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"
26 #include "mpegutils.h"
27 #include "mpegvideo.h"
28 #include "mpegvideodata.h"
29 #include "mpeg4video.h"
34 /* The defines below define the number of bits that are read at once for
35 * reading vlc values. Changing these may improve speed and data cache needs
36 * be aware though that decreasing them may need the number of stages that is
37 * passed to get_vlc* to be increased. */
38 #define SPRITE_TRAJ_VLC_BITS 6
40 #define MB_TYPE_B_VLC_BITS 4
42 static VLC dc_lum, dc_chrom;
43 static VLC sprite_trajectory;
44 static VLC mb_type_b_vlc;
46 static const int mb_type_b_map[4] = {
47 MB_TYPE_DIRECT2 | MB_TYPE_L0L1,
48 MB_TYPE_L0L1 | MB_TYPE_16x16,
49 MB_TYPE_L1 | MB_TYPE_16x16,
50 MB_TYPE_L0 | MB_TYPE_16x16,
55 * @param n block index (0-3 are luma, 4-5 are chroma)
56 * @param dir the ac prediction direction
58 void ff_mpeg4_pred_ac(MpegEncContext *s, int16_t *block, int n, int dir)
61 int16_t *ac_val, *ac_val1;
62 int8_t *const qscale_table = s->current_picture.qscale_table;
65 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
69 const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride;
73 if (s->mb_x == 0 || s->qscale == qscale_table[xy] ||
76 for (i = 1; i < 8; i++)
77 block[s->idsp.idct_permutation[i << 3]] += ac_val[i];
79 /* different qscale, we must rescale */
80 for (i = 1; i < 8; i++)
81 block[s->idsp.idct_permutation[i << 3]] += ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale);
84 const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride;
86 ac_val -= 16 * s->block_wrap[n];
88 if (s->mb_y == 0 || s->qscale == qscale_table[xy] ||
91 for (i = 1; i < 8; i++)
92 block[s->idsp.idct_permutation[i]] += ac_val[i + 8];
94 /* different qscale, we must rescale */
95 for (i = 1; i < 8; i++)
96 block[s->idsp.idct_permutation[i]] += ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale);
101 for (i = 1; i < 8; i++)
102 ac_val1[i] = block[s->idsp.idct_permutation[i << 3]];
105 for (i = 1; i < 8; i++)
106 ac_val1[8 + i] = block[s->idsp.idct_permutation[i]];
110 * check if the next stuff is a resync marker or the end.
113 static inline int mpeg4_is_resync(MpegEncContext *s)
115 int bits_count = get_bits_count(&s->gb);
116 int v = show_bits(&s->gb, 16);
118 if (s->workaround_bugs & FF_BUG_NO_PADDING)
122 if (s->pict_type == AV_PICTURE_TYPE_B ||
123 (v >> (8 - s->pict_type) != 1) || s->partitioned_frame)
125 skip_bits(&s->gb, 8 + s->pict_type);
126 bits_count += 8 + s->pict_type;
127 v = show_bits(&s->gb, 16);
130 if (bits_count + 8 >= s->gb.size_in_bits) {
132 v |= 0x7F >> (7 - (bits_count & 7));
137 if (v == ff_mpeg4_resync_prefix[bits_count & 7]) {
139 GetBitContext gb = s->gb;
141 skip_bits(&s->gb, 1);
142 align_get_bits(&s->gb);
144 for (len = 0; len < 32; len++)
145 if (get_bits1(&s->gb))
150 if (len >= ff_mpeg4_get_video_packet_prefix_length(s))
157 static int mpeg4_decode_sprite_trajectory(Mpeg4DecContext *ctx, GetBitContext *gb)
159 MpegEncContext *s = &ctx->m;
160 int a = 2 << s->sprite_warping_accuracy;
161 int rho = 3 - s->sprite_warping_accuracy;
167 int min_ab, i, w2, h2, w3, h3;
168 int sprite_ref[4][2];
169 int virtual_ref[2][2];
171 // only true for rectangle shapes
172 const int vop_ref[4][2] = { { 0, 0 }, { s->width, 0 },
173 { 0, s->height }, { s->width, s->height } };
174 int d[4][2] = { { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 } };
176 if (w <= 0 || h <= 0)
177 return AVERROR_INVALIDDATA;
179 for (i = 0; i < ctx->num_sprite_warping_points; i++) {
183 length = get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3);
185 x = get_xbits(gb, length);
187 if (!(ctx->divx_version == 500 && ctx->divx_build == 413))
188 skip_bits1(gb); /* marker bit */
190 length = get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3);
192 y = get_xbits(gb, length);
194 skip_bits1(gb); /* marker bit */
195 ctx->sprite_traj[i][0] = d[i][0] = x;
196 ctx->sprite_traj[i][1] = d[i][1] = y;
199 ctx->sprite_traj[i][0] = ctx->sprite_traj[i][1] = 0;
201 while ((1 << alpha) < w)
203 while ((1 << beta) < h)
204 beta++; /* typo in the mpeg4 std for the definition of w' and h' */
208 // Note, the 4th point isn't used for GMC
209 if (ctx->divx_version == 500 && ctx->divx_build == 413) {
210 sprite_ref[0][0] = a * vop_ref[0][0] + d[0][0];
211 sprite_ref[0][1] = a * vop_ref[0][1] + d[0][1];
212 sprite_ref[1][0] = a * vop_ref[1][0] + d[0][0] + d[1][0];
213 sprite_ref[1][1] = a * vop_ref[1][1] + d[0][1] + d[1][1];
214 sprite_ref[2][0] = a * vop_ref[2][0] + d[0][0] + d[2][0];
215 sprite_ref[2][1] = a * vop_ref[2][1] + d[0][1] + d[2][1];
217 sprite_ref[0][0] = (a >> 1) * (2 * vop_ref[0][0] + d[0][0]);
218 sprite_ref[0][1] = (a >> 1) * (2 * vop_ref[0][1] + d[0][1]);
219 sprite_ref[1][0] = (a >> 1) * (2 * vop_ref[1][0] + d[0][0] + d[1][0]);
220 sprite_ref[1][1] = (a >> 1) * (2 * vop_ref[1][1] + d[0][1] + d[1][1]);
221 sprite_ref[2][0] = (a >> 1) * (2 * vop_ref[2][0] + d[0][0] + d[2][0]);
222 sprite_ref[2][1] = (a >> 1) * (2 * vop_ref[2][1] + d[0][1] + d[2][1]);
224 /* sprite_ref[3][0] = (a >> 1) * (2 * vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]);
225 * sprite_ref[3][1] = (a >> 1) * (2 * vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */
227 /* this is mostly identical to the mpeg4 std (and is totally unreadable
228 * because of that...). Perhaps it should be reordered to be more readable.
229 * The idea behind this virtual_ref mess is to be able to use shifts later
230 * per pixel instead of divides so the distance between points is converted
231 * from w&h based to w2&h2 based which are of the 2^x form. */
232 virtual_ref[0][0] = 16 * (vop_ref[0][0] + w2) +
233 ROUNDED_DIV(((w - w2) *
234 (r * sprite_ref[0][0] - 16 * vop_ref[0][0]) +
235 w2 * (r * sprite_ref[1][0] - 16 * vop_ref[1][0])), w);
236 virtual_ref[0][1] = 16 * vop_ref[0][1] +
237 ROUNDED_DIV(((w - w2) *
238 (r * sprite_ref[0][1] - 16 * vop_ref[0][1]) +
239 w2 * (r * sprite_ref[1][1] - 16 * vop_ref[1][1])), w);
240 virtual_ref[1][0] = 16 * vop_ref[0][0] +
241 ROUNDED_DIV(((h - h2) * (r * sprite_ref[0][0] - 16 * vop_ref[0][0]) +
242 h2 * (r * sprite_ref[2][0] - 16 * vop_ref[2][0])), h);
243 virtual_ref[1][1] = 16 * (vop_ref[0][1] + h2) +
244 ROUNDED_DIV(((h - h2) * (r * sprite_ref[0][1] - 16 * vop_ref[0][1]) +
245 h2 * (r * sprite_ref[2][1] - 16 * vop_ref[2][1])), h);
247 switch (ctx->num_sprite_warping_points) {
249 s->sprite_offset[0][0] =
250 s->sprite_offset[0][1] =
251 s->sprite_offset[1][0] =
252 s->sprite_offset[1][1] = 0;
253 s->sprite_delta[0][0] = a;
254 s->sprite_delta[0][1] =
255 s->sprite_delta[1][0] = 0;
256 s->sprite_delta[1][1] = a;
257 ctx->sprite_shift[0] =
258 ctx->sprite_shift[1] = 0;
261 s->sprite_offset[0][0] = sprite_ref[0][0] - a * vop_ref[0][0];
262 s->sprite_offset[0][1] = sprite_ref[0][1] - a * vop_ref[0][1];
263 s->sprite_offset[1][0] = ((sprite_ref[0][0] >> 1) | (sprite_ref[0][0] & 1)) -
264 a * (vop_ref[0][0] / 2);
265 s->sprite_offset[1][1] = ((sprite_ref[0][1] >> 1) | (sprite_ref[0][1] & 1)) -
266 a * (vop_ref[0][1] / 2);
267 s->sprite_delta[0][0] = a;
268 s->sprite_delta[0][1] =
269 s->sprite_delta[1][0] = 0;
270 s->sprite_delta[1][1] = a;
271 ctx->sprite_shift[0] =
272 ctx->sprite_shift[1] = 0;
275 s->sprite_offset[0][0] = (sprite_ref[0][0] << (alpha + rho)) +
276 (-r * sprite_ref[0][0] + virtual_ref[0][0]) *
278 (r * sprite_ref[0][1] - virtual_ref[0][1]) *
279 (-vop_ref[0][1]) + (1 << (alpha + rho - 1));
280 s->sprite_offset[0][1] = (sprite_ref[0][1] << (alpha + rho)) +
281 (-r * sprite_ref[0][1] + virtual_ref[0][1]) *
283 (-r * sprite_ref[0][0] + virtual_ref[0][0]) *
284 (-vop_ref[0][1]) + (1 << (alpha + rho - 1));
285 s->sprite_offset[1][0] = ((-r * sprite_ref[0][0] + virtual_ref[0][0]) *
286 (-2 * vop_ref[0][0] + 1) +
287 (r * sprite_ref[0][1] - virtual_ref[0][1]) *
288 (-2 * vop_ref[0][1] + 1) + 2 * w2 * r *
289 sprite_ref[0][0] - 16 * w2 + (1 << (alpha + rho + 1)));
