reactos/modules/rosapps/applications/net/tsclient/rdesktop/rdpsnd.c

256 lines
6.2 KiB
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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_SERVERTICK 6
#define RDPSND_NEGOTIATE 7
static STREAM
rdpsnd_init_packet(RDPCLIENT * This, uint16 type, uint16 size)
{
STREAM s;
s = channel_init(This, This->rdpsnd.channel, size + 4);
out_uint16_le(s, type);
out_uint16_le(s, size);
return s;
}
static void
rdpsnd_send(RDPCLIENT * This, STREAM s)
{
#ifdef RDPSND_DEBUG
printf("RDPSND send:\n");
hexdump(s->channel_hdr + 8, s->end - s->channel_hdr - 8);
#endif
channel_send(This, s, This->rdpsnd.channel);
}
void
rdpsnd_send_completion(RDPCLIENT * This, uint16 tick, uint8 packet_index)
{
STREAM s;
s = rdpsnd_init_packet(This, RDPSND_COMPLETION, 4);
out_uint16_le(s, tick + 50);
out_uint8(s, packet_index);
out_uint8(s, 0);
s_mark_end(s);
rdpsnd_send(This, s);
}
static void
rdpsnd_process_negotiate(RDPCLIENT * This, 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 (wave_out_open())
{
wave_out_close();
device_available = True;
}
This->rdpsnd.format_count = 0;
if (s_check_rem(in, 18 * in_format_count))
{
for (i = 0; i < in_format_count; i++)
{
format = &This->rdpsnd.formats[This->rdpsnd.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 && wave_out_format_supported(format))
{
This->rdpsnd.format_count++;
if (This->rdpsnd.format_count == MAX_FORMATS)
break;
}
}
}
out = rdpsnd_init_packet(This, RDPSND_NEGOTIATE | 0x200, 20 + 18 * This->rdpsnd.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, This->rdpsnd.format_count);
out_uint8(out, 0x95); /* pad? */
out_uint16_le(out, 2); /* status */
out_uint8(out, 0x77); /* pad? */
for (i = 0; i < This->rdpsnd.format_count; i++)
{
format = &This->rdpsnd.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(This, out);
}
static void
rdpsnd_process_servertick(RDPCLIENT * This, 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(This, RDPSND_SERVERTICK | 0x2300, 4);
out_uint16_le(out, tick1);
out_uint16_le(out, tick2);
s_mark_end(out);
rdpsnd_send(This, out);
}
static void
rdpsnd_process(RDPCLIENT * This, 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 (!This->rdpsnd.device_open || (format != This->rdpsnd.current_format))
{
if (!This->rdpsnd.device_open && !wave_out_open())
{
rdpsnd_send_completion(This, tick, packet_index);
return;
}
if (!wave_out_set_format(&This->rdpsnd.formats[format]))
{
rdpsnd_send_completion(This, tick, packet_index);
wave_out_close();
This->rdpsnd.device_open = False;
return;
}
This->rdpsnd.device_open = True;
This->rdpsnd.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();
This->rdpsnd.device_open = False;
break;
case RDPSND_NEGOTIATE:
rdpsnd_process_negotiate(This, s);
break;
case RDPSND_SERVERTICK:
rdpsnd_process_servertick(This, s);
break;
case RDPSND_SET_VOLUME:
in_uint32(s, volume);
if (This->rdpsnd.device_open)
{
wave_out_volume((volume & 0xffff), (volume & 0xffff0000) >> 16);
}
break;
default:
unimpl("RDPSND packet type %d\n", type);
break;
}
}
BOOL
rdpsnd_init(RDPCLIENT * This)
{
This->rdpsnd.channel =
channel_register(This, "rdpsnd", CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP,
rdpsnd_process);
return (This->rdpsnd.channel != NULL);
}