| /* $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; |
| |
| } |
| |
| |
| |