rdesktop/trunk/rdpsnd_sgi.c

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Sound Channel Process Functions - SGI/IRIX
   Copyright (C) Matthew Chapman 2003-2008
   Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
   Copyright (C) Jeremy Meng void.foo@gmail.com 2004, 2005

   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 <errno.h>
#include <dmedia/audio.h>

/* #define IRIX_DEBUG 1 */

#define IRIX_MAX_VOL     65535

ALconfig audioconfig;
ALport output_port;

static int g_snd_rate;
static int width = AL_SAMPLE_16;
static char *sgi_output_device = NULL;

double min_volume, max_volume, volume_range;
int resource, maxFillable;
int combinedFrameSize;

void sgi_play(void);

void
sgi_add_fds(int *n, fd_set * rfds, fd_set * wfds, struct timeval *tv)
{
        /* We need to be called rather often... */
        if (output_port != (ALport) 0 && !rdpsnd_queue_empty())
                FD_SET(0, wfds);
}

void
sgi_check_fds(fd_set * rfds, fd_set * wfds)
{
        if (output_port == (ALport) 0)
                return;

        if (!rdpsnd_queue_empty())
                sgi_play();
}

RD_BOOL
sgi_open(void)
{
        ALparamInfo pinfo;
        static int warned = 0;

#if (defined(IRIX_DEBUG))
        fprintf(stderr, "sgi_open: begin\n");
#endif

        if (!warned && sgi_output_device)
        {
                warning("device-options not supported for libao-driver\n");
                warned = 1;
        }

        if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0)
        {
                fprintf(stderr, "sgi_open: alGetParamInfo failed: %s\n",
                        alGetErrorString(oserror()));
        }
        min_volume = alFixedToDouble(pinfo.min.ll);
        max_volume = alFixedToDouble(pinfo.max.ll);
        volume_range = (max_volume - min_volume);
#if (defined(IRIX_DEBUG))
        fprintf(stderr, "sgi_open: minvol = %lf, maxvol= %lf, range = %lf.\n",
                min_volume, max_volume, volume_range);
#endif

        audioconfig = alNewConfig();
        if (audioconfig == (ALconfig) 0)
        {
                fprintf(stderr, "sgi_open: alNewConfig failed: %s\n", alGetErrorString(oserror()));
                return False;
        }

        output_port = alOpenPort("rdpsnd", "w", 0);
        if (output_port == (ALport) 0)
        {
                fprintf(stderr, "sgi_open: alOpenPort failed: %s\n", alGetErrorString(oserror()));
                return False;
        }

#if (defined(IRIX_DEBUG))
        fprintf(stderr, "sgi_open: returning\n");
#endif
        return True;
}

void
sgi_close(void)
{
        /* Ack all remaining packets */
#if (defined(IRIX_DEBUG))
        fprintf(stderr, "sgi_close: begin\n");
#endif

        while (!rdpsnd_queue_empty())
                rdpsnd_queue_next(0);
        alDiscardFrames(output_port, 0);

        alClosePort(output_port);
        output_port = (ALport) 0;
        alFreeConfig(audioconfig);
#if (defined(IRIX_DEBUG))
        fprintf(stderr, "sgi_close: returning\n");
#endif
}

RD_BOOL
sgi_format_supported(RD_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;
}

RD_BOOL
sgi_set_format(RD_WAVEFORMATEX * pwfx)
{
        int channels;
        int frameSize, channelCount;
        ALpv params;

#if (defined(IRIX_DEBUG))
        fprintf(stderr, "sgi_set_format: init...\n");
#endif

        if (pwfx->wBitsPerSample == 8)
                width = AL_SAMPLE_8;
        else if (pwfx->wBitsPerSample == 16)
                width = AL_SAMPLE_16;

        /* Limited support to configure an opened audio port in IRIX.  The
           number of channels is a static setting and can not be changed after
           a port is opened.  So if the number of channels remains the same, we
           can configure other settings; otherwise we have to reopen the audio
           port, using same config. */

        channels = pwfx->nChannels;
        g_snd_rate = pwfx->nSamplesPerSec;

        alSetSampFmt(audioconfig, AL_SAMPFMT_TWOSCOMP);
        alSetWidth(audioconfig, width);
        if (channels != alGetChannels(audioconfig))
        {
                alClosePort(output_port);
                alSetChannels(audioconfig, channels);
                output_port = alOpenPort("rdpsnd", "w", audioconfig);

                if (output_port == (ALport) 0)
                {
                        fprintf(stderr, "sgi_set_format: alOpenPort failed: %s\n",
                                alGetErrorString(oserror()));
                        return False;
                }

