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rtp.c @ 2

Last change on this file since 2 was 2, checked in by jglee, 11 years ago
first commit
Property svn:executable set to ``*
File size: 10.4 KB

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1	/***************************************************************************
2	* Copyright (c) 2012, Broadcom Corporation
3	* All Rights Reserved
4	* Confidential Property of Broadcom Corporation
5	*
6	* THIS SOFTWARE MAY ONLY BE USED SUBJECT TO AN EXECUTED SOFTWARE LICENSE
7	* AGREEMENT BETWEEN THE USER AND BROADCOM. YOU HAVE NO RIGHT TO USE OR
8	* EXPLOIT THIS MATERIAL EXCEPT SUBJECT TO THE TERMS OF SUCH AN AGREEMENT.
9	*
10	* $brcm_Workfile: $
11	* $brcm_Revision: $
12	* $brcm_Date: $
13	*
14	* Module Description:
15	*
16	* Revision History:
17	*
18	* $brcm_Log: $
19	*
20	***************************************************************************/
21	#if defined(NEXUS_LINUXUSER)
22	#include <stdlib.h>
23	#include <string.h>
24	#include <netinet/in.h>
25	#include <unistd.h>
26	#include <stdlib.h>
27	#include <stdio.h>
28	#include <sys/types.h>
29	#include <sys/socket.h>
30	#include <arpa/inet.h>
31	#elif defined(CONFIG_LWIP)
32	#include "lwip/ip4.h"
33	#endif
34	/* MPEG-2 TS RTP stack */
35
36	#include "rtp.h"
37
38	#ifdef BRCM_DBG
39	#define RTP_DBGMSG(x) { printf("%s:%d-",__FUNCTION__,__LINE__); printf x ; }
40	#else
41	#define RTP_DBGMSG(x) ((void)0)
42	#endif
43
44
45	#if defined(NEXUS_LINUXUSER)
46	#define RTP_SOCKET(a,b,c) socket(a,b,c)
47	#define RTP_SETSOCKOPT(a,b,c,d,e) setsockopt(a,b,c,d,e)
48	#define RTP_SENDTO(a,b,c,d,e,f) sendto(a,b,c,d,e,f)
49	#define RTP_RECV(a,b,c,d) recv(a,b,c,d)
50	#elif defined(CONFIG_LWIP)
51	#define RTP_SOCKET(a,b,c) lwip_socket(a,b,c)
52	#define RTP_SETSOCKOPT(a,b,c,d,e) lwip_setsockopt(a,b,c,d,e)
53	#define RTP_SENDTO(a,b,c,d,e,f) lwip_sendto(a,b,c,d,e,f)
54	#define RTP_RECV(a,b,c,d) lwip_recv(a,b,c,d)
55	#else
56	#define RTP_SOCKET(a,b,c) 0
57	#define RTP_SETSOCKOP(a,b,c,d,e) 0
58	#define RTP_SENDTO(a,b,c,d,e,f) 0
59	#define RTP_RECV(a,b,c,d) 0
60	#endif
61
62	/* Payload types (from RFC 1890):
63
64	PT encoding audio/video clock rate channels
65	name (A/V) (Hz) (audio)
66	_______________________________________________________________
67	0 PCMU A 8000 1
68	1 1016 A 8000 1
69	2 G721 A 8000 1
70	3 GSM A 8000 1
71	4 unassigned A 8000 1
72	5 DVI4 A 8000 1
73	6 DVI4 A 16000 1
74	7 LPC A 8000 1
75	8 PCMA A 8000 1
76	9 G722 A 8000 1
77	10 L16 A 44100 2
78	11 L16 A 44100 1
79	12 unassigned A
80	13 unassigned A
81	14 MPA A 90000 (see text)
82	15 G728 A 8000 1
83	16--23 unassigned A
84	24 unassigned V
85	25 CelB V 90000
86	26 JPEG V 90000
87	27 unassigned V
88	28 nv V 90000
89	29 unassigned V
90	30 unassigned V
91	31 H261 V 90000
92	32 MPV V 90000
93	33 MP2T AV 90000
94	34--71 unassigned ?
95	72--76 reserved N/A N/A N/A
96	77--95 unassigned ?
97	96--127 dynamic ?
98
99	*/
100	/******************************************************************************
101	* INPUTS: p_rtp - uninitialized RTP structure
102	* buf_len - length to allocate for buffer in bytes
103	* payload_type - RTP payload type
104	* OUTPUTS: None.
105	* RETURNS: Non-zero on failure.
106	* FUNCTION: Initialize rtp structure and header for payload type.
