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rtmppkt: Add method to read an AMF string that is not prefixed by its type 

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Uwe L. Korn 2014-05-31 20:37:25 +01:00 committed by Martin Storsjö
parent a1859032e3
commit 3b18857ab3
2 changed files with 27 additions and 4 deletions
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12
libavformat/rtmppkt.c
View File

@ -102,13 +102,11 @@ int ff_amf_read_number(GetByteContext *bc, double *val)
return 0;
}
int ff_amf_read_string(GetByteContext *bc, uint8_t *str,
int ff_amf_get_string(GetByteContext *bc, uint8_t *str,
int strsize, int *length)
{
int stringlen = 0;
int readsize;
if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_STRING)
return AVERROR_INVALIDDATA;
stringlen = bytestream2_get_be16(bc);
if (stringlen + 1 > strsize)
return AVERROR(EINVAL);
@ -122,6 +120,14 @@ int ff_amf_read_string(GetByteContext *bc, uint8_t *str,
return 0;
}
int ff_amf_read_string(GetByteContext *bc, uint8_t *str,
int strsize, int *length)
{
if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_STRING)
return AVERROR_INVALIDDATA;
return ff_amf_get_string(bc, str, strsize, length);
}
int ff_amf_read_null(GetByteContext *bc)
{
if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NULL)

17
libavformat/rtmppkt.h
View File

@ -277,6 +277,23 @@ int ff_amf_read_bool(GetByteContext *gbc, int *val);
*/
int ff_amf_read_number(GetByteContext *gbc, double *val);
/**
* Get AMF string value.
*
* This function behaves the same as ff_amf_read_string except that
* it does not expect the AMF type prepended to the actual data.
* Appends a trailing null byte to output string in order to
* ease later parsing.
*
*@param[in,out] gbc GetByteContext initialized with AMF-formatted data
*@param[out] str read string
*@param[in] strsize buffer size available to store the read string
*@param[out] length read string length
*@return 0 on success or an AVERROR code on failure
*/
int ff_amf_get_string(GetByteContext *bc, uint8_t *str,
int strsize, int *length);
/**
* Read AMF string value.
*