GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/pnmdec.c Lines: 104 212 49.1 %
Date: 2020-07-13 04:22:34 Branches: 41 111 36.9 %

Line Branch Exec Source
1
/*
2
 * PNM image format
3
 * Copyright (c) 2002, 2003 Fabrice Bellard
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
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21
22
#include "avcodec.h"
23
#include "internal.h"
24
#include "put_bits.h"
25
#include "pnm.h"
26
27
6427120
static void samplecpy(uint8_t *dst, const uint8_t *src, int n, int maxval)
28
{
29
6427120
    if (maxval <= 255) {
30
6419056
        memcpy(dst, src, n);
31
    } else {
32
        int i;
33
5685120
        for (i=0; i<n/2; i++) {
34
5677056
            ((uint16_t *)dst)[i] = AV_RB16(src+2*i);
35
        }
36
    }
37
6427120
}
38
39
11290
static int pnm_decode_frame(AVCodecContext *avctx, void *data,
40
                            int *got_frame, AVPacket *avpkt)
41
{
42
11290
    const uint8_t *buf   = avpkt->data;
43
11290
    int buf_size         = avpkt->size;
44
11290
    PNMContext * const s = avctx->priv_data;
45
11290
    AVFrame * const p    = data;
46
11290
    int i, j, k, n, linesize, h, upgrade = 0, is_mono = 0;
47
    unsigned char *ptr;
48
    int components, sample_len, ret;
49
    float scale;
50
51
11290
    s->bytestream_start =
52
11290
    s->bytestream       = (uint8_t *)buf;
53
11290
    s->bytestream_end   = (uint8_t *)buf + buf_size;
54
55
11290
    if ((ret = ff_pnm_decode_header(avctx, s)) < 0)
56
        return ret;
57
58
11290
    if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
59
        return ret;
60
11290
    p->pict_type = AV_PICTURE_TYPE_I;
61
11290
    p->key_frame = 1;
62
11290
    avctx->bits_per_raw_sample = av_log2(s->maxval) + 1;
63
64



11290
    switch (avctx->pix_fmt) {
65
    default:
66
        return AVERROR(EINVAL);
67
    case AV_PIX_FMT_RGBA64:
68
        n = avctx->width * 8;
69
        components=4;
70
        sample_len=16;
71
        if (s->maxval < 65535)
72
            upgrade = 2;
73
        goto do_read;
74
14
    case AV_PIX_FMT_RGB48:
75
14
        n = avctx->width * 6;
76
14
        components=3;
77
14
        sample_len=16;
78
14
        if (s->maxval < 65535)
79
            upgrade = 2;
80
14
        goto do_read;
81
14
    case AV_PIX_FMT_RGBA:
82
14
        n = avctx->width * 4;
83
14
        components=4;
84
14
        sample_len=8;
85
14
        goto do_read;
86
55
    case AV_PIX_FMT_RGB24:
87
55
        n = avctx->width * 3;
88
55
        components=3;
89
55
        sample_len=8;
90
55
        if (s->maxval < 255)
91
            upgrade = 1;
92
55
        goto do_read;
93
173
    case AV_PIX_FMT_GRAY8:
94
173
        n = avctx->width;
95
173
        components=1;
96
173
        sample_len=8;
97
173
        if (s->maxval < 255)
98
            upgrade = 1;
99
173
        goto do_read;
100
    case AV_PIX_FMT_GRAY8A:
101
        n = avctx->width * 2;
102
        components=2;
103
        sample_len=8;
104
        goto do_read;
105
14
    case AV_PIX_FMT_GRAY16:
106
14
        n = avctx->width * 2;
107
14
        components=1;
108
14
        sample_len=16;
109
14
        if (s->maxval < 65535)
110
            upgrade = 2;
111
14
        goto do_read;
112
    case AV_PIX_FMT_YA16:
113
        n =  avctx->width * 4;
114
        components=2;
115
        sample_len=16;
116
        if (s->maxval < 65535)
117
            upgrade = 2;
118
        goto do_read;
119
39
    case AV_PIX_FMT_MONOWHITE:
120
    case AV_PIX_FMT_MONOBLACK:
121
39
        n = (avctx->width + 7) >> 3;
122
39
        components=1;
123
39
        sample_len=1;
124
39
        is_mono = 1;
125
309
    do_read:
126
309
        ptr      = p->data[0];
127
309
        linesize = p->linesize[0];
128
309
        if (n * avctx->height > s->bytestream_end - s->bytestream)
129
            return AVERROR_INVALIDDATA;
130

309
        if(s->type < 4 || (is_mono && s->type==7)){
131
4046
            for (i=0; i<avctx->height; i++) {
132
                PutBitContext pb;
133
4032
                init_put_bits(&pb, ptr, linesize);
134
1423296
                for(j=0; j<avctx->width * components; j++){
135
1419264
                    unsigned int c=0;
136
1419264
                    unsigned v=0;
137
1419264
                    if(s->type < 4)
138
                    while(s->bytestream < s->bytestream_end && (*s->bytestream < '0' || *s->bytestream > '9' ))
139
                        s->bytestream++;
140
1419264
                    if(s->bytestream >= s->bytestream_end)
141
                        return AVERROR_INVALIDDATA;
142
1419264
                    if (is_mono) {
143
                        /* read a single digit */
144
1419264
