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 BOOL g_swapaudio;
static int g_snd_rate;
static BOOL g_swapaudio;
static int width = AL_SAMPLE_16;

double min_volume, max_volume, volume_range;
int resource, maxFillable;
int combinedFrameSize;

BOOL
wave_out_open(void)
{
        ALparamInfo pinfo;

#if (defined(IRIX_DEBUG))
        fprintf(stderr, "sgi_open: begin\n");
#endif

        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
wave_out_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
wave_out_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
wave_out_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
wave_out_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
wave_out_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;
                        }
                }
        }
}
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 BOOL g_swapaudio;
35	static int g_snd_rate;
36	static BOOL g_swapaudio;
37	static int width = AL_SAMPLE_16;
38
39	double min_volume, max_volume, volume_range;
40	int resource, maxFillable;
41	int combinedFrameSize;
42
43	BOOL
44	wave_out_open(void)
45	{
46	ALparamInfo pinfo;
47
48	#if (defined(IRIX_DEBUG))
49	fprintf(stderr, "sgi_open: begin\n");
50	#endif
51
52	if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0)
53	{
54	fprintf(stderr, "sgi_open: alGetParamInfo failed: %s\n",
55	alGetErrorString(oserror()));
56	}
57	min_volume = alFixedToDouble(pinfo.min.ll);
58	max_volume = alFixedToDouble(pinfo.max.ll);
59	volume_range = (max_volume - min_volume);
60	#if (defined(IRIX_DEBUG))
61	fprintf(stderr, "sgi_open: minvol = %lf, maxvol= %lf, range = %lf.\n",
62	min_volume, max_volume, volume_range);
63	#endif
64
65	rdpsnd_queue_init();
66
67	audioconfig = alNewConfig();
68	if (audioconfig == (ALconfig) 0)
69	{
70	fprintf(stderr, "sgi_open: alNewConfig failed: %s\n", alGetErrorString(oserror()));
71	return False;
72	}
73
74	output_port = alOpenPort("rdpsnd", "w", 0);
75	if (output_port == (ALport) 0)
76	{
77	fprintf(stderr, "sgi_open: alOpenPort failed: %s\n", alGetErrorString(oserror()));
78	return False;
79	}
80
81	#if (defined(IRIX_DEBUG))
82	fprintf(stderr, "sgi_open: returning\n");
83	#endif
84	return True;
85	}
86
87	void
88	wave_out_close(void)
89	{
90	/* Ack all remaining packets */
91	#if (defined(IRIX_DEBUG))
92	fprintf(stderr, "sgi_close: begin\n");
93	#endif
94
95	while (!rdpsnd_queue_empty())
96	{
97	/* We need to add 50 to tell windows that time has passed while
98	* playing this packet */
99	rdpsnd_send_completion(rdpsnd_queue_current_packet()->tick + 50,
100	rdpsnd_queue_current_packet()->index);
101	rdpsnd_queue_next();
102	}
103	alDiscardFrames(output_port, 0);
104
105	alClosePort(output_port);
106	alFreeConfig(audioconfig);
107	#if (defined(IRIX_DEBUG))
108	fprintf(stderr, "sgi_close: returning\n");
109	#endif
110	}
111
112	BOOL
113	wave_out_format_supported(WAVEFORMATEX * pwfx)
114	{
115	if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
116	return False;
117	if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
118	return False;
119	if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
120	return False;
121
122	return True;
123	}
124
125	BOOL
126	wave_out_set_format(WAVEFORMATEX * pwfx)
127	{
128	int channels;
129	int frameSize, channelCount;
130	ALpv params;
131
132	#if (defined(IRIX_DEBUG))
133	fprintf(stderr, "sgi_set_format: init...\n");
134	#endif
135
136	g_swapaudio = False;
137	if (pwfx->wBitsPerSample == 8)
138	width = AL_SAMPLE_8;
139	else if (pwfx->wBitsPerSample == 16)
140	{
141	width = AL_SAMPLE_16;
142	/* Do we need to swap the 16bit values? (Are we BigEndian) */
143	#if (defined(B_ENDIAN))
144	g_swapaudio = 1;
145	#else
146	g_swapaudio = 0;
147	#endif
148	}
149
