FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/rv30.c
Date: 2025-03-08 20:38:41
Exec Total Coverage
Lines: 151 174 86.8%
Functions: 6 6 100.0%
Branches: 117 132 88.6%
Line Branch Exec Source
1 /*
2 * RV30 decoder
3 * Copyright (c) 2007 Konstantin Shishkov
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * RV30 decoder
25 */
26
27 #include "avcodec.h"
28 #include "codec_internal.h"
29 #include "mpegutils.h"
30 #include "mpegvideo.h"
31 #include "mpegvideodec.h"
32 #include "golomb.h"
33
34 #include "rv34.h"
35 #include "rv30data.h"
36
37
38 707 static int rv30_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
39 {
40 707 AVCodecContext *avctx = r->s.avctx;
41 707 int w = r->s.width, h = r->s.height;
42 int mb_size;
43 int rpr;
44
45 707 memset(si, 0, sizeof(SliceInfo));
46
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 707 if(get_bits(gb, 3))
47 1 return -1;
48 706 si->type = get_bits(gb, 2);
49
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 706 if(si->type == 1) si->type = 0;
50
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 706 if(get_bits1(gb))
51 ✗ return -1;
52 706 si->quant = get_bits(gb, 5);
53 706 skip_bits1(gb);
54 706 si->pts = get_bits(gb, 13);
55 706 rpr = get_bits(gb, av_log2(r->max_rpr) + 1);
56
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 706 if(rpr){
57 ✗ if (rpr > r->max_rpr) {
58 ✗ av_log(avctx, AV_LOG_ERROR, "rpr too large\n");
59 ✗ return AVERROR_INVALIDDATA;
60 }
61
62 ✗ if (avctx->extradata_size < rpr * 2 + 8) {
63 ✗ av_log(avctx, AV_LOG_ERROR,
64 "Insufficient extradata - need at least %d bytes, got %d\n",
65 ✗ 8 + rpr * 2, avctx->extradata_size);
66 ✗ return AVERROR(EINVAL);
67 }
68
69 ✗ w = r->s.avctx->extradata[6 + rpr*2] << 2;
70 ✗ h = r->s.avctx->extradata[7 + rpr*2] << 2;
71 } else {
72 706 w = r->orig_width;
73 706 h = r->orig_height;
74 }
75 706 si->width = w;
76 706 si->height = h;
77 706 mb_size = ((w + 15) >> 4) * ((h + 15) >> 4);
78 706 si->start = ff_rv34_get_start_offset(gb, mb_size);
79 706 skip_bits1(gb);
80 706 return 0;
81 }
82
83 /**
84 * Decode 4x4 intra types array.
85 */
86 2739 static int rv30_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst)
87 {
88 int i, j, k;
89
90
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 13695 for(i = 0; i < 4; i++, dst += r->intra_types_stride - 4){
91
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 32868 for(j = 0; j < 4; j+= 2){
92 21912 unsigned code = get_interleaved_ue_golomb(gb) << 1;
93
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 21912 if (code > 80U*2U) {
94 ✗ av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction code\n");
95 ✗ return -1;
96 }
97
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 65736 for(k = 0; k < 2; k++){
98 43824 int A = dst[-r->intra_types_stride] + 1;
99 43824 int B = dst[-1] + 1;
100 43824 *dst++ = rv30_itype_from_context[A * 90 + B * 9 + rv30_itype_code[code + k]];
101
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 43824 if(dst[-1] == 9){
102 ✗ av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction mode\n");
103 ✗ return -1;
104 }
105 }
106 }
107 }
108 2739 return 0;
109 }
110
111 /**
112 * Decode macroblock information.
