Added level.c to samples collection

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@344 74dad513-b988-da41-8d7b-12977e46ad98

3 files changed, 150 insertions, 2 deletions

diff --git a/pjsip-apps/build/Samples-vc.mak b/pjsip-apps/build/Samples-vc.mak
index bdb7c7f8..5d7ca08c 100644
--- a/pjsip-apps/build/Samples-vc.mak
+++ b/pjsip-apps/build/Samples-vc.mak
@@ -38,7 +38,8 @@ BINDIR = ..\bin\samples
 
 
 SAMPLES = $(BINDIR)\simpleua.exe $(BINDIR)\playfile.exe $(BINDIR)\playsine.exe \
-	  $(BINDIR)\confsample.exe $(BINDIR)\sndinfo.exe
+	  $(BINDIR)\confsample.exe $(BINDIR)\sndinfo.exe \
+	  $(BINDIR)\level.exe
 
 all: $(OBJDIR) $(SAMPLES)
 
diff --git a/pjsip-apps/build/Samples.mak b/pjsip-apps/build/Samples.mak
index eccb87e8..e99164c9 100644
--- a/pjsip-apps/build/Samples.mak
+++ b/pjsip-apps/build/Samples.mak
@@ -41,7 +41,7 @@ BINDIR := ../bin/samples
 CFLAGS = $(_CFLAGS)
 LDFLAGS = $(_LDFLAGS)
 
-SAMPLES := simpleua playfile playsine confsample sndinfo
+SAMPLES := simpleua playfile playsine confsample sndinfo level
 
 EXES := $(foreach file, $(SAMPLES), $(BINDIR)/$(file)-$(MACHINE_NAME)-$(OS_NAME)-$(CC_NAME)$(HOST_EXE))
 
diff --git a/pjsip-apps/src/samples/level.c b/pjsip-apps/src/samples/level.c
new file mode 100644
index 00000000..034c695e
--- /dev/null
+++ b/pjsip-apps/src/samples/level.c
@@ -0,0 +1,147 @@
+/* $Id$ */
+/* 
+ * Copyright (C) 2003-2006 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 
+ */
+
+static const char *desc = 
+ " FILE:								    \n"
+ "  level.c								    \n"
+ "									    \n"
+ " PURPOSE:								    \n"
+ "  Read PCM WAV file and display the audio level the first 100 frames.     \n"
+ "  Each frame is assumed to have 160 samples.				    \n"
+ "									    \n"
+ " USAGE:								    \n"
+ "  level file.wav							    \n"
+ "									    \n"
+ "  The WAV file SHOULD have a 16bit mono samples.			    ";
+
+#include <pjmedia.h>
+#include <pjlib.h>
+
+#include <stdio.h>
+
+/* For logging purpose. */
+#define THIS_FILE   "level.c"
+
+
+/* Util to display the error message for the specified error code  */
+static int app_perror( const char *sender, const char *title, 
+		       pj_status_t status)
+{
+    char errmsg[PJ_ERR_MSG_SIZE];
+
+    pj_strerror(status, errmsg, sizeof(errmsg));
+
+    printf("%s: %s [code=%d]\n", title, errmsg, status);
+    return 1;
+}
+
+
+/*
+ * main()
+ */
+int main(int argc, char *argv[])
+{
+    enum { NSAMPLES = 160, COUNT=100 };
+    pj_caching_pool cp;
+    pjmedia_endpt *med_endpt;
+    pj_pool_t *pool;
+    pjmedia_port *file_port;
+    int i;
+    pj_status_t status;
+
+
+    /* Verify cmd line arguments. */
+    if (argc != 2) {
+	puts("");
+	puts(desc);
+	return 1;
+    }
+
+    /* Must init PJLIB first: */
+    status = pj_init();
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, 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, &med_endpt);
+    PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
+
+    /* Create memory pool for our file player */
+    pool = pj_pool_create( &cp.factory,	    /* pool factory	    */
+			   "wav",	    /* pool name.	    */
+			   4000,	    /* init size	    */
+			   4000,	    /* increment size	    */
+			   NULL		    /* callback on error    */
+			   );
+
+    /* Create file media port from the WAV file */
+    status = pjmedia_file_player_port_create( pool,	/* memory pool	    */
+					      argv[1],	/* file to play	    */
+					      0,	/* flags	    */
+					      0,	/* default buffer   */
+					      NULL,	/* user data	    */
+					      &file_port/* returned port    */
+					      );
+    if (status != PJ_SUCCESS) {
+	app_perror(THIS_FILE, "Unable to use WAV file", status);
+	return 1;
+    }
+
+    for (i=0; i<COUNT; ++i) {
+	pj_int16_t framebuf[NSAMPLES];
+	pjmedia_frame frm;
+	pj_int32_t level32;
+	int level;
+
+	frm.buf = framebuf;
+	frm.size = sizeof(framebuf);
+	
+	pjmedia_port_get_frame(file_port, &frm);
+
+	level32 = pjmedia_calc_avg_signal( framebuf, NSAMPLES );
+	level = linear2ulaw(level32) ^ 0xFF;
+
+	printf("%d ", level);
+    }
+    puts("");
+    
+
+    /* Destroy file port */
+    status = pjmedia_port_destroy( file_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 );
+
+
+    /* Done. */
+    return 0;
+}
+