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/audioio.h>

#define MAX_QUEUE       10

int g_dsp_fd;
BOOL g_dsp_busy = False;
static BOOL g_reopened;
static BOOL g_swapaudio;
static short g_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 = getenv("AUDIODEV");

        if (dsp_dev == NULL)
        {
                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;
        g_reopened = True;

        return True;
}

void
wave_out_close(void)
{
        /* Ack all remaining packets */
        while (queue_lo != queue_hi)
        {
                rdpsnd_send_completion(packet_queue[queue_lo].tick, packet_queue[queue_lo].index);
                free(packet_queue[queue_lo].s.data);
                queue_lo = (queue_lo + 1) % MAX_QUEUE;
        }

#if defined I_FLUSH && defined FLUSHW
        /* Flush the audiobuffer */
        ioctl(g_dsp_fd, I_FLUSH, FLUSHW);
#endif
        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);
        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) */
                g_swapaudio = !(*(uint8 *) (&test));
        }

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

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

        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
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;
        packet->s.p += 4;

        /* 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 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 (queue_lo == queue_hi)
                {
                        g_dsp_busy = 0;
                        return;
                }

                packet = &packet_queue[queue_lo];
                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;
                                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/audioio.h>
29
30	#define MAX_QUEUE 10
31
32	int g_dsp_fd;
33	BOOL g_dsp_busy = False;
34	static BOOL g_reopened;
35	static BOOL g_swapaudio;
36	static short g_samplewidth;
37
38	static struct audio_packet
39	{
40	struct stream s;
41	uint16 tick;
42	uint8 index;
43	} packet_queue[MAX_QUEUE];
44	static unsigned int queue_hi, queue_lo;
45
46	BOOL
47	wave_out_open(void)
48	{
49	char *dsp_dev = getenv("AUDIODEV");
50
51	if (dsp_dev == NULL)
52	{
53	dsp_dev = "/dev/audio";
54	}
55
56	if ((g_dsp_fd = open(dsp_dev, O_WRONLY \| O_NONBLOCK)) == -1)
57	{
58	perror(dsp_dev);
59	return False;
60	}
61
62	/* Non-blocking so that user interface is responsive */
63	fcntl(g_dsp_fd, F_SETFL, fcntl(g_dsp_fd, F_GETFL) \| O_NONBLOCK);
64
65	queue_lo = queue_hi = 0;
66	g_reopened = True;
67
68	return True;
69	}
70
71	void
72	wave_out_close(void)
73	{
74	/* Ack all remaining packets */
75	while (queue_lo != queue_hi)
76	{
77	rdpsnd_send_completion(packet_queue[queue_lo].tick, packet_queue[queue_lo].index);
78	free(packet_queue[queue_lo].s.data);
79	queue_lo = (queue_lo + 1) % MAX_QUEUE;
80	}
81
82	#if defined I_FLUSH && defined FLUSHW
83	/* Flush the audiobuffer */
84	ioctl(g_dsp_fd, I_FLUSH, FLUSHW);
85	#endif
86	close(g_dsp_fd);
87	}
88
89	BOOL
90	wave_out_format_supported(WAVEFORMATEX * pwfx)
91	{
92	if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
93	return False;
94	if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
95	return False;
96	if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
97	return False;
98
99	return True;
100	}
101
102	BOOL
103	wave_out_set_format(WAVEFORMATEX * pwfx)
104	{
105	audio_info_t info;
106	int test = 1;
107
108	ioctl(g_dsp_fd, AUDIO_DRAIN, 0);
109	g_swapaudio = False;
110	AUDIO_INITINFO(&info);
111
112
113	if (pwfx->wBitsPerSample == 8)
114	{
115	info.play.encoding = AUDIO_ENCODING_LINEAR8;
116	}
117	else if (pwfx->wBitsPerSample == 16)
118	{
119	info.play.encoding = AUDIO_ENCODING_LINEAR;
120	/* Do we need to swap the 16bit values? (Are we BigEndian) */
