2359 if (startcode <= 0x11F)
2360 av_log(s->avctx, AV_LOG_DEBUG, "Video Object Start");
2361 else if (startcode <= 0x12F)
2362 av_log(s->avctx, AV_LOG_DEBUG, "Video Object Layer Start");
2363 else if (startcode <= 0x13F)
2364 av_log(s->avctx, AV_LOG_DEBUG, "Reserved");
2365 else if (startcode <= 0x15F)
2366 av_log(s->avctx, AV_LOG_DEBUG, "FGS bp start");
2367 else if (startcode <= 0x1AF)
2368 av_log(s->avctx, AV_LOG_DEBUG, "Reserved");
2369 else if (startcode == 0x1B0)
2370 av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq Start");
2371 else if (startcode == 0x1B1)
2372 av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq End");
2373 else if (startcode == 0x1B2)
2374 av_log(s->avctx, AV_LOG_DEBUG, "User Data");
2375 else if (startcode == 0x1B3)
2376 av_log(s->avctx, AV_LOG_DEBUG, "Group of VOP start");
2377 else if (startcode == 0x1B4)
2378 av_log(s->avctx, AV_LOG_DEBUG, "Video Session Error");
2379 else if (startcode == 0x1B5)
2380 av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Start");
2381 else if (startcode == 0x1B6)
2382 av_log(s->avctx, AV_LOG_DEBUG, "Video Object Plane start");
2383 else if (startcode == 0x1B7)
2384 av_log(s->avctx, AV_LOG_DEBUG, "slice start");
2385 else if (startcode == 0x1B8)
2386 av_log(s->avctx, AV_LOG_DEBUG, "extension start");
2387 else if (startcode == 0x1B9)
2388 av_log(s->avctx, AV_LOG_DEBUG, "fgs start");
2389 else if (startcode == 0x1BA)
2390 av_log(s->avctx, AV_LOG_DEBUG, "FBA Object start");
2391 else if (startcode == 0x1BB)
2392 av_log(s->avctx, AV_LOG_DEBUG, "FBA Object Plane start");
2393 else if (startcode == 0x1BC)
2394 av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object start");
2395 else if (startcode == 0x1BD)
2396 av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object Plane start");
2397 else if (startcode == 0x1BE)
2398 av_log(s->avctx, AV_LOG_DEBUG, "Still Texture Object start");
2399 else if (startcode == 0x1BF)
2400 av_log(s->avctx, AV_LOG_DEBUG, "Texture Spatial Layer start");
2401 else if (startcode == 0x1C0)
2402 av_log(s->avctx, AV_LOG_DEBUG, "Texture SNR Layer start");
2403 else if (startcode == 0x1C1)
2404 av_log(s->avctx, AV_LOG_DEBUG, "Texture Tile start");
2405 else if (startcode == 0x1C2)
2406 av_log(s->avctx, AV_LOG_DEBUG, "Texture Shape Layer start");
2407 else if (startcode == 0x1C3)
2408 av_log(s->avctx, AV_LOG_DEBUG, "stuffing start");
2409 else if (startcode <= 0x1C5)
2410 av_log(s->avctx, AV_LOG_DEBUG, "reserved");
2411 else if (startcode <= 0x1FF)
2412 av_log(s->avctx, AV_LOG_DEBUG, "System start");
2413 av_log(s->avctx, AV_LOG_DEBUG, " at %d\n", get_bits_count(gb));
2416 if (startcode >= 0x120 && startcode <= 0x12F) {
2417 if (decode_vol_header(ctx, gb) < 0)
2419 } else if (startcode == USER_DATA_STARTCODE) {
2420 decode_user_data(ctx, gb);
2421 } else if (startcode == GOP_STARTCODE) {
2422 mpeg4_decode_gop_header(s, gb);
2423 } else if (startcode == VOS_STARTCODE) {
2424 mpeg4_decode_profile_level(s, gb);
2425 } else if (startcode == VOP_STARTCODE) {
2434 if (s->flags & CODEC_FLAG_LOW_DELAY)
2436 s->avctx->has_b_frames = !s->low_delay;
2438 if (s->workaround_bugs & FF_BUG_AUTODETECT) {
2439 if (s->codec_tag == AV_RL32("XVIX"))
