rdesktop/trunk/rdpsnd.c

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Sound Channel Process Functions
   Copyright (C) Matthew Chapman 2003
   Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003

   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 <assert.h>

#include "rdesktop.h"
#include "rdpsnd.h"
#include "rdpsnd_dsp.h"

#define RDPSND_CLOSE            1
#define RDPSND_WRITE            2
#define RDPSND_SET_VOLUME       3
#define RDPSND_UNKNOWN4         4
#define RDPSND_COMPLETION       5
#define RDPSND_PING                     6
#define RDPSND_NEGOTIATE        7

#define MAX_FORMATS             10
#define MAX_QUEUE               10

BOOL g_dsp_busy = False;
int g_dsp_fd;

static VCHANNEL *rdpsnd_channel;
static struct audio_driver *drivers = NULL;
struct audio_driver *current_driver = NULL;

static BOOL device_open;
static WAVEFORMATEX formats[MAX_FORMATS];
static unsigned int format_count;
static unsigned int current_format;
unsigned int queue_hi, queue_lo, queue_pending;
struct audio_packet packet_queue[MAX_QUEUE];

void (*wave_out_play) (void);

static void rdpsnd_queue_write(STREAM s, uint16 tick, uint8 index);
static void rdpsnd_queue_init(void);
static void rdpsnd_queue_complete_pending(void);
static long rdpsnd_queue_next_completion(void);

static STREAM
rdpsnd_init_packet(uint16 type, uint16 size)
{
        STREAM s;

        s = channel_init(rdpsnd_channel, size + 4);
        out_uint16_le(s, type);
        out_uint16_le(s, size);
        return s;
}

static void
rdpsnd_send(STREAM s)
{
#ifdef RDPSND_DEBUG
        printf("RDPSND send:\n");
        hexdump(s->channel_hdr + 8, s->end - s->channel_hdr - 8);
#endif

        channel_send(s, rdpsnd_channel);
}

static void
rdpsnd_send_completion(uint16 tick, uint8 packet_index)
{
        STREAM s;

        s = rdpsnd_init_packet(RDPSND_COMPLETION, 4);
        out_uint16_le(s, tick);
        out_uint8(s, packet_index);
        out_uint8(s, 0);
        s_mark_end(s);
        rdpsnd_send(s);
}

static void
rdpsnd_process_negotiate(STREAM in)
{
        unsigned int in_format_count, i;
        WAVEFORMATEX *format;
        STREAM out;
        BOOL device_available = False;
        int readcnt;
        int discardcnt;

        in_uint8s(in, 14);      /* flags, volume, pitch, UDP port */
        in_uint16_le(in, in_format_count);
        in_uint8s(in, 4);       /* pad, status, pad */

        if (current_driver->wave_out_open())
        {
                current_driver->wave_out_close();
                device_available = True;
        }

        format_count = 0;
        if (s_check_rem(in, 18 * in_format_count))
        {
                for (i = 0; i < in_format_count; i++)
                {
                        format = &formats[format_count];
                        in_uint16_le(in, format->wFormatTag);
                        in_uint16_le(in, format->nChannels);
                        in_uint32_le(in, format->nSamplesPerSec);
                        in_uint32_le(in, format->nAvgBytesPerSec);
                        in_uint16_le(in, format->nBlockAlign);
                        in_uint16_le(in, format->wBitsPerSample);
                        in_uint16_le(in, format->cbSize);

                        /* read in the buffer of unknown use */
                        readcnt = format->cbSize;
                        discardcnt = 0;
                        if (format->cbSize > MAX_CBSIZE)
                        {
                                fprintf(stderr, "cbSize too large for buffer: %d\n",
                                        format->cbSize);
                                readcnt = MAX_CBSIZE;
                                discardcnt = format->cbSize - MAX_CBSIZE;
                        }
                        in_uint8a(in, format->cb, readcnt);
                        in_uint8s(in, discardcnt);

