rdesktop/trunk/rdpsnd.c

/* 
   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 "rdesktop.h"

#define RDPSND_CLOSE            1
#define RDPSND_WRITE            2
#define RDPSND_SET_VOLUME       3
#define RDPSND_UNKNOWN4         4
#define RDPSND_COMPLETION       5
#define RDPSND_UNKNOWN6         6
#define RDPSND_NEGOTIATE        7

#define MAX_FORMATS             10

static VCHANNEL *rdpsnd_channel;

static BOOL device_open;
static WAVEFORMATEX formats[MAX_FORMATS];
static unsigned int format_count;
static unsigned int current_format;

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;
}

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);
}

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

        s = rdpsnd_init_packet(RDPSND_COMPLETION, 4);
        out_uint16_le(s, tick+50);
        out_uint8(s, packet_index);
        out_uint8(s, 0);
        s_mark_end(s);
        rdpsnd_send(s);
}

void
rdpsnd_process_negotiate(STREAM in)
{
        unsigned int in_format_count, i;
        WAVEFORMATEX *format;
        STREAM out;

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

        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);

                        if (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);
}

void
rdpsnd_process_unknown6(STREAM in)
{
        uint16 unknown1, unknown2;
        STREAM out;

        /* in_uint8s(in, 4); unknown */
        in_uint16_le(in, unknown1);
        in_uint16_le(in, unknown2);

        out = rdpsnd_init_packet(RDPSND_UNKNOWN6 | 0x2300, 4);
        out_uint16_le(out, unknown1);
        out_uint16_le(out, unknown2);
        s_mark_end(out);
        rdpsnd_send(out);
}

void
rdpsnd_process(STREAM s)
{
        uint8 type;
        uint16 datalen;
        static uint16 tick, format;
        static uint8 packet_index;
        static BOOL awaiting_data_packet;

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

                wave_out_write(s, 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);
                awaiting_data_packet = True;
                break;
        case RDPSND_CLOSE:
                wave_out_close();
                device_open = False;
                break;
        case RDPSND_NEGOTIATE:
                rdpsnd_process_negotiate(s);
                break;
        case RDPSND_UNKNOWN6:
                rdpsnd_process_unknown6(s);
                break;
        case RDPSND_SET_VOLUME:
                /* uint32 volume */
                break;
        default:
                unimpl("RDPSND packet type %d\n", type);
                break;
        }
}

