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/* -*- c-basic-offset: 8 -*- |
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rdesktop: A Remote Desktop Protocol client. |
| 3 |
Sound Channel Process Functions - Sun |
| 4 |
Copyright (C) Matthew Chapman 2003-2007 |
| 5 |
Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003 |
| 6 |
Copyright (C) Michael Gernoth mike@zerfleddert.de 2003-2007 |
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Copyright 2007 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 |
| 11 |
the Free Software Foundation; either version 2 of the License, or |
| 12 |
(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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#include "rdesktop.h" |
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#include "rdpsnd.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 <sys/ioctl.h> |
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#include <sys/audioio.h> |
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|
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#if (defined(sun) && (defined(__svr4__) || defined(__SVR4))) |
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#include <stropts.h> |
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#endif |
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|
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#define DEFAULTDEVICE "/dev/audio" |
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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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static int dsp_refs; |
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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 RD_BOOL dsp_out; |
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static RD_BOOL dsp_in; |
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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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|
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static uint_t written_samples; |
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|
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void sun_play(void); |
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void sun_record(void); |
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|
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static int |
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sun_pause(void) |
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{ |
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audio_info_t info; |
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|
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AUDIO_INITINFO(&info); |
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|
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info.record.pause = 1; |
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|
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if (ioctl(dsp_fd, AUDIO_SETINFO, &info) == -1) |
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return -1; |
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|
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#if defined I_FLUSH && defined FLUSHR |
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if (ioctl(dsp_fd, I_FLUSH, FLUSHR) == -1) |
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return -1; |
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#endif |
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|
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return 0; |
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} |
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|
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static int |
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sun_resume(void) |
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{ |
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audio_info_t info; |
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|
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AUDIO_INITINFO(&info); |
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|
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info.record.pause = 0; |
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|
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if (ioctl(dsp_fd, AUDIO_SETINFO, &info) == -1) |
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return -1; |
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|
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return 0; |
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} |
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|
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void |
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sun_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_out && !rdpsnd_queue_empty()) |
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FD_SET(dsp_fd, wfds); |
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if (dsp_in) |
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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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void |
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sun_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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sun_play(); |
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if (FD_ISSET(dsp_fd, rfds)) |
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sun_record(); |
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} |
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|
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RD_BOOL |
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sun_open(int mode) |
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{ |
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audio_info_t info; |
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|
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if (dsp_fd != -1) |
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{ |
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dsp_refs++; |
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|
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if (dsp_mode == O_RDWR) |
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return True; |
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|
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if (dsp_mode == mode) |
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return True; |
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|
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dsp_refs--; |
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return False; |
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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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written_samples = 0; |
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|
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dsp_mode = O_RDWR; |
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dsp_fd = open(dsp_dev, O_RDWR | O_NONBLOCK); |
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if (dsp_fd != -1) |
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{ |
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AUDIO_INITINFO(&info); |
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|
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if ((ioctl(dsp_fd, AUDIO_GETINFO, &info) == -1) |
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|| !(info.hw_features & AUDIO_HWFEATURE_DUPLEX)) |
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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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|
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if (dsp_fd == -1) |
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{ |
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dsp_mode = mode; |
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|
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dsp_fd = open(dsp_dev, dsp_mode | O_NONBLOCK); |
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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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|
