parec-simple.c

A simple recording tool using the simple API

00001 /* $Id: parec-simple.c 1033 2006-06-19 21:53:48Z lennart $ */
00002 
00003 /***
00004   This file is part of PulseAudio.
00005  
00006   PulseAudio is free software; you can redistribute it and/or modify
00007   it under the terms of the GNU Lesser General Public License as published
00008   by the Free Software Foundation; either version 2 of the License,
00009   or (at your option) any later version.
00010  
00011   PulseAudio is distributed in the hope that it will be useful, but
00012   WITHOUT ANY WARRANTY; without even the implied warranty of
00013   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
00014   General Public License for more details.
00015  
00016   You should have received a copy of the GNU Lesser General Public License
00017   along with PulseAudio; if not, write to the Free Software
00018   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00019   USA.
00020 ***/
00021 
00022 #ifdef HAVE_CONFIG_H
00023 #include <config.h>
00024 #endif
00025 
00026 #include <stdio.h>
00027 #include <unistd.h>
00028 #include <string.h>
00029 #include <errno.h>
00030 
00031 #include <pulse/simple.h>
00032 #include <pulse/error.h>
00033 #include <pulsecore/gccmacro.h>
00034 
00035 #define BUFSIZE 1024
00036 
00037 /* A simple routine calling UNIX write() in a loop */
00038 static ssize_t loop_write(int fd, const void*data, size_t size) {
00039     ssize_t ret = 0;
00040 
00041     while (size > 0) {
00042         ssize_t r;
00043 
00044         if ((r = write(fd, data, size)) < 0)
00045             return r;
00046 
00047         if (r == 0)
00048             break;
00049         
00050         ret += r;
00051         data = (const uint8_t*) data + r;
00052         size -= r;
00053     }
00054 
00055     return ret;
00056 }
00057 
00058 int main(PA_GCC_UNUSED int argc, char*argv[]) {
00059     /* The sample type to use */
00060     static const pa_sample_spec ss = {
00061         .format = PA_SAMPLE_S16LE,
00062         .rate = 44100,
00063         .channels = 2
00064     };
00065     pa_simple *s = NULL;
00066     int ret = 1;
00067     int error;
00068 
00069     /* Create the recording stream */
00070     if (!(s = pa_simple_new(NULL, argv[0], PA_STREAM_RECORD, NULL, "record", &ss, NULL, NULL, &error))) {
00071         fprintf(stderr, __FILE__": pa_simple_new() failed: %s\n", pa_strerror(error));
00072         goto finish;
00073     }
00074 
00075     for (;;) {
00076         uint8_t buf[BUFSIZE];
00077         ssize_t r;
00078 
00079         /* Record some data ... */
00080         if (pa_simple_read(s, buf, sizeof(buf), &error) < 0) {
00081             fprintf(stderr, __FILE__": pa_simple_read() failed: %s\n", pa_strerror(error));
00082             goto finish;
00083         }
00084 
00085         /* And write it to STDOUT */
00086         if ((r = loop_write(STDOUT_FILENO, buf, sizeof(buf))) <= 0) {
00087             fprintf(stderr, __FILE__": write() failed: %s\n", strerror(errno));
00088             goto finish;
00089         }
00090     }
00091 
00092     ret = 0;
00093 
00094 finish:
00095 
00096     if (s)
00097         pa_simple_free(s);
00098     
00099     return ret;
00100 }

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