        }

        resource = alGetResource(output_port);
        maxFillable = alGetFillable(output_port);
        channelCount = alGetChannels(audioconfig);
        frameSize = alGetWidth(audioconfig);

        if (frameSize == 0 || channelCount == 0)
        {
                fprintf(stderr, "sgi_set_format: bad frameSize or channelCount\n");
                return False;
        }
        combinedFrameSize = frameSize * channelCount;

        params.param = AL_RATE;
        params.value.ll = (long long) g_snd_rate << 32;

        if (alSetParams(resource, &params, 1) < 0)
        {
                fprintf(stderr, "wave_set_format: alSetParams failed: %s\n",
                        alGetErrorString(oserror()));
                return False;
        }
        if (params.sizeOut < 0)
        {
                fprintf(stderr, "wave_set_format: invalid rate %d\n", g_snd_rate);
                return False;
        }

#if (defined(IRIX_DEBUG))
        fprintf(stderr, "sgi_set_format: returning...\n");
#endif
        return True;
}

void
sgi_volume(uint16 left, uint16 right)
{
        double gainleft, gainright;
        ALpv pv[1];
        ALfixed gain[8];

#if (defined(IRIX_DEBUG))
        fprintf(stderr, "sgi_volume: begin\n");
        fprintf(stderr, "left='%d', right='%d'\n", left, right);
#endif

        gainleft = (double) left / IRIX_MAX_VOL;
        gainright = (double) right / IRIX_MAX_VOL;

        gain[0] = alDoubleToFixed(min_volume + gainleft * volume_range);
        gain[1] = alDoubleToFixed(min_volume + gainright * volume_range);

        pv[0].param = AL_GAIN;
        pv[0].value.ptr = gain;
        pv[0].sizeIn = 8;
        if (alSetParams(AL_DEFAULT_OUTPUT, pv, 1) < 0)
        {
                fprintf(stderr, "sgi_volume: alSetParams failed: %s\n",
                        alGetErrorString(oserror()));
                return;
        }

#if (defined(IRIX_DEBUG))
        fprintf(stderr, "sgi_volume: returning\n");
#endif
}

void
sgi_play(void)
{
        struct audio_packet *packet;
        ssize_t len;
        unsigned int i;
        STREAM out;
        int gf;

        while (1)
        {
                if (rdpsnd_queue_empty())
                        return;

                packet = rdpsnd_queue_current_packet();
                out = &packet->s;

                len = out->end - out->p;

                alWriteFrames(output_port, out->p, len / combinedFrameSize);

                out->p += len;
                if (out->p == out->end)
                {
                        gf = alGetFilled(output_port);
                        if (gf < (4 * maxFillable / 10))
                        {
                                rdpsnd_queue_next(0);
                        }
                        else
                        {
#if (defined(IRIX_DEBUG))
/*                              fprintf(stderr,"Busy playing...\n"); */
#endif
                                usleep(10);
                                return;
                        }
                }
        }
}

struct audio_driver *
sgi_register(char *options)
{
        static struct audio_driver sgi_driver;

        memset(&sgi_driver, 0, sizeof(sgi_driver));

        sgi_driver.name = "sgi";
        sgi_driver.description = "SGI output driver";

        sgi_driver.add_fds = sgi_add_fds;
        sgi_driver.check_fds = sgi_check_fds;

        sgi_driver.wave_out_open = sgi_open;
        sgi_driver.wave_out_close = sgi_close;
        sgi_driver.wave_out_format_supported = sgi_format_supported;
        sgi_driver.wave_out_set_format = sgi_set_format;
        sgi_driver.wave_out_volume = sgi_volume;

        sgi_driver.need_byteswap_on_be = 1;
        sgi_driver.need_resampling = 0;

