trunk/rdesktop/rdpsnd_oss.c

/* 
   rdesktop: A Remote Desktop Protocol client.
   Sound Channel Process Functions - Open Sound System
   Copyright (C) Matthew Chapman 2003
   Copyright (C) GuoJunBo guojunbo@ict.ac.cn 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/time.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>

#define MAX_QUEUE       10

int g_dsp_fd;
BOOL g_dsp_busy = False;
static int g_snd_rate;
static short g_samplewidth;
static BOOL g_driver_broken = False;

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/dsp";
        }

        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);
        return True;
}

void
wave_out_close(void)
{
        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)
{
        int stereo, format, fragments;

        ioctl(g_dsp_fd, SNDCTL_DSP_RESET, NULL);
        ioctl(g_dsp_fd, SNDCTL_DSP_SYNC, NULL);

        if (pwfx->wBitsPerSample == 8)
                format = AFMT_U8;
        else if (pwfx->wBitsPerSample == 16)
                format = AFMT_S16_LE;

        g_samplewidth = pwfx->wBitsPerSample / 8;

        if (ioctl(g_dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1)
        {
                perror("SNDCTL_DSP_SETFMT");
                close(g_dsp_fd);
                return False;
        }

        if (pwfx->nChannels == 2)
        {
                stereo = 1;
                g_samplewidth *= 2;
        }
        else
        {
                stereo = 0;
        }

        if (ioctl(g_dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1)
        {
                perror("SNDCTL_DSP_CHANNELS");
                close(g_dsp_fd);
                return False;
        }

        g_snd_rate = pwfx->nSamplesPerSec;
        if (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, &g_snd_rate) == -1)
        {
                perror("SNDCTL_DSP_SPEED");
                close(g_dsp_fd);
                return False;
        }

        /* try to get 7 fragments of 2^12 bytes size */
        fragments = (7 << 16) + 12;
        ioctl(g_dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments);

        if (!g_driver_broken)
        {
                audio_buf_info info;

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

                if (info.fragments == 0 || info.fragstotal == 0 || info.fragsize == 0)
                {
                        fprintf(stderr,
                                "Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n",
                                info.fragments, info.fragstotal, info.fragsize);
                        g_driver_broken = True;
                }
        }

        return True;
}

void
wave_out_volume(uint16 left, uint16 right)
{
        static BOOL use_dev_mixer = False;
        uint32 volume;
        int fd_mix = -1;

        volume = left / (65536 / 100);
        volume |= right / (65536 / 100) << 8;

        if (use_dev_mixer)
        {
                if ((fd_mix = open("/dev/mixer", O_RDWR | O_NONBLOCK)) == -1)
                {
                        perror("open /dev/mixer");
                        return;
                }

                if (ioctl(fd_mix, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
                {
                        perror("MIXER_WRITE(SOUND_MIXER_PCM)");
                        return;
                }

                close(fd_mix);
        }

        if (ioctl(g_dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
        {
                perror("MIXER_WRITE(SOUND_MIXER_PCM)");
                use_dev_mixer = True;
                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;
        ssize_t len;
        STREAM out;
        static long startedat_us;
        static long startedat_s;
        static BOOL started = False;
        struct timeval tv;
        audio_buf_info info;

        while (1)
        {
                if (queue_lo == queue_hi)
                {
                        g_dsp_busy = 0;
                        return;
                }

                packet = &packet_queue[queue_lo];
                out = &packet->s;

                if (!started)
                {
                        gettimeofday(&tv, NULL);
                        startedat_us = tv.tv_usec;
                        startedat_s = tv.tv_sec;
                        started = True;
                }

                len = out->end - out->p;

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

                        if (info.fragments == 0)
                        {
                                g_dsp_busy = 1;
                                return;
                        }

