2004-11-11 20:09:28 +02:00
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/*
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* PNM image format
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2009-01-19 17:46:40 +02:00
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* Copyright (c) 2002, 2003 Fabrice Bellard
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2004-11-11 20:09:28 +02:00
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*
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2006-10-07 18:30:46 +03:00
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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2004-11-11 20:09:28 +02:00
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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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2006-10-07 18:30:46 +03:00
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* version 2.1 of the License, or (at your option) any later version.
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2004-11-11 20:09:28 +02:00
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*
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2006-10-07 18:30:46 +03:00
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* FFmpeg is distributed in the hope that it will be useful,
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2004-11-11 20:09:28 +02:00
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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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2006-10-07 18:30:46 +03:00
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* License along with FFmpeg; if not, write to the Free Software
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2006-01-13 00:43:26 +02:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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2004-11-11 20:09:28 +02:00
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*/
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2009-10-27 18:57:35 +02:00
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2012-08-06 16:49:32 +03:00
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#include <stdlib.h>
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#include <string.h>
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2011-02-07 15:37:08 +02:00
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#include "libavutil/imgutils.h"
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2004-11-11 20:09:28 +02:00
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#include "avcodec.h"
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2007-05-11 02:03:14 +03:00
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#include "pnm.h"
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2004-11-11 20:09:28 +02:00
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2007-05-11 12:28:07 +03:00
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static inline int pnm_space(int c)
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{
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2008-05-06 12:16:36 +03:00
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return c == ' ' || c == '\n' || c == '\r' || c == '\t';
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2004-11-11 20:09:28 +02:00
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}
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2007-05-11 12:28:07 +03:00
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static void pnm_get(PNMContext *sc, char *str, int buf_size)
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2004-11-13 00:55:29 +02:00
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{
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2007-05-11 12:28:07 +03:00
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char *s;
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int c;
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/* skip spaces and comments */
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2012-08-07 21:57:40 +03:00
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while (sc->bytestream < sc->bytestream_end) {
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2007-05-11 12:28:07 +03:00
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c = *sc->bytestream++;
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if (c == '#') {
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2012-08-07 21:57:40 +03:00
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while (c != '\n' && sc->bytestream < sc->bytestream_end) {
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2007-05-11 12:28:07 +03:00
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c = *sc->bytestream++;
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2012-08-07 21:57:40 +03:00
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}
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2007-05-11 12:28:07 +03:00
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} else if (!pnm_space(c)) {
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break;
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}
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2004-11-11 20:09:28 +02:00
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}
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2005-12-17 20:14:38 +02:00
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2007-05-11 12:28:07 +03:00
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s = str;
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while (sc->bytestream < sc->bytestream_end && !pnm_space(c)) {
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if ((s - str) < buf_size - 1)
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*s++ = c;
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c = *sc->bytestream++;
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}
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*s = '\0';
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}
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2004-11-11 20:09:28 +02:00
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2009-10-27 18:57:35 +02:00
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int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
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{
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2007-05-11 12:28:07 +03:00
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char buf1[32], tuple_type[32];
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int h, w, depth, maxval;
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pnm_get(s, buf1, sizeof(buf1));
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2009-12-01 18:56:13 +02:00
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if(buf1[0] != 'P')
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2012-11-16 13:45:34 +03:00
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return AVERROR_INVALIDDATA;
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2014-08-03 15:01:03 +03:00
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s->type= buf1[1]-'0';
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2009-12-01 18:56:13 +02:00
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if (s->type==1 || s->type==4) {
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2012-10-06 13:10:34 +03:00
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avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
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2009-12-01 18:56:13 +02:00
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} else if (s->type==2 || s->type==5) {
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2012-08-05 12:11:04 +03:00
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if (avctx->codec_id == AV_CODEC_ID_PGMYUV)
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2012-10-06 13:10:34 +03:00
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avctx->pix_fmt = AV_PIX_FMT_YUV420P;
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2007-05-11 12:28:07 +03:00
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else
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2012-10-06 13:10:34 +03:00
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avctx->pix_fmt = AV_PIX_FMT_GRAY8;
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2009-12-01 18:56:13 +02:00