107	******************************************************************************/
108
109	int init_rtp(
110	rtp_t p_rtp, / uninitialized RTP structure */
111	unsigned int buf_len, /* buffer length in bytes */
112	int payload_type /* payload type of default RTP header (to use for sending) */
113	)
114	{
115	p_rtp->s_fd = -1;
116	p_rtp->rtph.b.v = 2;
117	p_rtp->rtph.b.p = 0;
118	p_rtp->rtph.b.x = 0;
119	p_rtp->rtph.b.cc = 0;
120	p_rtp->rtph.b.m = 0;
121	p_rtp->rtph.b.pt = payload_type;
122	p_rtp->rtph.b.seq = rand() & 65535;
123	p_rtp->rtph.timestamp = rand();
124	p_rtp->buf_len = buf_len;
125	p_rtp->h_len = 12 + (4 * p_rtp->rtph.b.cc);
126	p_rtp->buf = malloc(p_rtp->h_len);
127
128	if (p_rtp->buf == NULL)
129	{
130	return RTP_MEM_ERR;
131	}
132	p_rtp->data_buf = &p_rtp->buf[p_rtp->h_len];
133
134	return RTP_OK;
135	}
136
137	/******************************************************************************
138	* INPUTS: p_rtp - initialized RTP structure
139	* OUTPUTS: None.
140	* RETURNS: None.
141	* FUNCTION: Release rtp structure resources.
142	******************************************************************************/
143
144	void free_rtp(
145	rtp_t p_rtp / initialized RTP structure */
146	)
147	{
148	if (p_rtp->buf)
149	{
150	free(p_rtp->buf);
151	}
152	}
153
154	/******************************************************************************
155	* INPUTS: p_rtp - initialized RTP structure
156	* OUTPUTS: len - number of payload bytes.
157	* RETURNS: non-zero on error.
158	* FUNCTION: receive RTP packet on client socket.
159	******************************************************************************/
160	#if 0
161	static void DBG_HEXDUMP(unsigned char* ptr, unsigned long len)
162	{
163	unsigned long i;
164
165	for (i=0; i<len; i++ )
166	{
167	if( i % 16 == 0 )
168	printf ("\n%03lx: ", (unsigned long) i);
169	printf ("%02x ", ptr[i]);
170	}
171	printf("\n\n");
172	}
173	#else
174	#define DBG_HEXDUMP(ptr, len)
175	#endif
176
177	int get_rtp(
178	rtp_t p_rtp, / initialized RTP structure */
179	unsigned int len / number of payload bytes */
180	)
181	{
182	*len = RTP_RECV(p_rtp->s_fd,p_rtp->buf,p_rtp->buf_len,0);
183
184	if (*len <= 12)
185	{
186	RTP_DBGMSG(("recv packet length = %d, errno = %d\n",*len,errno));
187	return RTP_RECV_ERR;
188	}
189
190	memcpy(&p_rtp->rtph,p_rtp->buf,sizeof(rtp_header_t));
191
192	p_rtp->rtph.b.seq = ((p_rtp->rtph.b.seq & 0xFF) << 8) \| ((p_rtp->rtph.b.seq >> 8) & 0xFF) ;
193	p_rtp->rtph.timestamp = ((p_rtp->rtph.timestamp & 0xFF) << 24) \|
194	((p_rtp->rtph.timestamp & 0xFF00) << 8) \|
195	((p_rtp->rtph.timestamp & 0xFF0000) >> 8) \|
196	((p_rtp->rtph.timestamp & 0xFF000000) >> 24);
197
198	p_rtp->h_len = 12 ; // Not working + (4 * p_rtp->rtph.b.cc);
199	p_rtp->data_buf = &(p_rtp->buf[p_rtp->h_len]);
200	*len -= p_rtp->h_len;
201	return RTP_OK;
202	}
203
204	/******************************************************************************
205	* INPUTS: p_rtp - initialized RTP structure
206	* len - number of bytes in payload
207	* OUTPUTS: None.
208	* RETURNS: non-zero on error.
209	* FUNCTION: sent RTP packet on server socket. Assumes data is loaded at
210	* data_buf which is offset h_len from the beginning of buf so
211	* if the cc field is changed make sure h_len is recalculated and
212	* data_buf is set to the proper offset.
213	******************************************************************************/
214
215	int send_rtp(
216	rtp_t p_rtp, / initialized RTP structure */
217	unsigned char *buf,
218	unsigned int len /* number of bytes in payload */
219	)
220	{
221	rtp_header_t *p_rh = buf;
222	memcpy(p_rh,&p_rtp->rtph,p_rtp->h_len);
223	p_rh->b.seq = ((p_rh->b.seq & 0xFF) << 8) \| ((p_rh->b.seq >> 8) & 0xFF) ;
224	p_rh->timestamp = ((p_rh->timestamp & 0xFF) << 24) \|
225	((p_rh->timestamp & 0xFF00) << 8) \|
226	((p_rh->timestamp & 0xFF0000) >> 8) \|
227	((p_rh->timestamp & 0xFF000000) >> 24);
228
229	p_rtp->rtph.b.seq++;
230	return RTP_SENDTO(p_rtp->s_fd, buf, len + p_rtp->h_len,
231	0,(struct sockaddr *)&(p_rtp->saddr),sizeof(p_rtp->saddr));
232	}
233
234	/******************************************************************************
235	* INPUTS: p_rtp - initialized RTP structure
236	* addr_str - ip address in string format
237	* port - ip port
238	* ttl - time to live setting.
