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/* -*- c-basic-offset: 8 -*- |
| 2 |
rdesktop: A Remote Desktop Protocol client. |
| 3 |
Sound Channel Process Functions - Open Sound System |
| 4 |
Copyright (C) Matthew Chapman 2003-2008 |
| 5 |
Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003 |
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Copyright 2006-2008 Pierre Ossman <ossman@cendio.se> for Cendio AB |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
| 11 |
(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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|
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/* |
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This is a workaround for Esound bug 312665. |
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FIXME: Remove this when Esound is fixed. |
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*/ |
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#ifdef _FILE_OFFSET_BITS |
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#undef _FILE_OFFSET_BITS |
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#endif |
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|
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#include <assert.h> |
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|
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#include "rdesktop.h" |
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#include "rdpsnd.h" |
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#include "rdpsnd_dsp.h" |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <errno.h> |
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#include <unistd.h> |
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#include <sys/time.h> |
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#include <sys/ioctl.h> |
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#include <sys/soundcard.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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|
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#define DEFAULTDEVICE "/dev/dsp" |
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#define MAX_LEN 512 |
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|
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static int dsp_fd = -1; |
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static int dsp_mode; |
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|
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static RD_BOOL dsp_configured; |
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static RD_BOOL dsp_broken; |
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|
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static int stereo; |
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static int format; |
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static uint32 snd_rate; |
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static short samplewidth; |
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static char *dsp_dev; |
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static RD_BOOL in_esddsp; |
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|
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/* This is a just a forward declaration */ |
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static struct audio_driver oss_driver; |
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|
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static void oss_play(void); |
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static void oss_record(void); |
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static RD_BOOL oss_set_format(RD_WAVEFORMATEX * pwfx); |
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|
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static void |
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oss_add_fds(int *n, fd_set * rfds, fd_set * wfds, struct timeval *tv) |
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{ |
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if (dsp_fd == -1) |
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return; |
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|
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if ((dsp_mode == O_WRONLY || dsp_mode == O_RDWR) && !rdpsnd_queue_empty()) |
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FD_SET(dsp_fd, wfds); |
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if (dsp_mode == O_RDONLY || dsp_mode == O_RDWR) |
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FD_SET(dsp_fd, rfds); |
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if (dsp_fd > *n) |
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*n = dsp_fd; |
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} |
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|
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static void |
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oss_check_fds(fd_set * rfds, fd_set * wfds) |
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{ |
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if (FD_ISSET(dsp_fd, wfds)) |
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oss_play(); |
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if (FD_ISSET(dsp_fd, rfds)) |
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oss_record(); |
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} |
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|
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static RD_BOOL |
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detect_esddsp(void) |
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{ |
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struct stat s; |
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char *preload; |
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|
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if (fstat(dsp_fd, &s) == -1) |
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return False; |
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|
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if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode)) |
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return False; |
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|
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preload = getenv("LD_PRELOAD"); |
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if (preload == NULL) |
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return False; |
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|
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if (strstr(preload, "esddsp") == NULL) |
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return False; |
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|
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return True; |
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} |
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|
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|
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static void |
