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
   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... */
        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();
}

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
}

BOOL
sgi_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
sgi_set_format(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
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	FD_SET(0, wfds);
49	}
50
51	void
52	sgi_check_fds(fd_set * rfds, fd_set * wfds)
53	{
54	if (output_port == (ALport) 0)
55	return;
56
57	if (!rdpsnd_queue_empty())
58	sgi_play();
59	}
60
61	BOOL
62	sgi_open(void)
63	{
64	ALparamInfo pinfo;
65	static int warned = 0;
66
67	#if (defined(IRIX_DEBUG))
68	fprintf(stderr, "sgi_open: begin\n");
69	#endif
70
71	if (!warned && sgi_output_device)
72	{
73	warning("device-options not supported for libao-driver\n");
74	warned = 1;
75	}
76
77	if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0)
78	{
79	fprintf(stderr, "sgi_open: alGetParamInfo failed: %s\n",
80	alGetErrorString(oserror()));
81	}
82	min_volume = alFixedToDouble(pinfo.min.ll);
83	max_volume = alFixedToDouble(pinfo.max.ll);
84	volume_range = (max_volume - min_volume);
85	#if (defined(IRIX_DEBUG))
86	fprintf(stderr, "sgi_open: minvol = %lf, maxvol= %lf, range = %lf.\n",
87	min_volume, max_volume, volume_range);
88	#endif
89
90	audioconfig = alNewConfig();
91	if (audioconfig == (ALconfig) 0)
92	{
93	fprintf(stderr, "sgi_open: alNewConfig failed: %s\n", alGetErrorString(oserror()));
94	return False;
95	}
96
97	output_port = alOpenPort("rdpsnd", "w", 0);
98	if (output_port == (ALport) 0)
99	{
100	fprintf(stderr, "sgi_open: alOpenPort failed: %s\n", alGetErrorString(oserror()));
101	return False;
102	}
103
104	#if (defined(IRIX_DEBUG))
105	fprintf(stderr, "sgi_open: returning\n");
106	#endif
107	return True;
108	}
109
110	void
111	sgi_close(void)
112	{
113	/* Ack all remaining packets */
114	#if (defined(IRIX_DEBUG))
115	fprintf(stderr, "sgi_close: begin\n");
116	#endif
117
118	while (!rdpsnd_queue_empty())
119	rdpsnd_queue_next(0);
120	alDiscardFrames(output_port, 0);
121
122	alClosePort(output_port);
123	output_port = (ALport) 0;
124	alFreeConfig(audioconfig);
125	#if (defined(IRIX_DEBUG))
126	fprintf(stderr, "sgi_close: returning\n");
127	#endif
128	}
129
130	BOOL
131	sgi_format_supported(WAVEFORMATEX * pwfx)
132	{
133	if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
134	return False;
135	if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
136	return False;
137	if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
138	return False;
139
140	return True;
141	}
142
143	BOOL
144	sgi_set_format(WAVEFORMATEX * pwfx)
145	{
146	int channels;
147	int frameSize, channelCount;
148	ALpv params;
149
150	#if (defined(IRIX_DEBUG))
151	fprintf(stderr, "sgi_set_format: init...\n");
152	#endif
153
154	if (pwfx->wBitsPerSample == 8)
155	width = AL_SAMPLE_8;
156	else if (pwfx->wBitsPerSample == 16)
157	width = AL_SAMPLE_16;
158
159	/* Limited support to configure an opened audio port in IRIX. The
160	number of channels is a static setting and can not be changed after
161	a port is opened. So if the number of channels remains the same, we
162	can configure other settings; otherwise we have to reopen the audio
163	port, using same config. */
164
165	channels = pwfx->nChannels;
166	g_snd_rate = pwfx->nSamplesPerSec;
167
168	alSetSampFmt(audioconfig, AL_SAMPFMT_TWOSCOMP);
169	alSetWidth(audioconfig, width);
170	if (channels != alGetChannels(audioconfig))
171	{
