2 * Copyright (c) 2002 The Libav Project
4 * This file is part of Libav.
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #include "mpegutils.h"
27 #include "mpegvideo.h"
29 #include "msmpeg4data.h"
33 static void parse_mb_skip(Wmv2Context *w)
36 MpegEncContext *const s = &w->s;
37 uint32_t *const mb_type = s->current_picture_ptr->mb_type;
39 w->skip_type = get_bits(&s->gb, 2);
40 switch (w->skip_type) {
42 for (mb_y = 0; mb_y < s->mb_height; mb_y++)
43 for (mb_x = 0; mb_x < s->mb_width; mb_x++)
44 mb_type[mb_y * s->mb_stride + mb_x] =
45 MB_TYPE_16x16 | MB_TYPE_L0;
48 for (mb_y = 0; mb_y < s->mb_height; mb_y++)
49 for (mb_x = 0; mb_x < s->mb_width; mb_x++)
50 mb_type[mb_y * s->mb_stride + mb_x] =
51 (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
54 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
55 if (get_bits1(&s->gb)) {
56 for (mb_x = 0; mb_x < s->mb_width; mb_x++)
57 mb_type[mb_y * s->mb_stride + mb_x] =
58 MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
60 for (mb_x = 0; mb_x < s->mb_width; mb_x++)
61 mb_type[mb_y * s->mb_stride + mb_x] =
62 (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
67 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
68 if (get_bits1(&s->gb)) {
69 for (mb_y = 0; mb_y < s->mb_height; mb_y++)
70 mb_type[mb_y * s->mb_stride + mb_x] =
71 MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
73 for (mb_y = 0; mb_y < s->mb_height; mb_y++)
74 mb_type[mb_y * s->mb_stride + mb_x] =
75 (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
82 static int decode_ext_header(Wmv2Context *w)
84 MpegEncContext *const s = &w->s;
89 if (s->avctx->extradata_size < 4)
90 return AVERROR_INVALIDDATA;
92 init_get_bits(&gb, s->avctx->extradata, 32);
94 fps = get_bits(&gb, 5);
95 s->bit_rate = get_bits(&gb, 11) * 1024;
96 w->mspel_bit = get_bits1(&gb);
97 s->loop_filter = get_bits1(&gb);
98 w->abt_flag = get_bits1(&gb);
99 w->j_type_bit = get_bits1(&gb);
100 w->top_left_mv_flag = get_bits1(&gb);
101 w->per_mb_rl_bit = get_bits1(&gb);
102 code = get_bits(&gb, 3);
105 return AVERROR_INVALIDDATA;
107 s->slice_height = s->mb_height / code;
109 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
110 av_log(s->avctx, AV_LOG_DEBUG,
111 "fps:%d, br:%d, qpbit:%d, abt_flag:%d, j_type_bit:%d, "
112 "tl_mv_flag:%d, mbrl_bit:%d, code:%d, loop_filter:%d, "
114 fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit,
115 w->top_left_mv_flag, w->per_mb_rl_bit, code, s->loop_filter,
120 int ff_wmv2_decode_picture_header(MpegEncContext *s)
122 Wmv2Context *const w = (Wmv2Context *) s;
125 if (s->picture_number == 0)
126 decode_ext_header(w);
128 s->pict_type = get_bits1(&s->gb) + 1;
129 if (s->pict_type == AV_PICTURE_TYPE_I) {
130 code = get_bits(&s->gb, 7);
131 av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
133 s->chroma_qscale = s->qscale = get_bits(&s->gb, 5);
135 return AVERROR_INVALIDDATA;
140 int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s)
142 Wmv2Context *const w = (Wmv2Context *) s;
144 if (s->pict_type == AV_PICTURE_TYPE_I) {
146 w->j_type = get_bits1(&s->gb);
148 w->j_type = 0; // FIXME check
151 if (w->per_mb_rl_bit)
152 s->per_mb_rl_table = get_bits1(&s->gb);
154 s->per_mb_rl_table = 0;
156 if (!s->per_mb_rl_table) {
157 s->rl_chroma_table_index = decode012(&s->gb);
158 s->rl_table_index = decode012(&s->gb);
161 s->dc_table_index = get_bits1(&s->gb);
163 s->inter_intra_pred = 0;
165 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
166 av_log(s->avctx, AV_LOG_DEBUG,
167 "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
