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;

BOOL
wave_out_open(void)
{
        char *dsp_dev = getenv("AUDIODEV");

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

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

        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;
        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
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_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;
}
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	matthewc	475
45			BOOL
46			wave_out_open(void)
47			{
48	stargo	751	char *dsp_dev = getenv("AUDIODEV");
49	matthewc	475
50	stargo	751	if (dsp_dev == NULL)
51			{
52	stargo	1254	dsp_dev = xstrdup(DEFAULTDEVICE);
53	stargo	751	}
54
55	stargo	1247	if ((g_dsp_fd = open(dsp_dev, O_WRONLY)) == -1)
56	matthewc	475	{
57			perror(dsp_dev);
58			return False;
59			}
60
61			return True;
62			}
63
64			void
65			wave_out_close(void)
66			{
67			close(g_dsp_fd);
68			}
69
70			BOOL
71	astrand	499	wave_out_format_supported(WAVEFORMATEX * pwfx)
72	matthewc	475	{
73			if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
74			return False;
75			if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
76			return False;
77			if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
78			return False;
79
80			return True;
81			}
82
83			BOOL
84	astrand	499	wave_out_set_format(WAVEFORMATEX * pwfx)
85	matthewc	475	{
86	stargo	761	int stereo, format, fragments;
87	stargo	1247	static BOOL driver_broken = False;
88	matthewc	475
89			ioctl(g_dsp_fd, SNDCTL_DSP_RESET, NULL);
90			ioctl(g_dsp_fd, SNDCTL_DSP_SYNC, NULL);
91
92			if (pwfx->wBitsPerSample == 8)
93			format = AFMT_U8;
94			else if (pwfx->wBitsPerSample == 16)
95			format = AFMT_S16_LE;
96
97	stargo	1247	samplewidth = pwfx->wBitsPerSample / 8;
98	stargo	510
99	matthewc	475	if (ioctl(g_dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1)
100			{
101			perror("SNDCTL_DSP_SETFMT");
102			close(g_dsp_fd);
103			return False;
104			}
105
106	stargo	760	if (pwfx->nChannels == 2)
107	matthewc	475	{
108	stargo	760	stereo = 1;
109	stargo	1247	samplewidth *= 2;
110	stargo	760	}
111			else
112			{
113			stereo = 0;
114			}
115
116			if (ioctl(g_dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1)
117			{
118	matthewc	475	perror("SNDCTL_DSP_CHANNELS");
119			close(g_dsp_fd);
120			return False;
121			}
122
123	stargo	1247	snd_rate = pwfx->nSamplesPerSec;
124			if (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, &snd_rate) == -1)
125	stargo	510	{
126	matthewc	475	perror("SNDCTL_DSP_SPEED");
127			close(g_dsp_fd);
128			return False;
129			}
130
131	stargo	1247	/* try to get 12 fragments of 2^12 bytes size */
132			fragments = (12 << 16) + 12;
133	stargo	761	ioctl(g_dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments);
134
135	stargo	1247	if (!driver_broken)
136	stargo	761	{
137			audio_buf_info info;
138
139	astrand	801	memset(&info, 0, sizeof(info));
140	stargo	761	if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
141			{
142			perror("SNDCTL_DSP_GETOSPACE");
143			close(g_dsp_fd);
144			return False;
145			}
146
147			if (info.fragments == 0 \|\| info.fragstotal == 0 \|\| info.fragsize == 0)
148			{
149			fprintf(stderr,
150			"Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n",
151			info.fragments, info.fragstotal, info.fragsize);
152	stargo	1247	driver_broken = True;
153	stargo	761	}
154			}
155
156	matthewc	475	return True;
157			}
158
159			void
160	stargo	491	wave_out_volume(uint16 left, uint16 right)
161			{
162	stargo	509	static BOOL use_dev_mixer = False;
163	stargo	491	uint32 volume;
164	stargo	509	int fd_mix = -1;
165	stargo	491
166	astrand	499	volume = left / (65536 / 100);
167			volume \|= right / (65536 / 100) << 8;
168	stargo	509
169			if (use_dev_mixer)
170			{
171	astrand	532	if ((fd_mix = open("/dev/mixer", O_RDWR \| O_NONBLOCK)) == -1)
172	stargo	509	{
173			perror("open /dev/mixer");
174			return;
175			}
176
177			if (ioctl(fd_mix, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
178			{
179			perror("MIXER_WRITE(SOUND_MIXER_PCM)");
180			return;
181			}
182
183			close(fd_mix);
184			}
185
186	stargo	491	if (ioctl(g_dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
187			{
188			perror("MIXER_WRITE(SOUND_MIXER_PCM)");
189	stargo	509	use_dev_mixer = True;
190	stargo	491	return;
191			}
192			}
193
194			void
195	matthewc	475	wave_out_play(void)
196			{
197			struct audio_packet *packet;
198			ssize_t len;
199			STREAM out;
200	stargo	510	static long startedat_us;
201			static long startedat_s;
202			static BOOL started = False;
203			struct timeval tv;
204	matthewc	475
205	stargo	1254	if (rdpsnd_queue_empty())
206	matthewc	475	{
207	stargo	1247	g_dsp_busy = 0;
208			return;
209			}
210	matthewc	475
211	stargo	1254	packet = rdpsnd_queue_current_packet();
212	stargo	1247	out = &packet->s;
213	matthewc	475
214	stargo	1247	if (!started)
215			{
216			gettimeofday(&tv, NULL);
217			startedat_us = tv.tv_usec;
218			startedat_s = tv.tv_sec;
219			started = True;
220			}
221	stargo	510
222	stargo	1247	len = out->end - out->p;
223	stargo	761
224	stargo	1247	len = write(g_dsp_fd, out->p, (len > MAX_LEN) ? MAX_LEN : len);
225			if (len == -1)
226			{
227			if (errno != EWOULDBLOCK)
228			perror("write audio");
229			g_dsp_busy = 1;
230			return;
231			}
232	stargo	761
233	stargo	1247	out->p += len;
234			if (out->p == out->end)
235			{
236			long long duration;
237			long elapsed;
238	stargo	761
239	stargo	1247	gettimeofday(&tv, NULL);
240			duration = (out->size * (1000000 / (samplewidth * snd_rate)));
241			elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us);
242	stargo	761
243	stargo	1247	if (elapsed >= (duration * 85) / 100)
244	matthewc	475	{
245	stargo	1254	/* We need to add 50 to tell windows that time has passed while
246			* playing this packet */
247			rdpsnd_send_completion(packet->tick + 50, packet->index);
248			rdpsnd_queue_next();
249	stargo	1247	started = False;
250			}
251			else
252			{
253	matthewc	475	g_dsp_busy = 1;
254			return;
255			}
256			}
257	stargo	1247	g_dsp_busy = 1;
258			return;
259	matthewc	475	}