BOOL
rdpsnd_init(void)
{
        rdpsnd_channel =
                channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP,
                                 rdpsnd_process);
        return (rdpsnd_channel != NULL);
}
1	/*
2	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	#include "rdesktop.h"
23
24	#define RDPSND_CLOSE 1
25	#define RDPSND_WRITE 2
26	#define RDPSND_SET_VOLUME 3
27	#define RDPSND_UNKNOWN4 4
28	#define RDPSND_COMPLETION 5
29	#define RDPSND_UNKNOWN6 6
30	#define RDPSND_NEGOTIATE 7
31
32	#define MAX_FORMATS 10
33
34	static VCHANNEL *rdpsnd_channel;
35
36	static BOOL device_open;
37	static WAVEFORMATEX formats[MAX_FORMATS];
38	static unsigned int format_count;
39	static unsigned int current_format;
40
41	STREAM
42	rdpsnd_init_packet(uint16 type, uint16 size)
43	{
44	STREAM s;
45
46	s = channel_init(rdpsnd_channel, size+4);
47	out_uint16_le(s, type);
48	out_uint16_le(s, size);
49	return s;
50	}
51
52	void
53	rdpsnd_send(STREAM s)
54	{
55	#ifdef RDPSND_DEBUG
56	printf("RDPSND send:\n");
57	hexdump(s->channel_hdr+8, s->end-s->channel_hdr-8);
58	#endif
59
60	channel_send(s, rdpsnd_channel);
61	}
62
63	void rdpsnd_send_completion(uint16 tick, uint8 packet_index)
64	{
65	STREAM s;
66
67	s = rdpsnd_init_packet(RDPSND_COMPLETION, 4);
68	out_uint16_le(s, tick+50);
69	out_uint8(s, packet_index);
70	out_uint8(s, 0);
71	s_mark_end(s);
72	rdpsnd_send(s);
73	}
74
75	void
76	rdpsnd_process_negotiate(STREAM in)
77	{
78	unsigned int in_format_count, i;
79	WAVEFORMATEX *format;
80	STREAM out;
81
82	in_uint8s(in, 14); /* flags, volume, pitch, UDP port */
83	in_uint16_le(in, in_format_count);
84	in_uint8s(in, 4); /* pad, status, pad */
85
86	format_count = 0;
87	if (s_check_rem(in, 18*in_format_count))
88	{
89	for (i = 0; i < in_format_count; i++)
90	{
91	format = &formats[format_count];
92	in_uint16_le(in, format->wFormatTag);
93	in_uint16_le(in, format->nChannels);
94	in_uint32_le(in, format->nSamplesPerSec);
95	in_uint32_le(in, format->nAvgBytesPerSec);
96	in_uint16_le(in, format->nBlockAlign);
97	in_uint16_le(in, format->wBitsPerSample);
98	in_uint16_le(in, format->cbSize);
99
100	if (wave_out_format_supported(format))
101	{
102	format_count++;
103	if (format_count == MAX_FORMATS)
104	break;
105	}
106	}
107	}
108
109	out = rdpsnd_init_packet(RDPSND_NEGOTIATE \| 0x200, 20 + 18*format_count);
110	out_uint32_le(out, 3); /* flags */
111	out_uint32(out, 0xffffffff); /* volume */
112	out_uint32(out, 0); /* pitch */
113	out_uint16(out, 0); /* UDP port */
114
115	out_uint16_le(out, format_count);
116	out_uint8(out, 0x95); /* pad? */
117	out_uint16_le(out, 2); /* status */
118	out_uint8(out, 0x77); /* pad? */
119
120	for (i = 0; i < format_count; i++)
121	{
122	format = &formats[i];
123	out_uint16_le(out, format->wFormatTag);
124	out_uint16_le(out, format->nChannels);
125	out_uint32_le(out, format->nSamplesPerSec);
126	out_uint32_le(out, format->nAvgBytesPerSec);
127	out_uint16_le(out, format->nBlockAlign);
128	out_uint16_le(out, format->wBitsPerSample);
129	out_uint16(out, 0); /* cbSize */
130	}
131
132	s_mark_end(out);
133	rdpsnd_send(out);
134	}
135
136	void
137	rdpsnd_process_unknown6(STREAM in)
138	{
139	uint16 unknown1, unknown2;
140	STREAM out;
141
142	/* in_uint8s(in, 4); unknown */
143	in_uint16_le(in, unknown1);
144	in_uint16_le(in, unknown2);
145
146	out = rdpsnd_init_packet(RDPSND_UNKNOWN6 \| 0x2300, 4);
147	out_uint16_le(out, unknown1);
148	out_uint16_le(out, unknown2);
149	s_mark_end(out);
150	rdpsnd_send(out);
151	}
152
153	void
154	rdpsnd_process(STREAM s)
155	{
156	uint8 type;
157	uint16 datalen;
158	static uint16 tick, format;
159	static uint8 packet_index;
160	static BOOL awaiting_data_packet;
161
162	#ifdef RDPSND_DEBUG
163	printf("RDPSND recv:\n");
164	hexdump(s->p, s->end-s->p);
165	#endif
166
167	if (awaiting_data_packet)
168	{
169	if (format >= MAX_FORMATS)
170	{
171	error("RDPSND: Invalid format index\n");
172	return;
173	}
174
175	if (!device_open \|\| (format != current_format))
176	{
177	if (!device_open && !wave_out_open())
178	{
179	rdpsnd_send_completion(tick, packet_index);
180	return;
181	}
182	if (!wave_out_set_format(&formats[format]))
183	{
184	rdpsnd_send_completion(tick, packet_index);
185	wave_out_close();
186	device_open = False;
187	return;
188	}
189	device_open = True;
190	current_format = format;
191	}
192
193	wave_out_write(s, tick, packet_index);
194	awaiting_data_packet = False;
195	return;
196	}
197
198	in_uint8(s, type);
199	in_uint8s(s, 1); /* unknown? */
200	in_uint16_le(s, datalen);
201
202	switch (type)
203	{
204	case RDPSND_WRITE:
205	in_uint16_le(s, tick);
206	in_uint16_le(s, format);
207	in_uint8(s, packet_index);
208	awaiting_data_packet = True;
209	break;
210	case RDPSND_CLOSE:
211	wave_out_close();
212	device_open = False;
213	break;
214	case RDPSND_NEGOTIATE:
215	rdpsnd_process_negotiate(s);
216	break;
217	case RDPSND_UNKNOWN6:
218	rdpsnd_process_unknown6(s);
219	break;
220	case RDPSND_SET_VOLUME:
221	/* uint32 volume */
222	break;
223	default:
224	unimpl("RDPSND packet type %d\n", type);
225	break;
226	}
227	}
228
229	BOOL
230	rdpsnd_init(void)
231	{
232	rdpsnd_channel =
233	channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED \| CHANNEL_OPTION_ENCRYPT_RDP,
234	rdpsnd_process);
235	return (rdpsnd_channel != NULL);
236	}