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/* |
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rdesktop: A Remote Desktop Protocol client. |
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Sound Channel Process Functions |
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Copyright (C) Matthew Chapman 2003 |
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Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003 |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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|
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#include "rdesktop.h" |
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|
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#define RDPSND_CLOSE 1 |
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#define RDPSND_WRITE 2 |
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#define RDPSND_SET_VOLUME 3 |
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#define RDPSND_UNKNOWN4 4 |
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#define RDPSND_COMPLETION 5 |
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#define RDPSND_UNKNOWN6 6 |
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#define RDPSND_NEGOTIATE 7 |
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|
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#define MAX_FORMATS 10 |
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|
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static VCHANNEL *rdpsnd_channel; |
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|
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static BOOL device_open; |
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static WAVEFORMATEX formats[MAX_FORMATS]; |
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static unsigned int format_count; |
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static unsigned int current_format; |
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|
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STREAM |
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rdpsnd_init_packet(uint16 type, uint16 size) |
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{ |
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STREAM s; |
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|
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s = channel_init(rdpsnd_channel, size+4); |
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out_uint16_le(s, type); |
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out_uint16_le(s, size); |
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return s; |
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} |
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|
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void |
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rdpsnd_send(STREAM s) |
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{ |
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#ifdef RDPSND_DEBUG |
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printf("RDPSND send:\n"); |
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hexdump(s->channel_hdr+8, s->end-s->channel_hdr-8); |
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#endif |
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|
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channel_send(s, rdpsnd_channel); |
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} |
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|
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void rdpsnd_send_completion(uint16 tick, uint8 packet_index) |
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{ |
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STREAM s; |
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|
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s = rdpsnd_init_packet(RDPSND_COMPLETION, 4); |
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out_uint16_le(s, tick+50); |
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out_uint8(s, packet_index); |
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out_uint8(s, 0); |
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s_mark_end(s); |
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rdpsnd_send(s); |
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} |
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|
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void |
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rdpsnd_process_negotiate(STREAM in) |
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{ |
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unsigned int in_format_count, i; |
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WAVEFORMATEX *format; |
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STREAM out; |
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BOOL device_available = False; |
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|
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in_uint8s(in, 14); /* flags, volume, pitch, UDP port */ |
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in_uint16_le(in, in_format_count); |
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in_uint8s(in, 4); /* pad, status, pad */ |
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|
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if (wave_out_open()) |
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{ |
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wave_out_close(); |
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device_available = True; |
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} |
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|
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format_count = 0; |
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if (s_check_rem(in, 18*in_format_count)) |
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{ |
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for (i = 0; i < in_format_count; i++) |
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{ |
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format = &formats[format_count]; |
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in_uint16_le(in, format->wFormatTag); |
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in_uint16_le(in, format->nChannels); |
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in_uint32_le(in, format->nSamplesPerSec); |
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in_uint32_le(in, format->nAvgBytesPerSec); |
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in_uint16_le(in, format->nBlockAlign); |
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in_uint16_le(in, format->wBitsPerSample); |
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in_uint16_le(in, format->cbSize); |
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|
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/* read in the buffer of unknown use */ |
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int readcnt = format->cbSize; |
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int discardcnt = 0; |
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if (format->cbSize > MAX_CBSIZE) |
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{ |
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fprintf(stderr, "cbSize too large for buffer: %d\n", format->cbSize); |
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readcnt = MAX_CBSIZE; |
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discardcnt = format->cbSize - MAX_CBSIZE; |
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} |
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in_uint8a(in, format->cb, readcnt); |
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in_uint8s(in, discardcnt); |
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|
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if (device_available && wave_out_format_supported(format)) |
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{ |
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format_count++; |
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if (format_count == MAX_FORMATS) |
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break; |
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} |
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} |
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} |
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|
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out = rdpsnd_init_packet(RDPSND_NEGOTIATE | 0x200, 20 + 18*format_count); |
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out_uint32_le(out, 3); /* flags */ |
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out_uint32(out, 0xffffffff); /* volume */ |
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out_uint32(out, 0); /* pitch */ |
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out_uint16(out, 0); /* UDP port */ |
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|
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out_uint16_le(out, format_count); |
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out_uint8(out, 0x95); /* pad? */ |
