trunk/rdesktop/rdpsnd_oss.c

/* -*- c-basic-offset: 8 -*-
   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.
*/

/* 
   This is a workaround for Esound bug 312665. 
   FIXME: Remove this when Esound is fixed. 
*/
#ifdef _FILE_OFFSET_BITS
#undef _FILE_OFFSET_BITS
#endif

#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 = xstrdup("/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	astrand	963	/* -- c-basic-offset: 8 --
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	astrand	1227	/*
23			This is a workaround for Esound bug 312665.
24			FIXME: Remove this when Esound is fixed.
25			*/
26			#ifdef _FILE_OFFSET_BITS
27			#undef _FILE_OFFSET_BITS
28			#endif
29
30	matthewc	475	#include "rdesktop.h"
31			#include <unistd.h>
32			#include <fcntl.h>
33			#include <errno.h>
34	stargo	510	#include <sys/time.h>
35	matthewc	475	#include <sys/ioctl.h>
36			#include <sys/soundcard.h>
37
38			#define MAX_QUEUE 10
39
40			int g_dsp_fd;
41	stargo	504	BOOL g_dsp_busy = False;
42	stargo	510	static int g_snd_rate;
43			static short g_samplewidth;
44	stargo	761	static BOOL g_driver_broken = False;
45	matthewc	475
46	astrand	499	static struct audio_packet
47			{
48	matthewc	475	struct stream s;
49			uint16 tick;
50			uint8 index;
51			} packet_queue[MAX_QUEUE];
52			static unsigned int queue_hi, queue_lo;
53
54			BOOL
55			wave_out_open(void)
56			{
57	stargo	751	char *dsp_dev = getenv("AUDIODEV");
58	matthewc	475
59	stargo	751	if (dsp_dev == NULL)
60			{
61	astrand	974	dsp_dev = xstrdup("/dev/dsp");
62	stargo	751	}
63
64	astrand	499	if ((g_dsp_fd = open(dsp_dev, O_WRONLY \| O_NONBLOCK)) == -1)
65	matthewc	475	{
66			perror(dsp_dev);
67			return False;
68			}
69
70			/* Non-blocking so that user interface is responsive */
71	astrand	499	fcntl(g_dsp_fd, F_SETFL, fcntl(g_dsp_fd, F_GETFL) \| O_NONBLOCK);
72	matthewc	475	return True;
73			}
74
75			void
76			wave_out_close(void)
77			{
78			close(g_dsp_fd);
79			}
80
81			BOOL
82	astrand	499	wave_out_format_supported(WAVEFORMATEX * pwfx)
83	matthewc	475	{
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	astrand	499	wave_out_set_format(WAVEFORMATEX * pwfx)
96	matthewc	475	{
97	stargo	761	int stereo, format, fragments;
98	matthewc	475
99			ioctl(g_dsp_fd, SNDCTL_DSP_RESET, NULL);
100			ioctl(g_dsp_fd, SNDCTL_DSP_SYNC, NULL);
101
102			if (pwfx->wBitsPerSample == 8)
103			format = AFMT_U8;
104			else if (pwfx->wBitsPerSample == 16)
105			format = AFMT_S16_LE;
106
107	stargo	510	g_samplewidth = pwfx->wBitsPerSample / 8;
108
109	matthewc	475	if (ioctl(g_dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1)
110			{
111			perror("SNDCTL_DSP_SETFMT");
112			close(g_dsp_fd);
113			return False;
114			}
115
116	stargo	760	if (pwfx->nChannels == 2)
117	matthewc	475	{
118	stargo	760	stereo = 1;
119			g_samplewidth *= 2;
120			}
121			else
122			{
123			stereo = 0;
124			}
125
126			if (ioctl(g_dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1)
127			{
128	matthewc	475	perror("SNDCTL_DSP_CHANNELS");
129			close(g_dsp_fd);
130			return False;
131			}
132
133	stargo	510	g_snd_rate = pwfx->nSamplesPerSec;
134			if (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, &g_snd_rate) == -1)
135			{
136	matthewc	475	perror("SNDCTL_DSP_SPEED");
137			close(g_dsp_fd);
138			return False;
139			}
140
141	stargo	761	/* try to get 7 fragments of 2^12 bytes size */
142			fragments = (7 << 16) + 12;
143			ioctl(g_dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments);
144
145			if (!g_driver_broken)
146			{
147			audio_buf_info info;
148
149	astrand	801	memset(&info, 0, sizeof(info));
150	stargo	761	if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
151			{
152			perror("SNDCTL_DSP_GETOSPACE");
153			close(g_dsp_fd);
154			return False;
155			}
156
157			if (info.fragments == 0 \|\| info.fragstotal == 0 \|\| info.fragsize == 0)
158			{