290 s->sprite_offset[1][1] = ((-r * sprite_ref[0][1] + virtual_ref[0][1]) *
291 (-2 * vop_ref[0][0] + 1) +
292 (-r * sprite_ref[0][0] + virtual_ref[0][0]) *
293 (-2 * vop_ref[0][1] + 1) + 2 * w2 * r *
294 sprite_ref[0][1] - 16 * w2 + (1 << (alpha + rho + 1)));
295 s->sprite_delta[0][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]);
296 s->sprite_delta[0][1] = (+r * sprite_ref[0][1] - virtual_ref[0][1]);
297 s->sprite_delta[1][0] = (-r * sprite_ref[0][1] + virtual_ref[0][1]);
298 s->sprite_delta[1][1] = (-r * sprite_ref[0][0] + virtual_ref[0][0]);
300 ctx->sprite_shift[0] = alpha + rho;
301 ctx->sprite_shift[1] = alpha + rho + 2;
304 min_ab = FFMIN(alpha, beta);
307 s->sprite_offset[0][0] = (sprite_ref[0][0] << (alpha + beta + rho - min_ab)) +
308 (-r * sprite_ref[0][0] + virtual_ref[0][0]) *
309 h3 * (-vop_ref[0][0]) +
310 (-r * sprite_ref[0][0] + virtual_ref[1][0]) *
311 w3 * (-vop_ref[0][1]) +
312 (1 << (alpha + beta + rho - min_ab - 1));
313 s->sprite_offset[0][1] = (sprite_ref[0][1] << (alpha + beta + rho - min_ab)) +
314 (-r * sprite_ref[0][1] + virtual_ref[0][1]) *
315 h3 * (-vop_ref[0][0]) +
316 (-r * sprite_ref[0][1] + virtual_ref[1][1]) *
317 w3 * (-vop_ref[0][1]) +
318 (1 << (alpha + beta + rho - min_ab - 1));
319 s->sprite_offset[1][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]) *
320 h3 * (-2 * vop_ref[0][0] + 1) +
321 (-r * sprite_ref[0][0] + virtual_ref[1][0]) *
322 w3 * (-2 * vop_ref[0][1] + 1) + 2 * w2 * h3 *
323 r * sprite_ref[0][0] - 16 * w2 * h3 +
324 (1 << (alpha + beta + rho - min_ab + 1));
325 s->sprite_offset[1][1] = (-r * sprite_ref[0][1] + virtual_ref[0][1]) *
326 h3 * (-2 * vop_ref[0][0] + 1) +
327 (-r * sprite_ref[0][1] + virtual_ref[1][1]) *
328 w3 * (-2 * vop_ref[0][1] + 1) + 2 * w2 * h3 *
329 r * sprite_ref[0][1] - 16 * w2 * h3 +
330 (1 << (alpha + beta + rho - min_ab + 1));
331 s->sprite_delta[0][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]) * h3;
332 s->sprite_delta[0][1] = (-r * sprite_ref[0][0] + virtual_ref[1][0]) * w3;
333 s->sprite_delta[1][0] = (-r * sprite_ref[0][1] + virtual_ref[0][1]) * h3;
334 s->sprite_delta[1][1] = (-r * sprite_ref[0][1] + virtual_ref[1][1]) * w3;
336 ctx->sprite_shift[0] = alpha + beta + rho - min_ab;
337 ctx->sprite_shift[1] = alpha + beta + rho - min_ab + 2;
340 /* try to simplify the situation */
341 if (s->sprite_delta[0][0] == a << ctx->sprite_shift[0] &&
342 s->sprite_delta[0][1] == 0 &&
343 s->sprite_delta[1][0] == 0 &&
344 s->sprite_delta[1][1] == a << ctx->sprite_shift[0]) {
345 s->sprite_offset[0][0] >>= ctx->sprite_shift[0];
346 s->sprite_offset[0][1] >>= ctx->sprite_shift[0];
347 s->sprite_offset[1][0] >>= ctx->sprite_shift[1];
348 s->sprite_offset[1][1] >>= ctx->sprite_shift[1];
349 s->sprite_delta[0][0] = a;
350 s->sprite_delta[0][1] = 0;
351 s->sprite_delta[1][0] = 0;
352 s->sprite_delta[1][1] = a;
353 ctx->sprite_shift[0] = 0;
354 ctx->sprite_shift[1] = 0;
355 s->real_sprite_warping_points = 1;
357 int shift_y = 16 - ctx->sprite_shift[0];
358 int shift_c = 16 - ctx->sprite_shift[1];
359 for (i = 0; i < 2; i++) {
360 s->sprite_offset[0][i] <<= shift_y;
361 s->sprite_offset[1][i] <<= shift_c;
362 s->sprite_delta[0][i] <<= shift_y;
363 s->sprite_delta[1][i] <<= shift_y;
364 ctx->sprite_shift[i] = 16;
366 s->real_sprite_warping_points = ctx->num_sprite_warping_points;
373 * Decode the next video packet.
374 * @return <0 if something went wrong
376 int ff_mpeg4_decode_video_packet_header(Mpeg4DecContext *ctx)
378 MpegEncContext *s = &ctx->m;
380 int mb_num_bits = av_log2(s->mb_num - 1) + 1;
381 int header_extension = 0, mb_num, len;
383 /* is there enough space left for a video packet + header */
384 if (get_bits_count(&s->gb) > s->gb.size_in_bits - 20)
387 for (len = 0; len < 32; len++)
388 if (get_bits1(&s->gb))
391 if (len != ff_mpeg4_get_video_packet_prefix_length(s)) {
392 av_log(s->avctx, AV_LOG_ERROR, "marker does not match f_code\n");
396 if (ctx->shape != RECT_SHAPE) {
397 header_extension = get_bits1(&s->gb);
398 // FIXME more stuff here
401 mb_num = get_bits(&s->gb, mb_num_bits);
402 if (mb_num >= s->mb_num) {
403 av_log(s->avctx, AV_LOG_ERROR,
404 "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num);
407 if (s->pict_type == AV_PICTURE_TYPE_B) {
408 int mb_x = 0, mb_y = 0;
410 while (s->next_picture.mbskip_table[s->mb_index2xy[mb_num]]) {
412 ff_thread_await_progress(&s->next_picture_ptr->tf, mb_y++, 0);
414 if (++mb_x == s->mb_width)
417 if (mb_num >= s->mb_num)
418 return -1; // slice contains just skipped MBs (already decoded)
421 s->mb_x = mb_num % s->mb_width;
422 s->mb_y = mb_num / s->mb_width;
424 if (ctx->shape != BIN_ONLY_SHAPE) {
425 int qscale = get_bits(&s->gb, s->quant_precision);
427 s->chroma_qscale = s->qscale = qscale;
430 if (ctx->shape == RECT_SHAPE)
431 header_extension = get_bits1(&s->gb);
433 if (header_extension) {
436 while (get_bits1(&s->gb) != 0)
439 check_marker(&s->gb, "before time_increment in video packed header");
440 skip_bits(&s->gb, ctx->time_increment_bits); /* time_increment */
441 check_marker(&s->gb, "before vop_coding_type in video packed header");
443 skip_bits(&s->gb, 2); /* vop coding type */
444 // FIXME not rect stuff here
446 if (ctx->shape != BIN_ONLY_SHAPE) {
447 skip_bits(&s->gb, 3); /* intra dc vlc threshold */
448 // FIXME don't just ignore everything
449 if (s->pict_type == AV_PICTURE_TYPE_S &&
450 ctx->vol_sprite_usage == GMC_SPRITE) {
451 if (mpeg4_decode_sprite_trajectory(ctx, &s->gb) < 0)
452 return AVERROR_INVALIDDATA;
453 av_log(s->avctx, AV_LOG_ERROR, "untested\n");
456 // FIXME reduced res stuff here
458 if (s->pict_type != AV_PICTURE_TYPE_I) {
459 int f_code = get_bits(&s->gb, 3); /* fcode_for */
461 av_log(s->avctx, AV_LOG_ERROR,
462 "Error, video packet header damaged (f_code=0)\n");
464 if (s->pict_type == AV_PICTURE_TYPE_B) {
465 int b_code = get_bits(&s->gb, 3);
467 av_log(s->avctx, AV_LOG_ERROR,
468 "Error, video packet header damaged (b_code=0)\n");
472 // FIXME new-pred stuff
478 * Get the average motion vector for a GMC MB.
479 * @param n either 0 for the x component or 1 for y
480 * @return the average MV for a GMC MB
482 static inline int get_amv(Mpeg4DecContext *ctx, int n)
484 MpegEncContext *s = &ctx->m;
485 int x, y, mb_v, sum, dx, dy, shift;
486 int len = 1 << (s->f_code + 4);
487 const int a = s->sprite_warping_accuracy;
489 if (s->workaround_bugs & FF_BUG_AMV)
490 len >>= s->quarter_sample;
492 if (s->real_sprite_warping_points == 1) {
493 if (ctx->divx_version == 500 && ctx->divx_build == 413)
494 sum = s->sprite_offset[0][n] / (1 << (a - s->quarter_sample));
496 sum = RSHIFT(s->sprite_offset[0][n] << s->quarter_sample, a);
498 dx = s->sprite_delta[n][0];
499 dy = s->sprite_delta[n][1];
500 shift = ctx->sprite_shift[0];
502 dy -= 1 << (shift + a + 1);
504 dx -= 1 << (shift + a + 1);
505 mb_v = s->sprite_offset[0][n] + dx * s->mb_x * 16 + dy * s->mb_y * 16;
508 for (y = 0; y < 16; y++) {
513 for (x = 0; x < 16; x++) {
518 sum = RSHIFT(sum, a + 8 - s->quarter_sample);
530 * Decode the dc value.
531 * @param n block index (0-3 are luma, 4-5 are chroma)
532 * @param dir_ptr the prediction direction will be stored here
533 * @return the quantized dc
535 static inline int mpeg4_decode_dc(MpegEncContext *s, int n, int *dir_ptr)
540 code = get_vlc2(&s->gb, dc_lum.table, DC_VLC_BITS, 1);
542 code = get_vlc2(&s->gb, dc_chrom.table, DC_VLC_BITS, 1);
544 if (code < 0 || code > 9 /* && s->nbit < 9 */) {
545 av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n");
554 level = 2 * get_bits1(&s->gb) - 1;
556 if (get_bits1(&s->gb))
557 level = get_bits(&s->gb, code - 1) + (1 << (code - 1));
559 level = -get_bits(&s->gb, code - 1) - (1 << (code - 1));
562 level = get_xbits(&s->gb, code);
566 if (get_bits1(&s->gb) == 0) { /* marker */
567 if (s->avctx->err_recognition & AV_EF_BITSTREAM) {
568 av_log(s->avctx, AV_LOG_ERROR, "dc marker bit missing\n");
575 return ff_mpeg4_pred_dc(s, n, level, dir_ptr, 0);
579 * Decode first partition.
