ubuntu怎么安装audio插件
使用如下命令：sudo apt-get install libpulse-dev安装时会提示依赖于下面这几个软件，一并安装即可：libavahi-client-dev libavahi-common-dev libpulse-mainloop-glib0 libpulse0这个也可以上packages.ubuntu.com官方网址查询libpulse-dev软件的依赖关系，相关链接如下：http://packages.ubuntu.com/raring/libpulse-dev如下图所示：二、pulseaudio库的使用（同步simple API）pulseaudio官网有关于pulseaudio的API doxygen使用手册，网址如下：http://freedesktop.org/software/pulseaudio/doxygen/1、播音sampleA simple playback tool using the simple API//pacat-simple.c/***This file is part of PulseAudio.PulseAudio is free software; you can redistribute it and/or modifyit under the terms of the GNU Lesser General Public License as publishedby the Free Software Foundation; either version 2.1 of the License,or (at your option) any later version.PulseAudio is distributed in the hope that it will be useful, butWITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNUGeneral Public License for more details.You should have received a copy of the GNU Lesser General Public Licensealong with PulseAudio; if not, write to the Free SoftwareFoundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307USA.***/#ifdef HAVE_CONFIG_H#include #endif#include #include #include #include #include #include #include #define BUFSIZE 1024int main(int argc, char*argv[]) {/* The Sample format to use */static const pa_sample_spec ss = {.format = PA_SAMPLE_S16LE,.rate = 44100,.channels = 2};pa_simple *s = NULL;int ret = 1;int error;/* replace STDIN with the specified file if needed */if (argc > 1) {int fd;if ((fd = open(argv[1], O_RDONLY)) < 0) {fprintf(stderr, __FILE__": open() failed: %s\n", strerror(errno));goto finish;}if (dup2(fd, STDIN_FILENO) < 0) {fprintf(stderr, __FILE__": dup2() failed: %s\n", strerror(errno));goto finish;}close(fd);}/* Create a new playback stream */if (!(s = pa_simple_new(NULL, argv[0], PA_STREAM_PLAYBACK, NULL, "playback", &ss, NULL, NULL, &error))) {fprintf(stderr, __FILE__": pa_simple_new() failed: %s\n", pa_strerror(error));goto finish;}for (;;) {uint8_t buf[BUFSIZE];ssize_t r;#if 0pa_usec_t latency;if ((latency = pa_simple_get_latency(s, &error)) == (pa_usec_t) -1) {fprintf(stderr, __FILE__": pa_simple_get_latency() failed: %s\n", pa_strerror(error));goto finish;}fprintf(stderr, "%0.0f usec \r", (float)latency);#endif/* Read some data ... */if ((r = read(STDIN_FILENO, buf, sizeof(buf))) <= 0) {if (r == 0) /* EOF */break;fprintf(stderr, __FILE__": read() failed: %s\n", strerror(errno));goto finish;}/* ... and play it */if (pa_simple_write(s, buf, (size_t) r, &error) < 0) {fprintf(stderr, __FILE__": pa_simple_write() failed: %s\n", pa_strerror(error));goto finish;}}/* Make sure that every single sample was played */if (pa_simple_drain(s, &error) < 0) {fprintf(stderr, __FILE__": pa_simple_drain() failed: %s\n", pa_strerror(error));goto finish;}ret = 0;finish:if (s)pa_simple_free(s);return ret;}2、录音sample A simple recording tool using the simple API //parec-simple.c/***This file is part of PulseAudio.PulseAudio is free software; you can redistribute it and/or modifyit under the terms of the GNU Lesser General Public License as publishedby the Free Software Foundation; either version 2.1 of the License,or (at your option) any later version.PulseAudio is distributed in the hope that it will be useful, butWITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNUGeneral Public License for more details.You should have received a copy of the GNU Lesser General Public Licensealong with PulseAudio; if not, write to the Free SoftwareFoundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307USA.***/#ifdef HAVE_CONFIG_H#include #endif#include #include #include #include #include #include #define BUFSIZE 1024/* A simple routine calling UNIX write() in a loop */static ssize_t loop_write(int fd, const void*data, size_t size) {ssize_t ret = 0;while (size > 0) {ssize_t r;if ((r = write(fd, data, size)) < 0)return r;if (r == 0)break;ret += r;data = (const uint8_t*) data + r;size -= (size_t) r;}return ret;}int main(int argc, char*argv[]) {/* The sample type to use */static const pa_sample_spec ss = {.format = PA_SAMPLE_S16LE,.rate = 44100,.channels = 2};pa_simple *s = NULL;int ret = 1;int error;/* Create the recording stream */if (!(s = pa_simple_new(NULL, argv[0], PA_STREAM_RECORD, NULL, "record", &ss, NULL, NULL, &error))) {fprintf(stderr, __FILE__": pa_simple_new() failed: %s\n", pa_strerror(error));goto finish;}for (;;) {uint8_t buf[BUFSIZE];/* Record some data ... */if (pa_simple_read(s, buf, sizeof(buf), &error) < 0) {fprintf(stderr, __FILE__": pa_simple_read() failed: %s\n", pa_strerror(error));goto finish;}/* And write it to STDOUT */if (loop_write(STDOUT_FILENO, buf, sizeof(buf)) != sizeof(buf)) {fprintf(stderr, __FILE__": write() failed: %s\n", strerror(errno));goto finish;}}ret = 0;finish:if (s)pa_simple_free(s);return ret;}3、编译含有pulseaudio库的时候，需要添加pulseaudio的动态链接库-libpulse等，(可以在/usr/lib/i386-linux-gnu/目录下找到pulse的动态库/usr/lib/i386-linux-gnu/libpulsecommon-1.1.so/usr/lib/i386-linux-gnu/libpulsedsp.so/usr/lib/i386-linux-gnu/libpulse-mainloop-glib.so/usr/lib/i386-linux-gnu/libpulse-mainloop-glib.so.0/usr/lib/i386-linux-gnu/libpulse-mainloop-glib.so.0.0.4/usr/lib/i386-linux-gnu/libpulse-simple.so/usr/lib/i386-linux-gnu/libpulse-simple.so.0/usr/lib/i386-linux-gnu/libpulse-simple.so.0.0.3/usr/lib/i386-linux-gnu/libpulse.so/usr/lib/i386-linux-gnu/libpulse.so.0/usr/lib/i386-linux-gnu/libpulse.so.0.13.5)例如： gcc -o pacat-simple pacat-simple.c -lpulse -lpulsecommon-1.1 -lpulse-simple三、ALSA音频库 ALSA全称为：Advanced Linux Sound Architecture一个网址为：http://www.alsa-project.org/main/index.php/Main_Page
什么linux系统占用资源少点
Linux系统本身就以占用资源少为其优点。为了更多的节省资源，普通用户切记不要使用服务器版的Linux，比如redhat enterprise server、centos等等。建议使用ubuntu、国内的redflag、深度deepin linux等系统。这类系统占用资源极低，下面是ubuntu系统官方给出的最低配置及推荐配置，有此可见一斑。
Ubuntu的最低配置：
在外观首选项里关闭特殊“视觉效果”后，下面配置可以流畅地运行Ubuntu：
CPU：700 MHz；
内存：384 MB；
硬盘：6 GB 剩余空间；
显卡：800x600以上分辨率；
Ubuntu推荐配置：
拥有以下硬件配置，可以打开视觉效果，令电脑产生美轮美奂的极具吸引力的效果：
CPU：1.2 GHz；
内存：512 MB；
硬盘：8 GB 剩余空间；
显卡：1024x768以上分辨率。