                        v = (*s->bytestream++)&1;
145
                    } else {
146
                        /* read a sequence of digits */
147
                        for (k = 0; k < 6 && c <= 9; k += 1) {
148
                            v = 10*v + c;
149
                            c = (*s->bytestream++) - '0';
150
                        }
151
                        if (v > s->maxval) {
152
                            av_log(avctx, AV_LOG_ERROR, "value %d larger than maxval %d\n", v, s->maxval);
153
                            return AVERROR_INVALIDDATA;
154
                        }
155
                    }
156
1419264
                    if (sample_len == 16) {
157
                        ((uint16_t*)ptr)[j] = (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval;
158
                    } else
159
1419264
                        put_bits(&pb, sample_len, (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval);
160
                }
161
4032
                if (sample_len != 16)
162
4032
                    flush_put_bits(&pb);
163
4032
                ptr+= linesize;
164
            }
165
        }else{
166
102359
        for (i = 0; i < avctx->height; i++) {
167
102064
            if (!upgrade)
168
102064
                samplecpy(ptr, s->bytestream, n, s->maxval);
169
            else if (upgrade == 1) {
170
                unsigned int j, f = (255 * 128 + s->maxval / 2) / s->maxval;
171
                for (j = 0; j < n; j++)
172
                    ptr[j] = (s->bytestream[j] * f + 64) >> 7;
173
            } else if (upgrade == 2) {
174
                unsigned int j, v, f = (65535 * 32768 + s->maxval / 2) / s->maxval;
175
                for (j = 0; j < n / 2; j++) {
176
                    v = AV_RB16(s->bytestream + 2*j);
177
                    ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
178
                }
179
            }
180
102064
            s->bytestream += n;
181
102064
            ptr           += linesize;
182
        }
183
        }
184
309
        break;
185
10981
    case AV_PIX_FMT_YUV420P:
186
    case AV_PIX_FMT_YUV420P9:
187
    case AV_PIX_FMT_YUV420P10:
188
        {
189
            unsigned char *ptr1, *ptr2;
190
191
10981
            n        = avctx->width;
192
10981
            ptr      = p->data[0];
193
10981
            linesize = p->linesize[0];
194
10981
            if (s->maxval >= 256)
195
                n *= 2;
196
10981
            if (n * avctx->height * 3 / 2 > s->bytestream_end - s->bytestream)
197
                return AVERROR_INVALIDDATA;
198
3173509
            for (i = 0; i < avctx->height; i++) {
199
3162528
                samplecpy(ptr, s->bytestream, n, s->maxval);
200
3162528
                s->bytestream += n;
201
3162528
                ptr           += linesize;
202
            }
203
10981
            ptr1 = p->data[1];
204
10981
            ptr2 = p->data[2];
205
10981
            n >>= 1;
206
10981
            h = avctx->height >> 1;
207
1592245
            for (i = 0; i < h; i++) {
208
1581264
                samplecpy(ptr1, s->bytestream, n, s->maxval);
209
1581264
                s->bytestream += n;
210
1581264
                samplecpy(ptr2, s->bytestream, n, s->maxval);
211
1581264
                s->bytestream += n;
212
1581264
                ptr1 += p->linesize[1];
213
1581264
                ptr2 += p->linesize[2];
214
            }
215
        }
216
10981
        break;
217
    case AV_PIX_FMT_YUV420P16:
218
        {
219
            uint16_t *ptr1, *ptr2;
220
            const int f = (65535 * 32768 + s->maxval / 2) / s->maxval;
221
            unsigned int j, v;
222
223
            n        = avctx->width * 2;
224
            ptr      = p->data[0];
225
            linesize = p->linesize[0];
226
            if (n * avctx->height * 3 / 2 > s->bytestream_end - s->bytestream)
227
                return AVERROR_INVALIDDATA;
228
            for (i = 0; i < avctx->height; i++) {
229
                for (j = 0; j < n / 2; j++) {
230
                    v = AV_RB16(s->bytestream + 2*j);
231
                    ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
232
                }
233
                s->bytestream += n;
234
                ptr           += linesize;
235
            }
236
            ptr1 = (uint16_t*)p->data[1];
237
            ptr2 = (uint16_t*)p->data[2];
238
            n >>= 1;
239
            h = avctx->height >> 1;
240
            for (i = 0; i < h; i++) {
241
                for (j = 0; j < n / 2; j++) {
242
                    v = AV_RB16(s->bytestream + 2*j);
243
                    ptr1[j] = (v * f + 16384) >> 15;
244
                }
245
                s->bytestream += n;
246
247
                for (j = 0; j < n / 2; j++) {