580 * @return number of MBs decoded or <0 if an error occurred
582 static int mpeg4_decode_partition_a(Mpeg4DecContext *ctx)
584 MpegEncContext *s = &ctx->m;
586 static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
588 /* decode first partition */
589 s->first_slice_line = 1;
590 for (; s->mb_y < s->mb_height; s->mb_y++) {
591 ff_init_block_index(s);
592 for (; s->mb_x < s->mb_width; s->mb_x++) {
593 const int xy = s->mb_x + s->mb_y * s->mb_stride;
598 ff_update_block_index(s);
599 if (s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y + 1)
600 s->first_slice_line = 0;
602 if (s->pict_type == AV_PICTURE_TYPE_I) {
606 if (show_bits_long(&s->gb, 19) == DC_MARKER)
609 cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
611 av_log(s->avctx, AV_LOG_ERROR,
612 "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
617 s->cbp_table[xy] = cbpc & 3;
618 s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
622 ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
624 s->current_picture.qscale_table[xy] = s->qscale;
626 s->mbintra_table[xy] = 1;
627 for (i = 0; i < 6; i++) {
629 int dc = mpeg4_decode_dc(s, i, &dc_pred_dir);
631 av_log(s->avctx, AV_LOG_ERROR,
632 "DC corrupted at %d %d\n", s->mb_x, s->mb_y);
639 s->pred_dir_table[xy] = dir;
640 } else { /* P/S_TYPE */
641 int mx, my, pred_x, pred_y, bits;
642 int16_t *const mot_val = s->current_picture.motion_val[0][s->block_index[0]];
643 const int stride = s->b8_stride * 2;
646 bits = show_bits(&s->gb, 17);
647 if (bits == MOTION_MARKER)
651 if (bits & 0x10000) {
653 if (s->pict_type == AV_PICTURE_TYPE_S &&
654 ctx->vol_sprite_usage == GMC_SPRITE) {
655 s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
659 mx = get_amv(ctx, 0);
660 my = get_amv(ctx, 1);
662 s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
669 mot_val[0 + stride] =
670 mot_val[2 + stride] = mx;
673 mot_val[1 + stride] =
674 mot_val[3 + stride] = my;
676 if (s->mbintra_table[xy])
677 ff_clean_intra_table_entries(s);
681 cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
683 av_log(s->avctx, AV_LOG_ERROR,
684 "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
690 s->cbp_table[xy] = cbpc & (8 + 3); // 8 is dquant
692 s->mb_intra = ((cbpc & 4) != 0);
695 s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
696 s->mbintra_table[xy] = 1;
699 mot_val[0 + stride] =
700 mot_val[2 + stride] = 0;
703 mot_val[1 + stride] =
704 mot_val[3 + stride] = 0;
706 if (s->mbintra_table[xy])
707 ff_clean_intra_table_entries(s);
709 if (s->pict_type == AV_PICTURE_TYPE_S &&
710 ctx->vol_sprite_usage == GMC_SPRITE &&
712 s->mcsel = get_bits1(&s->gb);
716 if ((cbpc & 16) == 0) {
717 /* 16x16 motion prediction */
719 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
721 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
725 my = ff_h263_decode_motion(s, pred_y, s->f_code);
728 s->current_picture.mb_type[xy] = MB_TYPE_16x16 |
731 mx = get_amv(ctx, 0);
732 my = get_amv(ctx, 1);
733 s->current_picture.mb_type[xy] = MB_TYPE_16x16 |
740 mot_val[0 + stride] =
741 mot_val[2 + stride] = mx;
744 mot_val[1 + stride] =
745 mot_val[3 + stride] = my;
748 s->current_picture.mb_type[xy] = MB_TYPE_8x8 |
750 for (i = 0; i < 4; i++) {
751 int16_t *mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
752 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
756 my = ff_h263_decode_motion(s, pred_y, s->f_code);
773 * decode second partition.
774 * @return <0 if an error occurred
776 static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count)
779 static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
781 s->mb_x = s->resync_mb_x;
782 s->first_slice_line = 1;
783 for (s->mb_y = s->resync_mb_y; mb_num < mb_count; s->mb_y++) {
784 ff_init_block_index(s);
785 for (; mb_num < mb_count && s->mb_x < s->mb_width; s->mb_x++) {
786 const int xy = s->mb_x + s->mb_y * s->mb_stride;
789 ff_update_block_index(s);
790 if (s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y + 1)
791 s->first_slice_line = 0;
793 if (s->pict_type == AV_PICTURE_TYPE_I) {
794 int ac_pred = get_bits1(&s->gb);
795 int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
797 av_log(s->avctx, AV_LOG_ERROR,
798 "cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
802 s->cbp_table[xy] |= cbpy << 2;
803 s->current_picture.mb_type[xy] |= ac_pred * MB_TYPE_ACPRED;
804 } else { /* P || S_TYPE */
805 if (IS_INTRA(s->current_picture.mb_type[xy])) {
808 int ac_pred = get_bits1(&s->gb);
809 int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
812 av_log(s->avctx, AV_LOG_ERROR,
813 "I cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
817 if (s->cbp_table[xy] & 8)
818 ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
819 s->current_picture.qscale_table[xy] = s->qscale;
821 for (i = 0; i < 6; i++) {
823 int dc = mpeg4_decode_dc(s, i, &dc_pred_dir);
825 av_log(s->avctx, AV_LOG_ERROR,
826 "DC corrupted at %d %d\n", s->mb_x, s->mb_y);
833 s->cbp_table[xy] &= 3; // remove dquant
834 s->cbp_table[xy] |= cbpy << 2;
835 s->current_picture.mb_type[xy] |= ac_pred * MB_TYPE_ACPRED;
836 s->pred_dir_table[xy] = dir;
837 } else if (IS_SKIP(s->current_picture.mb_type[xy])) {
838 s->current_picture.qscale_table[xy] = s->qscale;
839 s->cbp_table[xy] = 0;
841 int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
844 av_log(s->avctx, AV_LOG_ERROR,
845 "P cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
849 if (s->cbp_table[xy] & 8)
850 ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
851 s->current_picture.qscale_table[xy] = s->qscale;
853 s->cbp_table[xy] &= 3; // remove dquant
854 s->cbp_table[xy] |= (cbpy ^ 0xf) << 2;
858 if (mb_num >= mb_count)
866 * Decode the first and second partition.
867 * @return <0 if error (and sets error type in the error_status_table)
869 int ff_mpeg4_decode_partitions(Mpeg4DecContext *ctx)
871 MpegEncContext *s = &ctx->m;
873 const int part_a_error = s->pict_type == AV_PICTURE_TYPE_I ? (ER_DC_ERROR | ER_MV_ERROR) : ER_MV_ERROR;
874 const int part_a_end = s->pict_type == AV_PICTURE_TYPE_I ? (ER_DC_END | ER_MV_END) : ER_MV_END;
876 mb_num = mpeg4_decode_partition_a(ctx);
878 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
879 s->mb_x, s->mb_y, part_a_error);
883 if (s->resync_mb_x + s->resync_mb_y * s->mb_width + mb_num > s->mb_num) {
884 av_log(s->avctx, AV_LOG_ERROR, "slice below monitor ...\n");
885 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
886 s->mb_x, s->mb_y, part_a_error);
890 s->mb_num_left = mb_num;
892 if (s->pict_type == AV_PICTURE_TYPE_I) {
893 while (show_bits(&s->gb, 9) == 1)
894 skip_bits(&s->gb, 9);
895 if (get_bits_long(&s->gb, 19) != DC_MARKER) {
896 av_log(s->avctx, AV_LOG_ERROR,
897 "marker missing after first I partition at %d %d\n",
902 while (show_bits(&s->gb, 10) == 1)
903 skip_bits(&s->gb, 10);
904 if (get_bits(&s->gb, 17) != MOTION_MARKER) {
905 av_log(s->avctx, AV_LOG_ERROR,
906 "marker missing after first P partition at %d %d\n",
911 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
912 s->mb_x - 1, s->mb_y, part_a_end);
914 if (mpeg4_decode_partition_b(s, mb_num) < 0) {
915 if (s->pict_type == AV_PICTURE_TYPE_P)
916 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
917 s->mb_x, s->mb_y, ER_DC_ERROR);
920 if (s->pict_type == AV_PICTURE_TYPE_P)
921 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
922 s->mb_x - 1, s->mb_y, ER_DC_END);
930 * @return <0 if an error occurred
932 static inline int mpeg4_decode_block(Mpeg4DecContext *ctx, int16_t *block,
933 int n, int coded, int intra, int rvlc)
935 MpegEncContext *s = &ctx->m;
936 int level, i, last, run, qmul, qadd, dc_pred_dir;
939 const uint8_t *scan_table;
941 // Note intra & rvlc should be optimized away if this is inlined
944 if (ctx->use_intra_dc_vlc) {
946 if (s->partitioned_frame) {
947 level = s->dc_val[0][s->block_index[n]];
949 level = FASTDIV((level + (s->y_dc_scale >> 1)), s->y_dc_scale);
951 level = FASTDIV((level + (s->c_dc_scale >> 1)), s->c_dc_scale);
952 dc_pred_dir = (s->pred_dir_table[s->mb_x + s->mb_y * s->mb_stride] << n) & 32;
954 level = mpeg4_decode_dc(s, n, &dc_pred_dir);
962 ff_mpeg4_pred_dc(s, n, 0, &dc_pred_dir, 0);
968 rl = &ff_rvlc_rl_intra;
969 rl_vlc = ff_rvlc_rl_intra.rl_vlc[0];
971 rl = &ff_mpeg4_rl_intra;
972 rl_vlc = ff_mpeg4_rl_intra.rl_vlc[0];
975 if (dc_pred_dir == 0)
976 scan_table = s->intra_v_scantable.permutated; /* left */
978 scan_table = s->intra_h_scantable.permutated; /* top */
980 scan_table = s->intra_scantable.permutated;
987 s->block_last_index[n] = i;
991 rl = &ff_rvlc_rl_inter;
993 rl = &ff_h263_rl_inter;
995 scan_table = s->intra_scantable.permutated;
1001 rl_vlc = ff_rvlc_rl_inter.rl_vlc[0];
1003 rl_vlc = ff_h263_rl_inter.rl_vlc[0];
1005 qmul = s->qscale << 1;
1006 qadd = (s->qscale - 1) | 1;
1008 rl_vlc = ff_rvlc_rl_inter.rl_vlc[s->qscale];
1010 rl_vlc = ff_h263_rl_inter.rl_vlc[s->qscale];
1014 OPEN_READER(re, &s->gb);
1016 UPDATE_CACHE(re, &s->gb);
1017 GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0);
1021 if (SHOW_UBITS(re, &s->gb, 1) == 0) {
1022 av_log(s->avctx, AV_LOG_ERROR,
1023 "1. marker bit missing in rvlc esc\n");
1026 SKIP_CACHE(re, &s->gb, 1);
1028 last = SHOW_UBITS(re, &s->gb, 1);
1029 SKIP_CACHE(re, &s->gb, 1);
1030 run = SHOW_UBITS(re, &s->gb, 6);
1031 SKIP_COUNTER(re, &s->gb, 1 + 1 + 6);
1032 UPDATE_CACHE(re, &s->gb);
1034 if (SHOW_UBITS(re, &s->gb, 1) == 0) {
1035 av_log(s->avctx, AV_LOG_ERROR,
1036 "2. marker bit missing in rvlc esc\n");
1039 SKIP_CACHE(re, &s->gb, 1);
1041 level = SHOW_UBITS(re, &s->gb, 11);
1042 SKIP_CACHE(re, &s->gb, 11);
1044 if (SHOW_UBITS(re, &s->gb, 5) != 0x10) {
1045 av_log(s->avctx, AV_LOG_ERROR, "reverse esc missing\n");
1048 SKIP_CACHE(re, &s->gb, 5);
1050 level = level * qmul + qadd;
1051 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1052 SKIP_COUNTER(re, &s->gb, 1 + 11 + 5 + 1);
1059 cache = GET_CACHE(re, &s->gb);
1062 cache ^= 0xC0000000;
1064 if (cache & 0x80000000) {
1065 if (cache & 0x40000000) {
1067 SKIP_CACHE(re, &s->gb, 2);
1068 last = SHOW_UBITS(re, &s->gb, 1);
1069 SKIP_CACHE(re, &s->gb, 1);
1070 run = SHOW_UBITS(re, &s->gb, 6);
1071 SKIP_COUNTER(re, &s->gb, 2 + 1 + 6);
1072 UPDATE_CACHE(re, &s->gb);
1075 level = SHOW_SBITS(re, &s->gb, 12);
1076 LAST_SKIP_BITS(re, &s->gb, 12);
1078 if (SHOW_UBITS(re, &s->gb, 1) == 0) {
1079 av_log(s->avctx, AV_LOG_ERROR,
1080 "1. marker bit missing in 3. esc\n");
1083 SKIP_CACHE(re, &s->gb, 1);
1085 level = SHOW_SBITS(re, &s->gb, 12);
1086 SKIP_CACHE(re, &s->gb, 12);
1088 if (SHOW_UBITS(re, &s->gb, 1) == 0) {
1089 av_log(s->avctx, AV_LOG_ERROR,
1090 "2. marker bit missing in 3. esc\n");
1094 SKIP_COUNTER(re, &s->gb, 1 + 12 + 1);
1098 level = level * qmul + qadd;
1100 level = level * qmul - qadd;
1102 if ((unsigned)(level + 2048) > 4095) {
1103 if (s->avctx->err_recognition & AV_EF_BITSTREAM) {
1104 if (level > 2560 || level < -2560) {
1105 av_log(s->avctx, AV_LOG_ERROR,
1106 "|level| overflow in 3. esc, qp=%d\n",
1111 level = level < 0 ? -2048 : 2047;
1119 SKIP_BITS(re, &s->gb, 2);
1120 GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1);
1121 i += run + rl->max_run[run >> 7][level / qmul] + 1; // FIXME opt indexing
1122 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1123 LAST_SKIP_BITS(re, &s->gb, 1);
1127 SKIP_BITS(re, &s->gb, 1);
1128 GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1);
1130 level = level + rl->max_level[run >> 7][(run - 1) & 63] * qmul; // FIXME opt indexing
1131 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1132 LAST_SKIP_BITS(re, &s->gb, 1);
1137 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1138 LAST_SKIP_BITS(re, &s->gb, 1);
1143 av_log(s->avctx, AV_LOG_ERROR,
1144 "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1148 block[scan_table[i]] = level;
1152 block[scan_table[i]] = level;
1154 CLOSE_READER(re, &s->gb);
1159 if (!ctx->use_intra_dc_vlc) {
1160 block[0] = ff_mpeg4_pred_dc(s, n, block[0], &dc_pred_dir, 0);
1162 i -= i >> 31; // if (i == -1) i = 0;
1165 ff_mpeg4_pred_ac(s, block, n, dc_pred_dir);
1167 i = 63; // FIXME not optimal
1169 s->block_last_index[n] = i;
1174 * decode partition C of one MB.
