trunk/rdesktop/rdpsnd_sun.c

/* 
   rdesktop: A Remote Desktop Protocol client.
   Sound Channel Process Functions - Sun
   Copyright (C) Matthew Chapman 2003
   Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
   Copyright (C) Michael Gernoth mike@zerfleddert.de 2003

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "rdesktop.h"
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/audio.h>
#include <stropts.h>

#define MAX_QUEUE       10

int g_dsp_fd;
BOOL g_dsp_busy;
static BOOL swapaudio;
static short samplewidth;

static struct audio_packet {
        struct stream s;
        uint16 tick;
        uint8 index;
} packet_queue[MAX_QUEUE];
static unsigned int queue_hi, queue_lo;

BOOL
wave_out_open(void)
{
        char *dsp_dev = "/dev/audio";

        if ((g_dsp_fd = open(dsp_dev, O_WRONLY|O_NONBLOCK)) == -1)
        {
                perror(dsp_dev);
                return False;
        }


        /* Non-blocking so that user interface is responsive */
        fcntl(g_dsp_fd, F_SETFL, fcntl(g_dsp_fd, F_GETFL)|O_NONBLOCK);
        queue_lo = queue_hi = 0;
        return True;
}

void
wave_out_close(void)
{
        ioctl(g_dsp_fd,I_FLUSH,FLUSHW);
        close(g_dsp_fd);
}

BOOL
wave_out_format_supported(WAVEFORMATEX *pwfx)
{
        if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
                return False;
        if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
                return False;
        if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
                return False;

        return True;
}

BOOL
wave_out_set_format(WAVEFORMATEX *pwfx)
{
        audio_info_t info;
        int test = 1;

        ioctl(g_dsp_fd, AUDIO_DRAIN, 0);
        swapaudio = False;
        AUDIO_INITINFO(&info);


        if (pwfx->wBitsPerSample == 8)
        {
                info.play.encoding = AUDIO_ENCODING_LINEAR8;
                samplewidth=1;
        }
        else if (pwfx->wBitsPerSample == 16)
        {
                info.play.encoding = AUDIO_ENCODING_LINEAR;
                swapaudio = !(*(uint8 *) (&test));
                samplewidth=2;
        }

        if (pwfx->nChannels == 1 )
        {       
                info.play.channels = AUDIO_CHANNELS_MONO;
        }
        else if (pwfx->nChannels == 2 )
        {
                info.play.channels = AUDIO_CHANNELS_STEREO;
                samplewidth*=2;
        }

        info.play.sample_rate = pwfx->nSamplesPerSec;
        info.play.precision = pwfx->wBitsPerSample;
        info.play.samples = 0;
        info.play.eof = 0;
        info.play.error = 0;

        if (ioctl(g_dsp_fd, AUDIO_SETINFO, &info) == -1)
        {
                perror("AUDIO_SETINFO");
                close(g_dsp_fd);
                return False;
        }

        return True;
}

void
wave_out_write(STREAM s, uint16 tick, uint8 index)
{
        struct audio_packet *packet = &packet_queue[queue_hi];
        unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;

        if (next_hi == queue_lo)
        {
                error("No space to queue audio packet\n");
                return;
        }
        
        queue_hi = next_hi;

        packet->s = *s;
        packet->tick = tick;
        packet->index = index;

        /* we steal the data buffer from s, give it a new one */
        s->data = malloc(s->size);

        if (!g_dsp_busy)
                wave_out_play();
}

void
wave_out_play(void)
{
        struct audio_packet *packet;
        audio_info_t info;
        ssize_t len;
        unsigned int i;
        uint8 swap;
        STREAM out;
        static BOOL swapped = False;
        static BOOL sentcompletion = True;
        static int samplecnt;
        static int numsamples;

        while (1)
        {
                if (queue_lo == queue_hi)
                {
                        g_dsp_busy = 0;
                        return;
                }

                packet = &packet_queue[queue_lo];
                out = &packet->s;

                if ( swapaudio && ! swapped )
                {
                        for ( i = 0; i < out->end - out->p; i+=2 )
                        {
                                swap = *(out->p + i);
                                *(out->p + i ) = *(out->p + i + 1);
                                *(out->p + i + 1) = swap;
                                swapped = True;
                        }
                }

