3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer
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
28 #include "libavutil/imgutils.h"
31 #include "mpegvideo.h"
32 #include "mpeg4video.h"
37 #define RV_GET_MAJOR_VER(x) ((x) >> 28)
38 #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF)
39 #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF)
41 #define DC_VLC_BITS 14 //FIXME find a better solution
43 static const uint16_t rv_lum_code[256] =
45 0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,
46 0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,
47 0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,
48 0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,
49 0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,
50 0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,
51 0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,
52 0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,
53 0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,
54 0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,
55 0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,
56 0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,
57 0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,
58 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,
59 0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,
60 0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,
61 0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,
62 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
63 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
64 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
65 0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,
66 0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,
67 0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,
68 0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
69 0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,
70 0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,
71 0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,
72 0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,
73 0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,
74 0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,
75 0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,
76 0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,
79 static const uint8_t rv_lum_bits[256] =
81 14, 12, 12, 12, 12, 12, 12, 12,
82 12, 12, 12, 12, 12, 12, 12, 12,
83 12, 12, 12, 12, 12, 12, 12, 12,
84 12, 12, 12, 12, 12, 12, 12, 12,
85 12, 12, 12, 12, 12, 12, 12, 12,
86 12, 12, 12, 12, 12, 12, 12, 12,
87 12, 12, 12, 12, 12, 12, 12, 12,
88 12, 12, 12, 12, 12, 12, 12, 12,
89 12, 10, 10, 10, 10, 10, 10, 10,
90 10, 10, 10, 10, 10, 10, 10, 10,
91 10, 10, 10, 10, 10, 10, 10, 10,
92 10, 10, 10, 10, 10, 10, 10, 10,
93 10, 8, 8, 8, 8, 8, 8, 8,
94 8, 8, 8, 8, 8, 8, 8, 8,
95 8, 7, 7, 7, 7, 7, 7, 7,
96 7, 6, 6, 6, 6, 5, 5, 4,
97 2, 4, 5, 5, 6, 6, 6, 6,
98 7, 7, 7, 7, 7, 7, 7, 7,
99 8, 8, 8, 8, 8, 8, 8, 8,
100 8, 8, 8, 8, 8, 8, 8, 8,
101 10, 10, 10, 10, 10, 10, 10, 10,
102 10, 10, 10, 10, 10, 10, 10, 10,
103 10, 10, 10, 10, 10, 10, 10, 10,
104 10, 10, 10, 10, 10, 10, 10, 10,
105 12, 12, 12, 12, 12, 12, 12, 12,
106 12, 12, 12, 12, 12, 12, 12, 12,
107 12, 12, 12, 12, 12, 12, 12, 12,
108 12, 12, 12, 12, 12, 12, 12, 12,
109 12, 12, 12, 12, 12, 12, 12, 12,
110 12, 12, 12, 12, 12, 12, 12, 12,
111 12, 12, 12, 12, 12, 12, 12, 12,
112 12, 12, 12, 12, 12, 12, 12, 12,
115 static const uint16_t rv_chrom_code[256] =
117 0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06,
118 0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e,
119 0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16,
120 0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e,
121 0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26,
122 0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e,
123 0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36,
124 0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e,
125 0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86,
126 0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e,
127 0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96,
128 0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e,
129 0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6,
130 0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce,
131 0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6,
132 0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002,
133 0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037,
134 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