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out_uint16_le(out, 2); /* status */ |
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out_uint8(out, 0x77); /* pad? */ |
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|
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for (i = 0; i < format_count; i++) |
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{ |
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format = &formats[i]; |
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out_uint16_le(out, format->wFormatTag); |
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out_uint16_le(out, format->nChannels); |
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out_uint32_le(out, format->nSamplesPerSec); |
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out_uint32_le(out, format->nAvgBytesPerSec); |
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out_uint16_le(out, format->nBlockAlign); |
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out_uint16_le(out, format->wBitsPerSample); |
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out_uint16(out, 0); /* cbSize */ |
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} |
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|
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s_mark_end(out); |
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rdpsnd_send(out); |
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} |
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|
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void |
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rdpsnd_process_unknown6(STREAM in) |
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{ |
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uint16 unknown1, unknown2; |
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STREAM out; |
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|
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/* in_uint8s(in, 4); unknown */ |
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in_uint16_le(in, unknown1); |
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in_uint16_le(in, unknown2); |
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|
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out = rdpsnd_init_packet(RDPSND_UNKNOWN6 | 0x2300, 4); |
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out_uint16_le(out, unknown1); |
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out_uint16_le(out, unknown2); |
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s_mark_end(out); |
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rdpsnd_send(out); |
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} |
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|
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void |
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rdpsnd_process(STREAM s) |
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{ |
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uint8 type; |
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uint16 datalen; |
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uint32 volume; |
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static uint16 tick, format; |
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static uint8 packet_index; |
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static BOOL awaiting_data_packet; |
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|
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#ifdef RDPSND_DEBUG |
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printf("RDPSND recv:\n"); |
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hexdump(s->p, s->end-s->p); |
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#endif |
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|
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if (awaiting_data_packet) |
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{ |
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if (format >= MAX_FORMATS) |
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{ |
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error("RDPSND: Invalid format index\n"); |
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return; |
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} |
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|
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if (!device_open || (format != current_format)) |
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{ |
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if (!device_open && !wave_out_open()) |
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{ |
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rdpsnd_send_completion(tick, packet_index); |
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return; |
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} |
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if (!wave_out_set_format(&formats[format])) |
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{ |
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rdpsnd_send_completion(tick, packet_index); |
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wave_out_close(); |
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device_open = False; |
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return; |
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} |
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device_open = True; |
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current_format = format; |
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} |
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|
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wave_out_write(s, tick, packet_index); |
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awaiting_data_packet = False; |
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return; |
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} |
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|
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in_uint8(s, type); |
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in_uint8s(s, 1); /* unknown? */ |
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in_uint16_le(s, datalen); |
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|
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switch (type) |
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{ |
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case RDPSND_WRITE: |
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in_uint16_le(s, tick); |
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in_uint16_le(s, format); |
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in_uint8(s, packet_index); |
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awaiting_data_packet = True; |
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break; |
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case RDPSND_CLOSE: |
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wave_out_close(); |
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device_open = False; |
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break; |
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case RDPSND_NEGOTIATE: |
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rdpsnd_process_negotiate(s); |
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break; |
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case RDPSND_UNKNOWN6: |
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rdpsnd_process_unknown6(s); |
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break; |
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case RDPSND_SET_VOLUME: |
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in_uint32(s, volume); |
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if ( device_open ) |
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{ |
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wave_out_volume((volume & 0xffff), (volume & 0xffff0000) >> 16); |
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} |
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break; |
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default: |
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unimpl("RDPSND packet type %d\n", type); |
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break; |
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} |
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} |
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|
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BOOL |
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rdpsnd_init(void) |
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{ |
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rdpsnd_channel = |
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channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP, |
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rdpsnd_process); |
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return (rdpsnd_channel != NULL); |
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} |
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