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

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

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

        rdpsnd_queue_init();

        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())
        {
                /* We need to add 50 to tell windows that time has passed while
                 * playing this packet */
                rdpsnd_send_completion(rdpsnd_queue_current_packet()->tick + 50,
                                       rdpsnd_queue_current_packet()->index);
                rdpsnd_queue_next();
        }
        alDiscardFrames(output_port, 0);

        alClosePort(output_port);
        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

        g_swapaudio = False;
        if (pwfx->wBitsPerSample == 8)
                width = AL_SAMPLE_8;
        else if (pwfx->wBitsPerSample == 16)
        {
                width = AL_SAMPLE_16;
                /* Do we need to swap the 16bit values? (Are we BigEndian) */
#if (defined(B_ENDIAN))
                g_swapaudio = 1;
#else
                g_swapaudio = 0;
#endif
        }

        /* 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;
        uint8 swap;
        STREAM out;
        static BOOL swapped = False;
        int gf;

        while (1)
        {
                if (rdpsnd_queue_empty())
                {
                        g_dsp_busy = False;
                        return;
                }

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

                /* Swap the current packet, but only once */
                if (g_swapaudio && !swapped)
                {
                        for (i = 0; i < out->end - out->p; i += 2)
                        {
                                swap = *(out->p + i);
                                *(out->p + i) = *(out->p + i + 1);
                                *(out->p + i + 1) = swap;
                        }
                        swapped = True;
                }

                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_send_completion(packet->tick, packet->index);
                                rdpsnd_queue_next();
                                swapped = False;
                        }
                        else
                        {
#if (defined(IRIX_DEBUG))
/*                              fprintf(stderr,"Busy playing...\n"); */
#endif
                                g_dsp_busy = True;
                                usleep(10);
                                return;
                        }
                }
        }
}

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

        sgi_driver.wave_out_write = rdpsnd_queue_write;
        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.wave_out_play = sgi_play;
        sgi_driver.name = xstrdup("sgi");
        sgi_driver.description = xstrdup("SGI output driver");
        sgi_driver.next = NULL;

