mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
cb243972b1
Most of these were found through code review in response to fixing 1466/clusterfuzz-testcase-minimized-5961584419536896 There is thus no testcase for most of this. The initial issue was Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
444 lines
14 KiB
C
444 lines
14 KiB
C
/*
|
|
* XPM image format
|
|
*
|
|
* Copyright (c) 2012 Paul B Mahol
|
|
* Copyright (c) 2017 Paras Chadha
|
|
*
|
|
* 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 "libavutil/parseutils.h"
|
|
#include "libavutil/avstring.h"
|
|
#include "avcodec.h"
|
|
#include "internal.h"
|
|
|
|
typedef struct XPMContext {
|
|
uint32_t *pixels;
|
|
int pixels_size;
|
|
uint8_t *buf;
|
|
int buf_size;
|
|
} XPMDecContext;
|
|
|
|
typedef struct ColorEntry {
|
|
const char *name; ///< a string representing the name of the color
|
|
uint32_t rgb_color; ///< RGB values for the color
|
|
} ColorEntry;
|
|
|
|
static int color_table_compare(const void *lhs, const void *rhs)
|
|
{
|
|
return av_strcasecmp(lhs, ((const ColorEntry *)rhs)->name);
|
|
}
|
|
|
|
static const ColorEntry color_table[] = {
|
|
{ "AliceBlue", 0xFFF0F8FF },
|
|
{ "AntiqueWhite", 0xFFFAEBD7 },
|
|
{ "Aqua", 0xFF00FFFF },
|
|
{ "Aquamarine", 0xFF7FFFD4 },
|
|
{ "Azure", 0xFFF0FFFF },
|
|
{ "Beige", 0xFFF5F5DC },
|
|
{ "Bisque", 0xFFFFE4C4 },
|
|
{ "Black", 0xFF000000 },
|
|
{ "BlanchedAlmond", 0xFFFFEBCD },
|
|
{ "Blue", 0xFF0000FF },
|
|
{ "BlueViolet", 0xFF8A2BE2 },
|
|
{ "Brown", 0xFFA52A2A },
|
|
{ "BurlyWood", 0xFFDEB887 },
|
|
{ "CadetBlue", 0xFF5F9EA0 },
|
|
{ "Chartreuse", 0xFF7FFF00 },
|
|
{ "Chocolate", 0xFFD2691E },
|
|
{ "Coral", 0xFFFF7F50 },
|
|
{ "CornflowerBlue", 0xFF6495ED },
|
|
{ "Cornsilk", 0xFFFFF8DC },
|
|
{ "Crimson", 0xFFDC143C },
|
|
{ "Cyan", 0xFF00FFFF },
|
|
{ "DarkBlue", 0xFF00008B },
|
|
{ "DarkCyan", 0xFF008B8B },
|
|
{ "DarkGoldenRod", 0xFFB8860B },
|
|
{ "DarkGray", 0xFFA9A9A9 },
|
|
{ "DarkGreen", 0xFF006400 },
|
|
{ "DarkKhaki", 0xFFBDB76B },
|
|
{ "DarkMagenta", 0xFF8B008B },
|
|
{ "DarkOliveGreen", 0xFF556B2F },
|
|
{ "Darkorange", 0xFFFF8C00 },
|
|
{ "DarkOrchid", 0xFF9932CC },
|
|
{ "DarkRed", 0xFF8B0000 },
|
|
{ "DarkSalmon", 0xFFE9967A },
|
|
{ "DarkSeaGreen", 0xFF8FBC8F },
|
|
{ "DarkSlateBlue", 0xFF483D8B },
|
|
{ "DarkSlateGray", 0xFF2F4F4F },
|
|
{ "DarkTurquoise", 0xFF00CED1 },
|
|
{ "DarkViolet", 0xFF9400D3 },
|
|
{ "DeepPink", 0xFFFF1493 },
|
|
{ "DeepSkyBlue", 0xFF00BFFF },
|
|
{ "DimGray", 0xFF696969 },
|
|
{ "DodgerBlue", 0xFF1E90FF },
|
|
{ "FireBrick", 0xFFB22222 },
|
|
{ "FloralWhite", 0xFFFFFAF0 },
|
|
{ "ForestGreen", 0xFF228B22 },
|
|
{ "Fuchsia", 0xFFFF00FF },
|
|
{ "Gainsboro", 0xFFDCDCDC },
|
|
{ "GhostWhite", 0xFFF8F8FF },
|
|
{ "Gold", 0xFFFFD700 },
|
|
{ "GoldenRod", 0xFFDAA520 },
|
|
{ "Gray", 0xFFBEBEBE },
|
|
{ "Green", 0xFF00FF00 },
|
|
{ "GreenYellow", 0xFFADFF2F },
|
|
{ "HoneyDew", 0xFFF0FFF0 },
|
|
{ "HotPink", 0xFFFF69B4 },
|
|
{ "IndianRed", 0xFFCD5C5C },
|
|
{ "Indigo", 0xFF4B0082 },
|
|
{ "Ivory", 0xFFFFFFF0 },
|