168 s->qscale, s->rl_chroma_table_index, s->rl_table_index,
169 s->dc_table_index, s->per_mb_rl_table, w->j_type);
176 cbp_index = decode012(&s->gb);
177 if (s->qscale <= 10) {
178 int map[3] = { 0, 2, 1 };
179 w->cbp_table_index = map[cbp_index];
180 } else if (s->qscale <= 20) {
181 int map[3] = { 1, 0, 2 };
182 w->cbp_table_index = map[cbp_index];
184 int map[3] = {2,1,0};
185 w->cbp_table_index = map[cbp_index];
189 s->mspel = get_bits1(&s->gb);
191 s->mspel = 0; // FIXME check
194 w->per_mb_abt = get_bits1(&s->gb) ^ 1;
196 w->abt_type = decode012(&s->gb);
199 if (w->per_mb_rl_bit)
200 s->per_mb_rl_table = get_bits1(&s->gb);
202 s->per_mb_rl_table = 0;
204 if (!s->per_mb_rl_table) {
205 s->rl_table_index = decode012(&s->gb);
206 s->rl_chroma_table_index = s->rl_table_index;
209 s->dc_table_index = get_bits1(&s->gb);
210 s->mv_table_index = get_bits1(&s->gb);
212 s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
215 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
216 av_log(s->avctx, AV_LOG_DEBUG,
217 "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d "
218 "per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n",
219 s->rl_table_index, s->rl_chroma_table_index,
220 s->dc_table_index, s->mv_table_index,
221 s->per_mb_rl_table, s->qscale, s->mspel,
222 w->per_mb_abt, w->abt_type, w->cbp_table_index,
223 s->inter_intra_pred);
226 s->esc3_level_length = 0;
227 s->esc3_run_length = 0;
228 s->picture_number++; // FIXME ?
231 ff_intrax8_decode_picture(&w->x8, &s->current_picture,
232 &s->gb, &s->mb_x, &s->mb_y,
233 2 * s->qscale, (s->qscale - 1) | 1,
234 s->loop_filter, s->low_delay);
236 ff_er_add_slice(&w->s.er, 0, 0,
237 (w->s.mb_x >> 1) - 1, (w->s.mb_y >> 1) - 1,
245 static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr)
247 MpegEncContext *const s = &w->s;
250 ret = ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr);
255 if ((((*mx_ptr) | (*my_ptr)) & 1) && s->mspel)
256 w->hshift = get_bits1(&s->gb);
263 static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py)
265 MpegEncContext *const s = &w->s;
266 int xy, wrap, diff, type;
267 int16_t *A, *B, *C, *mot_val;
270 xy = s->block_index[0];
272 mot_val = s->current_picture.motion_val[0][xy];
274 A = s->current_picture.motion_val[0][xy - 1];
275 B = s->current_picture.motion_val[0][xy - wrap];
276 C = s->current_picture.motion_val[0][xy + 2 - wrap];
278 if (s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
279 diff = FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
284 type = get_bits1(&s->gb);
291 } else if (type == 1) {
295 /* special case for first (slice) line */
296 if (s->first_slice_line) {
300 *px = mid_pred(A[0], B[0], C[0]);
301 *py = mid_pred(A[1], B[1], C[1]);
308 static inline int wmv2_decode_inter_block(Wmv2Context *w, int16_t *block,
311 MpegEncContext *const s = &w->s;
312 static const int sub_cbp_table[3] = { 2, 3, 1 };
316 s->block_last_index[n] = -1;
320 if (w->per_block_abt)
321 w->abt_type = decode012(&s->gb);
322 w->abt_type_table[n] = w->abt_type;
325 // const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].permutated;
326 const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].scantable;
327 // const uint8_t *scantable = w->abt_type - 1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
329 sub_cbp = sub_cbp_table[decode012(&s->gb)];
332 if ((ret = ff_msmpeg4_decode_block(s, block, n, 1, scantable)) < 0)
336 if ((ret = ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable)) < 0)
339 s->block_last_index[n] = 63;