        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 BOOL g_swapaudio;
35	static int g_snd_rate;
36	static BOOL g_swapaudio;
37	static int width = AL_SAMPLE_16;
38	static char *sgi_output_device = NULL;
39
40	double min_volume, max_volume, volume_range;
41	int resource, maxFillable;
42	int combinedFrameSize;
43
44	BOOL
45	sgi_open(void)
46	{
47	ALparamInfo pinfo;
48	static int warned = 0;
49
50	#if (defined(IRIX_DEBUG))
51	fprintf(stderr, "sgi_open: begin\n");
52	#endif
53
54	if (!warned && sgi_output_device)
55	{
56	warning("device-options not supported for libao-driver\n");
57	warned = 1;
58	}
59
60	if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0)
61	{
62	fprintf(stderr, "sgi_open: alGetParamInfo failed: %s\n",
63	alGetErrorString(oserror()));
64	}
65	min_volume = alFixedToDouble(pinfo.min.ll);
66	max_volume = alFixedToDouble(pinfo.max.ll);
67	volume_range = (max_volume - min_volume);
68	#if (defined(IRIX_DEBUG))
69	fprintf(stderr, "sgi_open: minvol = %lf, maxvol= %lf, range = %lf.\n",
70	min_volume, max_volume, volume_range);
71	#endif
72
73	rdpsnd_queue_init();
74
75	audioconfig = alNewConfig();
76	if (audioconfig == (ALconfig) 0)
77	{
78	fprintf(stderr, "sgi_open: alNewConfig failed: %s\n", alGetErrorString(oserror()));
79	return False;
80	}
81
82	output_port = alOpenPort("rdpsnd", "w", 0);
83	if (output_port == (ALport) 0)
84	{
85	fprintf(stderr, "sgi_open: alOpenPort failed: %s\n", alGetErrorString(oserror()));
86	return False;
87	}
88
89	#if (defined(IRIX_DEBUG))
90	fprintf(stderr, "sgi_open: returning\n");
91	#endif
92	return True;
93	}
94
95	void
96	sgi_close(void)
97	{
98	/* Ack all remaining packets */
99	#if (defined(IRIX_DEBUG))
100	fprintf(stderr, "sgi_close: begin\n");
101	#endif
102
103	while (!rdpsnd_queue_empty())
104	{
105	/* We need to add 50 to tell windows that time has passed while
106	* playing this packet */
107	rdpsnd_send_completion(rdpsnd_queue_current_packet()->tick + 50,
108	rdpsnd_queue_current_packet()->index);
109	rdpsnd_queue_next();
110	}
111	alDiscardFrames(output_port, 0);
112
113	alClosePort(output_port);
114	alFreeConfig(audioconfig);
115	#if (defined(IRIX_DEBUG))
116	fprintf(stderr, "sgi_close: returning\n");
117	#endif
118	}
119
120	BOOL
121	sgi_format_supported(WAVEFORMATEX * pwfx)
122	{
123	if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
124	return False;
125	if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
126	return False;
127	if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
128	return False;
129
130	return True;
131	}
132
133	BOOL
134	sgi_set_format(WAVEFORMATEX * pwfx)
135	{
136	int channels;
137	int frameSize, channelCount;
138	ALpv params;
139
140	#if (defined(IRIX_DEBUG))
141	fprintf(stderr, "sgi_set_format: init...\n");
142	#endif
143
144	g_swapaudio = False;
145	if (pwfx->wBitsPerSample == 8)
146	width = AL_SAMPLE_8;
147	else if (pwfx->wBitsPerSample == 16)
148	{
149	width = AL_SAMPLE_16;
150	/* Do we need to swap the 16bit values? (Are we BigEndian) */
151	#if (defined(B_ENDIAN))
152	g_swapaudio = 1;
153	#else
154	g_swapaudio = 0;
155	#endif
156	}
157
158	/* Limited support to configure an opened audio port in IRIX. The
159	number of channels is a static setting and can not be changed after
160	a port is opened. So if the number of channels remains the same, we
161	can configure other settings; otherwise we have to reopen the audio
162	port, using same config. */
163
164	channels = pwfx->nChannels;
165	g_snd_rate = pwfx->nSamplesPerSec;
166
167	alSetSampFmt(audioconfig, AL_SAMPFMT_TWOSCOMP);
168	alSetWidth(audioconfig, width);
169	if (channels != alGetChannels(audioconfig))
170	{
171	alClosePort(output_port);
172	alSetChannels(audioconfig, channels);
173	output_port = alOpenPort("rdpsnd", "w", audioconfig);
174
175	if (output_port == (ALport) 0)
176	{
177	fprintf(stderr, "sgi_set_format: alOpenPort failed: %s\n",
178	alGetErrorString(oserror()));
179	return False;
180	}
181
182	}
183
184	resource = alGetResource(output_port);
185	maxFillable = alGetFillable(output_port);
186	channelCount = alGetChannels(audioconfig);
187	frameSize = alGetWidth(audioconfig);
188
189	if (frameSize == 0 \|\| channelCount == 0)
190	{
191	fprintf(stderr, "sgi_set_format: bad frameSize or channelCount\n");
192	return False;
193	}
194	combinedFrameSize = frameSize * channelCount;
195
196	params.param = AL_RATE;
197	params.value.ll = (long long) g_snd_rate << 32;
198
199	if (alSetParams(resource, &params, 1) < 0)
200	{
201	fprintf(stderr, "wave_set_format: alSetParams failed: %s\n",
202	alGetErrorString(oserror()));
203	return False;
204	}
205	if (params.sizeOut < 0)
206	{
207	fprintf(stderr, "wave_set_format: invalid rate %d\n", g_snd_rate);
208	return False;
209	}
210
211	#if (defined(IRIX_DEBUG))
212	fprintf(stderr, "sgi_set_format: returning...\n");
213	#endif
214	return True;
215	}
216
217	void
218	sgi_volume(uint16 left, uint16 right)
219	{
220	double gainleft, gainright;
221	ALpv pv[1];
222	ALfixed gain[8];
223
224	#if (defined(IRIX_DEBUG))
225	fprintf(stderr, "sgi_volume: begin\n");
226	fprintf(stderr, "left='%d', right='%d'\n", left, right);
227	#endif
228
229	gainleft = (double) left / IRIX_MAX_VOL;
230	gainright = (double) right / IRIX_MAX_VOL;
231
232	gain[0] = alDoubleToFixed(min_volume + gainleft * volume_range);
233	gain[1] = alDoubleToFixed(min_volume + gainright * volume_range);
234
235	pv[0].param = AL_GAIN;
236	pv[0].value.ptr = gain;
237	pv[0].sizeIn = 8;
238	if (alSetParams(AL_DEFAULT_OUTPUT, pv, 1) < 0)
239	{
240	fprintf(stderr, "sgi_volume: alSetParams failed: %s\n",
241	alGetErrorString(oserror()));
242	return;
243	}
244
245	#if (defined(IRIX_DEBUG))
246	fprintf(stderr, "sgi_volume: returning\n");
247	#endif
248	}
249
250	void
251	sgi_play(void)
252	{
253	struct audio_packet *packet;
254	ssize_t len;
255	unsigned int i;
256	uint8 swap;
257	STREAM out;
258	static BOOL swapped = False;
259	int gf;
260
261	while (1)
262	{
263	if (rdpsnd_queue_empty())
264	{
265	g_dsp_busy = False;
266	return;
267	}
268
269	packet = rdpsnd_queue_current_packet();
270	out = &packet->s;
271
272	/* Swap the current packet, but only once */
273	if (g_swapaudio && !swapped)
274	{
275	for (i = 0; i < out->end - out->p; i += 2)
276	{
277	swap = *(out->p + i);
278	(out->p + i) = (out->p + i + 1);
279	*(out->p + i + 1) = swap;
280	}
281	swapped = True;
282	}
283
284	len = out->end - out->p;
285
286	alWriteFrames(output_port, out->p, len / combinedFrameSize);
287
288	out->p += len;
289	if (out->p == out->end)
290	{
291	gf = alGetFilled(output_port);
292	if (gf < (4 * maxFillable / 10))
293	{
294	rdpsnd_send_completion(packet->tick, packet->index);
295	rdpsnd_queue_next();
296	swapped = False;
297	}
298	else
299	{
300	#if (defined(IRIX_DEBUG))
301	/* fprintf(stderr,"Busy playing...\n"); */
302	#endif
303	g_dsp_busy = True;
304	usleep(10);
305	return;
306	}
307	}
308	}
309	}
310
311	struct audio_driver *
312	sgi_register(char *options)
313	{
314	static struct audio_driver sgi_driver;
315
316	sgi_driver.wave_out_write = rdpsnd_queue_write;
317	sgi_driver.wave_out_open = sgi_open;
318	sgi_driver.wave_out_close = sgi_close;
319	sgi_driver.wave_out_format_supported = sgi_format_supported;
320	sgi_driver.wave_out_set_format = sgi_set_format;
321	sgi_driver.wave_out_volume = sgi_volume;
322	sgi_driver.wave_out_play = sgi_play;
323	sgi_driver.name = xstrdup("sgi");
324	sgi_driver.description = xstrdup("SGI output driver");
325	sgi_driver.next = NULL;
326
327	if (options)
328	{
329	sgi_output_device = xstrdup(options);
330	}
331	return &sgi_driver;
332	}