pnmenc.c 13.4 KB
Newer Older
1 2
/*
 * PNM image format
3
 * Copyright (c) 2002, 2003 Fabrice Bellard
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */
#include "avcodec.h"
22
#include "bytestream.h"
23 24 25
#include "pnm.h"


26
static av_cold int common_init(AVCodecContext *avctx){
27 28 29 30 31 32 33 34 35 36
    PNMContext *s = avctx->priv_data;

    avcodec_get_frame_defaults((AVFrame*)&s->picture);
    avctx->coded_frame= (AVFrame*)&s->picture;

    return 0;
}

static int pnm_decode_frame(AVCodecContext *avctx,
                        void *data, int *data_size,
37
                        AVPacket *avpkt)
38
{
39 40
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67
    PNMContext * const s = avctx->priv_data;
    AVFrame *picture = data;
    AVFrame * const p= (AVFrame*)&s->picture;
    int i, n, linesize, h, upgrade = 0;
    unsigned char *ptr;

    s->bytestream_start=
    s->bytestream= buf;
    s->bytestream_end= buf + buf_size;

    if(ff_pnm_decode_header(avctx, s) < 0)
        return -1;

    if(p->data[0])
        avctx->release_buffer(avctx, p);

    p->reference= 0;
    if(avctx->get_buffer(avctx, p) < 0){
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
        return -1;
    }
    p->pict_type= FF_I_TYPE;
    p->key_frame= 1;

    switch(avctx->pix_fmt) {
    default:
        return -1;
68 69 70
    case PIX_FMT_RGB48BE:
        n = avctx->width * 6;
        goto do_read;
71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202
    case PIX_FMT_RGB24:
        n = avctx->width * 3;
        goto do_read;
    case PIX_FMT_GRAY8:
        n = avctx->width;
        if (s->maxval < 255)
            upgrade = 1;
        goto do_read;
    case PIX_FMT_GRAY16BE:
    case PIX_FMT_GRAY16LE:
        n = avctx->width * 2;
        if (s->maxval < 65535)
            upgrade = 2;
        goto do_read;
    case PIX_FMT_MONOWHITE:
    case PIX_FMT_MONOBLACK:
        n = (avctx->width + 7) >> 3;
    do_read:
        ptr = p->data[0];
        linesize = p->linesize[0];
        if(s->bytestream + n*avctx->height > s->bytestream_end)
            return -1;
        for(i = 0; i < avctx->height; i++) {
            if (!upgrade)
                memcpy(ptr, s->bytestream, n);
            else if (upgrade == 1) {
                unsigned int j, f = (255*128 + s->maxval/2) / s->maxval;
                for (j=0; j<n; j++)
                    ptr[j] = (s->bytestream[j] * f + 64) >> 7;
            } else if (upgrade == 2) {
                unsigned int j, v, f = (65535*32768 + s->maxval/2) / s->maxval;
                for (j=0; j<n/2; j++) {
                    v = be2me_16(((uint16_t *)s->bytestream)[j]);
                    ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
                }
            }
            s->bytestream += n;
            ptr += linesize;
        }
        break;
    case PIX_FMT_YUV420P:
        {
            unsigned char *ptr1, *ptr2;

            n = avctx->width;
            ptr = p->data[0];
            linesize = p->linesize[0];
            if(s->bytestream + n*avctx->height*3/2 > s->bytestream_end)
                return -1;
            for(i = 0; i < avctx->height; i++) {
                memcpy(ptr, s->bytestream, n);
                s->bytestream += n;
                ptr += linesize;
            }
            ptr1 = p->data[1];
            ptr2 = p->data[2];
            n >>= 1;
            h = avctx->height >> 1;
            for(i = 0; i < h; i++) {
                memcpy(ptr1, s->bytestream, n);
                s->bytestream += n;
                memcpy(ptr2, s->bytestream, n);
                s->bytestream += n;
                ptr1 += p->linesize[1];
                ptr2 += p->linesize[2];
            }
        }
        break;
    case PIX_FMT_RGB32:
        ptr = p->data[0];
        linesize = p->linesize[0];
        if(s->bytestream + avctx->width*avctx->height*4 > s->bytestream_end)
            return -1;
        for(i = 0; i < avctx->height; i++) {
            int j, r, g, b, a;

            for(j = 0;j < avctx->width; j++) {
                r = *s->bytestream++;
                g = *s->bytestream++;
                b = *s->bytestream++;
                a = *s->bytestream++;
                ((uint32_t *)ptr)[j] = (a << 24) | (r << 16) | (g << 8) | b;
            }
            ptr += linesize;
        }
        break;
    }
    *picture= *(AVFrame*)&s->picture;
    *data_size = sizeof(AVPicture);

    return s->bytestream - s->bytestream_start;
}

static int pnm_encode_frame(AVCodecContext *avctx, unsigned char *outbuf, int buf_size, void *data){
    PNMContext *s = avctx->priv_data;
    AVFrame *pict = data;
    AVFrame * const p= (AVFrame*)&s->picture;
    int i, h, h1, c, n, linesize;
    uint8_t *ptr, *ptr1, *ptr2;

    if(buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200){
        av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
        return -1;
    }

