trunk/rdesktop/rdpsnd_sgi.c

/* 
   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 voidfoo@cwazy.co.uk 2004

   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

#define MAX_QUEUE       10

int g_dsp_fd;
ALconfig audioconfig;
ALport output_port;

BOOL g_dsp_busy = False;
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;

static struct audio_packet
{
        struct stream s;
        uint16 tick;
        uint8 index;
} packet_queue[MAX_QUEUE];
static unsigned int queue_hi, queue_lo;

BOOL
wave_out_open(void)
{
        ALparamInfo pinfo;

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

        if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0)
        {
                fprintf(stderr, "wave_out_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, "wave_out_open: minvol = %lf, maxvol= %lf, range = %lf.\n",
                min_volume, max_volume, volume_range);
#endif

        queue_lo = queue_hi = 0;

        audioconfig = alNewConfig();
        if (audioconfig < 0)
        {
                fprintf(stderr, "wave_out_open: alNewConfig failed: %s\n",
                        alGetErrorString(oserror()));
                return False;
        }

        output_port = alOpenPort("rdpsnd", "w", 0);
        if (output_port == (ALport) 0)
        {
                fprintf(stderr, "wave_out_open: alOpenPort failed: %s\n",
                        alGetErrorString(oserror()));
                return False;
        }

#if (defined(IRIX_DEBUG))
        fprintf(stderr, "wave_out_open: returning\n");
#endif
        return True;
}

void
wave_out_close(void)
{
        /* Ack all remaining packets */
#if (defined(IRIX_DEBUG))
        fprintf(stderr, "wave_out_close: begin\n");
#endif

        while (queue_lo != queue_hi)
        {
                rdpsnd_send_completion(packet_queue[queue_lo].tick, packet_queue[queue_lo].index);
                free(packet_queue[queue_lo].s.data);
                queue_lo = (queue_lo + 1) % MAX_QUEUE;
        }
        alDiscardFrames(output_port, 0);

        alClosePort(output_port);
        alFreeConfig(audioconfig);
#if (defined(IRIX_DEBUG))
        fprintf(stderr, "wave_out_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, "wave_out_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, "wave_out_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, "wave_out_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, "wave_out_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, "wave_out_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, "wave_out_volume: alSetParams failed: %s\n",
                        alGetErrorString(oserror()));
                return;
        }

#if (defined(IRIX_DEBUG))
        fprintf(stderr, "wave_out_volume: returning\n");
#endif
}

void
wave_out_write(STREAM s, uint16 tick, uint8 index)
{
        struct audio_packet *packet = &packet_queue[queue_hi];
        unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;

        if (next_hi == queue_lo)
        {
                fprintf(stderr, "No space to queue audio packet\n");
                return;
        }

        queue_hi = next_hi;

        packet->s = *s;
        packet->tick = tick;
        packet->index = index;
        packet->s.p += 4;

        /* we steal the data buffer from s, give it a new one */
        s->data = malloc(s->size);

        if (!g_dsp_busy)
                wave_out_play();
}

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 (queue_lo == queue_hi)
                {
                        g_dsp_busy = False;
                        return;
                }