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/* |
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* Pause recording until we actually start using it. |
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*/ |
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if (dsp_mode != O_WRONLY) |
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{ |
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if (sun_pause() == -1) |
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{ |
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close(dsp_fd); |
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dsp_fd = -1; |
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return False; |
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} |
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} |
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|
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dsp_refs++; |
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|
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return True; |
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} |
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|
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void |
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sun_close(void) |
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{ |
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dsp_refs--; |
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|
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if (dsp_refs != 0) |
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return; |
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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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RD_BOOL |
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sun_open_out(void) |
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{ |
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if (!sun_open(O_WRONLY)) |
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return False; |
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|
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dsp_out = True; |
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|
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return True; |
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} |
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|
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void |
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sun_close_out(void) |
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{ |
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#if defined I_FLUSH && defined FLUSHW |
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/* Flush the audiobuffer */ |
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ioctl(dsp_fd, I_FLUSH, FLUSHW); |
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#endif |
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#if defined AUDIO_FLUSH |
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ioctl(dsp_fd, AUDIO_FLUSH, NULL); |
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#endif |
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|
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sun_close(); |
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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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dsp_out = False; |
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} |
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|
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RD_BOOL |
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sun_open_in(void) |
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{ |
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#if ! (defined I_FLUSH && defined FLUSHR) |
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/* |
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* It is not possible to reliably use the recording without |
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* flush operations. |
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*/ |
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return False; |
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#endif |
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|
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if (!sun_open(O_RDONLY)) |
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return False; |
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|
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/* |
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* Unpause the stream now that we have someone using it. |
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*/ |
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if (sun_resume() == -1) |
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{ |
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sun_close(); |
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return False; |
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} |
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|
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dsp_in = True; |
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|
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return True; |
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} |
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|
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void |
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sun_close_in(void) |
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{ |
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/* |
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* Repause the stream when the user goes away. |
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*/ |
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sun_pause(); |
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|
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sun_close(); |
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|
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dsp_in = False; |
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} |
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|
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RD_BOOL |
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sun_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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RD_BOOL |
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sun_set_format(RD_WAVEFORMATEX * pwfx) |
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{ |
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audio_info_t info; |
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|
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ioctl(dsp_fd, AUDIO_DRAIN, 0); |
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AUDIO_INITINFO(&info); |
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|
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if (dsp_configured) |
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{ |
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if ((pwfx->wBitsPerSample == 8) && (format != AUDIO_ENCODING_LINEAR8)) |
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return False; |
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if ((pwfx->wBitsPerSample == 16) && (format != AUDIO_ENCODING_LINEAR)) |
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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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sun_pause(); |
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|
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if (pwfx->wBitsPerSample == 8) |
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format = AUDIO_ENCODING_LINEAR8; |
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else if (pwfx->wBitsPerSample == 16) |
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format = AUDIO_ENCODING_LINEAR; |
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|
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samplewidth = pwfx->wBitsPerSample / 8; |
