trunk/rdesktop/rdpsnd_sun.c

/* -*- c-basic-offset: 8 -*-
   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 2003-2006

   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 "rdpsnd.h"
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/audioio.h>

#if (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
#include <stropts.h>
#endif

#define DEFAULTDEVICE   "/dev/audio"

static BOOL g_reopened;
static short g_samplewidth;
static char *dsp_dev;

BOOL
sun_open(void)
{
        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);

        g_reopened = True;

        return True;
}

void
sun_close(void)
{
        /* Ack all remaining packets */
        while (!rdpsnd_queue_empty())
        {
                rdpsnd_send_completion(rdpsnd_queue_current_packet()->tick,
                                       rdpsnd_queue_current_packet()->index);
                rdpsnd_queue_next();
        }

#if defined I_FLUSH && defined FLUSHW
        /* Flush the audiobuffer */
        ioctl(g_dsp_fd, I_FLUSH, FLUSHW);
#endif
#if defined AUDIO_FLUSH
        ioctl(g_dsp_fd, AUDIO_FLUSH, NULL);
#endif
        close(g_dsp_fd);
}

BOOL
sun_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
sun_set_format(WAVEFORMATEX * pwfx)
{
        audio_info_t info;

        ioctl(g_dsp_fd, AUDIO_DRAIN, 0);
        AUDIO_INITINFO(&info);


        if (pwfx->wBitsPerSample == 8)
        {
                info.play.encoding = AUDIO_ENCODING_LINEAR8;
        }
        else if (pwfx->wBitsPerSample == 16)
        {
                info.play.encoding = AUDIO_ENCODING_LINEAR;
        }

        g_samplewidth = pwfx->wBitsPerSample / 8;

        if (pwfx->nChannels == 1)
        {
                info.play.channels = 1;
        }
        else if (pwfx->nChannels == 2)
        {
                info.play.channels = 2;
                g_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;
        g_reopened = True;

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

        return True;
}

void
sun_volume(uint16 left, uint16 right)
{
        audio_info_t info;
        uint balance;
        uint volume;

        AUDIO_INITINFO(&info);

        volume = (left > right) ? left : right;

        if (volume / AUDIO_MID_BALANCE != 0)
        {
                balance =
                        AUDIO_MID_BALANCE - (left / (volume / AUDIO_MID_BALANCE)) +
                        (right / (volume / AUDIO_MID_BALANCE));
        }
        else
        {
                balance = AUDIO_MID_BALANCE;
        }

        info.play.gain = volume / (65536 / AUDIO_MAX_GAIN);
        info.play.balance = balance;

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

void
sun_play(void)
{
        struct audio_packet *packet;
        audio_info_t info;
        ssize_t len;
        unsigned int i;
        STREAM out;
        static BOOL sentcompletion = True;
        static uint32 samplecnt = 0;
        static uint32 numsamples;

        while (1)
        {
                if (g_reopened)
                {
                        /* Device was just (re)openend */
                        samplecnt = 0;
                        sentcompletion = True;
                        g_reopened = False;
                }

                if (rdpsnd_queue_empty())
                {
                        g_dsp_busy = 0;
                        return;
                }

                packet = rdpsnd_queue_current_packet();
                out = &packet->s;

                if (sentcompletion)
                {
                        sentcompletion = False;
                        numsamples = (out->end - out->p) / g_samplewidth;
                }

                len = 0;

                if (out->end != out->p)
                {
                        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;
                        }

                        /* Ack the packet, if we have played at least 70% */
                        if (info.play.samples >= samplecnt + ((numsamples * 7) / 10))
                        {
                                samplecnt += numsamples;
                                /* We need to add 50 to tell windows that time has passed while
                                 * playing this packet */
                                rdpsnd_queue_next(50);
                                sentcompletion = True;
                        }
                        else
                        {
                                g_dsp_busy = 1;
                                return;
                        }
                }
        }
}

struct audio_driver *
sun_register(char *options)
{
        static struct audio_driver sun_driver;

