243 lines
4.8 KiB
C
243 lines
4.8 KiB
C
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/*
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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
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Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
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Copyright (C) Michael Gernoth mike@zerfleddert.de 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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#include "rdesktop.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/audio.h>
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#include <stropts.h>
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#define MAX_QUEUE 10
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int g_dsp_fd;
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BOOL g_dsp_busy;
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static BOOL swapaudio;
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static short samplewidth;
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static struct audio_packet {
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struct stream s;
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uint16 tick;
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uint8 index;
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} packet_queue[MAX_QUEUE];
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static unsigned int queue_hi, queue_lo;
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BOOL
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wave_out_open(void)
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{
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char *dsp_dev = "/dev/audio";
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if ((g_dsp_fd = open(dsp_dev, O_WRONLY|O_NONBLOCK)) == -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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/* Non-blocking so that user interface is responsive */
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fcntl(g_dsp_fd, F_SETFL, fcntl(g_dsp_fd, F_GETFL)|O_NONBLOCK);
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queue_lo = queue_hi = 0;
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return True;
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}
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void
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wave_out_close(void)
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{
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ioctl(g_dsp_fd,I_FLUSH,FLUSHW);
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close(g_dsp_fd);
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}
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BOOL
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wave_out_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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wave_out_set_format(WAVEFORMATEX *pwfx)
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{
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audio_info_t info;
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int test = 1;
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ioctl(g_dsp_fd, AUDIO_DRAIN, 0);
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swapaudio = False;
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AUDIO_INITINFO(&info);
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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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samplewidth=1;
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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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swapaudio = !(*(uint8 *) (&test));
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samplewidth=2;
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}
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if (pwfx->nChannels == 1 )
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{
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info.play.channels = AUDIO_CHANNELS_MONO;
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}
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else if (pwfx->nChannels == 2 )
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{
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info.play.channels = AUDIO_CHANNELS_STEREO;
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samplewidth*=2;
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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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if (ioctl(g_dsp_fd, AUDIO_SETINFO, &info) == -1)
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{
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perror("AUDIO_SETINFO");
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close(g_dsp_fd);
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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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wave_out_write(STREAM s, uint16 tick, uint8 index)
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{
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struct audio_packet *packet = &packet_queue[queue_hi];
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unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;
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if (next_hi == queue_lo)
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{
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error("No space to queue audio packet\n");
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return;
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}
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queue_hi = next_hi;
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packet->s = *s;
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packet->tick = tick;
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packet->index = index;
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/* we steal the data buffer from s, give it a new one */
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s->data = malloc(s->size);
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if (!g_dsp_busy)
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wave_out_play();
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}
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void
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wave_out_play(void)
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{
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struct audio_packet *packet;
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audio_info_t info;
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ssize_t len;
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unsigned int i;
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uint8 swap;
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STREAM out;
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static BOOL swapped = False;
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static BOOL sentcompletion = True;
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static int samplecnt;
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static int numsamples;
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while (1)
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{
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if (queue_lo == queue_hi)
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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 = &packet_queue[queue_lo];
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out = &packet->s;
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if ( swapaudio && ! swapped )
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{
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for ( i = 0; i < out->end - out->p; i+=2 )
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{
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swap = *(out->p + i);
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*(out->p + i ) = *(out->p + i + 1);
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*(out->p + i + 1) = swap;
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swapped = True;
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}
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}
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if ( sentcompletion )
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{
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if (ioctl(g_dsp_fd, AUDIO_GETINFO, &info) == -1)
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{
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perror("AUDIO_GETINFO");
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return;
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}
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samplecnt=info.play.samples;
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sentcompletion = False;
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numsamples = (out->end-out->p)/samplewidth;
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}
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len=0;
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if ( out->end - out->p != 0 )
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{
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len = write(g_dsp_fd, out->p, out->end - out->p);
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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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}
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out->p += len;
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if (out->p == out->end)
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{
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if (ioctl(g_dsp_fd, AUDIO_GETINFO, &info) == -1)
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{
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perror("AUDIO_GETINFO");
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return;
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}
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if ( info.play.samples >= samplecnt+(numsamples)*0.9 )
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{
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rdpsnd_send_completion(packet->tick, packet->index);
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free(out->data);
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queue_lo = (queue_lo + 1) % MAX_QUEUE;
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swapped = False;
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sentcompletion = True;
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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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}
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}
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