                if ( sentcompletion )
                {
                        if (ioctl(g_dsp_fd, AUDIO_GETINFO, &info) == -1)
                        {
                                perror("AUDIO_GETINFO");
                                return;
                        }
                        samplecnt=info.play.samples;
                        sentcompletion = False;
                        numsamples = (out->end-out->p)/samplewidth;
                }

                len=0;

                if ( out->end - out->p != 0 )
                {
                        len = write(g_dsp_fd, out->p, out->end - out->p);
                        if (len == -1)
                        {
                                if (errno != EWOULDBLOCK)
                                        perror("write audio");
                                g_dsp_busy = 1;
                                return;
                        }
                }

                out->p += len;
                if (out->p == out->end)
                {
                        if (ioctl(g_dsp_fd, AUDIO_GETINFO, &info) == -1)
                        {
                                perror("AUDIO_GETINFO");
                                return;
                        }
                        if ( info.play.samples >= samplecnt+(numsamples)*0.9 )
                        {
                                rdpsnd_send_completion(packet->tick, packet->index);
                                free(out->data);
                                queue_lo = (queue_lo + 1) % MAX_QUEUE;
                                swapped = False;
                                sentcompletion = True;
                        }
                        else
                        {
                                g_dsp_busy = 1;
                                return;
                        }
                }
        }
}
1	matthewc	476	/*
2			rdesktop: A Remote Desktop Protocol client.
3			Sound Channel Process Functions - Sun
4			Copyright (C) Matthew Chapman 2003
5			Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
6			Copyright (C) Michael Gernoth mike@zerfleddert.de 2003
7
8			This program is free software; you can redistribute it and/or modify
9			it under the terms of the GNU General Public License as published by
10			the Free Software Foundation; either version 2 of the License, or
11			(at your option) any later version.
12
13			This program is distributed in the hope that it will be useful,
14			but WITHOUT ANY WARRANTY; without even the implied warranty of
15			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16			GNU General Public License for more details.
17
18			You should have received a copy of the GNU General Public License
19			along with this program; if not, write to the Free Software
20			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21			*/
22
23			#include "rdesktop.h"
24			#include <unistd.h>
25			#include <fcntl.h>
26			#include <errno.h>
27			#include <sys/ioctl.h>
28			#include <sys/audio.h>
29			#include <stropts.h>
30
31			#define MAX_QUEUE 10
32
33			int g_dsp_fd;
34			BOOL g_dsp_busy;
35			static BOOL swapaudio;
36			static short samplewidth;
37
38			static struct audio_packet {
39			struct stream s;
40			uint16 tick;
41			uint8 index;
42			} packet_queue[MAX_QUEUE];
43			static unsigned int queue_hi, queue_lo;
44
45			BOOL
46			wave_out_open(void)
47			{
48			char *dsp_dev = "/dev/audio";
49
50			if ((g_dsp_fd = open(dsp_dev, O_WRONLY\|O_NONBLOCK)) == -1)
51			{
52			perror(dsp_dev);
53			return False;
54			}
55
56
57			/* Non-blocking so that user interface is responsive */
58			fcntl(g_dsp_fd, F_SETFL, fcntl(g_dsp_fd, F_GETFL)\|O_NONBLOCK);
59			queue_lo = queue_hi = 0;
60			return True;
61			}
62
63			void
64			wave_out_close(void)
65			{
66			ioctl(g_dsp_fd,I_FLUSH,FLUSHW);