        sun_driver.wave_out_open = sun_open;
        sun_driver.wave_out_close = sun_close;
        sun_driver.wave_out_format_supported = sun_format_supported;
        sun_driver.wave_out_set_format = sun_set_format;
        sun_driver.wave_out_volume = sun_volume;
        sun_driver.wave_out_play = sun_play;
        sun_driver.name = xstrdup("sun");
        sun_driver.description =
                xstrdup("SUN/BSD output driver, default device: " DEFAULTDEVICE " or $AUDIODEV");
        sun_driver.need_byteswap_on_be = 1;
        sun_driver.need_resampling = 0;
        sun_driver.next = NULL;

        if (options)
        {
                dsp_dev = xstrdup(options);
        }
        else
        {
                dsp_dev = getenv("AUDIODEV");

                if (dsp_dev == NULL)
                {
                        dsp_dev = xstrdup(DEFAULTDEVICE);
                }
        }

        return &sun_driver;
}
1	/* -- c-basic-offset: 8 --
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 2003-2006
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 "rdpsnd.h"
25	#include <unistd.h>
26	#include <fcntl.h>
27	#include <errno.h>
28	#include <sys/ioctl.h>
29	#include <sys/audioio.h>
30
31	#if (defined(sun) && (defined(__svr4__) \|\| defined(__SVR4)))
32	#include <stropts.h>
33	#endif
34
35	#define DEFAULTDEVICE "/dev/audio"
36
37	static BOOL g_reopened;
38	static short g_samplewidth;
39	static char *dsp_dev;
40
41	BOOL
42	sun_open(void)
43	{
44	if ((g_dsp_fd = open(dsp_dev, O_WRONLY \| O_NONBLOCK)) == -1)
45	{
46	perror(dsp_dev);
47	return False;
48	}
49
50	/* Non-blocking so that user interface is responsive */
51	fcntl(g_dsp_fd, F_SETFL, fcntl(g_dsp_fd, F_GETFL) \| O_NONBLOCK);
52
53	g_reopened = True;
54
55	return True;
56	}
57
58	void
59	sun_close(void)
60	{
61	/* Ack all remaining packets */
62	while (!rdpsnd_queue_empty())
63	{
64	rdpsnd_send_completion(rdpsnd_queue_current_packet()->tick,
65	rdpsnd_queue_current_packet()->index);
66	rdpsnd_queue_next();
67	}
68
69	#if defined I_FLUSH && defined FLUSHW
70	/* Flush the audiobuffer */
71	ioctl(g_dsp_fd, I_FLUSH, FLUSHW);
72	#endif
73	#if defined AUDIO_FLUSH
74	ioctl(g_dsp_fd, AUDIO_FLUSH, NULL);
75	#endif
76	close(g_dsp_fd);
77	}
78
79	BOOL
80	sun_format_supported(WAVEFORMATEX * pwfx)
81	{
82	if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
83	return False;
84	if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
85	return False;
86	if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
87	return False;
88
89	return True;
90	}
91
92	BOOL
93	sun_set_format(WAVEFORMATEX * pwfx)
94	{
95	audio_info_t info;
96
97	ioctl(g_dsp_fd, AUDIO_DRAIN, 0);
98	AUDIO_INITINFO(&info);
99
100
101	if (pwfx->wBitsPerSample == 8)
102	{
103	info.play.encoding = AUDIO_ENCODING_LINEAR8;
104	}
105	else if (pwfx->wBitsPerSample == 16)
106	{
107	info.play.encoding = AUDIO_ENCODING_LINEAR;
108	}
109
110	g_samplewidth = pwfx->wBitsPerSample / 8;
111
112	if (pwfx->nChannels == 1)
113	{
114	info.play.channels = 1;
115	}
116	else if (pwfx->nChannels == 2)
117	{
118	info.play.channels = 2;
119	g_samplewidth *= 2;
120	}
121
122	info.play.sample_rate = pwfx->nSamplesPerSec;
123	info.play.precision = pwfx->wBitsPerSample;
124	info.play.samples = 0;
