| 1 |
/* -*- c-basic-offset: 8 -*- |
| 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 |
#include "rdpsnd.h" |
| 24 |
|
| 25 |
#define RDPSND_CLOSE 1 |
| 26 |
#define RDPSND_WRITE 2 |
| 27 |
#define RDPSND_SET_VOLUME 3 |
| 28 |
#define RDPSND_UNKNOWN4 4 |
| 29 |
#define RDPSND_COMPLETION 5 |
| 30 |
#define RDPSND_SERVERTICK 6 |
| 31 |
#define RDPSND_NEGOTIATE 7 |
| 32 |
|
| 33 |
#define MAX_FORMATS 10 |
| 34 |
#define MAX_QUEUE 10 |
| 35 |
|
| 36 |
BOOL g_dsp_busy = False; |
| 37 |
int g_dsp_fd; |
| 38 |
|
| 39 |
static VCHANNEL *rdpsnd_channel; |
| 40 |
|
| 41 |
static BOOL device_open; |
| 42 |
static WAVEFORMATEX formats[MAX_FORMATS]; |
| 43 |
static unsigned int format_count; |
| 44 |
static unsigned int current_format; |
| 45 |
static unsigned int queue_hi, queue_lo; |
| 46 |
static struct audio_packet packet_queue[MAX_QUEUE]; |
| 47 |
|
| 48 |
static STREAM |
| 49 |
rdpsnd_init_packet(uint16 type, uint16 size) |
| 50 |
{ |
| 51 |
STREAM s; |
| 52 |
|
| 53 |
s = channel_init(rdpsnd_channel, size + 4); |
| 54 |
out_uint16_le(s, type); |
| 55 |
out_uint16_le(s, size); |
| 56 |
return s; |
| 57 |
} |
| 58 |
|
| 59 |
static void |
| 60 |
rdpsnd_send(STREAM s) |
| 61 |
{ |
| 62 |
#ifdef RDPSND_DEBUG |
| 63 |
printf("RDPSND send:\n"); |
| 64 |
hexdump(s->channel_hdr + 8, s->end - s->channel_hdr - 8); |
| 65 |
#endif |
| 66 |
|
| 67 |
channel_send(s, rdpsnd_channel); |
| 68 |
} |
| 69 |
|
| 70 |
void |
| 71 |
rdpsnd_send_completion(uint16 tick, uint8 packet_index) |
| 72 |
{ |
| 73 |
STREAM s; |
| 74 |
|
| 75 |
s = rdpsnd_init_packet(RDPSND_COMPLETION, 4); |
| 76 |
out_uint16_le(s, tick); |
| 77 |
out_uint8(s, packet_index); |
| 78 |
out_uint8(s, 0); |
| 79 |
s_mark_end(s); |
| 80 |
rdpsnd_send(s); |
| 81 |
} |
| 82 |
|
| 83 |
static void |
| 84 |
rdpsnd_process_negotiate(STREAM in) |
| 85 |
{ |
| 86 |
unsigned int in_format_count, i; |
| 87 |
WAVEFORMATEX *format; |
| 88 |
STREAM out; |
| 89 |
BOOL device_available = False; |
| 90 |
int readcnt; |
| 91 |
int discardcnt; |
| 92 |
|
| 93 |
in_uint8s(in, 14); /* flags, volume, pitch, UDP port */ |
| 94 |
in_uint16_le(in, in_format_count); |
| 95 |
in_uint8s(in, 4); /* pad, status, pad */ |
| 96 |
|
| 97 |
if (wave_out_open()) |
| 98 |
{ |
| 99 |
wave_out_close(); |
| 100 |
device_available = True; |
| 101 |
} |
| 102 |
|
| 103 |
format_count = 0; |
| 104 |
if (s_check_rem(in, 18 * in_format_count)) |
| 105 |
{ |
| 106 |
for (i = 0; i < in_format_count; i++) |
| 107 |
{ |
| 108 |
format = &formats[format_count]; |
| 109 |
in_uint16_le(in, format->wFormatTag); |
| 110 |
in_uint16_le(in, format->nChannels); |
| 111 |
in_uint32_le(in, format->nSamplesPerSec); |
| 112 |
in_uint32_le(in, format->nAvgBytesPerSec); |
| 113 |
in_uint16_le(in, format->nBlockAlign); |
| 114 |
in_uint16_le(in, format->wBitsPerSample); |
| 115 |
in_uint16_le(in, format->cbSize); |
| 116 |
|
| 117 |
/* read in the buffer of unknown use */ |
| 118 |
readcnt = format->cbSize; |
| 119 |
discardcnt = 0; |
| 120 |
if (format->cbSize > MAX_CBSIZE) |
| 121 |
{ |
| 122 |
