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/* -*- c-basic-offset: 8 -*- |
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rdesktop: A Remote Desktop Protocol client. |
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Sound Channel Process Functions - Sun |
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Copyright (C) Matthew Chapman 2003-2007 |
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Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003 |
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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 |
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the Free Software Foundation; either version 2 of the License, or |
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(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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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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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 (!sun_open(O_RDONLY)) |
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return False; |
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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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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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if (pwfx->wBitsPerSample == 8) |
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{ |
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info.play.encoding = AUDIO_ENCODING_LINEAR8; |
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} |
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else if (pwfx->wBitsPerSample == 16) |
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{ |
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info.play.encoding = AUDIO_ENCODING_LINEAR; |
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} |
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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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} |
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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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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.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; |
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} |
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|
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dsp_configured = 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_volume(uint16 left, uint16 right) |
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{ |
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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; |
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|
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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)); |
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} |
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else |
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{ |
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balance = AUDIO_MID_BALANCE; |
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} |
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|
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info.play.gain = volume / (65536 / AUDIO_MAX_GAIN); |
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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"); |
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return; |
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} |
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} |
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|
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void |
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sun_play(void) |
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{ |
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struct audio_packet *packet; |
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ssize_t len; |
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STREAM out; |
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|
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/* We shouldn't be called if the queue is empty, but still */ |
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if (rdpsnd_queue_empty()) |
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return; |
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|
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packet = rdpsnd_queue_current_packet(); |
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out = &packet->s; |
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|
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len = out->end - out->p; |
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|
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len = write(dsp_fd, out->p, (len > MAX_LEN) ? MAX_LEN : len); |
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if (len == -1) |
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{ |
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if (errno != EWOULDBLOCK) |
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{ |
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if (!dsp_broken) |
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perror("RDPSND: write()"); |
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dsp_broken = True; |
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rdpsnd_queue_next(0); |
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} |
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return; |
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} |
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|
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written_samples += len / (samplewidth * (stereo ? 2 : 1)); |
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|
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dsp_broken = False; |
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|
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out->p += len; |
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|
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if (out->p == out->end) |
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{ |
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audio_info_t info; |
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uint_t delay_samples; |
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unsigned long delay_us; |
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|
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if (ioctl(dsp_fd, AUDIO_GETINFO, &info) != -1) |
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delay_samples = written_samples - info.play.samples; |
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else |
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delay_samples = out->size / (samplewidth * (stereo ? 2 : 1)); |
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|
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delay_us = delay_samples * (1000000 / snd_rate); |
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rdpsnd_queue_next(delay_us); |
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} |
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} |
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|
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void |
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sun_record(void) |
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{ |
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char buffer[32768]; |
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int len; |
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|
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len = read(dsp_fd, buffer, sizeof(buffer)); |
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if (len == -1) |
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{ |
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if (errno != EWOULDBLOCK) |
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perror("read audio"); |
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return; |
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} |
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|
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rdpsnd_record(buffer, len); |
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} |
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|
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struct audio_driver * |
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sun_register(char *options) |
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{ |
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static struct audio_driver sun_driver; |
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|
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memset(&sun_driver, 0, sizeof(sun_driver)); |
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|
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sun_driver.name = "sun"; |
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sun_driver.description = |
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"SUN/BSD output driver, default device: " DEFAULTDEVICE " or $AUDIODEV"; |
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|
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sun_driver.add_fds = sun_add_fds; |
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sun_driver.check_fds = sun_check_fds; |
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|
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sun_driver.wave_out_open = sun_open_out; |
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sun_driver.wave_out_close = sun_close_out; |
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sun_driver.wave_out_format_supported = sun_format_supported; |
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sun_driver.wave_out_set_format = sun_set_format; |
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sun_driver.wave_out_volume = sun_volume; |
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|
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sun_driver.wave_in_open = sun_open_in; |
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sun_driver.wave_in_close = sun_close_in; |
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sun_driver.wave_in_format_supported = sun_format_supported; |
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sun_driver.wave_in_set_format = sun_set_format; |
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sun_driver.wave_in_volume = NULL; /* FIXME */ |
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|
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sun_driver.need_byteswap_on_be = 1; |
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sun_driver.need_resampling = 0; |
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|
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if (options) |
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{ |
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dsp_dev = xstrdup(options); |
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} |
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else |
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{ |
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dsp_dev = getenv("AUDIODEV"); |
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|
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if (dsp_dev == NULL) |
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{ |
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dsp_dev = DEFAULTDEVICE; |
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} |
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} |
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|
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return &sun_driver; |
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} |
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