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 2003-2008
   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... */
        if (output_port != (ALport) 0 && !rdpsnd_queue_empty())
                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();
}

RD_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
}

RD_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;
}

RD_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	jsorg71	1475	Copyright (C) Matthew Chapman 2003-2008
5	stargo	744	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	stargo	1422	if (output_port != (ALport) 0 && !rdpsnd_queue_empty())
49			FD_SET(0, wfds);
50	ossman_	1346	}
51
52			void
53			sgi_check_fds(fd_set * rfds, fd_set * wfds)
54			{
55			if (output_port == (ALport) 0)
56			return;
57
58			if (!rdpsnd_queue_empty())
59			sgi_play();
60			}
61
62	jsorg71	1372	RD_BOOL
63	stargo	1255	sgi_open(void)
64	stargo	744	{
65	astrand	746	ALparamInfo pinfo;
66	stargo	1255	static int warned = 0;
67	stargo	744
68			#if (defined(IRIX_DEBUG))
69	stargo	1254	fprintf(stderr, "sgi_open: begin\n");
70	stargo	744	#endif
71
72	stargo	1255	if (!warned && sgi_output_device)
73			{
74			warning("device-options not supported for libao-driver\n");
75			warned = 1;
76			}
77
78	astrand	746	if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0)
79			{
80	stargo	1254	fprintf(stderr, "sgi_open: alGetParamInfo failed: %s\n",
81	astrand	746	alGetErrorString(oserror()));
82			}
83			min_volume = alFixedToDouble(pinfo.min.ll);
84			max_volume = alFixedToDouble(pinfo.max.ll);
85			volume_range = (max_volume - min_volume);
86	stargo	744	#if (defined(IRIX_DEBUG))
87	stargo	1254	fprintf(stderr, "sgi_open: minvol = %lf, maxvol= %lf, range = %lf.\n",
88	astrand	746	min_volume, max_volume, volume_range);
89	stargo	744	#endif
90
91			audioconfig = alNewConfig();
92	stargo	912	if (audioconfig == (ALconfig) 0)
93	astrand	746	{
94	stargo	1254	fprintf(stderr, "sgi_open: alNewConfig failed: %s\n", alGetErrorString(oserror()));
95	stargo	744	return False;
96			}
97
98			output_port = alOpenPort("rdpsnd", "w", 0);
99	astrand	746	if (output_port == (ALport) 0)
100			{
101	stargo	1254	fprintf(stderr, "sgi_open: alOpenPort failed: %s\n", alGetErrorString(oserror()));
102	stargo	744	return False;
103			}
104
105			#if (defined(IRIX_DEBUG))
106	stargo	1254	fprintf(stderr, "sgi_open: returning\n");
107	stargo	744	#endif
108			return True;
109			}
110
111			void
112	stargo	1255	sgi_close(void)
113	stargo	744	{
114			/* Ack all remaining packets */
115			#if (defined(IRIX_DEBUG))
116	stargo	1254	fprintf(stderr, "sgi_close: begin\n");
117	stargo	744	#endif
118	astrand	746
119	stargo	1254	while (!rdpsnd_queue_empty())
120	ossman_	1304	rdpsnd_queue_next(0);
121	astrand	746	alDiscardFrames(output_port, 0);
122
123	stargo	744	alClosePort(output_port);
124	ossman_	1346	output_port = (ALport) 0;
125	stargo	744	alFreeConfig(audioconfig);
126			#if (defined(IRIX_DEBUG))
127	stargo	1254	fprintf(stderr, "sgi_close: returning\n");
128	stargo	744	#endif
129			}
130
131	jsorg71	1372	RD_BOOL
132	jsorg71	1364	sgi_format_supported(RD_WAVEFORMATEX * pwfx)
133	stargo	744	{
134			if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
135			return False;
136			if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
137			return False;
138			if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
139			return False;
140
141			return True;
142			}
143
144	jsorg71	1372	RD_BOOL
145	jsorg71	1364	sgi_set_format(RD_WAVEFORMATEX * pwfx)
146	stargo	744	{
147			int channels;
148	astrand	746	int frameSize, channelCount;
149			ALpv params;
150
151	stargo	744	#if (defined(IRIX_DEBUG))
152	stargo	1254	fprintf(stderr, "sgi_set_format: init...\n");
153	stargo	744	#endif
154
155			if (pwfx->wBitsPerSample == 8)
156			width = AL_SAMPLE_8;
157	astrand	746	else if (pwfx->wBitsPerSample == 16)
158	stargo	744	width = AL_SAMPLE_16;
159
160	stargo	912	/* Limited support to configure an opened audio port in IRIX. The
161	astrand	909	number of channels is a static setting and can not be changed after
162	stargo	912	a port is opened. So if the number of channels remains the same, we
163			can configure other settings; otherwise we have to reopen the audio
164	astrand	909	port, using same config. */
165	stargo	897
166	stargo	744	channels = pwfx->nChannels;
167			g_snd_rate = pwfx->nSamplesPerSec;
168
169			alSetSampFmt(audioconfig, AL_SAMPFMT_TWOSCOMP);
170			alSetWidth(audioconfig, width);
