2 * Copyright (c) 2002 The FFmpeg Project
4 * This file is part of FFmpeg.
6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 w->cbp_table_index = wmv2_get_cbp_table_index(s, cbp_index);
180 s->mspel = get_bits1(&s->gb);
182 s->mspel = 0; // FIXME check
185 w->per_mb_abt = get_bits1(&s->gb) ^ 1;
187 w->abt_type = decode012(&s->gb);
190 if (w->per_mb_rl_bit)
191 s->per_mb_rl_table = get_bits1(&s->gb);
193 s->per_mb_rl_table = 0;
195 if (!s->per_mb_rl_table) {
196 s->rl_table_index = decode012(&s->gb);
197 s->rl_chroma_table_index = s->rl_table_index;
200 s->dc_table_index = get_bits1(&s->gb);
201 s->mv_table_index = get_bits1(&s->gb);
203 s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
206 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
207 av_log(s->avctx, AV_LOG_DEBUG,
208 "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d "
209 "per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n",
210 s->rl_table_index, s->rl_chroma_table_index,
211 s->dc_table_index, s->mv_table_index,
212 s->per_mb_rl_table, s->qscale, s->mspel,
213 w->per_mb_abt, w->abt_type, w->cbp_table_index,
214 s->inter_intra_pred);
217 s->esc3_level_length = 0;
218 s->esc3_run_length = 0;
219 s->picture_number++; // FIXME ?
222 ff_intrax8_decode_picture(&w->x8, 2 * s->qscale, (s->qscale - 1) | 1);
229 static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr)
231 MpegEncContext *const s = &w->s;
234 ret = ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr);
239 if ((((*mx_ptr) | (*my_ptr)) & 1) && s->mspel)
240 w->hshift = get_bits1(&s->gb);
247 static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py)
249 MpegEncContext *const s = &w->s;
250 int xy, wrap, diff, type;
251 int16_t *A, *B, *C, *mot_val;
254 xy = s->block_index[0];
256 mot_val = s->current_picture.motion_val[0][xy];
258 A = s->current_picture.motion_val[0][xy - 1];
259 B = s->current_picture.motion_val[0][xy - wrap];
260 C = s->current_picture.motion_val[0][xy + 2 - wrap];
262 if (s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
263 diff = FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
268 type = get_bits1(&s->gb);
275 } else if (type == 1) {
279 /* special case for first (slice) line */
280 if (s->first_slice_line) {
284 *px = mid_pred(A[0], B[0], C[0]);
285 *py = mid_pred(A[1], B[1], C[1]);
292 static inline int wmv2_decode_inter_block(Wmv2Context *w, int16_t *block,
295 MpegEncContext *const s = &w->s;
296 static const int sub_cbp_table[3] = { 2, 3, 1 };
300 s->block_last_index[n] = -1;
304 if (w->per_block_abt)
305 w->abt_type = decode012(&s->gb);
306 w->abt_type_table[n] = w->abt_type;
309 // const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].permutated;
310 const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].scantable;
311 // const uint8_t *scantable = w->abt_type - 1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
313 sub_cbp = sub_cbp_table[decode012(&s->gb)];
316 if ((ret = ff_msmpeg4_decode_block(s, block, n, 1, scantable)) < 0)
320 if ((ret = ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable)) < 0)
323 s->block_last_index[n] = 63;
327 return ff_msmpeg4_decode_block(s, block, n, 1,
328 s->inter_scantable.permutated);
332 int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64])
334 Wmv2Context *const w = (Wmv2Context *) s;
335 int cbp, code, i, ret;
341 if (s->pict_type == AV_PICTURE_TYPE_P) {
342 if (IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])) {
345 for (i = 0; i < 6; i++)
346 s->block_last_index[i] = -1;
347 s->mv_dir = MV_DIR_FORWARD;
348 s->mv_type = MV_TYPE_16X16;
356 code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table,
357 MB_NON_INTRA_VLC_BITS, 3);
359 return AVERROR_INVALIDDATA;
360 s->mb_intra = (~code & 0x40) >> 6;
365 code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
367 av_log(s->avctx, AV_LOG_ERROR,
368 "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
369 return AVERROR_INVALIDDATA;
371 /* predict coded block pattern */
373 for (i = 0; i < 6; i++) {
374 int val = ((code >> (5 - i)) & 1);
376 int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
380 cbp |= val << (5 - i);
386 wmv2_pred_motion(w, &mx, &my);
389 s->bdsp.clear_blocks(s->block[0]);
390 if (s->per_mb_rl_table) {
391 s->rl_table_index = decode012(&s->gb);
392 s->rl_chroma_table_index = s->rl_table_index;
395 if (w->abt_flag && w->per_mb_abt) {
396 w->per_block_abt = get_bits1(&s->gb);
397 if (!w->per_block_abt)
398 w->abt_type = decode012(&s->gb);
400 w->per_block_abt = 0;
403 if ((ret = wmv2_decode_motion(w, &mx, &my)) < 0)
406 s->mv_dir = MV_DIR_FORWARD;
407 s->mv_type = MV_TYPE_16X16;
411 for (i = 0; i < 6; i++) {
412 if ((ret = wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1)) < 0) {
413 av_log(s->avctx, AV_LOG_ERROR,
414 "\nerror while decoding inter block: %d x %d (%d)\n",
415 s->mb_x, s->mb_y, i);
420 if (s->pict_type == AV_PICTURE_TYPE_P)
421 ff_dlog(s->avctx, "%d%d ", s->inter_intra_pred, cbp);
422 ff_dlog(s->avctx, "I at %d %d %d %06X\n", s->mb_x, s->mb_y,
423 ((cbp & 3) ? 1 : 0) + ((cbp & 0x3C) ? 2 : 0),
424 show_bits(&s->gb, 24));
425 s->ac_pred = get_bits1(&s->gb);
426 if (s->inter_intra_pred) {
427 s->h263_aic_dir = get_vlc2(&s->gb, ff_inter_intra_vlc.table,
428 INTER_INTRA_VLC_BITS, 1);
429 ff_dlog(s->avctx, "%d%d %d %d/",
430 s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
432 if (s->per_mb_rl_table && cbp) {
433 s->rl_table_index = decode012(&s->gb);
434 s->rl_chroma_table_index = s->rl_table_index;
437 s->bdsp.clear_blocks(s->block[0]);
438 for (i = 0; i < 6; i++) {
439 if ((ret = ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL)) < 0) {
440 av_log(s->avctx, AV_LOG_ERROR,
441 "\nerror while decoding intra block: %d x %d (%d)\n",
442 s->mb_x, s->mb_y, i);
451 static av_cold int wmv2_decode_init(AVCodecContext *avctx)
453 Wmv2Context *const w = avctx->priv_data;
456 avctx->flags |= CODEC_FLAG_EMU_EDGE;
458 if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
461 ff_wmv2_common_init(w);
463 ff_intrax8_common_init(&w->x8, &w->s);
468 static av_cold int wmv2_decode_end(AVCodecContext *avctx)
470 Wmv2Context *w = avctx->priv_data;
472 ff_intrax8_common_end(&w->x8);
473 return ff_h263_decode_end(avctx);
476 AVCodec ff_wmv2_decoder = {
478 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
479 .type = AVMEDIA_TYPE_VIDEO,
480 .id = AV_CODEC_ID_WMV2,
481 .priv_data_size = sizeof(Wmv2Context),
482 .init = wmv2_decode_init,
483 .close = wmv2_decode_end,
484 .decode = ff_h263_decode_frame,
485 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
486 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,