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oss_restore_format() |
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{ |
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RD_WAVEFORMATEX wfx; |
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memset(&wfx, 0, sizeof(RD_WAVEFORMATEX)); |
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switch (format) |
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{ |
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case AFMT_U8: |
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wfx.wBitsPerSample = 8; |
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break; |
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case AFMT_S16_LE: |
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wfx.wBitsPerSample = 16; |
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break; |
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default: |
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wfx.wBitsPerSample = 0; |
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} |
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wfx.nChannels = stereo ? 2 : 1; |
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wfx.nSamplesPerSec = snd_rate; |
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oss_set_format(&wfx); |
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} |
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|
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|
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static RD_BOOL |
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oss_open(int wanted) |
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{ |
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if (dsp_fd != -1) |
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{ |
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if (wanted == dsp_mode) |
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{ |
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/* should probably not happen */ |
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return True; |
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} |
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else |
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{ |
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/* device open but not our mode. Before |
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reopening O_RDWR, verify that the device is |
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duplex capable */ |
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int caps; |
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ioctl(dsp_fd, SNDCTL_DSP_SETDUPLEX, 0); |
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if ((ioctl(dsp_fd, SNDCTL_DSP_GETCAPS, &caps) < 0) |
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|| !(caps & DSP_CAP_DUPLEX)) |
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{ |
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warning("This device is not capable of full duplex operation.\n"); |
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return False; |
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} |
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close(dsp_fd); |
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dsp_mode = O_RDWR; |
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} |
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} |
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else |
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{ |
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dsp_mode = wanted; |
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} |
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|
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dsp_configured = False; |
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dsp_broken = False; |
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|
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dsp_fd = open(dsp_dev, dsp_mode | O_NONBLOCK); |
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|
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if (dsp_fd == -1) |
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{ |
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perror(dsp_dev); |
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return False; |
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} |
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|
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in_esddsp = detect_esddsp(); |
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|
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return True; |
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} |
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|
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static void |
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oss_close(void) |
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{ |
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close(dsp_fd); |
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dsp_fd = -1; |
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} |
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|
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static RD_BOOL |
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oss_open_out(void) |
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{ |
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if (!oss_open(O_WRONLY)) |
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return False; |
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|
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return True; |
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} |
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|
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static void |
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oss_close_out(void) |
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{ |
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oss_close(); |
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if (dsp_mode == O_RDWR) |
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{ |
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if (oss_open(O_RDONLY)) |
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oss_restore_format(); |
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} |
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|
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/* Ack all remaining packets */ |
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while (!rdpsnd_queue_empty()) |
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rdpsnd_queue_next(0); |
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} |
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|
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static RD_BOOL |
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oss_open_in(void) |
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{ |
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if (!oss_open(O_RDONLY)) |