|
{ "Khaki", 0xFFF0E68C },
|
|
{ "Lavender", 0xFFE6E6FA },
|
|
{ "LavenderBlush", 0xFFFFF0F5 },
|
|
{ "LawnGreen", 0xFF7CFC00 },
|
|
{ "LemonChiffon", 0xFFFFFACD },
|
|
{ "LightBlue", 0xFFADD8E6 },
|
|
{ "LightCoral", 0xFFF08080 },
|
|
{ "LightCyan", 0xFFE0FFFF },
|
|
{ "LightGoldenRodYellow", 0xFFFAFAD2 },
|
|
{ "LightGreen", 0xFF90EE90 },
|
|
{ "LightGrey", 0xFFD3D3D3 },
|
|
{ "LightPink", 0xFFFFB6C1 },
|
|
{ "LightSalmon", 0xFFFFA07A },
|
|
{ "LightSeaGreen", 0xFF20B2AA },
|
|
{ "LightSkyBlue", 0xFF87CEFA },
|
|
{ "LightSlateGray", 0xFF778899 },
|
|
{ "LightSteelBlue", 0xFFB0C4DE },
|
|
{ "LightYellow", 0xFFFFFFE0 },
|
|
{ "Lime", 0xFF00FF00 },
|
|
{ "LimeGreen", 0xFF32CD32 },
|
|
{ "Linen", 0xFFFAF0E6 },
|
|
{ "Magenta", 0xFFFF00FF },
|
|
{ "Maroon", 0xFFB03060 },
|
|
{ "MediumAquaMarine", 0xFF66CDAA },
|
|
{ "MediumBlue", 0xFF0000CD },
|
|
{ "MediumOrchid", 0xFFBA55D3 },
|
|
{ "MediumPurple", 0xFF9370D8 },
|
|
{ "MediumSeaGreen", 0xFF3CB371 },
|
|
{ "MediumSlateBlue", 0xFF7B68EE },
|
|
{ "MediumSpringGreen", 0xFF00FA9A },
|
|
{ "MediumTurquoise", 0xFF48D1CC },
|
|
{ "MediumVioletRed", 0xFFC71585 },
|
|
{ "MidnightBlue", 0xFF191970 },
|
|
{ "MintCream", 0xFFF5FFFA },
|
|
{ "MistyRose", 0xFFFFE4E1 },
|
|
{ "Moccasin", 0xFFFFE4B5 },
|
|
{ "NavajoWhite", 0xFFFFDEAD },
|
|
{ "Navy", 0xFF000080 },
|
|
{ "None", 0x00000000 },
|
|
{ "OldLace", 0xFFFDF5E6 },
|
|
{ "Olive", 0xFF808000 },
|
|
{ "OliveDrab", 0xFF6B8E23 },
|
|
{ "Orange", 0xFFFFA500 },
|
|
{ "OrangeRed", 0xFFFF4500 },
|
|
{ "Orchid", 0xFFDA70D6 },
|
|
{ "PaleGoldenRod", 0xFFEEE8AA },
|
|
{ "PaleGreen", 0xFF98FB98 },
|
|
{ "PaleTurquoise", 0xFFAFEEEE },
|
|
{ "PaleVioletRed", 0xFFD87093 },
|
|
{ "PapayaWhip", 0xFFFFEFD5 },
|
|
{ "PeachPuff", 0xFFFFDAB9 },
|
|
{ "Peru", 0xFFCD853F },
|
|
{ "Pink", 0xFFFFC0CB },
|
|
{ "Plum", 0xFFDDA0DD },
|
|
{ "PowderBlue", 0xFFB0E0E6 },
|
|
{ "Purple", 0xFFA020F0 },
|
|
{ "Red", 0xFFFF0000 },
|
|
{ "RosyBrown", 0xFFBC8F8F },
|
|
{ "RoyalBlue", 0xFF4169E1 },
|
|
{ "SaddleBrown", 0xFF8B4513 },
|
|
{ "Salmon", 0xFFFA8072 },
|
|
{ "SandyBrown", 0xFFF4A460 },
|
|
{ "SeaGreen", 0xFF2E8B57 },
|
|
{ "SeaShell", 0xFFFFF5EE },
|
|
{ "Sienna", 0xFFA0522D },
|
|
{ "Silver", 0xFFC0C0C0 },
|
|
{ "SkyBlue", 0xFF87CEEB },
|
|
{ "SlateBlue", 0xFF6A5ACD },
|
|
{ "SlateGray", 0xFF708090 },
|
|
{ "Snow", 0xFFFFFAFA },
|
|
{ "SpringGreen", 0xFF00FF7F },
|
|
{ "SteelBlue", 0xFF4682B4 },
|
|
{ "Tan", 0xFFD2B48C },
|
|
{ "Teal", 0xFF008080 },
|
|
{ "Thistle", 0xFFD8BFD8 },
|
|
{ "Tomato", 0xFFFF6347 },
|
|
{ "Turquoise", 0xFF40E0D0 },
|
|
{ "Violet", 0xFFEE82EE },
|
|
{ "Wheat", 0xFFF5DEB3 },
|
|
{ "White", 0xFFFFFFFF },
|
|
{ "WhiteSmoke", 0xFFF5F5F5 },
|
|
{ "Yellow", 0xFFFFFF00 },
|
|
{ "YellowGreen", 0xFF9ACD32 }
|
|
};
|
|
|
|
static unsigned hex_char_to_number(uint8_t x)
|
|
{
|
|
if (x >= 'a' && x <= 'f')
|
|
x -= 'a' - 10;
|
|
else if (x >= 'A' && x <= 'F')
|
|
x -= 'A' - 10;
|
|
else if (x >= '0' && x <= '9')
|
|
x -= '0';
|
|
else
|
|
x = 0;
|
|
return x;
|
|
}
|
|
|
|
/*
|
|