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|
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if (pwfx->nChannels == 1) |
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{ |
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info.play.channels = 1; |
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stereo = 0; |
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} |
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else if (pwfx->nChannels == 2) |
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{ |
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info.play.channels = 2; |
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stereo = 1; |
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samplewidth *= 2; |
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} |
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|
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snd_rate = pwfx->nSamplesPerSec; |
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|
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info.play.sample_rate = pwfx->nSamplesPerSec; |
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info.play.precision = pwfx->wBitsPerSample; |
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info.play.encoding = format; |
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info.play.samples = 0; |
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info.play.eof = 0; |
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info.play.error = 0; |
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|
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info.record.sample_rate = info.play.sample_rate; |
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info.record.channels = info.play.channels; |
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info.record.precision = info.play.precision; |
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info.record.encoding = info.play.encoding; |
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info.record.samples = 0; |
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info.record.error = 0; |
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|
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if (ioctl(dsp_fd, AUDIO_SETINFO, &info) == -1) |
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{ |
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perror("AUDIO_SETINFO"); |
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sun_close(); |
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return False; |
| 349 |
} |
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|
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dsp_configured = True; |
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|
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if (dsp_in) |
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sun_resume(); |
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|
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return True; |
| 357 |
} |
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|
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void |
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sun_volume(uint16 left, uint16 right) |
| 361 |
{ |
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audio_info_t info; |
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uint balance; |
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uint volume; |
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|
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AUDIO_INITINFO(&info); |
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|
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volume = (left > right) ? left : right; |
| 369 |
|
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if (volume / AUDIO_MID_BALANCE != 0) |
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{ |
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balance = |
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AUDIO_MID_BALANCE - (left / (volume / AUDIO_MID_BALANCE)) + |
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(right / (volume / AUDIO_MID_BALANCE)); |
| 375 |
} |
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else |
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{ |
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balance = AUDIO_MID_BALANCE; |
| 379 |
} |
| 380 |
|
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info.play.gain = volume / (65536 / AUDIO_MAX_GAIN); |
| 382 |
info.play.balance = balance; |
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|
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if (ioctl(dsp_fd, AUDIO_SETINFO, &info) == -1) |
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{ |
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perror("AUDIO_SETINFO"); |
| 387 |
return; |
| 388 |
} |
| 389 |
} |
| 390 |
|
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void |
| 392 |
sun_play(void) |
| 393 |
{ |
| 394 |
struct audio_packet *packet; |
| 395 |
ssize_t len; |
| 396 |
STREAM out; |
| 397 |
|
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/* We shouldn't be called if the queue is empty, but still */ |
| 399 |
if (rdpsnd_queue_empty()) |
| 400 |
return; |
| 401 |
|
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packet = rdpsnd_queue_current_packet(); |
| 403 |
out = &packet->s; |
| 404 |
|
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len = out->end - out->p; |
| 406 |
|
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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 |
written_samples += len / (samplewidth * (stereo ? 2 : 1)); |
| 421 |
|
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dsp_broken = False; |
| 423 |
|
| 424 |
out->p += len; |
| 425 |
|
| 426 |
if (out->p == out->end) |
| 427 |
{ |
| 428 |
audio_info_t info; |
| 429 |
uint_t delay_samples; |
| 430 |
unsigned long delay_us; |
| 431 |
|
| 432 |
if (ioctl(dsp_fd, AUDIO_GETINFO, &info) != -1) |
| 433 |
delay_samples = written_samples - info.play.samples; |
| 434 |
else |
| 435 |
delay_samples = out->size / (samplewidth * (stereo ? 2 : 1)); |
| 436 |
|
| 437 |
delay_us = delay_samples * (1000000 / snd_rate); |
| 438 |
rdpsnd_queue_next(delay_us); |
| 439 |
} |
| 440 |
} |
| 441 |
|
| 442 |
void |
| 443 |
sun_record(void) |
| 444 |
{ |
| 445 |
char buffer[32768]; |
| 446 |
int len; |
| 447 |
|
| 448 |
len = read(dsp_fd, buffer, sizeof(buffer)); |
| 449 |
if (len == -1) |
| 450 |
{ |
| 451 |
if (errno != EWOULDBLOCK) |
| 452 |
perror("read audio"); |
| 453 |
return; |
| 454 |
} |
| 455 |
|
| 456 |
rdpsnd_record(buffer, len); |
| 457 |
} |
| 458 |
|
| 459 |
struct audio_driver * |
| 460 |
sun_register(char *options) |
| 461 |
{ |
| 462 |
static struct audio_driver sun_driver; |
| 463 |
|
| 464 |
memset(&sun_driver, 0, sizeof(sun_driver)); |
| 465 |
|
| 466 |
sun_driver.name = "sun"; |
| 467 |
sun_driver.description = |
| 468 |
"SUN/BSD output driver, default device: " DEFAULTDEVICE " or $AUDIODEV"; |
| 469 |
|
| 470 |
sun_driver.add_fds = sun_add_fds; |
| 471 |
sun_driver.check_fds = sun_check_fds; |
| 472 |
|
| 473 |
sun_driver.wave_out_open = sun_open_out; |
| 474 |
sun_driver.wave_out_close = sun_close_out; |
| 475 |
sun_driver.wave_out_format_supported = sun_format_supported; |
| 476 |
sun_driver.wave_out_set_format = sun_set_format; |
| 477 |
sun_driver.wave_out_volume = sun_volume; |
| 478 |
|
| 479 |
sun_driver.wave_in_open = sun_open_in; |
| 480 |
sun_driver.wave_in_close = sun_close_in; |
| 481 |
sun_driver.wave_in_format_supported = sun_format_supported; |
| 482 |
sun_driver.wave_in_set_format = sun_set_format; |
| 483 |
sun_driver.wave_in_volume = NULL; /* FIXME */ |
| 484 |
|
| 485 |
sun_driver.need_byteswap_on_be = 1; |
| 486 |
sun_driver.need_resampling = 0; |
| 487 |
|
| 488 |
if (options) |
| 489 |
{ |
| 490 |
dsp_dev = xstrdup(options); |
| 491 |
} |
| 492 |
else |
| 493 |
{ |
| 494 |
dsp_dev = getenv("AUDIODEV"); |
| 495 |
|
| 496 |
if (dsp_dev == NULL) |
| 497 |
{ |
| 498 |
dsp_dev = DEFAULTDEVICE; |
| 499 |
} |
| 500 |
} |
| 501 |
|
| 502 |
return &sun_driver; |
| 503 |
} |
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