rdesktop/trunk/rdpsnd_libao.c

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Sound Channel Process Functions - libao-driver
   Copyright (C) Matthew Chapman 2003
   Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
   Copyright (C) Michael Gernoth mike@zerfleddert.de 2005-2006

   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 "rdpsnd.h"
#include "rdpsnd_dsp.h"
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <ao/ao.h>
#include <sys/time.h>

#define WAVEOUTBUF      16

static ao_device *o_device = NULL;
static int default_driver;
static BOOL reopened;
static char *libao_device = NULL;

BOOL
libao_open(void)
{
        ao_sample_format format;

        ao_initialize();

        if (libao_device)
        {
                default_driver = ao_driver_id(libao_device);
        }
        else
        {
                default_driver = ao_default_driver_id();
        }

        format.bits = 16;
        format.channels = 2;
        format.rate = 44100;
        format.byte_format = AO_FMT_LITTLE;

        o_device = ao_open_live(default_driver, &format, NULL);
        if (o_device == NULL)
        {
                return False;
        }

        g_dsp_fd = 0;
        rdpsnd_queue_init();

        reopened = True;

        return True;
}

void
libao_close(void)
{
        /* Ack all remaining packets */
        while (!rdpsnd_queue_empty())
        {
                rdpsnd_send_completion(rdpsnd_queue_current_packet()->tick,
                                       rdpsnd_queue_current_packet()->index);
                rdpsnd_queue_next();
        }

        if (o_device != NULL)
                ao_close(o_device);

        ao_shutdown();
}

BOOL
libao_set_format(WAVEFORMATEX * pwfx)
{
        ao_sample_format format;

        format.bits = pwfx->wBitsPerSample;
        format.channels = pwfx->nChannels;
        format.rate = 44100;
        format.byte_format = AO_FMT_LITTLE;

        if (o_device != NULL)
                ao_close(o_device);

        o_device = ao_open_live(default_driver, &format, NULL);
        if (o_device == NULL)
        {
                return False;
        }

        if (rdpsnd_dsp_resample_set(44100, pwfx->wBitsPerSample, pwfx->nChannels) == False)
        {
                return False;
        }

        reopened = True;

        return True;
}

void
libao_play(void)
{
        struct audio_packet *packet;
        STREAM out;
        int len;
        static long prev_s, prev_us;
        unsigned int duration;
        struct timeval tv;
        int next_tick;

        if (reopened)
        {
                reopened = False;
                gettimeofday(&tv, NULL);
                prev_s = tv.tv_sec;
                prev_us = tv.tv_usec;
        }

        if (rdpsnd_queue_empty())
        {
                g_dsp_busy = 0;
                return;
        }

        packet = rdpsnd_queue_current_packet();
        out = &packet->s;

        next_tick = rdpsnd_queue_next_tick();

        len = (WAVEOUTBUF > (out->end - out->p)) ? (out->end - out->p) : WAVEOUTBUF;
        ao_play(o_device, (char *) out->p, len);
        out->p += len;

        gettimeofday(&tv, NULL);

        duration = ((tv.tv_sec - prev_s) * 1000000 + (tv.tv_usec - prev_us)) / 1000;

        if (packet->tick > next_tick)
                next_tick += 65536;

        if ((out->p == out->end) || duration > next_tick - packet->tick + 500)
        {
                prev_s = tv.tv_sec;
                prev_us = tv.tv_usec;

                if (abs((next_tick - packet->tick) - duration) > 20)
                {
                        DEBUG(("duration: %d, calc: %d, ", duration, next_tick - packet->tick));
                        DEBUG(("last: %d, is: %d, should: %d\n", packet->tick,
                               (packet->tick + duration) % 65536, next_tick % 65536));
                }

                rdpsnd_send_completion(((packet->tick + duration) % 65536), packet->index);
                rdpsnd_queue_next();
        }

        g_dsp_busy = 1;
        return;
}

struct audio_driver *
libao_register(char *options)
{
        static struct audio_driver libao_driver;
        struct ao_info *libao_info;
        static char description[101];

