79 int ident, fragmented, tdt, num_pkts, pkt_len;
111 fragmented = buf[3] >> 6;
112 tdt = (buf[3] >> 4) & 3;
113 num_pkts = buf[3] & 0xf;
116 if (pkt_len > len - 6) {
118 "Invalid packet length %d in %d byte packet\n", pkt_len,
123 if (ident != data->
ident) {
125 "Unimplemented Xiph SDP configuration change detected\n");
131 "Unimplemented RTP Xiph packet settings (%d,%d,%d)\n",
132 fragmented, tdt, num_pkts);
139 if (fragmented == 0) {
145 memcpy(pkt->
data, buf, pkt_len);
170 }
else if (fragmented == 1) {
184 assert(fragmented < 4);
194 "Received packet without a start fragment; dropping.\n");
201 if (fragmented == 3) {
206 "Error occurred when getting fragment buffer.");
223 for (; *buf < buf_end; ++*buf) {
226 if (!(**buf & 0x80)) {
239 const uint8_t * packed_headers_end,
243 unsigned num_packed, num_headers, length, length1, length2, extradata_alloc;
246 if (packed_headers_end - packed_headers < 9) {
248 "Invalid %td byte packed header.",
249 packed_headers_end - packed_headers);
253 num_packed = bytestream_get_be32(&packed_headers);
254 xiph_data->
ident = bytestream_get_be24(&packed_headers);
255 length = bytestream_get_be16(&packed_headers);
256 num_headers =
get_base128(&packed_headers, packed_headers_end);
257 length1 =
get_base128(&packed_headers, packed_headers_end);
258 length2 =
get_base128(&packed_headers, packed_headers_end);
260 if (num_packed != 1 || num_headers > 3) {
262 "Unimplemented number of headers: %d packed headers, %d headers\n",
263 num_packed, num_headers);
267 if (packed_headers_end - packed_headers != length ||
268 length1 > length || length2 > length - length1) {
270 "Bad packed header lengths (%d,%d,%td,%d)\n", length1,
271 length2, packed_headers_end - packed_headers, length);
289 memcpy(ptr, packed_headers, length);
300 char *attr,
char *value)
305 if (!strcmp(attr,
"sampling")) {
306 if (!strcmp(value,
"YCbCr-4:2:0")) {
308 }
else if (!strcmp(value,
"YCbCr-4:4:2")) {
310 }
else if (!strcmp(value,
"YCbCr-4:4:4")) {
314 "Unsupported pixel format %s\n", attr);
317 }
else if (!strcmp(attr,
"width")) {
320 codec->
width = atoi(value);
322 }
else if (!strcmp(attr,
"height")) {
325 codec->
height = atoi(value);
327 }
else if (!strcmp(attr,
"delivery-method")) {
330 }
else if (!strcmp(attr,
"configuration-uri")) {
335 }
else if (!strcmp(attr,
"configuration")) {
340 size_t decoded_alloc = strlen(value) / 4 * 3 + 4;
342 if (decoded_alloc <= INT_MAX) {
343 decoded_packet =
av_malloc(decoded_alloc);
344 if (decoded_packet) {
349 (decoded_packet, decoded_packet + packet_size, codec,
353 "Out of memory while decoding SDP configuration.\n");