135 0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7,
136 0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,
137 0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7,
138 0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf,
139 0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,
140 0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,
141 0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47,
142 0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f,
143 0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57,
144 0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f,
145 0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67,
146 0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f,
147 0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77,
148 0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f,
151 static const uint8_t rv_chrom_bits[256] =
153 16, 14, 14, 14, 14, 14, 14, 14,
154 14, 14, 14, 14, 14, 14, 14, 14,
155 14, 14, 14, 14, 14, 14, 14, 14,
156 14, 14, 14, 14, 14, 14, 14, 14,
157 14, 14, 14, 14, 14, 14, 14, 14,
158 14, 14, 14, 14, 14, 14, 14, 14,
159 14, 14, 14, 14, 14, 14, 14, 14,
160 14, 14, 14, 14, 14, 14, 14, 14,
161 14, 12, 12, 12, 12, 12, 12, 12,
162 12, 12, 12, 12, 12, 12, 12, 12,
163 12, 12, 12, 12, 12, 12, 12, 12,
164 12, 12, 12, 12, 12, 12, 12, 12,
165 12, 10, 10, 10, 10, 10, 10, 10,
166 10, 10, 10, 10, 10, 10, 10, 10,
167 10, 8, 8, 8, 8, 8, 8, 8,
168 8, 6, 6, 6, 6, 4, 4, 3,
169 2, 3, 4, 4, 6, 6, 6, 6,
170 8, 8, 8, 8, 8, 8, 8, 8,
171 10, 10, 10, 10, 10, 10, 10, 10,
172 10, 10, 10, 10, 10, 10, 10, 10,
173 12, 12, 12, 12, 12, 12, 12, 12,
174 12, 12, 12, 12, 12, 12, 12, 12,
175 12, 12, 12, 12, 12, 12, 12, 12,
176 12, 12, 12, 12, 12, 12, 12, 12,
177 14, 14, 14, 14, 14, 14, 14, 14,
178 14, 14, 14, 14, 14, 14, 14, 14,
179 14, 14, 14, 14, 14, 14, 14, 14,
180 14, 14, 14, 14, 14, 14, 14, 14,
181 14, 14, 14, 14, 14, 14, 14, 14,
182 14, 14, 14, 14, 14, 14, 14, 14,
183 14, 14, 14, 14, 14, 14, 14, 14,
184 14, 14, 14, 14, 14, 14, 14, 14,
187 static VLC rv_dc_lum, rv_dc_chrom;
189 int ff_rv_decode_dc(MpegEncContext *s, int n)
194 code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
196 /* XXX: I don't understand why they use LONGER codes than
197 necessary. The following code would be completely useless
198 if they had thought about it !!! */
199 code = get_bits(&s->gb, 7);
201 code = (int8_t)(get_bits(&s->gb, 7) + 1);
202 } else if (code == 0x7d) {
203 code = -128 + get_bits(&s->gb, 7);
204 } else if (code == 0x7e) {
205 if (get_bits1(&s->gb) == 0)
206 code = (int8_t)(get_bits(&s->gb, 8) + 1);
208 code = (int8_t)(get_bits(&s->gb, 8));
209 } else if (code == 0x7f) {
210 skip_bits(&s->gb, 11);
217 code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
220 code = get_bits(&s->gb, 9);
222 code = (int8_t)(get_bits(&s->gb, 7) + 1);
223 } else if (code == 0x1fd) {
224 code = -128 + get_bits(&s->gb, 7);
225 } else if (code == 0x1fe) {
226 skip_bits(&s->gb, 9);
229 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
239 /* read RV 1.0 compatible frame header */
240 static int rv10_decode_picture_header(MpegEncContext *s)
242 int mb_count, pb_frame, marker, mb_xy;
244 marker = get_bits1(&s->gb);
246 if (get_bits1(&s->gb))
247 s->pict_type = AV_PICTURE_TYPE_P;
249 s->pict_type = AV_PICTURE_TYPE_I;
250 if(!marker) av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
251 pb_frame = get_bits1(&s->gb);
253 av_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
256 av_log(s->avctx, AV_LOG_ERROR, "pb frame not supported\n");
260 s->qscale = get_bits(&s->gb, 5);
262 av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
266 if (s->pict_type == AV_PICTURE_TYPE_I) {
267 if (s->rv10_version == 3) {
268 /* specific MPEG like DC coding not used */
269 s->last_dc[0] = get_bits(&s->gb, 8);
270 s->last_dc[1] = get_bits(&s->gb, 8);
271 s->last_dc[2] = get_bits(&s->gb, 8);
272 av_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
273 s->last_dc[1], s->last_dc[2]);
276 /* if multiple packets per frame are sent, the position at which
277 to display the macroblocks is coded here */
279 mb_xy= s->mb_x + s->mb_y*s->mb_width;
280 if(show_bits(&s->gb, 12)==0 || (mb_xy && mb_xy < s->mb_num)){
281 s->mb_x = get_bits(&s->gb, 6); /* mb_x */
282 s->mb_y = get_bits(&s->gb, 6); /* mb_y */
283 mb_count = get_bits(&s->gb, 12);
287 mb_count = s->mb_width * s->mb_height;
289 skip_bits(&s->gb, 3); /* ignored */
291 s->unrestricted_mv = 1;
296 static int rv20_decode_picture_header(MpegEncContext *s)
301 i= get_bits(&s->gb, 2);
303 case 0: s->pict_type= AV_PICTURE_TYPE_I; break;
304 case 1: s->pict_type= AV_PICTURE_TYPE_I; break; //hmm ...