172	alClosePort(output_port);
173	alSetChannels(audioconfig, channels);
174	output_port = alOpenPort("rdpsnd", "w", audioconfig);
175
176	if (output_port == (ALport) 0)
177	{
178	fprintf(stderr, "sgi_set_format: alOpenPort failed: %s\n",
179	alGetErrorString(oserror()));
180	return False;
181	}
182
183	}
184
185	resource = alGetResource(output_port);
186	maxFillable = alGetFillable(output_port);
187	channelCount = alGetChannels(audioconfig);
188	frameSize = alGetWidth(audioconfig);
189
190	if (frameSize == 0 \|\| channelCount == 0)
191	{
192	fprintf(stderr, "sgi_set_format: bad frameSize or channelCount\n");
193	return False;
194	}
195	combinedFrameSize = frameSize * channelCount;
196
197	params.param = AL_RATE;
198	params.value.ll = (long long) g_snd_rate << 32;
199
200	if (alSetParams(resource, &params, 1) < 0)
201	{
202	fprintf(stderr, "wave_set_format: alSetParams failed: %s\n",
203	alGetErrorString(oserror()));
204	return False;
205	}
206	if (params.sizeOut < 0)
207	{
208	fprintf(stderr, "wave_set_format: invalid rate %d\n", g_snd_rate);
209	return False;
210	}
211
212	#if (defined(IRIX_DEBUG))
213	fprintf(stderr, "sgi_set_format: returning...\n");
214	#endif
215	return True;
216	}
217
218	void
219	sgi_volume(uint16 left, uint16 right)
220	{
221	double gainleft, gainright;
222	ALpv pv[1];
223	ALfixed gain[8];
224
225	#if (defined(IRIX_DEBUG))
226	fprintf(stderr, "sgi_volume: begin\n");
227	fprintf(stderr, "left='%d', right='%d'\n", left, right);
228	#endif
229
230	gainleft = (double) left / IRIX_MAX_VOL;
231	gainright = (double) right / IRIX_MAX_VOL;
232
233	gain[0] = alDoubleToFixed(min_volume + gainleft * volume_range);
234	gain[1] = alDoubleToFixed(min_volume + gainright * volume_range);
235
236	pv[0].param = AL_GAIN;
237	pv[0].value.ptr = gain;
238	pv[0].sizeIn = 8;
239	if (alSetParams(AL_DEFAULT_OUTPUT, pv, 1) < 0)
240	{
241	fprintf(stderr, "sgi_volume: alSetParams failed: %s\n",
242	alGetErrorString(oserror()));
243	return;
244	}
245
246	#if (defined(IRIX_DEBUG))
247	fprintf(stderr, "sgi_volume: returning\n");
248	#endif
249	}
250
251	void
252	sgi_play(void)
253	{
254	struct audio_packet *packet;
255	ssize_t len;
256	unsigned int i;
257	STREAM out;
258	int gf;
259
260	while (1)
261	{
262	if (rdpsnd_queue_empty())
263	return;
264
265	packet = rdpsnd_queue_current_packet();
266	out = &packet->s;
267
268	len = out->end - out->p;
269
270	alWriteFrames(output_port, out->p, len / combinedFrameSize);
271
272	out->p += len;
273	if (out->p == out->end)
274	{
275	gf = alGetFilled(output_port);
276	if (gf < (4 * maxFillable / 10))
277	{
278	rdpsnd_queue_next(0);
279	}
280	else
281	{
282	#if (defined(IRIX_DEBUG))
283	/* fprintf(stderr,"Busy playing...\n"); */
284	#endif
285	usleep(10);
286	return;
287	}
288	}
289	}
290	}
291
292	struct audio_driver *
293	sgi_register(char *options)
294	{
295	static struct audio_driver sgi_driver;
296
297	memset(&sgi_driver, 0, sizeof(sgi_driver));
298
299	sgi_driver.name = "sgi";
300	sgi_driver.description = "SGI output driver";
301
302	sgi_driver.add_fds = sgi_add_fds;
303	sgi_driver.check_fds = sgi_check_fds;
304
305	sgi_driver.wave_out_open = sgi_open;
306	sgi_driver.wave_out_close = sgi_close;
307	sgi_driver.wave_out_format_supported = sgi_format_supported;
308	sgi_driver.wave_out_set_format = sgi_set_format;
309	sgi_driver.wave_out_volume = sgi_volume;
310
311	sgi_driver.need_byteswap_on_be = 1;
312	sgi_driver.need_resampling = 0;
313
314	if (options)
315	{
316	sgi_output_device = xstrdup(options);
317	}
318	return &sgi_driver;
319	}