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	astrand	963	/* -- c-basic-offset: 8 --
2	matthewc	476	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	stargo	1254	Copyright (C) Michael Gernoth mike@zerfleddert.de 2003-2006
7	matthewc	476
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	stargo	1254	#include "rdpsnd.h"
25	matthewc	476	#include <unistd.h>
26			#include <fcntl.h>
27			#include <errno.h>
28			#include <sys/ioctl.h>
29	matthewc	477	#include <sys/audioio.h>
30	matthewc	476
31	stargo	560	#if (defined(sun) && (defined(__svr4__) \|\| defined(__SVR4)))
32			#include <stropts.h>
33			#endif
34
35	stargo	1254	#define DEFAULTDEVICE "/dev/audio"
36	matthewc	476
37	ossman_	1346	static int dsp_fd = -1;
38			static BOOL dsp_busy;
39
40	stargo	510	static BOOL g_reopened;
41			static short g_samplewidth;
42	stargo	1255	static char *dsp_dev;
43	matthewc	476
44	stargo	1347	void sun_play(void);
45	ossman_	1346
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	matthewc	476	BOOL
68	stargo	1255	sun_open(void)
69	matthewc	476	{
70	ossman_	1346	if ((dsp_fd = open(dsp_dev, O_WRONLY \| O_NONBLOCK)) == -1)
71	matthewc	476	{
72			perror(dsp_dev);
73			return False;
74			}
75
76			/* Non-blocking so that user interface is responsive */
77	ossman_	1346	fcntl(dsp_fd, F_SETFL, fcntl(dsp_fd, F_GETFL) \| O_NONBLOCK);
78	astrand	499
79	stargo	510	g_reopened = True;
80	astrand	499
81	matthewc	476	return True;
82			}
83
84			void
85	stargo	1255	sun_close(void)
86	matthewc	476	{
87	matthewc	477	/* Ack all remaining packets */
88	stargo	1254	while (!rdpsnd_queue_empty())
89	ossman_	1304	rdpsnd_queue_next(0);
90	matthewc	477
91	stargo	538	#if defined I_FLUSH && defined FLUSHW
92	matthewc	477	/* Flush the audiobuffer */
93	ossman_	1346	ioctl(dsp_fd, I_FLUSH, FLUSHW);
94	stargo	538	#endif
95	stargo	561	#if defined AUDIO_FLUSH
96	ossman_	1346	ioctl(dsp_fd, AUDIO_FLUSH, NULL);
97	stargo	561	#endif
98	ossman_	1346	close(dsp_fd);
99			dsp_fd = -1;
100	matthewc	476	}
101
102			BOOL
103	stargo	1255	sun_format_supported(WAVEFORMATEX * pwfx)
104	matthewc	476	{
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	stargo	1255	sun_set_format(WAVEFORMATEX * pwfx)
117	matthewc	476	{
118			audio_info_t info;
119
120	ossman_	1346	ioctl(dsp_fd, AUDIO_DRAIN, 0);
121	matthewc	476	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	stargo	510	g_samplewidth = pwfx->wBitsPerSample / 8;
134	stargo	491
135	astrand	499	if (pwfx->nChannels == 1)
136			{
137	matthewc	514	info.play.channels = 1;
138	matthewc	476	}
139	astrand	499	else if (pwfx->nChannels == 2)
140	matthewc	476	{
141	matthewc	514	info.play.channels = 2;
142	stargo	510	g_samplewidth *= 2;
143	matthewc	476	}
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	stargo	510	g_reopened = True;
151	matthewc	476
152	ossman_	1346	if (ioctl(dsp_fd, AUDIO_SETINFO, &info) == -1)
153	matthewc	476	{
154			perror("AUDIO_SETINFO");
155	ossman_	1346	sun_close();
156	matthewc	476	return False;
157			}
158
159			return True;
160			}
161
162			void
163	stargo	1255	sun_volume(uint16 left, uint16 right)
164	stargo	491	{
165			audio_info_t info;
166			uint balance;
167			uint volume;
168
169	stargo	772	AUDIO_INITINFO(&info);
170	stargo	491
171			volume = (left > right) ? left : right;
172
173	astrand	499	if (volume / AUDIO_MID_BALANCE != 0)
174	stargo	491	{
175	astrand	499	balance =
176			AUDIO_MID_BALANCE - (left / (volume / AUDIO_MID_BALANCE)) +
177			(right / (volume / AUDIO_MID_BALANCE));
178	stargo	491	}
179			else
180			{
181			balance = AUDIO_MID_BALANCE;
182			}
183
184	astrand	499	info.play.gain = volume / (65536 / AUDIO_MAX_GAIN);
185	stargo	491	info.play.balance = balance;
186
187	ossman_	1346	if (ioctl(dsp_fd, AUDIO_SETINFO, &info) == -1)
188	stargo	491	{
189			perror("AUDIO_SETINFO");
190			return;
191			}
192			}
193
194			void
195	stargo	1255	sun_play(void)
196	matthewc	476	{
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	matthewc	477	static uint32 samplecnt = 0;
204			static uint32 numsamples;
205	matthewc	476
206			while (1)
207			{
208	stargo	510	if (g_reopened)
209	matthewc	477	{
210			/* Device was just (re)openend */
211			samplecnt = 0;
212			sentcompletion = True;
213	stargo	510	g_reopened = False;
214	matthewc	477	}
215
216	stargo	1254	if (rdpsnd_queue_empty())
217	matthewc	476	return;
218
219	stargo	1254	packet = rdpsnd_queue_current_packet();
220	matthewc	476	out = &packet->s;
221
222	astrand	499	if (sentcompletion)
223	matthewc	476	{
224			sentcompletion = False;
225	stargo	510	numsamples = (out->end - out->p) / g_samplewidth;
226	matthewc	476	}
227
228	astrand	499	len = 0;
229	matthewc	476
230	astrand	499	if (out->end != out->p)
231	matthewc	476	{
232	ossman_	1346	len = write(dsp_fd, out->p, out->end - out->p);
233	matthewc	476	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	ossman_	1346	if (ioctl(dsp_fd, AUDIO_GETINFO, &info) == -1)
245	matthewc	476	{
246			perror("AUDIO_GETINFO");
247			return;
248			}
249	matthewc	477
250			/* Ack the packet, if we have played at least 70% */
251	astrand	499	if (info.play.samples >= samplecnt + ((numsamples * 7) / 10))
252	matthewc	476	{
253	matthewc	477	samplecnt += numsamples;
254	stargo	1254	/* We need to add 50 to tell windows that time has passed while
255			* playing this packet */
256	ossman_	1302	rdpsnd_queue_next(50);
257	matthewc	476	sentcompletion = True;
258			}
259			else
260			{
261			return;
262			}
263			}
264			}
265			}
266	stargo	1255
267	ossman_	1345	static struct audio_driver sun_driver = {
268			.name = "sun",
269			.description = "SUN/BSD output driver, default device: " DEFAULTDEVICE " or $AUDIODEV",
270
271	ossman_	1346	.add_fds = sun_add_fds,
272			.check_fds = sun_check_fds,
273
274	ossman_	1345	.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	stargo	1255	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			}