121	g_swapaudio = !((uint8 ) (&test));
122	}
123
124	g_samplewidth = pwfx->wBitsPerSample / 8;
125
126	if (pwfx->nChannels == 1)
127	{
128	info.play.channels = 1;
129	}
130	else if (pwfx->nChannels == 2)
131	{
132	info.play.channels = 2;
133	g_samplewidth *= 2;
134	}
135
136	info.play.sample_rate = pwfx->nSamplesPerSec;
137	info.play.precision = pwfx->wBitsPerSample;
138	info.play.samples = 0;
139	info.play.eof = 0;
140	info.play.error = 0;
141	g_reopened = True;
142
143	if (ioctl(g_dsp_fd, AUDIO_SETINFO, &info) == -1)
144	{
145	perror("AUDIO_SETINFO");
146	close(g_dsp_fd);
147	return False;
148	}
149
150	return True;
151	}
152
153	void
154	wave_out_volume(uint16 left, uint16 right)
155	{
156	audio_info_t info;
157	uint balance;
158	uint volume;
159
160	if (ioctl(g_dsp_fd, AUDIO_GETINFO, &info) == -1)
161	{
162	perror("AUDIO_GETINFO");
163	return;
164	}
165
166	volume = (left > right) ? left : right;
167
168	if (volume / AUDIO_MID_BALANCE != 0)
169	{
170	balance =
171	AUDIO_MID_BALANCE - (left / (volume / AUDIO_MID_BALANCE)) +
172	(right / (volume / AUDIO_MID_BALANCE));
173	}
174	else
175	{
176	balance = AUDIO_MID_BALANCE;
177	}
178
179	info.play.gain = volume / (65536 / AUDIO_MAX_GAIN);
180	info.play.balance = balance;
181
182	if (ioctl(g_dsp_fd, AUDIO_SETINFO, &info) == -1)
183	{
184	perror("AUDIO_SETINFO");
185	return;
186	}
187	}
188
189	void
190	wave_out_write(STREAM s, uint16 tick, uint8 index)
191	{
192	struct audio_packet *packet = &packet_queue[queue_hi];
193	unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;
194
195	if (next_hi == queue_lo)
196	{
197	error("No space to queue audio packet\n");
198	return;
199	}
200
201	queue_hi = next_hi;
202
203	packet->s = *s;
204	packet->tick = tick;
205	packet->index = index;
206	packet->s.p += 4;
207
208	/* we steal the data buffer from s, give it a new one */
209	s->data = malloc(s->size);
210
211	if (!g_dsp_busy)
212	wave_out_play();
213	}
214
215	void
216	wave_out_play(void)
217	{
218	struct audio_packet *packet;
219	audio_info_t info;
220	ssize_t len;
221	unsigned int i;
222	uint8 swap;
223	STREAM out;
224	static BOOL swapped = False;
225	static BOOL sentcompletion = True;
226	static uint32 samplecnt = 0;
227	static uint32 numsamples;
228
229	while (1)
230	{
231	if (g_reopened)
232	{
233	/* Device was just (re)openend */
234	samplecnt = 0;
235	swapped = False;
236	sentcompletion = True;
237	g_reopened = False;
238	}
239
240	if (queue_lo == queue_hi)
241	{
242	g_dsp_busy = 0;
243	return;
244	}
245
246	packet = &packet_queue[queue_lo];
247	out = &packet->s;
248
249	/* Swap the current packet, but only once */
250	if (g_swapaudio && !swapped)
251	{
252	for (i = 0; i < out->end - out->p; i += 2)
253	{
254	swap = *(out->p + i);
255	(out->p + i) = (out->p + i + 1);
256	*(out->p + i + 1) = swap;
257	}
258	swapped = True;
259	}
260
261	if (sentcompletion)
262	{
263	sentcompletion = False;
264	numsamples = (out->end - out->p) / g_samplewidth;
265	}
266
267	len = 0;
268
269	if (out->end != out->p)
270	{
271	len = write(g_dsp_fd, out->p, out->end - out->p);
272	if (len == -1)
273	{
274	if (errno != EWOULDBLOCK)
275	perror("write audio");
276	g_dsp_busy = 1;
277	return;
278	}
279	}
280
281	out->p += len;
282	if (out->p == out->end)
283	{
284	if (ioctl(g_dsp_fd, AUDIO_GETINFO, &info) == -1)
285	{
286	perror("AUDIO_GETINFO");
287	return;
288	}
289
290	/* Ack the packet, if we have played at least 70% */
291	if (info.play.samples >= samplecnt + ((numsamples * 7) / 10))
292	{
293	samplecnt += numsamples;
294	rdpsnd_send_completion(packet->tick, packet->index);
295	free(out->data);
296	queue_lo = (queue_lo + 1) % MAX_QUEUE;
297	swapped = False;
298	sentcompletion = True;
299	}
300	else
301	{
302	g_dsp_busy = 1;
303	return;
304	}
305	}
306	}
307	}