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 = strdup("/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;

                memset(&info, 0, sizeof(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 = (uint8 *) 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)
                {
                        memset(&info, 0, sizeof(info));
                        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	jsorg71	778	/*
2	matthewc	475	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	stargo	510	#include <sys/time.h>
27	matthewc	475	#include <sys/ioctl.h>
28			#include <sys/soundcard.h>
29
30			#define MAX_QUEUE 10
31
32			int g_dsp_fd;
33	stargo	504	BOOL g_dsp_busy = False;
34	stargo	510	static int g_snd_rate;
35			static short g_samplewidth;
36	stargo	761	static BOOL g_driver_broken = False;
37	matthewc	475
38	astrand	499	static struct audio_packet
39			{
40	matthewc	475	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	stargo	751	char *dsp_dev = getenv("AUDIODEV");
50	matthewc	475
51	stargo	751	if (dsp_dev == NULL)
52			{
53	stargo	794	dsp_dev = strdup("/dev/dsp");
54	stargo	751	}
55
56	astrand	499	if ((g_dsp_fd = open(dsp_dev, O_WRONLY \| O_NONBLOCK)) == -1)
57	matthewc	475	{
58			perror(dsp_dev);
59			return False;
60			}
61
62			/* Non-blocking so that user interface is responsive */
63	astrand	499	fcntl(g_dsp_fd, F_SETFL, fcntl(g_dsp_fd, F_GETFL) \| O_NONBLOCK);
64	matthewc	475	return True;
65			}
66
67			void
68			wave_out_close(void)
69			{
70			close(g_dsp_fd);
71			}
72
73			BOOL
74	astrand	499	wave_out_format_supported(WAVEFORMATEX * pwfx)
75	matthewc	475	{
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	astrand	499	wave_out_set_format(WAVEFORMATEX * pwfx)
88	matthewc	475	{
89	stargo	761	int stereo, format, fragments;
90	matthewc	475
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	stargo	510	g_samplewidth = pwfx->wBitsPerSample / 8;
100
101	matthewc	475	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	stargo	760	if (pwfx->nChannels == 2)
109	matthewc	475	{
110	stargo	760	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	matthewc	475	perror("SNDCTL_DSP_CHANNELS");
121			close(g_dsp_fd);
122			return False;
123			}
124
125	stargo	510	g_snd_rate = pwfx->nSamplesPerSec;
126			if (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, &g_snd_rate) == -1)
127			{
128	matthewc	475	perror("SNDCTL_DSP_SPEED");
129			close(g_dsp_fd);
130			return False;
131			}
132
133	stargo	761	/* 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	astrand	801	memset(&info, 0, sizeof(info));
142	stargo	761	if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
143			{
144			perror("SNDCTL_DSP_GETOSPACE");
145			close(g_dsp_fd);
146			return False;
147			}
148
149			if (info.fragments == 0 \|\| info.fragstotal == 0 \|\| info.fragsize == 0)
150			{
151			fprintf(stderr,
152			"Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n",
153			info.fragments, info.fragstotal, info.fragsize);
154			g_driver_broken = True;
155			}
156			}
157
158	matthewc	475	return True;
159			}
160
161			void
162	stargo	491	wave_out_volume(uint16 left, uint16 right)
163			{
164	stargo	509	static BOOL use_dev_mixer = False;
165	stargo	491	uint32 volume;
166	stargo	509	int fd_mix = -1;
167	stargo	491
168	astrand	499	volume = left / (65536 / 100);
169			volume \|= right / (65536 / 100) << 8;
170	stargo	509
171			if (use_dev_mixer)
172			{
173	astrand	532	if ((fd_mix = open("/dev/mixer", O_RDWR \| O_NONBLOCK)) == -1)
174	stargo	509	{
175			perror("open /dev/mixer");
176			return;
177			}
178
179			if (ioctl(fd_mix, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
180			{
181			perror("MIXER_WRITE(SOUND_MIXER_PCM)");
182			return;
183			}
184
185			close(fd_mix);
186			}
187
188	stargo	491	if (ioctl(g_dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
189			{
190			perror("MIXER_WRITE(SOUND_MIXER_PCM)");
191	stargo	509	use_dev_mixer = True;
192	stargo	491	return;
193			}
194			}
195
196			void
197	matthewc	475	wave_out_write(STREAM s, uint16 tick, uint8 index)
198			{
199	matthewc	476	struct audio_packet *packet = &packet_queue[queue_hi];
200			unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;
201	matthewc	475
202			if (next_hi == queue_lo)
203			{
204			error("No space to queue audio packet\n");
205			return;
206			}
207
208			queue_hi = next_hi;
209
210			packet->s = *s;
211			packet->tick = tick;
212			packet->index = index;
213	stargo	491	packet->s.p += 4;
214	matthewc	475
215			/* we steal the data buffer from s, give it a new one */
216	jsorg71	778	s->data = (uint8 *) malloc(s->size);
217	matthewc	475
218			if (!g_dsp_busy)
219			wave_out_play();
220			}
221
222			void
223			wave_out_play(void)
224			{
225			struct audio_packet *packet;
226			ssize_t len;
227			STREAM out;
228	stargo	510	static long startedat_us;
229			static long startedat_s;
230			static BOOL started = False;
231			struct timeval tv;
232	stargo	761	audio_buf_info info;
233	matthewc	475
234			while (1)
235			{
236			if (queue_lo == queue_hi)
237			{
238			g_dsp_busy = 0;
239			return;
240			}
241
242			packet = &packet_queue[queue_lo];
243			out = &packet->s;
244
245	stargo	510	if (!started)
246			{
247			gettimeofday(&tv, NULL);
248			startedat_us = tv.tv_usec;
249			startedat_s = tv.tv_sec;
250			started = True;
251			}
252
253	stargo	761	len = out->end - out->p;
254
255			if (!g_driver_broken)
256			{
257	astrand	801	memset(&info, 0, sizeof(info));
258	stargo	761	if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
259			{
260			perror("SNDCTL_DSP_GETOSPACE");
261			return;
262			}
263
264			if (info.fragments == 0)
265			{
266			g_dsp_busy = 1;
267			return;
268			}
269
270			if (info.fragments * info.fragsize < len
271			&& info.fragments * info.fragsize > 0)
272			{
273			len = info.fragments * info.fragsize;
274			}
275			}
276
277
278			len = write(g_dsp_fd, out->p, len);
279	matthewc	475	if (len == -1)
280			{
281			if (errno != EWOULDBLOCK)
282			perror("write audio");
283			g_dsp_busy = 1;
284			return;
285			}
286
287			out->p += len;
288			if (out->p == out->end)
289			{
290	stargo	510	long long duration;
291			long elapsed;
292	astrand	532
293	stargo	510	gettimeofday(&tv, NULL);
294	astrand	532	duration = (out->size * (1000000 / (g_samplewidth * g_snd_rate)));
295			elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us);
296	stargo	510
297	stargo	753	if (elapsed >= (duration * 85) / 100)
298	stargo	510	{
299			rdpsnd_send_completion(packet->tick, packet->index);
300			free(out->data);
301			queue_lo = (queue_lo + 1) % MAX_QUEUE;
302			started = False;
303			}
304			else
305			{
306			g_dsp_busy = 1;
307			return;
308			}
309	matthewc	475	}
310			}
311			}