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"
30 #include "mpegvideo.h"
31 #include "mpeg4video.h"
36 #define RV_GET_MAJOR_VER(x) ((x) >> 28)
37 #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF)
38 #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF)
40 #define DC_VLC_BITS 14 //FIXME find a better solution
42 typedef struct RVDecContext {
47 static const uint16_t rv_lum_code[256] =
49 0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06,
50 0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e,
51 0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16,
52 0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e,
53 0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26,
54 0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e,
55 0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36,
56 0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e,
57 0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386,
58 0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e,
59 0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396,
60 0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e,
61 0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6,
62 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce,
63 0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056,
64 0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004,
65 0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027,
66 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
67 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
68 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
69 0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,
70 0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af,
71 0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,
72 0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
73 0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47,
74 0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f,
75 0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57,
76 0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f,
77 0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67,
78 0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f,
79 0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77,
80 0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f,
83 static const uint8_t rv_lum_bits[256] =
85 14, 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, 12, 12, 12, 12, 12, 12, 12,
90 12, 12, 12, 12, 12, 12, 12, 12,
91 12, 12, 12, 12, 12, 12, 12, 12,
92 12, 12, 12, 12, 12, 12, 12, 12,
93 12, 10, 10, 10, 10, 10, 10, 10,
94 10, 10, 10, 10, 10, 10, 10, 10,
95 10, 10, 10, 10, 10, 10, 10, 10,
96 10, 10, 10, 10, 10, 10, 10, 10,
97 10, 8, 8, 8, 8, 8, 8, 8,
98 8, 8, 8, 8, 8, 8, 8, 8,
99 8, 7, 7, 7, 7, 7, 7, 7,
100 7, 6, 6, 6, 6, 5, 5, 4,
101 2, 4, 5, 5, 6, 6, 6, 6,
102 7, 7, 7, 7, 7, 7, 7, 7,
103 8, 8, 8, 8, 8, 8, 8, 8,
104 8, 8, 8, 8, 8, 8, 8, 8,
105 10, 10, 10, 10, 10, 10, 10, 10,
106 10, 10, 10, 10, 10, 10, 10, 10,
107 10, 10, 10, 10, 10, 10, 10, 10,
108 10, 10, 10, 10, 10, 10, 10, 10,
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,
113 12, 12, 12, 12, 12, 12, 12, 12,
114 12, 12, 12, 12, 12, 12, 12, 12,
115 12, 12, 12, 12, 12, 12, 12, 12,
116 12, 12, 12, 12, 12, 12, 12, 12,
119 static const uint16_t rv_chrom_code[256] =
121 0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06,
122 0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e,
123 0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16,
124 0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e,
125 0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26,
126 0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e,
127 0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36,
128 0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e,
129 0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86,
130 0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e,
131 0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96,
132 0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e,
133 0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6,
134 0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce,
135 0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6,
136 0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002,
137 0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037,
138 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
139 0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7,