239	* OUTPUTS: None.
240	* RETURNS: non-zero on error.
241	* FUNCTION: Open a socket and configure for sending RTP packets.
242	******************************************************************************/
243
244	int makesocket_rtp(
245	rtp_t p_rtp, / initialized RTP structure */
246	char addr_str, / address string */
247	unsigned short port, /* create socket for port */
248	int ttl /* TTL */
249	)
250	{
251	int val = 1;
252	char c_val = (char)ttl;
253	p_rtp->s_fd = RTP_SOCKET( AF_INET, SOCK_DGRAM, 0 );
254
255	if (p_rtp->s_fd < 0)
256	{
257	RTP_DBGMSG(("socket create failed errno = %d\n",errno));
258	return RTP_SOCKET_ERR;
259	}
260	#if defined(CONFIG_LWIP)
261	p_rtp->saddr.sin_len = sizeof(p_rtp->saddr);
262	#endif
263	p_rtp->saddr.sin_family = AF_INET;
264	p_rtp->saddr.sin_port = htons(port);
265	p_rtp->saddr.sin_addr.s_addr = inet_addr(addr_str);
266
267	if (RTP_SETSOCKOPT(p_rtp->s_fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(int)) < 0)
268	{
269	RTP_DBGMSG(("setsockopt SO_REUSEADDR failed errno = %d\n",errno));
270	return RTP_SOCKET_ERR;
271	}
272	#ifdef NEXUS_LINUXUSER
273	if (RTP_SETSOCKOPT(p_rtp->s_fd, IPPROTO_IP, IP_MULTICAST_TTL, &c_val, sizeof(char)) < 0)
274	{
275	RTP_DBGMSG(("setsockopt IP_MULTICAST_TTL failed errno = %d\n",errno));
276	return RTP_SOCKET_ERR;
277	}
278
279	c_val = 1;
280	if (RTP_SETSOCKOPT(p_rtp->s_fd, IPPROTO_IP, IP_MULTICAST_LOOP, &c_val, sizeof(char)) < 0)
281	{
282	RTP_DBGMSG(("setsockopt IP_MULTICAST_LOOP failed errno = %d\n",errno));
283	return RTP_SOCKET_ERR;
284	}
285	#endif
286	return RTP_OK;
287	}
288
289	/******************************************************************************
290	* INPUTS: p_rtp - initialized RTP structure
291	* addr_str - ip address in string format
292	* port - ip port
293	* ttl - time to live setting.
294	* OUTPUTS: None.
295	* RETURNS: non-zero on error.
296	* FUNCTION: Open a socket and configure for sending RTP packets.
297	******************************************************************************/
298
299	int makeclientsocket_rtp(
300	rtp_t p_rtp, / initialized RTP structure */
301	char addr_str, / address string */
302	unsigned short port, /* create socket for port */
303	int ttl /* TTL */
304	)
305	{
306	#ifdef NEXUS_LINUXUSER
307	struct ip_mreq mreq;
308	struct sockaddr_in sin;
309
310	if (makesocket_rtp(p_rtp,addr_str,port,ttl) != RTP_OK)
311	{
312	RTP_DBGMSG(("makesocket_rtp failed\n"));
313	return RTP_SOCKET_ERR;
314	}
315
316	sin.sin_family = AF_INET;
317	sin.sin_port = htons(port);
318	sin.sin_addr.s_addr = inet_addr(addr_str);
319
320	if (bind(p_rtp->s_fd,(struct sockaddr *)&sin,sizeof(sin)))
321	{
322	RTP_DBGMSG(("bind failed errno = %d\n",errno));
323	return RTP_SOCKET_ERR;
324	}
325
326	if ((ntohl(sin.sin_addr.s_addr) >> 28) == 0xe)
327	{
328	mreq.imr_multiaddr.s_addr = sin.sin_addr.s_addr;
329	mreq.imr_interface.s_addr = 0;
330	if (setsockopt(p_rtp->s_fd,IPPROTO_IP,IP_ADD_MEMBERSHIP,&mreq,sizeof(mreq)))
331	{
332	RTP_DBGMSG(("setsockopt IP_ADD_MEMBERSHIP failed errno = %d\n",errno));
333	return RTP_SOCKET_ERR;
334	}
335	}
336	#endif
337	return RTP_OK;
338	}

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source: svn/trunk/newcon3bcm2_21bu/dta/src/nexus/rtp.c @ 2

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