                        if (device_available && current_driver->wave_out_format_supported(format))
                        {
                                format_count++;
                                if (format_count == MAX_FORMATS)
                                        break;
                        }
                }
        }

        out = rdpsnd_init_packet(RDPSND_NEGOTIATE | 0x200, 20 + 18 * format_count);
        out_uint32_le(out, 3);  /* flags */
        out_uint32(out, 0xffffffff);    /* volume */
        out_uint32(out, 0);     /* pitch */
        out_uint16(out, 0);     /* UDP port */

        out_uint16_le(out, format_count);
        out_uint8(out, 0x95);   /* pad? */
        out_uint16_le(out, 2);  /* status */
        out_uint8(out, 0x77);   /* pad? */

        for (i = 0; i < format_count; i++)
        {
                format = &formats[i];
                out_uint16_le(out, format->wFormatTag);
                out_uint16_le(out, format->nChannels);
                out_uint32_le(out, format->nSamplesPerSec);
                out_uint32_le(out, format->nAvgBytesPerSec);
                out_uint16_le(out, format->nBlockAlign);
                out_uint16_le(out, format->wBitsPerSample);
                out_uint16(out, 0);     /* cbSize */
        }

        s_mark_end(out);
        rdpsnd_send(out);
}

static void
rdpsnd_process_ping(STREAM in)
{
        uint16 tick;
        STREAM out;

        in_uint16_le(in, tick);

        out = rdpsnd_init_packet(RDPSND_PING | 0x2300, 4);
        out_uint16_le(out, tick);
        out_uint16_le(out, 0);
        s_mark_end(out);
        rdpsnd_send(out);
}

static void
rdpsnd_process(STREAM s)
{
        uint8 type;
        uint16 datalen;
        uint32 volume;
        static uint16 tick, format;
        static uint8 packet_index;
        static BOOL awaiting_data_packet;
        static unsigned char missing_bytes[4] = { 0, 0, 0, 0 };

#ifdef RDPSND_DEBUG
        printf("RDPSND recv:\n");
        hexdump(s->p, s->end - s->p);
#endif

        if (awaiting_data_packet)
        {
                if (format >= MAX_FORMATS)
                {
                        error("RDPSND: Invalid format index\n");
                        return;
                }

                if (!device_open || (format != current_format))
                {
                        if (!device_open && !current_driver->wave_out_open())
                        {
                                rdpsnd_send_completion(tick, packet_index);
                                return;
                        }
                        if (!current_driver->wave_out_set_format(&formats[format]))
                        {
                                rdpsnd_send_completion(tick, packet_index);
                                current_driver->wave_out_close();
                                device_open = False;
                                return;
                        }
                        device_open = True;
                        current_format = format;
                }

                /* Insert the 4 missing bytes retrieved from last RDPSND_WRITE */
                memcpy(s->data, missing_bytes, 4);

                rdpsnd_queue_write(rdpsnd_dsp_process
                                   (s, current_driver, &formats[current_format]), tick,
                                   packet_index);
                awaiting_data_packet = False;
                return;
        }

        in_uint8(s, type);
        in_uint8s(s, 1);        /* unknown? */
        in_uint16_le(s, datalen);

        switch (type)
        {
                case RDPSND_WRITE:
                        in_uint16_le(s, tick);
                        in_uint16_le(s, format);
                        in_uint8(s, packet_index);
                        /* Here are our lost bytes, but why? */
                        memcpy(missing_bytes, s->end - 4, 4);
                        awaiting_data_packet = True;
                        break;
                case RDPSND_CLOSE:
                        current_driver->wave_out_close();
                        device_open = False;
                        break;
                case RDPSND_NEGOTIATE:
                        rdpsnd_process_negotiate(s);
                        break;
                case RDPSND_PING:
                        rdpsnd_process_ping(s);
                        break;
                case RDPSND_SET_VOLUME:
                        in_uint32(s, volume);
                        if (device_open)
                        {
                                current_driver->wave_out_volume((volume & 0xffff),
                                                                (volume & 0xffff0000) >> 16);
                        }
                        break;
                default:
                        unimpl("RDPSND packet type %d\n", type);
                        break;
        }
}

static BOOL
rdpsnd_auto_open(void)
{
        static BOOL failed = False;

        if (!failed)
        {
                struct audio_driver *auto_driver = current_driver;

                current_driver = drivers;
                while (current_driver != NULL)
                {
                        DEBUG(("trying %s...\n", current_driver->name));
                        if (current_driver->wave_out_open())
                        {
                                DEBUG(("selected %s\n", current_driver->name));
                                return True;
                        }
                        g_dsp_fd = 0;
                        current_driver = current_driver->next;
                }

                warning("no working audio-driver found\n");
                failed = True;
                current_driver = auto_driver;
        }

        return False;
}

static void
rdpsnd_register_drivers(char *options)
{
        struct audio_driver **reg;

