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>
#include <stropts.h>

#define MAX_QUEUE       10

int g_dsp_fd;
BOOL g_dsp_busy = False;
static BOOL reopened;
static BOOL swapaudio;
static short 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;
        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;
        }

        /* Flush the audiobuffer */
        ioctl(g_dsp_fd, I_FLUSH, FLUSHW);
        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);
        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) */
                swapaudio = !(*(uint8 *) (&test));
        }

        samplewidth = pwfx->wBitsPerSample / 8;

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