140 0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,
141 0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7,
142 0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf,
143 0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,
144 0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,
145 0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47,
146 0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f,
147 0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57,
148 0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f,
149 0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67,
150 0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f,
151 0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77,
152 0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f,
155 static const uint8_t rv_chrom_bits[256] =
157 16, 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, 14, 14, 14, 14, 14, 14, 14,
162 14, 14, 14, 14, 14, 14, 14, 14,
163 14, 14, 14, 14, 14, 14, 14, 14,
164 14, 14, 14, 14, 14, 14, 14, 14,
165 14, 12, 12, 12, 12, 12, 12, 12,
166 12, 12, 12, 12, 12, 12, 12, 12,
167 12, 12, 12, 12, 12, 12, 12, 12,
168 12, 12, 12, 12, 12, 12, 12, 12,
169 12, 10, 10, 10, 10, 10, 10, 10,
170 10, 10, 10, 10, 10, 10, 10, 10,
171 10, 8, 8, 8, 8, 8, 8, 8,
172 8, 6, 6, 6, 6, 4, 4, 3,
173 2, 3, 4, 4, 6, 6, 6, 6,
174 8, 8, 8, 8, 8, 8, 8, 8,
175 10, 10, 10, 10, 10, 10, 10, 10,
176 10, 10, 10, 10, 10, 10, 10, 10,
177 12, 12, 12, 12, 12, 12, 12, 12,
178 12, 12, 12, 12, 12, 12, 12, 12,
179 12, 12, 12, 12, 12, 12, 12, 12,
180 12, 12, 12, 12, 12, 12, 12, 12,
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,
185 14, 14, 14, 14, 14, 14, 14, 14,
186 14, 14, 14, 14, 14, 14, 14, 14,
187 14, 14, 14, 14, 14, 14, 14, 14,
188 14, 14, 14, 14, 14, 14, 14, 14,
191 static VLC rv_dc_lum, rv_dc_chrom;
193 int ff_rv_decode_dc(MpegEncContext *s, int n)
198 code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
200 /* XXX: I don't understand why they use LONGER codes than
201 necessary. The following code would be completely useless
202 if they had thought about it !!! */
203 code = get_bits(&s->gb, 7);
205 code = (int8_t)(get_bits(&s->gb, 7) + 1);
206 } else if (code == 0x7d) {
207 code = -128 + get_bits(&s->gb, 7);
208 } else if (code == 0x7e) {
209 if (get_bits1(&s->gb) == 0)
210 code = (int8_t)(get_bits(&s->gb, 8) + 1);
212 code = (int8_t)(get_bits(&s->gb, 8));
213 } else if (code == 0x7f) {
214 skip_bits(&s->gb, 11);
221 code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
224 code = get_bits(&s->gb, 9);
226 code = (int8_t)(get_bits(&s->gb, 7) + 1);
227 } else if (code == 0x1fd) {
228 code = -128 + get_bits(&s->gb, 7);
229 } else if (code == 0x1fe) {
230 skip_bits(&s->gb, 9);
233 av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
243 /* read RV 1.0 compatible frame header */
244 static int rv10_decode_picture_header(MpegEncContext *s)
246 int mb_count, pb_frame, marker, mb_xy;
248 marker = get_bits1(&s->gb);
250 if (get_bits1(&s->gb))
251 s->pict_type = AV_PICTURE_TYPE_P;
253 s->pict_type = AV_PICTURE_TYPE_I;
254 if(!marker) av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
255 pb_frame = get_bits1(&s->gb);
257 av_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
260 av_log(s->avctx, AV_LOG_ERROR, "pb frame not supported\n");
264 s->qscale = get_bits(&s->gb, 5);
266 av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
270 if (s->pict_type == AV_PICTURE_TYPE_I) {
271 if (s->rv10_version == 3) {
272 /* specific MPEG like DC coding not used */
273 s->last_dc[0] = get_bits(&s->gb, 8);
274 s->last_dc[1] = get_bits(&s->gb, 8);
275 s->last_dc[2] = get_bits(&s->gb, 8);
276 av_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
277 s->last_dc[1], s->last_dc[2]);
280 /* if multiple packets per frame are sent, the position at which
281 to display the macroblocks is coded here */
283 mb_xy= s->mb_x + s->mb_y*s->mb_width;
284 if(show_bits(&s->gb, 12)==0 || (mb_xy && mb_xy < s->mb_num)){
285 s->mb_x = get_bits(&s->gb, 6); /* mb_x */
286 s->mb_y = get_bits(&s->gb, 6); /* mb_y */
287 mb_count = get_bits(&s->gb, 12);
291 mb_count = s->mb_width * s->mb_height;
293 skip_bits(&s->gb, 3); /* ignored */
295 s->unrestricted_mv = 1;
300 static int rv20_decode_picture_header(RVDecContext *rv)
302 MpegEncContext *s = &rv->m;
306 i= get_bits(&s->gb, 2);
308 case 0: s->pict_type= AV_PICTURE_TYPE_I; break;
309 case 1: s->pict_type= AV_PICTURE_TYPE_I; break; //hmm ...