        /* The order of registrations define the probe-order
           when opening the device for the first time */
        reg = &drivers;
#if defined(RDPSND_ALSA)
        *reg = alsa_register(options);
        assert(*reg);
        reg = &((*reg)->next);
#endif
#if defined(RDPSND_SUN)
        *reg = sun_register(options);
        assert(*reg);
        reg = &((*reg)->next);
#endif
#if defined(RDPSND_OSS)
        *reg = oss_register(options);
        assert(*reg);
        reg = &((*reg)->next);
#endif
#if defined(RDPSND_SGI)
        *reg = sgi_register(options);
        assert(*reg);
        reg = &((*reg)->next);
#endif
#if defined(RDPSND_LIBAO)
        *reg = libao_register(options);
        assert(*reg);
        reg = &((*reg)->next);
#endif
        *reg = NULL;
}

BOOL
rdpsnd_init(char *optarg)
{
        static struct audio_driver auto_driver;
        struct audio_driver *pos;
        char *driver = NULL, *options = NULL;

        drivers = NULL;

        rdpsnd_channel =
                channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP,
                                 rdpsnd_process);

        if (rdpsnd_channel == NULL)
        {
                error("channel_register\n");
                return False;
        }

        rdpsnd_queue_init();

        if (optarg != NULL && strlen(optarg) > 0)
        {
                driver = options = optarg;

                while (*options != '\0' && *options != ':')
                        options++;

                if (*options == ':')
                {
                        *options = '\0';
                        options++;
                }

                if (*options == '\0')
                        options = NULL;
        }

        rdpsnd_register_drivers(options);

        if (!driver)
        {
                auto_driver.wave_out_open = &rdpsnd_auto_open;
                current_driver = &auto_driver;
                return True;
        }

        pos = drivers;
        while (pos != NULL)
        {
                if (!strcmp(pos->name, driver))
                {
                        DEBUG(("selected %s\n", pos->name));
                        current_driver = pos;
                        return True;
                }
                pos = pos->next;
        }
        return False;
}

void
rdpsnd_show_help(void)
{
        struct audio_driver *pos;

        rdpsnd_register_drivers(NULL);

        pos = drivers;
        while (pos != NULL)
        {
                fprintf(stderr, "                     %s:\t%s\n", pos->name, pos->description);
                pos = pos->next;
        }
}

void
rdpsnd_play(void)
{
        current_driver->wave_out_play();
}

void
rdpsnd_add_fds(int *n, fd_set * rfds, fd_set * wfds, struct timeval *tv)
{
        long next_pending;

        if (g_dsp_busy)
        {
                FD_SET(g_dsp_fd, wfds);
                *n = (g_dsp_fd > *n) ? g_dsp_fd : *n;
        }

        next_pending = rdpsnd_queue_next_completion();
        if (next_pending >= 0)
        {
                long cur_timeout;

                cur_timeout = tv->tv_sec * 1000000 + tv->tv_usec;
                if (cur_timeout > next_pending)
                {
                        tv->tv_sec = next_pending / 1000000;
                        tv->tv_usec = next_pending % 1000000;
                }
        }
}

void
rdpsnd_check_fds(fd_set * rfds, fd_set * wfds)
{
        rdpsnd_queue_complete_pending();

        if (g_dsp_busy && FD_ISSET(g_dsp_fd, wfds))
                rdpsnd_play();
}

static void
rdpsnd_queue_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_pending)
        {
                error("No space to queue audio packet\n");
                return;
        }

        queue_hi = next_hi;

        packet->s = *s;
        packet->tick = tick;
        packet->index = index;

        gettimeofday(&packet->arrive_tv, NULL);

        if (!g_dsp_busy)
                current_driver->wave_out_play();
}

struct audio_packet *
rdpsnd_queue_current_packet(void)
{
        return &packet_queue[queue_lo];
}

BOOL
rdpsnd_queue_empty(void)
{
        return (queue_lo == queue_hi);
}

static void
rdpsnd_queue_init(void)
{
        queue_pending = queue_lo = queue_hi = 0;
}

void
rdpsnd_queue_next(unsigned long completed_in_us)
{
        struct audio_packet *packet;

        assert(!rdpsnd_queue_empty());

        packet = &packet_queue[queue_lo];

        gettimeofday(&packet->completion_tv, NULL);

        packet->completion_tv.tv_usec += completed_in_us;
        packet->completion_tv.tv_sec += packet->completion_tv.tv_usec / 1000000;
        packet->completion_tv.tv_usec %= 1000000;

        queue_lo = (queue_lo + 1) % MAX_QUEUE;

