/* parse a SDP line and save stream attributes */
static void sdp_parse_fmtp(AVStream *st, const char *p)
{
char attr[256];
char value[4096];
int i;
RTSPStream *rtsp_st = st->priv_data;
AVCodecContext *codec = st->codec;
rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
/* loop on each attribute */
while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
{
/* grab the codec extra_data from the config parameter of the fmtp line */
sdp_parse_fmtp_config(codec, attr, value);
/* Looking for a known attribute */
for (i = 0; attr_names[i].str; ++i) {
if (!strcasecmp(attr, attr_names[i].str)) {
if (attr_names[i].type == ATTR_NAME_TYPE_INT)
*(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
*(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
}
}
}
}
static int parse_h264_sdp_line(AVFormatContext *s, int st_index,
PayloadContext *h264_data, const char *line)
{
AVStream *stream = s->streams[st_index];
AVCodecContext *codec = stream->codec;
const char *p = line;
assert(h264_data->cookie == MAGIC_COOKIE);
if (av_strstart(p, "framesize:", &p)) {
char buf1[50];
char *dst = buf1;
// remove the protocol identifier..
while (*p && *p == ' ') p++; // strip spaces.
while (*p && *p != ' ') p++; // eat protocol identifier
while (*p && *p == ' ') p++; // strip trailing spaces.
while (*p && *p != '-' && (buf1 - dst) < sizeof(buf1) - 1) {
*dst++ = *p++;
}
*dst = '\0';
// a='framesize:96 320-240'
// set our parameters..
codec->width = atoi(buf1);
codec->height = atoi(p + 1); // skip the -
codec->pix_fmt = PIX_FMT_YUV420P;
} else if (av_strstart(p, "fmtp:", &p)) {
char attr[256];
char value[4096];
// remove the protocol identifier..
while (*p && *p == ' ') p++; // strip spaces.
while (*p && *p != ' ') p++; // eat protocol identifier
while (*p && *p == ' ') p++; // strip trailing spaces.
/* loop on each attribute */
while (rtsp_next_attr_and_value
(&p, attr, sizeof(attr), value, sizeof(value))) {
/* grab the codec extra_data from the config parameter of the fmtp line */
sdp_parse_fmtp_config_h264(stream, h264_data, attr, value);
}
} else if (av_strstart(p, "cliprect:", &p)) {
// could use this if we wanted.
}
av_set_pts_info(stream, 33, 1, 90000); // 33 should be right, because the pts is 64 bit? (done elsewhere; this is a one time thing)
return 0; // keep processing it the normal way...
}
