GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/rv30.c Lines: 151 174 86.8 %
Date: 2020-08-14 10:39:37 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 "mpegutils.h"
29
#include "mpegvideo.h"
30
#include "golomb.h"
31
32
#include "rv34.h"
33
#include "rv30data.h"
34
35
36
707
static int rv30_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
37
{
38
707
    AVCodecContext *avctx = r->s.avctx;
39
    int mb_bits;
40
707
    int w = r->s.width, h = r->s.height;
41
    int mb_size;
42
    int rpr;
43
44
707
    memset(si, 0, sizeof(SliceInfo));
45
707
    if(get_bits(gb, 3))
46
1
        return -1;
47
706
    si->type = get_bits(gb, 2);
48
706
    if(si->type == 1) si->type = 0;
49
706
    if(get_bits1(gb))
50
        return -1;
51
706
    si->quant = get_bits(gb, 5);
52
706
    skip_bits1(gb);
53
706
    si->pts = get_bits(gb, 13);
54
706
    rpr = get_bits(gb, av_log2(r->max_rpr) + 1);
55
706
    if(rpr){
56
        if (rpr > r->max_rpr) {
57
            av_log(avctx, AV_LOG_ERROR, "rpr too large\n");
58
            return AVERROR_INVALIDDATA;
59
        }
60
61
        if (avctx->extradata_size < rpr * 2 + 8) {
62
            av_log(avctx, AV_LOG_ERROR,
63
                   "Insufficient extradata - need at least %d bytes, got %d\n",
64
                   8 + rpr * 2, avctx->extradata_size);
65
            return AVERROR(EINVAL);
66
        }
67
68
        w = r->s.avctx->extradata[6 + rpr*2] << 2;
69
        h = r->s.avctx->extradata[7 + rpr*2] << 2;
70
    } else {
71
706
        w = r->orig_width;
72
706
        h = r->orig_height;
73
    }
74
706
    si->width  = w;
75
706
    si->height = h;
76
706
    mb_size = ((w + 15) >> 4) * ((h + 15) >> 4);
77
706
    mb_bits = ff_rv34_get_start_offset(gb, mb_size);
78
706
    si->start = get_bits(gb, mb_bits);
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
13695
    for(i = 0; i < 4; i++, dst += r->intra_types_stride - 4){
91
32868
        for(j = 0; j < 4; j+= 2){
92
21912
            unsigned code = get_interleaved_ue_golomb(gb) << 1;
93
21912
            if (code > 80U*2U) {
94
                av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction code\n");
95
                return -1;
96
            }
97
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
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
68640
    if (code > 11) {
123
        av_log(s->avctx, AV_LOG_ERROR, "Incorrect MB type code\n");
124
        return -1;
125
    }
126
68640
    if(code > 5){
127
        av_log(s->avctx, AV_LOG_ERROR, "dquant needed\n");
128
        code -= 6;
129
    }
130
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
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
75988
    for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
161
72680
        int mbtype = s->current_picture_ptr->mb_type[mb_pos];
162

72680
        if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype))
163
9106
            r->deblock_coefs[mb_pos] = 0xFFFF;
164
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
75988
    for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
173
72680
        cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
174
72680
        if(mb_x)
175
69372
            left_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - 1]];
176
363400
        for(j = 0; j < 16; j += 4){
177
290720
            Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize + 4 * !mb_x;
178
1440368
            for(i = !mb_x; i < 4; i++, Y += 4){
179
1149648
                int ij = i + j;
180
1149648
                loc_lim = 0;
181
1149648
                if(r->deblock_coefs[mb_pos] & (1 << ij))
182
351712
                    loc_lim = cur_lim;
183

797936
                else if(!i && r->deblock_coefs[mb_pos - 1] & (1 << (ij + 3)))
184
14120
                    loc_lim = left_lim;
185

