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)
{
        /* 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(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;
}

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	astrand	963	/* -- c-basic-offset: 8 --
2	stargo	744	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	astrand	1032	Copyright (C) Jeremy Meng void.foo@gmail.com 2004, 2005
7	stargo	744
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	astrand	1032	/* #define IRIX_DEBUG 1 */
28	stargo	744
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	stargo	1255	static char *sgi_output_device = NULL;
37	stargo	744
38			double min_volume, max_volume, volume_range;
39			int resource, maxFillable;
40			int combinedFrameSize;
41
42	ossman_	1346	void sgi_play(void);
43
44			void
45			sgi_add_fds(int n, fd_set rfds, fd_set * wfds, struct timeval *tv)
46			{
47	stargo	1355	/* We need to be called rather often... */
48			FD_SET(0, wfds);
49	ossman_	1346	}
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	stargo	744	BOOL
62	stargo	1255	sgi_open(void)
63	stargo	744	{
64	astrand	746	ALparamInfo pinfo;
65	stargo	1255	static int warned = 0;
66	stargo	744
67			#if (defined(IRIX_DEBUG))
68	stargo	1254	fprintf(stderr, "sgi_open: begin\n");
69	stargo	744	#endif
70
71	stargo	1255	if (!warned && sgi_output_device)
72			{
73			warning("device-options not supported for libao-driver\n");
74			warned = 1;
75			}
76
77	astrand	746	if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0)
78			{
79	stargo	1254	fprintf(stderr, "sgi_open: alGetParamInfo failed: %s\n",
80	astrand	746	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	stargo	744	#if (defined(IRIX_DEBUG))
86	stargo	1254	fprintf(stderr, "sgi_open: minvol = %lf, maxvol= %lf, range = %lf.\n",
87	astrand	746	min_volume, max_volume, volume_range);
88	stargo	744	#endif
89
90			audioconfig = alNewConfig();
91	stargo	912	if (audioconfig == (ALconfig) 0)
92	astrand	746	{
93	stargo	1254	fprintf(stderr, "sgi_open: alNewConfig failed: %s\n", alGetErrorString(oserror()));
94	stargo	744	return False;
95			}
96
97			output_port = alOpenPort("rdpsnd", "w", 0);
98	astrand	746	if (output_port == (ALport) 0)
99			{
100	stargo	1254	fprintf(stderr, "sgi_open: alOpenPort failed: %s\n", alGetErrorString(oserror()));
101	stargo	744	return False;
102			}
103
104			#if (defined(IRIX_DEBUG))
105	stargo	1254	fprintf(stderr, "sgi_open: returning\n");
106	stargo	744	#endif
107			return True;
108			}
109
110			void
111	stargo	1255	sgi_close(void)
112	stargo	744	{
113			/* Ack all remaining packets */
114			#if (defined(IRIX_DEBUG))
115	stargo	1254	fprintf(stderr, "sgi_close: begin\n");
116	stargo	744	#endif
117	astrand	746
118	stargo	1254	while (!rdpsnd_queue_empty())
119	ossman_	1304	rdpsnd_queue_next(0);
120	astrand	746	alDiscardFrames(output_port, 0);
121
122	stargo	744	alClosePort(output_port);
123	ossman_	1346	output_port = (ALport) 0;
124	stargo	744	alFreeConfig(audioconfig);
125			#if (defined(IRIX_DEBUG))
126	stargo	1254	fprintf(stderr, "sgi_close: returning\n");
127	stargo	744	#endif
128			}
129
130			BOOL
131	jsorg71	1364	sgi_format_supported(RD_WAVEFORMATEX * pwfx)
132	stargo	744	{
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	jsorg71	1364	sgi_set_format(RD_WAVEFORMATEX * pwfx)
145	stargo	744	{
146			int channels;
147	astrand	746	int frameSize, channelCount;
148			ALpv params;
149
150	stargo	744	#if (defined(IRIX_DEBUG))
151	stargo	1254	fprintf(stderr, "sgi_set_format: init...\n");
152	stargo	744	#endif
153
154			if (pwfx->wBitsPerSample == 8)
155			width = AL_SAMPLE_8;
156	astrand	746	else if (pwfx->wBitsPerSample == 16)
157	stargo	744	width = AL_SAMPLE_16;
158
159	stargo	912	/* Limited support to configure an opened audio port in IRIX. The
160	astrand	909	number of channels is a static setting and can not be changed after
161	stargo	912	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	astrand	909	port, using same config. */
164	stargo	897
165	stargo	744	channels = pwfx->nChannels;
