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_SERVERTICK       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_servertick(STREAM in)
{
        uint16 tick1, tick2;
        STREAM out;

        /* in_uint8s(in, 4); unknown */
        in_uint16_le(in, tick1);
        in_uint16_le(in, tick2);

        out = rdpsnd_init_packet(RDPSND_SERVERTICK | 0x2300, 4);
        out_uint16_le(out, tick1);
        out_uint16_le(out, tick2);
        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_SERVERTICK:
                        rdpsnd_process_servertick(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
}

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);

                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	stargo	1044	#define RDPSND_SERVERTICK 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	stargo	1044	rdpsnd_process_servertick(STREAM in)
180	matthewc	474	{
181	stargo	1044	uint16 tick1, tick2;
182	matthewc	474	STREAM out;
183
184			/* in_uint8s(in, 4); unknown */
185	stargo	1044	in_uint16_le(in, tick1);
186			in_uint16_le(in, tick2);
187	matthewc	474
188	stargo	1044	out = rdpsnd_init_packet(RDPSND_SERVERTICK \| 0x2300, 4);
189			out_uint16_le(out, tick1);
190			out_uint16_le(out, tick2);
191	matthewc	474	s_mark_end(out);
192			rdpsnd_send(out);
193			}
194
195	astrand	665	static void
196	matthewc	432	rdpsnd_process(STREAM s)
197			{
198	matthewc	474	uint8 type;
199			uint16 datalen;
200	stargo	491	uint32 volume;
201	matthewc	474	static uint16 tick, format;
202			static uint8 packet_index;
203			static BOOL awaiting_data_packet;
204	stargo	1265	static unsigned char missing_bytes[4] = { 0, 0, 0, 0 };
205	matthewc	474
206			#ifdef RDPSND_DEBUG
207			printf("RDPSND recv:\n");
208	astrand	499	hexdump(s->p, s->end - s->p);
209	matthewc	474	#endif
210
211			if (awaiting_data_packet)
212			{
213			if (format >= MAX_FORMATS)
214			{
215			error("RDPSND: Invalid format index\n");
216			return;
217			}
218
219			if (!device_open \|\| (format != current_format))
220			{
221	stargo	1255	if (!device_open && !current_driver->wave_out_open())
222	matthewc	474	{
223			rdpsnd_send_completion(tick, packet_index);
224			return;
225			}
226	stargo	1255	if (!current_driver->wave_out_set_format(&formats[format]))
227	matthewc	474	{
228			rdpsnd_send_completion(tick, packet_index);
229	stargo	1255	current_driver->wave_out_close();
230	matthewc	474	device_open = False;
231			return;
232			}
233			device_open = True;
234			current_format = format;
235			}
236
237	stargo	1265	/* Insert the 4 missing bytes retrieved from last RDPSND_WRITE */
238			memcpy(s->data, missing_bytes, 4);
239
240	ossman_	1302	rdpsnd_queue_write(rdpsnd_dsp_process
241			(s, current_driver, &formats[current_format]), tick,
242			packet_index);
243	matthewc	474	awaiting_data_packet = False;
244			return;
245			}
246
247			in_uint8(s, type);
248	astrand	499	in_uint8s(s, 1); /* unknown? */
249	matthewc	474	in_uint16_le(s, datalen);
250
251			switch (type)
252			{
253	astrand	499	case RDPSND_WRITE:
254			in_uint16_le(s, tick);
255			in_uint16_le(s, format);
256			in_uint8(s, packet_index);
257	stargo	1265	/* Here are our lost bytes, but why? */
258			memcpy(missing_bytes, s->end - 4, 4);
259	astrand	499	awaiting_data_packet = True;
260			break;
261			case RDPSND_CLOSE:
262	stargo	1255	current_driver->wave_out_close();
263	astrand	499	device_open = False;
264			break;
265			case RDPSND_NEGOTIATE:
266			rdpsnd_process_negotiate(s);
267			break;
268	stargo	1044	case RDPSND_SERVERTICK:
269			rdpsnd_process_servertick(s);
270	astrand	499	break;
271			case RDPSND_SET_VOLUME:
272			in_uint32(s, volume);
273			if (device_open)
