GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/pnmdec.c Lines: 104 182 57.1 %
Date: 2019-11-18 18:00:01 Branches: 41 98 41.8 %

Line Branch Exec Source
1
/*
2
 * PNM image format
3
 * Copyright (c) 2002, 2003 Fabrice Bellard
4
 *
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 * This file is part of FFmpeg.
6
 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * 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
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 */
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22
#include "avcodec.h"
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#include "internal.h"
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#include "put_bits.h"
25
#include "pnm.h"
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27
6337264
static void samplecpy(uint8_t *dst, const uint8_t *src, int n, int maxval)
28
{
29
6337264
    if (maxval <= 255) {
30
6329200
        memcpy(dst, src, n);
31
    } else {
32
        int i;
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5685120
        for (i=0; i<n/2; i++) {
34
5677056
            ((uint16_t *)dst)[i] = AV_RB16(src+2*i);
35
        }
36
    }
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6337264
}
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39
11134
static int pnm_decode_frame(AVCodecContext *avctx, void *data,
40
                            int *got_frame, AVPacket *avpkt)
41
{
42
11134
    const uint8_t *buf   = avpkt->data;
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11134
    int buf_size         = avpkt->size;
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11134
    PNMContext * const s = avctx->priv_data;
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11134
    AVFrame * const p    = data;
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11134
    int i, j, k, n, linesize, h, upgrade = 0, is_mono = 0;
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    unsigned char *ptr;
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    int components, sample_len, ret;
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50
11134
    s->bytestream_start =
51
11134
    s->bytestream       = (uint8_t *)buf;
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11134
    s->bytestream_end   = (uint8_t *)buf + buf_size;
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54
11134
    if ((ret = ff_pnm_decode_header(avctx, s)) < 0)
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        return ret;
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57
11134
    if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
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        return ret;
59
11134
    p->pict_type = AV_PICTURE_TYPE_I;
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11134
    p->key_frame = 1;
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11134
    avctx->bits_per_raw_sample = av_log2(s->maxval) + 1;
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63



11134
    switch (avctx->pix_fmt) {
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    default:
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        return AVERROR(EINVAL);
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    case AV_PIX_FMT_RGBA64:
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        n = avctx->width * 8;
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        components=4;
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        sample_len=16;
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        if (s->maxval < 65535)
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            upgrade = 2;
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        goto do_read;
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14
    case AV_PIX_FMT_RGB48:
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14
        n = avctx->width * 6;
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14
        components=3;
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14
        sample_len=16;
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14
        if (s->maxval < 65535)
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            upgrade = 2;
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14
        goto do_read;
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14
    case AV_PIX_FMT_RGBA:
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14
        n = avctx->width * 4;
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14
        components=4;
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14
        sample_len=8;
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14
        goto do_read;
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55
    case AV_PIX_FMT_RGB24:
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55
        n = avctx->width * 3;
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55
        components=3;
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55
        sample_len=8;
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55
        if (s->maxval < 255)
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            upgrade = 1;
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55
        goto do_read;
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173
    case AV_PIX_FMT_GRAY8:
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173
        n = avctx->width;
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173
        components=1;
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173
        sample_len=8;
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173
