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
   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

        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);
        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_queue_next(0);
                        }
                        else
                        {
#if (defined(IRIX_DEBUG))
/*                              fprintf(stderr,"Busy playing...\n"); */
#endif
                                g_dsp_busy = True;
                                usleep(10);
                                return;
                        }
                }
        }
}

static struct audio_driver sgi_driver = {
        .name = "sgi",
        .description = "SGI output driver",

        .wave_out_open = sgi_open,
        .wave_out_close = sgi_close,
        .wave_out_format_supported = sgi_format_supported,
        .wave_out_set_format = sgi_set_format,
        .wave_out_volume = sgi_volume,
        .wave_out_play = sgi_play,

        .need_byteswap_on_be = 1,
        .need_resampling = 0,
};

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