310 case 2: s->pict_type= AV_PICTURE_TYPE_P; break;
311 case 3: s->pict_type= AV_PICTURE_TYPE_B; break;
313 av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
317 if(s->last_picture_ptr==NULL && s->pict_type==AV_PICTURE_TYPE_B){
318 av_log(s->avctx, AV_LOG_ERROR, "early B pix\n");
322 if (get_bits1(&s->gb)){
323 av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
327 s->qscale = get_bits(&s->gb, 5);
329 av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
333 if(RV_GET_MINOR_VER(rv->sub_id) >= 2)
334 s->loop_filter = get_bits1(&s->gb);
336 if(RV_GET_MINOR_VER(rv->sub_id) <= 1)
337 seq = get_bits(&s->gb, 8) << 7;
339 seq = get_bits(&s->gb, 13) << 2;
341 rpr_bits = s->avctx->extradata[1] & 7;
344 rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3);
346 f = get_bits(&s->gb, rpr_bits);
349 new_w= 4*((uint8_t*)s->avctx->extradata)[6+2*f];
350 new_h= 4*((uint8_t*)s->avctx->extradata)[7+2*f];
352 new_w= s->orig_width ;
353 new_h= s->orig_height;
355 if(new_w != s->width || new_h != s->height){
356 av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);
357 if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
359 ff_MPV_common_end(s);
360 avcodec_set_dimensions(s->avctx, new_w, new_h);
363 if (ff_MPV_common_init(s) < 0)
367 if(s->avctx->debug & FF_DEBUG_PICT_INFO){
368 av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
370 } else if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
371 return AVERROR_INVALIDDATA;
373 mb_pos = ff_h263_decode_mba(s);
375 seq |= s->time &~0x7FFF;
376 if(seq - s->time > 0x4000) seq -= 0x8000;
377 if(seq - s->time < -0x4000) seq += 0x8000;
379 if(s->pict_type!=AV_PICTURE_TYPE_B){
381 s->pp_time= s->time - s->last_non_b_time;
382 s->last_non_b_time= s->time;
385 s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
386 if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
387 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
388 return FRAME_SKIPPED;
390 ff_mpeg4_init_direct_mv(s);
394 s->no_rounding= get_bits1(&s->gb);
396 if(RV_GET_MINOR_VER(rv->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;
408 if(s->avctx->debug & FF_DEBUG_PICT_INFO){
409 av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
410 seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
413 assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
415 return s->mb_width*s->mb_height - mb_pos;
418 static av_cold int rv10_decode_init(AVCodecContext *avctx)
420 RVDecContext *rv = avctx->priv_data;
421 MpegEncContext *s = &rv->m;
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 rv->sub_id = AV_RB32((uint8_t*)avctx->extradata + 4);
443 major_ver = RV_GET_MAJOR_VER(rv->sub_id);
444 minor_ver = RV_GET_MINOR_VER(rv->sub_id);
445 micro_ver = RV_GET_MICRO_VER(rv->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", rv->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", rv->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
469 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
471 if (ff_MPV_common_init(s) < 0)
474 ff_h263_decode_init_vlc();
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 RVDecContext *rv = avctx->priv_data;
502 MpegEncContext *s = &rv->m;
503 int mb_count, mb_pos, left, start_mb_x, active_bits_size;
505 active_bits_size = buf_size * 8;
506 init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
507 if(s->codec_id ==AV_CODEC_ID_RV10)
508 mb_count = rv10_decode_picture_header(s);
510 mb_count = rv20_decode_picture_header(rv);
512 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
516 if (s->mb_x >= s->mb_width ||
517 s->mb_y >= s->mb_height) {
518 av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
521 mb_pos = s->mb_y * s->mb_width + s->mb_x;
522 left = s->mb_width * s->mb_height - mb_pos;
523 if (mb_count > left) {
524 av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
528 if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {
529 if(s->current_picture_ptr){ //FIXME write parser so we always have complete frames?