        if (options)
        {
                sgi_output_device = xstrdup(options);
        }
        return &sgi_driver;
}
1	/* -- c-basic-offset: 8 --
2	rdesktop: A Remote Desktop Protocol client.
3	Sound Channel Process Functions - SGI/IRIX
4	Copyright (C) Matthew Chapman 2003-2008
5	Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
6	Copyright (C) Jeremy Meng void.foo@gmail.com 2004, 2005
7
8	This program is free software; you can redistribute it and/or modify
9	it under the terms of the GNU General Public License as published by
10	the Free Software Foundation; either version 2 of the License, or
11	(at your option) any later version.
12
13	This program is distributed in the hope that it will be useful,
14	but WITHOUT ANY WARRANTY; without even the implied warranty of
15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	GNU General Public License for more details.
17
18	You should have received a copy of the GNU General Public License
19	along with this program; if not, write to the Free Software
20	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21	*/
22
23	#include "rdesktop.h"
24	#include <errno.h>
25	#include <dmedia/audio.h>
26
27	/* #define IRIX_DEBUG 1 */
28
29	#define IRIX_MAX_VOL 65535
30
31	ALconfig audioconfig;
32	ALport output_port;
33
34	static int g_snd_rate;
35	static int width = AL_SAMPLE_16;
36	static char *sgi_output_device = NULL;
37
38	double min_volume, max_volume, volume_range;
39	int resource, maxFillable;
40	int combinedFrameSize;
41
42	void sgi_play(void);
43
44	void
45	sgi_add_fds(int n, fd_set rfds, fd_set * wfds, struct timeval *tv)
46	{
47	/* We need to be called rather often... */
48	if (output_port != (ALport) 0 && !rdpsnd_queue_empty())
49	FD_SET(0, wfds);
50	}
51
52	void
53	sgi_check_fds(fd_set * rfds, fd_set * wfds)
54	{
55	if (output_port == (ALport) 0)
56	return;
57
58	if (!rdpsnd_queue_empty())
59	sgi_play();
60	}
61
62	RD_BOOL
63	sgi_open(void)
64	{
65	ALparamInfo pinfo;
66	static int warned = 0;
67
68	#if (defined(IRIX_DEBUG))
69	fprintf(stderr, "sgi_open: begin\n");
70	#endif
71
72	if (!warned && sgi_output_device)
73	{
74	warning("device-options not supported for libao-driver\n");
75	warned = 1;
76	}
77
78	if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0)
79	{
80	fprintf(stderr, "sgi_open: alGetParamInfo failed: %s\n",
81	alGetErrorString(oserror()));
82	}
83	min_volume = alFixedToDouble(pinfo.min.ll);
84	max_volume = alFixedToDouble(pinfo.max.ll);
85	volume_range = (max_volume - min_volume);
86	#if (defined(IRIX_DEBUG))
87	fprintf(stderr, "sgi_open: minvol = %lf, maxvol= %lf, range = %lf.\n",
88	min_volume, max_volume, volume_range);
89	#endif
90
91	audioconfig = alNewConfig();
92	if (audioconfig == (ALconfig) 0)
93	{
94	fprintf(stderr, "sgi_open: alNewConfig failed: %s\n", alGetErrorString(oserror()));
95	return False;
96	}
97
98	output_port = alOpenPort("rdpsnd", "w", 0);
99	if (output_port == (ALport) 0)
100	{
101	fprintf(stderr, "sgi_open: alOpenPort failed: %s\n", alGetErrorString(oserror()));
102	return False;
103	}
104
105	#if (defined(IRIX_DEBUG))
106	fprintf(stderr, "sgi_open: returning\n");
107	#endif
108	return True;
109	}
110
111	void
112	sgi_close(void)
113	{
114	/* Ack all remaining packets */
115	#if (defined(IRIX_DEBUG))
116	fprintf(stderr, "sgi_close: begin\n");
117	#endif
118
119	while (!rdpsnd_queue_empty())
120	rdpsnd_queue_next(0);
121	alDiscardFrames(output_port, 0);
122
123	alClosePort(output_port);
124	output_port = (ALport) 0;
125	alFreeConfig(audioconfig);
126	#if (defined(IRIX_DEBUG))
127	fprintf(stderr, "sgi_close: returning\n");
128	#endif
129	}
130
131	RD_BOOL
132	sgi_format_supported(RD_WAVEFORMATEX * pwfx)
133	{
134	if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
135	return False;
136	if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
137	return False;
138	if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
139	return False;
140
141	return True;
142	}
143
144	RD_BOOL
145	sgi_set_format(RD_WAVEFORMATEX * pwfx)
146	{
147	int channels;
148	int frameSize, channelCount;
149	ALpv params;
150
151	#if (defined(IRIX_DEBUG))
152	fprintf(stderr, "sgi_set_format: init...\n");
153	#endif
154