343 return ff_msmpeg4_decode_block(s, block, n, 1,
344 s->inter_scantable.permutated);
348 int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64])
350 Wmv2Context *const w = (Wmv2Context *) s;
351 int cbp, code, i, ret;
357 if (s->pict_type == AV_PICTURE_TYPE_P) {
358 if (IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])) {
361 for (i = 0; i < 6; i++)
362 s->block_last_index[i] = -1;
363 s->mv_dir = MV_DIR_FORWARD;
364 s->mv_type = MV_TYPE_16X16;
372 code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table,
373 MB_NON_INTRA_VLC_BITS, 3);
375 return AVERROR_INVALIDDATA;
376 s->mb_intra = (~code & 0x40) >> 6;
381 code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
383 av_log(s->avctx, AV_LOG_ERROR,
384 "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
385 return AVERROR_INVALIDDATA;
387 /* predict coded block pattern */
389 for (i = 0; i < 6; i++) {
390 int val = ((code >> (5 - i)) & 1);
392 int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
396 cbp |= val << (5 - i);
402 wmv2_pred_motion(w, &mx, &my);
405 s->bdsp.clear_blocks(s->block[0]);
406 if (s->per_mb_rl_table) {
407 s->rl_table_index = decode012(&s->gb);
408 s->rl_chroma_table_index = s->rl_table_index;
411 if (w->abt_flag && w->per_mb_abt) {
412 w->per_block_abt = get_bits1(&s->gb);
413 if (!w->per_block_abt)
414 w->abt_type = decode012(&s->gb);
416 w->per_block_abt = 0;
419 if ((ret = wmv2_decode_motion(w, &mx, &my)) < 0)
422 s->mv_dir = MV_DIR_FORWARD;
423 s->mv_type = MV_TYPE_16X16;
427 for (i = 0; i < 6; i++) {
428 if ((ret = wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1)) < 0) {
429 av_log(s->avctx, AV_LOG_ERROR,
430 "\nerror while decoding inter block: %d x %d (%d)\n",
431 s->mb_x, s->mb_y, i);
436 if (s->pict_type == AV_PICTURE_TYPE_P)
437 ff_dlog(s->avctx, "%d%d ", s->inter_intra_pred, cbp);
438 ff_dlog(s->avctx, "I at %d %d %d %06X\n", s->mb_x, s->mb_y,
439 ((cbp & 3) ? 1 : 0) + ((cbp & 0x3C) ? 2 : 0),
440 show_bits(&s->gb, 24));
441 s->ac_pred = get_bits1(&s->gb);
442 if (s->inter_intra_pred) {
443 s->h263_aic_dir = get_vlc2(&s->gb, ff_inter_intra_vlc.table,
444 INTER_INTRA_VLC_BITS, 1);
445 ff_dlog(s->avctx, "%d%d %d %d/",
446 s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
448 if (s->per_mb_rl_table && cbp) {
449 s->rl_table_index = decode012(&s->gb);
450 s->rl_chroma_table_index = s->rl_table_index;
453 s->bdsp.clear_blocks(s->block[0]);
454 for (i = 0; i < 6; i++) {
455 if ((ret = ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL)) < 0) {
456 av_log(s->avctx, AV_LOG_ERROR,
457 "\nerror while decoding intra block: %d x %d (%d)\n",
458 s->mb_x, s->mb_y, i);
467 static av_cold int wmv2_decode_init(AVCodecContext *avctx)
469 Wmv2Context *const w = avctx->priv_data;
472 if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
475 ff_wmv2_common_init(w);
477 return ff_intrax8_common_init(avctx, &w->x8, &w->s.idsp,
478 w->s.block, w->s.block_last_index,
479 w->s.mb_width, w->s.mb_height);
482 static av_cold int wmv2_decode_end(AVCodecContext *avctx)
484 Wmv2Context *w = avctx->priv_data;
486 ff_intrax8_common_end(&w->x8);
487 return ff_h263_decode_end(avctx);
490 AVCodec ff_wmv2_decoder = {
492 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
493 .type = AVMEDIA_TYPE_VIDEO,
494 .id = AV_CODEC_ID_WMV2,
495 .priv_data_size = sizeof(Wmv2Context),
496 .init = wmv2_decode_init,
497 .close = wmv2_decode_end,
498 .decode = ff_h263_decode_frame,
499 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1,
500 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,