281d7c9f06
git-svn-id: svn://svn.code.sf.net/p/rdesktop/code/rdesktop/trunk@1534 423420c4-83ab-492f-b58f-81f9feb106b5
320 lines
7.2 KiB
C
320 lines
7.2 KiB
C
/* -*- c-basic-offset: 8 -*-
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rdesktop: A Remote Desktop Protocol client.
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Sound Channel Process Functions - SGI/IRIX
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Copyright (C) Matthew Chapman 2003-2008
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Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
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Copyright (C) Jeremy Meng void.foo@gmail.com 2004, 2005
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "rdesktop.h"
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#include <errno.h>
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#include <dmedia/audio.h>
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/* #define IRIX_DEBUG 1 */
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#define IRIX_MAX_VOL 65535
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ALconfig audioconfig;
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ALport output_port;
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static int g_snd_rate;
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static int width = AL_SAMPLE_16;
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static char *sgi_output_device = NULL;
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double min_volume, max_volume, volume_range;
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int resource, maxFillable;
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int combinedFrameSize;
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void sgi_play(void);
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void
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sgi_add_fds(int *n, fd_set * rfds, fd_set * wfds, struct timeval *tv)
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{
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/* We need to be called rather often... */
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if (output_port != (ALport) 0 && !rdpsnd_queue_empty())
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FD_SET(0, wfds);
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}
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void
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sgi_check_fds(fd_set * rfds, fd_set * wfds)
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{
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if (output_port == (ALport) 0)
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return;
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if (!rdpsnd_queue_empty())
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sgi_play();
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}
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RD_BOOL
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sgi_open(void)
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{
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ALparamInfo pinfo;
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static int warned = 0;
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#if (defined(IRIX_DEBUG))
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fprintf(stderr, "sgi_open: begin\n");
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#endif
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if (!warned && sgi_output_device)
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{
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warning("device-options not supported for libao-driver\n");
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warned = 1;
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}
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if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0)
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{
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fprintf(stderr, "sgi_open: alGetParamInfo failed: %s\n",
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alGetErrorString(oserror()));
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}
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min_volume = alFixedToDouble(pinfo.min.ll);
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max_volume = alFixedToDouble(pinfo.max.ll);
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volume_range = (max_volume - min_volume);
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#if (defined(IRIX_DEBUG))
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fprintf(stderr, "sgi_open: minvol = %lf, maxvol= %lf, range = %lf.\n",
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min_volume, max_volume, volume_range);
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#endif
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audioconfig = alNewConfig();
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if (audioconfig == (ALconfig) 0)
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{
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fprintf(stderr, "sgi_open: alNewConfig failed: %s\n", alGetErrorString(oserror()));
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return False;
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}
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output_port = alOpenPort("rdpsnd", "w", 0);
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if (output_port == (ALport) 0)
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{
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fprintf(stderr, "sgi_open: alOpenPort failed: %s\n", alGetErrorString(oserror()));
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return False;
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}
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#if (defined(IRIX_DEBUG))
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fprintf(stderr, "sgi_open: returning\n");
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#endif
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return True;
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}
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void
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sgi_close(void)
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{
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/* Ack all remaining packets */
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#if (defined(IRIX_DEBUG))
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fprintf(stderr, "sgi_close: begin\n");
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#endif
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while (!rdpsnd_queue_empty())
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rdpsnd_queue_next(0);
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alDiscardFrames(output_port, 0);
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alClosePort(output_port);
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output_port = (ALport) 0;
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alFreeConfig(audioconfig);
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#if (defined(IRIX_DEBUG))
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fprintf(stderr, "sgi_close: returning\n");
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#endif
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}
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RD_BOOL
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sgi_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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return True;
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}
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RD_BOOL
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sgi_set_format(RD_WAVEFORMATEX * pwfx)
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{
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int channels;
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int frameSize, channelCount;
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ALpv params;
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#if (defined(IRIX_DEBUG))
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fprintf(stderr, "sgi_set_format: init...\n");
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#endif
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if (pwfx->wBitsPerSample == 8)
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width = AL_SAMPLE_8;
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else if (pwfx->wBitsPerSample == 16)
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width = AL_SAMPLE_16;
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/* Limited support to configure an opened audio port in IRIX. The
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number of channels is a static setting and can not be changed after
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a port is opened. So if the number of channels remains the same, we
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can configure other settings; otherwise we have to reopen the audio
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port, using same config. */
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channels = pwfx->nChannels;
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g_snd_rate = pwfx->nSamplesPerSec;
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alSetSampFmt(audioconfig, AL_SAMPFMT_TWOSCOMP);
