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 int dsp_fd = -1;
static BOOL dsp_busy;

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

void sun_play(void);

void
sun_add_fds(int *n, fd_set * rfds, fd_set * wfds, struct timeval *tv)
{
        if (dsp_fd == -1)
                return;

        if (rdpsnd_queue_empty())
                return;

        FD_SET(dsp_fd, wfds);
        if (dsp_fd > *n)
                *n = dsp_fd;
}

void
sun_check_fds(fd_set * rfds, fd_set * wfds)
{
        if (FD_ISSET(dsp_fd, wfds))
                sun_play();
}

BOOL
sun_open(void)
{
        if ((dsp_fd = open(dsp_dev, O_WRONLY | O_NONBLOCK)) == -1)
        {
                perror(dsp_dev);
                return False;
        }

        /* Non-blocking so that user interface is responsive */
        fcntl(dsp_fd, F_SETFL, fcntl(dsp_fd, F_GETFL) | O_NONBLOCK);

        g_reopened = True;

        return True;
}

void
sun_close(void)
{
        /* Ack all remaining packets */
        while (!rdpsnd_queue_empty())
                rdpsnd_queue_next(0);

#if defined I_FLUSH && defined FLUSHW
        /* Flush the audiobuffer */
        ioctl(dsp_fd, I_FLUSH, FLUSHW);
#endif
#if defined AUDIO_FLUSH
        ioctl(dsp_fd, AUDIO_FLUSH, NULL);
#endif
        close(dsp_fd);
        dsp_fd = -1;
}

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(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(dsp_fd, AUDIO_SETINFO, &info) == -1)
        {
                perror("AUDIO_SETINFO");
                sun_close();
                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(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())
                        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(dsp_fd, out->p, out->end - out->p);
                        if (len == -1)
                        {
                                if (errno != EWOULDBLOCK)
                                        perror("write audio");
                                return;
                        }
                }

                out->p += len;
                if (out->p == out->end)
                {
                        if (ioctl(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
                        {
                                return;
                        }
                }
        }
}

static struct audio_driver sun_driver = {
        .name = "sun",
        .description = "SUN/BSD output driver, default device: " DEFAULTDEVICE " or $AUDIODEV",

        .add_fds = sun_add_fds,
        .check_fds = sun_check_fds,

        .wave_out_open = sun_open,
        .wave_out_close = sun_close,
        .wave_out_format_supported = sun_format_supported,
        .wave_out_set_format = sun_set_format,
        .wave_out_volume = sun_volume,

        .need_byteswap_on_be = 1,
        .need_resampling = 0,
};

