/contrib/ntp/util/audio-pcm.c

  1/*
  2 * audio-pcm.c - Scope out the PCM audio stuff
  3 */
  4#ifdef HAVE_CONFIG_H
  5# include <config.h>
  6#endif
  7
  8#if defined(HAVE_MACHINE_SOUNDCARD_H) || defined(HAVE_SYS_SOUNDCARD_H)
  9
 10#include "audio.h"
 11#include "ntp_stdlib.h"
 12#include "ntp_syslog.h"
 13#ifdef HAVE_UNISTD_H
 14# include <unistd.h>
 15#endif
 16#include <stdio.h>
 17#include "ntp_string.h"
 18
 19#ifdef HAVE_SYS_IOCTL_H
 20#include <sys/ioctl.h>
 21#endif /* HAVE_SYS_IOCTL_H */
 22
 23#include <fcntl.h>
 24
 25#ifdef HAVE_MACHINE_SOUNDCARD_H
 26# include <machine/soundcard.h>
 27# define PCM_STYLE_SOUND
 28#else
 29# ifdef HAVE_SYS_SOUNDCARD_H
 30#  include <sys/soundcard.h>
 31#  define PCM_STYLE_SOUND
 32# endif
 33#endif
 34
 35/*
 36 * Global variables
 37 */
 38static int ctl_fd;		/* audio control file descriptor */
 39
 40const char *m_names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES ;
 41
 42void
 43d_fmt(
 44      unsigned int format
 45      )
 46{
 47
 48  if (format & AFMT_MU_LAW)	printf("MU_LAW ");
 49  if (format & AFMT_A_LAW)	printf("A_LAW ");
 50  if (format & AFMT_IMA_ADPCM)	printf("IMA_ADPCM ");
 51  if (format & AFMT_U8)		printf("U8 ");
 52  if (format & AFMT_S16_LE)	printf("S16_LE ");
 53  if (format & AFMT_S16_BE)	printf("S16_BE ");
 54  if (format & AFMT_S8)		printf("S8 ");
 55  if (format & AFMT_U16_LE)	printf("U16_LE ");
 56  if (format & AFMT_U16_BE)	printf("U16_BE ");
 57  if (format & AFMT_MPEG)	printf("MPEG ");
 58  if (format & AFMT_AC3)	printf("AC3 ");
 59  printf("\n");
 60}
 61
 62void
 63d_mixer(
 64	unsigned int mixer
 65	)
 66{
 67  int i;
 68  int n = 0;
 69
 70  for (i = 0; i < SOUND_MIXER_NRDEVICES; ++i)
 71    if ((1 << i) & mixer) {
 72      if (n)
 73	printf(", ");
 74      printf("%s", m_names[i]);
 75      n = 1;
 76    }
 77  printf("\n");
 78}
 79
 80int
 81main( )
 82{
 83	int	unit = 0;	/* device unit (0-3) */
 84# define AI_DEV		"/dev/audio%d"
 85# define AC_DEV		"/dev/mixer%d"
 86	char ai_dev[30];
 87	char ac_dev[30];
 88	struct snd_size s_size;
 89	snd_chan_param s_c_p;
 90	snd_capabilities s_c;
 91	int fd;
 92	int rval;
 93	char *dname = ai_dev;		/* device name */
 94	char *actl = ac_dev;
 95	int devmask = 0, recmask = 0, recsrc = 0;
 96
 97	(void)sprintf(ai_dev, AI_DEV, unit);
 98	(void)sprintf(ac_dev, AC_DEV, unit);
 99
100	/*
101	 * Open audio device. Do not complain if not there.
102	 */
103	fd = open(dname, O_RDWR | O_NONBLOCK, 0777);
104	if (fd < 0)
105		return (fd);
106
107	/*
108	 * Open audio control device.
109	 */
110	ctl_fd = open(actl, O_RDWR);
111	if (ctl_fd < 0) {
112		fprintf(stderr, "invalid control device <%s>\n", actl);
113		close(fd);
114		return(ctl_fd);
115	}
116
117	printf("input:   <%s> %d\n", dname, fd);
118	printf("control: <%s> %d\n", actl, ctl_fd);
119
120	if (ioctl(ctl_fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
121	    printf("SOUND_MIXER_READ_DEVMASK: %s\n", strerror(errno));
122	if (ioctl(ctl_fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
123	    printf("SOUND_MIXER_READ_RECMASK: %s\n", strerror(errno));
124	if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
125	    printf("SOUND_MIXER_READ_RECSRC: %s\n", strerror(errno));
126
127	printf("devmask: %#x recmask: %#x recsrc: %#x\n",
128		devmask, recmask, recsrc);
129	printf("Devmask: "); d_mixer(devmask);
130	printf("Recmask: "); d_mixer(recmask);
131	printf("RecSrc:  "); d_mixer(recsrc);
132
133	/*
134	 * Set audio device parameters.
135	 */
136	rval = fd;
137
138	if (ioctl(fd, AIOGSIZE, &s_size) == -1)
139	    printf("AIOGSIZE: %s\n", strerror(errno));
140	else
141	    printf("play_size %d, rec_size %d\n",
142		s_size.play_size, s_size.rec_size);
143
144	if (ioctl(fd, AIOGFMT, &s_c_p) == -1)
145	    printf("AIOGFMT: %s\n", strerror(errno));
146	else {
147	  printf("play_rate %lu, rec_rate %lu, play_format %#lx, rec_format %#lx\n",
148		 s_c_p.play_rate, s_c_p.rec_rate, s_c_p.play_format, s_c_p.rec_format);
149	  printf("Play format: "); d_fmt(s_c_p.play_format);
150	  printf("Rec format:  "); d_fmt(s_c_p.rec_format);
151	}
152
153}
154#endif /* HAVE_{MACHINE_SOUNDCARD,SYS_SOUNDCARD}_H */