        rdpsnd_queue_complete_pending();
}

int
rdpsnd_queue_next_tick(void)
{
        if (((queue_lo + 1) % MAX_QUEUE) != queue_hi)
        {
                return packet_queue[(queue_lo + 1) % MAX_QUEUE].tick;
        }
        else
        {
                return (packet_queue[queue_lo].tick + 65535) % 65536;
        }
}

static void
rdpsnd_queue_complete_pending(void)
{
        struct timeval now;
        long elapsed;
        struct audio_packet *packet;

        gettimeofday(&now, NULL);

        while (queue_pending != queue_lo)
        {
                packet = &packet_queue[queue_pending];

                if (now.tv_sec < packet->completion_tv.tv_sec)
                        break;

                if ((now.tv_sec == packet->completion_tv.tv_sec) &&
                    (now.tv_usec < packet->completion_tv.tv_usec))
                        break;

                elapsed = (packet->completion_tv.tv_sec - packet->arrive_tv.tv_sec) * 1000000 +
                        (packet->completion_tv.tv_usec - packet->arrive_tv.tv_usec);
                elapsed /= 1000;

                xfree(packet->s.data);
                rdpsnd_send_completion((packet->tick + elapsed) % 65536, packet->index);
                queue_pending = (queue_pending + 1) % MAX_QUEUE;
        }
}

static long
rdpsnd_queue_next_completion(void)
{
        struct audio_packet *packet;
        long remaining;
        struct timeval now;

        if (queue_pending == queue_lo)
                return -1;

        gettimeofday(&now, NULL);

        packet = &packet_queue[queue_pending];

        remaining = (packet->completion_tv.tv_sec - now.tv_sec) * 1000000 +
                (packet->completion_tv.tv_usec - now.tv_usec);

        if (remaining < 0)
                return 0;