                        if (info.fragments * info.fragsize < len
                            && info.fragments * info.fragsize > 0)
                        {
                                len = info.fragments * info.fragsize;
                        }
                }


                len = write(g_dsp_fd, out->p, len);
                if (len == -1)
                {
                        if (errno != EWOULDBLOCK)
                                perror("write audio");
                        g_dsp_busy = 1;
                        return;
                }

                out->p += len;
                if (out->p == out->end)
                {
                        long long duration;
                        long elapsed;

                        gettimeofday(&tv, NULL);
                        duration = (out->size * (1000000 / (g_samplewidth * g_snd_rate)));
                        elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us);

                        if (elapsed >= (duration * 85) / 100)
                        {
                                rdpsnd_send_completion(packet->tick, packet->index);
                                free(out->data);
                                queue_lo = (queue_lo + 1) % MAX_QUEUE;
                                started = False;
                        }
                        else
                        {
                                g_dsp_busy = 1;
                                return;
                        }
                }
        }
}
1	/*
2	rdesktop: A Remote Desktop Protocol client.
3	Sound Channel Process Functions - Open Sound System
4	Copyright (C) Matthew Chapman 2003
5	Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
6
7	This program is free software; you can redistribute it and/or modify
8	it under the terms of the GNU General Public License as published by
9	the Free Software Foundation; either version 2 of the License, or
10	(at your option) any later version.
11
12	This program is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License for more details.
16
17	You should have received a copy of the GNU General Public License
18	along with this program; if not, write to the Free Software
19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20	*/
21
22	#include "rdesktop.h"
23	#include <unistd.h>
24	#include <fcntl.h>
25	#include <errno.h>
26	#include <sys/time.h>
27	#include <sys/ioctl.h>
28	#include <sys/soundcard.h>
29
30	#define MAX_QUEUE 10
31
32	int g_dsp_fd;
33	BOOL g_dsp_busy = False;
34	static int g_snd_rate;
35	static short g_samplewidth;
36	static BOOL g_driver_broken = False;
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/dsp";
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	return True;
65	}
66
67	void
68	wave_out_close(void)
69	{
70	close(g_dsp_fd);
71	}
72
73	BOOL
74	wave_out_format_supported(WAVEFORMATEX * pwfx)
75	{
76	if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
77	return False;
78	if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
79	return False;
80	if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
81	return False;
82
83	return True;
84	}
85
86	BOOL
87	wave_out_set_format(WAVEFORMATEX * pwfx)
88	{
89	int stereo, format, fragments;
90
91	ioctl(g_dsp_fd, SNDCTL_DSP_RESET, NULL);
92	ioctl(g_dsp_fd, SNDCTL_DSP_SYNC, NULL);
93
94	if (pwfx->wBitsPerSample == 8)
95	format = AFMT_U8;
96	else if (pwfx->wBitsPerSample == 16)
97	format = AFMT_S16_LE;
98
99	g_samplewidth = pwfx->wBitsPerSample / 8;
100
101	if (ioctl(g_dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1)
102	{
103	perror("SNDCTL_DSP_SETFMT");
104	close(g_dsp_fd);
105	return False;
106	}
107
108	if (pwfx->nChannels == 2)
109	{
110	stereo = 1;
111	g_samplewidth *= 2;
112	}
113	else
114	{
115	stereo = 0;
116	}
117
118	if (ioctl(g_dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1)
119	{
120	perror("SNDCTL_DSP_CHANNELS");
