trunk/rdesktop/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)
{
}

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;
                        }
                }
        }
}

static struct audio_driver sgi_driver = {
        .name = "sgi",
        .description = "SGI output driver",

        .add_fds = sgi_add_fds,
        .check_fds = sgi_check_fds,

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

        .need_byteswap_on_be = 1,
        .need_resampling = 0,
};

struct audio_driver *
sgi_register(char *options)
{
        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	}
48
49	void
50	sgi_check_fds(fd_set * rfds, fd_set * wfds)
51	{
52	if (output_port == (ALport) 0)
53	return;
54
55	if (!rdpsnd_queue_empty())
56	sgi_play();
57	}
58
59	BOOL
60	sgi_open(void)
61	{
62	ALparamInfo pinfo;
63	static int warned = 0;
64
65	#if (defined(IRIX_DEBUG))
66	fprintf(stderr, "sgi_open: begin\n");
67	#endif
68
69	if (!warned && sgi_output_device)
70	{
71	warning("device-options not supported for libao-driver\n");
72	warned = 1;
73	}
74
75	if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0)
76	{
77	fprintf(stderr, "sgi_open: alGetParamInfo failed: %s\n",
78	alGetErrorString(oserror()));
79	}
80	min_volume = alFixedToDouble(pinfo.min.ll);
81	max_volume = alFixedToDouble(pinfo.max.ll);
82	volume_range = (max_volume - min_volume);
83	#if (defined(IRIX_DEBUG))
84	fprintf(stderr, "sgi_open: minvol = %lf, maxvol= %lf, range = %lf.\n",
85	min_volume, max_volume, volume_range);
86	#endif
87
88	audioconfig = alNewConfig();
89	if (audioconfig == (ALconfig) 0)
90	{
91	fprintf(stderr, "sgi_open: alNewConfig failed: %s\n", alGetErrorString(oserror()));
92	return False;
93	}
94
95	output_port = alOpenPort("rdpsnd", "w", 0);
96	if (output_port == (ALport) 0)
97	{
98	fprintf(stderr, "sgi_open: alOpenPort failed: %s\n", alGetErrorString(oserror()));
99	return False;
100	}
101
102	#if (defined(IRIX_DEBUG))
103	fprintf(stderr, "sgi_open: returning\n");
104	#endif
105	return True;
106	}
107
108	void
109	sgi_close(void)
110	{
111	/* Ack all remaining packets */
112	#if (defined(IRIX_DEBUG))
113	fprintf(stderr, "sgi_close: begin\n");
114	#endif
115
116	while (!rdpsnd_queue_empty())
117	rdpsnd_queue_next(0);
118	alDiscardFrames(output_port, 0);
119
120	alClosePort(output_port);
121	output_port = (ALport) 0;
122	alFreeConfig(audioconfig);
123	#if (defined(IRIX_DEBUG))
124	fprintf(stderr, "sgi_close: returning\n");
125	#endif
126	}
127
128	BOOL
129	sgi_format_supported(WAVEFORMATEX * pwfx)
130	{
131	if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
132	return False;
133	if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
134	return False;
135	if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
136	return False;
137
138	return True;
139	}
140
141	BOOL
142	sgi_set_format(WAVEFORMATEX * pwfx)
143	{
144	int channels;
145	int frameSize, channelCount;
146	ALpv params;
147
148	#if (defined(IRIX_DEBUG))
149	fprintf(stderr, "sgi_set_format: init...\n");
150	#endif
151
152	if (pwfx->wBitsPerSample == 8)
153	width = AL_SAMPLE_8;
154	else if (pwfx->wBitsPerSample == 16)
155	width = AL_SAMPLE_16;
156
157	/* Limited support to configure an opened audio port in IRIX. The
158	number of channels is a static setting and can not be changed after
159	a port is opened. So if the number of channels remains the same, we
160	can configure other settings; otherwise we have to reopen the audio
161	port, using same config. */
162
163	channels = pwfx->nChannels;
164	g_snd_rate = pwfx->nSamplesPerSec;