fprintf(stderr, "cbSize too large for buffer: %d\n", |
| 123 |
format->cbSize); |
| 124 |
readcnt = MAX_CBSIZE; |
| 125 |
discardcnt = format->cbSize - MAX_CBSIZE; |
| 126 |
} |
| 127 |
in_uint8a(in, format->cb, readcnt); |
| 128 |
in_uint8s(in, discardcnt); |
| 129 |
|
| 130 |
if (device_available && wave_out_format_supported(format)) |
| 131 |
{ |
| 132 |
format_count++; |
| 133 |
if (format_count == MAX_FORMATS) |
| 134 |
break; |
| 135 |
} |
| 136 |
} |
| 137 |
} |
| 138 |
|
| 139 |
out = rdpsnd_init_packet(RDPSND_NEGOTIATE | 0x200, 20 + 18 * format_count); |
| 140 |
out_uint32_le(out, 3); /* flags */ |
| 141 |
out_uint32(out, 0xffffffff); /* volume */ |
| 142 |
out_uint32(out, 0); /* pitch */ |
| 143 |
out_uint16(out, 0); /* UDP port */ |
| 144 |
|
| 145 |
out_uint16_le(out, format_count); |
| 146 |
out_uint8(out, 0x95); /* pad? */ |
| 147 |
out_uint16_le(out, 2); /* status */ |
| 148 |
out_uint8(out, 0x77); /* pad? */ |
| 149 |
|
| 150 |
for (i = 0; i < format_count; i++) |
| 151 |
{ |
| 152 |
format = &formats[i]; |
| 153 |
out_uint16_le(out, format->wFormatTag); |
| 154 |
out_uint16_le(out, format->nChannels); |
| 155 |
out_uint32_le(out, format->nSamplesPerSec); |
| 156 |
out_uint32_le(out, format->nAvgBytesPerSec); |
| 157 |
out_uint16_le(out, format->nBlockAlign); |
| 158 |
out_uint16_le(out, format->wBitsPerSample); |
| 159 |
out_uint16(out, 0); /* cbSize */ |
| 160 |
} |
| 161 |
|
| 162 |
s_mark_end(out); |
| 163 |
rdpsnd_send(out); |
| 164 |
} |
| 165 |
|
| 166 |
static void |
| 167 |
rdpsnd_process_servertick(STREAM in) |
| 168 |
{ |
| 169 |
uint16 tick1, tick2; |
| 170 |
STREAM out; |
| 171 |
|
| 172 |
/* in_uint8s(in, 4); unknown */ |
| 173 |
in_uint16_le(in, tick1); |
| 174 |
in_uint16_le(in, tick2); |
| 175 |
|
| 176 |
out = rdpsnd_init_packet(RDPSND_SERVERTICK | 0x2300, 4); |
| 177 |
out_uint16_le(out, tick1); |
| 178 |
out_uint16_le(out, tick2); |
| 179 |
s_mark_end(out); |
| 180 |
rdpsnd_send(out); |
| 181 |
} |
| 182 |
|
| 183 |
static void |
| 184 |
rdpsnd_process(STREAM s) |
| 185 |
{ |
| 186 |
uint8 type; |
| 187 |
uint16 datalen; |
| 188 |
uint32 volume; |
| 189 |
static uint16 tick, format; |
| 190 |
static uint8 packet_index; |
| 191 |
static BOOL awaiting_data_packet; |
| 192 |
|
| 193 |
#ifdef RDPSND_DEBUG |
| 194 |
printf("RDPSND recv:\n"); |
| 195 |
hexdump(s->p, s->end - s->p); |
| 196 |
#endif |
| 197 |
|
| 198 |
if (awaiting_data_packet) |
| 199 |
{ |
| 200 |
if (format >= MAX_FORMATS) |
| 201 |
{ |
| 202 |
error("RDPSND: Invalid format index\n"); |
| 203 |
return; |
| 204 |
} |
| 205 |
|
| 206 |
if (!device_open || (format != current_format)) |
| 207 |
{ |
| 208 |
if (!device_open && !wave_out_open()) |
| 209 |
{ |
| 210 |
rdpsnd_send_completion(tick, packet_index); |
| 211 |
return; |
| 212 |
} |
| 213 |
if (!wave_out_set_format(&formats[format])) |
| 214 |
{ |
| 215 |
rdpsnd_send_completion(tick, packet_index); |
| 216 |
wave_out_close(); |
| 217 |
device_open = False; |
| 218 |
return; |
| 219 |
} |
| 220 |
device_open = True; |
| 221 |
current_format = format; |
| 222 |
} |