        if (s->maxval < 255)
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            upgrade = 1;
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173
        goto do_read;
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    case AV_PIX_FMT_GRAY8A:
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        n = avctx->width * 2;
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        components=2;
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        sample_len=8;
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        goto do_read;
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14
    case AV_PIX_FMT_GRAY16:
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14
        n = avctx->width * 2;
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14
        components=1;
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14
        sample_len=16;
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14
        if (s->maxval < 65535)
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            upgrade = 2;
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14
        goto do_read;
111
    case AV_PIX_FMT_YA16:
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        n =  avctx->width * 4;
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        components=2;
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        sample_len=16;
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        if (s->maxval < 65535)
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            upgrade = 2;
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        goto do_read;
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39
    case AV_PIX_FMT_MONOWHITE:
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    case AV_PIX_FMT_MONOBLACK:
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39
        n = (avctx->width + 7) >> 3;
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39
        components=1;
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39
        sample_len=1;
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39
        is_mono = 1;
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309
    do_read:
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309
        ptr      = p->data[0];
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309
        linesize = p->linesize[0];
127
309
        if (n * avctx->height > s->bytestream_end - s->bytestream)
128
            return AVERROR_INVALIDDATA;
129

309
        if(s->type < 4 || (is_mono && s->type==7)){
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4046
            for (i=0; i<avctx->height; i++) {
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                PutBitContext pb;
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4032
                init_put_bits(&pb, ptr, linesize);
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1423296
                for(j=0; j<avctx->width * components; j++){
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1419264
                    unsigned int c=0;
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1419264
                    int v=0;
136
1419264
                    if(s->type < 4)
137
                    while(s->bytestream < s->bytestream_end && (*s->bytestream < '0' || *s->bytestream > '9' ))
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                        s->bytestream++;
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1419264
                    if(s->bytestream >= s->bytestream_end)
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                        return AVERROR_INVALIDDATA;
141
1419264
                    if (is_mono) {
142
                        /* read a single digit */
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1419264
                        v = (*s->bytestream++)&1;
144
                    } else {
145
                        /* read a sequence of digits */
146
                        for (k = 0; k < 5 && c <= 9; k += 1) {
147
                            v = 10*v + c;
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                            c = (*s->bytestream++) - '0';
149
                        }
150
                        if (v > s->maxval) {
151
                            av_log(avctx, AV_LOG_ERROR, "value %d larger than maxval %d\n", v, s->maxval);
152
                            return AVERROR_INVALIDDATA;
153
                        }
154
                    }
155
1419264
                    if (sample_len == 16) {
156
                        ((uint16_t*)ptr)[j] = (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval;
157
                    } else
158
1419264
                        put_bits(&pb, sample_len, (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval);
159
                }
160
4032
                if (sample_len != 16)
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4032
                    flush_put_bits(&pb);
162
4032
                ptr+= linesize;
163
            }
164
        }else{
165
102359
        for (i = 0; i < avctx->height; i++) {
166
102064
            if (!upgrade)
167
102064
                samplecpy(ptr, s->bytestream, n, s->maxval);
168
            else if (upgrade == 1) {
169
                unsigned int j, f = (255 * 128 + s->maxval / 2) / s->maxval;
170
                for (j = 0; j < n; j++)
171
                    ptr[j] = (s->bytestream[j] * f + 64) >> 7;
172
            } else if (upgrade == 2) {
173
                unsigned int j, v, f = (65535 * 32768 + s->maxval / 2) / s->maxval;
174
                for (j = 0; j < n / 2; j++) {
