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	/*
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	}