                packet = &packet_queue[queue_lo];
                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);
                                free(out->data);
                                queue_lo = (queue_lo + 1) % MAX_QUEUE;
                                swapped = False;
                        }
                        else
                        {
#if (defined(IRIX_DEBUG))
/*                              fprintf(stderr,"Busy playing...\n"); */
#endif
                                g_dsp_busy = True;
                                return;
                        }
                }
        }
}
1	stargo	744	/*
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	stargo	784	Copyright (C) Jeremy Meng voidfoo@cwazy.co.uk 2004
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			#define IRIX_DEBUG 1
28
29			#define IRIX_MAX_VOL 65535
30
31			#define MAX_QUEUE 10
32
33			int g_dsp_fd;
34			ALconfig audioconfig;
35			ALport output_port;
36
37			BOOL g_dsp_busy = False;
38			static BOOL g_swapaudio;
39			static int g_snd_rate;
40			static BOOL g_swapaudio;
41			static int width = AL_SAMPLE_16;
42
43			double min_volume, max_volume, volume_range;
44			int resource, maxFillable;
45			int combinedFrameSize;
46
47			static struct audio_packet
48			{
49			struct stream s;
50			uint16 tick;
51			uint8 index;
52			} packet_queue[MAX_QUEUE];
53			static unsigned int queue_hi, queue_lo;
54
55			BOOL
56			wave_out_open(void)
57			{
58	astrand	746	ALparamInfo pinfo;
59	stargo	744
60			#if (defined(IRIX_DEBUG))
61	astrand	746	fprintf(stderr, "wave_out_open: begin\n");
62	stargo	744	#endif
63
64	astrand	746	if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0)
65			{
66			fprintf(stderr, "wave_out_open: alGetParamInfo failed: %s\n",
67			alGetErrorString(oserror()));
68			}
69			min_volume = alFixedToDouble(pinfo.min.ll);
70			max_volume = alFixedToDouble(pinfo.max.ll);
71			volume_range = (max_volume - min_volume);
72	stargo	744	#if (defined(IRIX_DEBUG))
73	astrand	746	fprintf(stderr, "wave_out_open: minvol = %lf, maxvol= %lf, range = %lf.\n",
74			min_volume, max_volume, volume_range);
75	stargo	744	#endif
76
77			queue_lo = queue_hi = 0;
78
79			audioconfig = alNewConfig();
80	astrand	746	if (audioconfig < 0)
81			{
82			fprintf(stderr, "wave_out_open: alNewConfig failed: %s\n",
83			alGetErrorString(oserror()));
84	stargo	744	return False;
85			}
86
87			output_port = alOpenPort("rdpsnd", "w", 0);
88	astrand	746	if (output_port == (ALport) 0)
89			{
90			fprintf(stderr, "wave_out_open: alOpenPort failed: %s\n",
91			alGetErrorString(oserror()));
92	stargo	744	return False;
93			}
94
95			#if (defined(IRIX_DEBUG))
96	astrand	746	fprintf(stderr, "wave_out_open: returning\n");
97	stargo	744	#endif
98			return True;
99			}
100
101			void
102			wave_out_close(void)
103			{
104			/* Ack all remaining packets */
105			#if (defined(IRIX_DEBUG))
106	astrand	746	fprintf(stderr, "wave_out_close: begin\n");
107	stargo	744	#endif
108	astrand	746
109	stargo	744	while (queue_lo != queue_hi)
110			{
111			rdpsnd_send_completion(packet_queue[queue_lo].tick, packet_queue[queue_lo].index);
112			free(packet_queue[queue_lo].s.data);
113			queue_lo = (queue_lo + 1) % MAX_QUEUE;
114			}
115	astrand	746	alDiscardFrames(output_port, 0);
116
117	stargo	744	alClosePort(output_port);
118			alFreeConfig(audioconfig);
119			#if (defined(IRIX_DEBUG))
120	astrand	746	fprintf(stderr, "wave_out_close: returning\n");
121	stargo	744	#endif
122			}
123
124			BOOL
125			wave_out_format_supported(WAVEFORMATEX * pwfx)
126			{
127			if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
128			return False;
129			if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
130			return False;
131			if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
132			return False;
133
134			return True;
135			}
136
137			BOOL
138			wave_out_set_format(WAVEFORMATEX * pwfx)
139			{
140			int channels;
141	astrand	746	int frameSize, channelCount;
142			ALpv params;
143
144	stargo	744	#if (defined(IRIX_DEBUG))
145	astrand	746	fprintf(stderr, "wave_out_set_format: init...\n");
146	stargo	744	#endif
147
148			g_swapaudio = False;
149			if (pwfx->wBitsPerSample == 8)
150			width = AL_SAMPLE_8;
151	astrand	746	else if (pwfx->wBitsPerSample == 16)
152			{
153	stargo	744	width = AL_SAMPLE_16;
154			/* Do we need to swap the 16bit values? (Are we BigEndian) */
155	stargo	897	#if (defined(B_ENDIAN))
156	stargo	744	g_swapaudio = 1;
157			#else
158			g_swapaudio = 0;
159			#endif
160			}
161
162	stargo	897	/* Limited support to configure an opened audio port in IRIX The
163			number of channels is a static setting and can not be changed after
164			a port is opened. So if the number of channels remains the same, we