* Function same as strcspn but ignores characters if they are inside a C style comments
|
|
*/
|
|
static size_t mod_strcspn(const char *string, const char *reject)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; string && string[i]; i++) {
|
|
if (string[i] == '/' && string[i+1] == '*') {
|
|
i += 2;
|
|
while ( string && string[i] && (string[i] != '*' || string[i+1] != '/') )
|
|
i++;
|
|
i++;
|
|
} else if (string[i] == '/' && string[i+1] == '/') {
|
|
i += 2;
|
|
while ( string && string[i] && string[i] != '\n' )
|
|
i++;
|
|
} else {
|
|
for (j = 0; reject && reject[j]; j++) {
|
|
if (string[i] == reject[j])
|
|
break;
|
|
}
|
|
if (reject && reject[j])
|
|
break;
|
|
}
|
|
}
|
|
return i;
|
|
}
|
|
|
|
static uint32_t color_string_to_rgba(const char *p, int len)
|
|
{
|
|
uint32_t ret = 0xFF000000;
|
|
const ColorEntry *entry;
|
|
char color_name[100];
|
|
|
|
len = FFMIN(FFMAX(len, 0), sizeof(color_name) - 1);
|
|
|
|
if (*p == '#') {
|
|
p++;
|
|
len--;
|
|
if (len == 3) {
|
|
ret |= (hex_char_to_number(p[2]) << 4) |
|
|
(hex_char_to_number(p[1]) << 12) |
|
|
(hex_char_to_number(p[0]) << 20);
|
|
} else if (len == 4) {
|
|
ret = (hex_char_to_number(p[3]) << 4) |
|
|
(hex_char_to_number(p[2]) << 12) |
|
|
(hex_char_to_number(p[1]) << 20) |
|
|
(hex_char_to_number(p[0]) << 28);
|
|
} else if (len == 6) {
|
|
ret |= hex_char_to_number(p[5]) |
|
|
(hex_char_to_number(p[4]) << 4) |
|
|
(hex_char_to_number(p[3]) << 8) |
|
|
(hex_char_to_number(p[2]) << 12) |
|
|
(hex_char_to_number(p[1]) << 16) |
|
|
(hex_char_to_number(p[0]) << 20);
|
|
} else if (len == 8) {
|
|
ret = hex_char_to_number(p[7]) |
|
|
(hex_char_to_number(p[6]) << 4) |
|
|
(hex_char_to_number(p[5]) << 8) |
|
|
(hex_char_to_number(p[4]) << 12) |
|
|
(hex_char_to_number(p[3]) << 16) |
|
|
(hex_char_to_number(p[2]) << 20) |
|
|
(hex_char_to_number(p[1]) << 24) |
|
|
(hex_char_to_number(p[0]) << 28);
|
|
}
|
|
} else {
|
|
strncpy(color_name, p, len);
|
|
color_name[len] = '\0';
|
|
|
|
entry = bsearch(color_name,
|
|
color_table,
|
|
FF_ARRAY_ELEMS(color_table),
|
|
sizeof(ColorEntry),
|
|
color_table_compare);
|
|
|
|
if (!entry)
|
|
return ret;
|
|
|
|
ret = entry->rgb_color;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int ascii2index(const uint8_t *cpixel, int cpp)
|
|
{
|
|
const uint8_t *p = cpixel;
|
|
int n = 0, m = 1, i;
|
|
|
|
for (i = 0; i < cpp; i++) {
|
|
if (*p < ' ' || *p > '~')
|
|
return AVERROR_INVALIDDATA;
|
|
n += (*p++ - ' ') * m;
|
|
m *= 95;
|
|
}
|
|
return n;
|
|
}
|
|
|
|
static int xpm_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame, AVPacket *avpkt)
|
|
{
|
|
XPMDecContext *x = avctx->priv_data;
|
|
AVFrame *p=data;
|
|
const uint8_t *end, *ptr;
|
|
int ncolors, cpp, ret, i, j;
|
|
int64_t size;
|
|
uint32_t *dst;
|
|
|
|
avctx->pix_fmt = AV_PIX_FMT_BGRA;
|
|
|
|
av_fast_padded_malloc(&x->buf, &x->buf_size, avpkt->size);
|
|
if (!x->buf)
|
|
return AVERROR(ENOMEM);
|
|
memcpy(x->buf, avpkt->data, avpkt->size);
|
|
x->buf[avpkt->size] = 0;
|
|
|
|
ptr = x->buf;
|
|
end = x->buf + avpkt->size;
|
|