        return remaining;
}
1	astrand	963	/* -- c-basic-offset: 8 --
2	matthewc	474	rdesktop: A Remote Desktop Protocol client.
3			Sound Channel Process Functions
4			Copyright (C) Matthew Chapman 2003
5			Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
6
7			This program is free software; you can redistribute it and/or modify
8			it under the terms of the GNU General Public License as published by
9			the Free Software Foundation; either version 2 of the License, or
10			(at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17			You should have received a copy of the GNU General Public License
18			along with this program; if not, write to the Free Software
19			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20			*/
21
22	ossman_	1298	#include <assert.h>
23
24	matthewc	432	#include "rdesktop.h"
25	stargo	1254	#include "rdpsnd.h"
26	stargo	1258	#include "rdpsnd_dsp.h"
27	matthewc	432
28	matthewc	474	#define RDPSND_CLOSE 1
29			#define RDPSND_WRITE 2
30			#define RDPSND_SET_VOLUME 3
31			#define RDPSND_UNKNOWN4 4
32			#define RDPSND_COMPLETION 5
33	ossman_	1339	#define RDPSND_PING 6
34	matthewc	474	#define RDPSND_NEGOTIATE 7
35
36			#define MAX_FORMATS 10
37	stargo	1254	#define MAX_QUEUE 10
38	matthewc	474
39	stargo	1254	BOOL g_dsp_busy = False;
40			int g_dsp_fd;
41
42	matthewc	432	static VCHANNEL *rdpsnd_channel;
43	stargo	1255	static struct audio_driver *drivers = NULL;
44	stargo	1256	struct audio_driver *current_driver = NULL;
45	matthewc	432
46	matthewc	474	static BOOL device_open;
47			static WAVEFORMATEX formats[MAX_FORMATS];
48			static unsigned int format_count;
49			static unsigned int current_format;
50	ossman_	1302	unsigned int queue_hi, queue_lo, queue_pending;
51	stargo	1256	struct audio_packet packet_queue[MAX_QUEUE];
52	matthewc	474
53	stargo	1255	void (*wave_out_play) (void);
54
55	ossman_	1302	static void rdpsnd_queue_write(STREAM s, uint16 tick, uint8 index);
56			static void rdpsnd_queue_init(void);
57			static void rdpsnd_queue_complete_pending(void);
58			static long rdpsnd_queue_next_completion(void);
59
60	astrand	665	static STREAM
61	matthewc	474	rdpsnd_init_packet(uint16 type, uint16 size)
62			{
63			STREAM s;
64
65	astrand	499	s = channel_init(rdpsnd_channel, size + 4);
66	matthewc	474	out_uint16_le(s, type);
67			out_uint16_le(s, size);
68			return s;
69			}
70
71	astrand	665	static void
72	matthewc	474	rdpsnd_send(STREAM s)
73			{
74			#ifdef RDPSND_DEBUG
75			printf("RDPSND send:\n");
76	astrand	499	hexdump(s->channel_hdr + 8, s->end - s->channel_hdr - 8);
77	matthewc	474	#endif
78
79			channel_send(s, rdpsnd_channel);
80			}
81
82	ossman_	1302	static void
83	astrand	499	rdpsnd_send_completion(uint16 tick, uint8 packet_index)
84	matthewc	474	{
85			STREAM s;
86
87			s = rdpsnd_init_packet(RDPSND_COMPLETION, 4);
88	stargo	1254	out_uint16_le(s, tick);
89	matthewc	474	out_uint8(s, packet_index);
90			out_uint8(s, 0);
91			s_mark_end(s);
92			rdpsnd_send(s);
93			}
94
95	astrand	665	static void
96	matthewc	474	rdpsnd_process_negotiate(STREAM in)
97			{
98			unsigned int in_format_count, i;
99			WAVEFORMATEX *format;
100			STREAM out;
101	stargo	491	BOOL device_available = False;
102	stargo	493	int readcnt;
103			int discardcnt;
104	matthewc	474
105			in_uint8s(in, 14); /* flags, volume, pitch, UDP port */
106			in_uint16_le(in, in_format_count);
107			in_uint8s(in, 4); /* pad, status, pad */
108
109	stargo	1255	if (current_driver->wave_out_open())
110	stargo	491	{
111	stargo	1255	current_driver->wave_out_close();
112	stargo	491	device_available = True;
113			}
114
115	matthewc	474	format_count = 0;
116	astrand	499	if (s_check_rem(in, 18 * in_format_count))
117	matthewc	474	{
118			for (i = 0; i < in_format_count; i++)
119			{
120			format = &formats[format_count];
121			in_uint16_le(in, format->wFormatTag);
122			in_uint16_le(in, format->nChannels);
123			in_uint32_le(in, format->nSamplesPerSec);
124			in_uint32_le(in, format->nAvgBytesPerSec);
125			in_uint16_le(in, format->nBlockAlign);
126			in_uint16_le(in, format->wBitsPerSample);
127			in_uint16_le(in, format->cbSize);
128
129	stargo	492	/* read in the buffer of unknown use */