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return False; |
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|
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return True; |
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} |
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|
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static void |
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oss_close_in(void) |
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{ |
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oss_close(); |
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if (dsp_mode == O_RDWR) |
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{ |
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if (oss_open(O_WRONLY)) |
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oss_restore_format(); |
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} |
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} |
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|
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static RD_BOOL |
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oss_format_supported(RD_WAVEFORMATEX * pwfx) |
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{ |
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if (pwfx->wFormatTag != WAVE_FORMAT_PCM) |
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return False; |
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if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2)) |
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return False; |
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if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16)) |
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return False; |
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|
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return True; |
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} |
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|
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static RD_BOOL |
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oss_set_format(RD_WAVEFORMATEX * pwfx) |
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{ |
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int fragments; |
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static RD_BOOL driver_broken = False; |
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|
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assert(dsp_fd != -1); |
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|
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if (dsp_configured) |
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{ |
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if ((pwfx->wBitsPerSample == 8) && (format != AFMT_U8)) |
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return False; |
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if ((pwfx->wBitsPerSample == 16) && (format != AFMT_S16_LE)) |
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return False; |
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|
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if ((pwfx->nChannels == 2) != !!stereo) |
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return False; |
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|
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if (pwfx->nSamplesPerSec != snd_rate) |
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return False; |
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|
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return True; |
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} |
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|
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ioctl(dsp_fd, SNDCTL_DSP_RESET, NULL); |
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ioctl(dsp_fd, SNDCTL_DSP_SYNC, NULL); |
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|
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if (pwfx->wBitsPerSample == 8) |
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format = AFMT_U8; |
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else if (pwfx->wBitsPerSample == 16) |
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format = AFMT_S16_LE; |
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|
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samplewidth = pwfx->wBitsPerSample / 8; |
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|
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if (ioctl(dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1) |
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{ |
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perror("SNDCTL_DSP_SETFMT"); |
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oss_close(); |
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return False; |
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} |
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|
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if (pwfx->nChannels == 2) |
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{ |
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stereo = 1; |
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samplewidth *= 2; |
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} |
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else |
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{ |
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stereo = 0; |
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} |
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|
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if (ioctl(dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1) |
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{ |
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perror("SNDCTL_DSP_CHANNELS"); |
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oss_close(); |
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return False; |
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} |
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|
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oss_driver.need_resampling = 0; |
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snd_rate = pwfx->nSamplesPerSec; |
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if (ioctl(dsp_fd, SNDCTL_DSP_SPEED, &snd_rate) == -1) |
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{ |
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uint32 rates[] = { 44100, 48000, 0 }; |
| 312 |
uint32 *prates = rates; |
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|
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while (*prates != 0) |
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{ |
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if ((pwfx->nSamplesPerSec != *prates) |
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&& (ioctl(dsp_fd, SNDCTL_DSP_SPEED, prates) != -1)) |
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{ |
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oss_driver.need_resampling = 1; |