        libao_driver.wave_out_write = rdpsnd_queue_write;
        libao_driver.wave_out_open = libao_open;
        libao_driver.wave_out_close = libao_close;
        libao_driver.wave_out_format_supported = rdpsnd_dsp_resample_supported;
        libao_driver.wave_out_set_format = libao_set_format;
        libao_driver.wave_out_volume = rdpsnd_dsp_softvol_set;
        libao_driver.wave_out_play = libao_play;
        libao_driver.name = xstrdup("libao");
        libao_driver.description = description;
        libao_driver.need_byteswap_on_be = 0;
        libao_driver.next = NULL;

        ao_initialize();

        libao_info = ao_driver_info(ao_default_driver_id());

        if (libao_info)
        {
                snprintf(description, 100, "libao output driver, default device: %s",
                         libao_info->short_name);
        }
        else
        {
                snprintf(description, 100, "libao output driver, default device: none");
        }

        ao_shutdown();

        if (options)
        {
                libao_device = xstrdup(options);
        }

        return &libao_driver;
}
1	astrand	963	/* -- c-basic-offset: 8 --
2	stargo	833	rdesktop: A Remote Desktop Protocol client.
3			Sound Channel Process Functions - libao-driver
4			Copyright (C) Matthew Chapman 2003
5			Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
6	stargo	1254	Copyright (C) Michael Gernoth mike@zerfleddert.de 2005-2006
7	stargo	833
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	stargo	1254	#include "rdpsnd.h"
25	stargo	1258	#include "rdpsnd_dsp.h"
26	stargo	833	#include <unistd.h>
27			#include <fcntl.h>
28			#include <errno.h>
29			#include <ao/ao.h>
30	stargo	891	#include <sys/time.h>
31	stargo	833
32	stargo	1045	#define WAVEOUTBUF 16
33	stargo	833
34	stargo	1245	static ao_device *o_device = NULL;
35			static int default_driver;
36			static BOOL reopened;
37	stargo	1255	static char *libao_device = NULL;
38	stargo	833
39			BOOL
40	stargo	1255	libao_open(void)
41	stargo	833	{
42			ao_sample_format format;
43
44	stargo	1266	ao_initialize();
45
46			if (libao_device)
47	stargo	1255	{
48	stargo	1266	default_driver = ao_driver_id(libao_device);
49	stargo	1255	}
50	stargo	1266	else
51			{
52			default_driver = ao_default_driver_id();
53			}
54	stargo	1255
55	stargo	833	format.bits = 16;
56			format.channels = 2;
57			format.rate = 44100;
58			format.byte_format = AO_FMT_LITTLE;
59
60			o_device = ao_open_live(default_driver, &format, NULL);
61			if (o_device == NULL)
62			{
63			return False;
64			}
65
66			g_dsp_fd = 0;
67	stargo	1254	rdpsnd_queue_init();
68	stargo	833
69	stargo	1245	reopened = True;
70	stargo	891
71	stargo	833	return True;
72			}
73
74			void
75	stargo	1255	libao_close(void)
76	stargo	833	{
77			/* Ack all remaining packets */
78	stargo	1254	while (!rdpsnd_queue_empty())
79	stargo	833	{
80	stargo	1254	rdpsnd_send_completion(rdpsnd_queue_current_packet()->tick,
81			rdpsnd_queue_current_packet()->index);
82			rdpsnd_queue_next();
83	stargo	833	}
84
85			if (o_device != NULL)
86			ao_close(o_device);
87	stargo	838
88	stargo	833	ao_shutdown();
89			}
90
91			BOOL
92	stargo	1255	libao_set_format(WAVEFORMATEX * pwfx)
93	stargo	833	{
94			ao_sample_format format;
95
96			format.bits = pwfx->wBitsPerSample;
97			format.channels = pwfx->nChannels;
98			format.rate = 44100;
99			format.byte_format = AO_FMT_LITTLE;
100
101	stargo	837	if (o_device != NULL)
102	stargo	833	ao_close(o_device);
103
104			o_device = ao_open_live(default_driver, &format, NULL);