305 case 2: s->pict_type= AV_PICTURE_TYPE_P; break;
306 case 3: s->pict_type= AV_PICTURE_TYPE_B; break;
308 av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
312 if(s->last_picture_ptr==NULL && s->pict_type==AV_PICTURE_TYPE_B){
313 av_log(s->avctx, AV_LOG_ERROR, "early B pix\n");
317 if (get_bits1(&s->gb)){
318 av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
322 s->qscale = get_bits(&s->gb, 5);
324 av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
328 if(RV_GET_MINOR_VER(s->avctx->sub_id) >= 2)
329 s->loop_filter = get_bits1(&s->gb);
331 if(RV_GET_MINOR_VER(s->avctx->sub_id) <= 1)
332 seq = get_bits(&s->gb, 8) << 7;
334 seq = get_bits(&s->gb, 13) << 2;
336 rpr_bits = s->avctx->extradata[1] & 7;
339 rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3);
341 f = get_bits(&s->gb, rpr_bits);
344 new_w= 4*((uint8_t*)s->avctx->extradata)[6+2*f];
345 new_h= 4*((uint8_t*)s->avctx->extradata)[7+2*f];
347 new_w= s->orig_width ;
348 new_h= s->orig_height;
350 if(new_w != s->width || new_h != s->height){
351 av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);
352 if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
354 ff_MPV_common_end(s);
355 avcodec_set_dimensions(s->avctx, new_w, new_h);
358 if (ff_MPV_common_init(s) < 0)
362 if(s->avctx->debug & FF_DEBUG_PICT_INFO){
363 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
365 } else if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
366 return AVERROR_INVALIDDATA;
368 mb_pos = ff_h263_decode_mba(s);
370 //av_log(s->avctx, AV_LOG_DEBUG, "%d\n", seq);
371 seq |= s->time &~0x7FFF;
372 if(seq - s->time > 0x4000) seq -= 0x8000;
373 if(seq - s->time < -0x4000) seq += 0x8000;
375 if(s->pict_type!=AV_PICTURE_TYPE_B){
377 s->pp_time= s->time - s->last_non_b_time;
378 s->last_non_b_time= s->time;
381 s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
382 if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
383 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
384 return FRAME_SKIPPED;
386 ff_mpeg4_init_direct_mv(s);
389 // printf("%d %d %d %d %d\n", seq, (int)s->time, (int)s->last_non_b_time, s->pp_time, s->pb_time);
390 /*for(i=0; i<32; i++){
391 av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
393 av_log(s->avctx, AV_LOG_DEBUG, "\n");*/
394 s->no_rounding= get_bits1(&s->gb);
396 if(RV_GET_MINOR_VER(s->avctx->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
397 skip_bits(&s->gb, 5); // binary decoder reads 3+2 bits here but they don't seem to be used
400 s->unrestricted_mv = 1;
401 s->h263_aic= s->pict_type == AV_PICTURE_TYPE_I;
402 // s->alt_inter_vlc=1;
406 if(!s->avctx->lowres)
409 if(s->avctx->debug & FF_DEBUG_PICT_INFO){
410 av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
