308 lines
8.6 KiB
C
308 lines
8.6 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol client.
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* Audio Output Virtual Channel
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*
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* Copyright 2009-2011 Jay Sorg
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* Copyright 2010-2011 Vic Lee
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <freerdp/constants.h>
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#include <freerdp/types.h>
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#include <freerdp/utils/memory.h>
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#include <freerdp/utils/stream.h>
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#include <freerdp/utils/list.h>
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#include <freerdp/utils/load_plugin.h>
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#include <freerdp/utils/svc_plugin.h>
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#include <guacamole/client.h>
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#include "rdpsnd_main.h"
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void guac_rdpsnd_process_receive(rdpSvcPlugin* plugin,
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STREAM* data_in) {
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guac_rdpsndPlugin* rdpsnd = (guac_rdpsndPlugin*) plugin;
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uint8 msgType;
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uint16 BodySize;
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if (rdpsnd->expectingWave) {
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rdpsnd_process_message_wave(rdpsnd, data_in);
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return;
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}
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/* Read event */
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stream_read_uint8(data_in, msgType); /* msgType */
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stream_seek_uint8(data_in); /* bPad */
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stream_read_uint16(data_in, BodySize);
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switch (msgType) {
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case SNDC_FORMATS:
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guac_rdpsnd_process_message_formats(rdpsnd, data_in);
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break;
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case SNDC_TRAINING:
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guac_rdpsnd_process_message_training(rdpsnd, data_in);
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break;
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case SNDC_WAVE:
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guac_rdpsnd_process_message_wave_info(rdpsnd, data_in, BodySize);
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break;
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case SNDC_CLOSE:
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guac_rdpsnd_process_message_close(rdpsnd);
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break;
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case SNDC_SETVOLUME:
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guac_rdpsnd_process_message_setvolume(rdpsnd, data_in);
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break;
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default:
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/*DEBUG_WARN("unknown msgType %d", msgType);*/
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break;
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}
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}
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/* receives a list of server supported formats and returns a list
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of client supported formats */
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void guac_rdpsnd_process_message_formats(guac_rdpsndPlugin* rdpsnd, STREAM* data_in) {
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rdpSvcPlugin* plugin = (rdpSvcPlugin*)rdpsnd;
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/* Get client from plugin */
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guac_client* client = (guac_client*)
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plugin->channel_entry_points.pExtendedData;
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uint16 wNumberOfFormats;
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uint16 nFormat;
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uint16 wVersion;
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STREAM* data_out;
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rdpsndFormat* out_formats;
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uint16 n_out_formats;
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rdpsndFormat* format;
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uint8* format_mark;
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uint8* data_mark;
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int pos;
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stream_seek_uint32(data_in); /* dwFlags */
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stream_seek_uint32(data_in); /* dwVolume */
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stream_seek_uint32(data_in); /* dwPitch */
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stream_seek_uint16(data_in); /* wDGramPort */
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stream_read_uint16(data_in, wNumberOfFormats);
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stream_read_uint8(data_in, rdpsnd->cBlockNo); /* cLastBlockConfirmed */
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stream_read_uint16(data_in, wVersion);
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stream_seek_uint8(data_in); /* bPad */
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out_formats = (rdpsndFormat*)
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xzalloc(wNumberOfFormats * sizeof(rdpsndFormat));
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n_out_formats = 0;
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data_out = stream_new(24);
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stream_write_uint8(data_out, SNDC_FORMATS); /* msgType */
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stream_write_uint8(data_out, 0); /* bPad */
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stream_seek_uint16(data_out); /* BodySize */
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stream_write_uint32(data_out, TSSNDCAPS_ALIVE); /* dwFlags */
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stream_write_uint32(data_out, 0); /* dwVolume */
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stream_write_uint32(data_out, 0); /* dwPitch */
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stream_write_uint16_be(data_out, 0); /* wDGramPort */
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stream_seek_uint16(data_out); /* wNumberOfFormats */
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stream_write_uint8(data_out, 0); /* cLastBlockConfirmed */
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stream_write_uint16(data_out, 6); /* wVersion */
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stream_write_uint8(data_out, 0); /* bPad */
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for (nFormat = 0; nFormat < wNumberOfFormats; nFormat++) {
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stream_get_mark(data_in, format_mark);
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format = &out_formats[n_out_formats];
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stream_read_uint16(data_in, format->wFormatTag);
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stream_read_uint16(data_in, format->nChannels);
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stream_read_uint32(data_in, format->nSamplesPerSec);
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stream_seek_uint32(data_in); /* nAvgBytesPerSec */
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stream_read_uint16(data_in, format->nBlockAlign);
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stream_read_uint16(data_in, format->wBitsPerSample);
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stream_read_uint16(data_in, format->cbSize);
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stream_get_mark(data_in, data_mark);
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stream_seek(data_in, format->cbSize);
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format->data = NULL;
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if (format->wFormatTag == WAVE_FORMAT_PCM) {
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guac_client_log_info(client,
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"Accepted format: %i-bit PCM with %i channels at "
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"%i Hz",
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format->wBitsPerSample,
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format->nChannels,
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format->nSamplesPerSec);
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stream_check_size(data_out, 18 + format->cbSize);
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stream_write(data_out, format_mark, 18 + format->cbSize);
