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;

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

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