150	/* Limited support to configure an opened audio port in IRIX. The
151	number of channels is a static setting and can not be changed after
152	a port is opened. So if the number of channels remains the same, we
153	can configure other settings; otherwise we have to reopen the audio
154	port, using same config. */
155
156	channels = pwfx->nChannels;
157	g_snd_rate = pwfx->nSamplesPerSec;
158
159	alSetSampFmt(audioconfig, AL_SAMPFMT_TWOSCOMP);
160	alSetWidth(audioconfig, width);
161	if (channels != alGetChannels(audioconfig))
162	{
163	alClosePort(output_port);
164	alSetChannels(audioconfig, channels);
165	output_port = alOpenPort("rdpsnd", "w", audioconfig);
166
167	if (output_port == (ALport) 0)
168	{
169	fprintf(stderr, "sgi_set_format: alOpenPort failed: %s\n",
170	alGetErrorString(oserror()));
171	return False;
172	}
173
174	}
175
176	resource = alGetResource(output_port);
177	maxFillable = alGetFillable(output_port);
178	channelCount = alGetChannels(audioconfig);
179	frameSize = alGetWidth(audioconfig);
180
181	if (frameSize == 0 \|\| channelCount == 0)
182	{
183	fprintf(stderr, "sgi_set_format: bad frameSize or channelCount\n");
184	return False;
185	}
186	combinedFrameSize = frameSize * channelCount;
187
188	params.param = AL_RATE;
189	params.value.ll = (long long) g_snd_rate << 32;
190
191	if (alSetParams(resource, &params, 1) < 0)
192	{
193	fprintf(stderr, "wave_set_format: alSetParams failed: %s\n",
194	alGetErrorString(oserror()));
195	return False;
196	}
197	if (params.sizeOut < 0)
198	{
199	fprintf(stderr, "wave_set_format: invalid rate %d\n", g_snd_rate);
200	return False;
201	}
202
203	#if (defined(IRIX_DEBUG))
204	fprintf(stderr, "sgi_set_format: returning...\n");
205	#endif
206	return True;
207	}
208
209	void
210	wave_out_volume(uint16 left, uint16 right)
211	{
212	double gainleft, gainright;
213	ALpv pv[1];
214	ALfixed gain[8];
215
216	#if (defined(IRIX_DEBUG))
217	fprintf(stderr, "sgi_volume: begin\n");
218	fprintf(stderr, "left='%d', right='%d'\n", left, right);
219	#endif
220
221	gainleft = (double) left / IRIX_MAX_VOL;
222	gainright = (double) right / IRIX_MAX_VOL;
223
224	gain[0] = alDoubleToFixed(min_volume + gainleft * volume_range);
225	gain[1] = alDoubleToFixed(min_volume + gainright * volume_range);
226
227	pv[0].param = AL_GAIN;
228	pv[0].value.ptr = gain;
229	pv[0].sizeIn = 8;
230	if (alSetParams(AL_DEFAULT_OUTPUT, pv, 1) < 0)
231	{
232	fprintf(stderr, "sgi_volume: alSetParams failed: %s\n",
233	alGetErrorString(oserror()));
234	return;
235	}
236
237	#if (defined(IRIX_DEBUG))
238	fprintf(stderr, "sgi_volume: returning\n");
239	#endif
240	}
241
242	void
243	wave_out_play(void)
244	{
245	struct audio_packet *packet;
246	ssize_t len;
247	unsigned int i;
248	uint8 swap;
249	STREAM out;
250	static BOOL swapped = False;
251	int gf;
252
253	while (1)
254	{
255	if (rdpsnd_queue_empty())
256	{
257	g_dsp_busy = False;
258	return;
259	}
260
261	packet = rdpsnd_queue_current_packet();
262	out = &packet->s;
263
264	/* Swap the current packet, but only once */
265	if (g_swapaudio && !swapped)
266	{
267	for (i = 0; i < out->end - out->p; i += 2)
268	{
269	swap = *(out->p + i);
270	(out->p + i) = (out->p + i + 1);
271	*(out->p + i + 1) = swap;
272	}
273	swapped = True;
274	}
275
276	len = out->end - out->p;
277
278	alWriteFrames(output_port, out->p, len / combinedFrameSize);
279
280	out->p += len;
281	if (out->p == out->end)
282	{
283	gf = alGetFilled(output_port);
284	if (gf < (4 * maxFillable / 10))
285	{
286	rdpsnd_send_completion(packet->tick, packet->index);
287	rdpsnd_queue_next();
288	swapped = False;
289	}
290	else
291	{
292	#if (defined(IRIX_DEBUG))
293	/* fprintf(stderr,"Busy playing...\n"); */
294	#endif
295	g_dsp_busy = True;
296	usleep(10);
297	return;
298	}
299	}
300	}
301	}