411 seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
414 assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
416 return s->mb_width*s->mb_height - mb_pos;
419 static av_cold int rv10_decode_init(AVCodecContext *avctx)
421 MpegEncContext *s = avctx->priv_data;
423 int major_ver, minor_ver, micro_ver;
425 if (avctx->extradata_size < 8) {
426 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
430 ff_MPV_decode_defaults(s);
433 s->out_format = FMT_H263;
434 s->codec_id= avctx->codec_id;
435 avctx->flags |= CODEC_FLAG_EMU_EDGE;
437 s->orig_width = s->width = avctx->coded_width;
438 s->orig_height= s->height = avctx->coded_height;
440 s->h263_long_vectors= ((uint8_t*)avctx->extradata)[3] & 1;
441 avctx->sub_id= AV_RB32((uint8_t*)avctx->extradata + 4);
443 major_ver = RV_GET_MAJOR_VER(avctx->sub_id);
444 minor_ver = RV_GET_MINOR_VER(avctx->sub_id);
445 micro_ver = RV_GET_MICRO_VER(avctx->sub_id);
450 s->rv10_version = micro_ver ? 3 : 1;
451 s->obmc = micro_ver == 2;
454 if (minor_ver >= 2) {
456 s->avctx->has_b_frames = 1;
460 av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", avctx->sub_id);
461 av_log_missing_feature(avctx, "RV1/2 version", 1);
462 return AVERROR_PATCHWELCOME;
465 if(avctx->debug & FF_DEBUG_PICT_INFO){
466 av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", avctx->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
469 avctx->pix_fmt = PIX_FMT_YUV420P;
471 if (ff_MPV_common_init(s) < 0)
474 ff_h263_decode_init_vlc(s);
478 INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
480 rv_lum_code, 2, 2, 16384);
481 INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
483 rv_chrom_code, 2, 2, 16388);
490 static av_cold int rv10_decode_end(AVCodecContext *avctx)
492 MpegEncContext *s = avctx->priv_data;
494 ff_MPV_common_end(s);
498 static int rv10_decode_packet(AVCodecContext *avctx,
499 const uint8_t *buf, int buf_size, int buf_size2)
501 MpegEncContext *s = avctx->priv_data;
502 int mb_count, mb_pos, left, start_mb_x;
504 init_get_bits(&s->gb, buf, buf_size*8);
505 if(s->codec_id ==CODEC_ID_RV10)
506 mb_count = rv10_decode_picture_header(s);
508 mb_count = rv20_decode_picture_header(s);
510 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
514 if (s->mb_x >= s->mb_width ||
515 s->mb_y >= s->mb_height) {
516 av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
519 mb_pos = s->mb_y * s->mb_width + s->mb_x;
520 left = s->mb_width * s->mb_height - mb_pos;
521 if (mb_count > left) {
522 av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
526 if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {
527 if(s->current_picture_ptr){ //FIXME write parser so we always have complete frames?