783816
                else if( i && r->deblock_coefs[mb_pos]     & (1 << (ij - 1)))
186
38450
                    loc_lim = cur_lim;
187
1149648
                if(loc_lim)
188
373358
                    rv30_weak_loop_filter(Y, 1, s->linesize, loc_lim);
189
            }
190
        }
191
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
145360
            if(mb_x)
195
138744
                left_cbp = (r->cbp_chroma[mb_pos - 1] >> (k*4)) & 0xF;
196
436080
            for(j = 0; j < 8; j += 4){
197
290720
                C = s->current_picture_ptr->f->data[k + 1] + mb_x*8 + (row*8 + j) * s->uvlinesize + 4 * !mb_x;
198
858928
                for(i = !mb_x; i < 2; i++, C += 4){
199
568208
                    int ij = i + (j >> 1);
200
568208
                    loc_lim = 0;
201
568208
                    if (cur_cbp & (1 << ij))
202
132602
                        loc_lim = cur_lim;
203

435606
                    else if(!i && left_cbp & (1 << (ij + 1)))
204
24668
                        loc_lim = left_lim;
205

410938
                    else if( i && cur_cbp  & (1 << (ij - 1)))
206
16738
                        loc_lim = cur_lim;
207
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
75988
    for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
215
72680
        cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
216
72680
        if(row)
217
67830
            top_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - s->mb_stride]];
218

358550
        for(j = 4*!row; j < 16; j += 4){
219
285870
            Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize;
220
1429350
            for(i = 0; i < 4; i++, Y += 4){
221
1143480
                int ij = i + j;
222
1143480
                loc_lim = 0;
223
1143480
                if(r->deblock_coefs[mb_pos] & (1 << ij))
224
350204
                    loc_lim = cur_lim;
225

793276
                else if(!j && r->deblock_coefs[mb_pos - s->mb_stride] & (1 << (ij + 12)))
226
15928
                    loc_lim = top_lim;
227

777348
                else if( j && r->deblock_coefs[mb_pos]                & (1 << (ij - 4)))
228
45866
                    loc_lim = cur_lim;
229
1143480
                if(loc_lim)
230
381230
                    rv30_weak_loop_filter(Y, s->linesize, 1, loc_lim);
231
            }
232
        }
233
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
145360
            if(row)
237
135660
                top_cbp = (r->cbp_chroma[mb_pos - s->mb_stride] >> (k*4)) & 0xF;
238

426380
            for(j = 4*!row; j < 8; j += 4){
239
281020
                C = s->current_picture_ptr->f->data[k+1] + mb_x*8 + (row*8 + j) * s->uvlinesize;
240
843060
                for(i = 0; i < 2; i++, C += 4){
241
562040
                    int ij = i + (j >> 1);
242
562040
                    loc_lim = 0;
243
562040
                    if (r->cbp_chroma[mb_pos] & (1 << ij))
244
129332
                        loc_lim = cur_lim;
245

432708
                    else if(!j && top_cbp & (1 << (ij + 2)))
246
28486
                        loc_lim = top_lim;
247

404222
                    else if( j && cur_cbp & (1 << (ij - 2)))
248
22304
                        loc_lim = cur_lim;
249
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
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
5
    if ((ret = ff_rv34_decode_init(avctx)) < 0)
274
        return ret;
275
276
5
    r->max_rpr = avctx->extradata[1] & 7;
277
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
    return 0;
289
}
290
291
AVCodec ff_rv30_decoder = {
292
    .name                  = "rv30",
293
    .long_name             = NULL_IF_CONFIG_SMALL("RealVideo 3.0"),
294
    .type                  = AVMEDIA_TYPE_VIDEO,
295
    .id                    = AV_CODEC_ID_RV30,
296
    .priv_data_size        = sizeof(RV34DecContext),
297
    .init                  = rv30_decode_init,
298
    .close                 = ff_rv34_decode_end,
299
    .decode                = ff_rv34_decode_frame,
300
    .capabilities          = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
301
                             AV_CODEC_CAP_FRAME_THREADS,
302
    .flush                 = ff_mpeg_flush,
303
    .pix_fmts              = (const enum AVPixelFormat[]) {
304
        AV_PIX_FMT_YUV420P,
305
        AV_PIX_FMT_NONE
306
    },
307
    .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_update_thread_context),
308
    .caps_internal         = FF_CODEC_CAP_ALLOCATE_PROGRESS,
309
};