while (end - ptr > 9 && memcmp(ptr, "/* XPM */", 9))
|
|
ptr++;
|
|
|
|
if (end - ptr <= 9) {
|
|
av_log(avctx, AV_LOG_ERROR, "missing signature\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
ptr += mod_strcspn(ptr, "\"");
|
|
if (sscanf(ptr, "\"%u %u %u %u\",",
|
|
&avctx->width, &avctx->height, &ncolors, &cpp) != 4) {
|
|
av_log(avctx, AV_LOG_ERROR, "missing image parameters\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if ((ret = ff_set_dimensions(avctx, avctx->width, avctx->height)) < 0)
|
|
return ret;
|
|
|
|
if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
|
|
return ret;
|
|
|
|
if (cpp <= 0 || cpp >= 5) {
|
|
av_log(avctx, AV_LOG_ERROR, "unsupported/invalid number of chars per pixel: %d\n", cpp);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
size = 1;
|
|
for (i = 0; i < cpp; i++)
|
|
size *= 95;
|
|
|
|
if (ncolors <= 0 || ncolors > size) {
|
|
av_log(avctx, AV_LOG_ERROR, "invalid number of colors: %d\n", ncolors);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
size *= 4;
|
|
|
|
av_fast_padded_malloc(&x->pixels, &x->pixels_size, size);
|
|
if (!x->pixels)
|
|
return AVERROR(ENOMEM);
|
|
|
|
ptr += mod_strcspn(ptr, ",") + 1;
|
|
if (end - ptr < 1)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
for (i = 0; i < ncolors; i++) {
|
|
const uint8_t *index;
|
|
int len;
|
|
|
|
ptr += mod_strcspn(ptr, "\"") + 1;
|
|
if (end - ptr < cpp)
|
|
return AVERROR_INVALIDDATA;
|
|
index = ptr;
|
|
ptr += cpp;
|
|
|
|
ptr = strstr(ptr, "c ");
|
|
if (ptr) {
|
|
ptr += 2;
|
|
} else {
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
len = strcspn(ptr, "\" ");
|
|
|
|
if ((ret = ascii2index(index, cpp)) < 0)
|
|
return ret;
|
|
|
|
x->pixels[ret] = color_string_to_rgba(ptr, len);
|
|
ptr += mod_strcspn(ptr, ",") + 1;
|
|
if (end - ptr < 1)
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
for (i = 0; i < avctx->height; i++) {
|
|
dst = (uint32_t *)(p->data[0] + i * p->linesize[0]);
|
|
if (end - ptr < 1)
|
|
return AVERROR_INVALIDDATA;
|
|
ptr += mod_strcspn(ptr, "\"") + 1;
|
|
if (end - ptr < 1)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
for (j = 0; j < avctx->width; j++) {
|
|
if (end - ptr < cpp)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if ((ret = ascii2index(ptr, cpp)) < 0)
|
|
return ret;
|
|
|
|
*dst++ = x->pixels[ret];
|
|
ptr += cpp;
|
|
}
|
|
ptr += mod_strcspn(ptr, ",") + 1;
|
|
}
|
|
|
|
p->key_frame = 1;
|
|
p->pict_type = AV_PICTURE_TYPE_I;
|
|
|
|
*got_frame = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
static av_cold int xpm_decode_close(AVCodecContext *avctx)
|
|
{
|
|
XPMDecContext *x = avctx->priv_data;
|
|
av_freep(&x->pixels);
|
|
|
|
av_freep(&x->buf);
|
|
x->buf_size = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_xpm_decoder = {
|
|
.name = "xpm",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_XPM,
|
|
.priv_data_size = sizeof(XPMDecContext),
|
|
.close = xpm_decode_close,
|
|
.decode = xpm_decode_frame,
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("XPM (X PixMap) image")
|
|
};
|