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;
        BOOL device_available = False;

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

        if (wave_out_open())
        {
                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);

                        if (device_available && 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;
        uint32 volume;
        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:
                in_uint32(s, volume);
                if ( device_open )
                {
                        wave_out_volume((volume & 0xffff), (volume & 0xffff0000) >> 16);
                }
                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	BOOL device_available = False;
82
83	in_uint8s(in, 14); /* flags, volume, pitch, UDP port */
84	in_uint16_le(in, in_format_count);
85	in_uint8s(in, 4); /* pad, status, pad */
86
87	if (wave_out_open())
88	{
89	wave_out_close();
90	device_available = True;
91	}
92
93	format_count = 0;
94	if (s_check_rem(in, 18*in_format_count))
95	{
96	for (i = 0; i < in_format_count; i++)
97	{
98	format = &formats[format_count];
99	in_uint16_le(in, format->wFormatTag);
100	in_uint16_le(in, format->nChannels);
101	in_uint32_le(in, format->nSamplesPerSec);
102	in_uint32_le(in, format->nAvgBytesPerSec);
103	in_uint16_le(in, format->nBlockAlign);
104	in_uint16_le(in, format->wBitsPerSample);
105	in_uint16_le(in, format->cbSize);
106
107	if (device_available && wave_out_format_supported(format))
108	{
109	format_count++;
110	if (format_count == MAX_FORMATS)
111	break;
112	}
113	}
114	}
115
116	out = rdpsnd_init_packet(RDPSND_NEGOTIATE \| 0x200, 20 + 18*format_count);
117	out_uint32_le(out, 3); /* flags */
118	out_uint32(out, 0xffffffff); /* volume */
119	out_uint32(out, 0); /* pitch */
120	out_uint16(out, 0); /* UDP port */
121
122	out_uint16_le(out, format_count);
123	out_uint8(out, 0x95); /* pad? */
124	out_uint16_le(out, 2); /* status */
125	out_uint8(out, 0x77); /* pad? */
126
127	for (i = 0; i < format_count; i++)
128	{
129	format = &formats[i];
130	out_uint16_le(out, format->wFormatTag);
131	out_uint16_le(out, format->nChannels);
132	out_uint32_le(out, format->nSamplesPerSec);
133	out_uint32_le(out, format->nAvgBytesPerSec);
134	out_uint16_le(out, format->nBlockAlign);
135	out_uint16_le(out, format->wBitsPerSample);
136	out_uint16(out, 0); /* cbSize */
137	}
138
139	s_mark_end(out);
140	rdpsnd_send(out);
141	}
142
143	void
144	rdpsnd_process_unknown6(STREAM in)
145	{
146	uint16 unknown1, unknown2;
147	STREAM out;
148
149	/* in_uint8s(in, 4); unknown */
150	in_uint16_le(in, unknown1);
151	in_uint16_le(in, unknown2);
152
153	out = rdpsnd_init_packet(RDPSND_UNKNOWN6 \| 0x2300, 4);
154	out_uint16_le(out, unknown1);
155	out_uint16_le(out, unknown2);
156	s_mark_end(out);
157	rdpsnd_send(out);
158	}
159
160	void
161	rdpsnd_process(STREAM s)
162	{
163	uint8 type;
164	uint16 datalen;
165	uint32 volume;
166	static uint16 tick, format;
167	static uint8 packet_index;
168	static BOOL awaiting_data_packet;
169
170	#ifdef RDPSND_DEBUG
171	printf("RDPSND recv:\n");
172	hexdump(s->p, s->end-s->p);
173	#endif
174
175	if (awaiting_data_packet)
176	{
177	if (format >= MAX_FORMATS)
178	{
179	error("RDPSND: Invalid format index\n");
180	return;
181	}
182
183	if (!device_open \|\| (format != current_format))
184	{
185	if (!device_open && !wave_out_open())
186	{
187	rdpsnd_send_completion(tick, packet_index);
188	return;
189	}
190	if (!wave_out_set_format(&formats[format]))
191	{
192	rdpsnd_send_completion(tick, packet_index);
193	wave_out_close();
194	device_open = False;
195	return;
196	}
197	device_open = True;
198	current_format = format;
199	}
200
201	wave_out_write(s, tick, packet_index);
202	awaiting_data_packet = False;
203	return;
204	}
205
206	in_uint8(s, type);
207	in_uint8s(s, 1); /* unknown? */
208	in_uint16_le(s, datalen);
209
210	switch (type)
211	{
212	case RDPSND_WRITE:
213	in_uint16_le(s, tick);
214	in_uint16_le(s, format);
215	in_uint8(s, packet_index);
216	awaiting_data_packet = True;
217	break;
218	case RDPSND_CLOSE:
219	wave_out_close();
220	device_open = False;
221	break;
222	case RDPSND_NEGOTIATE:
223	rdpsnd_process_negotiate(s);
224	break;
225	case RDPSND_UNKNOWN6:
226	rdpsnd_process_unknown6(s);
227	break;
228	case RDPSND_SET_VOLUME:
229	in_uint32(s, volume);
230	if ( device_open )
231	{
232	wave_out_volume((volume & 0xffff), (volume & 0xffff0000) >> 16);
233	}
234	break;
235	default:
236	unimpl("RDPSND packet type %d\n", type);
237	break;
238	}
239	}
240
241	BOOL
242	rdpsnd_init(void)
243	{
244	rdpsnd_channel =
245	channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED \| CHANNEL_OPTION_ENCRYPT_RDP,
246	rdpsnd_process);
247	return (rdpsnd_channel != NULL);
248	}