530 s->mb_x= s->mb_y = s->resync_mb_x = s->resync_mb_y= 0;
532 if(ff_MPV_frame_start(s, avctx) < 0)
534 ff_er_frame_start(s);
536 if (s->current_picture_ptr->f.pict_type != s->pict_type) {
537 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
542 av_dlog(avctx, "qscale=%d\n", s->qscale);
544 /* default quantization values */
545 if(s->codec_id== CODEC_ID_RV10){
546 if(s->mb_y==0) s->first_slice_line=1;
548 s->first_slice_line=1;
549 s->resync_mb_x= s->mb_x;
552 s->resync_mb_y= s->mb_y;
555 s->c_dc_scale_table= ff_aic_dc_scale_table;
558 s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
561 if(s->modified_quant)
562 s->chroma_qscale_table= ff_h263_chroma_qscale_table;
564 ff_set_qscale(s, s->qscale);
566 s->rv10_first_dc_coded[0] = 0;
567 s->rv10_first_dc_coded[1] = 0;
568 s->rv10_first_dc_coded[2] = 0;
572 s->block_wrap[3]= s->b8_stride;
574 s->block_wrap[5]= s->mb_stride;
575 ff_init_block_index(s);
576 /* decode each macroblock */
578 for(s->mb_num_left= mb_count; s->mb_num_left>0; s->mb_num_left--) {
580 ff_update_block_index(s);
581 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
583 s->mv_dir = MV_DIR_FORWARD;
584 s->mv_type = MV_TYPE_16X16;
585 ret=ff_h263_decode_mb(s, s->block);
587 if (ret != SLICE_ERROR && s->gb.size_in_bits < get_bits_count(&s->gb) && 8*buf_size2 >= get_bits_count(&s->gb)){
588 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n", s->gb.size_in_bits, 8*buf_size2);
589 s->gb.size_in_bits= 8*buf_size2;
593 if (ret == SLICE_ERROR || s->gb.size_in_bits < get_bits_count(&s->gb)) {
594 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
597 if(s->pict_type != AV_PICTURE_TYPE_B)
598 ff_h263_update_motion_val(s);
599 ff_MPV_decode_mb(s, s->block);
601 ff_h263_loop_filter(s);
603 if (++s->mb_x == s->mb_width) {
606 ff_init_block_index(s);
608 if(s->mb_x == s->resync_mb_x)
609 s->first_slice_line=0;
610 if(ret == SLICE_END) break;
613 ff_er_add_slice(s, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
615 return s->gb.size_in_bits;
618 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
620 if(avctx->slice_count) return avctx->slice_offset[n];
621 else return AV_RL32(buf + n*8);
624 static int rv10_decode_frame(AVCodecContext *avctx,
625 void *data, int *data_size,
628 const uint8_t *buf = avpkt->data;
629 int buf_size = avpkt->size;
630 MpegEncContext *s = avctx->priv_data;
632 AVFrame *pict = data;
634 const uint8_t *slices_hdr = NULL;
636 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
638 /* no supplementary picture */
643 if(!avctx->slice_count){
644 slice_count = (*buf++) + 1;
645 slices_hdr = buf + 4;
646 buf += 8 * slice_count;
648 slice_count = avctx->slice_count;
650 for(i=0; i<slice_count; i++){
651 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
654 if (offset >= buf_size)
655 return AVERROR_INVALIDDATA;
657 if(i+1 == slice_count)
658 size= buf_size - offset;
660 size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
662 if(i+2 >= slice_count)
663 size2= buf_size - offset;
665 size2= get_slice_offset(avctx, slices_hdr, i+2) - offset;
667 if (size <= 0 || size2 <= 0 ||
668 offset + FFMAX(size, size2) > buf_size)
669 return AVERROR_INVALIDDATA;
671 if(rv10_decode_packet(avctx, buf+offset, size, size2) > 8*size)
675 if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){
679 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
680 *pict = s->current_picture_ptr->f;
681 } else if (s->last_picture_ptr != NULL) {
682 *pict = s->last_picture_ptr->f;
685 if(s->last_picture_ptr || s->low_delay){
686 *data_size = sizeof(AVFrame);
687 ff_print_debug_info(s, pict);
689 s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
695 AVCodec ff_rv10_decoder = {
697 .type = AVMEDIA_TYPE_VIDEO,
699 .priv_data_size = sizeof(MpegEncContext),
700 .init = rv10_decode_init,
701 .close = rv10_decode_end,
702 .decode = rv10_decode_frame,
703 .capabilities = CODEC_CAP_DR1,
705 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
706 .pix_fmts= ff_pixfmt_list_420,
709 AVCodec ff_rv20_decoder = {
711 .type = AVMEDIA_TYPE_VIDEO,
713 .priv_data_size = sizeof(MpegEncContext),
714 .init = rv10_decode_init,
715 .close = rv10_decode_end,
716 .decode = rv10_decode_frame,
717 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
718 .flush= ff_mpeg_flush,
720 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
721 .pix_fmts= ff_pixfmt_list_420,