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} else if (s->type==3 || s->type==6) {
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2012-10-06 13:10:34 +03:00
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avctx->pix_fmt = AV_PIX_FMT_RGB24;
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2009-12-01 18:56:13 +02:00
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} else if (s->type==7) {
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2009-10-27 18:57:35 +02:00
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w = -1;
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h = -1;
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2007-05-11 12:28:07 +03:00
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maxval = -1;
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2009-10-27 18:57:35 +02:00
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depth = -1;
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2007-05-11 12:28:07 +03:00
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tuple_type[0] = '\0';
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2009-10-27 18:57:35 +02:00
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for (;;) {
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2007-05-11 12:28:07 +03:00
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pnm_get(s, buf1, sizeof(buf1));
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if (!strcmp(buf1, "WIDTH")) {
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pnm_get(s, buf1, sizeof(buf1));
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w = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "HEIGHT")) {
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pnm_get(s, buf1, sizeof(buf1));
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h = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "DEPTH")) {
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pnm_get(s, buf1, sizeof(buf1));
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depth = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "MAXVAL")) {
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pnm_get(s, buf1, sizeof(buf1));
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maxval = strtol(buf1, NULL, 10);
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2011-12-28 07:54:59 +03:00
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} else if (!strcmp(buf1, "TUPLTYPE") ||
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2011-12-28 07:54:59 +03:00
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/* libavcodec used to write invalid files */
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2011-12-28 07:54:59 +03:00
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!strcmp(buf1, "TUPLETYPE")) {
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2007-05-11 12:28:07 +03:00
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pnm_get(s, tuple_type, sizeof(tuple_type));
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} else if (!strcmp(buf1, "ENDHDR")) {
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break;
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} else {
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2012-11-16 13:45:34 +03:00
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return AVERROR_INVALIDDATA;
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2004-11-11 20:09:28 +02:00
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}
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}
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2007-05-11 12:28:07 +03:00
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/* check that all tags are present */
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2016-11-10 21:31:02 +02:00
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if (w <= 0 || h <= 0 || maxval <= 0 || maxval > UINT16_MAX || depth <= 0 || tuple_type[0] == '\0' ||
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av_image_check_size(w, h, 0, avctx) || s->bytestream >= s->bytestream_end)
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2012-11-16 13:45:34 +03:00
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return AVERROR_INVALIDDATA;
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2004-11-13 01:38:43 +02:00
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2009-10-27 18:57:35 +02:00
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avctx->width = w;
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2007-05-11 12:28:07 +03:00
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avctx->height = h;
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2011-12-28 07:59:39 +03:00
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s->maxval = maxval;
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2007-05-11 12:28:07 +03:00
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if (depth == 1) {
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2012-01-05 22:57:49 +03:00
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if (maxval == 1) {
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2012-10-08 21:54:00 +03:00
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avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;
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2013-07-28 19:12:23 +03:00
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} else if (maxval < 256) {
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2012-10-06 13:10:34 +03:00
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avctx->pix_fmt = AV_PIX_FMT_GRAY8;
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2012-01-07 21:23:21 +03:00
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} else {
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2013-08-03 15:14:55 +03:00
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avctx->pix_fmt = AV_PIX_FMT_GRAY16;
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2012-01-05 22:57:49 +03:00
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}
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2012-01-17 02:37:20 +03:00
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} else if (depth == 2) {
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2015-01-22 02:49:04 +02:00
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if (maxval < 256) {
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2012-10-08 21:54:00 +03:00
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avctx->pix_fmt = AV_PIX_FMT_GRAY8A;
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2015-01-22 02:49:04 +02:00
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} else {
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avctx->pix_fmt = AV_PIX_FMT_YA16;
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}
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2007-05-11 12:28:07 +03:00
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} else if (depth == 3) {
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2008-09-14 18:50:59 +03:00
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if (maxval < 256) {
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2012-11-05 02:35:09 +03:00
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avctx->pix_fmt = AV_PIX_FMT_RGB24;
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2008-09-14 18:50:59 +03:00
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} else {
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2013-08-03 15:14:55 +03:00
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avctx->pix_fmt = AV_PIX_FMT_RGB48;
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2008-09-14 18:50:59 +03:00
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}
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2007-05-11 12:28:07 +03:00
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} else if (depth == 4) {
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2012-01-06 03:25:54 +03:00
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if (maxval < 256) {
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2012-10-08 21:54:00 +03:00
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avctx->pix_fmt = AV_PIX_FMT_RGBA;
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2012-01-06 03:25:54 +03:00
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} else {
