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https://github.com/reactos/reactos.git
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256 lines
6.2 KiB
C
256 lines
6.2 KiB
C
/* -*- c-basic-offset: 8 -*-
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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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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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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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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "rdesktop.h"
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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_SERVERTICK 6
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#define RDPSND_NEGOTIATE 7
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static STREAM
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rdpsnd_init_packet(RDPCLIENT * This, uint16 type, uint16 size)
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{
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STREAM s;
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s = channel_init(This, This->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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static void
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rdpsnd_send(RDPCLIENT * This, 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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channel_send(This, s, This->rdpsnd.channel);
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}
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void
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rdpsnd_send_completion(RDPCLIENT * This, uint16 tick, uint8 packet_index)
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{
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STREAM s;
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s = rdpsnd_init_packet(This, 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(This, s);
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}
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static void
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rdpsnd_process_negotiate(RDPCLIENT * This, 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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int readcnt;
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int discardcnt;
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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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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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This->rdpsnd.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 = &This->rdpsnd.formats[This->rdpsnd.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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/* read in the buffer of unknown use */
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readcnt = format->cbSize;
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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",
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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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if (device_available && wave_out_format_supported(format))
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{
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This->rdpsnd.format_count++;
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if (This->rdpsnd.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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out = rdpsnd_init_packet(This, RDPSND_NEGOTIATE | 0x200, 20 + 18 * This->rdpsnd.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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out_uint16_le(out, This->rdpsnd.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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for (i = 0; i < This->rdpsnd.format_count; i++)
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{
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format = &This->rdpsnd.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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s_mark_end(out);
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rdpsnd_send(This, out);
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}
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static void
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rdpsnd_process_servertick(RDPCLIENT * This, STREAM in)
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{
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uint16 tick1, tick2;
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STREAM out;
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/* in_uint8s(in, 4); unknown */
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in_uint16_le(in, tick1);
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in_uint16_le(in, tick2);
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out = rdpsnd_init_packet(This, RDPSND_SERVERTICK | 0x2300, 4);
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out_uint16_le(out, tick1);
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out_uint16_le(out, tick2);
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s_mark_end(out);
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rdpsnd_send(This, out);
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}
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static void
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rdpsnd_process(RDPCLIENT * This, 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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#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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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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if (!This->rdpsnd.device_open || (format != This->rdpsnd.current_format))
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{
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if (!This->rdpsnd.device_open && !wave_out_open())
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{
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rdpsnd_send_completion(This, tick, packet_index);
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return;
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}
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if (!wave_out_set_format(&This->rdpsnd.formats[format]))
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{
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rdpsnd_send_completion(This, tick, packet_index);
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wave_out_close();
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This->rdpsnd.device_open = False;
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return;
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}
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This->rdpsnd.device_open = True;
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This->rdpsnd.current_format = format;
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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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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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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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This->rdpsnd.device_open = False;
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break;
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case RDPSND_NEGOTIATE:
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rdpsnd_process_negotiate(This, s);
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break;
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case RDPSND_SERVERTICK:
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rdpsnd_process_servertick(This, 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 (This->rdpsnd.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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BOOL
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rdpsnd_init(RDPCLIENT * This)
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{
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This->rdpsnd.channel =
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channel_register(This, "rdpsnd", CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP,
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rdpsnd_process);
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return (This->rdpsnd.channel != NULL);
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}
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