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Diffstat (limited to 'pjsip-apps/src/samples/resampleplay.c')
| -rw-r--r-- | pjsip-apps/src/samples/resampleplay.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/pjsip-apps/src/samples/resampleplay.c b/pjsip-apps/src/samples/resampleplay.c new file mode 100644 index 0000000..c73b2e3 --- /dev/null +++ b/pjsip-apps/src/samples/resampleplay.c @@ -0,0 +1,232 @@ +/* $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; + +} + + + |