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/* $Id: resampleplay.c 3664 2011-07-19 03:42:28Z nanang $ */
/*
* 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;
}
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