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- x-gateway: rodan.UU.NET from bug-lucid-emacs to alt.lucid-emacs.bug; Thu, 31 Dec 1992 05:26:04 EST
- From: amir@matis.ingr.com (Amir J Katz)
- Message-ID: <9212311003.AA07617@simpson.ingr.com>
- Subject: SUMMARY: Sound on Sun hogs /dev/audio?
- Organization: SEE Technologies Ltd.
- Reply-To: amir@matis.ingr.com
- X-Mailer: ELM [version 2.3 PL11]
- Date: Thu, 31 Dec 1992 10:26:05 GMT
- Newsgroups: alt.lucid-emacs.bug
- Path: sparky!uunet!wendy-fate.uu.net!bug-lucid-emacs
- Sender: bug-lucid-emacs-request@lucid.com
- Lines: 360
-
- Recently, I posted the follwing:
-
- >> Guys,
- >> When Lucid 19.3 is up on my Sun SS-1, no other audio playing program
- >> (audiotool, soundtol, play, rplay) can play anything. None of them complain,
- >> though, but no sound is heard. Only after I go into soundtool or audiotool,
- >> set the output to Jack and then back to Speaker, only then the audio
- >> programs start to play sounds. Playing any sound in lemacs reverts the situation.
- >> Apparently, Lucid audio code leaves /dev/audio is some bad state.
- >> Before I start hacking the code (asuming that I know what I'm doing :-), has
- >> anyone fixed that?
-
- The only response came from Mark Boyns (boyns@sciences.sdsu.edu) who said:
-
- Mark> I am not sure about your /dev/audio busy problem but I would like to
- Mark> recommend that you use my rplay package. rplay will allows you to play
- Mark> multiple sounds at once on local and remote machines. The source
- Mark> can be obtained at sounds.sdsu.edu along with about 350Megs of audio files.
- Mark>
- Mark> About your /dev/audio busy, are you sure the volume is not 0?
-
- The verdict:
- The culprit is the existing play.c in the src directory of Lucid Emacs 19.3.
- Jamie has sent me a new version that no longer hogs the device.
- It works fine on SunOS 4.1.3, but your mileage may vary...
-
- ---------- slice 'n' dice --------------------------------------- file: play.c
- /* play.c - play a sound file on the speaker
- **
- ** Copyright (C) 1989 by Jef Poskanzer.
- **
- ** Modified 24-May-91 by Jamie Zawinski (for Lucid Emacs.)
- ** Modified 17-Dec-92 by Jamie Zawinski (largely rewritten for SunOS 4.1.3.)
- **
- ** Permission to use, copy, modify, and distribute this software and its
- ** documentation for any purpose and without fee is hereby granted, provided
- ** that the above copyright notice appear in all copies and that both that
- ** copyright notice and this permission notice appear in supporting
- ** documentation. This software is provided "as is" without express or
- ** implied warranty.
- */
-
- #if __STDC__
- #include <stdlib.h>
- #include <unistd.h>
- #endif
-
- #include <stdio.h>
- #include <string.h>
- #include <sys/signal.h>
- #include <sys/fcntl.h>
- #include <sys/file.h>
-
- #include <multimedia/libaudio.h>
- #include <multimedia/audio_device.h>
-
- #if __STDC__ /* warning suppression */
- extern int audio__setplayhdr();
- extern int audio__setgain();
- extern int audio__flush();
- extern int audio_decode_filehdr();
- extern int audio_read_filehdr();
- extern int audio_cmp_hdr();
- extern int audio_enc_to_str();
- extern int audio_drain();
- extern void usleep();
- #endif
-
- #ifdef emacs
- extern char *sys_errlist[];
- extern int errno, sys_nerr;
- extern void message ();
- # define perror(string) \
- message("audio: %s, %s ", string, \
- (errno < sys_nerr) ? sys_errlist[errno] : \
- "unknown")
- # define warn(str) message ("audio: %s ", (str))
- #else /* !emacs */
- # define warn(str) fprintf (stderr, "%s\n", (str))
- #endif /* emacs */
-
- static void (*sighup_handler) ();
- static void (*sigint_handler) ();
- static void sighandler ();
-
- static int audio_fd;
-
- #define audio_open() open ("/dev/audio", (O_WRONLY | O_NDELAY))
-
- static int reset_volume_p, reset_device_p;
- static double old_volume;
- static Audio_hdr dev_hdr;
-
- static int
- init_device (volume, data, fd, header_length)
- int volume;
- unsigned char *data;
- int fd;
- int *header_length;
- {
- #ifdef SUNOS4_0_3
- if (header_length) *header_length = 0;
- return 0;
- #else
- Audio_hdr file_hdr;
-
- reset_volume_p = 0;
- reset_device_p = 0;
-
- if (data && fd) abort (); /* one or the other */
-
- if (AUDIO_SUCCESS != audio_get_play_config (audio_fd, &dev_hdr))
- {
- perror ("Not a valid audio device");
- return 1;
- }
-
- if (AUDIO_SUCCESS != (data
- ? audio_decode_filehdr (data, &file_hdr, header_length)
- : audio_read_filehdr (fd, &file_hdr, 0, 0)))
- {
- if (data)
