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	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 BOOL g_swapaudio;
35			static int g_snd_rate;
36			static BOOL g_swapaudio;
37			static int width = AL_SAMPLE_16;
38	stargo	1255	static char *sgi_output_device = NULL;
39	stargo	744
40			double min_volume, max_volume, volume_range;
41			int resource, maxFillable;
42			int combinedFrameSize;
43
44			BOOL
45	stargo	1255	sgi_open(void)
46	stargo	744	{
47	astrand	746	ALparamInfo pinfo;
48	stargo	1255	static int warned = 0;
49	stargo	744
50			#if (defined(IRIX_DEBUG))
51	stargo	1254	fprintf(stderr, "sgi_open: begin\n");
52	stargo	744	#endif
53
54	stargo	1255	if (!warned && sgi_output_device)
55			{
56			warning("device-options not supported for libao-driver\n");
57			warned = 1;
58			}
59
60	astrand	746	if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0)
61			{
62	stargo	1254	fprintf(stderr, "sgi_open: alGetParamInfo failed: %s\n",
63	astrand	746	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	stargo	744	#if (defined(IRIX_DEBUG))
69	stargo	1254	fprintf(stderr, "sgi_open: minvol = %lf, maxvol= %lf, range = %lf.\n",
70	astrand	746	min_volume, max_volume, volume_range);
71	stargo	744	#endif
72
73	stargo	1254	rdpsnd_queue_init();
74	stargo	744
75			audioconfig = alNewConfig();
76	stargo	912	if (audioconfig == (ALconfig) 0)
77	astrand	746	{
78	stargo	1254	fprintf(stderr, "sgi_open: alNewConfig failed: %s\n", alGetErrorString(oserror()));
79	stargo	744	return False;
80			}
81
82			output_port = alOpenPort("rdpsnd", "w", 0);
83	astrand	746	if (output_port == (ALport) 0)
84			{
85	stargo	1254	fprintf(stderr, "sgi_open: alOpenPort failed: %s\n", alGetErrorString(oserror()));
86	stargo	744	return False;
87			}
88
89			#if (defined(IRIX_DEBUG))
90	stargo	1254	fprintf(stderr, "sgi_open: returning\n");
91	stargo	744	#endif
92			return True;
93			}
94
95			void
96	stargo	1255	sgi_close(void)
97	stargo	744	{
98			/* Ack all remaining packets */
99			#if (defined(IRIX_DEBUG))
100	stargo	1254	fprintf(stderr, "sgi_close: begin\n");
101	stargo	744	#endif
102	astrand	746
103	stargo	1254	while (!rdpsnd_queue_empty())
104	stargo	744	{
105	stargo	1254	/* 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	stargo	744	}
111	astrand	746	alDiscardFrames(output_port, 0);
112
113	stargo	744	alClosePort(output_port);
114			alFreeConfig(audioconfig);
115			#if (defined(IRIX_DEBUG))
116	stargo	1254	fprintf(stderr, "sgi_close: returning\n");
117	stargo	744	#endif
118			}
119
120			BOOL
121	stargo	1255	sgi_format_supported(WAVEFORMATEX * pwfx)
122	stargo	744	{
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	stargo	1255	sgi_set_format(WAVEFORMATEX * pwfx)
135	stargo	744	{
136			int channels;
137	astrand	746	int frameSize, channelCount;
138			ALpv params;
139
140	stargo	744	#if (defined(IRIX_DEBUG))
141	stargo	1254	fprintf(stderr, "sgi_set_format: init...\n");
142	stargo	744	#endif
143
144			g_swapaudio = False;
145			if (pwfx->wBitsPerSample == 8)
146			width = AL_SAMPLE_8;
147	astrand	746	else if (pwfx->wBitsPerSample == 16)
148			{
149	stargo	744	width = AL_SAMPLE_16;
150			/* Do we need to swap the 16bit values? (Are we BigEndian) */
151	stargo	897	#if (defined(B_ENDIAN))
152	stargo	744	g_swapaudio = 1;
153			#else
154			g_swapaudio = 0;
155			#endif
156			}
157
158	stargo	912	/* Limited support to configure an opened audio port in IRIX. The
159	astrand	909	number of channels is a static setting and can not be changed after
160	stargo	912	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	astrand	909	port, using same config. */
163	stargo	897
164	stargo	744	channels = pwfx->nChannels;