159			fprintf(stderr,
160			"Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n",
161			info.fragments, info.fragstotal, info.fragsize);
162			g_driver_broken = True;
163			}
164			}
165
166	matthewc	475	return True;
167			}
168
169			void
170	stargo	491	wave_out_volume(uint16 left, uint16 right)
171			{
172	stargo	509	static BOOL use_dev_mixer = False;
173	stargo	491	uint32 volume;
174	stargo	509	int fd_mix = -1;
175	stargo	491
176	astrand	499	volume = left / (65536 / 100);
177			volume \|= right / (65536 / 100) << 8;
178	stargo	509
179			if (use_dev_mixer)
180			{
181	astrand	532	if ((fd_mix = open("/dev/mixer", O_RDWR \| O_NONBLOCK)) == -1)
182	stargo	509	{
183			perror("open /dev/mixer");
184			return;
185			}
186
187			if (ioctl(fd_mix, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
188			{
189			perror("MIXER_WRITE(SOUND_MIXER_PCM)");
190			return;
191			}
192
193			close(fd_mix);
194			}
195
196	stargo	491	if (ioctl(g_dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
197			{
198			perror("MIXER_WRITE(SOUND_MIXER_PCM)");
199	stargo	509	use_dev_mixer = True;
200	stargo	491	return;
201			}
202			}
203
204			void
205	matthewc	475	wave_out_write(STREAM s, uint16 tick, uint8 index)
206			{
207	matthewc	476	struct audio_packet *packet = &packet_queue[queue_hi];
208			unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;
209	matthewc	475
210			if (next_hi == queue_lo)
211			{
212			error("No space to queue audio packet\n");
213			return;
214			}
215
216			queue_hi = next_hi;
217
218			packet->s = *s;
219			packet->tick = tick;
220			packet->index = index;
221	stargo	491	packet->s.p += 4;
222	matthewc	475
223			/* we steal the data buffer from s, give it a new one */
224	jsorg71	778	s->data = (uint8 *) malloc(s->size);
225	matthewc	475
226			if (!g_dsp_busy)
227			wave_out_play();
228			}
229
230			void
231			wave_out_play(void)
232			{
233			struct audio_packet *packet;
234			ssize_t len;
235			STREAM out;
236	stargo	510	static long startedat_us;
237			static long startedat_s;
238			static BOOL started = False;
239			struct timeval tv;
240	stargo	761	audio_buf_info info;
241	matthewc	475
242			while (1)
243			{
244			if (queue_lo == queue_hi)
245			{
246			g_dsp_busy = 0;
247			return;
248			}
249
250			packet = &packet_queue[queue_lo];
251			out = &packet->s;
252
253	stargo	510	if (!started)
254			{
255			gettimeofday(&tv, NULL);
256			startedat_us = tv.tv_usec;
257			startedat_s = tv.tv_sec;
258			started = True;
259			}
260
261	stargo	761	len = out->end - out->p;
262
263			if (!g_driver_broken)
264			{
265	astrand	801	memset(&info, 0, sizeof(info));
266	stargo	761	if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
267			{
268			perror("SNDCTL_DSP_GETOSPACE");
269			return;
270			}
271
272			if (info.fragments == 0)
273			{
274			g_dsp_busy = 1;
275			return;
276			}
277
278			if (info.fragments * info.fragsize < len
279			&& info.fragments * info.fragsize > 0)
280			{
281			len = info.fragments * info.fragsize;
282			}
283			}
284
285
286			len = write(g_dsp_fd, out->p, len);
287	matthewc	475	if (len == -1)
288			{
289			if (errno != EWOULDBLOCK)
290			perror("write audio");
291			g_dsp_busy = 1;
292			return;
293			}
294
295			out->p += len;
296			if (out->p == out->end)
297			{
298	stargo	510	long long duration;
299			long elapsed;
300	astrand	532
301	stargo	510	gettimeofday(&tv, NULL);
302	astrand	532	duration = (out->size * (1000000 / (g_samplewidth * g_snd_rate)));
303			elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us);
304	stargo	510
305	stargo	753	if (elapsed >= (duration * 85) / 100)
306	stargo	510	{
307			rdpsnd_send_completion(packet->tick, packet->index);
308			free(out->data);
309			queue_lo = (queue_lo + 1) % MAX_QUEUE;
310			started = False;
311			}
312			else
313			{
314			g_dsp_busy = 1;
315			return;
316			}
317	matthewc	475	}
318			}
319			}