166			g_snd_rate = pwfx->nSamplesPerSec;
167
168			alSetSampFmt(audioconfig, AL_SAMPFMT_TWOSCOMP);
169			alSetWidth(audioconfig, width);
170	astrand	909	if (channels != alGetChannels(audioconfig))
171	stargo	897	{
172			alClosePort(output_port);
173			alSetChannels(audioconfig, channels);
174			output_port = alOpenPort("rdpsnd", "w", audioconfig);
175	stargo	744
176	stargo	897	if (output_port == (ALport) 0)
177			{
178	stargo	1254	fprintf(stderr, "sgi_set_format: alOpenPort failed: %s\n",
179	astrand	909	alGetErrorString(oserror()));
180	stargo	897	return False;
181			}
182	stargo	744
183			}
184
185			resource = alGetResource(output_port);
186			maxFillable = alGetFillable(output_port);
187	astrand	746	channelCount = alGetChannels(audioconfig);
188			frameSize = alGetWidth(audioconfig);
189	stargo	744
190	astrand	746	if (frameSize == 0 \|\| channelCount == 0)
191			{
192	stargo	1254	fprintf(stderr, "sgi_set_format: bad frameSize or channelCount\n");
193	astrand	746	return False;
194			}
195			combinedFrameSize = frameSize * channelCount;
196	stargo	744
197	astrand	746	params.param = AL_RATE;
198			params.value.ll = (long long) g_snd_rate << 32;
199	stargo	744
200	astrand	746	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	stargo	744
212			#if (defined(IRIX_DEBUG))
213	stargo	1254	fprintf(stderr, "sgi_set_format: returning...\n");
214	stargo	744	#endif
215			return True;
216			}
217
218			void
219	stargo	1255	sgi_volume(uint16 left, uint16 right)
220	stargo	744	{
221	astrand	746	double gainleft, gainright;
222			ALpv pv[1];
223			ALfixed gain[8];
224	stargo	744
225			#if (defined(IRIX_DEBUG))
226	stargo	1254	fprintf(stderr, "sgi_volume: begin\n");
227	astrand	746	fprintf(stderr, "left='%d', right='%d'\n", left, right);
228	stargo	744	#endif
229	astrand	746
230			gainleft = (double) left / IRIX_MAX_VOL;
231	stargo	744	gainright = (double) right / IRIX_MAX_VOL;
232
233	astrand	746	gain[0] = alDoubleToFixed(min_volume + gainleft * volume_range);
234			gain[1] = alDoubleToFixed(min_volume + gainright * volume_range);
235	stargo	744
236	astrand	746	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	stargo	1254	fprintf(stderr, "sgi_volume: alSetParams failed: %s\n",
242	astrand	746	alGetErrorString(oserror()));
243			return;
244			}
245	stargo	744
246			#if (defined(IRIX_DEBUG))
247	stargo	1254	fprintf(stderr, "sgi_volume: returning\n");
248	stargo	744	#endif
249			}
250
251			void
252	stargo	1255	sgi_play(void)
253	stargo	744	{
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	stargo	1254	if (rdpsnd_queue_empty())
263	stargo	744	return;
264
265	stargo	1254	packet = rdpsnd_queue_current_packet();
266	stargo	744	out = &packet->s;
267
268			len = out->end - out->p;
269
270	astrand	746	alWriteFrames(output_port, out->p, len / combinedFrameSize);
271	stargo	744
272			out->p += len;
273			if (out->p == out->end)
274			{
275	stargo	897	gf = alGetFilled(output_port);
276	astrand	909	if (gf < (4 * maxFillable / 10))
277	stargo	744	{
278	ossman_	1302	rdpsnd_queue_next(0);
279	stargo	744	}
280			else
281			{
282			#if (defined(IRIX_DEBUG))
283	stargo	897	/* fprintf(stderr,"Busy playing...\n"); */
284	stargo	744	#endif
285	astrand	1032	usleep(10);
286	stargo	744	return;
287			}
288			}
289			}
290			}
291	stargo	1255
292	stargo	1351	struct audio_driver *
293			sgi_register(char *options)
294			{
295			static struct audio_driver sgi_driver;
296	ossman_	1345
297	ossman_	1356	memset(&sgi_driver, 0, sizeof(sgi_driver));
298	ossman_	1346
299	ossman_	1356	sgi_driver.name = "sgi";
300			sgi_driver.description = "SGI output driver";
301
302	stargo	1351	sgi_driver.add_fds = sgi_add_fds;
303			sgi_driver.check_fds = sgi_check_fds;
304	ossman_	1345
305	stargo	1351	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	ossman_	1345
311	stargo	1351	sgi_driver.need_byteswap_on_be = 1;
312			sgi_driver.need_resampling = 0;
313
314	stargo	1255	if (options)
315			{
316			sgi_output_device = xstrdup(options);
317			}
318			return &sgi_driver;
319			}