1175 * @return <0 if an error occurred
1177 static int mpeg4_decode_partitioned_mb(MpegEncContext *s, int16_t block[6][64])
1179 Mpeg4DecContext *ctx = (Mpeg4DecContext *)s;
1181 const int xy = s->mb_x + s->mb_y * s->mb_stride;
1183 mb_type = s->current_picture.mb_type[xy];
1184 cbp = s->cbp_table[xy];
1186 ctx->use_intra_dc_vlc = s->qscale < ctx->intra_dc_threshold;
1188 if (s->current_picture.qscale_table[xy] != s->qscale)
1189 ff_set_qscale(s, s->current_picture.qscale_table[xy]);
1191 if (s->pict_type == AV_PICTURE_TYPE_P ||
1192 s->pict_type == AV_PICTURE_TYPE_S) {
1194 for (i = 0; i < 4; i++) {
1195 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0];
1196 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1];
1198 s->mb_intra = IS_INTRA(mb_type);
1200 if (IS_SKIP(mb_type)) {
1202 for (i = 0; i < 6; i++)
1203 s->block_last_index[i] = -1;
1204 s->mv_dir = MV_DIR_FORWARD;
1205 s->mv_type = MV_TYPE_16X16;
1206 if (s->pict_type == AV_PICTURE_TYPE_S
1207 && ctx->vol_sprite_usage == GMC_SPRITE) {
1214 } else if (s->mb_intra) {
1215 s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]);
1216 } else if (!s->mb_intra) {
1217 // s->mcsel = 0; // FIXME do we need to init that?
1219 s->mv_dir = MV_DIR_FORWARD;
1220 if (IS_8X8(mb_type)) {
1221 s->mv_type = MV_TYPE_8X8;
1223 s->mv_type = MV_TYPE_16X16;
1226 } else { /* I-Frame */
1228 s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]);
1231 if (!IS_SKIP(mb_type)) {
1233 s->bdsp.clear_blocks(s->block[0]);
1234 /* decode each block */
1235 for (i = 0; i < 6; i++) {
1236 if (mpeg4_decode_block(ctx, block[i], i, cbp & 32, s->mb_intra, ctx->rvlc) < 0) {
1237 av_log(s->avctx, AV_LOG_ERROR,
1238 "texture corrupted at %d %d %d\n",
1239 s->mb_x, s->mb_y, s->mb_intra);
1246 /* per-MB end of slice check */
1247 if (--s->mb_num_left <= 0) {
1248 if (mpeg4_is_resync(s))
1253 if (mpeg4_is_resync(s)) {
1254 const int delta = s->mb_x + 1 == s->mb_width ? 2 : 1;
1255 if (s->cbp_table[xy + delta])
1262 static int mpeg4_decode_mb(MpegEncContext *s, int16_t block[6][64])
1264 Mpeg4DecContext *ctx = (Mpeg4DecContext *)s;
1265 int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant;
1267 static int8_t quant_tab[4] = { -1, -2, 1, 2 };
1268 const int xy = s->mb_x + s->mb_y * s->mb_stride;
1270 assert(s->h263_pred);
1272 if (s->pict_type == AV_PICTURE_TYPE_P ||
1273 s->pict_type == AV_PICTURE_TYPE_S) {
1275 if (get_bits1(&s->gb)) {
1278 for (i = 0; i < 6; i++)
1279 s->block_last_index[i] = -1;
1280 s->mv_dir = MV_DIR_FORWARD;
1281 s->mv_type = MV_TYPE_16X16;
1282 if (s->pict_type == AV_PICTURE_TYPE_S &&
1283 ctx->vol_sprite_usage == GMC_SPRITE) {
1284 s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
1289 s->mv[0][0][0] = get_amv(ctx, 0);
1290 s->mv[0][0][1] = get_amv(ctx, 1);
1293 s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
1303 cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
1305 av_log(s->avctx, AV_LOG_ERROR,
1306 "cbpc damaged at %d %d\n", s->mb_x, s->mb_y);
1309 } while (cbpc == 20);
1311 s->bdsp.clear_blocks(s->block[0]);
1313 s->mb_intra = ((cbpc & 4) != 0);
1317 if (s->pict_type == AV_PICTURE_TYPE_S &&
1318 ctx->vol_sprite_usage == GMC_SPRITE && (cbpc & 16) == 0)
1319 s->mcsel = get_bits1(&s->gb);
1322 cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1) ^ 0x0F;
1324 cbp = (cbpc & 3) | (cbpy << 2);
1326 ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
1327 if ((!s->progressive_sequence) &&
1328 (cbp || (s->workaround_bugs & FF_BUG_XVID_ILACE)))
1329 s->interlaced_dct = get_bits1(&s->gb);
1331 s->mv_dir = MV_DIR_FORWARD;
1332 if ((cbpc & 16) == 0) {
1334 s->current_picture.mb_type[xy] = MB_TYPE_GMC |
1337 /* 16x16 global motion prediction */
1338 s->mv_type = MV_TYPE_16X16;
1339 mx = get_amv(ctx, 0);
1340 my = get_amv(ctx, 1);
1341 s->mv[0][0][0] = mx;
1342 s->mv[0][0][1] = my;
1343 } else if ((!s->progressive_sequence) && get_bits1(&s->gb)) {
1344 s->current_picture.mb_type[xy] = MB_TYPE_16x8 |
1347 /* 16x8 field motion prediction */
1348 s->mv_type = MV_TYPE_FIELD;
1350 s->field_select[0][0] = get_bits1(&s->gb);
1351 s->field_select[0][1] = get_bits1(&s->gb);
1353 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
1355 for (i = 0; i < 2; i++) {
1356 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
1360 my = ff_h263_decode_motion(s, pred_y / 2, s->f_code);
1364 s->mv[0][i][0] = mx;
1365 s->mv[0][i][1] = my;
1368 s->current_picture.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1369 /* 16x16 motion prediction */
1370 s->mv_type = MV_TYPE_16X16;
1371 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
1372 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
1377 my = ff_h263_decode_motion(s, pred_y, s->f_code);
1381 s->mv[0][0][0] = mx;
1382 s->mv[0][0][1] = my;
1385 s->current_picture.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0;
1386 s->mv_type = MV_TYPE_8X8;
1387 for (i = 0; i < 4; i++) {
1388 mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
1389 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
1393 my = ff_h263_decode_motion(s, pred_y, s->f_code);
1396 s->mv[0][i][0] = mx;
1397 s->mv[0][i][1] = my;
1402 } else if (s->pict_type == AV_PICTURE_TYPE_B) {
1403 int modb1; // first bit of modb
1404 int modb2; // second bit of modb
1407 s->mb_intra = 0; // B-frames never contain intra blocks
1408 s->mcsel = 0; // ... true gmc blocks
1411 for (i = 0; i < 2; i++) {
1412 s->last_mv[i][0][0] =
1413 s->last_mv[i][0][1] =
1414 s->last_mv[i][1][0] =
1415 s->last_mv[i][1][1] = 0;
1418 ff_thread_await_progress(&s->next_picture_ptr->tf, s->mb_y, 0);
1421 /* if we skipped it in the future P Frame than skip it now too */
1422 s->mb_skipped = s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC
1424 if (s->mb_skipped) {
1426 for (i = 0; i < 6; i++)
1427 s->block_last_index[i] = -1;
1429 s->mv_dir = MV_DIR_FORWARD;
1430 s->mv_type = MV_TYPE_16X16;
1435 s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
1441 modb1 = get_bits1(&s->gb);
1443 // like MB_TYPE_B_DIRECT but no vectors coded
1444 mb_type = MB_TYPE_DIRECT2 | MB_TYPE_SKIP | MB_TYPE_L0L1;
1447 modb2 = get_bits1(&s->gb);
1448 mb_type = get_vlc2(&s->gb, mb_type_b_vlc.table, MB_TYPE_B_VLC_BITS, 1);
1450 av_log(s->avctx, AV_LOG_ERROR, "illegal MB_type\n");
1453 mb_type = mb_type_b_map[mb_type];
1457 s->bdsp.clear_blocks(s->block[0]);
1458 cbp = get_bits(&s->gb, 6);
1461 if ((!IS_DIRECT(mb_type)) && cbp) {
1462 if (get_bits1(&s->gb))
1463 ff_set_qscale(s, s->qscale + get_bits1(&s->gb) * 4 - 2);
