155 lines
3.6 KiB
C
155 lines
3.6 KiB
C
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/*
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* audio-pcm.c - Scope out the PCM audio stuff
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#if defined(HAVE_MACHINE_SOUNDCARD_H) || defined(HAVE_SYS_SOUNDCARD_H)
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#include "audio.h"
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#include "ntp_stdlib.h"
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#include "ntp_syslog.h"
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include <stdio.h>
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#include "ntp_string.h"
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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif /* HAVE_SYS_IOCTL_H */
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#include <fcntl.h>
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#ifdef HAVE_MACHINE_SOUNDCARD_H
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# include <machine/soundcard.h>
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# define PCM_STYLE_SOUND
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#else
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# ifdef HAVE_SYS_SOUNDCARD_H
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# include <sys/soundcard.h>
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# define PCM_STYLE_SOUND
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# endif
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#endif
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/*
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* Global variables
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*/
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static int ctl_fd; /* audio control file descriptor */
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const char *m_names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES ;
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void
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d_fmt(
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unsigned int format
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)
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{
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if (format & AFMT_MU_LAW) printf("MU_LAW ");
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if (format & AFMT_A_LAW) printf("A_LAW ");
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if (format & AFMT_IMA_ADPCM) printf("IMA_ADPCM ");
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if (format & AFMT_U8) printf("U8 ");
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if (format & AFMT_S16_LE) printf("S16_LE ");
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if (format & AFMT_S16_BE) printf("S16_BE ");
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if (format & AFMT_S8) printf("S8 ");
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if (format & AFMT_U16_LE) printf("U16_LE ");
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if (format & AFMT_U16_BE) printf("U16_BE ");
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if (format & AFMT_MPEG) printf("MPEG ");
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if (format & AFMT_AC3) printf("AC3 ");
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printf("\n");
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}
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void
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d_mixer(
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unsigned int mixer
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)
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{
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int i;
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int n = 0;
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for (i = 0; i < SOUND_MIXER_NRDEVICES; ++i)
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if ((1 << i) & mixer) {
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if (n)
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printf(", ");
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printf("%s", m_names[i]);
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n = 1;
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}
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printf("\n");
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}
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int
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main( )
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{
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int unit = 0; /* device unit (0-3) */
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# define AI_DEV "/dev/audio%d"
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# define AC_DEV "/dev/mixer%d"
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char ai_dev[30];
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char ac_dev[30];
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struct snd_size s_size;
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snd_chan_param s_c_p;
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snd_capabilities s_c;
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int fd;
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int rval;
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char *dname = ai_dev; /* device name */
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char *actl = ac_dev;
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int devmask = 0, recmask = 0, recsrc = 0;
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(void)sprintf(ai_dev, AI_DEV, unit);
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(void)sprintf(ac_dev, AC_DEV, unit);
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/*
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* Open audio device. Do not complain if not there.
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*/
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fd = open(dname, O_RDWR | O_NONBLOCK, 0777);
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if (fd < 0)
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return (fd);
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/*
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* Open audio control device.
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*/
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ctl_fd = open(actl, O_RDWR);
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if (ctl_fd < 0) {
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fprintf(stderr, "invalid control device <%s>\n", actl);
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close(fd);
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return(ctl_fd);
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}
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printf("input: <%s> %d\n", dname, fd);
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printf("control: <%s> %d\n", actl, ctl_fd);
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if (ioctl(ctl_fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
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printf("SOUND_MIXER_READ_DEVMASK: %s\n", strerror(errno));
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if (ioctl(ctl_fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
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printf("SOUND_MIXER_READ_RECMASK: %s\n", strerror(errno));
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if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
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printf("SOUND_MIXER_READ_RECSRC: %s\n", strerror(errno));
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printf("devmask: %#x recmask: %#x recsrc: %#x\n",
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devmask, recmask, recsrc);
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printf("Devmask: "); d_mixer(devmask);
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printf("Recmask: "); d_mixer(recmask);
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printf("RecSrc: "); d_mixer(recsrc);
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/*
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* Set audio device parameters.
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*/
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rval = fd;
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if (ioctl(fd, AIOGSIZE, &s_size) == -1)
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printf("AIOGSIZE: %s\n", strerror(errno));
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else
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printf("play_size %d, rec_size %d\n",
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s_size.play_size, s_size.rec_size);
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if (ioctl(fd, AIOGFMT, &s_c_p) == -1)
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printf("AIOGFMT: %s\n", strerror(errno));
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else {
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printf("play_rate %lu, rec_rate %lu, play_format %#lx, rec_format %#lx\n",
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s_c_p.play_rate, s_c_p.rec_rate, s_c_p.play_format, s_c_p.rec_format);
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printf("Play format: "); d_fmt(s_c_p.play_format);
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printf("Rec format: "); d_fmt(s_c_p.rec_format);
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}
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}
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#endif /* HAVE_{MACHINE_SOUNDCARD,SYS_SOUNDCARD}_H */
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