130	stargo	493	readcnt = format->cbSize;
131			discardcnt = 0;
132	stargo	492	if (format->cbSize > MAX_CBSIZE)
133			{
134	astrand	499	fprintf(stderr, "cbSize too large for buffer: %d\n",
135			format->cbSize);
136	stargo	492	readcnt = MAX_CBSIZE;
137			discardcnt = format->cbSize - MAX_CBSIZE;
138			}
139			in_uint8a(in, format->cb, readcnt);
140			in_uint8s(in, discardcnt);
141
142	stargo	1255	if (device_available && current_driver->wave_out_format_supported(format))
143	matthewc	474	{
144			format_count++;
145			if (format_count == MAX_FORMATS)
146			break;
147			}
148			}
149			}
150
151	astrand	499	out = rdpsnd_init_packet(RDPSND_NEGOTIATE \| 0x200, 20 + 18 * format_count);
152			out_uint32_le(out, 3); /* flags */
153	matthewc	474	out_uint32(out, 0xffffffff); /* volume */
154	astrand	499	out_uint32(out, 0); /* pitch */
155			out_uint16(out, 0); /* UDP port */
156	matthewc	474
157			out_uint16_le(out, format_count);
158	astrand	499	out_uint8(out, 0x95); /* pad? */
159			out_uint16_le(out, 2); /* status */
160			out_uint8(out, 0x77); /* pad? */
161	matthewc	474
162			for (i = 0; i < format_count; i++)
163			{
164			format = &formats[i];
165			out_uint16_le(out, format->wFormatTag);
166			out_uint16_le(out, format->nChannels);
167			out_uint32_le(out, format->nSamplesPerSec);
168			out_uint32_le(out, format->nAvgBytesPerSec);
169			out_uint16_le(out, format->nBlockAlign);
170			out_uint16_le(out, format->wBitsPerSample);
171	astrand	499	out_uint16(out, 0); /* cbSize */
172	matthewc	474	}
173
174			s_mark_end(out);
175			rdpsnd_send(out);
176			}
177
178	astrand	665	static void
179	ossman_	1339	rdpsnd_process_ping(STREAM in)
180	matthewc	474	{
181	ossman_	1339	uint16 tick;
182	matthewc	474	STREAM out;
183
184	ossman_	1339	in_uint16_le(in, tick);
185	matthewc	474
186	ossman_	1339	out = rdpsnd_init_packet(RDPSND_PING \| 0x2300, 4);
187			out_uint16_le(out, tick);
188			out_uint16_le(out, 0);
189	matthewc	474	s_mark_end(out);
190			rdpsnd_send(out);
191			}
192
193	astrand	665	static void
194	matthewc	432	rdpsnd_process(STREAM s)
195			{
196	matthewc	474	uint8 type;
197			uint16 datalen;
198	stargo	491	uint32 volume;
199	matthewc	474	static uint16 tick, format;
200			static uint8 packet_index;
201			static BOOL awaiting_data_packet;
202	stargo	1265	static unsigned char missing_bytes[4] = { 0, 0, 0, 0 };
203	matthewc	474
204			#ifdef RDPSND_DEBUG
205			printf("RDPSND recv:\n");
206	astrand	499	hexdump(s->p, s->end - s->p);
207	matthewc	474	#endif
208
209			if (awaiting_data_packet)
210			{
211			if (format >= MAX_FORMATS)
212			{
213			error("RDPSND: Invalid format index\n");
214			return;
215			}
216
217			if (!device_open \|\| (format != current_format))
218			{
219	stargo	1255	if (!device_open && !current_driver->wave_out_open())
220	matthewc	474	{
221			rdpsnd_send_completion(tick, packet_index);
222			return;
223			}
224	stargo	1255	if (!current_driver->wave_out_set_format(&formats[format]))
225	matthewc	474	{
226			rdpsnd_send_completion(tick, packet_index);
227	stargo	1255	current_driver->wave_out_close();
228	matthewc	474	device_open = False;
229			return;
230			}
231			device_open = True;
232			current_format = format;
233			}
234
235	stargo	1265	/* Insert the 4 missing bytes retrieved from last RDPSND_WRITE */
236			memcpy(s->data, missing_bytes, 4);
237
238	ossman_	1302	rdpsnd_queue_write(rdpsnd_dsp_process
239			(s, current_driver, &formats[current_format]), tick,
240			packet_index);
241	matthewc	474	awaiting_data_packet = False;
242			return;
243			}
244
245			in_uint8(s, type);
246	astrand	499	in_uint8s(s, 1); /* unknown? */
247	matthewc	474	in_uint16_le(s, datalen);
248
249			switch (type)
250			{
251	astrand	499	case RDPSND_WRITE:
252			in_uint16_le(s, tick);
253			in_uint16_le(s, format);
254			in_uint8(s, packet_index);
255	stargo	1265	/* Here are our lost bytes, but why? */
256			memcpy(missing_bytes, s->end - 4, 4);
257	astrand	499	awaiting_data_packet = True;
258			break;
259			case RDPSND_CLOSE:
260	stargo	1255	current_driver->wave_out_close();
261	astrand	499	device_open = False;
262			break;