113 */
114 68640 static int rv30_decode_mb_info(RV34DecContext *r)
115 {
116 static const int rv30_p_types[6] = { RV34_MB_SKIP, RV34_MB_P_16x16, RV34_MB_P_8x8, -1, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
117 static const int rv30_b_types[6] = { RV34_MB_SKIP, RV34_MB_B_DIRECT, RV34_MB_B_FORWARD, RV34_MB_B_BACKWARD, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
118 68640 MpegEncContext *s = &r->s;
119 68640 GetBitContext *gb = &s->gb;
120 68640 unsigned code = get_interleaved_ue_golomb(gb);
121
122
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 68640 if (code > 11) {
123 ✗ av_log(s->avctx, AV_LOG_ERROR, "Incorrect MB type code\n");
124 ✗ return -1;
125 }
126
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 68640 if(code > 5){
127 ✗ av_log(s->avctx, AV_LOG_ERROR, "dquant needed\n");
128 ✗ code -= 6;
129 }
130
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 68640 if(s->pict_type != AV_PICTURE_TYPE_B)
131 15180 return rv30_p_types[code];
132 else
133 53460 return rv30_b_types[code];
134 }
135
136 1048204 static inline void rv30_weak_loop_filter(uint8_t *src, const int step,
137 const int stride, const int lim)
138 {
139 1048204 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
140 int i, diff;
141
142
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 5241020 for(i = 0; i < 4; i++){
143 4192816 diff = ((src[-2*step] - src[1*step]) - (src[-1*step] - src[0*step])*4) >> 3;
144 4192816 diff = av_clip(diff, -lim, lim);
145 4192816 src[-1*step] = cm[src[-1*step] + diff];
146 4192816 src[ 0*step] = cm[src[ 0*step] - diff];
147 4192816 src += stride;
148 }
149 1048204 }
150
151 3308 static void rv30_loop_filter(RV34DecContext *r, int row)
152 {
153 3308 MpegEncContext *s = &r->s;
154 int mb_pos, mb_x;
155 int i, j, k;
156 uint8_t *Y, *C;
157 3308 int loc_lim, cur_lim, left_lim = 0, top_lim = 0;
158
159 3308 mb_pos = row * s->mb_stride;
160
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 75988 for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
161 72680 int mbtype = s->cur_pic.mb_type[mb_pos];
162
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 72680 if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype))
163 9106 r->deblock_coefs[mb_pos] = 0xFFFF;
164
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 72680 if(IS_INTRA(mbtype))
165 9106 r->cbp_chroma[mb_pos] = 0xFF;
166 }
167
168 /* all vertical edges are filtered first
169 * and horizontal edges are filtered on the next iteration
170 */
171 3308 mb_pos = row * s->mb_stride;
172
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 75988 for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
173 72680 cur_lim = rv30_loop_filt_lim[s->cur_pic.qscale_table[mb_pos]];
174
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 72680 if(mb_x)
175 69372 left_lim = rv30_loop_filt_lim[s->cur_pic.qscale_table[mb_pos - 1]];
176
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 363400 for(j = 0; j < 16; j += 4){
177
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 290720 Y = s->cur_pic.data[0] + mb_x*16 + (row*16 + j) * s->linesize + 4 * !mb_x;
178
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 1440368 for(i = !mb_x; i < 4; i++, Y += 4){
179 1149648 int ij = i + j;
180 1149648 loc_lim = 0;
181
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 1149648 if(r->deblock_coefs[mb_pos] & (1 << ij))
182 351712 loc_lim = cur_lim;
183
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 797936 else if(!i && r->deblock_coefs[mb_pos - 1] & (1 << (ij + 3)))
184 14120 loc_lim = left_lim;
185
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 783816 else if( i && r->deblock_coefs[mb_pos] & (1 << (ij - 1)))
186 38450 loc_lim = cur_lim;
187
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 1149648 if(loc_lim)
188 373358 rv30_weak_loop_filter(Y, 1, s->linesize, loc_lim);
189 }
190 }
191
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 218040 for(k = 0; k < 2; k++){
192 145360 int cur_cbp, left_cbp = 0;
193 145360 cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
194
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 145360 if(mb_x)
195 138744 left_cbp = (r->cbp_chroma[mb_pos - 1] >> (k*4)) & 0xF;
196
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 436080 for(j = 0; j < 8; j += 4){
197
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 290720 C = s->cur_pic.data[k + 1] + mb_x*8 + (row*8 + j) * s->uvlinesize + 4 * !mb_x;
198
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 858928 for(i = !mb_x; i < 2; i++, C += 4){
199 568208 int ij = i + (j >> 1);
200 568208 loc_lim = 0;
201
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 568208 if (cur_cbp & (1 << ij))
202 132602 loc_lim = cur_lim;
203
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 435606 else if(!i && left_cbp & (1 << (ij + 1)))