155	if (pwfx->wBitsPerSample == 8)
156	width = AL_SAMPLE_8;
157	else if (pwfx->wBitsPerSample == 16)
158	width = AL_SAMPLE_16;
159
160	/* Limited support to configure an opened audio port in IRIX. The
161	number of channels is a static setting and can not be changed after
162	a port is opened. So if the number of channels remains the same, we
163	can configure other settings; otherwise we have to reopen the audio
164	port, using same config. */
165
166	channels = pwfx->nChannels;
167	g_snd_rate = pwfx->nSamplesPerSec;
168
169	alSetSampFmt(audioconfig, AL_SAMPFMT_TWOSCOMP);
170	alSetWidth(audioconfig, width);
171	if (channels != alGetChannels(audioconfig))
172	{
173	alClosePort(output_port);
174	alSetChannels(audioconfig, channels);
175	output_port = alOpenPort("rdpsnd", "w", audioconfig);
176
177	if (output_port == (ALport) 0)
178	{
179	fprintf(stderr, "sgi_set_format: alOpenPort failed: %s\n",
180	alGetErrorString(oserror()));
181	return False;
182	}
183
184	}
185
186	resource = alGetResource(output_port);
187	maxFillable = alGetFillable(output_port);
188	channelCount = alGetChannels(audioconfig);
189	frameSize = alGetWidth(audioconfig);
190
191	if (frameSize == 0 \|\| channelCount == 0)
192	{
193	fprintf(stderr, "sgi_set_format: bad frameSize or channelCount\n");
194	return False;
195	}
196	combinedFrameSize = frameSize * channelCount;
197
198	params.param = AL_RATE;
199	params.value.ll = (long long) g_snd_rate << 32;
200
201	if (alSetParams(resource, &params, 1) < 0)
202	{
203	fprintf(stderr, "wave_set_format: alSetParams failed: %s\n",
204	alGetErrorString(oserror()));
205	return False;
206	}
207	if (params.sizeOut < 0)
208	{
209	fprintf(stderr, "wave_set_format: invalid rate %d\n", g_snd_rate);
210	return False;
211	}
212
213	#if (defined(IRIX_DEBUG))
214	fprintf(stderr, "sgi_set_format: returning...\n");
215	#endif
216	return True;
217	}
218
219	void
220	sgi_volume(uint16 left, uint16 right)
221	{
222	double gainleft, gainright;
223	ALpv pv[1];
224	ALfixed gain[8];
225
226	#if (defined(IRIX_DEBUG))
227	fprintf(stderr, "sgi_volume: begin\n");
228	fprintf(stderr, "left='%d', right='%d'\n", left, right);
229	#endif
230
231	gainleft = (double) left / IRIX_MAX_VOL;
232	gainright = (double) right / IRIX_MAX_VOL;
233
234	gain[0] = alDoubleToFixed(min_volume + gainleft * volume_range);
235	gain[1] = alDoubleToFixed(min_volume + gainright * volume_range);
236
237	pv[0].param = AL_GAIN;
238	pv[0].value.ptr = gain;
239	pv[0].sizeIn = 8;
240	if (alSetParams(AL_DEFAULT_OUTPUT, pv, 1) < 0)
241	{
242	fprintf(stderr, "sgi_volume: alSetParams failed: %s\n",
243	alGetErrorString(oserror()));
244	return;
245	}
246
247	#if (defined(IRIX_DEBUG))
248	fprintf(stderr, "sgi_volume: returning\n");
249	#endif
250	}
251
252	void
253	sgi_play(void)
254	{
255	struct audio_packet *packet;
256	ssize_t len;
257	unsigned int i;
258	STREAM out;
259	int gf;
260
261	while (1)
262	{
263	if (rdpsnd_queue_empty())
264	return;
265
266	packet = rdpsnd_queue_current_packet();
267	out = &packet->s;
268
269	len = out->end - out->p;
270
271	alWriteFrames(output_port, out->p, len / combinedFrameSize);
272
273	out->p += len;
274	if (out->p == out->end)
275	{
276	gf = alGetFilled(output_port);
277	if (gf < (4 * maxFillable / 10))
278	{
279	rdpsnd_queue_next(0);
280	}
281	else
282	{
283	#if (defined(IRIX_DEBUG))
284	/* fprintf(stderr,"Busy playing...\n"); */
285	#endif
286	usleep(10);
287	return;
288	}
289	}
290	}
291	}
292
293	struct audio_driver *
294	sgi_register(char *options)
295	{
296	static struct audio_driver sgi_driver;
297
298	memset(&sgi_driver, 0, sizeof(sgi_driver));
299
300	sgi_driver.name = "sgi";
301	sgi_driver.description = "SGI output driver";
302
303	sgi_driver.add_fds = sgi_add_fds;
304	sgi_driver.check_fds = sgi_check_fds;
305
306	sgi_driver.wave_out_open = sgi_open;
307	sgi_driver.wave_out_close = sgi_close;
308	sgi_driver.wave_out_format_supported = sgi_format_supported;
309	sgi_driver.wave_out_set_format = sgi_set_format;
310	sgi_driver.wave_out_volume = sgi_volume;
311
312	sgi_driver.need_byteswap_on_be = 1;
313	sgi_driver.need_resampling = 0;
314
315	if (options)
316	{
317	sgi_output_device = xstrdup(options);
318	}
319	return &sgi_driver;
320	}