- perror ("invalid audio data");
- else
- perror ("invalid audio file");
- return 1;
- }
-
- audio_flush_play (audio_fd);
-
- if (0 != audio_cmp_hdr (&dev_hdr, &file_hdr))
- {
- Audio_hdr new_hdr = file_hdr;
- reset_device_p = 1;
- if (AUDIO_SUCCESS != audio_set_play_config (audio_fd, &new_hdr))
- {
- char buf1 [100], buf2 [100], buf3 [250];
- audio_enc_to_str (&file_hdr, buf1);
- audio_enc_to_str (&new_hdr, buf2);
- sprintf (buf3, "wanted %s, got %s", buf1, buf2);
- warn (buf3);
- return 1;
- }
- }
-
- if (volume < 0 || volume > 100)
- {
- char buf [255];
- sprintf (buf, "volume must be between 0 and 100 (not %d)", volume);
- warn (buf);
- return 1;
- }
- {
- /* set the volume; scale it to 0.0 - 1.0 */
- double V = (volume / 100.0);
- audio_get_play_gain (audio_fd, &old_volume);
- reset_volume_p = 1;
- audio_set_play_gain (audio_fd, &V);
- }
-
- return 0;
- #endif
- }
-
- static void
- reset_device (wait_p)
- int wait_p;
- {
- if (wait_p)
- audio_drain (audio_fd, 1);
- else
- audio_flush_play (audio_fd);
- if (reset_device_p)
- audio_set_play_config (audio_fd, &dev_hdr);
- if (reset_volume_p)
- audio_set_play_gain (audio_fd, &old_volume);
- }
-
- void
- play_sound_file (sound_file, volume)
- char *sound_file;
- int volume;
- {
- int rrtn, wrtn;
- unsigned char buf [255];
- int file_fd;
-
- audio_fd = audio_open ();
-
- if (audio_fd < 0)
- {
- perror ("open /dev/audio");
- return;
- }
-
- sighup_handler = signal (SIGHUP, sighandler);
- sigint_handler = signal (SIGINT, sighandler);
-
- file_fd = open (sound_file, O_RDONLY);
- if (file_fd < 0)
- {
- perror (sound_file);
- goto END_OF_PLAY;
- }
-
- if (init_device (volume, 0, file_fd, 0))
- goto END_OF_PLAY;
-
- while (1)
- {
- rrtn = read (file_fd, (char *) buf, sizeof (buf));
- if (rrtn < 0)
- {
- perror ("read");
- goto END_OF_PLAY;
- }
- if (rrtn == 0)
- break;
-
- while (1)
- {
- wrtn = write (audio_fd, (char *) buf, rrtn);
- if (wrtn < 0)
- {
- perror ("write");
- goto END_OF_PLAY;
- }
- if (wrtn != 0)
- break;
-
- if (AUDIO_ERR_INTERRUPTED == audio_drain (audio_fd, 1))
- goto END_OF_PLAY;
- }
- if (wrtn != rrtn)
- {
- char buf [255];
- sprintf (buf, "play: rrtn = %d, wrtn = %d", rrtn, wrtn);
- warn (buf);
- goto END_OF_PLAY;
- }
- }
-
- END_OF_PLAY:
-
- if (file_fd > 0)
- close (file_fd);
-
- if (audio_fd > 0)
- {
- reset_device (1);
- close (audio_fd);
- }
-
- (void) signal (SIGHUP, sighup_handler);
- (void) signal (SIGINT, sigint_handler);
- }
-
- void
- play_sound_data (data, length, volume)
- unsigned char *data;
- int length, volume;
- {
- int wrtn, start = 0;
- int ilen;
-
- audio_fd = -1;
-
- if (length == 0) return;
-
- /* this is just to get a better error message */
- if (strncmp (".snd\0", (char *) data, 4))
- {
- warn ("Not valid audio data (bad magic number)");
- goto END_OF_PLAY;
- }
- if (length <= sizeof (Audio_hdr))
- {
- warn ("Not valid audio data (too short)");
- goto END_OF_PLAY;
- }
-
- audio_fd = audio_open ();
- if (audio_fd < 0)
- {
- perror ("open /dev/audio");
- return;
- }
-
- sighup_handler = signal (SIGHUP, sighandler);
- sigint_handler = signal (SIGINT, sighandler);
-
- if (init_device (volume, data, 0, &ilen))
- goto END_OF_PLAY;
-
- data += (ilen<<2);
- length -= (ilen<<2);
- if (length <= 1)
- goto END_OF_PLAY;
-
- while (1)
- {
- wrtn = write (audio_fd, (char *) (data+start), length-start);
- if (wrtn < 0)
- {
- perror ("write");
- goto END_OF_PLAY;
- }
- if (wrtn != 0)
- {
- start += wrtn;
- break;
- }
- if (AUDIO_ERR_INTERRUPTED == audio_drain (audio_fd, 1))
- goto END_OF_PLAY;
- }
- if (wrtn != length)
- {
- char buf [255];
- sprintf (buf, "play: rrtn = %d, wrtn = %d", length, wrtn);
- warn (buf);
- goto END_OF_PLAY;
- }
-
- END_OF_PLAY:
-
- if (audio_fd > 0)
- {
- reset_device (1);
- close (audio_fd);
- }
-
- (void) signal (SIGHUP, sighup_handler);
- (void) signal (SIGINT, sigint_handler);
- }
-
- static void
- sighandler (sig, code, scp, addr)
- int sig, code;
- struct sigcontext *scp;
- char *addr;
- {
- if (audio_fd > 0)
- {
- reset_device (0);
- close (audio_fd);
- }
- if (sig == SIGHUP && sighup_handler)
- sighup_handler (sig, code, scp, addr);
- else if (sig == SIGINT && sigint_handler)
- sigint_handler (sig, code, scp, addr);
- else
- exit (1);
- }
-
- --
- /* ----------------------------------------------------------- */
- /* Amir J. Katz | amir@matis.ingr.COM */
- /* System Specialist | Voice: +972 52-584684 */
- /* SEE Technologies Ltd. | Fax: +972 52-543917 */
- /* ............ Solaris 2.1 - The Final Frontier ? ........... */
-