1466 if (!s->progressive_sequence) {
1468 s->interlaced_dct = get_bits1(&s->gb);
1470 if (!IS_DIRECT(mb_type) && get_bits1(&s->gb)) {
1471 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1472 mb_type &= ~MB_TYPE_16x16;
1474 if (USES_LIST(mb_type, 0)) {
1475 s->field_select[0][0] = get_bits1(&s->gb);
1476 s->field_select[0][1] = get_bits1(&s->gb);
1478 if (USES_LIST(mb_type, 1)) {
1479 s->field_select[1][0] = get_bits1(&s->gb);
1480 s->field_select[1][1] = get_bits1(&s->gb);
1486 if ((mb_type & (MB_TYPE_DIRECT2 | MB_TYPE_INTERLACED)) == 0) {
1487 s->mv_type = MV_TYPE_16X16;
1489 if (USES_LIST(mb_type, 0)) {
1490 s->mv_dir = MV_DIR_FORWARD;
1492 mx = ff_h263_decode_motion(s, s->last_mv[0][0][0], s->f_code);
1493 my = ff_h263_decode_motion(s, s->last_mv[0][0][1], s->f_code);
1494 s->last_mv[0][1][0] =
1495 s->last_mv[0][0][0] =
1496 s->mv[0][0][0] = mx;
1497 s->last_mv[0][1][1] =
1498 s->last_mv[0][0][1] =
1499 s->mv[0][0][1] = my;
1502 if (USES_LIST(mb_type, 1)) {
1503 s->mv_dir |= MV_DIR_BACKWARD;
1505 mx = ff_h263_decode_motion(s, s->last_mv[1][0][0], s->b_code);
1506 my = ff_h263_decode_motion(s, s->last_mv[1][0][1], s->b_code);
1507 s->last_mv[1][1][0] =
1508 s->last_mv[1][0][0] =
1509 s->mv[1][0][0] = mx;
1510 s->last_mv[1][1][1] =
1511 s->last_mv[1][0][1] =
1512 s->mv[1][0][1] = my;
1514 } else if (!IS_DIRECT(mb_type)) {
1515 s->mv_type = MV_TYPE_FIELD;
1517 if (USES_LIST(mb_type, 0)) {
1518 s->mv_dir = MV_DIR_FORWARD;
1520 for (i = 0; i < 2; i++) {
1521 mx = ff_h263_decode_motion(s, s->last_mv[0][i][0], s->f_code);
1522 my = ff_h263_decode_motion(s, s->last_mv[0][i][1] / 2, s->f_code);
1523 s->last_mv[0][i][0] =
1524 s->mv[0][i][0] = mx;
1525 s->last_mv[0][i][1] = (s->mv[0][i][1] = my) * 2;
1529 if (USES_LIST(mb_type, 1)) {
1530 s->mv_dir |= MV_DIR_BACKWARD;
1532 for (i = 0; i < 2; i++) {
1533 mx = ff_h263_decode_motion(s, s->last_mv[1][i][0], s->b_code);
1534 my = ff_h263_decode_motion(s, s->last_mv[1][i][1] / 2, s->b_code);
1535 s->last_mv[1][i][0] =
1536 s->mv[1][i][0] = mx;
1537 s->last_mv[1][i][1] = (s->mv[1][i][1] = my) * 2;
1543 if (IS_DIRECT(mb_type)) {
1544 if (IS_SKIP(mb_type)) {
1548 mx = ff_h263_decode_motion(s, 0, 1);
1549 my = ff_h263_decode_motion(s, 0, 1);
1552 s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
1553 mb_type |= ff_mpeg4_set_direct_mv(s, mx, my);
1555 s->current_picture.mb_type[xy] = mb_type;
1556 } else { /* I-Frame */
1558 cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
1560 av_log(s->avctx, AV_LOG_ERROR,
1561 "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y);
1564 } while (cbpc == 8);
1570 s->ac_pred = get_bits1(&s->gb);
1572 s->current_picture.mb_type[xy] = MB_TYPE_INTRA | MB_TYPE_ACPRED;
1574 s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
1576 cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
1578 av_log(s->avctx, AV_LOG_ERROR,
1579 "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y);
1582 cbp = (cbpc & 3) | (cbpy << 2);
1584 ctx->use_intra_dc_vlc = s->qscale < ctx->intra_dc_threshold;
1587 ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
1589 if (!s->progressive_sequence)
1590 s->interlaced_dct = get_bits1(&s->gb);
1592 s->bdsp.clear_blocks(s->block[0]);
1593 /* decode each block */
1594 for (i = 0; i < 6; i++) {
1595 if (mpeg4_decode_block(ctx, block[i], i, cbp & 32, 1, 0) < 0)
1602 /* decode each block */
1603 for (i = 0; i < 6; i++) {
1604 if (mpeg4_decode_block(ctx, block[i], i, cbp & 32, 0, 0) < 0)
1610 /* per-MB end of slice check */
1611 if (s->codec_id == AV_CODEC_ID_MPEG4) {
1612 if (mpeg4_is_resync(s)) {
1613 const int delta = s->mb_x + 1 == s->mb_width ? 2 : 1;
1615 if (s->pict_type == AV_PICTURE_TYPE_B &&
1616 s->next_picture.mbskip_table[xy + delta]) {
1617 ff_thread_await_progress(&s->next_picture_ptr->tf,
1618 (s->mb_x + delta >= s->mb_width)
1619 ? FFMIN(s->mb_y + 1, s->mb_height - 1)
1623 if (s->pict_type == AV_PICTURE_TYPE_B &&
1624 s->next_picture.mbskip_table[xy + delta])
1633 static int mpeg4_decode_gop_header(MpegEncContext *s, GetBitContext *gb)
1635 int hours, minutes, seconds;
1636 unsigned time_code = show_bits(gb, 18);
1638 if (time_code & 0x40) { /* marker_bit */
1639 hours = time_code >> 13;
1640 minutes = time_code >> 7 & 0x3f;
1641 seconds = time_code & 0x3f;
1642 s->time_base = seconds + 60 * (minutes + 60 * hours);
1643 skip_bits(gb, 20); /* time_code, closed_gov, broken_link */
1645 av_log(s->avctx, AV_LOG_WARNING, "GOP header missing marker_bit\n");
1651 static int mpeg4_decode_profile_level(MpegEncContext *s, GetBitContext *gb)
1653 int profile_and_level_indication;
1655 profile_and_level_indication = get_bits(gb, 8);
1657 s->avctx->profile = (profile_and_level_indication & 0xf0) >> 4;
1658 s->avctx->level = (profile_and_level_indication & 0x0f);
1660 // for Simple profile, level 0
1661 if (s->avctx->profile == 0 && s->avctx->level == 8) {
1662 s->avctx->level = 0;
1668 static int decode_vol_header(Mpeg4DecContext *ctx, GetBitContext *gb)
1670 MpegEncContext *s = &ctx->m;
1671 int width, height, vo_ver_id;
1674 skip_bits(gb, 1); /* random access */
1675 s->vo_type = get_bits(gb, 8);
1676 if (get_bits1(gb) != 0) { /* is_ol_id */
1677 vo_ver_id = get_bits(gb, 4); /* vo_ver_id */
1678 skip_bits(gb, 3); /* vo_priority */
1682 s->aspect_ratio_info = get_bits(gb, 4);
1683 if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) {
1684 s->avctx->sample_aspect_ratio.num = get_bits(gb, 8); // par_width
1685 s->avctx->sample_aspect_ratio.den = get_bits(gb, 8); // par_height
1687 s->avctx->sample_aspect_ratio = ff_h263_pixel_aspect[s->aspect_ratio_info];
1690 if ((ctx->vol_control_parameters = get_bits1(gb))) { /* vol control parameter */
1691 int chroma_format = get_bits(gb, 2);
1692 if (chroma_format != CHROMA_420)
1693 av_log(s->avctx, AV_LOG_ERROR, "illegal chroma format\n");
1695 s->low_delay = get_bits1(gb);
1696 if (get_bits1(gb)) { /* vbv parameters */
1697 get_bits(gb, 15); /* first_half_bitrate */
1698 skip_bits1(gb); /* marker */
1699 get_bits(gb, 15); /* latter_half_bitrate */
1700 skip_bits1(gb); /* marker */
1701 get_bits(gb, 15); /* first_half_vbv_buffer_size */
1702 skip_bits1(gb); /* marker */
1703 get_bits(gb, 3); /* latter_half_vbv_buffer_size */
1704 get_bits(gb, 11); /* first_half_vbv_occupancy */
1705 skip_bits1(gb); /* marker */
1706 get_bits(gb, 15); /* latter_half_vbv_occupancy */
1707 skip_bits1(gb); /* marker */
1710 /* is setting low delay flag only once the smartest thing to do?
