int ff_parse_fmtp(AVStream *stream, PayloadContext *data, const char *p,
int (*parse_fmtp)(AVStream *stream,
PayloadContext *data,
char *attr, char *value))
{
char attr[256];
char *value;
int res;
int value_size = strlen(p) + 1;
if (!(value = av_malloc(value_size))) {
av_log(stream, AV_LOG_ERROR, "Failed to allocate data for FMTP.");
return AVERROR(ENOMEM);
}
// remove protocol identifier
while (*p && *p == ' ') p++; // strip spaces
while (*p && *p != ' ') p++; // eat protocol identifier
while (*p && *p == ' ') p++; // strip trailing spaces
while (ff_rtsp_next_attr_and_value(&p,
attr, sizeof(attr),
value, value_size)) {
res = parse_fmtp(stream, data, attr, value);
if (res < 0 && res != AVERROR_PATCHWELCOME) {
av_free(value);
return res;
}
}
av_free(value);
return 0;
}
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 != '-' && (dst - buf1) < 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 (ff_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...
}