125	info.play.eof = 0;
126	info.play.error = 0;
127	g_reopened = True;
128
129	if (ioctl(g_dsp_fd, AUDIO_SETINFO, &info) == -1)
130	{
131	perror("AUDIO_SETINFO");
132	close(g_dsp_fd);
133	return False;
134	}
135
136	return True;
137	}
138
139	void
140	sun_volume(uint16 left, uint16 right)
141	{
142	audio_info_t info;
143	uint balance;
144	uint volume;
145
146	AUDIO_INITINFO(&info);
147
148	volume = (left > right) ? left : right;
149
150	if (volume / AUDIO_MID_BALANCE != 0)
151	{
152	balance =
153	AUDIO_MID_BALANCE - (left / (volume / AUDIO_MID_BALANCE)) +
154	(right / (volume / AUDIO_MID_BALANCE));
155	}
156	else
157	{
158	balance = AUDIO_MID_BALANCE;
159	}
160
161	info.play.gain = volume / (65536 / AUDIO_MAX_GAIN);
162	info.play.balance = balance;
163
164	if (ioctl(g_dsp_fd, AUDIO_SETINFO, &info) == -1)
165	{
166	perror("AUDIO_SETINFO");
167	return;
168	}
169	}
170
171	void
172	sun_play(void)
173	{
174	struct audio_packet *packet;
175	audio_info_t info;
176	ssize_t len;
177	unsigned int i;
178	STREAM out;
179	static BOOL sentcompletion = True;
180	static uint32 samplecnt = 0;
181	static uint32 numsamples;
182
183	while (1)
184	{
185	if (g_reopened)
186	{
187	/* Device was just (re)openend */
188	samplecnt = 0;
189	sentcompletion = True;
190	g_reopened = False;
191	}
192
193	if (rdpsnd_queue_empty())
194	{
195	g_dsp_busy = 0;
196	return;
197	}
198
199	packet = rdpsnd_queue_current_packet();
200	out = &packet->s;
201
202	if (sentcompletion)
203	{
204	sentcompletion = False;
205	numsamples = (out->end - out->p) / g_samplewidth;
206	}
207
208	len = 0;
209
210	if (out->end != out->p)
211	{
212	len = write(g_dsp_fd, out->p, out->end - out->p);
213	if (len == -1)
214	{
215	if (errno != EWOULDBLOCK)
216	perror("write audio");
217	g_dsp_busy = 1;
218	return;
219	}
220	}
221
222	out->p += len;
223	if (out->p == out->end)
224	{
225	if (ioctl(g_dsp_fd, AUDIO_GETINFO, &info) == -1)
226	{
227	perror("AUDIO_GETINFO");
228	return;
229	}
230
231	/* Ack the packet, if we have played at least 70% */
232	if (info.play.samples >= samplecnt + ((numsamples * 7) / 10))
233	{
234	samplecnt += numsamples;
235	/* We need to add 50 to tell windows that time has passed while
236	* playing this packet */
237	rdpsnd_queue_next(50);
238	sentcompletion = True;
239	}
240	else
241	{
242	g_dsp_busy = 1;
243	return;
244	}
245	}
246	}
247	}
248
249	struct audio_driver *
250	sun_register(char *options)
251	{
252	static struct audio_driver sun_driver;
253
254	sun_driver.wave_out_open = sun_open;
255	sun_driver.wave_out_close = sun_close;
256	sun_driver.wave_out_format_supported = sun_format_supported;
257	sun_driver.wave_out_set_format = sun_set_format;
258	sun_driver.wave_out_volume = sun_volume;
259	sun_driver.wave_out_play = sun_play;
260	sun_driver.name = xstrdup("sun");
261	sun_driver.description =
262	xstrdup("SUN/BSD output driver, default device: " DEFAULTDEVICE " or $AUDIODEV");
263	sun_driver.need_byteswap_on_be = 1;
264	sun_driver.need_resampling = 0;
265	sun_driver.next = NULL;
266
267	if (options)
268	{
269	dsp_dev = xstrdup(options);
270	}
271	else
272	{
273	dsp_dev = getenv("AUDIODEV");
274
275	if (dsp_dev == NULL)
276	{
277	dsp_dev = xstrdup(DEFAULTDEVICE);
278	}
279	}
280
281	return &sun_driver;
282	}