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
25 #include "mpegutils.h"
26 #include "mpegvideo.h"
28 #include "msmpeg4data.h"
32 static void parse_mb_skip(Wmv2Context *w)
35 MpegEncContext *const s = &w->s;
36 uint32_t *const mb_type = s->current_picture_ptr->mb_type;
38 w->skip_type = get_bits(&s->gb, 2);
39 switch (w->skip_type) {
41 for (mb_y = 0; mb_y < s->mb_height; mb_y++)
42 for (mb_x = 0; mb_x < s->mb_width; mb_x++)
43 mb_type[mb_y * s->mb_stride + mb_x] =
44 MB_TYPE_16x16 | MB_TYPE_L0;
47 for (mb_y = 0; mb_y < s->mb_height; mb_y++)
48 for (mb_x = 0; mb_x < s->mb_width; mb_x++)
49 mb_type[mb_y * s->mb_stride + mb_x] =
50 (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
53 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
54 if (get_bits1(&s->gb)) {
55 for (mb_x = 0; mb_x < s->mb_width; mb_x++)
56 mb_type[mb_y * s->mb_stride + mb_x] =
57 MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
59 for (mb_x = 0; mb_x < s->mb_width; mb_x++)
60 mb_type[mb_y * s->mb_stride + mb_x] =
61 (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
66 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
67 if (get_bits1(&s->gb)) {
68 for (mb_y = 0; mb_y < s->mb_height; mb_y++)
69 mb_type[mb_y * s->mb_stride + mb_x] =
70 MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
72 for (mb_y = 0; mb_y < s->mb_height; mb_y++)
73 mb_type[mb_y * s->mb_stride + mb_x] =
74 (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
81 static int decode_ext_header(Wmv2Context *w)
83 MpegEncContext *const s = &w->s;
88 if (s->avctx->extradata_size < 4)
89 return AVERROR_INVALIDDATA;
91 init_get_bits(&gb, s->avctx->extradata, 32);
93 fps = get_bits(&gb, 5);
94 s->bit_rate = get_bits(&gb, 11) * 1024;
95 w->mspel_bit = get_bits1(&gb);
96 s->loop_filter = get_bits1(&gb);
97 w->abt_flag = get_bits1(&gb);
98 w->j_type_bit = get_bits1(&gb);
99 w->top_left_mv_flag = get_bits1(&gb);
100 w->per_mb_rl_bit = get_bits1(&gb);
101 code = get_bits(&gb, 3);
104 return AVERROR_INVALIDDATA;
106 s->slice_height = s->mb_height / code;
108 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
109 av_log(s->avctx, AV_LOG_DEBUG,
110 "fps:%d, br:%d, qpbit:%d, abt_flag:%d, j_type_bit:%d, "
111 "tl_mv_flag:%d, mbrl_bit:%d, code:%d, loop_filter:%d, "
113 fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit,
114 w->top_left_mv_flag, w->per_mb_rl_bit, code, s->loop_filter,
119 int ff_wmv2_decode_picture_header(MpegEncContext *s)
121 Wmv2Context *const w = (Wmv2Context *) s;
124 if (s->picture_number == 0)
125 decode_ext_header(w);
127 s->pict_type = get_bits1(&s->gb) + 1;
128 if (s->pict_type == AV_PICTURE_TYPE_I) {
129 code = get_bits(&s->gb, 7);
130 av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
132 s->chroma_qscale = s->qscale = get_bits(&s->gb, 5);
134 return AVERROR_INVALIDDATA;
139 int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s)
141 Wmv2Context *const w = (Wmv2Context *) s;
143 if (s->pict_type == AV_PICTURE_TYPE_I) {
145 w->j_type = get_bits1(&s->gb);
147 w->j_type = 0; // FIXME check
150 if (w->per_mb_rl_bit)
151 s->per_mb_rl_table = get_bits1(&s->gb);
153 s->per_mb_rl_table = 0;
155 if (!s->per_mb_rl_table) {
156 s->rl_chroma_table_index = decode012(&s->gb);
157 s->rl_table_index = decode012(&s->gb);
160 s->dc_table_index = get_bits1(&s->gb);
162 s->inter_intra_pred = 0;
164 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
