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 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)
355 avcodec_set_dimensions(s->avctx, new_w, new_h);
358 if (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);
367 mb_pos = ff_h263_decode_mba(s);
369 //av_log(s->avctx, AV_LOG_DEBUG, "%d\n", seq);
370 seq |= s->time &~0x7FFF;
371 if(seq - s->time > 0x4000) seq -= 0x8000;
372 if(seq - s->time < -0x4000) seq += 0x8000;
374 if(s->pict_type!=AV_PICTURE_TYPE_B){
376 s->pp_time= s->time - s->last_non_b_time;
377 s->last_non_b_time= s->time;
380 s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
381 if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
382 av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
383 return FRAME_SKIPPED;
385 ff_mpeg4_init_direct_mv(s);
388 // printf("%d %d %d %d %d\n", seq, (int)s->time, (int)s->last_non_b_time, s->pp_time, s->pb_time);
389 /*for(i=0; i<32; i++){
390 av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
392 av_log(s->avctx, AV_LOG_DEBUG, "\n");*/
393 s->no_rounding= get_bits1(&s->gb);
395 if(RV_GET_MINOR_VER(s->avctx->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
396 skip_bits(&s->gb, 5); // binary decoder reads 3+2 bits here but they don't seem to be used
399 s->unrestricted_mv = 1;
400 s->h263_aic= s->pict_type == AV_PICTURE_TYPE_I;
401 // s->alt_inter_vlc=1;
405 if(!s->avctx->lowres)
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 MpegEncContext *s = avctx->priv_data;
422 int major_ver, minor_ver, micro_ver;
424 if (avctx->extradata_size < 8) {
425 av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
429 MPV_decode_defaults(s);
432 s->out_format = FMT_H263;
433 s->codec_id= avctx->codec_id;
434 avctx->flags |= CODEC_FLAG_EMU_EDGE;
436 s->orig_width = s->width = avctx->coded_width;
437 s->orig_height= s->height = avctx->coded_height;
439 s->h263_long_vectors= ((uint8_t*)avctx->extradata)[3] & 1;
440 avctx->sub_id= AV_RB32((uint8_t*)avctx->extradata + 4);
442 major_ver = RV_GET_MAJOR_VER(avctx->sub_id);
443 minor_ver = RV_GET_MINOR_VER(avctx->sub_id);
444 micro_ver = RV_GET_MICRO_VER(avctx->sub_id);
449 s->rv10_version = micro_ver ? 3 : 1;
450 s->obmc = micro_ver == 2;
453 if (minor_ver >= 2) {
455 s->avctx->has_b_frames = 1;
459 av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", avctx->sub_id);
460 av_log_missing_feature(avctx, "RV1/2 version", 1);
461 return AVERROR_PATCHWELCOME;
464 if(avctx->debug & FF_DEBUG_PICT_INFO){
465 av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", avctx->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
468 avctx->pix_fmt = PIX_FMT_YUV420P;
470 if (MPV_common_init(s) < 0)
473 h263_decode_init_vlc(s);
477 INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
479 rv_lum_code, 2, 2, 16384);
480 INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
482 rv_chrom_code, 2, 2, 16388);
489 static av_cold int rv10_decode_end(AVCodecContext *avctx)
491 MpegEncContext *s = avctx->priv_data;
497 static int rv10_decode_packet(AVCodecContext *avctx,
498 const uint8_t *buf, int buf_size, int buf_size2)
500 MpegEncContext *s = avctx->priv_data;
501 int mb_count, mb_pos, left, start_mb_x;
503 init_get_bits(&s->gb, buf, buf_size*8);
504 if(s->codec_id ==CODEC_ID_RV10)
505 mb_count = rv10_decode_picture_header(s);
507 mb_count = rv20_decode_picture_header(s);
509 av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
513 if (s->mb_x >= s->mb_width ||
514 s->mb_y >= s->mb_height) {
515 av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
518 mb_pos = s->mb_y * s->mb_width + s->mb_x;
519 left = s->mb_width * s->mb_height - mb_pos;
520 if (mb_count > left) {
521 av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
525 if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {
526 if(s->current_picture_ptr){ //FIXME write parser so we always have complete frames?