| 223 |
|
| 224 |
rdpsnd_queue_write(s, tick, packet_index); |
| 225 |
awaiting_data_packet = False; |
| 226 |
return; |
| 227 |
} |
| 228 |
|
| 229 |
in_uint8(s, type); |
| 230 |
in_uint8s(s, 1); /* unknown? */ |
| 231 |
in_uint16_le(s, datalen); |
| 232 |
|
| 233 |
switch (type) |
| 234 |
{ |
| 235 |
case RDPSND_WRITE: |
| 236 |
in_uint16_le(s, tick); |
| 237 |
in_uint16_le(s, format); |
| 238 |
in_uint8(s, packet_index); |
| 239 |
awaiting_data_packet = True; |
| 240 |
break; |
| 241 |
case RDPSND_CLOSE: |
| 242 |
wave_out_close(); |
| 243 |
device_open = False; |
| 244 |
break; |
| 245 |
case RDPSND_NEGOTIATE: |
| 246 |
rdpsnd_process_negotiate(s); |
| 247 |
break; |
| 248 |
case RDPSND_SERVERTICK: |
| 249 |
rdpsnd_process_servertick(s); |
| 250 |
break; |
| 251 |
case RDPSND_SET_VOLUME: |
| 252 |
in_uint32(s, volume); |
| 253 |
if (device_open) |
| 254 |
{ |
| 255 |
wave_out_volume((volume & 0xffff), (volume & 0xffff0000) >> 16); |
| 256 |
} |
| 257 |
break; |
| 258 |
default: |
| 259 |
unimpl("RDPSND packet type %d\n", type); |
| 260 |
break; |
| 261 |
} |
| 262 |
} |
| 263 |
|
| 264 |
BOOL |
| 265 |
rdpsnd_init(void) |
| 266 |
{ |
| 267 |
rdpsnd_channel = |
| 268 |
channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP, |
| 269 |
rdpsnd_process); |
| 270 |
|
| 271 |
return (rdpsnd_channel != NULL); |
| 272 |
} |
| 273 |
|
| 274 |
void |
| 275 |
rdpsnd_queue_write(STREAM s, uint16 tick, uint8 index) |
| 276 |
{ |
| 277 |
struct audio_packet *packet = &packet_queue[queue_hi]; |
| 278 |
unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE; |
| 279 |
|
| 280 |
if (next_hi == queue_lo) |
| 281 |
{ |
| 282 |
error("No space to queue audio packet\n"); |
| 283 |
return; |
| 284 |
} |
| 285 |
|
| 286 |
queue_hi = next_hi; |
| 287 |
|
| 288 |
packet->s = *s; |
| 289 |
packet->tick = tick; |
| 290 |
packet->index = index; |
| 291 |
packet->s.p += 4; |
| 292 |
|
| 293 |
/* we steal the data buffer from s, give it a new one */ |
| 294 |
s->data = malloc(s->size); |
| 295 |
|
| 296 |
if (!g_dsp_busy) |
| 297 |
wave_out_play(); |
| 298 |
} |
| 299 |
|
| 300 |
inline struct audio_packet * |
| 301 |
rdpsnd_queue_current_packet(void) |
| 302 |
{ |
| 303 |
return &packet_queue[queue_lo]; |
| 304 |
} |
| 305 |
|
| 306 |
inline BOOL |
| 307 |
rdpsnd_queue_empty(void) |
| 308 |
{ |
| 309 |
return (queue_lo == queue_hi); |
| 310 |
} |
| 311 |
|
| 312 |
inline void |
| 313 |
rdpsnd_queue_init(void) |
| 314 |
{ |
| 315 |
queue_lo = queue_hi = 0; |
| 316 |
} |
| 317 |
|
| 318 |
inline void |
| 319 |
rdpsnd_queue_next(void) |
| 320 |
{ |
| 321 |
free(packet_queue[queue_lo].s.data); |
| 322 |
queue_lo = (queue_lo + 1) % MAX_QUEUE; |
| 323 |
} |
| 324 |
|
| 325 |
inline int |
| 326 |
rdpsnd_queue_next_tick(void) |
| 327 |
{ |
| 328 |
if (((queue_lo + 1) % MAX_QUEUE) != queue_hi) |
| 329 |
{ |
| 330 |
return packet_queue[(queue_lo + 1) % MAX_QUEUE].tick; |
| 331 |
} |
| 332 |
else |
| 333 |
{ |
| 334 |
return (packet_queue[queue_lo].tick + 65535) % 65536; |
| 335 |
} |
| 336 |
} |
Parent Directory
| 
Revision Log