165 av_log(s->avctx, AV_LOG_DEBUG,
166 "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
167 s->qscale, s->rl_chroma_table_index, s->rl_table_index,
168 s->dc_table_index, s->per_mb_rl_table, w->j_type);
175 cbp_index = decode012(&s->gb);
176 w->cbp_table_index = wmv2_get_cbp_table_index(s, cbp_index);
179 s->mspel = get_bits1(&s->gb);
181 s->mspel = 0; // FIXME check
184 w->per_mb_abt = get_bits1(&s->gb) ^ 1;
186 w->abt_type = decode012(&s->gb);
189 if (w->per_mb_rl_bit)
190 s->per_mb_rl_table = get_bits1(&s->gb);
192 s->per_mb_rl_table = 0;
194 if (!s->per_mb_rl_table) {
195 s->rl_table_index = decode012(&s->gb);
196 s->rl_chroma_table_index = s->rl_table_index;
199 s->dc_table_index = get_bits1(&s->gb);
200 s->mv_table_index = get_bits1(&s->gb);
202 s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
205 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
206 av_log(s->avctx, AV_LOG_DEBUG,
207 "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d "
208 "per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n",
209 s->rl_table_index, s->rl_chroma_table_index,
210 s->dc_table_index, s->mv_table_index,
211 s->per_mb_rl_table, s->qscale, s->mspel,
212 w->per_mb_abt, w->abt_type, w->cbp_table_index,
213 s->inter_intra_pred);
216 s->esc3_level_length = 0;
217 s->esc3_run_length = 0;
218 s->picture_number++; // FIXME ?
221 ff_intrax8_decode_picture(&w->x8, 2 * s->qscale, (s->qscale - 1) | 1);
228 static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr)
230 MpegEncContext *const s = &w->s;
233 ret = ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr);
238 if ((((*mx_ptr) | (*my_ptr)) & 1) && s->mspel)
239 w->hshift = get_bits1(&s->gb);
246 static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py)
248 MpegEncContext *const s = &w->s;
249 int xy, wrap, diff, type;
250 int16_t *A, *B, *C, *mot_val;
253 xy = s->block_index[0];
255 mot_val = s->current_picture.motion_val[0][xy];
257 A = s->current_picture.motion_val[0][xy - 1];
258 B = s->current_picture.motion_val[0][xy - wrap];
259 C = s->current_picture.motion_val[0][xy + 2 - wrap];
261 if (s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
262 diff = FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
267 type = get_bits1(&s->gb);
274 } else if (type == 1) {
278 /* special case for first (slice) line */
279 if (s->first_slice_line) {
283 *px = mid_pred(A[0], B[0], C[0]);
284 *py = mid_pred(A[1], B[1], C[1]);
291 static inline int wmv2_decode_inter_block(Wmv2Context *w, int16_t *block,
294 MpegEncContext *const s = &w->s;
295 static const int sub_cbp_table[3] = { 2, 3, 1 };
299 s->block_last_index[n] = -1;
303 if (w->per_block_abt)
304 w->abt_type = decode012(&s->gb);
305 w->abt_type_table[n] = w->abt_type;
308 // const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].permutated;
309 const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].scantable;
310 // const uint8_t *scantable = w->abt_type - 1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
312 sub_cbp = sub_cbp_table[decode012(&s->gb)];
315 if ((ret = ff_msmpeg4_decode_block(s, block, n, 1, scantable)) < 0)
319 if ((ret = ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable)) < 0)
322 s->block_last_index[n] = 63;
326 return ff_msmpeg4_decode_block(s, block, n, 1,
327 s->inter_scantable.permutated);
331 int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64])
