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, 2 * s->qscale, (s->qscale - 1) | 1);
238 static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr)
240 MpegEncContext *const s = &w->s;
243 ret = ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr);
248 if ((((*mx_ptr) | (*my_ptr)) & 1) && s->mspel)
249 w->hshift = get_bits1(&s->gb);
256 static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py)
258 MpegEncContext *const s = &w->s;
259 int xy, wrap, diff, type;
260 int16_t *A, *B, *C, *mot_val;
263 xy = s->block_index[0];
265 mot_val = s->current_picture.motion_val[0][xy];
267 A = s->current_picture.motion_val[0][xy - 1];
268 B = s->current_picture.motion_val[0][xy - wrap];
269 C = s->current_picture.motion_val[0][xy + 2 - wrap];
271 if (s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
272 diff = FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
277 type = get_bits1(&s->gb);
284 } else if (type == 1) {
288 /* special case for first (slice) line */
289 if (s->first_slice_line) {
293 *px = mid_pred(A[0], B[0], C[0]);
294 *py = mid_pred(A[1], B[1], C[1]);
301 static inline int wmv2_decode_inter_block(Wmv2Context *w, int16_t *block,
304 MpegEncContext *const s = &w->s;
305 static const int sub_cbp_table[3] = { 2, 3, 1 };
309 s->block_last_index[n] = -1;
313 if (w->per_block_abt)
314 w->abt_type = decode012(&s->gb);
315 w->abt_type_table[n] = w->abt_type;
318 // const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].permutated;
319 const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].scantable;
320 // const uint8_t *scantable = w->abt_type - 1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
322 sub_cbp = sub_cbp_table[decode012(&s->gb)];
325 if ((ret = ff_msmpeg4_decode_block(s, block, n, 1, scantable)) < 0)
329 if ((ret = ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable)) < 0)
332 s->block_last_index[n] = 63;
336 return ff_msmpeg4_decode_block(s, block, n, 1,
337 s->inter_scantable.permutated);
341 int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64])
343 Wmv2Context *const w = (Wmv2Context *) s;
344 int cbp, code, i, ret;
350 if (s->pict_type == AV_PICTURE_TYPE_P) {
351 if (IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])) {
354 for (i = 0; i < 6; i++)
355 s->block_last_index[i] = -1;
356 s->mv_dir = MV_DIR_FORWARD;
357 s->mv_type = MV_TYPE_16X16;
365 code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table,
366 MB_NON_INTRA_VLC_BITS, 3);
368 return AVERROR_INVALIDDATA;
369 s->mb_intra = (~code & 0x40) >> 6;
374 code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
376 av_log(s->avctx, AV_LOG_ERROR,
377 "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
378 return AVERROR_INVALIDDATA;
380 /* predict coded block pattern */
382 for (i = 0; i < 6; i++) {
383 int val = ((code >> (5 - i)) & 1);
385 int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
389 cbp |= val << (5 - i);
395 wmv2_pred_motion(w, &mx, &my);
398 s->bdsp.clear_blocks(s->block[0]);
399 if (s->per_mb_rl_table) {
400 s->rl_table_index = decode012(&s->gb);
401 s->rl_chroma_table_index = s->rl_table_index;
404 if (w->abt_flag && w->per_mb_abt) {
405 w->per_block_abt = get_bits1(&s->gb);
406 if (!w->per_block_abt)
407 w->abt_type = decode012(&s->gb);
409 w->per_block_abt = 0;
412 if ((ret = wmv2_decode_motion(w, &mx, &my)) < 0)
415 s->mv_dir = MV_DIR_FORWARD;
416 s->mv_type = MV_TYPE_16X16;
420 for (i = 0; i < 6; i++) {
421 if ((ret = wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1)) < 0) {
422 av_log(s->avctx, AV_LOG_ERROR,
423 "\nerror while decoding inter block: %d x %d (%d)\n",
424 s->mb_x, s->mb_y, i);
429 if (s->pict_type == AV_PICTURE_TYPE_P)
430 ff_dlog(s->avctx, "%d%d ", s->inter_intra_pred, cbp);
431 ff_dlog(s->avctx, "I at %d %d %d %06X\n", s->mb_x, s->mb_y,
432 ((cbp & 3) ? 1 : 0) + ((cbp & 0x3C) ? 2 : 0),
433 show_bits(&s->gb, 24));
434 s->ac_pred = get_bits1(&s->gb);
435 if (s->inter_intra_pred) {
436 s->h263_aic_dir = get_vlc2(&s->gb, ff_inter_intra_vlc.table,
437 INTER_INTRA_VLC_BITS, 1);
438 ff_dlog(s->avctx, "%d%d %d %d/",
439 s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
441 if (s->per_mb_rl_table && cbp) {
442 s->rl_table_index = decode012(&s->gb);
443 s->rl_chroma_table_index = s->rl_table_index;
446 s->bdsp.clear_blocks(s->block[0]);
447 for (i = 0; i < 6; i++) {
448 if ((ret = ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL)) < 0) {
449 av_log(s->avctx, AV_LOG_ERROR,
450 "\nerror while decoding intra block: %d x %d (%d)\n",
451 s->mb_x, s->mb_y, i);
460 static av_cold int wmv2_decode_init(AVCodecContext *avctx)
462 Wmv2Context *const w = avctx->priv_data;
465 if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
468 ff_wmv2_common_init(w);
470 ff_intrax8_common_init(&w->x8, &w->s);
475 static av_cold int wmv2_decode_end(AVCodecContext *avctx)
477 Wmv2Context *w = avctx->priv_data;
479 ff_intrax8_common_end(&w->x8);
480 return ff_h263_decode_end(avctx);
483 AVCodec ff_wmv2_decoder = {
485 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
486 .type = AVMEDIA_TYPE_VIDEO,
487 .id = AV_CODEC_ID_WMV2,
488 .priv_data_size = sizeof(Wmv2Context),
489 .init = wmv2_decode_init,
490 .close = wmv2_decode_end,
491 .decode = ff_h263_decode_frame,
492 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
493 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,