* PNM image format
* Copyright (c) 2002, 2003 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "pnm.h"
int c;
/* skip spaces and comments */
- for(;;) {
+ for (;;) {
c = *sc->bytestream++;
if (c == '#') {
- do {
+ do {
c = *sc->bytestream++;
} while (c != '\n' && sc->bytestream < sc->bytestream_end);
} else if (!pnm_space(c)) {
*s = '\0';
}
-int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s){
+int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
+{
char buf1[32], tuple_type[32];
int h, w, depth, maxval;
pnm_get(s, buf1, sizeof(buf1));
- if (!strcmp(buf1, "P4")) {
- avctx->pix_fmt = PIX_FMT_MONOWHITE;
- } else if (!strcmp(buf1, "P5")) {
- if (avctx->codec_id == CODEC_ID_PGMYUV)
- avctx->pix_fmt = PIX_FMT_YUV420P;
+ s->type= buf1[1]-'0';
+ if(buf1[0] != 'P')
+ return AVERROR_INVALIDDATA;
+
+ if (s->type==1 || s->type==4) {
+ avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
+ } else if (s->type==2 || s->type==5) {
+ if (avctx->codec_id == AV_CODEC_ID_PGMYUV)
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P;
else
- avctx->pix_fmt = PIX_FMT_GRAY8;
- } else if (!strcmp(buf1, "P6")) {
- avctx->pix_fmt = PIX_FMT_RGB24;
- } else if (!strcmp(buf1, "P7")) {
- w = -1;
- h = -1;
+ avctx->pix_fmt = AV_PIX_FMT_GRAY8;
+ } else if (s->type==3 || s->type==6) {
+ avctx->pix_fmt = AV_PIX_FMT_RGB24;
+ } else if (s->type==7) {
+ w = -1;
+ h = -1;
maxval = -1;
- depth = -1;
+ depth = -1;
tuple_type[0] = '\0';
- for(;;) {
+ for (;;) {
pnm_get(s, buf1, sizeof(buf1));
if (!strcmp(buf1, "WIDTH")) {
pnm_get(s, buf1, sizeof(buf1));
} else if (!strcmp(buf1, "MAXVAL")) {
pnm_get(s, buf1, sizeof(buf1));
maxval = strtol(buf1, NULL, 10);
- } else if (!strcmp(buf1, "TUPLETYPE")) {
+ } else if (!strcmp(buf1, "TUPLTYPE") ||
+ /* libavcodec used to write invalid files */
+ !strcmp(buf1, "TUPLETYPE")) {
pnm_get(s, tuple_type, sizeof(tuple_type));
} else if (!strcmp(buf1, "ENDHDR")) {
break;
} else {
- return -1;
+ return AVERROR_INVALIDDATA;
}
}
/* check that all tags are present */
- if (w <= 0 || h <= 0 || maxval <= 0 || depth <= 0 || tuple_type[0] == '\0' || avcodec_check_dimensions(avctx, w, h))
- return -1;
+ if (w <= 0 || h <= 0 || maxval <= 0 || depth <= 0 || tuple_type[0] == '\0' || av_image_check_size(w, h, 0, avctx))
+ return AVERROR_INVALIDDATA;
- avctx->width = w;
+ avctx->width = w;
avctx->height = h;
if (depth == 1) {
if (maxval == 1)
- avctx->pix_fmt = PIX_FMT_MONOWHITE;
+ avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
else
- avctx->pix_fmt = PIX_FMT_GRAY8;
+ avctx->pix_fmt = AV_PIX_FMT_GRAY8;
} else if (depth == 3) {
if (maxval < 256) {
- avctx->pix_fmt = PIX_FMT_RGB24;
+ avctx->pix_fmt = AV_PIX_FMT_RGB24;
} else {
av_log(avctx, AV_LOG_ERROR, "16-bit components are only supported for grayscale\n");
- avctx->pix_fmt = PIX_FMT_NONE;
- return -1;
+ avctx->pix_fmt = AV_PIX_FMT_NONE;
+ return AVERROR_INVALIDDATA;
}
} else if (depth == 4) {
- avctx->pix_fmt = PIX_FMT_RGB32;
+ avctx->pix_fmt = AV_PIX_FMT_RGB32;
} else {
- return -1;
+ return AVERROR_INVALIDDATA;
}
return 0;
} else {
- return -1;
+ return AVERROR_INVALIDDATA;
}
pnm_get(s, buf1, sizeof(buf1));
avctx->width = atoi(buf1);
if (avctx->width <= 0)
- return -1;
+ return AVERROR_INVALIDDATA;
pnm_get(s, buf1, sizeof(buf1));
avctx->height = atoi(buf1);
- if(avcodec_check_dimensions(avctx, avctx->width, avctx->height))
- return -1;
- if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
+ if(av_image_check_size(avctx->width, avctx->height, 0, avctx))
+ return AVERROR_INVALIDDATA;
+ if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE) {
pnm_get(s, buf1, sizeof(buf1));
s->maxval = atoi(buf1);
+ if (s->maxval <= 0) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid maxval: %d\n", s->maxval);
+ s->maxval = 255;
+ }
if (s->maxval >= 256) {
- if (avctx->pix_fmt == PIX_FMT_GRAY8) {
- avctx->pix_fmt = PIX_FMT_GRAY16BE;
+ if (avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
+ avctx->pix_fmt = AV_PIX_FMT_GRAY16BE;
if (s->maxval != 65535)
- avctx->pix_fmt = PIX_FMT_GRAY16;
- } else if (avctx->pix_fmt == PIX_FMT_RGB24) {
+ avctx->pix_fmt = AV_PIX_FMT_GRAY16;
+ } else if (avctx->pix_fmt == AV_PIX_FMT_RGB24) {
if (s->maxval > 255)
- avctx->pix_fmt = PIX_FMT_RGB48BE;
+ avctx->pix_fmt = AV_PIX_FMT_RGB48BE;
+ } else if (avctx->pix_fmt == AV_PIX_FMT_YUV420P && s->maxval < 65536) {
+ if (s->maxval < 512)
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P9BE;
+ else if (s->maxval < 1024)
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P10BE;
+ else
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
} else {
av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format\n");
- avctx->pix_fmt = PIX_FMT_NONE;
- return -1;
+ avctx->pix_fmt = AV_PIX_FMT_NONE;
+ return AVERROR_INVALIDDATA;
}
}
- }
+ }else
+ s->maxval=1;
/* more check if YUV420 */
- if (avctx->pix_fmt == PIX_FMT_YUV420P) {
+ if (av_pix_fmt_desc_get(avctx->pix_fmt)->flags & AV_PIX_FMT_FLAG_PLANAR) {
if ((avctx->width & 1) != 0)
- return -1;
+ return AVERROR_INVALIDDATA;
h = (avctx->height * 2);
if ((h % 3) != 0)
- return -1;
+ return AVERROR_INVALIDDATA;
h /= 3;
avctx->height = h;
}
projects / ffmpeg / blobdiff