    *p = *pict;
    p->pict_type= FF_I_TYPE;
    p->key_frame= 1;

    s->bytestream_start=
    s->bytestream= outbuf;
    s->bytestream_end= outbuf+buf_size;

    h = avctx->height;
    h1 = h;
    switch(avctx->pix_fmt) {
    case PIX_FMT_MONOWHITE:
        c = '4';
        n = (avctx->width + 7) >> 3;
        break;
    case PIX_FMT_GRAY8:
        c = '5';
        n = avctx->width;
        break;
    case PIX_FMT_GRAY16BE:
        c = '5';
        n = avctx->width * 2;
        break;
    case PIX_FMT_RGB24:
        c = '6';
        n = avctx->width * 3;
        break;
203 204 205 206
    case PIX_FMT_RGB48BE:
        c = '6';
        n = avctx->width * 6;
        break;
207 208 209 210 211 212 213 214 215 216 217 218 219 220
    case PIX_FMT_YUV420P:
        c = '5';
        n = avctx->width;
        h1 = (h * 3) / 2;
        break;
    default:
        return -1;
    }
    snprintf(s->bytestream, s->bytestream_end - s->bytestream,
             "P%c\n%d %d\n",
             c, avctx->width, h1);
    s->bytestream += strlen(s->bytestream);
    if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
        snprintf(s->bytestream, s->bytestream_end - s->bytestream,
221
                 "%d\n", (avctx->pix_fmt != PIX_FMT_GRAY16BE && avctx->pix_fmt != PIX_FMT_RGB48BE) ? 255 : 65535);
222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315
        s->bytestream += strlen(s->bytestream);
    }

    ptr = p->data[0];
    linesize = p->linesize[0];
    for(i=0;i<h;i++) {
        memcpy(s->bytestream, ptr, n);
        s->bytestream += n;
        ptr += linesize;
    }

    if (avctx->pix_fmt == PIX_FMT_YUV420P) {
        h >>= 1;
        n >>= 1;
        ptr1 = p->data[1];
        ptr2 = p->data[2];
        for(i=0;i<h;i++) {
            memcpy(s->bytestream, ptr1, n);
            s->bytestream += n;
            memcpy(s->bytestream, ptr2, n);
            s->bytestream += n;
                ptr1 += p->linesize[1];
                ptr2 += p->linesize[2];
        }
    }
    return s->bytestream - s->bytestream_start;
}

static int pam_encode_frame(AVCodecContext *avctx, unsigned char *outbuf, int buf_size, void *data){
    PNMContext *s = avctx->priv_data;
    AVFrame *pict = data;
    AVFrame * const p= (AVFrame*)&s->picture;
    int i, h, w, n, linesize, depth, maxval;
    const char *tuple_type;
    uint8_t *ptr;

    if(buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200){
        av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
        return -1;
    }

    *p = *pict;
    p->pict_type= FF_I_TYPE;
    p->key_frame= 1;

    s->bytestream_start=
    s->bytestream= outbuf;
    s->bytestream_end= outbuf+buf_size;

    h = avctx->height;
    w = avctx->width;
    switch(avctx->pix_fmt) {
    case PIX_FMT_MONOWHITE:
        n = (w + 7) >> 3;
        depth = 1;
        maxval = 1;
        tuple_type = "BLACKANDWHITE";
        break;
    case PIX_FMT_GRAY8:
        n = w;
        depth = 1;
        maxval = 255;
        tuple_type = "GRAYSCALE";
        break;
    case PIX_FMT_RGB24:
        n = w * 3;
        depth = 3;
        maxval = 255;
        tuple_type = "RGB";
        break;
    case PIX_FMT_RGB32:
        n = w * 4;
        depth = 4;
        maxval = 255;
        tuple_type = "RGB_ALPHA";
        break;
    default:
        return -1;
    }
    snprintf(s->bytestream, s->bytestream_end - s->bytestream,
             "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLETYPE %s\nENDHDR\n",
             w, h, depth, maxval, tuple_type);
    s->bytestream += strlen(s->bytestream);

    ptr = p->data[0];
    linesize = p->linesize[0];

    if (avctx->pix_fmt == PIX_FMT_RGB32) {
        int j;
        unsigned int v;

        for(i=0;i<h;i++) {
            for(j=0;j<w;j++) {
                v = ((uint32_t *)ptr)[j];
316
                bytestream_put_be24(&s->bytestream, v);
317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365
                *s->bytestream++ = v >> 24;
            }
            ptr += linesize;
        }
    } else {
        for(i=0;i<h;i++) {
            memcpy(s->bytestream, ptr, n);
            s->bytestream += n;
            ptr += linesize;
        }
    }
    return s->bytestream - s->bytestream_start;
}

