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Code Issues Releases Activity

lavf: make a variant of ff_get_str16_nolen public

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It will be useful in mp3 demuxer and hopeful some other places.

Signed-off-by: Janne Grunau <janne-ffmpeg@jannau.net>
(cherry picked from commit 93b78d1210)
This commit is contained in:
Anton Khirnov 2011-01-23 12:38:27 +01:00 committed by Michael Niedermayer
parent 744c166422
commit f9d6b13a23
3 changed files with 41 additions and 20 deletions
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30
libavformat/asfdec.c
View File

@ -121,21 +121,6 @@ static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
}
#endif
static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
{
char* q = buf;
while (len > 1) {
uint8_t tmp;
uint32_t ch;
GET_UTF16(ch, (len -= 2) >= 0 ? get_le16(pb) : 0, break;)
PUT_UTF8(ch, tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
}
if (len > 0)
url_fskip(pb, len);
*q = '\0';
}
static int asf_probe(AVProbeData *pd)
{
/* check file header */
@ -167,7 +152,7 @@ static void get_tag(AVFormatContext *s, const char *key, int type, int len)
return;
if (type == 0) { // UTF16-LE
get_str16_nolen(s->pb, len, value, 2*len + 1);
avio_get_str16le(s->pb, len, value, 2*len + 1);
} else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
uint64_t num = get_value(s->pb, type);
snprintf(value, len, "%"PRIu64, num);
@ -206,6 +191,7 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
for(;;) {
uint64_t gpos= url_ftell(pb);
int ret;
ff_get_guid(pb, &g);
gsize = get_le64(pb);
dprintf(s, "%08"PRIx64": ", gpos);
@ -447,7 +433,8 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
for(j = 0; j < stream_count; j++) {
char lang[6];
unsigned int lang_len = get_byte(pb);
get_str16_nolen(pb, lang_len, lang, sizeof(lang));
if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len)
url_fskip(pb, lang_len - ret);
if (j < 128)
av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
}
@ -462,7 +449,8 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
name_len = get_le16(pb);
if (name_len%2) // must be even, broken lavf versions wrote len-1
name_len += 1;
get_str16_nolen(pb, name_len, name, sizeof(name));
if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
url_fskip(pb, name_len - ret);
value_type = get_le16(pb);
value_len = get_le16(pb);
if (!value_type && value_len%2)
@ -491,7 +479,8 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
value_type= get_le16(pb);
value_len= get_le32(pb);
get_str16_nolen(pb, name_len, name, sizeof(name));
if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
url_fskip(pb, name_len - ret);
//av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
url_fskip(pb, value_len - 2);
@ -574,7 +563,8 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
get_le32(pb); // send time
get_le32(pb); // flags
name_len = get_le32(pb); // name length
get_str16_nolen(pb, name_len * 2, name, sizeof(name));
if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len)
url_fskip(pb, name_len - ret);
ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
}
#if 0

9
libavformat/avio.h
View File

@ -460,6 +460,15 @@ unsigned int get_le32(ByteIOContext *s);
uint64_t get_le64(ByteIOContext *s);
unsigned int get_le16(ByteIOContext *s);
/**
* Read a UTF-16 string from pb and convert it to UTF-8.
* The reading will terminate when either a null or invalid character was
* encountered or maxlen bytes have been read.
* @return number of bytes read (is always <= maxlen)
*/
int avio_get_str16le(ByteIOContext *pb, int maxlen, char *buf, int buflen);
int avio_get_str16be(ByteIOContext *pb, int maxlen, char *buf, int buflen);
char *get_strz(ByteIOContext *s, char *buf, int maxlen);
unsigned int get_be16(ByteIOContext *s);
unsigned int get_be24(ByteIOContext *s);

22
libavformat/aviobuf.c
View File

@ -602,6 +602,28 @@ int ff_get_line(ByteIOContext *s, char *buf, int maxlen)
return i;
}
#define GET_STR16(type, read) \
int avio_get_str16 ##type(ByteIOContext *pb, int maxlen, char *buf, int buflen)\
{\
char* q = buf;\
int ret = 0;\
while (ret + 1 < maxlen) {\
uint8_t tmp;\
uint32_t ch;\
GET_UTF16(ch, (ret += 2) <= maxlen ? read(pb) : 0, break;)\
if (!ch)\
break;\
PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;)\
}\
*q = 0;\
return ret;\
}\
GET_STR16(le, get_le16)
GET_STR16(be, get_be16)
#undef GET_STR16
uint64_t get_be64(ByteIOContext *s)
{
uint64_t val;