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rtmp: add functions for reading AMF values

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Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Jordi Ortiz
2012-08-01 11:25:19 +02:00
committed by Luca Barbato
parent cfb1091898
commit 50468f93e3
2 changed files with 87 additions and 0 deletions
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45
libavformat/rtmppkt.c
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@ -71,6 +71,51 @@ void ff_amf_write_object_end(uint8_t **dst)
bytestream_put_be24(dst, AMF_DATA_TYPE_OBJECT_END);
}
int ff_amf_read_bool(GetByteContext *bc, int *val)
{
if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_BOOL)
return AVERROR_INVALIDDATA;
*val = bytestream2_get_byte(bc);
return 0;
}
int ff_amf_read_number(GetByteContext *bc, double *val)
{
uint64_t read;
if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NUMBER)
return AVERROR_INVALIDDATA;
read = bytestream2_get_be64(bc);
*val = av_int2double(read);
return 0;
}
int ff_amf_read_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);
readsize = bytestream2_get_buffer(bc, str, stringlen);
if (readsize != stringlen) {
av_log(NULL, AV_LOG_WARNING,
"Unable to read as many bytes as AMF string signaled\n");
}
str[readsize] = '\0';
*length = FFMIN(stringlen, readsize);
return 0;
}
int ff_amf_read_null(GetByteContext *bc)
{
if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NULL)
return AVERROR_INVALIDDATA;
return 0;
}
int ff_rtmp_packet_read(URLContext *h, RTMPPacket *p,
int chunk_size, RTMPPacket *prev_pkt)
{