2440 s->workaround_bugs |= FF_BUG_XVID_ILACE;
2442 if (s->codec_tag == AV_RL32("UMP4"))
2443 s->workaround_bugs |= FF_BUG_UMP4;
2445 if (ctx->divx_version >= 500 && ctx->divx_build < 1814)
2446 s->workaround_bugs |= FF_BUG_QPEL_CHROMA;
2448 if (ctx->divx_version > 502 && ctx->divx_build < 1814)
2449 s->workaround_bugs |= FF_BUG_QPEL_CHROMA2;
2451 if (ctx->xvid_build <= 3U)
2452 s->padding_bug_score = 256 * 256 * 256 * 64;
2454 if (ctx->xvid_build <= 1U)
2455 s->workaround_bugs |= FF_BUG_QPEL_CHROMA;
2457 if (ctx->xvid_build <= 12U)
2458 s->workaround_bugs |= FF_BUG_EDGE;
2460 if (ctx->xvid_build <= 32U)
2461 s->workaround_bugs |= FF_BUG_DC_CLIP;
2463 if (ctx->lavc_build < 4653U)
2464 s->workaround_bugs |= FF_BUG_STD_QPEL;
2466 if (ctx->lavc_build < 4655U)
2467 s->workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE;
2469 if (ctx->lavc_build < 4670U)
2470 s->workaround_bugs |= FF_BUG_EDGE;
2472 if (ctx->lavc_build <= 4712U)
2473 s->workaround_bugs |= FF_BUG_DC_CLIP;
2475 if (ctx->divx_version >= 0)
2476 s->workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE;
2478 if (ctx->divx_version == 501 && ctx->divx_build == 20020416)
2479 s->padding_bug_score = 256 * 256 * 256 * 64;
2481 if (ctx->divx_version < 500U)
2482 s->workaround_bugs |= FF_BUG_EDGE;
2484 if (ctx->divx_version >= 0)
2485 s->workaround_bugs |= FF_BUG_HPEL_CHROMA;
2489 if (s->avctx->debug & FF_DEBUG_BUGS)
2490 av_log(s->avctx, AV_LOG_DEBUG,
2491 "bugs: %X lavc_build:%d xvid_build:%d divx_version:%d divx_build:%d %s\n",
2492 s->workaround_bugs, ctx->lavc_build, ctx->xvid_build,
2493 ctx->divx_version, ctx->divx_build, s->divx_packed ? "p" : "");
2495 return decode_vop_header(ctx, gb);
2498 int ff_mpeg4_frame_end(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
2500 Mpeg4DecContext *ctx = avctx->priv_data;
2501 MpegEncContext *s = &ctx->m;
2503 /* divx 5.01+ bistream reorder stuff */
2504 if (s->divx_packed) {
2505 int current_pos = get_bits_count(&s->gb) >> 3;
2506 int startcode_found = 0;
2508 if (buf_size - current_pos > 5) {
2510 for (i = current_pos; i < buf_size - 3; i++)
2514 buf[i + 3] == 0xB6) {
2515 startcode_found = 1;
2519 if (s->gb.buffer == s->bitstream_buffer && buf_size > 7 &&
2520 ctx->xvid_build >= 0) { // xvid style
2521 startcode_found = 1;
2525 if (startcode_found) {
2526 av_fast_malloc(&s->bitstream_buffer,
2527 &s->allocated_bitstream_buffer_size,
2528 buf_size - current_pos +
2529 FF_INPUT_BUFFER_PADDING_SIZE);
2530 if (!s->bitstream_buffer)
2531 return AVERROR(ENOMEM);
2532 memcpy(s->bitstream_buffer, buf + current_pos,
2533 buf_size - current_pos);
2534 s->bitstream_buffer_size = buf_size - current_pos;
2541 static int mpeg4_update_thread_context(AVCodecContext *dst,
2542 const AVCodecContext *src)
2544 Mpeg4DecContext *s = dst->priv_data;
2545 const Mpeg4DecContext *s1 = src->priv_data;
2547 int ret = ff_mpeg_update_thread_context(dst, src);
2552 s->shape = s1->shape;
2553 s->time_increment_bits = s1->time_increment_bits;
2558 static av_cold int decode_init(AVCodecContext *avctx)
2560 Mpeg4DecContext *ctx = avctx->priv_data;
2561 MpegEncContext *s = &ctx->m;
2563 static int done = 0;
