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 "rdpsnd.h"
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>

#define DEFAULTDEVICE   "/dev/dsp"
#define MAX_LEN         512

static int snd_rate;
static short samplewidth;
static char *dsp_dev;

BOOL
oss_open(void)
{
        if ((g_dsp_fd = open(dsp_dev, O_WRONLY)) == -1)
        {
                perror(dsp_dev);
                return False;
        }

        return True;
}

void
oss_close(void)
{
        close(g_dsp_fd);
}

BOOL
oss_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
oss_set_format(WAVEFORMATEX * pwfx)
{
        int stereo, format, fragments;
        static BOOL driver_broken = False;

        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;

        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;
                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;
        }

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

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

        if (!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);
                        driver_broken = True;
                }
        }

        return True;
}

void
oss_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
oss_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;

        if (rdpsnd_queue_empty())
        {
                g_dsp_busy = 0;
                return;
        }

        packet = rdpsnd_queue_current_packet();
        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;

        len = write(g_dsp_fd, out->p, (len > MAX_LEN) ? MAX_LEN : 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 / (samplewidth * snd_rate)));
                elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us);

                if (elapsed >= (duration * 85) / 100)
                {
                        /* We need to add 50 to tell windows that time has passed while
                         * playing this packet */
                        rdpsnd_send_completion(packet->tick + 50, packet->index);
                        rdpsnd_queue_next();
                        started = False;
                }
                else
                {
                        g_dsp_busy = 1;
                        return;
                }
        }
        g_dsp_busy = 1;
        return;
}

struct audio_driver *
oss_register(char *options)
{
        static struct audio_driver oss_driver;

        oss_driver.wave_out_write = rdpsnd_queue_write;
        oss_driver.wave_out_open = oss_open;
        oss_driver.wave_out_close = oss_close;
        oss_driver.wave_out_format_supported = oss_format_supported;
        oss_driver.wave_out_set_format = oss_set_format;
        oss_driver.wave_out_volume = oss_volume;
        oss_driver.wave_out_play = oss_play;
        oss_driver.name = xstrdup("oss");
        oss_driver.description =
                xstrdup("OSS output driver, default device: " DEFAULTDEVICE " or $AUDIODEV");
        oss_driver.need_byteswap_on_be = 0;
        oss_driver.next = NULL;

        if (options)
        {
                dsp_dev = xstrdup(options);
        }
        else
        {
                dsp_dev = getenv("AUDIODEV");

                if (dsp_dev == NULL)
                {
                        dsp_dev = xstrdup(DEFAULTDEVICE);
                }
        }