67			close(g_dsp_fd);
68			}
69
70			BOOL
71			wave_out_format_supported(WAVEFORMATEX *pwfx)
72			{
73			if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
74			return False;
75			if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
76			return False;
77			if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
78			return False;
79
80			return True;
81			}
82
83			BOOL
84			wave_out_set_format(WAVEFORMATEX *pwfx)
85			{
86			audio_info_t info;
87			int test = 1;
88
89			ioctl(g_dsp_fd, AUDIO_DRAIN, 0);
90			swapaudio = False;
91			AUDIO_INITINFO(&info);
92
93
94			if (pwfx->wBitsPerSample == 8)
95			{
96			info.play.encoding = AUDIO_ENCODING_LINEAR8;
97			samplewidth=1;
98			}
99			else if (pwfx->wBitsPerSample == 16)
100			{
101			info.play.encoding = AUDIO_ENCODING_LINEAR;
102			swapaudio = !((uint8 ) (&test));
103			samplewidth=2;
104			}
105
106			if (pwfx->nChannels == 1 )
107			{
108			info.play.channels = AUDIO_CHANNELS_MONO;
109			}
110			else if (pwfx->nChannels == 2 )
111			{
112			info.play.channels = AUDIO_CHANNELS_STEREO;
113			samplewidth*=2;
114			}
115
116			info.play.sample_rate = pwfx->nSamplesPerSec;
117			info.play.precision = pwfx->wBitsPerSample;
118			info.play.samples = 0;
119			info.play.eof = 0;
120			info.play.error = 0;
121
122			if (ioctl(g_dsp_fd, AUDIO_SETINFO, &info) == -1)
123			{
124			perror("AUDIO_SETINFO");
125			close(g_dsp_fd);
126			return False;
127			}
128
129			return True;
130			}
131
132			void
133			wave_out_write(STREAM s, uint16 tick, uint8 index)
134			{
135			struct audio_packet *packet = &packet_queue[queue_hi];
136			unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;
137
138			if (next_hi == queue_lo)
139			{
140			error("No space to queue audio packet\n");
141			return;
142			}
143
144			queue_hi = next_hi;
145
146			packet->s = *s;
147			packet->tick = tick;
148			packet->index = index;
149
150			/* we steal the data buffer from s, give it a new one */
151			s->data = malloc(s->size);
152
153			if (!g_dsp_busy)
154			wave_out_play();
155			}
156
157			void
158			wave_out_play(void)
159			{
160			struct audio_packet *packet;
161			audio_info_t info;
162			ssize_t len;
163			unsigned int i;
164			uint8 swap;
165			STREAM out;
166			static BOOL swapped = False;
167			static BOOL sentcompletion = True;
168			static int samplecnt;
169			static int numsamples;
170
171			while (1)
172			{
173			if (queue_lo == queue_hi)
174			{
175			g_dsp_busy = 0;
176			return;
177			}
178
179			packet = &packet_queue[queue_lo];
180			out = &packet->s;
181
182			if ( swapaudio && ! swapped )
183			{
184			for ( i = 0; i < out->end - out->p; i+=2 )
185			{
186			swap = *(out->p + i);
187			(out->p + i ) = (out->p + i + 1);
188			*(out->p + i + 1) = swap;
189			swapped = True;
190			}
191			}
192
193			if ( sentcompletion )
194			{
195			if (ioctl(g_dsp_fd, AUDIO_GETINFO, &info) == -1)
196			{
197			perror("AUDIO_GETINFO");
198			return;
199			}
200			samplecnt=info.play.samples;
201			sentcompletion = False;
202			numsamples = (out->end-out->p)/samplewidth;
203			}
204
205			len=0;
206
207			if ( out->end - out->p != 0 )
208			{
209			len = write(g_dsp_fd, out->p, out->end - out->p);
210			if (len == -1)
211			{
212			if (errno != EWOULDBLOCK)
213			perror("write audio");
214			g_dsp_busy = 1;
215			return;
216			}
217			}
218
219			out->p += len;
220			if (out->p == out->end)
221			{
222			if (ioctl(g_dsp_fd, AUDIO_GETINFO, &info) == -1)
223			{
224			perror("AUDIO_GETINFO");
225			return;
226			}
227			if ( info.play.samples >= samplecnt+(numsamples)*0.9 )
228			{
229			rdpsnd_send_completion(packet->tick, packet->index);
230			free(out->data);
231			queue_lo = (queue_lo + 1) % MAX_QUEUE;
232			swapped = False;
233			sentcompletion = True;
234			}
235			else
236			{
237			g_dsp_busy = 1;
238			return;
239			}
240			}
241			}
242			}