2568 ctx->lavc_build = -1;
2570 if ((ret = ff_h263_decode_init(avctx)) < 0)
2576 ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
2577 ff_init_rl(&ff_rvlc_rl_inter, ff_mpeg4_static_rl_table_store[1]);
2578 ff_init_rl(&ff_rvlc_rl_intra, ff_mpeg4_static_rl_table_store[2]);
2579 INIT_VLC_RL(ff_mpeg4_rl_intra, 554);
2580 INIT_VLC_RL(ff_rvlc_rl_inter, 1072);
2581 INIT_VLC_RL(ff_rvlc_rl_intra, 1072);
2582 INIT_VLC_STATIC(&dc_lum, DC_VLC_BITS, 10 /* 13 */,
2583 &ff_mpeg4_DCtab_lum[0][1], 2, 1,
2584 &ff_mpeg4_DCtab_lum[0][0], 2, 1, 512);
2585 INIT_VLC_STATIC(&dc_chrom, DC_VLC_BITS, 10 /* 13 */,
2586 &ff_mpeg4_DCtab_chrom[0][1], 2, 1,
2587 &ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512);
2588 INIT_VLC_STATIC(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15,
2589 &ff_sprite_trajectory_tab[0][1], 4, 2,
2590 &ff_sprite_trajectory_tab[0][0], 4, 2, 128);
2591 INIT_VLC_STATIC(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4,
2592 &ff_mb_type_b_tab[0][1], 2, 1,
2593 &ff_mb_type_b_tab[0][0], 2, 1, 16);
2597 s->low_delay = 0; /* default, might be overriden in the vol header during header parsing */
2598 s->decode_mb = mpeg4_decode_mb;
2599 ctx->time_increment_bits = 4; /* default value for broken headers */
2601 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
2602 avctx->internal->allocate_progress = 1;
2607 static const AVProfile mpeg4_video_profiles[] = {
2608 { FF_PROFILE_MPEG4_SIMPLE, "Simple Profile" },
2609 { FF_PROFILE_MPEG4_SIMPLE_SCALABLE, "Simple Scalable Profile" },
2610 { FF_PROFILE_MPEG4_CORE, "Core Profile" },
2611 { FF_PROFILE_MPEG4_MAIN, "Main Profile" },
2612 { FF_PROFILE_MPEG4_N_BIT, "N-bit Profile" },
2613 { FF_PROFILE_MPEG4_SCALABLE_TEXTURE, "Scalable Texture Profile" },
2614 { FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION, "Simple Face Animation Profile" },
2615 { FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE, "Basic Animated Texture Profile" },
2616 { FF_PROFILE_MPEG4_HYBRID, "Hybrid Profile" },
2617 { FF_PROFILE_MPEG4_ADVANCED_REAL_TIME, "Advanced Real Time Simple Profile" },
2618 { FF_PROFILE_MPEG4_CORE_SCALABLE, "Code Scalable Profile" },
2619 { FF_PROFILE_MPEG4_ADVANCED_CODING, "Advanced Coding Profile" },
2620 { FF_PROFILE_MPEG4_ADVANCED_CORE, "Advanced Core Profile" },
2621 { FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE, "Advanced Scalable Texture Profile" },
2622 { FF_PROFILE_MPEG4_SIMPLE_STUDIO, "Simple Studio Profile" },
2623 { FF_PROFILE_MPEG4_ADVANCED_SIMPLE, "Advanced Simple Profile" },
2626 AVCodec ff_mpeg4_decoder = {
2628 .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
2629 .type = AVMEDIA_TYPE_VIDEO,
2630 .id = AV_CODEC_ID_MPEG4,
2631 .priv_data_size = sizeof(Mpeg4DecContext),
2632 .init = decode_init,
2633 .close = ff_h263_decode_end,
2634 .decode = ff_h263_decode_frame,
2635 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2636 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2637 CODEC_CAP_FRAME_THREADS,
2638 .flush = ff_mpeg_flush,
2639 .pix_fmts = ff_h263_hwaccel_pixfmt_list_420,
2640 .profiles = NULL_IF_CONFIG_SMALL(mpeg4_video_profiles),
2641 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg4_update_thread_context),