274			{
275	stargo	1255	current_driver->wave_out_volume((volume & 0xffff),
276			(volume & 0xffff0000) >> 16);
277	astrand	499	}
278			break;
279			default:
280			unimpl("RDPSND packet type %d\n", type);
281			break;
282	matthewc	474	}
283	matthewc	432	}
284
285	stargo	1274	static BOOL
286	stargo	1255	rdpsnd_auto_open(void)
287			{
288	stargo	1271	static BOOL failed = False;
289
290			if (!failed)
291	stargo	1255	{
292	stargo	1271	struct audio_driver *auto_driver = current_driver;
293
294			current_driver = drivers;
295			while (current_driver != NULL)
296	stargo	1255	{
297	stargo	1271	DEBUG(("trying %s...\n", current_driver->name));
298			if (current_driver->wave_out_open())
299			{
300			DEBUG(("selected %s\n", current_driver->name));
301			return True;
302			}
303			g_dsp_fd = 0;
304			current_driver = current_driver->next;
305	stargo	1255	}
306	stargo	1271
307			warning("no working audio-driver found\n");
308			failed = True;
309			current_driver = auto_driver;
310	stargo	1255	}
311
312			return False;
313			}
314
315	stargo	1274	static void
316	stargo	1255	rdpsnd_register_drivers(char *options)
317			{
318			struct audio_driver **reg;
319
320			/* The order of registrations define the probe-order
321			when opening the device for the first time */
322			reg = &drivers;
323			#if defined(RDPSND_ALSA)
324			*reg = alsa_register(options);
325	ossman_	1298	assert(*reg);
326	stargo	1255	reg = &((*reg)->next);
327			#endif
328	stargo	1264	#if defined(RDPSND_SUN)
329			*reg = sun_register(options);
330	ossman_	1298	assert(*reg);
331	stargo	1264	reg = &((*reg)->next);
332			#endif
333	stargo	1255	#if defined(RDPSND_OSS)
334			*reg = oss_register(options);
335	ossman_	1298	assert(*reg);
336	stargo	1255	reg = &((*reg)->next);
337			#endif
338			#if defined(RDPSND_SGI)
339			*reg = sgi_register(options);
340	ossman_	1298	assert(*reg);
341	stargo	1255	reg = &((*reg)->next);
342			#endif
343			#if defined(RDPSND_LIBAO)
344			*reg = libao_register(options);
345	ossman_	1302	assert(*reg);
346	stargo	1255	reg = &((*reg)->next);
347			#endif
348			}
349
350			BOOL
351	stargo	1272	rdpsnd_init(char *optarg)
352	stargo	1255	{
353			static struct audio_driver auto_driver;
354			struct audio_driver *pos;
355	stargo	1272	char driver = NULL, options = NULL;
356	stargo	1255
357			drivers = NULL;
358	stargo	1272
359			rdpsnd_channel =
360			channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED \| CHANNEL_OPTION_ENCRYPT_RDP,
361			rdpsnd_process);
362
363			if (rdpsnd_channel == NULL)
364			{
365			error("channel_register\n");
366			return False;
367			}
368
369	ossman_	1302	rdpsnd_queue_init();
370
371	stargo	1272	if (optarg != NULL && strlen(optarg) > 0)
372			{
373			driver = options = optarg;
374
375			while (options != '\0' && options != ':')
376			options++;
377
378			if (*options == ':')
379			{
380			*options = '\0';
381			options++;
382			}
383
384			if (*options == '\0')
385			options = NULL;
386			}
387
388	stargo	1255	rdpsnd_register_drivers(options);
389
390			if (!driver)
391			{
392			auto_driver.wave_out_open = &rdpsnd_auto_open;
393			current_driver = &auto_driver;
394			return True;
395			}
396
397			pos = drivers;
398			while (pos != NULL)
399			{
400			if (!strcmp(pos->name, driver))
401			{
402			DEBUG(("selected %s\n", pos->name));
403			current_driver = pos;
404			return True;
405			}
406			pos = pos->next;
407			}
408			return False;
409			}
410
411			void
412			rdpsnd_show_help(void)
413			{
414			struct audio_driver *pos;
415
416			rdpsnd_register_drivers(NULL);
417
418			pos = drivers;
419			while (pos != NULL)
420			{
421			fprintf(stderr, " %s:\t%s\n", pos->name, pos->description);