530 ff_er_frame_end(&s->er);
532 s->mb_x= s->mb_y = s->resync_mb_x = s->resync_mb_y= 0;
534 if(ff_MPV_frame_start(s, avctx) < 0)
536 ff_mpeg_er_frame_start(s);
538 if (s->current_picture_ptr->f.pict_type != s->pict_type) {
539 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
544 av_dlog(avctx, "qscale=%d\n", s->qscale);
546 /* default quantization values */
547 if(s->codec_id== AV_CODEC_ID_RV10){
548 if(s->mb_y==0) s->first_slice_line=1;
550 s->first_slice_line=1;
551 s->resync_mb_x= s->mb_x;
554 s->resync_mb_y= s->mb_y;
557 s->c_dc_scale_table= ff_aic_dc_scale_table;
560 s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
563 if(s->modified_quant)
564 s->chroma_qscale_table= ff_h263_chroma_qscale_table;
566 ff_set_qscale(s, s->qscale);
568 s->rv10_first_dc_coded[0] = 0;
569 s->rv10_first_dc_coded[1] = 0;
570 s->rv10_first_dc_coded[2] = 0;
574 s->block_wrap[3]= s->b8_stride;
576 s->block_wrap[5]= s->mb_stride;
577 ff_init_block_index(s);
578 /* decode each macroblock */
580 for(s->mb_num_left= mb_count; s->mb_num_left>0; s->mb_num_left--) {
582 ff_update_block_index(s);
583 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
585 s->mv_dir = MV_DIR_FORWARD;
586 s->mv_type = MV_TYPE_16X16;
587 ret=ff_h263_decode_mb(s, s->block);
589 // Repeat the slice end check from ff_h263_decode_mb with our active
591 if (ret != SLICE_ERROR) {
592 int v = show_bits(&s->gb, 16);
594 if (get_bits_count(&s->gb) + 16 > active_bits_size)
595 v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
600 if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
601 8 * buf_size2 >= get_bits_count(&s->gb)) {
602 active_bits_size = buf_size2 * 8;
603 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
604 8 * buf_size, active_bits_size);
608 if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
609 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
612 if(s->pict_type != AV_PICTURE_TYPE_B)
613 ff_h263_update_motion_val(s);
614 ff_MPV_decode_mb(s, s->block);
616 ff_h263_loop_filter(s);
618 if (++s->mb_x == s->mb_width) {
621 ff_init_block_index(s);
623 if(s->mb_x == s->resync_mb_x)
624 s->first_slice_line=0;
625 if(ret == SLICE_END) break;
628 ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
630 return active_bits_size;
633 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
635 if(avctx->slice_count) return avctx->slice_offset[n];
636 else return AV_RL32(buf + n*8);
639 static int rv10_decode_frame(AVCodecContext *avctx,
640 void *data, int *got_frame,
643 const uint8_t *buf = avpkt->data;
644 int buf_size = avpkt->size;
645 MpegEncContext *s = avctx->priv_data;
647 AVFrame *pict = data;
649 const uint8_t *slices_hdr = NULL;
651 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
653 /* no supplementary picture */
658 if(!avctx->slice_count){
659 slice_count = (*buf++) + 1;
662 if (!slice_count || buf_size <= 8 * slice_count) {
663 av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n", slice_count);
664 return AVERROR_INVALIDDATA;
667 slices_hdr = buf + 4;
668 buf += 8 * slice_count;
669 buf_size -= 8 * slice_count;
671 slice_count = avctx->slice_count;
673 for(i=0; i<slice_count; i++){
674 unsigned offset = get_slice_offset(avctx, slices_hdr, i);
677 if (offset >= buf_size)
678 return AVERROR_INVALIDDATA;
680 if(i+1 == slice_count)
681 size= buf_size - offset;
683 size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
685 if(i+2 >= slice_count)
686 size2= buf_size - offset;
688 size2= get_slice_offset(avctx, slices_hdr, i+2) - offset;
690 if (size <= 0 || size2 <= 0 ||
691 offset + FFMAX(size, size2) > buf_size)
692 return AVERROR_INVALIDDATA;
694 if(rv10_decode_packet(avctx, buf+offset, size, size2) > 8*size)
698 if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){
699 ff_er_frame_end(&s->er);
702 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
703 *pict = s->current_picture_ptr->f;
704 } else if (s->last_picture_ptr != NULL) {
705 *pict = s->last_picture_ptr->f;
708 if(s->last_picture_ptr || s->low_delay){
710 ff_print_debug_info(s, pict);
712 s->current_picture_ptr= NULL; // so we can detect if frame_end was not called (find some nicer solution...)
718 AVCodec ff_rv10_decoder = {
720 .type = AVMEDIA_TYPE_VIDEO,
721 .id = AV_CODEC_ID_RV10,
722 .priv_data_size = sizeof(RVDecContext),
723 .init = rv10_decode_init,
724 .close = rv10_decode_end,
725 .decode = rv10_decode_frame,
726 .capabilities = CODEC_CAP_DR1,
727 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
728 .pix_fmts = ff_pixfmt_list_420,
731 AVCodec ff_rv20_decoder = {
733 .type = AVMEDIA_TYPE_VIDEO,
734 .id = AV_CODEC_ID_RV20,
735 .priv_data_size = sizeof(RVDecContext),
736 .init = rv10_decode_init,
737 .close = rv10_decode_end,
738 .decode = rv10_decode_frame,
739 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
740 .flush = ff_mpeg_flush,
741 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
742 .pix_fmts = ff_pixfmt_list_420,