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Fixes to version sei message.

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- Fixed the last 16 characters of the url string being cut of.
- Added some guards against the message overwriting the stack.
This commit is contained in:
Ari Koivula 2014-02-07 11:43:38 +02:00
parent 3e96df2a81
commit b48d1c9ca2
1 changed files with 15 additions and 8 deletions
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21
src/encoder.c
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@ -597,12 +597,14 @@ void encode_access_unit_delimiter(encoder_control* encoder)
void encode_prefix_sei_version(encoder_control* encoder)
{
#define STR_BUF_LEN 1000
int i, length;
char buf[1000] = { 0 };
char *s = buf;
char buf[STR_BUF_LEN] = { 0 };
char *s = buf + 16;
config *cfg = encoder->cfg;
// uuid_iso_iec_11578
// random uuid_iso_iec_11578 generated with www.famkruithof.net/uuid/uuidgen
static const uint8_t uuid[16] = {
0x32, 0xfe, 0x46, 0x6c, 0x98, 0x41, 0x42, 0x69,
0xae, 0x35, 0x6a, 0x91, 0x54, 0x9e, 0xf3, 0xf1
@ -610,9 +612,8 @@ void encode_prefix_sei_version(encoder_control* encoder)
memcpy(buf, uuid, 16);
// user_data_payload_byte
s += sprintf(s + 16, "Kvazaar HEVC Encoder v. " VERSION_STRING " - "
"Copyleft 2012-2014 - http://ultravideo.cs.tut.fi/ - options:");
s += sprintf(s, "Kvazaar HEVC Encoder v. " VERSION_STRING " - "
"Copyleft 2012-2014 - http://ultravideo.cs.tut.fi/ - options:");
s += sprintf(s, " %dx%d", cfg->width, cfg->height);
s += sprintf(s, " deblock=%d:%d:%d", cfg->deblock_enable,
cfg->deblock_beta, cfg->deblock_tc);
@ -620,7 +621,11 @@ void encode_prefix_sei_version(encoder_control* encoder)
s += sprintf(s, " intra_period=%d", cfg->intra_period);
s += sprintf(s, " qp=%d", cfg->qp);
length = strlen(buf) + 1;
length = (int)(s - buf + 1); // length, +1 for \0
// Assert this so that in the future if the message gets longer, we remember
// to increase the buf len. Divide by 2 for margin.
assert(length < STR_BUF_LEN / 2);
// payloadType = 5 -> user_data_unregistered
WRITE_U(encoder->stream, 5, 8, "last_payload_type_byte");
@ -632,6 +637,8 @@ void encode_prefix_sei_version(encoder_control* encoder)
for (i = 0; i < length; i++)
WRITE_U(encoder->stream, ((uint8_t *)buf)[i], 8, "sei_payload");
#undef STR_BUF_LEN
}
void encode_pic_parameter_set(encoder_control* encoder)