1711 * low delay detection won't be overriden. */
1712 if (s->picture_number == 0)
1716 ctx->shape = get_bits(gb, 2); /* vol shape */
1717 if (ctx->shape != RECT_SHAPE)
1718 av_log(s->avctx, AV_LOG_ERROR, "only rectangular vol supported\n");
1719 if (ctx->shape == GRAY_SHAPE && vo_ver_id != 1) {
1720 av_log(s->avctx, AV_LOG_ERROR, "Gray shape not supported\n");
1721 skip_bits(gb, 4); /* video_object_layer_shape_extension */
1724 check_marker(gb, "before time_increment_resolution");
1726 s->avctx->framerate.num = get_bits(gb, 16);
1727 if (!s->avctx->framerate.num) {
1728 av_log(s->avctx, AV_LOG_ERROR, "framerate==0\n");
1732 ctx->time_increment_bits = av_log2(s->avctx->framerate.num - 1) + 1;
1733 if (ctx->time_increment_bits < 1)
1734 ctx->time_increment_bits = 1;
1736 check_marker(gb, "before fixed_vop_rate");
1738 if (get_bits1(gb) != 0) /* fixed_vop_rate */
1739 s->avctx->framerate.den = get_bits(gb, ctx->time_increment_bits);
1741 s->avctx->framerate.den = 1;
1745 if (ctx->shape != BIN_ONLY_SHAPE) {
1746 if (ctx->shape == RECT_SHAPE) {
1747 skip_bits1(gb); /* marker */
1748 width = get_bits(gb, 13);
1749 skip_bits1(gb); /* marker */
1750 height = get_bits(gb, 13);
1751 skip_bits1(gb); /* marker */
1752 if (width && height && /* they should be non zero but who knows */
1753 !(s->width && s->codec_tag == AV_RL32("MP4S"))) {
1754 if (s->width && s->height &&
1755 (s->width != width || s->height != height))
1756 s->context_reinit = 1;
1762 s->progressive_sequence =
1763 s->progressive_frame = get_bits1(gb) ^ 1;
1764 s->interlaced_dct = 0;
1765 if (!get_bits1(gb) && (s->avctx->debug & FF_DEBUG_PICT_INFO))
1766 av_log(s->avctx, AV_LOG_INFO, /* OBMC Disable */
1767 "MPEG4 OBMC not supported (very likely buggy encoder)\n");
1769 ctx->vol_sprite_usage = get_bits1(gb); /* vol_sprite_usage */
1771 ctx->vol_sprite_usage = get_bits(gb, 2); /* vol_sprite_usage */
1773 if (ctx->vol_sprite_usage == STATIC_SPRITE)
1774 av_log(s->avctx, AV_LOG_ERROR, "Static Sprites not supported\n");
1775 if (ctx->vol_sprite_usage == STATIC_SPRITE ||
1776 ctx->vol_sprite_usage == GMC_SPRITE) {
1777 if (ctx->vol_sprite_usage == STATIC_SPRITE) {
1778 skip_bits(gb, 13); // sprite_width
1779 skip_bits1(gb); /* marker */
1780 skip_bits(gb, 13); // sprite_height
1781 skip_bits1(gb); /* marker */
1782 skip_bits(gb, 13); // sprite_left
1783 skip_bits1(gb); /* marker */
1784 skip_bits(gb, 13); // sprite_top
1785 skip_bits1(gb); /* marker */
1787 ctx->num_sprite_warping_points = get_bits(gb, 6);
1788 if (ctx->num_sprite_warping_points > 3) {
1789 av_log(s->avctx, AV_LOG_ERROR,
1790 "%d sprite_warping_points\n",
1791 ctx->num_sprite_warping_points);
1792 ctx->num_sprite_warping_points = 0;
1795 s->sprite_warping_accuracy = get_bits(gb, 2);
1796 ctx->sprite_brightness_change = get_bits1(gb);
1797 if (ctx->vol_sprite_usage == STATIC_SPRITE)
1798 skip_bits1(gb); // low_latency_sprite
1800 // FIXME sadct disable bit if verid!=1 && shape not rect
1802 if (get_bits1(gb) == 1) { /* not_8_bit */
1803 s->quant_precision = get_bits(gb, 4); /* quant_precision */
1804 if (get_bits(gb, 4) != 8) /* bits_per_pixel */
1805 av_log(s->avctx, AV_LOG_ERROR, "N-bit not supported\n");
1806 if (s->quant_precision != 5)
1807 av_log(s->avctx, AV_LOG_ERROR,
1808 "quant precision %d\n", s->quant_precision);
1810 s->quant_precision = 5;
1813 // FIXME a bunch of grayscale shape things
1815 if ((s->mpeg_quant = get_bits1(gb))) { /* vol_quant_type */
1818 /* load default matrixes */
1819 for (i = 0; i < 64; i++) {
1820 int j = s->idsp.idct_permutation[i];
1821 v = ff_mpeg4_default_intra_matrix[i];
1822 s->intra_matrix[j] = v;
1823 s->chroma_intra_matrix[j] = v;
1825 v = ff_mpeg4_default_non_intra_matrix[i];
1826 s->inter_matrix[j] = v;
1827 s->chroma_inter_matrix[j] = v;
1830 /* load custom intra matrix */
1831 if (get_bits1(gb)) {
1833 for (i = 0; i < 64; i++) {
1835 v = get_bits(gb, 8);
1840 j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1841 s->intra_matrix[j] = last;
1842 s->chroma_intra_matrix[j] = last;
1845 /* replicate last value */
1846 for (; i < 64; i++) {
1847 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1848 s->intra_matrix[j] = last;
1849 s->chroma_intra_matrix[j] = last;
1853 /* load custom non intra matrix */
1854 if (get_bits1(gb)) {
1856 for (i = 0; i < 64; i++) {
1858 v = get_bits(gb, 8);
1863 j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1864 s->inter_matrix[j] = v;
1865 s->chroma_inter_matrix[j] = v;
1868 /* replicate last value */
1869 for (; i < 64; i++) {
1870 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1871 s->inter_matrix[j] = last;
1872 s->chroma_inter_matrix[j] = last;
1876 // FIXME a bunch of grayscale shape things
1880 s->quarter_sample = get_bits1(gb);
1882 s->quarter_sample = 0;
1884 if (!get_bits1(gb)) {
1885 int pos = get_bits_count(gb);
1886 int estimation_method = get_bits(gb, 2);
1887 if (estimation_method < 2) {
1888 if (!get_bits1(gb)) {
1889 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* opaque */
1890 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* transparent */
1891 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_cae */
1892 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* inter_cae */
1893 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* no_update */
1894 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* upampling */
1896 if (!get_bits1(gb)) {
1897 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_blocks */
1898 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* inter_blocks */
1899 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* inter4v_blocks */
1900 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* not coded blocks */
1902 if (!check_marker(gb, "in complexity estimation part 1")) {
1903 skip_bits_long(gb, pos - get_bits_count(gb));
1906 if (!get_bits1(gb)) {
1907 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* dct_coeffs */
1908 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* dct_lines */
1909 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* vlc_syms */
1910 ctx->cplx_estimation_trash_i += 4 * get_bits1(gb); /* vlc_bits */
1912 if (!get_bits1(gb)) {
1913 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* apm */
1914 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* npm */
1915 ctx->cplx_estimation_trash_b += 8 * get_bits1(gb); /* interpolate_mc_q */
1916 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* forwback_mc_q */
1917 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel2 */
1918 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel4 */
1920 if (!check_marker(gb, "in complexity estimation part 2")) {
1921 skip_bits_long(gb, pos - get_bits_count(gb));
1924 if (estimation_method == 1) {
1925 ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* sadct */
1926 ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* qpel */
1929 av_log(s->avctx, AV_LOG_ERROR,
1930 "Invalid Complexity estimation method %d\n",
1935 ctx->cplx_estimation_trash_i =
1936 ctx->cplx_estimation_trash_p =
1937 ctx->cplx_estimation_trash_b = 0;
1940 ctx->resync_marker = !get_bits1(gb); /* resync_marker_disabled */
1942 s->data_partitioning = get_bits1(gb);
1943 if (s->data_partitioning)
1944 ctx->rvlc = get_bits1(gb);
1946 if (vo_ver_id != 1) {
1947 ctx->new_pred = get_bits1(gb);
1948 if (ctx->new_pred) {
1949 av_log(s->avctx, AV_LOG_ERROR, "new pred not supported\n");
1950 skip_bits(gb, 2); /* requested upstream message type */
1951 skip_bits1(gb); /* newpred segment type */
1953 if (get_bits1(gb)) // reduced_res_vop
1954 av_log(s->avctx, AV_LOG_ERROR,
1955 "reduced resolution VOP not supported\n");
1960 ctx->scalability = get_bits1(gb);
1962 if (ctx->scalability) {
1963 GetBitContext bak = *gb;
1964 int h_sampling_factor_n;
1965 int h_sampling_factor_m;
1966 int v_sampling_factor_n;
1967 int v_sampling_factor_m;
1969 skip_bits1(gb); // hierarchy_type
1970 skip_bits(gb, 4); /* ref_layer_id */
1971 skip_bits1(gb); /* ref_layer_sampling_dir */
1972 h_sampling_factor_n = get_bits(gb, 5);
1973 h_sampling_factor_m = get_bits(gb, 5);
1974 v_sampling_factor_n = get_bits(gb, 5);
1975 v_sampling_factor_m = get_bits(gb, 5);
1976 ctx->enhancement_type = get_bits1(gb);
1978 if (h_sampling_factor_n == 0 || h_sampling_factor_m == 0 ||
1979 v_sampling_factor_n == 0 || v_sampling_factor_m == 0) {
1980 /* illegal scalability header (VERY broken encoder),
1981 * trying to workaround */
1982 ctx->scalability = 0;
1985 av_log(s->avctx, AV_LOG_ERROR, "scalability not supported\n");
1987 // bin shape stuff FIXME
1995 * Decode the user data stuff in the header.
1996 * Also initializes divx/xvid/lavc_version/build.
1998 static int decode_user_data(Mpeg4DecContext *ctx, GetBitContext *gb)
2000 MpegEncContext *s = &ctx->m;
2004 int ver = 0, build = 0, ver2 = 0, ver3 = 0;
2007 for (i = 0; i < 255 && get_bits_count(gb) < gb->size_in_bits; i++) {
2008 if (show_bits(gb, 23) == 0)
2010 buf[i] = get_bits(gb, 8);
2014 /* divx detection */
2015 e = sscanf(buf, "DivX%dBuild%d%c", &ver, &build, &last);
2017 e = sscanf(buf, "DivX%db%d%c", &ver, &build, &last);
2019 ctx->divx_version = ver;
2020 ctx->divx_build = build;
2021 s->divx_packed = e == 3 && last == 'p';
2022 if (s->divx_packed && !ctx->showed_packed_warning) {