165			g_snd_rate = pwfx->nSamplesPerSec;
166
167			alSetSampFmt(audioconfig, AL_SAMPFMT_TWOSCOMP);
168			alSetWidth(audioconfig, width);
169	astrand	909	if (channels != alGetChannels(audioconfig))
170	stargo	897	{
171			alClosePort(output_port);
172			alSetChannels(audioconfig, channels);
173			output_port = alOpenPort("rdpsnd", "w", audioconfig);
174	stargo	744
175	stargo	897	if (output_port == (ALport) 0)
176			{
177	stargo	1254	fprintf(stderr, "sgi_set_format: alOpenPort failed: %s\n",
178	astrand	909	alGetErrorString(oserror()));
179	stargo	897	return False;
180			}
181	stargo	744
182			}
183
184			resource = alGetResource(output_port);
185			maxFillable = alGetFillable(output_port);
186	astrand	746	channelCount = alGetChannels(audioconfig);
187			frameSize = alGetWidth(audioconfig);
188	stargo	744
189	astrand	746	if (frameSize == 0 \|\| channelCount == 0)
190			{
191	stargo	1254	fprintf(stderr, "sgi_set_format: bad frameSize or channelCount\n");
192	astrand	746	return False;
193			}
194			combinedFrameSize = frameSize * channelCount;
195	stargo	744
196	astrand	746	params.param = AL_RATE;
197			params.value.ll = (long long) g_snd_rate << 32;
198	stargo	744
199	astrand	746	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	stargo	744
211			#if (defined(IRIX_DEBUG))
212	stargo	1254	fprintf(stderr, "sgi_set_format: returning...\n");
213	stargo	744	#endif
214			return True;
215			}
216
217			void
218	stargo	1255	sgi_volume(uint16 left, uint16 right)
219	stargo	744	{
220	astrand	746	double gainleft, gainright;
221			ALpv pv[1];
222			ALfixed gain[8];
223	stargo	744
224			#if (defined(IRIX_DEBUG))
225	stargo	1254	fprintf(stderr, "sgi_volume: begin\n");
226	astrand	746	fprintf(stderr, "left='%d', right='%d'\n", left, right);
227	stargo	744	#endif
228	astrand	746
229			gainleft = (double) left / IRIX_MAX_VOL;
230	stargo	744	gainright = (double) right / IRIX_MAX_VOL;
231
232	astrand	746	gain[0] = alDoubleToFixed(min_volume + gainleft * volume_range);
233			gain[1] = alDoubleToFixed(min_volume + gainright * volume_range);
234	stargo	744
235	astrand	746	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	stargo	1254	fprintf(stderr, "sgi_volume: alSetParams failed: %s\n",
241	astrand	746	alGetErrorString(oserror()));
242			return;
243			}
244	stargo	744
245			#if (defined(IRIX_DEBUG))
246	stargo	1254	fprintf(stderr, "sgi_volume: returning\n");
247	stargo	744	#endif
248			}
249
250			void
251	stargo	1255	sgi_play(void)
252	stargo	744	{
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	stargo	1254	if (rdpsnd_queue_empty())
264	stargo	744	{
265			g_dsp_busy = False;
266			return;
267			}
268
269	stargo	1254	packet = rdpsnd_queue_current_packet();
270	stargo	744	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	astrand	746	alWriteFrames(output_port, out->p, len / combinedFrameSize);
287	stargo	744
288			out->p += len;
289			if (out->p == out->end)
290			{
291	stargo	897	gf = alGetFilled(output_port);
292	astrand	909	if (gf < (4 * maxFillable / 10))
293	stargo	744	{
294			rdpsnd_send_completion(packet->tick, packet->index);
295	stargo	1254	rdpsnd_queue_next();
296	stargo	744	swapped = False;
297			}
298			else
299			{
300			#if (defined(IRIX_DEBUG))
301	stargo	897	/* fprintf(stderr,"Busy playing...\n"); */
302	stargo	744	#endif
303			g_dsp_busy = True;
304	astrand	1032	usleep(10);
305	stargo	744	return;
306			}
307			}
308			}
309			}
310	stargo	1255
311			struct audio_driver *
312			sgi_register(char *options)
313			{
314	stargo	1256	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	stargo	1255	if (options)
328			{
329			sgi_output_device = xstrdup(options);
330			}
331			return &sgi_driver;
332			}