Listencast is a simple shoutcast client that connects to any shoutcast server and logs the audio stream data to stdout. Requires libcurl.

listencast.c

/* listencast.c
 * A simple shoutcast client that
 * - Connects to any shoutcast server and
 * - Logs the audio stream data to stdout
 * 
 * Date 12-02-2013
 * 
 * Requires libcurl
 * $> sudo apt-get install libcurl4-gnutls-dev
 * 
 * Building listencast.c
 * $> gcc listencast.c -o listencast -lcurl
 * 
 * Running listencast
 * $> ./listencast <ip-addr>:<port> > <test.file>
 * Attempts to connect to the shoutcast server
 * running at <ip-addr> on port <port>. If successful
 * then writes the audio stream into the file <test.file>
 */

#include <curl/curl.h>

int main(int argc, char* argv[])
{
	CURL *curl;
	CURLcode res;

	/* URL of the radio-station in <ip-addr>:<port> format */
	char * webaddr = argv[1];

	/* init to NULL is important */
	struct curl_slist *headers=NULL;

	/* Comment the following line to request a pure
	 * audio stream WITHOUT any periodic channel-info or
	 * now-playing info embedded in the stream.
	 */
	headers = curl_slist_append(headers, "Icy-MetaData:1"); 

	/* Obtain a curl object handle */
	curl = curl_easy_init();

	if(curl) {
		curl_easy_setopt(curl, CURLOPT_URL, webaddr);

		/* pass our list of custom made headers */
		curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);

		/* Perform the request, res will get the return code */
		res = curl_easy_perform(curl);

		/* Ideally code following this line is NEVER executed
		 * as the radio station will reply with a continuous
		 * never-ending infinite encoded audio stream.
		 */

		/* Check for errors */
		if(res != CURLE_OK)
			fprintf(stderr,
				"curl_easy_perform() failed: %s\n",
				curl_easy_strerror(res));

		/* free the header list */ 
		curl_slist_free_all(headers);

		/* always cleanup */
		curl_easy_cleanup(curl);
	}

	return 0;
}