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if (format->cbSize > 0)
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{
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format->data = xmalloc(format->cbSize);
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memcpy(format->data, data_mark, format->cbSize);
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}
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n_out_formats++;
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}
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}
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xfree(out_formats);
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pos = stream_get_pos(data_out);
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stream_set_pos(data_out, 2);
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stream_write_uint16(data_out, pos - 4);
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stream_set_pos(data_out, 18);
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stream_write_uint16(data_out, n_out_formats);
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stream_set_pos(data_out, pos);
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svc_plugin_send((rdpSvcPlugin*)rdpsnd, data_out);
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if (wVersion >= 6) {
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/* Respond with guality mode */
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data_out = stream_new(8);
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stream_write_uint8(data_out, SNDC_QUALITYMODE); /* msgType */
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stream_write_uint8(data_out, 0); /* bPad */
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stream_write_uint16(data_out, 4); /* BodySize */
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stream_write_uint16(data_out, HIGH_QUALITY); /* wQualityMode */
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stream_write_uint16(data_out, 0); /* Reserved */
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svc_plugin_send((rdpSvcPlugin*)rdpsnd, data_out);
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}
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}
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/* server is getting a feel of the round trip time */
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void guac_rdpsnd_process_message_training(guac_rdpsndPlugin* rdpsnd,
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STREAM* data_in) {
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uint16 wTimeStamp;
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uint16 wPackSize;
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STREAM* data_out;
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/* Read timestamp */
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stream_read_uint16(data_in, wTimeStamp);
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stream_read_uint16(data_in, wPackSize);
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/* Send training response */
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data_out = stream_new(8);
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stream_write_uint8(data_out, SNDC_TRAINING); /* msgType */
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stream_write_uint8(data_out, 0); /* bPad */
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stream_write_uint16(data_out, 4); /* BodySize */
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stream_write_uint16(data_out, wTimeStamp);
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stream_write_uint16(data_out, wPackSize);
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svc_plugin_send((rdpSvcPlugin*) rdpsnd, data_out);
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}
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void guac_rdpsnd_process_message_wave_info(guac_rdpsndPlugin* rdpsnd, STREAM* data_in, uint16 BodySize) {
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uint16 wFormatNo;
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/* Read wave information */
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stream_read_uint16(data_in, rdpsnd->wTimeStamp);
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stream_read_uint16(data_in, wFormatNo);
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stream_read_uint8(data_in, rdpsnd->cBlockNo);
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stream_seek(data_in, 3); /* bPad */
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stream_read(data_in, rdpsnd->waveData, 4);
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/* Read wave in next iteration */
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rdpsnd->waveDataSize = BodySize - 8;
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rdpsnd->expectingWave = true;
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}
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/* header is not removed from data in this function */
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void rdpsnd_process_message_wave(guac_rdpsndPlugin* rdpsnd,
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STREAM* data_in) {
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rdpSvcPlugin* plugin = (rdpSvcPlugin*)rdpsnd;
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/* Get client from plugin */
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guac_client* client = (guac_client*)
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plugin->channel_entry_points.pExtendedData;
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STREAM* data_out;
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int size;
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unsigned char* buffer;
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rdpsnd->expectingWave = 0;
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memcpy(stream_get_head(data_in), rdpsnd->waveData, 4);
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if (stream_get_size(data_in) != rdpsnd->waveDataSize) {
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return;
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}
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buffer = stream_get_head(data_in);
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size = stream_get_size(data_in);
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guac_client_log_info(client, "Got sound: %i bytes.", size);
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data_out = stream_new(8);
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stream_write_uint8(data_out, SNDC_WAVECONFIRM);
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stream_write_uint8(data_out, 0);
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stream_write_uint16(data_out, 4);
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stream_write_uint16(data_out, rdpsnd->wTimeStamp);
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stream_write_uint8(data_out, rdpsnd->cBlockNo); /* cConfirmedBlockNo */
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stream_write_uint8(data_out, 0); /* bPad */
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svc_plugin_send(plugin, data_out);
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rdpsnd->plugin.interval_ms = 10;
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}
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void guac_rdpsnd_process_connect(rdpSvcPlugin* plugin) {
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/* Get client from plugin */
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guac_client* client = (guac_client*)
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plugin->channel_entry_points.pExtendedData;
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/* Log that sound has been loaded */
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guac_client_log_info(client, "guac_rdpsnd connected.");
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}
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void guac_rdpsnd_process_message_setvolume(guac_rdpsndPlugin* rdpsnd,
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STREAM* data_in) {
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/* Ignored for now */
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uint32 dwVolume;
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stream_read_uint32(data_in, dwVolume);
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}
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void guac_rdpsnd_process_message_close(guac_rdpsndPlugin* rdpsnd) {
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rdpsnd->plugin.interval_ms = 10;
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}
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void guac_rdpsnd_process_terminate(rdpSvcPlugin* plugin) {
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xfree(plugin);
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}
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void guac_rdpsnd_process_event(rdpSvcPlugin* plugin, RDP_EVENT* event) {
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freerdp_event_free(event);
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}
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DEFINE_SVC_PLUGIN(guac_rdpsnd, "rdpsnd",
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CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP)
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