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alSetWidth(audioconfig, width);
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if (channels != alGetChannels(audioconfig))
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{
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alClosePort(output_port);
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alSetChannels(audioconfig, channels);
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output_port = alOpenPort("rdpsnd", "w", audioconfig);
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if (output_port == (ALport) 0)
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{
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fprintf(stderr, "sgi_set_format: alOpenPort failed: %s\n",
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alGetErrorString(oserror()));
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return False;
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}
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}
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resource = alGetResource(output_port);
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maxFillable = alGetFillable(output_port);
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channelCount = alGetChannels(audioconfig);
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frameSize = alGetWidth(audioconfig);
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if (frameSize == 0 || channelCount == 0)
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{
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fprintf(stderr, "sgi_set_format: bad frameSize or channelCount\n");
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return False;
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}
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combinedFrameSize = frameSize * channelCount;
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params.param = AL_RATE;
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params.value.ll = (long long) g_snd_rate << 32;
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if (alSetParams(resource, ¶ms, 1) < 0)
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{
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fprintf(stderr, "wave_set_format: alSetParams failed: %s\n",
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alGetErrorString(oserror()));
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return False;
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}
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if (params.sizeOut < 0)
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{
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fprintf(stderr, "wave_set_format: invalid rate %d\n", g_snd_rate);
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return False;
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}
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#if (defined(IRIX_DEBUG))
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fprintf(stderr, "sgi_set_format: returning...\n");
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#endif
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return True;
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}
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void
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sgi_volume(uint16 left, uint16 right)
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{
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double gainleft, gainright;
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ALpv pv[1];
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ALfixed gain[8];
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#if (defined(IRIX_DEBUG))
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fprintf(stderr, "sgi_volume: begin\n");
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fprintf(stderr, "left='%d', right='%d'\n", left, right);
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#endif
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gainleft = (double) left / IRIX_MAX_VOL;
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gainright = (double) right / IRIX_MAX_VOL;
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gain[0] = alDoubleToFixed(min_volume + gainleft * volume_range);
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gain[1] = alDoubleToFixed(min_volume + gainright * volume_range);
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pv[0].param = AL_GAIN;
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pv[0].value.ptr = gain;
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pv[0].sizeIn = 8;
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if (alSetParams(AL_DEFAULT_OUTPUT, pv, 1) < 0)
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{
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fprintf(stderr, "sgi_volume: alSetParams failed: %s\n",
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alGetErrorString(oserror()));
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return;
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}
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#if (defined(IRIX_DEBUG))
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fprintf(stderr, "sgi_volume: returning\n");
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#endif
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}
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void
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sgi_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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unsigned int i;
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STREAM out;
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int gf;
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while (1)
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{
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if (rdpsnd_queue_empty())
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return;
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packet = rdpsnd_queue_current_packet();
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out = &packet->s;
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len = out->end - out->p;
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alWriteFrames(output_port, out->p, len / combinedFrameSize);
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out->p += len;
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if (out->p == out->end)
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{
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gf = alGetFilled(output_port);
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if (gf < (4 * maxFillable / 10))
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{
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rdpsnd_queue_next(0);
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}
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else
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{
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#if (defined(IRIX_DEBUG))
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/* fprintf(stderr,"Busy playing...\n"); */
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#endif
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usleep(10);
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return;
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}
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}
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}
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}
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struct audio_driver *
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sgi_register(char *options)
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{
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static struct audio_driver sgi_driver;
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memset(&sgi_driver, 0, sizeof(sgi_driver));
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sgi_driver.name = "sgi";
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sgi_driver.description = "SGI output driver";
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sgi_driver.add_fds = sgi_add_fds;
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sgi_driver.check_fds = sgi_check_fds;
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sgi_driver.wave_out_open = sgi_open;
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sgi_driver.wave_out_close = sgi_close;
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sgi_driver.wave_out_format_supported = sgi_format_supported;
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sgi_driver.wave_out_set_format = sgi_set_format;
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sgi_driver.wave_out_volume = sgi_volume;
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sgi_driver.need_byteswap_on_be = 1;
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sgi_driver.need_resampling = 0;
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if (options)
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{
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sgi_output_device = xstrdup(options);
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}
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return &sgi_driver;
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}
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