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 "rdpsnd_dsp.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;
static struct audio_driver oss_driver;

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)
{
        uint32 volume;

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

        if (ioctl(g_dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
        {
                warning("hardware volume control unavailable, falling back to software volume control!\n");
                oss_driver.wave_out_volume = rdpsnd_dsp_softvol_set;
                rdpsnd_dsp_softvol_set(left, right);
                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)
{
        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.need_resampling = 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	stargo	1269	#include "rdpsnd_dsp.h"
33	matthewc	475	#include <unistd.h>
34			#include <fcntl.h>
35			#include <errno.h>
36	stargo	510	#include <sys/time.h>
37	matthewc	475	#include <sys/ioctl.h>
38			#include <sys/soundcard.h>
39
40	stargo	1254	#define DEFAULTDEVICE "/dev/dsp"
41	stargo	1247	#define MAX_LEN 512
42	matthewc	475
43	stargo	1247	static int snd_rate;
44			static short samplewidth;
45	stargo	1255	static char *dsp_dev;
46	stargo	1269	static struct audio_driver oss_driver;
47	matthewc	475
48			BOOL
49	stargo	1255	oss_open(void)
50	matthewc	475	{
51	stargo	1247	if ((g_dsp_fd = open(dsp_dev, O_WRONLY)) == -1)
52	matthewc	475	{
53			perror(dsp_dev);
54			return False;
55			}
56
57			return True;
58			}
59
60			void
61	stargo	1255	oss_close(void)
62	matthewc	475	{
63			close(g_dsp_fd);
64			}
65
66			BOOL
67	stargo	1255	oss_format_supported(WAVEFORMATEX * pwfx)
68	matthewc	475	{
69			if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
70			return False;
71			if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
72			return False;
73			if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
74			return False;
75
76			return True;
77			}
78
79			BOOL
80	stargo	1255	oss_set_format(WAVEFORMATEX * pwfx)
81	matthewc	475	{
82	stargo	761	int stereo, format, fragments;
83	stargo	1247	static BOOL driver_broken = False;
84	matthewc	475
85			ioctl(g_dsp_fd, SNDCTL_DSP_RESET, NULL);
86			ioctl(g_dsp_fd, SNDCTL_DSP_SYNC, NULL);
87
88			if (pwfx->wBitsPerSample == 8)
89			format = AFMT_U8;
90			else if (pwfx->wBitsPerSample == 16)
91			format = AFMT_S16_LE;
92
93	stargo	1247	samplewidth = pwfx->wBitsPerSample / 8;
94	stargo	510
95	matthewc	475	if (ioctl(g_dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1)
96			{
97			perror("SNDCTL_DSP_SETFMT");
98			close(g_dsp_fd);
99			return False;
100			}
101
102	stargo	760	if (pwfx->nChannels == 2)
103	matthewc	475	{
104	stargo	760	stereo = 1;
105	stargo	1247	samplewidth *= 2;
106	stargo	760	}
107			else
108			{
109			stereo = 0;
110			}
111
112			if (ioctl(g_dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1)
113			{
114	matthewc	475	perror("SNDCTL_DSP_CHANNELS");
115			close(g_dsp_fd);
116			return False;
117			}
118
119	stargo	1247	snd_rate = pwfx->nSamplesPerSec;
120			if (ioctl(g_dsp_fd, SNDCTL_DSP_SPEED, &snd_rate) == -1)
121	stargo	510	{
122	matthewc	475	perror("SNDCTL_DSP_SPEED");
123			close(g_dsp_fd);
124			return False;
125			}
126
127	stargo	1247	/* try to get 12 fragments of 2^12 bytes size */
128			fragments = (12 << 16) + 12;
129	stargo	761	ioctl(g_dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments);
130
131	stargo	1247	if (!driver_broken)
132	stargo	761	{
133			audio_buf_info info;
134
135	astrand	801	memset(&info, 0, sizeof(info));
136	stargo	761	if (ioctl(g_dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
137			{
138			perror("SNDCTL_DSP_GETOSPACE");
139			close(g_dsp_fd);