#if 0
static int pnm_probe(AVProbeData *pd)
{
    const char *p = pd->buf;
    if (pd->buf_size >= 8 &&
        p[0] == 'P' &&
        p[1] >= '4' && p[1] <= '6' &&
        pnm_space(p[2]) )
        return AVPROBE_SCORE_MAX - 1; /* to permit pgmyuv probe */
    else
        return 0;
}

static int pgmyuv_probe(AVProbeData *pd)
{
    if (match_ext(pd->filename, "pgmyuv"))
        return AVPROBE_SCORE_MAX;
    else
        return 0;
}

static int pam_probe(AVProbeData *pd)
{
    const char *p = pd->buf;
    if (pd->buf_size >= 8 &&
        p[0] == 'P' &&
        p[1] == '7' &&
        p[2] == '\n')
        return AVPROBE_SCORE_MAX;
    else
        return 0;
}
#endif


366 367 368 369 370 371 372 373 374 375 376 377 378 379 380
#if CONFIG_PGM_DECODER
AVCodec pgm_decoder = {
    "pgm",
    CODEC_TYPE_VIDEO,
    CODEC_ID_PGM,
    sizeof(PNMContext),
    common_init,
    NULL,
    NULL,
    pnm_decode_frame,
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_GRAY8, PIX_FMT_GRAY16BE, PIX_FMT_NONE},
    .long_name= NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
};
#endif

381
#if CONFIG_PGM_ENCODER
382 383 384 385 386 387 388
AVCodec pgm_encoder = {
    "pgm",
    CODEC_TYPE_VIDEO,
    CODEC_ID_PGM,
    sizeof(PNMContext),
    common_init,
    pnm_encode_frame,
389
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_GRAY8, PIX_FMT_GRAY16BE, PIX_FMT_NONE},
390
    .long_name= NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
391 392 393
};
#endif // CONFIG_PGM_ENCODER

394 395 396 397 398 399 400 401 402 403 404 405 406 407 408
#if CONFIG_PGMYUV_DECODER
AVCodec pgmyuv_decoder = {
    "pgmyuv",
    CODEC_TYPE_VIDEO,
    CODEC_ID_PGMYUV,
    sizeof(PNMContext),
    common_init,
    NULL,
    NULL,
    pnm_decode_frame,
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
    .long_name= NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
};
#endif

409
#if CONFIG_PGMYUV_ENCODER
410 411 412 413 414 415 416
AVCodec pgmyuv_encoder = {
    "pgmyuv",
    CODEC_TYPE_VIDEO,
    CODEC_ID_PGMYUV,
    sizeof(PNMContext),
    common_init,
    pnm_encode_frame,
417
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
418
    .long_name= NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
419 420 421
};
#endif // CONFIG_PGMYUV_ENCODER

422 423 424 425 426 427 428 429 430 431 432 433 434 435 436
#if CONFIG_PPM_DECODER
AVCodec ppm_decoder = {
    "ppm",
    CODEC_TYPE_VIDEO,
    CODEC_ID_PPM,
    sizeof(PNMContext),
    common_init,
    NULL,
    NULL,
    pnm_decode_frame,
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB48BE, PIX_FMT_NONE},
    .long_name= NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
};
#endif

437
#if CONFIG_PPM_ENCODER
438 439 440 441 442 443 444
AVCodec ppm_encoder = {
    "ppm",
    CODEC_TYPE_VIDEO,
    CODEC_ID_PPM,
    sizeof(PNMContext),
    common_init,
    pnm_encode_frame,
445
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB48BE, PIX_FMT_NONE},
446
    .long_name= NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
447 448 449
};
#endif // CONFIG_PPM_ENCODER

450 451 452 453 454 455 456 457 458 459 460 461 462 463 464
#if CONFIG_PBM_DECODER
AVCodec pbm_decoder = {
    "pbm",
    CODEC_TYPE_VIDEO,
    CODEC_ID_PBM,
    sizeof(PNMContext),
    common_init,
    NULL,
    NULL,
    pnm_decode_frame,
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_MONOWHITE, PIX_FMT_NONE},
    .long_name= NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
};
#endif

465
#if CONFIG_PBM_ENCODER
466 467 468 469 470 471 472
AVCodec pbm_encoder = {
    "pbm",
    CODEC_TYPE_VIDEO,
    CODEC_ID_PBM,
    sizeof(PNMContext),
    common_init,
    pnm_encode_frame,
473
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_MONOWHITE, PIX_FMT_NONE},
474
    .long_name= NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
475 476 477
};
#endif // CONFIG_PBM_ENCODER

478 479 480 481 482 483 484 485 486 487 488 489 490 491 492
#if CONFIG_PAM_DECODER
AVCodec pam_decoder = {
    "pam",
    CODEC_TYPE_VIDEO,
    CODEC_ID_PAM,
    sizeof(PNMContext),
    common_init,
    NULL,
    NULL,
    pnm_decode_frame,
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, PIX_FMT_NONE},
    .long_name= NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
};
#endif

493
#if CONFIG_PAM_ENCODER
494 495 496 497 498 499 500
AVCodec pam_encoder = {
    "pam",
    CODEC_TYPE_VIDEO,
    CODEC_ID_PAM,
    sizeof(PNMContext),
    common_init,
    pam_encode_frame,
501
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, PIX_FMT_NONE},
502
    .long_name= NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
503 504
};
#endif // CONFIG_PAM_ENCODER