165
166	alSetSampFmt(audioconfig, AL_SAMPFMT_TWOSCOMP);
167	alSetWidth(audioconfig, width);
168	if (channels != alGetChannels(audioconfig))
169	{
170	alClosePort(output_port);
171	alSetChannels(audioconfig, channels);
172	output_port = alOpenPort("rdpsnd", "w", audioconfig);
173
174	if (output_port == (ALport) 0)
175	{
176	fprintf(stderr, "sgi_set_format: alOpenPort failed: %s\n",
177	alGetErrorString(oserror()));
178	return False;
179	}
180
181	}
182
183	resource = alGetResource(output_port);
184	maxFillable = alGetFillable(output_port);
185	channelCount = alGetChannels(audioconfig);
186	frameSize = alGetWidth(audioconfig);
187
188	if (frameSize == 0 \|\| channelCount == 0)
189	{
190	fprintf(stderr, "sgi_set_format: bad frameSize or channelCount\n");
191	return False;
192	}
193	combinedFrameSize = frameSize * channelCount;
194
195	params.param = AL_RATE;
196	params.value.ll = (long long) g_snd_rate << 32;
197
198	if (alSetParams(resource, &params, 1) < 0)
199	{
200	fprintf(stderr, "wave_set_format: alSetParams failed: %s\n",
201	alGetErrorString(oserror()));
202	return False;
203	}
204	if (params.sizeOut < 0)
205	{
206	fprintf(stderr, "wave_set_format: invalid rate %d\n", g_snd_rate);
207	return False;
208	}
209
210	#if (defined(IRIX_DEBUG))
211	fprintf(stderr, "sgi_set_format: returning...\n");
212	#endif
213	return True;
214	}
215
216	void
217	sgi_volume(uint16 left, uint16 right)
218	{
219	double gainleft, gainright;
220	ALpv pv[1];
221	ALfixed gain[8];
222
223	#if (defined(IRIX_DEBUG))
224	fprintf(stderr, "sgi_volume: begin\n");
225	fprintf(stderr, "left='%d', right='%d'\n", left, right);
226	#endif
227
228	gainleft = (double) left / IRIX_MAX_VOL;
229	gainright = (double) right / IRIX_MAX_VOL;
230
231	gain[0] = alDoubleToFixed(min_volume + gainleft * volume_range);
232	gain[1] = alDoubleToFixed(min_volume + gainright * volume_range);
233
234	pv[0].param = AL_GAIN;
235	pv[0].value.ptr = gain;
236	pv[0].sizeIn = 8;
237	if (alSetParams(AL_DEFAULT_OUTPUT, pv, 1) < 0)
238	{
239	fprintf(stderr, "sgi_volume: alSetParams failed: %s\n",
240	alGetErrorString(oserror()));
241	return;
242	}
243
244	#if (defined(IRIX_DEBUG))
245	fprintf(stderr, "sgi_volume: returning\n");
246	#endif
247	}
248
249	void
250	sgi_play(void)
251	{
252	struct audio_packet *packet;
253	ssize_t len;
254	unsigned int i;
255	STREAM out;
256	int gf;
257
258	while (1)
259	{
260	if (rdpsnd_queue_empty())
261	return;
262
263	packet = rdpsnd_queue_current_packet();
264	out = &packet->s;
265
266	len = out->end - out->p;
267
268	alWriteFrames(output_port, out->p, len / combinedFrameSize);
269
270	out->p += len;
271	if (out->p == out->end)
272	{
273	gf = alGetFilled(output_port);
274	if (gf < (4 * maxFillable / 10))
275	{
276	rdpsnd_queue_next(0);
277	}
278	else
279	{
280	#if (defined(IRIX_DEBUG))
281	/* fprintf(stderr,"Busy playing...\n"); */
282	#endif
283	usleep(10);
284	return;
285	}
286	}
287	}
288	}
289
290	static struct audio_driver sgi_driver = {
291	.name = "sgi",
292	.description = "SGI output driver",
293
294	.add_fds = sgi_add_fds,
295	.check_fds = sgi_check_fds,
296
297	.wave_out_open = sgi_open,
298	.wave_out_close = sgi_close,
299	.wave_out_format_supported = sgi_format_supported,
300	.wave_out_set_format = sgi_set_format,
301	.wave_out_volume = sgi_volume,
302
303	.need_byteswap_on_be = 1,
304	.need_resampling = 0,
305	};
306
307	struct audio_driver *
308	sgi_register(char *options)
309	{
310	if (options)
311	{
312	sgi_output_device = xstrdup(options);
313	}
314	return &sgi_driver;
315	}