140			return False;
141			}
142
143			if (info.fragments == 0 \|\| info.fragstotal == 0 \|\| info.fragsize == 0)
144			{
145			fprintf(stderr,
146			"Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n",
147			info.fragments, info.fragstotal, info.fragsize);
148	stargo	1247	driver_broken = True;
149	stargo	761	}
150			}
151
152	matthewc	475	return True;
153			}
154
155			void
156	stargo	1255	oss_volume(uint16 left, uint16 right)
157	stargo	491	{
158			uint32 volume;
159
160	astrand	499	volume = left / (65536 / 100);
161			volume \|= right / (65536 / 100) << 8;
162	stargo	509
163	stargo	491	if (ioctl(g_dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
164			{
165	stargo	1275	warning("hardware volume control unavailable, falling back to software volume control!\n");
166	stargo	1269	oss_driver.wave_out_volume = rdpsnd_dsp_softvol_set;
167	stargo	1275	rdpsnd_dsp_softvol_set(left, right);
168	stargo	491	return;
169			}
170			}
171
172			void
173	stargo	1255	oss_play(void)
174	matthewc	475	{
175			struct audio_packet *packet;
176			ssize_t len;
177			STREAM out;
178	stargo	510	static long startedat_us;
179			static long startedat_s;
180			static BOOL started = False;
181			struct timeval tv;
182	matthewc	475
183	stargo	1254	if (rdpsnd_queue_empty())
184	matthewc	475	{
185	stargo	1247	g_dsp_busy = 0;
186			return;
187			}
188	matthewc	475
189	stargo	1254	packet = rdpsnd_queue_current_packet();
190	stargo	1247	out = &packet->s;
191	matthewc	475
192	stargo	1247	if (!started)
193			{
194			gettimeofday(&tv, NULL);
195			startedat_us = tv.tv_usec;
196			startedat_s = tv.tv_sec;
197			started = True;
198			}
199	stargo	510
200	stargo	1247	len = out->end - out->p;
201	stargo	761
202	stargo	1247	len = write(g_dsp_fd, out->p, (len > MAX_LEN) ? MAX_LEN : len);
203			if (len == -1)
204			{
205			if (errno != EWOULDBLOCK)
206			perror("write audio");
207			g_dsp_busy = 1;
208			return;
209			}
210	stargo	761
211	stargo	1247	out->p += len;
212			if (out->p == out->end)
213			{
214			long long duration;
215			long elapsed;
216	stargo	761
217	stargo	1247	gettimeofday(&tv, NULL);
218			duration = (out->size * (1000000 / (samplewidth * snd_rate)));
219			elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us);
220	stargo	761
221	stargo	1247	if (elapsed >= (duration * 85) / 100)
222	matthewc	475	{
223	stargo	1254	/* We need to add 50 to tell windows that time has passed while
224			* playing this packet */
225			rdpsnd_send_completion(packet->tick + 50, packet->index);
226			rdpsnd_queue_next();
227	stargo	1247	started = False;
228			}
229			else
230			{
231	matthewc	475	g_dsp_busy = 1;
232			return;
233			}
234			}
235	stargo	1247	g_dsp_busy = 1;
236			return;
237	matthewc	475	}
238	stargo	1255
239			struct audio_driver *
240			oss_register(char *options)
241			{
242	stargo	1256	oss_driver.wave_out_write = rdpsnd_queue_write;
243			oss_driver.wave_out_open = oss_open;
244			oss_driver.wave_out_close = oss_close;
245			oss_driver.wave_out_format_supported = oss_format_supported;
246			oss_driver.wave_out_set_format = oss_set_format;
247			oss_driver.wave_out_volume = oss_volume;
248			oss_driver.wave_out_play = oss_play;
249			oss_driver.name = xstrdup("oss");
250			oss_driver.description =
251			xstrdup("OSS output driver, default device: " DEFAULTDEVICE " or $AUDIODEV");
252	stargo	1260	oss_driver.need_byteswap_on_be = 0;
253	stargo	1279	oss_driver.need_resampling = 0;
254	stargo	1256	oss_driver.next = NULL;
255
256	stargo	1255	if (options)
257			{
258			dsp_dev = xstrdup(options);
259			}
260			else
261			{
262			dsp_dev = getenv("AUDIODEV");
263
264			if (dsp_dev == NULL)
265			{
266			dsp_dev = xstrdup(DEFAULTDEVICE);
267			}
268			}
269
270			return &oss_driver;
271			}