121	close(g_dsp_fd);
122	return False;
123	}
124
125	g_snd_rate = pwfx->nSamplesPerSec;
126	if (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, &g_snd_rate) == -1)
127	{
128	perror("SNDCTL_DSP_SPEED");
129	close(g_dsp_fd);
130	return False;
131	}
132
133	/* try to get 7 fragments of 2^12 bytes size */
134	fragments = (7 << 16) + 12;
135	ioctl(g_dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments);
136
137	if (!g_driver_broken)
138	{
139	audio_buf_info info;
140
141	if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
142	{
143	perror("SNDCTL_DSP_GETOSPACE");
144	close(g_dsp_fd);
145	return False;
146	}
147
148	if (info.fragments == 0 \|\| info.fragstotal == 0 \|\| info.fragsize == 0)
149	{
150	fprintf(stderr,
151	"Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n",
152	info.fragments, info.fragstotal, info.fragsize);
153	g_driver_broken = True;
154	}
155	}
156
157	return True;
158	}
159
160	void
161	wave_out_volume(uint16 left, uint16 right)
162	{
163	static BOOL use_dev_mixer = False;
164	uint32 volume;
165	int fd_mix = -1;
166
167	volume = left / (65536 / 100);
168	volume \|= right / (65536 / 100) << 8;
169
170	if (use_dev_mixer)
171	{
172	if ((fd_mix = open("/dev/mixer", O_RDWR \| O_NONBLOCK)) == -1)
173	{
174	perror("open /dev/mixer");
175	return;
176	}
177
178	if (ioctl(fd_mix, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
179	{
180	perror("MIXER_WRITE(SOUND_MIXER_PCM)");
181	return;
182	}
183
184	close(fd_mix);
185	}
186
187	if (ioctl(g_dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
188	{
189	perror("MIXER_WRITE(SOUND_MIXER_PCM)");
190	use_dev_mixer = True;
191	return;
192	}
193	}
194
195	void
196	wave_out_write(STREAM s, uint16 tick, uint8 index)
197	{
198	struct audio_packet *packet = &packet_queue[queue_hi];
199	unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;
200
201	if (next_hi == queue_lo)
202	{
203	error("No space to queue audio packet\n");
204	return;
205	}
206
207	queue_hi = next_hi;
208
209	packet->s = *s;
210	packet->tick = tick;
211	packet->index = index;
212	packet->s.p += 4;
213
214	/* we steal the data buffer from s, give it a new one */
215	s->data = malloc(s->size);
216
217	if (!g_dsp_busy)
218	wave_out_play();
219	}
220
221	void
222	wave_out_play(void)
223	{
224	struct audio_packet *packet;
225	ssize_t len;
226	STREAM out;
227	static long startedat_us;
228	static long startedat_s;
229	static BOOL started = False;
230	struct timeval tv;
231	audio_buf_info info;
232
233	while (1)
234	{
235	if (queue_lo == queue_hi)
236	{
237	g_dsp_busy = 0;
238	return;
239	}
240
241	packet = &packet_queue[queue_lo];
242	out = &packet->s;
243
244	if (!started)
245	{
246	gettimeofday(&tv, NULL);
247	startedat_us = tv.tv_usec;
248	startedat_s = tv.tv_sec;
249	started = True;
250	}
251
252	len = out->end - out->p;
253
254	if (!g_driver_broken)
255	{
256	if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
257	{
258	perror("SNDCTL_DSP_GETOSPACE");
259	return;
260	}
261
262	if (info.fragments == 0)
263	{
264	g_dsp_busy = 1;
265	return;
266	}
267
268	if (info.fragments * info.fragsize < len
269	&& info.fragments * info.fragsize > 0)
270	{
271	len = info.fragments * info.fragsize;
272	}
273	}
274
275
276	len = write(g_dsp_fd, out->p, len);
277	if (len == -1)
278	{
279	if (errno != EWOULDBLOCK)
280	perror("write audio");
281	g_dsp_busy = 1;
282	return;
283	}
284
285	out->p += len;
286	if (out->p == out->end)
287	{
288	long long duration;
289	long elapsed;
290
291	gettimeofday(&tv, NULL);
292	duration = (out->size * (1000000 / (g_samplewidth * g_snd_rate)));
293	elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us);
294
295	if (elapsed >= (duration * 85) / 100)
296	{
297	rdpsnd_send_completion(packet->tick, packet->index);
298	free(out->data);
299	queue_lo = (queue_lo + 1) % MAX_QUEUE;
300	started = False;
301	}
302	else
303	{
304	g_dsp_busy = 1;
305	return;
306	}
307	}
308	}
309	}