struct audio_driver *
sun_register(char *options)
{
        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 int dsp_fd = -1;
38	static BOOL dsp_busy;
39
40	static BOOL g_reopened;
41	static short g_samplewidth;
42	static char *dsp_dev;
43
44	void sun_play(void);
45
46	void
47	sun_add_fds(int n, fd_set rfds, fd_set * wfds, struct timeval *tv)
48	{
49	if (dsp_fd == -1)
50	return;
51
52	if (rdpsnd_queue_empty())
53	return;
54
55	FD_SET(dsp_fd, wfds);
56	if (dsp_fd > *n)
57	*n = dsp_fd;
58	}
59
60	void
61	sun_check_fds(fd_set * rfds, fd_set * wfds)
62	{
63	if (FD_ISSET(dsp_fd, wfds))
64	sun_play();
65	}
66
67	BOOL
68	sun_open(void)
69	{
70	if ((dsp_fd = open(dsp_dev, O_WRONLY \| O_NONBLOCK)) == -1)
71	{
72	perror(dsp_dev);
73	return False;
74	}
75
76	/* Non-blocking so that user interface is responsive */
77	fcntl(dsp_fd, F_SETFL, fcntl(dsp_fd, F_GETFL) \| O_NONBLOCK);
78
79	g_reopened = True;
80
81	return True;
82	}
83
84	void
85	sun_close(void)
86	{
87	/* Ack all remaining packets */
88	while (!rdpsnd_queue_empty())
89	rdpsnd_queue_next(0);
90
91	#if defined I_FLUSH && defined FLUSHW
92	/* Flush the audiobuffer */
93	ioctl(dsp_fd, I_FLUSH, FLUSHW);
94	#endif
95	#if defined AUDIO_FLUSH
96	ioctl(dsp_fd, AUDIO_FLUSH, NULL);
97	#endif
98	close(dsp_fd);
99	dsp_fd = -1;
100	}
101
102	BOOL
103	sun_format_supported(WAVEFORMATEX * pwfx)
104	{
105	if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
106	return False;
107	if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
108	return False;
109	if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
110	return False;
111
112	return True;
113	}
114
115	BOOL
116	sun_set_format(WAVEFORMATEX * pwfx)
117	{
118	audio_info_t info;
119
120	ioctl(dsp_fd, AUDIO_DRAIN, 0);
121	AUDIO_INITINFO(&info);
122
123
124	if (pwfx->wBitsPerSample == 8)
125	{
126	info.play.encoding = AUDIO_ENCODING_LINEAR8;
127	}
128	else if (pwfx->wBitsPerSample == 16)
129	{
130	info.play.encoding = AUDIO_ENCODING_LINEAR;
131	}
132
133	g_samplewidth = pwfx->wBitsPerSample / 8;
134
135	if (pwfx->nChannels == 1)
136	{
137	info.play.channels = 1;
138	}
139	else if (pwfx->nChannels == 2)
140	{
141	info.play.channels = 2;
142	g_samplewidth *= 2;
143	}
144
145	info.play.sample_rate = pwfx->nSamplesPerSec;
146	info.play.precision = pwfx->wBitsPerSample;
147	info.play.samples = 0;
148	info.play.eof = 0;
149	info.play.error = 0;
150	g_reopened = True;
151
152	if (ioctl(dsp_fd, AUDIO_SETINFO, &info) == -1)
153	{
154	perror("AUDIO_SETINFO");
155	sun_close();
156	return False;
157	}
158
159	return True;
160	}
161
162	void
163	sun_volume(uint16 left, uint16 right)
164	{
165	audio_info_t info;
166	uint balance;
167	uint volume;
168
169	AUDIO_INITINFO(&info);
170
171	volume = (left > right) ? left : right;
172
173	if (volume / AUDIO_MID_BALANCE != 0)
174	{
175	balance =
176	AUDIO_MID_BALANCE - (left / (volume / AUDIO_MID_BALANCE)) +
177	(right / (volume / AUDIO_MID_BALANCE));
178	}
179	else
180	{
181	balance = AUDIO_MID_BALANCE;
182	}
183
184	info.play.gain = volume / (65536 / AUDIO_MAX_GAIN);
185	info.play.balance = balance;
186
187	if (ioctl(dsp_fd, AUDIO_SETINFO, &info) == -1)
188	{
189	perror("AUDIO_SETINFO");
190	return;
191	}
192	}
193
194	void
195	sun_play(void)
196	{
197	struct audio_packet *packet;
198	audio_info_t info;
199	ssize_t len;
200	unsigned int i;
201	STREAM out;
202	static BOOL sentcompletion = True;
203	static uint32 samplecnt = 0;
204	static uint32 numsamples;
205
206	while (1)
207	{
208	if (g_reopened)
209	{
210	/* Device was just (re)openend */
211	samplecnt = 0;
212	sentcompletion = True;
213	g_reopened = False;
214	}
215
216	if (rdpsnd_queue_empty())
217	return;
218
219	packet = rdpsnd_queue_current_packet();
220	out = &packet->s;
221
222	if (sentcompletion)
223	{
224	sentcompletion = False;
225	numsamples = (out->end - out->p) / g_samplewidth;
226	}
227
228	len = 0;
229
230	if (out->end != out->p)
231	{
232	len = write(dsp_fd, out->p, out->end - out->p);
233	if (len == -1)
234	{
235	if (errno != EWOULDBLOCK)
236	perror("write audio");
237	return;
238	}
239	}
240
241	out->p += len;
242	if (out->p == out->end)
243	{
244	if (ioctl(dsp_fd, AUDIO_GETINFO, &info) == -1)
245	{
246	perror("AUDIO_GETINFO");
247	return;
248	}
249
250	/* Ack the packet, if we have played at least 70% */
251	if (info.play.samples >= samplecnt + ((numsamples * 7) / 10))
252	{
253	samplecnt += numsamples;
254	/* We need to add 50 to tell windows that time has passed while
255	* playing this packet */
256	rdpsnd_queue_next(50);
257	sentcompletion = True;
258	}
259	else
260	{
261	return;
262	}
263	}
264	}
265	}
266
267	static struct audio_driver sun_driver = {
268	.name = "sun",
269	.description = "SUN/BSD output driver, default device: " DEFAULTDEVICE " or $AUDIODEV",
270
271	.add_fds = sun_add_fds,
272	.check_fds = sun_check_fds,
273
274	.wave_out_open = sun_open,
275	.wave_out_close = sun_close,
276	.wave_out_format_supported = sun_format_supported,
277	.wave_out_set_format = sun_set_format,
278	.wave_out_volume = sun_volume,
279
280	.need_byteswap_on_be = 1,
281	.need_resampling = 0,
282	};
283
284	struct audio_driver *
285	sun_register(char *options)
286	{
287	if (options)
288	{
289	dsp_dev = xstrdup(options);
290	}
291	else
292	{
293	dsp_dev = getenv("AUDIODEV");
294
295	if (dsp_dev == NULL)
296	{
297	dsp_dev = xstrdup(DEFAULTDEVICE);
298	}
299	}
300
301	return &sun_driver;
302	}