diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/examples/rtsp.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/docs/examples/rtsp.c b/docs/examples/rtsp.c new file mode 100644 index 000000000..2fe912c63 --- /dev/null +++ b/docs/examples/rtsp.c @@ -0,0 +1,253 @@ +/*
+ * Copyright (c) 2011, Jim Hollinger
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Jim Hollinger nor the names of its contributors
+ * may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if defined (WIN32)
+# include <conio.h> // _getch()
+#else
+# include <termios.h>
+# include <unistd.h>
+
+ int _getch(void) {
+ struct termios oldt, newt;
+ tcgetattr( STDIN_FILENO, &oldt );
+ newt = oldt;
+ newt.c_lflag &= ~( ICANON | ECHO );
+ tcsetattr( STDIN_FILENO, TCSANOW, &newt );
+ int ch = getchar();
+ tcsetattr( STDIN_FILENO, TCSANOW, &oldt );
+ return ch;
+ }
+#endif
+
+#include <curl/curl.h>
+
+#define VERSION_STR "V1.0"
+
+// error handling macros
+#define my_curl_easy_setopt(A, B, C) \
+ if ((res = curl_easy_setopt((A), (B), (C))) != CURLE_OK) \
+ fprintf(stderr, "curl_easy_setopt(%s, %s, %s) failed: %d\n", #A, #B, #C, res);
+
+#define my_curl_easy_perform(A) \
+ if ((res = curl_easy_perform((A))) != CURLE_OK) \
+ fprintf(stderr, "curl_easy_perform(%s) failed: %d\n", #A, res);
+
+
+// send RTSP OPTIONS request
+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, CURL_RTSPREQ_OPTIONS);
+ my_curl_easy_perform(curl);
+}
+
+
+// send RTSP DESCRIBE request and write sdp response to a file
+void rtsp_describe(CURL *curl, const char *uri, const char *sdp_filename) {
+ CURLcode res = CURLE_OK;
+ printf("\nRTSP: DESCRIBE %s\n", uri);
+ FILE *sdp_fp = fopen(sdp_filename, "wt");
+ 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, CURL_RTSPREQ_DESCRIBE);
+ my_curl_easy_perform(curl);
+ my_curl_easy_setopt(curl, CURLOPT_WRITEDATA, stdout);
+ if (sdp_fp != stdout) {
+ fclose(sdp_fp);
+ }
+}
+
+
+// send RTSP SETUP request
+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, CURL_RTSPREQ_SETUP);
+ my_curl_easy_perform(curl);
+}
+
+
+// send RTSP PLAY request
+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, CURL_RTSPREQ_PLAY);
+ my_curl_easy_perform(curl);
+}
+
+
+// send RTSP TEARDOWN request
+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, CURL_RTSPREQ_TEARDOWN);
+ my_curl_easy_perform(curl);
+}
+
+
+// convert url into an sdp filename
+void get_sdp_filename(const char *url, char *sdp_filename) {
+ strcpy(sdp_filename, "video.sdp");
+ const char *s = strrchr(url, '/');
+ if (s != NULL) {
+ s++;
+ if (s[0] != '\0') {
+ sprintf(sdp_filename, "%s.sdp", s);
+ }
+ }
+}
+
+
+// scan sdp file for media control attribute
+void get_media_control_attribute(const char *sdp_filename, char *control) {
+ control[0] = '\0';
+ int max_len = 256;
+ char *s = new char[max_len];
+ FILE *sdp_fp = fopen(sdp_filename, "rt");
+ if (sdp_fp != NULL) {
+ while (fgets(s, max_len - 2, sdp_fp) != NULL) {
+ sscanf(s, " a = control: %s", control);
+ }
+ fclose(sdp_fp);
+ }
+ delete []s;
+}
+
+
+// main app
+int main(int argc, char * const argv[]) {
+ const char *transport = "RTP/AVP;unicast;client_port=1234-1235"; // UDP
+// const char *transport = "RTP/AVP/TCP;unicast;client_port=1234-1235"; // TCP
+ const char *range = "0.000-";
+ int rc = EXIT_SUCCESS;
+
+ 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
+ char *basename = NULL;
+ if ((argc != 2) && (argc != 3)) {
+ basename = strrchr(argv[0], '/');
+ if (basename == NULL) {
+ basename = strrchr(argv[0], '\\');
+ }
+ if (basename == NULL) {
+ basename = argv[0];
+ } else {
+ basename++;
+ }
+ printf("Usage: %s url [transport]\n", basename);
+ 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", basename);
+ rc = EXIT_FAILURE;
+ } else {
+ const char *url = argv[1];
+ char *uri = new char[strlen(url) + 32];
+ char *sdp_filename = new char[strlen(url) + 32];
+ char *control = new char[strlen(url) + 32];
+ get_sdp_filename(url, sdp_filename);
+ if (argc == 3) {
+ transport = argv[2];
+ }
+
+ // initialize curl
+ CURLcode res = CURLE_OK;
+ res = curl_global_init(CURL_GLOBAL_ALL);
+ if (res == CURLE_OK) {
+ curl_version_info_data *data = curl_version_info(CURLVERSION_NOW);
+ fprintf(stderr, " cURL V%s loaded\n", data->version);
+
+ // initialize this curl session
+ CURL *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_WRITEHEADER, 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\n", "CURL_GLOBAL_ALL", res);
+ }
+ delete []control;
+ delete []sdp_filename;
+ delete []uri;
+ }
+
+ return rc;
+}
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