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lavc/srtdec: make some sscanf to work at the end of a line.

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Fix sscanf calls that can't work at the end of a line unless it ends
with \r\n or \n: the markup line may/should/must not end with these
characters.
This commit is contained in:
Clément Bœsch 2012-12-29 23:50:08 +01:00
parent c36302a7a4
commit d927d8395d
1 changed files with 7 additions and 5 deletions
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12
libavcodec/srtdec.c
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@ -50,7 +50,7 @@ typedef struct {
static const char *srt_to_ass(AVCodecContext *avctx, char *out, char *out_end,
const char *in, int x1, int y1, int x2, int y2)
{
char c, *param, buffer[128], tmp[128];
char *param, buffer[128], tmp[128];
int len, tag_close, sptr = 1, line_start = 1, an = 0, end = 0;
SrtStack stack[16];
@ -89,16 +89,18 @@ static const char *srt_to_ass(AVCodecContext *avctx, char *out, char *out_end,
break;
case '{': /* skip all {\xxx} substrings except for {\an%d}
and all microdvd like styles such as {Y:xxx} */
an += sscanf(in, "{\\an%*1u}%c", &c) == 1;
if ((an != 1 && sscanf(in, "{\\%*[^}]}%n%c", &len, &c) > 0) ||
sscanf(in, "{%*1[CcFfoPSsYy]:%*[^}]}%n%c", &len, &c) > 0) {
len = 0;
an += sscanf(in, "{\\an%*1u}%n", &len) >= 0 && len > 0;
if ((an != 1 && (len = 0, sscanf(in, "{\\%*[^}]}%n", &len) >= 0 && len > 0)) ||
(len = 0, sscanf(in, "{%*1[CcFfoPSsYy]:%*[^}]}%n", &len) >= 0 && len > 0)) {
in += len - 1;
} else
*out++ = *in;
break;
case '<':
tag_close = in[1] == '/';
if (sscanf(in+tag_close+1, "%127[^>]>%n%c", buffer, &len,&c) >= 2) {
len = 0;
if (sscanf(in+tag_close+1, "%127[^>]>%n", buffer, &len) >= 1 && len > 0) {
if ((param = strchr(buffer, ' ')))
*param++ = 0;
if ((!tag_close && sptr < FF_ARRAY_ELEMS(stack)) ||