mirror of
https://github.com/reactos/reactos.git
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23df1a2f4b
svn path=/trunk/; revision=44365
314 lines
6.2 KiB
C
314 lines
6.2 KiB
C
/* -*- c-basic-offset: 8 -*-
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rdesktop: A Remote Desktop Protocol client.
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Sound Channel Process Functions - 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 along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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/audioio.h>
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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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#define MAX_QUEUE 10
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int This->dsp_;
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BOOL This->dsp_bu = False;
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static BOOL g_reopened;
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static BOOL g_swapaudio;
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static short g_samplewidth;
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static struct audio_packet
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{
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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 = getenv("AUDIODEV");
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if (dsp_dev == NULL)
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{
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dsp_dev = xstrdup("/dev/audio");
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}
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if ((This->dsp_ = 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(This->dsp_, F_SETFL, fcntl(This->dsp_, F_GETFL) | O_NONBLOCK);
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queue_lo = queue_hi = 0;
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g_reopened = True;
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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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/* Ack all remaining packets */
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while (queue_lo != queue_hi)
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{
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rdpsnd_send_completion(packet_queue[queue_lo].tick, packet_queue[queue_lo].index);
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free(packet_queue[queue_lo].s.data);
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queue_lo = (queue_lo + 1) % MAX_QUEUE;
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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(This->dsp_, I_FLUSH, FLUSHW);
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#endif
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#if defined AUDIO_FLUSH
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ioctl(This->dsp_, AUDIO_FLUSH, NULL);
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#endif
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close(This->dsp_);
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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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ioctl(This->dsp_, AUDIO_DRAIN, 0);
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g_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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}
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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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/* Do we need to swap the 16bit values? (Are we BigEndian) */
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#ifdef B_ENDIAN
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g_swapaudio = 1;
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#else
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g_swapaudio = 0;
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#endif
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}
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g_samplewidth = pwfx->wBitsPerSample / 8;
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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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g_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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g_reopened = True;
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if (ioctl(This->dsp_, AUDIO_SETINFO, &info) == -1)
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{
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perror("AUDIO_SETINFO");
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close(This->dsp_);
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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_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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AUDIO_INITINFO(&info);
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volume = (left > right) ? left : right;
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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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info.play.gain = volume / (65536 / AUDIO_MAX_GAIN);
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info.play.balance = balance;
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if (ioctl(This->dsp_, 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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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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packet->s.p += 4;
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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 (!This->dsp_bu)
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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 uint32 samplecnt = 0;
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static uint32 numsamples;
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while (1)
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{
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if (g_reopened)
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{
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/* Device was just (re)openend */
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samplecnt = 0;
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swapped = False;
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sentcompletion = True;
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g_reopened = False;
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}
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if (queue_lo == queue_hi)
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{
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This->dsp_bu = 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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/* Swap the current packet, but only once */
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if (g_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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}
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swapped = True;
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}
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if (sentcompletion)
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{
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sentcompletion = False;
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numsamples = (out->end - out->p) / g_samplewidth;
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}
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len = 0;
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if (out->end != out->p)
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{
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len = write(This->dsp_, 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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This->dsp_bu = 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(This->dsp_, 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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/* Ack the packet, if we have played at least 70% */
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if (info.play.samples >= samplecnt + ((numsamples * 7) / 10))
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{
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samplecnt += numsamples;
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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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This->dsp_bu = 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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