105			if (o_device == NULL)
106			{
107			return False;
108			}
109
110	stargo	1276	if (rdpsnd_dsp_resample_set(44100, pwfx->wBitsPerSample, pwfx->nChannels) == False)
111			{
112			return False;
113			}
114
115	stargo	1245	reopened = True;
116	stargo	833
117			return True;
118			}
119
120			void
121	stargo	1255	libao_play(void)
122	stargo	833	{
123			struct audio_packet *packet;
124			STREAM out;
125	stargo	1276	int len;
126	stargo	891	static long prev_s, prev_us;
127			unsigned int duration;
128			struct timeval tv;
129			int next_tick;
130	stargo	833
131	stargo	1245	if (reopened)
132	stargo	891	{
133	stargo	1245	reopened = False;
134	stargo	891	gettimeofday(&tv, NULL);
135			prev_s = tv.tv_sec;
136			prev_us = tv.tv_usec;
137			}
138
139	stargo	1254	if (rdpsnd_queue_empty())
140	stargo	833	{
141	stargo	835	g_dsp_busy = 0;
142			return;
143			}
144	stargo	833
145	stargo	1254	packet = rdpsnd_queue_current_packet();
146	stargo	835	out = &packet->s;
147	stargo	833
148	stargo	1254	next_tick = rdpsnd_queue_next_tick();
149	stargo	891
150	stargo	1276	len = (WAVEOUTBUF > (out->end - out->p)) ? (out->end - out->p) : WAVEOUTBUF;
151			ao_play(o_device, (char *) out->p, len);
152			out->p += len;
153	stargo	833
154	stargo	891	gettimeofday(&tv, NULL);
155
156			duration = ((tv.tv_sec - prev_s) * 1000000 + (tv.tv_usec - prev_us)) / 1000;
157
158			if (packet->tick > next_tick)
159			next_tick += 65536;
160
161			if ((out->p == out->end) \|\| duration > next_tick - packet->tick + 500)
162	stargo	835	{
163	stargo	891	prev_s = tv.tv_sec;
164			prev_us = tv.tv_usec;
165
166			if (abs((next_tick - packet->tick) - duration) > 20)
167			{
168			DEBUG(("duration: %d, calc: %d, ", duration, next_tick - packet->tick));
169			DEBUG(("last: %d, is: %d, should: %d\n", packet->tick,
170			(packet->tick + duration) % 65536, next_tick % 65536));
171			}
172
173	stargo	1254	rdpsnd_send_completion(((packet->tick + duration) % 65536), packet->index);
174			rdpsnd_queue_next();
175	stargo	835	}
176
177			g_dsp_busy = 1;
178			return;
179	stargo	833	}
180	stargo	1255
181			struct audio_driver *
182			libao_register(char *options)
183			{
184	stargo	1256	static struct audio_driver libao_driver;
185	stargo	1268	struct ao_info *libao_info;
186	stargo	1266	static char description[101];
187	stargo	1256
188			libao_driver.wave_out_write = rdpsnd_queue_write;
189			libao_driver.wave_out_open = libao_open;
190			libao_driver.wave_out_close = libao_close;
191	stargo	1276	libao_driver.wave_out_format_supported = rdpsnd_dsp_resample_supported;
192	stargo	1256	libao_driver.wave_out_set_format = libao_set_format;
193	stargo	1258	libao_driver.wave_out_volume = rdpsnd_dsp_softvol_set;
194	stargo	1256	libao_driver.wave_out_play = libao_play;
195			libao_driver.name = xstrdup("libao");
196	stargo	1266	libao_driver.description = description;
197	stargo	1260	libao_driver.need_byteswap_on_be = 0;
198	stargo	1256	libao_driver.next = NULL;
199
200	stargo	1266	ao_initialize();
201	stargo	1268
202			libao_info = ao_driver_info(ao_default_driver_id());
203
204			if (libao_info)
205			{
206			snprintf(description, 100, "libao output driver, default device: %s",
207	stargo	1276	libao_info->short_name);
208	stargo	1268	}
209			else
210			{
211			snprintf(description, 100, "libao output driver, default device: none");
212			}
213
214	stargo	1266	ao_shutdown();
215
216	stargo	1255	if (options)
217			{
218			libao_device = xstrdup(options);
219			}
220
221			return &libao_driver;
222			}