333 Wmv2Context *const w = (Wmv2Context *) s;
334 int cbp, code, i, ret;
340 if (s->pict_type == AV_PICTURE_TYPE_P) {
341 if (IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])) {
344 for (i = 0; i < 6; i++)
345 s->block_last_index[i] = -1;
346 s->mv_dir = MV_DIR_FORWARD;
347 s->mv_type = MV_TYPE_16X16;
355 code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table,
356 MB_NON_INTRA_VLC_BITS, 3);
358 return AVERROR_INVALIDDATA;
359 s->mb_intra = (~code & 0x40) >> 6;
364 code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
366 av_log(s->avctx, AV_LOG_ERROR,
367 "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
368 return AVERROR_INVALIDDATA;
370 /* predict coded block pattern */
372 for (i = 0; i < 6; i++) {
373 int val = ((code >> (5 - i)) & 1);
375 int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
379 cbp |= val << (5 - i);
385 wmv2_pred_motion(w, &mx, &my);
388 s->bdsp.clear_blocks(s->block[0]);
389 if (s->per_mb_rl_table) {
390 s->rl_table_index = decode012(&s->gb);
391 s->rl_chroma_table_index = s->rl_table_index;
394 if (w->abt_flag && w->per_mb_abt) {
395 w->per_block_abt = get_bits1(&s->gb);
396 if (!w->per_block_abt)
397 w->abt_type = decode012(&s->gb);
399 w->per_block_abt = 0;
402 if ((ret = wmv2_decode_motion(w, &mx, &my)) < 0)
405 s->mv_dir = MV_DIR_FORWARD;
406 s->mv_type = MV_TYPE_16X16;
410 for (i = 0; i < 6; i++) {
411 if ((ret = wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1)) < 0) {
412 av_log(s->avctx, AV_LOG_ERROR,
413 "\nerror while decoding inter block: %d x %d (%d)\n",
414 s->mb_x, s->mb_y, i);
419 if (s->pict_type == AV_PICTURE_TYPE_P)
420 av_dlog(s->avctx, "%d%d ", s->inter_intra_pred, cbp);
421 av_dlog(s->avctx, "I at %d %d %d %06X\n", s->mb_x, s->mb_y,
422 ((cbp & 3) ? 1 : 0) + ((cbp & 0x3C) ? 2 : 0),
423 show_bits(&s->gb, 24));
424 s->ac_pred = get_bits1(&s->gb);
425 if (s->inter_intra_pred) {
426 s->h263_aic_dir = get_vlc2(&s->gb, ff_inter_intra_vlc.table,
427 INTER_INTRA_VLC_BITS, 1);
428 av_dlog(s->avctx, "%d%d %d %d/",
429 s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
431 if (s->per_mb_rl_table && cbp) {
432 s->rl_table_index = decode012(&s->gb);
433 s->rl_chroma_table_index = s->rl_table_index;
436 s->bdsp.clear_blocks(s->block[0]);
437 for (i = 0; i < 6; i++) {
438 if ((ret = ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL)) < 0) {
439 av_log(s->avctx, AV_LOG_ERROR,
440 "\nerror while decoding intra block: %d x %d (%d)\n",
441 s->mb_x, s->mb_y, i);
450 static av_cold int wmv2_decode_init(AVCodecContext *avctx)
452 Wmv2Context *const w = avctx->priv_data;
455 avctx->flags |= CODEC_FLAG_EMU_EDGE;
457 if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
460 ff_wmv2_common_init(w);
462 ff_intrax8_common_init(&w->x8, &w->s);
467 static av_cold int wmv2_decode_end(AVCodecContext *avctx)
469 Wmv2Context *w = avctx->priv_data;
471 ff_intrax8_common_end(&w->x8);
472 return ff_h263_decode_end(avctx);
475 AVCodec ff_wmv2_decoder = {
477 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
478 .type = AVMEDIA_TYPE_VIDEO,
479 .id = AV_CODEC_ID_WMV2,
480 .priv_data_size = sizeof(Wmv2Context),
481 .init = wmv2_decode_init,
482 .close = wmv2_decode_end,
483 .decode = ff_h263_decode_frame,
484 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
485 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,