263			case RDPSND_NEGOTIATE:
264			rdpsnd_process_negotiate(s);
265			break;
266	ossman_	1339	case RDPSND_PING:
267			rdpsnd_process_ping(s);
268	astrand	499	break;
269			case RDPSND_SET_VOLUME:
270			in_uint32(s, volume);
271			if (device_open)
272			{
273	stargo	1255	current_driver->wave_out_volume((volume & 0xffff),
274			(volume & 0xffff0000) >> 16);
275	astrand	499	}
276			break;
277			default:
278			unimpl("RDPSND packet type %d\n", type);
279			break;
280	matthewc	474	}
281	matthewc	432	}
282
283	stargo	1274	static BOOL
284	stargo	1255	rdpsnd_auto_open(void)
285			{
286	stargo	1271	static BOOL failed = False;
287
288			if (!failed)
289	stargo	1255	{
290	stargo	1271	struct audio_driver *auto_driver = current_driver;
291
292			current_driver = drivers;
293			while (current_driver != NULL)
294	stargo	1255	{
295	stargo	1271	DEBUG(("trying %s...\n", current_driver->name));
296			if (current_driver->wave_out_open())
297			{
298			DEBUG(("selected %s\n", current_driver->name));
299			return True;
300			}
301			g_dsp_fd = 0;
302			current_driver = current_driver->next;
303	stargo	1255	}
304	stargo	1271
305			warning("no working audio-driver found\n");
306			failed = True;
307			current_driver = auto_driver;
308	stargo	1255	}
309
310			return False;
311			}
312
313	stargo	1274	static void
314	stargo	1255	rdpsnd_register_drivers(char *options)
315			{
316			struct audio_driver **reg;
317
318			/* The order of registrations define the probe-order
319			when opening the device for the first time */
320			reg = &drivers;
321			#if defined(RDPSND_ALSA)
322			*reg = alsa_register(options);
323	ossman_	1298	assert(*reg);
324	stargo	1255	reg = &((*reg)->next);
325			#endif
326	stargo	1264	#if defined(RDPSND_SUN)
327			*reg = sun_register(options);
328	ossman_	1298	assert(*reg);
329	stargo	1264	reg = &((*reg)->next);
330			#endif
331	stargo	1255	#if defined(RDPSND_OSS)
332			*reg = oss_register(options);
333	ossman_	1298	assert(*reg);
334	stargo	1255	reg = &((*reg)->next);
335			#endif
336			#if defined(RDPSND_SGI)
337			*reg = sgi_register(options);
338	ossman_	1298	assert(*reg);
339	stargo	1255	reg = &((*reg)->next);
340			#endif
341			#if defined(RDPSND_LIBAO)
342			*reg = libao_register(options);
343	ossman_	1302	assert(*reg);
344	stargo	1255	reg = &((*reg)->next);
345			#endif
346	stargo	1332	*reg = NULL;
347	stargo	1255	}
348
349			BOOL
350	stargo	1272	rdpsnd_init(char *optarg)
351	stargo	1255	{
352			static struct audio_driver auto_driver;
353			struct audio_driver *pos;
354	stargo	1272	char driver = NULL, options = NULL;
355	stargo	1255
356			drivers = NULL;
357	stargo	1272
358			rdpsnd_channel =
359			channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED \| CHANNEL_OPTION_ENCRYPT_RDP,
360			rdpsnd_process);
361
362			if (rdpsnd_channel == NULL)
363			{
364			error("channel_register\n");
365			return False;
366			}
367
368	ossman_	1302	rdpsnd_queue_init();
369
370	stargo	1272	if (optarg != NULL && strlen(optarg) > 0)
371			{
372			driver = options = optarg;
373
374			while (options != '\0' && options != ':')
375			options++;
376
377			if (*options == ':')
378			{
379			*options = '\0';
380			options++;
381			}
382
383			if (*options == '\0')
384			options = NULL;
385			}
386
387	stargo	1255	rdpsnd_register_drivers(options);
388
389			if (!driver)
390			{
391			auto_driver.wave_out_open = &rdpsnd_auto_open;
392			current_driver = &auto_driver;
393			return True;
394			}
395
396			pos = drivers;
397			while (pos != NULL)
398			{
399			if (!strcmp(pos->name, driver))
400			{
401			DEBUG(("selected %s\n", pos->name));
402			current_driver = pos;
403			return True;
404			}
405			pos = pos->next;
406			}
407			return False;
408			}
409
410			void
411			rdpsnd_show_help(void)
412			{
413			struct audio_driver *pos;
414
415			rdpsnd_register_drivers(NULL);
416
417			pos = drivers;
418			while (pos != NULL)
419			{
420			fprintf(stderr, " %s:\t%s\n", pos->name, pos->description);
421			pos = pos->next;
422			}
423			}
424
425	stargo	1273	void
426	stargo	1255	rdpsnd_play(void)
427			{
428			current_driver->wave_out_play();
429			}
430
431	ossman_	1299	void
