/* send RTSP OPTIONS request */
static void rtsp_options(CURL *curl, const char *uri)
{
CURLcode res = CURLE_OK;
printf("\nRTSP: OPTIONS %s\n", uri);
my_curl_easy_setopt(curl, CURLOPT_RTSP_STREAM_URI, uri);
my_curl_easy_setopt(curl, CURLOPT_RTSP_REQUEST, (long)CURL_RTSPREQ_OPTIONS);
my_curl_easy_perform(curl);
}
/* send RTSP PLAY request */
static void rtsp_play(CURL *curl, const char *uri, const char *range)
{
CURLcode res = CURLE_OK;
printf("\nRTSP: PLAY %s\n", uri);
my_curl_easy_setopt(curl, CURLOPT_RTSP_STREAM_URI, uri);
my_curl_easy_setopt(curl, CURLOPT_RANGE, range);
my_curl_easy_setopt(curl, CURLOPT_RTSP_REQUEST, (long)CURL_RTSPREQ_PLAY);
my_curl_easy_perform(curl);
}
/* send RTSP SETUP request */
static void rtsp_setup(CURL *curl, const char *uri, const char *transport)
{
CURLcode res = CURLE_OK;
printf("\nRTSP: SETUP %s\n", uri);
printf(" TRANSPORT %s\n", transport);
my_curl_easy_setopt(curl, CURLOPT_RTSP_STREAM_URI, uri);
my_curl_easy_setopt(curl, CURLOPT_RTSP_TRANSPORT, transport);
my_curl_easy_setopt(curl, CURLOPT_RTSP_REQUEST, (long)CURL_RTSPREQ_SETUP);
my_curl_easy_perform(curl);
}
/* send RTSP TEARDOWN request */
static void rtsp_teardown(CURL *curl, const char *uri)
{
CURLcode res = CURLE_OK;
printf("\nRTSP: TEARDOWN %s\n", uri);
my_curl_easy_setopt(curl, CURLOPT_RTSP_REQUEST, (long)CURL_RTSPREQ_TEARDOWN);
my_curl_easy_perform(curl);
}
/* send RTSP DESCRIBE request and write sdp response to a file */
static void rtsp_describe(CURL *curl, const char *uri,
const char *sdp_filename)
{
CURLcode res = CURLE_OK;
FILE *sdp_fp = fopen(sdp_filename, "wb");
printf("\nRTSP: DESCRIBE %s\n", uri);
if(sdp_fp == NULL) {
fprintf(stderr, "Could not open '%s' for writing\n", sdp_filename);
sdp_fp = stdout;
}
else {
printf("Writing SDP to '%s'\n", sdp_filename);
}
my_curl_easy_setopt(curl, CURLOPT_WRITEDATA, sdp_fp);
my_curl_easy_setopt(curl, CURLOPT_RTSP_REQUEST, (long)CURL_RTSPREQ_DESCRIBE);
my_curl_easy_perform(curl);
my_curl_easy_setopt(curl, CURLOPT_WRITEDATA, stdout);
if(sdp_fp != stdout) {
fclose(sdp_fp);
}
}
/* main app */
int main(int argc, char *const argv[])
{
#if 1
const char *transport = "RTP/AVP;unicast;client_port=1234-1235"; /* UDP */
#else
const char *transport = "RTP/AVP/TCP;unicast;client_port=1234-1235"; /* TCP */
#endif
const char *range = "0.000-";
int rc = EXIT_SUCCESS;
char *base_name = NULL;
printf("\nRTSP request %s\n", VERSION_STR);
printf(" Project web site: http://code.google.com/p/rtsprequest/\n");
printf(" Requires cURL V7.20 or greater\n\n");
/* check command line */
if ((argc != 2) && (argc != 3)) {
base_name = strrchr(argv[0], '/');
if (base_name == NULL) {
base_name = strrchr(argv[0], '\\');
}
if (base_name == NULL) {
base_name = argv[0];
} else {
base_name++;
}
printf("Usage: %s url [transport]\n", base_name);
printf(" url of video server\n");
printf
(" transport (optional) specifier for media stream protocol\n");
printf(" default transport: %s\n", transport);
printf("Example: %s rtsp://192.168.0.2/media/video1\n\n",
base_name);
rc = EXIT_FAILURE;
} else {
const char *url = argv[1];
char *uri = malloc(strlen(url) + 32);
char *sdp_filename = malloc(strlen(url) + 32);
char *control = malloc(strlen(url) + 32);
CURLcode res;
get_sdp_filename(url, sdp_filename);
if (argc == 3) {
transport = argv[2];
}
/* initialize curl */
res = curl_global_init(CURL_GLOBAL_ALL);
if (res == CURLE_OK) {
curl_version_info_data *data =
curl_version_info(CURLVERSION_NOW);
CURL *curl;
fprintf(stderr, " cURL V%s loaded\n", data->version);
/* initialize this curl session */
curl = curl_easy_init();
if (curl != NULL) {
my_curl_easy_setopt(curl, CURLOPT_VERBOSE, 0L);
my_curl_easy_setopt(curl, CURLOPT_NOPROGRESS,
1L);
my_curl_easy_setopt(curl, CURLOPT_HEADERDATA,
stdout);
my_curl_easy_setopt(curl, CURLOPT_URL, url);
/* request server options */
sprintf(uri, "%s", url);
rtsp_options(curl, uri);
/* request session description and write response to sdp file */
rtsp_describe(curl, uri, sdp_filename);
/* get media control attribute from sdp file */
get_media_control_attribute(sdp_filename,
control);
/* setup media stream */
sprintf(uri, "%s/%s", url, control);
rtsp_setup(curl, uri, transport);
/* start playing media stream */
sprintf(uri, "%s/", url);
rtsp_play(curl, uri, range);
printf
("Playing video, press any key to stop ...");
_getch();
printf("\n");
/* teardown session */
rtsp_teardown(curl, uri);
/* cleanup */
curl_easy_cleanup(curl);
curl = NULL;
} else {
fprintf(stderr, "curl_easy_init() failed\n");
}
curl_global_cleanup();
} else {
fprintf(stderr, "curl_global_init(%s) failed: %d\n",
"CURL_GLOBAL_ALL", res);
}
free(control);
free(sdp_filename);
free(uri);
}
return rc;
}