422			pos = pos->next;
423			}
424			}
425
426	stargo	1273	void
427	stargo	1255	rdpsnd_play(void)
428			{
429			current_driver->wave_out_play();
430			}
431
432	ossman_	1299	void
433	ossman_	1302	rdpsnd_add_fds(int n, fd_set rfds, fd_set * wfds, struct timeval *tv)
434			{
435			long next_pending;
436
437			if (g_dsp_busy)
438			{
439			FD_SET(g_dsp_fd, wfds);
440			n = (g_dsp_fd > n) ? g_dsp_fd : *n;
441			}
442
443			next_pending = rdpsnd_queue_next_completion();
444			if (next_pending >= 0)
445			{
446			long cur_timeout;
447
448			cur_timeout = tv->tv_sec * 1000000 + tv->tv_usec;
449			if (cur_timeout > next_pending)
450			{
451			tv->tv_sec = next_pending / 1000000;
452			tv->tv_usec = next_pending % 1000000;
453			}
454			}
455			}
456
457			void
458			rdpsnd_check_fds(fd_set * rfds, fd_set * wfds)
459			{
460			rdpsnd_queue_complete_pending();
461
462			if (g_dsp_busy && FD_ISSET(g_dsp_fd, wfds))
463			rdpsnd_play();
464			}
465
466			static void
467	stargo	1254	rdpsnd_queue_write(STREAM s, uint16 tick, uint8 index)
468			{
469			struct audio_packet *packet = &packet_queue[queue_hi];
470			unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE;
471
472	ossman_	1302	if (next_hi == queue_pending)
473	stargo	1254	{
474			error("No space to queue audio packet\n");
475			return;
476			}
477
478			queue_hi = next_hi;
479
480			packet->s = *s;
481			packet->tick = tick;
482			packet->index = index;
483
484	ossman_	1302	gettimeofday(&packet->arrive_tv, NULL);
485
486	stargo	1254	if (!g_dsp_busy)
487	stargo	1255	current_driver->wave_out_play();
488	stargo	1254	}
489
490	ossman_	1299	struct audio_packet *
491	stargo	1254	rdpsnd_queue_current_packet(void)
492			{
493			return &packet_queue[queue_lo];
494			}
495
496	ossman_	1299	BOOL
497	stargo	1254	rdpsnd_queue_empty(void)
498			{
499			return (queue_lo == queue_hi);
500			}
501
502	ossman_	1302	static void
503	stargo	1254	rdpsnd_queue_init(void)
504			{
505	ossman_	1302	queue_pending = queue_lo = queue_hi = 0;
506	stargo	1254	}
507
508	ossman_	1299	void
509	ossman_	1302	rdpsnd_queue_next(unsigned long completed_in_us)
510	stargo	1254	{
511	ossman_	1302	struct audio_packet *packet;
512
513			assert(!rdpsnd_queue_empty());
514
515			packet = &packet_queue[queue_lo];
516
517			gettimeofday(&packet->completion_tv, NULL);
518
519			packet->completion_tv.tv_usec += completed_in_us;
520			packet->completion_tv.tv_sec += packet->completion_tv.tv_usec / 1000000;
521			packet->completion_tv.tv_usec %= 1000000;
522
523	stargo	1254	queue_lo = (queue_lo + 1) % MAX_QUEUE;
524	ossman_	1302
525			rdpsnd_queue_complete_pending();
526	stargo	1254	}
527
528	ossman_	1299	int
529	stargo	1254	rdpsnd_queue_next_tick(void)
530			{
531			if (((queue_lo + 1) % MAX_QUEUE) != queue_hi)
532			{
533			return packet_queue[(queue_lo + 1) % MAX_QUEUE].tick;
534			}
535			else
536			{
537			return (packet_queue[queue_lo].tick + 65535) % 65536;
538			}
539			}
540	ossman_	1302
541			static void
542			rdpsnd_queue_complete_pending(void)
543			{
544			struct timeval now;
545			long elapsed;
546			struct audio_packet *packet;
547
548			gettimeofday(&now, NULL);
549
550			while (queue_pending != queue_lo)
551			{
552			packet = &packet_queue[queue_pending];
553
554			if (now.tv_sec < packet->completion_tv.tv_sec)
555			break;
556
557			if ((now.tv_sec == packet->completion_tv.tv_sec) &&
558			(now.tv_usec < packet->completion_tv.tv_usec))
559			break;
560
561			elapsed = (packet->completion_tv.tv_sec - packet->arrive_tv.tv_sec) * 1000000 +
562			(packet->completion_tv.tv_usec - packet->arrive_tv.tv_usec);
563
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			}