204 24668 loc_lim = left_lim;
205
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 410938 else if( i && cur_cbp & (1 << (ij - 1)))
206 16738 loc_lim = cur_lim;
207
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 568208 if(loc_lim)
208 143764 rv30_weak_loop_filter(C, 1, s->uvlinesize, loc_lim);
209 }
210 }
211 }
212 }
213 3308 mb_pos = row * s->mb_stride;
214
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 75988 for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
215 72680 cur_lim = rv30_loop_filt_lim[s->cur_pic.qscale_table[mb_pos]];
216
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 72680 if(row)
217 67830 top_lim = rv30_loop_filt_lim[s->cur_pic.qscale_table[mb_pos - s->mb_stride]];
218
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 358550 for(j = 4*!row; j < 16; j += 4){
219 285870 Y = s->cur_pic.data[0] + mb_x*16 + (row*16 + j) * s->linesize;
220
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 1429350 for(i = 0; i < 4; i++, Y += 4){
221 1143480 int ij = i + j;
222 1143480 loc_lim = 0;
223
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 1143480 if(r->deblock_coefs[mb_pos] & (1 << ij))
224 350204 loc_lim = cur_lim;
225
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 793276 else if(!j && r->deblock_coefs[mb_pos - s->mb_stride] & (1 << (ij + 12)))
226 15928 loc_lim = top_lim;
227
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 777348 else if( j && r->deblock_coefs[mb_pos] & (1 << (ij - 4)))
228 45866 loc_lim = cur_lim;
229
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 1143480 if(loc_lim)
230 381230 rv30_weak_loop_filter(Y, s->linesize, 1, loc_lim);
231 }
232 }
233
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 218040 for(k = 0; k < 2; k++){
234 145360 int cur_cbp, top_cbp = 0;
235 145360 cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
236
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 145360 if(row)
237 135660 top_cbp = (r->cbp_chroma[mb_pos - s->mb_stride] >> (k*4)) & 0xF;
238
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 426380 for(j = 4*!row; j < 8; j += 4){
239 281020 C = s->cur_pic.data[k+1] + mb_x*8 + (row*8 + j) * s->uvlinesize;
240
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 843060 for(i = 0; i < 2; i++, C += 4){
241 562040 int ij = i + (j >> 1);
242 562040 loc_lim = 0;
243
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 562040 if (r->cbp_chroma[mb_pos] & (1 << ij))
244 129332 loc_lim = cur_lim;
245
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 432708 else if(!j && top_cbp & (1 << (ij + 2)))
246 28486 loc_lim = top_lim;
247
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 404222 else if( j && cur_cbp & (1 << (ij - 2)))
248 22304 loc_lim = cur_lim;
249
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 562040 if(loc_lim)
250 149852 rv30_weak_loop_filter(C, s->uvlinesize, 1, loc_lim);
251 }
252 }
253 }
254 }
255 3308 }
256
257 /**
258 * Initialize decoder.
259 */
260 5 static av_cold int rv30_decode_init(AVCodecContext *avctx)
261 {
262 5 RV34DecContext *r = avctx->priv_data;
263 int ret;
264
265 5 r->orig_width = avctx->coded_width;
266 5 r->orig_height = avctx->coded_height;
267
268
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 5 if (avctx->extradata_size < 2) {
269 ✗ av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
270 ✗ return AVERROR(EINVAL);
271 }
272 5 r->rv30 = 1;
273
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 5 if ((ret = ff_rv34_decode_init(avctx)) < 0)
274 ✗ return ret;
275
276 5 r->max_rpr = avctx->extradata[1] & 7;
277
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 5 if(avctx->extradata_size < 2*r->max_rpr + 8){
278 ✗ av_log(avctx, AV_LOG_WARNING, "Insufficient extradata - need at least %d bytes, got %d\n",
279 ✗ 2*r->max_rpr + 8, avctx->extradata_size);
280 }
281
282 5 r->parse_slice_header = rv30_parse_slice_header;
283 5 r->decode_intra_types = rv30_decode_intra_types;
284 5 r->decode_mb_info = rv30_decode_mb_info;
285 5 r->loop_filter = rv30_loop_filter;
286 5 r->luma_dc_quant_i = rv30_luma_dc_quant;
287 5 r->luma_dc_quant_p = rv30_luma_dc_quant;
288 5 ff_rv30dsp_init(&r->rdsp);
289 5 return 0;
290 }
291
292 const FFCodec ff_rv30_decoder = {
293 .p.name = "rv30",
294 CODEC_LONG_NAME("RealVideo 3.0"),
295 .p.type = AVMEDIA_TYPE_VIDEO,
296 .p.id = AV_CODEC_ID_RV30,
297 .priv_data_size = sizeof(RV34DecContext),
298 .init = rv30_decode_init,
299 .close = ff_rv34_decode_end,
300 FF_CODEC_DECODE_CB(ff_rv34_decode_frame),
301 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
302 AV_CODEC_CAP_FRAME_THREADS,
303 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
304 .flush = ff_mpeg_flush,
305 UPDATE_THREAD_CONTEXT(ff_rv34_decode_update_thread_context),
306 };
307