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+/* $Id$ */
+/* 
+ * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
+ * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+
+/**
+ * \page page_pjmedia_samples_resampleplay_c Samples: Using Resample Port
+ *
+ * This example demonstrates how to use @ref PJMEDIA_RESAMPLE_PORT to
+ * change the sampling rate of the media streams.
+ *
+ * This file is pjsip-apps/src/samples/resampleplay.c
+ *
+ * \includelineno resampleplay.c
+ */
+
+#include <pjmedia.h>
+#include <pjlib-util.h>
+#include <pjlib.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "util.h"
+
+/* For logging purpose. */
+#define THIS_FILE   "resampleplay.c"
+
+
+static const char *desc = 
+" FILE		    						    \n"
+"		    						    \n"
+"  resampleplay.c	    					    \n"
+"		    						    \n"
+" PURPOSE	    						    \n"
+"		    						    \n"
+"  Demonstrate how use resample port to play a WAV file to sound    \n"
+"  device using different sampling rate.			    \n"
+"		    						    \n"
+" USAGE		    						    \n"
+"		    						    \n"
+"  resampleplay [options] FILE.WAV				    \n"
+"		    						    \n"
+" where options:						    \n"
+SND_USAGE
+"		    						    \n"
+"  The WAV file could have mono or stereo channels with arbitrary   \n"
+"  sampling rate, but MUST contain uncompressed (i.e. 16bit) PCM.   \n";
+
+
+int main(int argc, char *argv[])
+{
+    pj_caching_pool cp;
+    pjmedia_endpt *med_endpt;
+    pj_pool_t *pool;
+    pjmedia_port *file_port;
+    pjmedia_port *resample_port;
+    pjmedia_snd_port *snd_port;
+    char tmp[10];
+    pj_status_t status;
+
+    int dev_id = -1;
+    int sampling_rate = CLOCK_RATE;
+    int channel_count = NCHANNELS;
+    int samples_per_frame = NSAMPLES;
+    int bits_per_sample = NBITS;
+    //int ptime;
+    //int down_samples;
+
+    /* Must init PJLIB first: */
+    status = pj_init();
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
+
+
+    /* Get options */
+    if (get_snd_options(THIS_FILE, argc, argv, &dev_id, &sampling_rate,
+			&channel_count, &samples_per_frame, &bits_per_sample))
+    {
+	puts("");
+	puts(desc);
+	return 1;
+    }
+
+    if (!argv[pj_optind]) {
+	puts("Error: no file is specified");
+	puts(desc);
+	return 1;
+    }
+
+    /* Must create a pool factory before we can allocate any memory. */
+    pj_caching_pool_init(&cp, &pj_pool_factory_default_policy, 0);
+
+    /* 
+     * Initialize media endpoint.
+     * This will implicitly initialize PJMEDIA too.
+     */
+    status = pjmedia_endpt_create(&cp.factory, NULL, 1, &med_endpt);
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
+
+    /* Create memory pool for our file player */
+    pool = pj_pool_create( &cp.factory,	    /* pool factory	    */
+			   "app",	    /* pool name.	    */
+			   4000,	    /* init size	    */
+			   4000,	    /* increment size	    */
+			   NULL		    /* callback on error    */
+			   );
+
+    /* Create the file port. */
+    status = pjmedia_wav_player_port_create( pool, argv[pj_optind], 0, 0,
+					     0, &file_port);
+    if (status != PJ_SUCCESS) {
+	app_perror(THIS_FILE, "Unable to open file", status);
+	return 1;
+    }
+
+    /* File must have same number of channels. */
+    if (PJMEDIA_PIA_CCNT(&file_port->info) != (unsigned)channel_count) {
+	PJ_LOG(3,(THIS_FILE, "Error: file has different number of channels. "
+			     "Perhaps you'd need -c option?"));
+	pjmedia_port_destroy(file_port);
+	return 1;
+    }
+
+    /* Calculate number of samples per frame to be taken from file port */
+    //ptime = samples_per_frame * 1000 / sampling_rate;
+
+    /* Create the resample port. */
+    status = pjmedia_resample_port_create( pool, file_port,
+					   sampling_rate, 0,
+					   &resample_port);
+    if (status != PJ_SUCCESS) {
+	app_perror(THIS_FILE, "Unable to create resample port", status);
+	return 1;
+    }
+
+    /* Create sound player port. */
+    status = pjmedia_snd_port_create( 
+		 pool,			/* pool			    */
+		 dev_id,		/* device		    */
+		 dev_id,		/* device		    */
+		 sampling_rate,		/* clock rate.		    */
+		 channel_count,		/* # of channels.	    */
+		 samples_per_frame,	/* samples per frame.	    */
+		 bits_per_sample,	/* bits per sample.	    */
+		 0,			/* options		    */
+		 &snd_port		/* returned port	    */
+		 );
+    if (status != PJ_SUCCESS) {
+	app_perror(THIS_FILE, "Unable to open sound device", status);
+	return 1;
+    }
+
+    /* Connect resample port to sound device */
+    status = pjmedia_snd_port_connect( snd_port, resample_port);
+    if (status != PJ_SUCCESS) {
+	app_perror(THIS_FILE, "Error connecting sound ports", status);
+	return 1;
+    }
+
+
+    /* Dump memory usage */
+    dump_pool_usage(THIS_FILE, &cp);
+
+    /* 
+     * File should be playing and looping now, using sound device's thread. 
+     */
+
+
+    /* Sleep to allow log messages to flush */
+    pj_thread_sleep(100);
+
+
+    printf("Playing %s at sampling rate %d (original file sampling rate=%d)\n",
+	   argv[pj_optind], sampling_rate,
+	   PJMEDIA_PIA_SRATE(&file_port->info));
+    puts("");
+    puts("Press <ENTER> to stop playing and quit");
+
+    if (fgets(tmp, sizeof(tmp), stdin) == NULL) {
+	puts("EOF while reading stdin, will quit now..");
+    }
+    
+    /* Start deinitialization: */
+
+
+    /* Destroy sound device */
+    status = pjmedia_snd_port_destroy( snd_port );
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
+
+
+    /* Destroy resample port. 
+     * This will destroy all downstream ports (e.g. the file port)
+     */
+    status = pjmedia_port_destroy( resample_port );
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
+
+
+    /* Release application pool */
+    pj_pool_release( pool );
+
+    /* Destroy media endpoint. */
+    pjmedia_endpt_destroy( med_endpt );
+
+    /* Destroy pool factory */
+    pj_caching_pool_destroy( &cp );
+
+    /* Shutdown PJLIB */
+    pj_shutdown();
+
+
+    /* Done. */
+    return 0;
+
+}
+
+
+