432	ossman_	1302	rdpsnd_add_fds(int n, fd_set rfds, fd_set * wfds, struct timeval *tv)
433			{
434			long next_pending;
435
436			if (g_dsp_busy)
437			{
438			FD_SET(g_dsp_fd, wfds);
439			n = (g_dsp_fd > n) ? g_dsp_fd : *n;
440			}
441
442			next_pending = rdpsnd_queue_next_completion();
443			if (next_pending >= 0)
444			{
445			long cur_timeout;
446
447			cur_timeout = tv->tv_sec * 1000000 + tv->tv_usec;
448			if (cur_timeout > next_pending)
449			{
450			tv->tv_sec = next_pending / 1000000;
451			tv->tv_usec = next_pending % 1000000;
452			}
453			}
454			}
455
456			void
457			rdpsnd_check_fds(fd_set * rfds, fd_set * wfds)
458			{
459			rdpsnd_queue_complete_pending();
460
461			if (g_dsp_busy && FD_ISSET(g_dsp_fd, wfds))
462			rdpsnd_play();
463			}
464
465			static void
466	stargo	1254	rdpsnd_queue_write(STREAM s, uint16 tick, uint8 index)
467			{
468			struct audio_packet *packet = &packet_queue[queue_hi];
469			unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;
470
471	ossman_	1302	if (next_hi == queue_pending)
472	stargo	1254	{
473			error("No space to queue audio packet\n");
474			return;
475			}
476
477			queue_hi = next_hi;
478
479			packet->s = *s;
480			packet->tick = tick;
481			packet->index = index;
482
483	ossman_	1302	gettimeofday(&packet->arrive_tv, NULL);
484
485	stargo	1254	if (!g_dsp_busy)
486	stargo	1255	current_driver->wave_out_play();
487	stargo	1254	}
488
489	ossman_	1299	struct audio_packet *
490	stargo	1254	rdpsnd_queue_current_packet(void)
491			{
492			return &packet_queue[queue_lo];
493			}
494
495	ossman_	1299	BOOL
496	stargo	1254	rdpsnd_queue_empty(void)
497			{
498			return (queue_lo == queue_hi);
499			}
500
501	ossman_	1302	static void
502	stargo	1254	rdpsnd_queue_init(void)
503			{
504	ossman_	1302	queue_pending = queue_lo = queue_hi = 0;
505	stargo	1254	}
506
507	ossman_	1299	void
508	ossman_	1302	rdpsnd_queue_next(unsigned long completed_in_us)
509	stargo	1254	{
510	ossman_	1302	struct audio_packet *packet;
511
512			assert(!rdpsnd_queue_empty());
513
514			packet = &packet_queue[queue_lo];
515
516			gettimeofday(&packet->completion_tv, NULL);
517
518			packet->completion_tv.tv_usec += completed_in_us;
519			packet->completion_tv.tv_sec += packet->completion_tv.tv_usec / 1000000;
520			packet->completion_tv.tv_usec %= 1000000;
521
522	stargo	1254	queue_lo = (queue_lo + 1) % MAX_QUEUE;
523	ossman_	1302
524			rdpsnd_queue_complete_pending();
525	stargo	1254	}
526
527	ossman_	1299	int
528	stargo	1254	rdpsnd_queue_next_tick(void)
529			{
530			if (((queue_lo + 1) % MAX_QUEUE) != queue_hi)
531			{
532			return packet_queue[(queue_lo + 1) % MAX_QUEUE].tick;
533			}
534			else
535			{
536			return (packet_queue[queue_lo].tick + 65535) % 65536;
537			}
538			}
539	ossman_	1302
540			static void
541			rdpsnd_queue_complete_pending(void)
542			{
543			struct timeval now;
544			long elapsed;
545			struct audio_packet *packet;
546
547			gettimeofday(&now, NULL);
548
549			while (queue_pending != queue_lo)
550			{
551			packet = &packet_queue[queue_pending];
552
553			if (now.tv_sec < packet->completion_tv.tv_sec)
554			break;
555
556			if ((now.tv_sec == packet->completion_tv.tv_sec) &&
557			(now.tv_usec < packet->completion_tv.tv_usec))
558			break;
559
560			elapsed = (packet->completion_tv.tv_sec - packet->arrive_tv.tv_sec) * 1000000 +
561			(packet->completion_tv.tv_usec - packet->arrive_tv.tv_usec);
562	ossman_	1337	elapsed /= 1000;
563	ossman_	1302
564			xfree(packet->s.data);
565			rdpsnd_send_completion((packet->tick + elapsed) % 65536, packet->index);
566			queue_pending = (queue_pending + 1) % MAX_QUEUE;
567			}
568			}
569
570			static long
571			rdpsnd_queue_next_completion(void)
572			{
573			struct audio_packet *packet;
574			long remaining;
575			struct timeval now;
576
577			if (queue_pending == queue_lo)
578			return -1;
579
580			gettimeofday(&now, NULL);
581
582			packet = &packet_queue[queue_pending];
583
584			remaining = (packet->completion_tv.tv_sec - now.tv_sec) * 1000000 +
585			(packet->completion_tv.tv_usec - now.tv_usec);
586
587			if (remaining < 0)
588			return 0;
589
590			return remaining;
591			}