2023 av_log(s->avctx, AV_LOG_WARNING,
2024 "Invalid and inefficient vfw-avi packed B frames detected\n");
2025 ctx->showed_packed_warning = 1;
2029 /* libavcodec detection */
2030 e = sscanf(buf, "FFmpe%*[^b]b%d", &build) + 3;
2032 e = sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build);
2034 e = sscanf(buf, "Lavc%d.%d.%d", &ver, &ver2, &ver3) + 1;
2036 build = (ver << 16) + (ver2 << 8) + ver3;
2039 if (strcmp(buf, "ffmpeg") == 0)
2040 ctx->lavc_build = 4600;
2043 ctx->lavc_build = build;
2045 /* Xvid detection */
2046 e = sscanf(buf, "XviD%d", &build);
2048 ctx->xvid_build = build;
2050 if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1) {
2051 if (s->codec_tag == AV_RL32("XVID") ||
2052 s->codec_tag == AV_RL32("XVIX") ||
2053 s->codec_tag == AV_RL32("RMP4") ||
2054 s->codec_tag == AV_RL32("ZMP4") ||
2055 s->codec_tag == AV_RL32("SIPP"))
2056 ctx->xvid_build = 0;
2059 if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1)
2060 if (s->codec_tag == AV_RL32("DIVX") && s->vo_type == 0 &&
2061 ctx->vol_control_parameters == 0)
2062 ctx->divx_version = 400; // divx 4
2064 if (ctx->xvid_build >= 0 && ctx->divx_version >= 0) {
2066 ctx->divx_build = -1;
2069 if (CONFIG_MPEG4_DECODER && ctx->xvid_build >= 0)
2070 ff_xvid_idct_init(&s->idsp, s->avctx);
2075 static int decode_vop_header(Mpeg4DecContext *ctx, GetBitContext *gb)
2077 MpegEncContext *s = &ctx->m;
2078 int time_incr, time_increment;
2080 s->pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* pict type: I = 0 , P = 1 */
2081 if (s->pict_type == AV_PICTURE_TYPE_B && s->low_delay &&
2082 ctx->vol_control_parameters == 0 && !(s->avctx->flags & CODEC_FLAG_LOW_DELAY)) {
2083 av_log(s->avctx, AV_LOG_ERROR, "low_delay flag set incorrectly, clearing it\n");
2087 s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B;
2088 if (s->partitioned_frame)
2089 s->decode_mb = mpeg4_decode_partitioned_mb;
2091 s->decode_mb = mpeg4_decode_mb;
2094 while (get_bits1(gb) != 0)
2097 check_marker(gb, "before time_increment");
2099 if (ctx->time_increment_bits == 0 ||
2100 !(show_bits(gb, ctx->time_increment_bits + 1) & 1)) {
2101 /* Headers seem incomplete; try to guess time_increment_bits. */
2102 for (ctx->time_increment_bits = 1;
2103 ctx->time_increment_bits < 16;
2104 ctx->time_increment_bits++) {
2105 if (s->pict_type == AV_PICTURE_TYPE_P ||
2106 (s->pict_type == AV_PICTURE_TYPE_S &&
2107 ctx->vol_sprite_usage == GMC_SPRITE)) {
2108 if ((show_bits(gb, ctx->time_increment_bits + 6) & 0x37) == 0x30)
2110 } else if ((show_bits(gb, ctx->time_increment_bits + 5) & 0x1F) == 0x18)
2116 time_increment = get_bits1(gb); // FIXME investigate further
2118 time_increment = get_bits(gb, ctx->time_increment_bits);
2120 if (s->pict_type != AV_PICTURE_TYPE_B) {
2121 s->last_time_base = s->time_base;
2122 s->time_base += time_incr;
2123 s->time = s->time_base * s->avctx->framerate.num + time_increment;
2124 if (s->workaround_bugs & FF_BUG_UMP4) {
2125 if (s->time < s->last_non_b_time) {
2126 /* header is not mpeg-4-compatible, broken encoder,
2127 * trying to workaround */
2129 s->time += s->avctx->framerate.num;
2132 s->pp_time = s->time - s->last_non_b_time;
2133 s->last_non_b_time = s->time;
2135 s->time = (s->last_time_base + time_incr) * s->avctx->framerate.num + time_increment;
2136 s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
2137 if (s->pp_time <= s->pb_time ||
2138 s->pp_time <= s->pp_time - s->pb_time ||
2140 /* messed up order, maybe after seeking? skipping current b-frame */
2141 return FRAME_SKIPPED;
2143 ff_mpeg4_init_direct_mv(s);
2145 if (ctx->t_frame == 0)
2146 ctx->t_frame = s->pb_time;
2147 if (ctx->t_frame == 0)
2148 ctx->t_frame = 1; // 1/0 protection
2149 s->pp_field_time = (ROUNDED_DIV(s->last_non_b_time, ctx->t_frame) -
2150 ROUNDED_DIV(s->last_non_b_time - s->pp_time, ctx->t_frame)) * 2;
2151 s->pb_field_time = (ROUNDED_DIV(s->time, ctx->t_frame) -
2152 ROUNDED_DIV(s->last_non_b_time - s->pp_time, ctx->t_frame)) * 2;
2153 if (!s->progressive_sequence) {
2154 if (s->pp_field_time <= s->pb_field_time || s->pb_field_time <= 1)
2155 return FRAME_SKIPPED;
2159 check_marker(gb, "before vop_coded");
2162 if (get_bits1(gb) != 1) {
2163 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2164 av_log(s->avctx, AV_LOG_ERROR, "vop not coded\n");
2165 return FRAME_SKIPPED;
2167 if (ctx->shape != BIN_ONLY_SHAPE &&
2168 (s->pict_type == AV_PICTURE_TYPE_P ||
2169 (s->pict_type == AV_PICTURE_TYPE_S &&
2170 ctx->vol_sprite_usage == GMC_SPRITE))) {
2171 /* rounding type for motion estimation */
2172 s->no_rounding = get_bits1(gb);
2176 // FIXME reduced res stuff
2178 if (ctx->shape != RECT_SHAPE) {
2179 if (ctx->vol_sprite_usage != 1 || s->pict_type != AV_PICTURE_TYPE_I) {
2180 skip_bits(gb, 13); /* width */
2181 skip_bits1(gb); /* marker */
2182 skip_bits(gb, 13); /* height */
2183 skip_bits1(gb); /* marker */
2184 skip_bits(gb, 13); /* hor_spat_ref */
2185 skip_bits1(gb); /* marker */
2186 skip_bits(gb, 13); /* ver_spat_ref */
2188 skip_bits1(gb); /* change_CR_disable */
2190 if (get_bits1(gb) != 0)
2191 skip_bits(gb, 8); /* constant_alpha_value */
2194 // FIXME complexity estimation stuff
2196 if (ctx->shape != BIN_ONLY_SHAPE) {
2197 skip_bits_long(gb, ctx->cplx_estimation_trash_i);
2198 if (s->pict_type != AV_PICTURE_TYPE_I)
2199 skip_bits_long(gb, ctx->cplx_estimation_trash_p);
2200 if (s->pict_type == AV_PICTURE_TYPE_B)
2201 skip_bits_long(gb, ctx->cplx_estimation_trash_b);
2203 ctx->intra_dc_threshold = ff_mpeg4_dc_threshold[get_bits(gb, 3)];
2204 if (!s->progressive_sequence) {
2205 s->top_field_first = get_bits1(gb);
2206 s->alternate_scan = get_bits1(gb);
2208 s->alternate_scan = 0;
2211 if (s->alternate_scan) {
2212 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
2213 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
2214 ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan);
2215 ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
2217 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
2218 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
2219 ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan);
2220 ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
2223 if (s->pict_type == AV_PICTURE_TYPE_S &&
2224 (ctx->vol_sprite_usage == STATIC_SPRITE ||
2225 ctx->vol_sprite_usage == GMC_SPRITE)) {
2226 if (mpeg4_decode_sprite_trajectory(ctx, gb) < 0)
2227 return AVERROR_INVALIDDATA;
2228 if (ctx->sprite_brightness_change)
2229 av_log(s->avctx, AV_LOG_ERROR,
2230 "sprite_brightness_change not supported\n");
2231 if (ctx->vol_sprite_usage == STATIC_SPRITE)
2232 av_log(s->avctx, AV_LOG_ERROR, "static sprite not supported\n");
2235 if (ctx->shape != BIN_ONLY_SHAPE) {
2236 s->chroma_qscale = s->qscale = get_bits(gb, s->quant_precision);
2237 if (s->qscale == 0) {
2238 av_log(s->avctx, AV_LOG_ERROR,
2239 "Error, header damaged or not MPEG4 header (qscale=0)\n");
2240 return -1; // makes no sense to continue, as there is nothing left from the image then
2243 if (s->pict_type != AV_PICTURE_TYPE_I) {
2244 s->f_code = get_bits(gb, 3); /* fcode_for */
2245 if (s->f_code == 0) {
2246 av_log(s->avctx, AV_LOG_ERROR,
2247 "Error, header damaged or not MPEG4 header (f_code=0)\n");
2248 return -1; // makes no sense to continue, as there is nothing left from the image then
2253 if (s->pict_type == AV_PICTURE_TYPE_B) {
2254 s->b_code = get_bits(gb, 3);
2258 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2259 av_log(s->avctx, AV_LOG_DEBUG,
2260 "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",
2261 s->qscale, s->f_code, s->b_code,
2262 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")),
2263 gb->size_in_bits, s->progressive_sequence, s->alternate_scan,
2264 s->top_field_first, s->quarter_sample ? "q" : "h",
2265 s->data_partitioning, ctx->resync_marker,
2266 ctx->num_sprite_warping_points, s->sprite_warping_accuracy,
2267 1 - s->no_rounding, s->vo_type,
2268 ctx->vol_control_parameters ? " VOLC" : " ", ctx->intra_dc_threshold,
2269 ctx->cplx_estimation_trash_i, ctx->cplx_estimation_trash_p,
2270 ctx->cplx_estimation_trash_b);
2273 if (!ctx->scalability) {
2274 if (ctx->shape != RECT_SHAPE && s->pict_type != AV_PICTURE_TYPE_I)
2275 skip_bits1(gb); // vop shape coding type
2277 if (ctx->enhancement_type) {
2278 int load_backward_shape = get_bits1(gb);
2279 if (load_backward_shape)
2280 av_log(s->avctx, AV_LOG_ERROR,
2281 "load backward shape isn't supported\n");
2283 skip_bits(gb, 2); // ref_select_code
2286 /* detect buggy encoders which don't set the low_delay flag
2287 * (divx4/xvid/opendivx). Note we cannot detect divx5 without b-frames
2288 * easily (although it's buggy too) */
2289 if (s->vo_type == 0 && ctx->vol_control_parameters == 0 &&
2290 ctx->divx_version == -1 && s->picture_number == 0) {
2291 av_log(s->avctx, AV_LOG_WARNING,
2292 "looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n");
2296 s->picture_number++; // better than pic number==0 always ;)
2298 // FIXME add short header support
2299 s->y_dc_scale_table = ff_mpeg4_y_dc_scale_table;
2300 s->c_dc_scale_table = ff_mpeg4_c_dc_scale_table;
2302 if (s->workaround_bugs & FF_BUG_EDGE) {
2303 s->h_edge_pos = s->width;
2304 s->v_edge_pos = s->height;
2310 * Decode mpeg4 headers.