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2013-08-03 15:14:55 +03:00
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avctx->pix_fmt = AV_PIX_FMT_RGBA64;
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2012-01-06 03:25:54 +03:00
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}
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2007-05-11 12:28:07 +03:00
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} else {
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2012-11-16 13:45:34 +03:00
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return AVERROR_INVALIDDATA;
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2004-11-13 01:38:43 +02:00
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}
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2007-05-11 12:28:07 +03:00
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return 0;
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} else {
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2012-11-16 13:45:34 +03:00
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return AVERROR_INVALIDDATA;
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2005-01-12 02:16:25 +02:00
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}
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2007-05-11 12:28:07 +03:00
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pnm_get(s, buf1, sizeof(buf1));
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2012-08-07 21:58:25 +03:00
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w = atoi(buf1);
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2007-05-11 12:28:07 +03:00
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pnm_get(s, buf1, sizeof(buf1));
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2012-08-07 21:58:25 +03:00
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h = atoi(buf1);
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if(w <= 0 || h <= 0 || av_image_check_size(w, h, 0, avctx) || s->bytestream >= s->bytestream_end)
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2012-11-16 13:45:34 +03:00
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return AVERROR_INVALIDDATA;
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2012-08-07 21:58:25 +03:00
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avctx->width = w;
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avctx->height = h;
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2012-10-08 21:54:00 +03:00
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if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE && avctx->pix_fmt != AV_PIX_FMT_MONOBLACK) {
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2007-05-11 12:28:07 +03:00
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pnm_get(s, buf1, sizeof(buf1));
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s->maxval = atoi(buf1);
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2016-11-10 21:31:02 +02:00
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if (s->maxval <= 0 || s->maxval > UINT16_MAX) {
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2011-01-10 02:42:57 +02:00
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av_log(avctx, AV_LOG_ERROR, "Invalid maxval: %d\n", s->maxval);
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2011-01-11 00:09:52 +02:00
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s->maxval = 255;
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2011-01-10 02:42:57 +02:00
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}
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2008-09-14 18:50:59 +03:00
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if (s->maxval >= 256) {
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2012-10-06 13:10:34 +03:00
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if (avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
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2013-08-03 15:14:55 +03:00
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avctx->pix_fmt = AV_PIX_FMT_GRAY16;
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2012-10-06 13:10:34 +03:00
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} else if (avctx->pix_fmt == AV_PIX_FMT_RGB24) {
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2013-08-03 15:14:55 +03:00
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avctx->pix_fmt = AV_PIX_FMT_RGB48;
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2013-02-22 13:57:59 +03:00
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} else if (avctx->pix_fmt == AV_PIX_FMT_YUV420P && s->maxval < 65536) {
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if (s->maxval < 512)
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2013-08-03 15:14:55 +03:00
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avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
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2013-02-22 13:57:59 +03:00
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else if (s->maxval < 1024)
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2013-08-03 15:14:55 +03:00
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avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
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2013-02-22 13:57:59 +03:00
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else
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avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
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2008-09-14 18:50:59 +03:00
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} else {
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2009-02-22 02:56:55 +02:00
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av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format\n");
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2012-10-06 13:10:34 +03:00
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avctx->pix_fmt = AV_PIX_FMT_NONE;
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2012-11-16 13:45:34 +03:00
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return AVERROR_INVALIDDATA;
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2008-09-14 18:50:59 +03:00
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}
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2004-11-11 20:09:28 +02:00
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}
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2009-12-01 18:56:13 +02:00
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}else
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s->maxval=1;
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2007-05-11 12:28:07 +03:00
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/* more check if YUV420 */
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2013-05-12 16:41:49 +03:00
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if (av_pix_fmt_desc_get(avctx->pix_fmt)->flags & AV_PIX_FMT_FLAG_PLANAR) {
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2007-05-11 12:28:07 +03:00
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if ((avctx->width & 1) != 0)
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2012-11-16 13:45:34 +03:00
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return AVERROR_INVALIDDATA;
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2007-05-11 12:28:07 +03:00
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h = (avctx->height * 2);
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if ((h % 3) != 0)
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2012-11-16 13:45:34 +03:00
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return AVERROR_INVALIDDATA;
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2007-05-11 12:28:07 +03:00
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h /= 3;
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avctx->height = h;
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2004-11-11 20:09:28 +02:00
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}
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2007-05-11 12:28:07 +03:00
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return 0;
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2004-11-11 20:09:28 +02:00
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}
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