trunk/rdesktop/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 WAVEOUTLEN      1024

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_NATIVE;


        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_NATIVE;

        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 = (WAVEOUTLEN > (out->end - out->p)) ? (out->end - out->p) : WAVEOUTLEN;
        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 = 1;
        libao_driver.need_resampling = 1;
        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	1290	#define WAVEOUTLEN 1024
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	stargo	1289	format.byte_format = AO_FMT_NATIVE;
59	stargo	833
60	stargo	1289
61	stargo	833	o_device = ao_open_live(default_driver, &format, NULL);
62			if (o_device == NULL)
63			{
64			return False;
65			}
66
67			g_dsp_fd = 0;
68	stargo	1254	rdpsnd_queue_init();
69	stargo	833
70	stargo	1245	reopened = True;
71	stargo	891
72	stargo	833	return True;
73			}
74
75			void
76	stargo	1255	libao_close(void)
77	stargo	833	{
78			/* Ack all remaining packets */
79	stargo	1254	while (!rdpsnd_queue_empty())
80	stargo	833	{
81	stargo	1254	rdpsnd_send_completion(rdpsnd_queue_current_packet()->tick,
82			rdpsnd_queue_current_packet()->index);
83			rdpsnd_queue_next();
84	stargo	833	}
85
86			if (o_device != NULL)
87			ao_close(o_device);
88	stargo	838
89	stargo	833	ao_shutdown();
90			}
91
92			BOOL
93	stargo	1255	libao_set_format(WAVEFORMATEX * pwfx)
94	stargo	833	{
95			ao_sample_format format;
96
97			format.bits = pwfx->wBitsPerSample;
98			format.channels = pwfx->nChannels;
99			format.rate = 44100;
100	stargo	1289	format.byte_format = AO_FMT_NATIVE;
101	stargo	833
102	stargo	837	if (o_device != NULL)
103	stargo	833	ao_close(o_device);
104
105			o_device = ao_open_live(default_driver, &format, NULL);
106			if (o_device == NULL)
107			{
108			return False;
109			}
110
111	stargo	1276	if (rdpsnd_dsp_resample_set(44100, pwfx->wBitsPerSample, pwfx->nChannels) == False)
112			{
113			return False;
114			}
115
116	stargo	1245	reopened = True;
117	stargo	833
118			return True;
119			}
120
121			void
122	stargo	1255	libao_play(void)
123	stargo	833	{
124			struct audio_packet *packet;
125			STREAM out;
126	stargo	1276	int len;
127	stargo	891	static long prev_s, prev_us;
128			unsigned int duration;
129			struct timeval tv;
130			int next_tick;
131	stargo	833
132	stargo	1245	if (reopened)
133	stargo	891	{
134	stargo	1245	reopened = False;
135	stargo	891	gettimeofday(&tv, NULL);
136			prev_s = tv.tv_sec;
137			prev_us = tv.tv_usec;
138			}
139
140	stargo	1254	if (rdpsnd_queue_empty())
141	stargo	833	{
142	stargo	835	g_dsp_busy = 0;
143			return;
144			}
145	stargo	833
146	stargo	1254	packet = rdpsnd_queue_current_packet();
147	stargo	835	out = &packet->s;
148	stargo	833
149	stargo	1254	next_tick = rdpsnd_queue_next_tick();
150	stargo	891
151	stargo	1290	len = (WAVEOUTLEN > (out->end - out->p)) ? (out->end - out->p) : WAVEOUTLEN;
152	stargo	1276	ao_play(o_device, (char *) out->p, len);
153			out->p += len;
154	stargo	833
155	stargo	891	gettimeofday(&tv, NULL);
156
157			duration = ((tv.tv_sec - prev_s) * 1000000 + (tv.tv_usec - prev_us)) / 1000;
158
159			if (packet->tick > next_tick)
160			next_tick += 65536;
161
162			if ((out->p == out->end) \|\| duration > next_tick - packet->tick + 500)
163	stargo	835	{
164	stargo	891	prev_s = tv.tv_sec;
165			prev_us = tv.tv_usec;
166
167			if (abs((next_tick - packet->tick) - duration) > 20)
168			{
169			DEBUG(("duration: %d, calc: %d, ", duration, next_tick - packet->tick));
170			DEBUG(("last: %d, is: %d, should: %d\n", packet->tick,
171			(packet->tick + duration) % 65536, next_tick % 65536));
172			}
173
174	stargo	1254	rdpsnd_send_completion(((packet->tick + duration) % 65536), packet->index);
175			rdpsnd_queue_next();
176	stargo	835	}
177
178			g_dsp_busy = 1;
179			return;
180	stargo	833	}
181	stargo	1255
182			struct audio_driver *
183			libao_register(char *options)
184			{
185	stargo	1256	static struct audio_driver libao_driver;
186	stargo	1268	struct ao_info *libao_info;
187	stargo	1266	static char description[101];
188	stargo	1256
189			libao_driver.wave_out_write = rdpsnd_queue_write;
190			libao_driver.wave_out_open = libao_open;
191			libao_driver.wave_out_close = libao_close;
192	stargo	1276	libao_driver.wave_out_format_supported = rdpsnd_dsp_resample_supported;
193	stargo	1256	libao_driver.wave_out_set_format = libao_set_format;
194	stargo	1258	libao_driver.wave_out_volume = rdpsnd_dsp_softvol_set;
195	stargo	1256	libao_driver.wave_out_play = libao_play;
196			libao_driver.name = xstrdup("libao");
197	stargo	1266	libao_driver.description = description;
198	stargo	1289	libao_driver.need_byteswap_on_be = 1;
199	stargo	1279	libao_driver.need_resampling = 1;
200	stargo	1256	libao_driver.next = NULL;
201
202	stargo	1266	ao_initialize();
203	stargo	1268
204			libao_info = ao_driver_info(ao_default_driver_id());
205
206			if (libao_info)
207			{
208			snprintf(description, 100, "libao output driver, default device: %s",
209	stargo	1276	libao_info->short_name);
210	stargo	1268	}
211			else
212			{
213			snprintf(description, 100, "libao output driver, default device: none");
214			}
215
216	stargo	1266	ao_shutdown();
217
218	stargo	1255	if (options)
219			{
220			libao_device = xstrdup(options);
221			}
222
223			return &libao_driver;
224			}