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 BOOL g_swapaudio;
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);

        rdpsnd_queue_init();
        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);
        g_swapaudio = False;
        AUDIO_INITINFO(&info);


        if (pwfx->wBitsPerSample == 8)
        {
                info.play.encoding = AUDIO_ENCODING_LINEAR8;
        }
        else if (pwfx->wBitsPerSample == 16)
        {
                info.play.encoding = AUDIO_ENCODING_LINEAR;
                /* Do we need to swap the 16bit values? (Are we BigEndian) */
#ifdef B_ENDIAN
                g_swapaudio = 1;
#else
                g_swapaudio = 0;
#endif
        }

        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;
        uint8 swap;
        STREAM out;
        static BOOL swapped = False;
        static BOOL sentcompletion = True;
        static uint32 samplecnt = 0;
        static uint32 numsamples;

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

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

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

                /* Swap the current packet, but only once */
                if (g_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)
                {
                        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_send_completion(packet->tick + 50, packet->index);
                                rdpsnd_queue_next();
                                swapped = False;
                                sentcompletion = True;
                        }
                        else
                        {
                                g_dsp_busy = 1;
                                return;
                        }
                }
        }
}

static struct audio_driver sun_driver = {
      wave_out_write:rdpsnd_queue_write,
      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,
      wave_out_play:sun_play,
      name:"sun",
      description:"SUN/BSD output driver, default device: " DEFAULTDEVICE " or $AUDIODEV",
      next:NULL,
};