175
                    v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
176
                    ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
177
                }
178
            }
179
102064
            s->bytestream += n;
180
102064
            ptr           += linesize;
181
        }
182
        }
183
309
        break;
184
10825
    case AV_PIX_FMT_YUV420P:
185
    case AV_PIX_FMT_YUV420P9:
186
    case AV_PIX_FMT_YUV420P10:
187
        {
188
            unsigned char *ptr1, *ptr2;
189
190
10825
            n        = avctx->width;
191
10825
            ptr      = p->data[0];
192
10825
            linesize = p->linesize[0];
193
10825
            if (s->maxval >= 256)
194
                n *= 2;
195
10825
            if (n * avctx->height * 3 / 2 > s->bytestream_end - s->bytestream)
196
                return AVERROR_INVALIDDATA;
197
3128425
            for (i = 0; i < avctx->height; i++) {
198
3117600
                samplecpy(ptr, s->bytestream, n, s->maxval);
199
3117600
                s->bytestream += n;
200
3117600
                ptr           += linesize;
201
            }
202
10825
            ptr1 = p->data[1];
203
10825
            ptr2 = p->data[2];
204
10825
            n >>= 1;
205
10825
            h = avctx->height >> 1;
206
1569625
            for (i = 0; i < h; i++) {
207
1558800
                samplecpy(ptr1, s->bytestream, n, s->maxval);
208
1558800
                s->bytestream += n;
209
1558800
                samplecpy(ptr2, s->bytestream, n, s->maxval);
210
1558800
                s->bytestream += n;
211
1558800
                ptr1 += p->linesize[1];
212
1558800
                ptr2 += p->linesize[2];
213
            }
214
        }
215
10825
        break;
216
    case AV_PIX_FMT_YUV420P16:
217
        {
218
            uint16_t *ptr1, *ptr2;
219
            const int f = (65535 * 32768 + s->maxval / 2) / s->maxval;
220
            unsigned int j, v;
221
222
            n        = avctx->width * 2;
223
            ptr      = p->data[0];
224
            linesize = p->linesize[0];
225
            if (n * avctx->height * 3 / 2 > s->bytestream_end - s->bytestream)
226
                return AVERROR_INVALIDDATA;
227
            for (i = 0; i < avctx->height; i++) {
228
                for (j = 0; j < n / 2; j++) {
229
                    v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
230
                    ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
231
                }
232
                s->bytestream += n;
233
                ptr           += linesize;
234
            }
235
            ptr1 = (uint16_t*)p->data[1];
236
            ptr2 = (uint16_t*)p->data[2];
237
            n >>= 1;
238
            h = avctx->height >> 1;
239
            for (i = 0; i < h; i++) {
240
                for (j = 0; j < n / 2; j++) {
241
                    v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
242
                    ptr1[j] = (v * f + 16384) >> 15;
243
                }
244
                s->bytestream += n;
245
246
                for (j = 0; j < n / 2; j++) {
247
                    v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
248
                    ptr2[j] = (v * f + 16384) >> 15;
249
                }
250
                s->bytestream += n;
251
252
                ptr1 += p->linesize[1] / 2;
253
                ptr2 += p->linesize[2] / 2;
254
            }
255
        }
256
        break;
257
    }
258
11134
    *got_frame = 1;
259
260
11134
    return s->bytestream - s->bytestream_start;
261
}
262
263
264
#if CONFIG_PGM_DECODER
265
AVCodec ff_pgm_decoder = {
266
    .name           = "pgm",
267
    .long_name      = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
268
    .type           = AVMEDIA_TYPE_VIDEO,
269
    .id             = AV_CODEC_ID_PGM,
270
    .priv_data_size = sizeof(PNMContext),
271
    .decode         = pnm_decode_frame,
272
    .capabilities   = AV_CODEC_CAP_DR1,
273
};
274
#endif
275
276
#if CONFIG_PGMYUV_DECODER
277
AVCodec ff_pgmyuv_decoder = {
278
    .name           = "pgmyuv",
279
    .long_name      = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
280
    .type           = AVMEDIA_TYPE_VIDEO,
281
    .id             = AV_CODEC_ID_PGMYUV,
282
    .priv_data_size = sizeof(PNMContext),
283
    .decode         = pnm_decode_frame,
284
    .capabilities   = AV_CODEC_CAP_DR1,
285
};
286
#endif
287
288
#if CONFIG_PPM_DECODER
289
AVCodec ff_ppm_decoder = {
290
    .name           = "ppm",
291
    .long_name      = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
292
    .type           = AVMEDIA_TYPE_VIDEO,
293
    .id             = AV_CODEC_ID_PPM,
294
    .priv_data_size = sizeof(PNMContext),
295
    .decode         = pnm_decode_frame,
296
    .capabilities   = AV_CODEC_CAP_DR1,
297
};
298
#endif
299
300
#if CONFIG_PBM_DECODER
301
AVCodec ff_pbm_decoder = {
302
    .name           = "pbm",
303
    .long_name      = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
304
    .type           = AVMEDIA_TYPE_VIDEO,
305
    .id             = AV_CODEC_ID_PBM,
306
    .priv_data_size = sizeof(PNMContext),
307
    .decode         = pnm_decode_frame,
308
    .capabilities   = AV_CODEC_CAP_DR1,
309
};
310
#endif
311
312
#if CONFIG_PAM_DECODER
313
AVCodec ff_pam_decoder = {
314
    .name           = "pam",
315
    .long_name      = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
316
    .type           = AVMEDIA_TYPE_VIDEO,
317
    .id             = AV_CODEC_ID_PAM,
318
    .priv_data_size = sizeof(PNMContext),
319
    .decode         = pnm_decode_frame,
320
    .capabilities   = AV_CODEC_CAP_DR1,
321
};
322
#endif