2311 * @return <0 if no VOP found (or a damaged one)
2312 * FRAME_SKIPPED if a not coded VOP is found
2313 * 0 if a VOP is found
2315 int ff_mpeg4_decode_picture_header(Mpeg4DecContext *ctx, GetBitContext *gb)
2317 MpegEncContext *s = &ctx->m;
2318 unsigned startcode, v;
2320 /* search next start code */
2323 if (s->codec_tag == AV_RL32("WV1F") && show_bits(gb, 24) == 0x575630) {
2325 if (get_bits(gb, 8) == 0xF0)
2331 if (get_bits_count(gb) >= gb->size_in_bits) {
2332 if (gb->size_in_bits == 8 &&
2333 (ctx->divx_version >= 0 || ctx->xvid_build >= 0)) {
2334 av_log(s->avctx, AV_LOG_WARNING, "frame skip %d\n", gb->size_in_bits);
2335 return FRAME_SKIPPED; // divx bug
2337 return -1; // end of stream
2340 /* use the bits after the test */
2341 v = get_bits(gb, 8);
2342 startcode = ((startcode << 8) | v) & 0xffffffff;
2344 if ((startcode & 0xFFFFFF00) != 0x100)
2345 continue; // no startcode
2347 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
2348 av_log(s->avctx, AV_LOG_DEBUG, "startcode: %3X ", startcode);
2349 if (startcode <= 0x11F)
2350 av_log(s->avctx, AV_LOG_DEBUG, "Video Object Start");
2351 else if (startcode <= 0x12F)
2352 av_log(s->avctx, AV_LOG_DEBUG, "Video Object Layer Start");
2353 else if (startcode <= 0x13F)
2354 av_log(s->avctx, AV_LOG_DEBUG, "Reserved");
2355 else if (startcode <= 0x15F)
2356 av_log(s->avctx, AV_LOG_DEBUG, "FGS bp start");
2357 else if (startcode <= 0x1AF)
2358 av_log(s->avctx, AV_LOG_DEBUG, "Reserved");
2359 else if (startcode == 0x1B0)
2360 av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq Start");
2361 else if (startcode == 0x1B1)
2362 av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq End");
2363 else if (startcode == 0x1B2)
2364 av_log(s->avctx, AV_LOG_DEBUG, "User Data");
2365 else if (startcode == 0x1B3)
2366 av_log(s->avctx, AV_LOG_DEBUG, "Group of VOP start");
2367 else if (startcode == 0x1B4)
2368 av_log(s->avctx, AV_LOG_DEBUG, "Video Session Error");
2369 else if (startcode == 0x1B5)
2370 av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Start");
2371 else if (startcode == 0x1B6)
2372 av_log(s->avctx, AV_LOG_DEBUG, "Video Object Plane start");
2373 else if (startcode == 0x1B7)
2374 av_log(s->avctx, AV_LOG_DEBUG, "slice start");
2375 else if (startcode == 0x1B8)
2376 av_log(s->avctx, AV_LOG_DEBUG, "extension start");
2377 else if (startcode == 0x1B9)
2378 av_log(s->avctx, AV_LOG_DEBUG, "fgs start");
2379 else if (startcode == 0x1BA)
2380 av_log(s->avctx, AV_LOG_DEBUG, "FBA Object start");
2381 else if (startcode == 0x1BB)
2382 av_log(s->avctx, AV_LOG_DEBUG, "FBA Object Plane start");
2383 else if (startcode == 0x1BC)
2384 av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object start");
2385 else if (startcode == 0x1BD)
2386 av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object Plane start");
2387 else if (startcode == 0x1BE)
2388 av_log(s->avctx, AV_LOG_DEBUG, "Still Texture Object start");
2389 else if (startcode == 0x1BF)
2390 av_log(s->avctx, AV_LOG_DEBUG, "Texture Spatial Layer start");
2391 else if (startcode == 0x1C0)
2392 av_log(s->avctx, AV_LOG_DEBUG, "Texture SNR Layer start");
2393 else if (startcode == 0x1C1)
2394 av_log(s->avctx, AV_LOG_DEBUG, "Texture Tile start");
2395 else if (startcode == 0x1C2)
2396 av_log(s->avctx, AV_LOG_DEBUG, "Texture Shape Layer start");
2397 else if (startcode == 0x1C3)
2398 av_log(s->avctx, AV_LOG_DEBUG, "stuffing start");
2399 else if (startcode <= 0x1C5)
2400 av_log(s->avctx, AV_LOG_DEBUG, "reserved");
2401 else if (startcode <= 0x1FF)
2402 av_log(s->avctx, AV_LOG_DEBUG, "System start");
2403 av_log(s->avctx, AV_LOG_DEBUG, " at %d\n", get_bits_count(gb));
2406 if (startcode >= 0x120 && startcode <= 0x12F) {
2407 if (decode_vol_header(ctx, gb) < 0)
2409 } else if (startcode == USER_DATA_STARTCODE) {
2410 decode_user_data(ctx, gb);
2411 } else if (startcode == GOP_STARTCODE) {
2412 mpeg4_decode_gop_header(s, gb);
2413 } else if (startcode == VOS_STARTCODE) {
2414 mpeg4_decode_profile_level(s, gb);
2415 } else if (startcode == VOP_STARTCODE) {
2424 if (s->avctx->flags & CODEC_FLAG_LOW_DELAY)
2426 s->avctx->has_b_frames = !s->low_delay;
2428 if (s->workaround_bugs & FF_BUG_AUTODETECT) {
2429 if (s->codec_tag == AV_RL32("XVIX"))
2430 s->workaround_bugs |= FF_BUG_XVID_ILACE;
2432 if (s->codec_tag == AV_RL32("UMP4"))
2433 s->workaround_bugs |= FF_BUG_UMP4;
2435 if (ctx->divx_version >= 500 && ctx->divx_build < 1814)
2436 s->workaround_bugs |= FF_BUG_QPEL_CHROMA;
2438 if (ctx->divx_version > 502 && ctx->divx_build < 1814)
2439 s->workaround_bugs |= FF_BUG_QPEL_CHROMA2;
2441 if (ctx->xvid_build <= 3U)
2442 s->padding_bug_score = 256 * 256 * 256 * 64;
2444 if (ctx->xvid_build <= 1U)
2445 s->workaround_bugs |= FF_BUG_QPEL_CHROMA;
2447 if (ctx->xvid_build <= 12U)
2448 s->workaround_bugs |= FF_BUG_EDGE;
2450 if (ctx->xvid_build <= 32U)
2451 s->workaround_bugs |= FF_BUG_DC_CLIP;
2453 if (ctx->lavc_build < 4653U)
2454 s->workaround_bugs |= FF_BUG_STD_QPEL;
2456 if (ctx->lavc_build < 4655U)
2457 s->workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE;
2459 if (ctx->lavc_build < 4670U)
2460 s->workaround_bugs |= FF_BUG_EDGE;
2462 if (ctx->lavc_build <= 4712U)
2463 s->workaround_bugs |= FF_BUG_DC_CLIP;
2465 if (ctx->divx_version >= 0)
2466 s->workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE;
2468 if (ctx->divx_version == 501 && ctx->divx_build == 20020416)
2469 s->padding_bug_score = 256 * 256 * 256 * 64;
2471 if (ctx->divx_version < 500U)
2472 s->workaround_bugs |= FF_BUG_EDGE;
2474 if (ctx->divx_version >= 0)
2475 s->workaround_bugs |= FF_BUG_HPEL_CHROMA;
2479 if (s->avctx->debug & FF_DEBUG_BUGS)
2480 av_log(s->avctx, AV_LOG_DEBUG,
2481 "bugs: %X lavc_build:%d xvid_build:%d divx_version:%d divx_build:%d %s\n",
2482 s->workaround_bugs, ctx->lavc_build, ctx->xvid_build,
2483 ctx->divx_version, ctx->divx_build, s->divx_packed ? "p" : "");
2485 return decode_vop_header(ctx, gb);
2488 int ff_mpeg4_frame_end(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
2490 Mpeg4DecContext *ctx = avctx->priv_data;
2491 MpegEncContext *s = &ctx->m;
2493 /* divx 5.01+ bistream reorder stuff */
2494 if (s->divx_packed) {
2495 int current_pos = get_bits_count(&s->gb) >> 3;
2496 int startcode_found = 0;
2498 if (buf_size - current_pos > 5) {
2500 for (i = current_pos; i < buf_size - 3; i++)
2504 buf[i + 3] == 0xB6) {
2505 startcode_found = 1;
2509 if (s->gb.buffer == s->bitstream_buffer && buf_size > 7 &&
2510 ctx->xvid_build >= 0) { // xvid style
2511 startcode_found = 1;
2515 if (startcode_found) {
2516 av_fast_malloc(&s->bitstream_buffer,
2517 &s->allocated_bitstream_buffer_size,
2518 buf_size - current_pos +
2519 FF_INPUT_BUFFER_PADDING_SIZE);
2520 if (!s->bitstream_buffer)
2521 return AVERROR(ENOMEM);
2522 memcpy(s->bitstream_buffer, buf + current_pos,
2523 buf_size - current_pos);
2524 s->bitstream_buffer_size = buf_size - current_pos;
2531 static int mpeg4_update_thread_context(AVCodecContext *dst,
2532 const AVCodecContext *src)
2534 Mpeg4DecContext *s = dst->priv_data;
2535 const Mpeg4DecContext *s1 = src->priv_data;
2536 int init = s->m.context_initialized;
2538 int ret = ff_mpeg_update_thread_context(dst, src);
2543 if (CONFIG_MPEG4_DECODER && !init && s1->xvid_build >= 0)
2544 ff_xvid_idct_init(&s->m.idsp, dst);
2546 s->shape = s1->shape;
2547 s->time_increment_bits = s1->time_increment_bits;
2548 s->xvid_build = s1->xvid_build;
2553 static av_cold int decode_init(AVCodecContext *avctx)
2555 Mpeg4DecContext *ctx = avctx->priv_data;
2556 MpegEncContext *s = &ctx->m;
2558 static int done = 0;
2563 ctx->lavc_build = -1;
2565 if ((ret = ff_h263_decode_init(avctx)) < 0)
2571 ff_rl_init(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
2572 ff_rl_init(&ff_rvlc_rl_inter, ff_mpeg4_static_rl_table_store[1]);
2573 ff_rl_init(&ff_rvlc_rl_intra, ff_mpeg4_static_rl_table_store[2]);
2574 INIT_VLC_RL(ff_mpeg4_rl_intra, 554);
2575 INIT_VLC_RL(ff_rvlc_rl_inter, 1072);
2576 INIT_VLC_RL(ff_rvlc_rl_intra, 1072);
2577 INIT_VLC_STATIC(&dc_lum, DC_VLC_BITS, 10 /* 13 */,
2578 &ff_mpeg4_DCtab_lum[0][1], 2, 1,
2579 &ff_mpeg4_DCtab_lum[0][0], 2, 1, 512);
2580 INIT_VLC_STATIC(&dc_chrom, DC_VLC_BITS, 10 /* 13 */,
2581 &ff_mpeg4_DCtab_chrom[0][1], 2, 1,
2582 &ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512);
2583 INIT_VLC_STATIC(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15,
2584 &ff_sprite_trajectory_tab[0][1], 4, 2,
2585 &ff_sprite_trajectory_tab[0][0], 4, 2, 128);
2586 INIT_VLC_STATIC(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4,
2587 &ff_mb_type_b_tab[0][1], 2, 1,
2588 &ff_mb_type_b_tab[0][0], 2, 1, 16);
2592 s->low_delay = 0; /* default, might be overriden in the vol header during header parsing */
2593 s->decode_mb = mpeg4_decode_mb;
2594 ctx->time_increment_bits = 4; /* default value for broken headers */
2596 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
2597 avctx->internal->allocate_progress = 1;
2602 static const AVProfile mpeg4_video_profiles[] = {
2603 { FF_PROFILE_MPEG4_SIMPLE, "Simple Profile" },
2604 { FF_PROFILE_MPEG4_SIMPLE_SCALABLE, "Simple Scalable Profile" },
2605 { FF_PROFILE_MPEG4_CORE, "Core Profile" },
2606 { FF_PROFILE_MPEG4_MAIN, "Main Profile" },
2607 { FF_PROFILE_MPEG4_N_BIT, "N-bit Profile" },
2608 { FF_PROFILE_MPEG4_SCALABLE_TEXTURE, "Scalable Texture Profile" },
2609 { FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION, "Simple Face Animation Profile" },
2610 { FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE, "Basic Animated Texture Profile" },
2611 { FF_PROFILE_MPEG4_HYBRID, "Hybrid Profile" },
2612 { FF_PROFILE_MPEG4_ADVANCED_REAL_TIME, "Advanced Real Time Simple Profile" },
2613 { FF_PROFILE_MPEG4_CORE_SCALABLE, "Code Scalable Profile" },
2614 { FF_PROFILE_MPEG4_ADVANCED_CODING, "Advanced Coding Profile" },
2615 { FF_PROFILE_MPEG4_ADVANCED_CORE, "Advanced Core Profile" },
2616 { FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE, "Advanced Scalable Texture Profile" },
2617 { FF_PROFILE_MPEG4_SIMPLE_STUDIO, "Simple Studio Profile" },
2618 { FF_PROFILE_MPEG4_ADVANCED_SIMPLE, "Advanced Simple Profile" },
2621 AVCodec ff_mpeg4_decoder = {
2623 .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
2624 .type = AVMEDIA_TYPE_VIDEO,
2625 .id = AV_CODEC_ID_MPEG4,
2626 .priv_data_size = sizeof(Mpeg4DecContext),
2627 .init = decode_init,
2628 .close = ff_h263_decode_end,
2629 .decode = ff_h263_decode_frame,
2630 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
2631 CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
2632 CODEC_CAP_FRAME_THREADS,
2633 .flush = ff_mpeg_flush,
2634 .pix_fmts = ff_h263_hwaccel_pixfmt_list_420,
2635 .profiles = NULL_IF_CONFIG_SMALL(mpeg4_video_profiles),
2636 .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg4_update_thread_context),