248
                    v = AV_RB16(s->bytestream + 2*j);
249
                    ptr2[j] = (v * f + 16384) >> 15;
250
                }
251
                s->bytestream += n;
252
253
                ptr1 += p->linesize[1] / 2;
254
                ptr2 += p->linesize[2] / 2;
255
            }
256
        }
257
        break;
258
    case AV_PIX_FMT_GBRPF32:
259
        if (avctx->width * avctx->height * 12 > s->bytestream_end - s->bytestream)
260
            return AVERROR_INVALIDDATA;
261
        scale = 1.f / s->scale;
262
        if (s->endian) {
263
            float *r, *g, *b;
264
265
            r = (float *)p->data[2];
266
            g = (float *)p->data[0];
267
            b = (float *)p->data[1];
268
            for (int i = 0; i < avctx->height; i++) {
269
                for (int j = 0; j < avctx->width; j++) {
270
                    r[j] = av_int2float(AV_RL32(s->bytestream+0)) * scale;
271
                    g[j] = av_int2float(AV_RL32(s->bytestream+4)) * scale;
272
                    b[j] = av_int2float(AV_RL32(s->bytestream+8)) * scale;
273
                    s->bytestream += 12;
274
                }
275
276
                r += p->linesize[2] / 4;
277
                g += p->linesize[0] / 4;
278
                b += p->linesize[1] / 4;
279
            }
280
        } else {
281
            float *r, *g, *b;
282
283
            r = (float *)p->data[2];
284
            g = (float *)p->data[0];
285
            b = (float *)p->data[1];
286
            for (int i = 0; i < avctx->height; i++) {
287
                for (int j = 0; j < avctx->width; j++) {
288
                    r[j] = av_int2float(AV_RB32(s->bytestream+0)) * scale;
289
                    g[j] = av_int2float(AV_RB32(s->bytestream+4)) * scale;
290
                    b[j] = av_int2float(AV_RB32(s->bytestream+8)) * scale;
291
                    s->bytestream += 12;
292
                }
293
294
                r += p->linesize[2] / 4;
295
                g += p->linesize[0] / 4;
296
                b += p->linesize[1] / 4;
297
            }
298
        }
299
        break;
300
    }
301
11290
    *got_frame = 1;
302
303
11290
    return s->bytestream - s->bytestream_start;
304
}
305
306
307
#if CONFIG_PGM_DECODER
308
AVCodec ff_pgm_decoder = {
309
    .name           = "pgm",
310
    .long_name      = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
311
    .type           = AVMEDIA_TYPE_VIDEO,
312
    .id             = AV_CODEC_ID_PGM,
313
    .priv_data_size = sizeof(PNMContext),
314
    .decode         = pnm_decode_frame,
315
    .capabilities   = AV_CODEC_CAP_DR1,
316
};
317
#endif
318
319
#if CONFIG_PGMYUV_DECODER
320
AVCodec ff_pgmyuv_decoder = {
321
    .name           = "pgmyuv",
322
    .long_name      = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
323
    .type           = AVMEDIA_TYPE_VIDEO,
324
    .id             = AV_CODEC_ID_PGMYUV,
325
    .priv_data_size = sizeof(PNMContext),
326
    .decode         = pnm_decode_frame,
327
    .capabilities   = AV_CODEC_CAP_DR1,
328
};
329
#endif
330
331
#if CONFIG_PPM_DECODER
332
AVCodec ff_ppm_decoder = {
333
    .name           = "ppm",
334
    .long_name      = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
335
    .type           = AVMEDIA_TYPE_VIDEO,
336
    .id             = AV_CODEC_ID_PPM,
337
    .priv_data_size = sizeof(PNMContext),
338
    .decode         = pnm_decode_frame,
339
    .capabilities   = AV_CODEC_CAP_DR1,
340
};
341
#endif
342
343
#if CONFIG_PBM_DECODER
344
AVCodec ff_pbm_decoder = {
345
    .name           = "pbm",
346
    .long_name      = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
347
    .type           = AVMEDIA_TYPE_VIDEO,
348
    .id             = AV_CODEC_ID_PBM,
349
    .priv_data_size = sizeof(PNMContext),
350
    .decode         = pnm_decode_frame,
351
    .capabilities   = AV_CODEC_CAP_DR1,
352
};
353
#endif
354
355
#if CONFIG_PAM_DECODER
356
AVCodec ff_pam_decoder = {
357
    .name           = "pam",
358
    .long_name      = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
359
    .type           = AVMEDIA_TYPE_VIDEO,
360
    .id             = AV_CODEC_ID_PAM,
361
    .priv_data_size = sizeof(PNMContext),
362
    .decode         = pnm_decode_frame,
363
    .capabilities   = AV_CODEC_CAP_DR1,
364
};
365
#endif
366
367
#if CONFIG_PFM_DECODER
368
AVCodec ff_pfm_decoder = {
369
    .name           = "pfm",
370
    .long_name      = NULL_IF_CONFIG_SMALL("PFM (Portable FloatMap) image"),
371
    .type           = AVMEDIA_TYPE_VIDEO,
372
    .id             = AV_CODEC_ID_PFM,
373
    .priv_data_size = sizeof(PNMContext),
374
    .decode         = pnm_decode_frame,
375
    .capabilities   = AV_CODEC_CAP_DR1,
376
};
377
#endif