e82b81576b
dynamically. this will be needed for the OSS driver. git-svn-id: svn://svn.code.sf.net/p/rdesktop/code/trunk/rdesktop@1278 423420c4-83ab-492f-b58f-81f9feb106b5
272 lines
5.7 KiB
C
272 lines
5.7 KiB
C
/* -*- c-basic-offset: 8 -*-
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rdesktop: A Remote Desktop Protocol client.
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Sound Channel Process Functions - Open Sound System
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Copyright (C) Matthew Chapman 2003
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Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
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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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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, 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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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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#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 <sys/time.h>
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#include <sys/ioctl.h>
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#include <sys/soundcard.h>
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#define DEFAULTDEVICE "/dev/dsp"
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#define MAX_LEN 512
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static int snd_rate;
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static short samplewidth;
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static char *dsp_dev;
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static struct audio_driver oss_driver;
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BOOL
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oss_open(void)
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{
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if ((g_dsp_fd = open(dsp_dev, O_WRONLY)) == -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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return True;
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}
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void
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oss_close(void)
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{
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close(g_dsp_fd);
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}
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BOOL
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oss_format_supported(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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BOOL
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oss_set_format(WAVEFORMATEX * pwfx)
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{
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int stereo, format, fragments;
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static BOOL driver_broken = False;
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ioctl(g_dsp_fd, SNDCTL_DSP_RESET, NULL);
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ioctl(g_dsp_fd, SNDCTL_DSP_SYNC, NULL);
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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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samplewidth = pwfx->wBitsPerSample / 8;
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if (ioctl(g_dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1)
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{
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perror("SNDCTL_DSP_SETFMT");
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close(g_dsp_fd);
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return False;
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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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if (ioctl(g_dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1)
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{
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perror("SNDCTL_DSP_CHANNELS");
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close(g_dsp_fd);
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return False;
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}
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snd_rate = pwfx->nSamplesPerSec;
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if (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, &snd_rate) == -1)
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{
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perror("SNDCTL_DSP_SPEED");
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close(g_dsp_fd);
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return False;
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}
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/* try to get 12 fragments of 2^12 bytes size */
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fragments = (12 << 16) + 12;
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ioctl(g_dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments);
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if (!driver_broken)
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{
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audio_buf_info info;
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memset(&info, 0, sizeof(info));
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if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
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{
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perror("SNDCTL_DSP_GETOSPACE");
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close(g_dsp_fd);
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return False;
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}
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if (info.fragments == 0 || info.fragstotal == 0 || info.fragsize == 0)
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{
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fprintf(stderr,
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"Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n",
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info.fragments, info.fragstotal, info.fragsize);
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driver_broken = True;
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}
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}
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return True;
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}
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void
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oss_volume(uint16 left, uint16 right)
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{
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uint32 volume;
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volume = left / (65536 / 100);
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volume |= right / (65536 / 100) << 8;
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if (ioctl(g_dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
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{
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warning("hardware volume control unavailable, falling back to software volume control!\n");
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oss_driver.wave_out_volume = rdpsnd_dsp_softvol_set;
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rdpsnd_dsp_softvol_set(left, right);
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return;
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}
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}
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void
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oss_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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static long startedat_us;
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static long startedat_s;
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static BOOL started = False;
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struct timeval tv;
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if (rdpsnd_queue_empty())
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{
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g_dsp_busy = 0;
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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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if (!started)
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{
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gettimeofday(&tv, NULL);
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startedat_us = tv.tv_usec;
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startedat_s = tv.tv_sec;
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started = True;
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}
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len = out->end - out->p;
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len = write(g_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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perror("write audio");
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g_dsp_busy = 1;
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return;
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}
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out->p += len;
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if (out->p == out->end)
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{
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long long duration;
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long elapsed;
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gettimeofday(&tv, NULL);
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duration = (out->size * (1000000 / (samplewidth * snd_rate)));
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elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us);
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if (elapsed >= (duration * 85) / 100)
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{
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/* We need to add 50 to tell windows that time has passed while
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* playing this packet */
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rdpsnd_send_completion(packet->tick + 50, packet->index);
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rdpsnd_queue_next();
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started = False;
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}
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else
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{
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g_dsp_busy = 1;
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return;
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}
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}
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g_dsp_busy = 1;
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return;
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}
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struct audio_driver *
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oss_register(char *options)
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{
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oss_driver.wave_out_write = rdpsnd_queue_write;
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oss_driver.wave_out_open = oss_open;
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oss_driver.wave_out_close = oss_close;
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oss_driver.wave_out_format_supported = oss_format_supported;
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oss_driver.wave_out_set_format = oss_set_format;
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oss_driver.wave_out_volume = oss_volume;
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oss_driver.wave_out_play = oss_play;
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oss_driver.name = xstrdup("oss");
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oss_driver.description =
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xstrdup("OSS output driver, default device: " DEFAULTDEVICE " or $AUDIODEV");
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oss_driver.need_byteswap_on_be = 0;
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oss_driver.need_resampling = 0;
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oss_driver.next = NULL;
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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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if (dsp_dev == NULL)
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{
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dsp_dev = xstrdup(DEFAULTDEVICE);
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}
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}
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return &oss_driver;
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}
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