171	astrand	909	if (channels != alGetChannels(audioconfig))
172	stargo	897	{
173			alClosePort(output_port);
174			alSetChannels(audioconfig, channels);
175			output_port = alOpenPort("rdpsnd", "w", audioconfig);
176	stargo	744
177	stargo	897	if (output_port == (ALport) 0)
178			{
179	stargo	1254	fprintf(stderr, "sgi_set_format: alOpenPort failed: %s\n",
180	astrand	909	alGetErrorString(oserror()));
181	stargo	897	return False;
182			}
183	stargo	744
184			}
185
186			resource = alGetResource(output_port);
187			maxFillable = alGetFillable(output_port);
188	astrand	746	channelCount = alGetChannels(audioconfig);
189			frameSize = alGetWidth(audioconfig);
190	stargo	744
191	astrand	746	if (frameSize == 0 \|\| channelCount == 0)
192			{
193	stargo	1254	fprintf(stderr, "sgi_set_format: bad frameSize or channelCount\n");
194	astrand	746	return False;
195			}
196			combinedFrameSize = frameSize * channelCount;
197	stargo	744
198	astrand	746	params.param = AL_RATE;
199			params.value.ll = (long long) g_snd_rate << 32;
200	stargo	744
201	astrand	746	if (alSetParams(resource, &params, 1) < 0)
202			{
203			fprintf(stderr, "wave_set_format: alSetParams failed: %s\n",
204			alGetErrorString(oserror()));
205			return False;
206			}
207			if (params.sizeOut < 0)
208			{
209			fprintf(stderr, "wave_set_format: invalid rate %d\n", g_snd_rate);
210			return False;
211			}
212	stargo	744
213			#if (defined(IRIX_DEBUG))
214	stargo	1254	fprintf(stderr, "sgi_set_format: returning...\n");
215	stargo	744	#endif
216			return True;
217			}
218
219			void
220	stargo	1255	sgi_volume(uint16 left, uint16 right)
221	stargo	744	{
222	astrand	746	double gainleft, gainright;
223			ALpv pv[1];
224			ALfixed gain[8];
225	stargo	744
226			#if (defined(IRIX_DEBUG))
227	stargo	1254	fprintf(stderr, "sgi_volume: begin\n");
228	astrand	746	fprintf(stderr, "left='%d', right='%d'\n", left, right);
229	stargo	744	#endif
230	astrand	746
231			gainleft = (double) left / IRIX_MAX_VOL;
232	stargo	744	gainright = (double) right / IRIX_MAX_VOL;
233
234	astrand	746	gain[0] = alDoubleToFixed(min_volume + gainleft * volume_range);
235			gain[1] = alDoubleToFixed(min_volume + gainright * volume_range);
236	stargo	744
237	astrand	746	pv[0].param = AL_GAIN;
238			pv[0].value.ptr = gain;
239			pv[0].sizeIn = 8;
240			if (alSetParams(AL_DEFAULT_OUTPUT, pv, 1) < 0)
241			{
242	stargo	1254	fprintf(stderr, "sgi_volume: alSetParams failed: %s\n",
243	astrand	746	alGetErrorString(oserror()));
244			return;
245			}
246	stargo	744
247			#if (defined(IRIX_DEBUG))
248	stargo	1254	fprintf(stderr, "sgi_volume: returning\n");
249	stargo	744	#endif
250			}
251
252			void
253	stargo	1255	sgi_play(void)
254	stargo	744	{
255			struct audio_packet *packet;
256			ssize_t len;
257			unsigned int i;
258			STREAM out;
259			int gf;
260
261			while (1)
262			{
263	stargo	1254	if (rdpsnd_queue_empty())
264	stargo	744	return;
265
266	stargo	1254	packet = rdpsnd_queue_current_packet();
267	stargo	744	out = &packet->s;
268
269			len = out->end - out->p;
270
271	astrand	746	alWriteFrames(output_port, out->p, len / combinedFrameSize);
272	stargo	744
273			out->p += len;
274			if (out->p == out->end)
275			{
276	stargo	897	gf = alGetFilled(output_port);
277	astrand	909	if (gf < (4 * maxFillable / 10))
278	stargo	744	{
279	ossman_	1302	rdpsnd_queue_next(0);
280	stargo	744	}
281			else
282			{
283			#if (defined(IRIX_DEBUG))
284	stargo	897	/* fprintf(stderr,"Busy playing...\n"); */
285	stargo	744	#endif
286	astrand	1032	usleep(10);
287	stargo	744	return;
288			}
289			}
290			}
291			}
292	stargo	1255
293	stargo	1351	struct audio_driver *
294			sgi_register(char *options)
295			{
296			static struct audio_driver sgi_driver;
297	ossman_	1345
298	ossman_	1356	memset(&sgi_driver, 0, sizeof(sgi_driver));
299	ossman_	1346
300	ossman_	1356	sgi_driver.name = "sgi";
301			sgi_driver.description = "SGI output driver";
302
303	stargo	1351	sgi_driver.add_fds = sgi_add_fds;
304			sgi_driver.check_fds = sgi_check_fds;
305	ossman_	1345
306	stargo	1351	sgi_driver.wave_out_open = sgi_open;
307			sgi_driver.wave_out_close = sgi_close;
308			sgi_driver.wave_out_format_supported = sgi_format_supported;
309			sgi_driver.wave_out_set_format = sgi_set_format;
310			sgi_driver.wave_out_volume = sgi_volume;
311	ossman_	1345
312	stargo	1351	sgi_driver.need_byteswap_on_be = 1;
313			sgi_driver.need_resampling = 0;
314
315	stargo	1255	if (options)
316			{
317			sgi_output_device = xstrdup(options);
318			}
319			return &sgi_driver;
320			}