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snd_rate = *prates; |
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if (rdpsnd_dsp_resample_set |
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(snd_rate, pwfx->wBitsPerSample, pwfx->nChannels) == False) |
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{ |
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error("rdpsnd_dsp_resample_set failed"); |
| 325 |
oss_close(); |
| 326 |
return False; |
| 327 |
} |
| 328 |
|
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break; |
| 330 |
} |
| 331 |
prates++; |
| 332 |
} |
| 333 |
|
| 334 |
if (*prates == 0) |
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{ |
| 336 |
perror("SNDCTL_DSP_SPEED"); |
| 337 |
oss_close(); |
| 338 |
return False; |
| 339 |
} |
| 340 |
} |
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|
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/* try to get 12 fragments of 2^12 bytes size */ |
| 343 |
fragments = (12 << 16) + 12; |
| 344 |
ioctl(dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments); |
| 345 |
|
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if (!driver_broken) |
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{ |
| 348 |
audio_buf_info info; |
| 349 |
|
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memset(&info, 0, sizeof(info)); |
| 351 |
if (ioctl(dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1) |
| 352 |
{ |
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perror("SNDCTL_DSP_GETOSPACE"); |
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oss_close(); |
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return False; |
| 356 |
} |
| 357 |
|
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if (info.fragments == 0 || info.fragstotal == 0 || info.fragsize == 0) |
| 359 |
{ |
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fprintf(stderr, |
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"Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n", |
| 362 |
info.fragments, info.fragstotal, info.fragsize); |
| 363 |
driver_broken = True; |
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} |
| 365 |
} |
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|
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dsp_configured = True; |
| 368 |
|
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return True; |
| 370 |
} |
| 371 |
|
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static void |
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oss_volume(uint16 left, uint16 right) |
| 374 |
{ |
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uint32 volume; |
| 376 |
|
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volume = left / (65536 / 100); |
| 378 |
volume |= right / (65536 / 100) << 8; |
| 379 |
|
| 380 |
if (ioctl(dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1) |
| 381 |
{ |
| 382 |
warning("hardware volume control unavailable, falling back to software volume control!\n"); |
| 383 |
oss_driver.wave_out_volume = rdpsnd_dsp_softvol_set; |
| 384 |
rdpsnd_dsp_softvol_set(left, right); |
| 385 |
return; |
| 386 |
} |
| 387 |
} |
| 388 |
|
| 389 |
static void |
| 390 |
oss_play(void) |
| 391 |
{ |
| 392 |
struct audio_packet *packet; |
| 393 |
ssize_t len; |
| 394 |
STREAM out; |
| 395 |
|
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assert(dsp_fd != -1); |
| 397 |
|
| 398 |
/* We shouldn't be called if the queue is empty, but still */ |
| 399 |
if (rdpsnd_queue_empty()) |
| 400 |
return; |
| 401 |
|
| 402 |
packet = rdpsnd_queue_current_packet(); |
| 403 |
out = &packet->s; |
| 404 |
|
| 405 |
len = out->end - out->p; |
| 406 |
|
| 407 |
len = write(dsp_fd, out->p, (len > MAX_LEN) ? MAX_LEN : len); |
| 408 |
if (len == -1) |
| 409 |
{ |
| 410 |
if (errno != EWOULDBLOCK) |
| 411 |
{ |
| 412 |
if (!dsp_broken) |
| 413 |
perror("RDPSND: write()"); |
| 414 |
dsp_broken = True; |
| 415 |
rdpsnd_queue_next(0); |
| 416 |
} |
| 417 |
return; |
| 418 |
} |
| 419 |
|
| 420 |
dsp_broken = False; |
| 421 |
|
| 422 |
out->p += len; |
| 423 |
|
| 424 |
if (out->p == out->end) |
| 425 |
{ |
| 426 |
int delay_bytes; |
| 427 |
unsigned long delay_us; |
| 428 |
audio_buf_info info; |
| 429 |
|
| 430 |
if (in_esddsp) |
| 431 |
{ |
| 432 |
/* EsounD has no way of querying buffer status, so we have to |
| 433 |
* go with a fixed size. */ |
| 434 |
delay_bytes = out->size; |
| 435 |
} |
| 436 |
else |
| 437 |
{ |
| 438 |
#ifdef SNDCTL_DSP_GETODELAY |
| 439 |
delay_bytes = 0; |
| 440 |
if (ioctl(dsp_fd, SNDCTL_DSP_GETODELAY, &delay_bytes) == -1) |
| 441 |
delay_bytes = -1; |
| 442 |
#else |
| 443 |
delay_bytes = -1; |
| 444 |
#endif |
| 445 |
|
| 446 |
if (delay_bytes == -1) |
| 447 |
{ |
| 448 |
if (ioctl(dsp_fd, SNDCTL_DSP_GETOSPACE, &info) != -1) |
| 449 |
delay_bytes = info.fragstotal * info.fragsize - info.bytes; |
| 450 |
else |
| 451 |
delay_bytes = out->size; |
| 452 |
} |
| 453 |
} |
| 454 |
|
| 455 |
delay_us = delay_bytes * (1000000 / (samplewidth * snd_rate)); |
| 456 |
rdpsnd_queue_next(delay_us); |
| 457 |
} |
| 458 |
} |
| 459 |
|
| 460 |
static void |
| 461 |
oss_record(void) |
| 462 |
{ |
| 463 |
char buffer[32768]; |
| 464 |
int len; |
| 465 |
|
| 466 |
assert(dsp_fd != -1); |
| 467 |
|
| 468 |
len = read(dsp_fd, buffer, sizeof(buffer)); |
| 469 |
if (len == -1) |
| 470 |
{ |
| 471 |
if (errno != EWOULDBLOCK) |
| 472 |
{ |
| 473 |
if (!dsp_broken) |
| 474 |
perror("RDPSND: read()"); |
| 475 |
dsp_broken = True; |
| 476 |
rdpsnd_queue_next(0); |
| 477 |
} |
| 478 |
return; |
| 479 |
} |
| 480 |
|
| 481 |
dsp_broken = False; |
| 482 |
|
| 483 |
rdpsnd_record(buffer, len); |
| 484 |
} |
| 485 |
|
| 486 |
struct audio_driver * |
| 487 |
oss_register(char *options) |
| 488 |
{ |
| 489 |
memset(&oss_driver, 0, sizeof(oss_driver)); |
| 490 |
|
| 491 |
oss_driver.name = "oss"; |
| 492 |
oss_driver.description = |
| 493 |
"OSS output driver, default device: " DEFAULTDEVICE " or $AUDIODEV"; |
| 494 |
|
| 495 |
oss_driver.add_fds = oss_add_fds; |
| 496 |
oss_driver.check_fds = oss_check_fds; |
| 497 |
|
| 498 |
oss_driver.wave_out_open = oss_open_out; |
| 499 |
oss_driver.wave_out_close = oss_close_out; |
| 500 |
oss_driver.wave_out_format_supported = oss_format_supported; |
| 501 |
oss_driver.wave_out_set_format = oss_set_format; |
| 502 |
oss_driver.wave_out_volume = oss_volume; |
| 503 |
|
| 504 |
oss_driver.wave_in_open = oss_open_in; |
| 505 |
oss_driver.wave_in_close = oss_close_in; |
| 506 |
oss_driver.wave_in_format_supported = oss_format_supported; |
| 507 |
oss_driver.wave_in_set_format = oss_set_format; |
| 508 |
oss_driver.wave_in_volume = NULL; /* FIXME */ |
| 509 |
|
| 510 |
oss_driver.need_byteswap_on_be = 0; |
| 511 |
oss_driver.need_resampling = 0; |
| 512 |
|
| 513 |
if (options) |
| 514 |
{ |
| 515 |
dsp_dev = xstrdup(options); |
| 516 |
} |
| 517 |
else |
| 518 |
{ |
| 519 |
dsp_dev = getenv("AUDIODEV"); |
| 520 |
|
| 521 |
if (dsp_dev == NULL) |
| 522 |
{ |
| 523 |
dsp_dev = DEFAULTDEVICE; |
| 524 |
} |
| 525 |
} |
| 526 |
|
| 527 |
return &oss_driver; |
| 528 |
} |
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