529 s->mb_x= s->mb_y = s->resync_mb_x = s->resync_mb_y= 0;
531 if(MPV_frame_start(s, avctx) < 0)
533 ff_er_frame_start(s);
535 if (s->current_picture_ptr->f.pict_type != s->pict_type) {
536 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
541 av_dlog(avctx, "qscale=%d\n", s->qscale);
543 /* default quantization values */
544 if(s->codec_id== CODEC_ID_RV10){
545 if(s->mb_y==0) s->first_slice_line=1;
547 s->first_slice_line=1;
548 s->resync_mb_x= s->mb_x;
551 s->resync_mb_y= s->mb_y;
554 s->c_dc_scale_table= ff_aic_dc_scale_table;
557 s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
560 if(s->modified_quant)
561 s->chroma_qscale_table= ff_h263_chroma_qscale_table;
563 ff_set_qscale(s, s->qscale);
565 s->rv10_first_dc_coded[0] = 0;
566 s->rv10_first_dc_coded[1] = 0;
567 s->rv10_first_dc_coded[2] = 0;
571 s->block_wrap[3]= s->b8_stride;
573 s->block_wrap[5]= s->mb_stride;
574 ff_init_block_index(s);
575 /* decode each macroblock */
577 for(s->mb_num_left= mb_count; s->mb_num_left>0; s->mb_num_left--) {
579 ff_update_block_index(s);
580 av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
582 s->mv_dir = MV_DIR_FORWARD;
583 s->mv_type = MV_TYPE_16X16;
584 ret=ff_h263_decode_mb(s, s->block);
586 if (ret != SLICE_ERROR && s->gb.size_in_bits < get_bits_count(&s->gb) && 8*buf_size2 >= get_bits_count(&s->gb)){
587 av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n", s->gb.size_in_bits, 8*buf_size2);
588 s->gb.size_in_bits= 8*buf_size2;
592 if (ret == SLICE_ERROR || s->gb.size_in_bits < get_bits_count(&s->gb)) {
593 av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
596 if(s->pict_type != AV_PICTURE_TYPE_B)
597 ff_h263_update_motion_val(s);
598 MPV_decode_mb(s, s->block);
600 ff_h263_loop_filter(s);
602 if (++s->mb_x == s->mb_width) {
605 ff_init_block_index(s);
607 if(s->mb_x == s->resync_mb_x)
608 s->first_slice_line=0;
609 if(ret == SLICE_END) break;
612 ff_er_add_slice(s, start_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
614 return s->gb.size_in_bits;
617 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
619 if(avctx->slice_count) return avctx->slice_offset[n];
620 else return AV_RL32(buf + n*8);
623 static int rv10_decode_frame(AVCodecContext *avctx,
624 void *data, int *data_size,
627 const uint8_t *buf = avpkt->data;
628 int buf_size = avpkt->size;
629 MpegEncContext *s = avctx->priv_data;
631 AVFrame *pict = data;
633 const uint8_t *slices_hdr = NULL;
635 av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
637 /* no supplementary picture */
642 if(!avctx->slice_count){
643 slice_count = (*buf++) + 1;
644 slices_hdr = buf + 4;
645 buf += 8 * slice_count;
647 slice_count = avctx->slice_count;
649 for(i=0; i<slice_count; i++){
650 int offset= get_slice_offset(avctx, slices_hdr, i);
653 if(i+1 == slice_count)
654 size= buf_size - offset;
656 size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
658 if(i+2 >= slice_count)
659 size2= buf_size - offset;
661 size2= get_slice_offset(avctx, slices_hdr, i+2) - offset;
663 if(rv10_decode_packet(avctx, buf+offset, size, size2) > 8*size)
667 if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){
671 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
672 *pict= *(AVFrame*)s->current_picture_ptr;
673 } else if (s->last_picture_ptr != NULL) {
674 *pict= *(AVFrame*)s->last_picture_ptr;
677 if(s->last_picture_ptr || s->low_delay){
678 *data_size = sizeof(AVFrame);
679 ff_print_debug_info(s, pict);
681 s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
687 AVCodec ff_rv10_decoder = {
689 .type = AVMEDIA_TYPE_VIDEO,
691 .priv_data_size = sizeof(MpegEncContext),
692 .init = rv10_decode_init,
693 .close = rv10_decode_end,
694 .decode = rv10_decode_frame,
695 .capabilities = CODEC_CAP_DR1,
697 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
698 .pix_fmts= ff_pixfmt_list_420,
701 AVCodec ff_rv20_decoder = {
703 .type = AVMEDIA_TYPE_VIDEO,
705 .priv_data_size = sizeof(MpegEncContext),
706 .init = rv10_decode_init,
707 .close = rv10_decode_end,
708 .decode = rv10_decode_frame,
709 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
710 .flush= ff_mpeg_flush,
712 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
713 .pix_fmts= ff_pixfmt_list_420,