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	stargo	510	static BOOL g_reopened;
38			static BOOL g_swapaudio;
39			static short g_samplewidth;
40	stargo	1255	static char *dsp_dev;
41	matthewc	476
42			BOOL
43	stargo	1255	sun_open(void)
44	matthewc	476	{
45	astrand	499	if ((g_dsp_fd = open(dsp_dev, O_WRONLY \| O_NONBLOCK)) == -1)
46	matthewc	476	{
47			perror(dsp_dev);
48			return False;
49			}
50
51			/* Non-blocking so that user interface is responsive */
52	astrand	499	fcntl(g_dsp_fd, F_SETFL, fcntl(g_dsp_fd, F_GETFL) \| O_NONBLOCK);
53
54	stargo	1254	rdpsnd_queue_init();
55	stargo	510	g_reopened = True;
56	astrand	499
57	matthewc	476	return True;
58			}
59
60			void
61	stargo	1255	sun_close(void)
62	matthewc	476	{
63	matthewc	477	/* Ack all remaining packets */
64	stargo	1254	while (!rdpsnd_queue_empty())
65	matthewc	477	{
66	stargo	1254	rdpsnd_send_completion(rdpsnd_queue_current_packet()->tick,
67			rdpsnd_queue_current_packet()->index);
68			rdpsnd_queue_next();
69	matthewc	477	}
70
71	stargo	538	#if defined I_FLUSH && defined FLUSHW
72	matthewc	477	/* Flush the audiobuffer */
73	astrand	499	ioctl(g_dsp_fd, I_FLUSH, FLUSHW);
74	stargo	538	#endif
75	stargo	561	#if defined AUDIO_FLUSH
76			ioctl(g_dsp_fd, AUDIO_FLUSH, NULL);
77			#endif
78	matthewc	476	close(g_dsp_fd);
79			}
80
81			BOOL
82	stargo	1255	sun_format_supported(WAVEFORMATEX * pwfx)
83	matthewc	476	{
84			if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
85			return False;
86			if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
87			return False;
88			if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
89			return False;
90
91			return True;
92			}
93
94			BOOL
95	stargo	1255	sun_set_format(WAVEFORMATEX * pwfx)
96	matthewc	476	{
97			audio_info_t info;
98
99			ioctl(g_dsp_fd, AUDIO_DRAIN, 0);
100	stargo	510	g_swapaudio = False;
101	matthewc	476	AUDIO_INITINFO(&info);
102
103
104			if (pwfx->wBitsPerSample == 8)
105			{
106			info.play.encoding = AUDIO_ENCODING_LINEAR8;
107			}
108			else if (pwfx->wBitsPerSample == 16)
109			{
110			info.play.encoding = AUDIO_ENCODING_LINEAR;
111	matthewc	477	/* Do we need to swap the 16bit values? (Are we BigEndian) */
112	stargo	694	#ifdef B_ENDIAN
113			g_swapaudio = 1;
114			#else
115			g_swapaudio = 0;
116			#endif
117	matthewc	476	}
118
119	stargo	510	g_samplewidth = pwfx->wBitsPerSample / 8;
120	stargo	491
121	astrand	499	if (pwfx->nChannels == 1)
122			{
123	matthewc	514	info.play.channels = 1;
124	matthewc	476	}
125	astrand	499	else if (pwfx->nChannels == 2)
126	matthewc	476	{
127	matthewc	514	info.play.channels = 2;
128	stargo	510	g_samplewidth *= 2;
129	matthewc	476	}
130
131			info.play.sample_rate = pwfx->nSamplesPerSec;
132			info.play.precision = pwfx->wBitsPerSample;
133			info.play.samples = 0;
134			info.play.eof = 0;
135			info.play.error = 0;
136	stargo	510	g_reopened = True;
137	matthewc	476
138			if (ioctl(g_dsp_fd, AUDIO_SETINFO, &info) == -1)
139			{
140			perror("AUDIO_SETINFO");
141			close(g_dsp_fd);
142			return False;
143			}
144
145			return True;
146			}
147
148			void
149	stargo	1255	sun_volume(uint16 left, uint16 right)
150	stargo	491	{
151			audio_info_t info;
152			uint balance;
153			uint volume;
154
155	stargo	772	AUDIO_INITINFO(&info);
156	stargo	491
157			volume = (left > right) ? left : right;
158
159	astrand	499	if (volume / AUDIO_MID_BALANCE != 0)
160	stargo	491	{
161	astrand	499	balance =
162			AUDIO_MID_BALANCE - (left / (volume / AUDIO_MID_BALANCE)) +
163			(right / (volume / AUDIO_MID_BALANCE));
164	stargo	491	}
165			else
166			{
167			balance = AUDIO_MID_BALANCE;
168			}
169
170	astrand	499	info.play.gain = volume / (65536 / AUDIO_MAX_GAIN);
171	stargo	491	info.play.balance = balance;
172
173			if (ioctl(g_dsp_fd, AUDIO_SETINFO, &info) == -1)
174			{
175			perror("AUDIO_SETINFO");
176			return;
177			}
178			}
179
180			void
181	stargo	1255	sun_play(void)
182	matthewc	476	{
183			struct audio_packet *packet;
184			audio_info_t info;
185			ssize_t len;
186			unsigned int i;
187			uint8 swap;
188			STREAM out;
189			static BOOL swapped = False;
190			static BOOL sentcompletion = True;
191	matthewc	477	static uint32 samplecnt = 0;
192			static uint32 numsamples;
193	matthewc	476
194			while (1)
195			{
196	stargo	510	if (g_reopened)
197	matthewc	477	{
198			/* Device was just (re)openend */
199			samplecnt = 0;
200			swapped = False;
201			sentcompletion = True;
202	stargo	510	g_reopened = False;
203	matthewc	477	}
204
205	stargo	1254	if (rdpsnd_queue_empty())
206	matthewc	476	{
207			g_dsp_busy = 0;
208			return;
209			}
210
211	stargo	1254	packet = rdpsnd_queue_current_packet();
212	matthewc	476	out = &packet->s;
213
214	matthewc	477	/* Swap the current packet, but only once */
215	stargo	510	if (g_swapaudio && !swapped)
216	matthewc	476	{
217	astrand	499	for (i = 0; i < out->end - out->p; i += 2)
218	matthewc	476	{
219			swap = *(out->p + i);
220	stargo	491	(out->p + i) = (out->p + i + 1);
221	matthewc	476	*(out->p + i + 1) = swap;
222			}
223	stargo	491	swapped = True;
224	matthewc	476	}
225
226	astrand	499	if (sentcompletion)
227	matthewc	476	{
228			sentcompletion = False;
229	stargo	510	numsamples = (out->end - out->p) / g_samplewidth;
230	matthewc	476	}
231
232	astrand	499	len = 0;
233	matthewc	476
234	astrand	499	if (out->end != out->p)
235	matthewc	476	{
236			len = write(g_dsp_fd, out->p, out->end - out->p);
237			if (len == -1)
238			{
239			if (errno != EWOULDBLOCK)
240			perror("write audio");
241			g_dsp_busy = 1;
242			return;
243			}
244			}
245
246			out->p += len;
247			if (out->p == out->end)
248			{
249			if (ioctl(g_dsp_fd, AUDIO_GETINFO, &info) == -1)
250			{
251			perror("AUDIO_GETINFO");
252			return;
253			}
254	matthewc	477
255			/* Ack the packet, if we have played at least 70% */
256	astrand	499	if (info.play.samples >= samplecnt + ((numsamples * 7) / 10))
257	matthewc	476	{
258	matthewc	477	samplecnt += numsamples;
259	stargo	1254	/* We need to add 50 to tell windows that time has passed while
260			* playing this packet */
261			rdpsnd_send_completion(packet->tick + 50, packet->index);
262			rdpsnd_queue_next();
263	matthewc	476	swapped = False;
264			sentcompletion = True;
265			}
266			else
267			{
268			g_dsp_busy = 1;
269			return;
270			}
271			}
272			}
273			}
274	stargo	1255
275			static struct audio_driver sun_driver = {
276			wave_out_write:rdpsnd_queue_write,
277			wave_out_open:sun_open,
278			wave_out_close:sun_close,
279			wave_out_format_supported:sun_format_supported,
280			wave_out_set_format:sun_set_format,
281			wave_out_volume:sun_volume,
282			wave_out_play:sun_play,
283			name:"sun",
284			description:"SUN/BSD output driver, default device: " DEFAULTDEVICE " or $AUDIODEV",
285			next:NULL,
286			};
287
288			struct audio_driver *
289			sun_register(char *options)
290			{
291			if (options)
292			{
293			dsp_dev = xstrdup(options);
294			}
295			else
296			{
297			dsp_dev = getenv("AUDIODEV");
298
299			if (dsp_dev == NULL)
300			{
301			dsp_dev = xstrdup(DEFAULTDEVICE);
302			}
303			}
304
305			return &sun_driver;
306			}