165			can configure other settings Otherwise we have to reopen the audio
166			port, using same config. */
167
168	stargo	744	channels = pwfx->nChannels;
169			g_snd_rate = pwfx->nSamplesPerSec;
170
171			alSetSampFmt(audioconfig, AL_SAMPFMT_TWOSCOMP);
172			alSetWidth(audioconfig, width);
173	stargo	897	if ( channels != alGetChannels(audioconfig) )
174			{
175			alClosePort(output_port);
176			alSetChannels(audioconfig, channels);
177			output_port = alOpenPort("rdpsnd", "w", audioconfig);
178	stargo	744
179	stargo	897	if (output_port == (ALport) 0)
180			{
181			fprintf(stderr, "wave_out_set_format: alOpenPort failed: %s\n",
182			alGetErrorString(oserror()));
183			return False;
184			}
185	stargo	744
186			}
187
188			resource = alGetResource(output_port);
189			maxFillable = alGetFillable(output_port);
190	astrand	746	channelCount = alGetChannels(audioconfig);
191			frameSize = alGetWidth(audioconfig);
192	stargo	744
193	astrand	746	if (frameSize == 0 \|\| channelCount == 0)
194			{
195			fprintf(stderr, "wave_out_set_format: bad frameSize or channelCount\n");
196			return False;
197			}
198			combinedFrameSize = frameSize * channelCount;
199	stargo	744
200	astrand	746	params.param = AL_RATE;
201			params.value.ll = (long long) g_snd_rate << 32;
202	stargo	744
203	astrand	746	if (alSetParams(resource, &params, 1) < 0)
204			{
205			fprintf(stderr, "wave_set_format: alSetParams failed: %s\n",
206			alGetErrorString(oserror()));
207			return False;
208			}
209			if (params.sizeOut < 0)
210			{
211			fprintf(stderr, "wave_set_format: invalid rate %d\n", g_snd_rate);
212			return False;
213			}
214	stargo	744
215			#if (defined(IRIX_DEBUG))
216	astrand	746	fprintf(stderr, "wave_out_set_format: returning...\n");
217	stargo	744	#endif
218			return True;
219			}
220
221			void
222			wave_out_volume(uint16 left, uint16 right)
223			{
224	astrand	746	double gainleft, gainright;
225			ALpv pv[1];
226			ALfixed gain[8];
227	stargo	744
228			#if (defined(IRIX_DEBUG))
229	astrand	746	fprintf(stderr, "wave_out_volume: begin\n");
230			fprintf(stderr, "left='%d', right='%d'\n", left, right);
231	stargo	744	#endif
232	astrand	746
233			gainleft = (double) left / IRIX_MAX_VOL;
234	stargo	744	gainright = (double) right / IRIX_MAX_VOL;
235
236	astrand	746	gain[0] = alDoubleToFixed(min_volume + gainleft * volume_range);
237			gain[1] = alDoubleToFixed(min_volume + gainright * volume_range);
238	stargo	744
239	astrand	746	pv[0].param = AL_GAIN;
240			pv[0].value.ptr = gain;
241			pv[0].sizeIn = 8;
242			if (alSetParams(AL_DEFAULT_OUTPUT, pv, 1) < 0)
243			{
244			fprintf(stderr, "wave_out_volume: alSetParams failed: %s\n",
245			alGetErrorString(oserror()));
246			return;
247			}
248	stargo	744
249			#if (defined(IRIX_DEBUG))
250	astrand	746	fprintf(stderr, "wave_out_volume: returning\n");
251	stargo	744	#endif
252			}
253
254			void
255			wave_out_write(STREAM s, uint16 tick, uint8 index)
256			{
257			struct audio_packet *packet = &packet_queue[queue_hi];
258			unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;
259
260			if (next_hi == queue_lo)
261			{
262			fprintf(stderr, "No space to queue audio packet\n");
263			return;
264			}
265
266			queue_hi = next_hi;
267
268			packet->s = *s;
269			packet->tick = tick;
270			packet->index = index;
271			packet->s.p += 4;
272
273			/* we steal the data buffer from s, give it a new one */
274			s->data = malloc(s->size);
275
276			if (!g_dsp_busy)
277			wave_out_play();
278			}
279
280			void
281			wave_out_play(void)
282			{
283			struct audio_packet *packet;
284			ssize_t len;
285			unsigned int i;
286			uint8 swap;
287			STREAM out;
288			static BOOL swapped = False;
289			int gf;
290
291			while (1)
292			{
293			if (queue_lo == queue_hi)
294			{
295			g_dsp_busy = False;
296			return;
297			}
298
299			packet = &packet_queue[queue_lo];
300			out = &packet->s;
301
302			/* Swap the current packet, but only once */
303			if (g_swapaudio && !swapped)
304			{
305			for (i = 0; i < out->end - out->p; i += 2)
306			{
307			swap = *(out->p + i);
308			(out->p + i) = (out->p + i + 1);
309			*(out->p + i + 1) = swap;
310			}
311			swapped = True;
312			}
313
314			len = out->end - out->p;
315
316	astrand	746	alWriteFrames(output_port, out->p, len / combinedFrameSize);
317	stargo	744
318			out->p += len;
319			if (out->p == out->end)
320			{
321	stargo	897	gf = alGetFilled(output_port);
322			if ( gf < (4 * maxFillable / 10) )
323	stargo	744	{
324			rdpsnd_send_completion(packet->tick, packet->index);
325			free(out->data);
326			queue_lo = (queue_lo + 1) % MAX_QUEUE;
327			swapped = False;
328			}
329			else
330			{
331			#if (defined(IRIX_DEBUG))
332	stargo	897	/* fprintf(stderr,"Busy playing...\n"); */
333	stargo	744	#endif
334			g_dsp_busy = True;
335			return;
336			}
337			}
338			}
339			}