        return &oss_driver;
}
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	stargo	1254	#include "rdpsnd.h"
32	matthewc	475	#include <unistd.h>
33			#include <fcntl.h>
34			#include <errno.h>
35	stargo	510	#include <sys/time.h>
36	matthewc	475	#include <sys/ioctl.h>
37			#include <sys/soundcard.h>
38
39	stargo	1254	#define DEFAULTDEVICE "/dev/dsp"
40	stargo	1247	#define MAX_LEN 512
41	matthewc	475
42	stargo	1247	static int snd_rate;
43			static short samplewidth;
44	stargo	1255	static char *dsp_dev;
45	matthewc	475
46			BOOL
47	stargo	1255	oss_open(void)
48	matthewc	475	{
49	stargo	1247	if ((g_dsp_fd = open(dsp_dev, O_WRONLY)) == -1)
50	matthewc	475	{
51			perror(dsp_dev);
52			return False;
53			}
54
55			return True;
56			}
57
58			void
59	stargo	1255	oss_close(void)
60	matthewc	475	{
61			close(g_dsp_fd);
62			}
63
64			BOOL
65	stargo	1255	oss_format_supported(WAVEFORMATEX * pwfx)
66	matthewc	475	{
67			if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
68			return False;
69			if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
70			return False;
71			if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
72			return False;
73
74			return True;
75			}
76
77			BOOL
78	stargo	1255	oss_set_format(WAVEFORMATEX * pwfx)
79	matthewc	475	{
80	stargo	761	int stereo, format, fragments;
81	stargo	1247	static BOOL driver_broken = False;
82	matthewc	475
83			ioctl(g_dsp_fd, SNDCTL_DSP_RESET, NULL);
84			ioctl(g_dsp_fd, SNDCTL_DSP_SYNC, NULL);
85
86			if (pwfx->wBitsPerSample == 8)
87			format = AFMT_U8;
88			else if (pwfx->wBitsPerSample == 16)
89			format = AFMT_S16_LE;
90
91	stargo	1247	samplewidth = pwfx->wBitsPerSample / 8;
92	stargo	510
93	matthewc	475	if (ioctl(g_dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1)
94			{
95			perror("SNDCTL_DSP_SETFMT");
96			close(g_dsp_fd);
97			return False;
98			}
99
100	stargo	760	if (pwfx->nChannels == 2)
101	matthewc	475	{
102	stargo	760	stereo = 1;
103	stargo	1247	samplewidth *= 2;
104	stargo	760	}
105			else
106			{
107			stereo = 0;
108			}
109
110			if (ioctl(g_dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1)
111			{
112	matthewc	475	perror("SNDCTL_DSP_CHANNELS");
113			close(g_dsp_fd);
114			return False;
115			}
116
117	stargo	1247	snd_rate = pwfx->nSamplesPerSec;
118			if (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, &snd_rate) == -1)
119	stargo	510	{
120	matthewc	475	perror("SNDCTL_DSP_SPEED");
121			close(g_dsp_fd);
122			return False;
123			}
124
125	stargo	1247	/* try to get 12 fragments of 2^12 bytes size */
126			fragments = (12 << 16) + 12;
127	stargo	761	ioctl(g_dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments);
128
129	stargo	1247	if (!driver_broken)
130	stargo	761	{
131			audio_buf_info info;
132
133	astrand	801	memset(&info, 0, sizeof(info));
134	stargo	761	if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
135			{
136			perror("SNDCTL_DSP_GETOSPACE");
137			close(g_dsp_fd);
138			return False;
139			}
140
141			if (info.fragments == 0 \|\| info.fragstotal == 0 \|\| info.fragsize == 0)
142			{
143			fprintf(stderr,
144			"Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n",
145			info.fragments, info.fragstotal, info.fragsize);
146	stargo	1247	driver_broken = True;
147	stargo	761	}
148			}
149
150	matthewc	475	return True;
151			}
152
153			void
154	stargo	1255	oss_volume(uint16 left, uint16 right)
155	stargo	491	{
156	stargo	509	static BOOL use_dev_mixer = False;
157	stargo	491	uint32 volume;
158	stargo	509	int fd_mix = -1;
159	stargo	491
160	astrand	499	volume = left / (65536 / 100);
161			volume \|= right / (65536 / 100) << 8;
162	stargo	509
163			if (use_dev_mixer)
164			{
165	astrand	532	if ((fd_mix = open("/dev/mixer", O_RDWR \| O_NONBLOCK)) == -1)
166	stargo	509	{
167			perror("open /dev/mixer");
168			return;
169			}
170
171			if (ioctl(fd_mix, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
172			{
173			perror("MIXER_WRITE(SOUND_MIXER_PCM)");
174			return;
175			}
176
177			close(fd_mix);
178			}
179
180	stargo	491	if (ioctl(g_dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
181			{
182			perror("MIXER_WRITE(SOUND_MIXER_PCM)");
183	stargo	509	use_dev_mixer = True;
184	stargo	491	return;
185			}
186			}
187
188			void
189	stargo	1255	oss_play(void)
190	matthewc	475	{
191			struct audio_packet *packet;
192			ssize_t len;
193			STREAM out;
194	stargo	510	static long startedat_us;
195			static long startedat_s;
196			static BOOL started = False;
197			struct timeval tv;
198	matthewc	475
199	stargo	1254	if (rdpsnd_queue_empty())
200	matthewc	475	{
201	stargo	1247	g_dsp_busy = 0;
202			return;
203			}
204	matthewc	475
205	stargo	1254	packet = rdpsnd_queue_current_packet();
206	stargo	1247	out = &packet->s;
207	matthewc	475
208	stargo	1247	if (!started)
209			{
210			gettimeofday(&tv, NULL);
211			startedat_us = tv.tv_usec;
212			startedat_s = tv.tv_sec;
213			started = True;
214			}
215	stargo	510
216	stargo	1247	len = out->end - out->p;
217	stargo	761
218	stargo	1247	len = write(g_dsp_fd, out->p, (len > MAX_LEN) ? MAX_LEN : len);
219			if (len == -1)
220			{
221			if (errno != EWOULDBLOCK)
222			perror("write audio");
223			g_dsp_busy = 1;
224			return;
225			}
226	stargo	761
227	stargo	1247	out->p += len;
228			if (out->p == out->end)
229			{
230			long long duration;
231			long elapsed;
232	stargo	761
233	stargo	1247	gettimeofday(&tv, NULL);
234			duration = (out->size * (1000000 / (samplewidth * snd_rate)));
235			elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us);
236	stargo	761
237	stargo	1247	if (elapsed >= (duration * 85) / 100)
238	matthewc	475	{
239	stargo	1254	/* We need to add 50 to tell windows that time has passed while
240			* playing this packet */
241			rdpsnd_send_completion(packet->tick + 50, packet->index);
242			rdpsnd_queue_next();
243	stargo	1247	started = False;
244			}
245			else
246			{
247	matthewc	475	g_dsp_busy = 1;
248			return;
249			}
250			}
251	stargo	1247	g_dsp_busy = 1;
252			return;
253	matthewc	475	}
254	stargo	1255
255			struct audio_driver *
256			oss_register(char *options)
257			{
258	stargo	1256	static struct audio_driver oss_driver;
259
260			oss_driver.wave_out_write = rdpsnd_queue_write;
261			oss_driver.wave_out_open = oss_open;
262			oss_driver.wave_out_close = oss_close;
263			oss_driver.wave_out_format_supported = oss_format_supported;
264			oss_driver.wave_out_set_format = oss_set_format;
265			oss_driver.wave_out_volume = oss_volume;
266			oss_driver.wave_out_play = oss_play;
267			oss_driver.name = xstrdup("oss");
268			oss_driver.description =
269			xstrdup("OSS output driver, default device: " DEFAULTDEVICE " or $AUDIODEV");
270	stargo	1260	oss_driver.need_byteswap_on_be = 0;
271	stargo	1256	oss_driver.next = NULL;
272
273	stargo	1255	if (options)
274			{
275			dsp_dev = xstrdup(options);
276			}
277			else
278			{
279			dsp_dev = getenv("AUDIODEV");
280
281			if (dsp_dev == NULL)
282			{
283			dsp_dev = xstrdup(DEFAULTDEVICE);
284			}
285			}
286
287			return &oss_driver;
288			}