276 lines
9.2 KiB
C
276 lines
9.2 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 <pthread.h>
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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 "audio.h"
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#include "service.h"
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#include "messages.h"
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#include "client.h"
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/* MESSAGE HANDLERS */
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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,
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audio_stream* audio, STREAM* input_stream) {
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uint16 wNumberOfFormats;
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uint16 nFormat;
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uint16 wVersion;
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STREAM* output_stream;
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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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rdp_guac_client_data* guac_client_data =
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(rdp_guac_client_data*) audio->client->data;
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stream_seek_uint32(input_stream); /* dwFlags */
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stream_seek_uint32(input_stream); /* dwVolume */
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stream_seek_uint32(input_stream); /* dwPitch */
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stream_seek_uint16(input_stream); /* wDGramPort */
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stream_read_uint16(input_stream, wNumberOfFormats);
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stream_read_uint8(input_stream, rdpsnd->cBlockNo); /* cLastBlockConfirmed */
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stream_read_uint16(input_stream, wVersion);
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stream_seek_uint8(input_stream); /* 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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output_stream = stream_new(24);
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stream_write_uint8(output_stream, SNDC_FORMATS); /* msgType */
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stream_write_uint8(output_stream, 0); /* bPad */
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stream_seek_uint16(output_stream); /* BodySize */
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stream_write_uint32(output_stream, TSSNDCAPS_ALIVE); /* dwFlags */
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stream_write_uint32(output_stream, 0); /* dwVolume */
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stream_write_uint32(output_stream, 0); /* dwPitch */
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stream_write_uint16_be(output_stream, 0); /* wDGramPort */
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stream_seek_uint16(output_stream); /* wNumberOfFormats */
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stream_write_uint8(output_stream, 0); /* cLastBlockConfirmed */
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stream_write_uint16(output_stream, 6); /* wVersion */
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stream_write_uint8(output_stream, 0); /* bPad */
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for (nFormat = 0; nFormat < wNumberOfFormats; nFormat++) {
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stream_get_mark(input_stream, format_mark);
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format = &out_formats[n_out_formats];
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stream_read_uint16(input_stream, format->wFormatTag);
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stream_read_uint16(input_stream, format->nChannels);
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stream_read_uint32(input_stream, format->nSamplesPerSec);
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stream_seek_uint32(input_stream); /* nAvgBytesPerSec */
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stream_read_uint16(input_stream, format->nBlockAlign);
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stream_read_uint16(input_stream, format->wBitsPerSample);
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stream_read_uint16(input_stream, format->cbSize);
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stream_get_mark(input_stream, data_mark);
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stream_seek(input_stream, format->cbSize);
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format->data = NULL;
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if (format->wFormatTag == WAVE_FORMAT_PCM) {
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/* If can fit another format, accept it */
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if (rdpsnd->format_count < GUAC_RDP_MAX_FORMATS) {
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/* Add channel */
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int current = rdpsnd->format_count++;
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rdpsnd->formats[current].rate = format->nSamplesPerSec;
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rdpsnd->formats[current].channels = format->nChannels;
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rdpsnd->formats[current].bps = format->wBitsPerSample;
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/* Log format */
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guac_client_log_info(audio->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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/* Store as accepted for future response */
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stream_check_size(output_stream, 18 + format->cbSize);
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stream_write(output_stream, format_mark, 18 + format->cbSize);
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if (format->cbSize > 0) {
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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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/* Otherwise, log that we dropped one */
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else
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guac_client_log_info(audio->client,
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"Dropped valid 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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}
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}
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xfree(out_formats);
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pos = stream_get_pos(output_stream);
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stream_set_pos(output_stream, 2);
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stream_write_uint16(output_stream, pos - 4);
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stream_set_pos(output_stream, 18);
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stream_write_uint16(output_stream, n_out_formats);
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stream_set_pos(output_stream, pos);
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pthread_mutex_lock(&(guac_client_data->rdp_lock));
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svc_plugin_send((rdpSvcPlugin*)rdpsnd, output_stream);
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if (wVersion >= 6) {
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/* Respond with guality mode */
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output_stream = stream_new(8);
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stream_write_uint8(output_stream, SNDC_QUALITYMODE); /* msgType */
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stream_write_uint8(output_stream, 0); /* bPad */
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stream_write_uint16(output_stream, 4); /* BodySize */
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stream_write_uint16(output_stream, HIGH_QUALITY); /* wQualityMode */
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stream_write_uint16(output_stream, 0); /* Reserved */
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svc_plugin_send((rdpSvcPlugin*)rdpsnd, output_stream);
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}
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pthread_mutex_unlock(&(guac_client_data->rdp_lock));
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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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audio_stream* audio, STREAM* input_stream) {
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uint16 wTimeStamp;
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uint16 wPackSize;
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STREAM* output_stream;
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rdp_guac_client_data* guac_client_data =
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(rdp_guac_client_data*) audio->client->data;
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/* Read timestamp */
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stream_read_uint16(input_stream, wTimeStamp);
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stream_read_uint16(input_stream, wPackSize);
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/* Send training response */
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output_stream = stream_new(8);
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stream_write_uint8(output_stream, SNDC_TRAINING); /* msgType */
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stream_write_uint8(output_stream, 0); /* bPad */
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stream_write_uint16(output_stream, 4); /* BodySize */
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stream_write_uint16(output_stream, wTimeStamp);
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stream_write_uint16(output_stream, wPackSize);
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pthread_mutex_lock(&(guac_client_data->rdp_lock));
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svc_plugin_send((rdpSvcPlugin*) rdpsnd, output_stream);
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pthread_mutex_unlock(&(guac_client_data->rdp_lock));
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}
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void guac_rdpsnd_process_message_wave_info(guac_rdpsndPlugin* rdpsnd, audio_stream* audio, STREAM* input_stream, uint16 BodySize) {
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uint16 wFormatNo;
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/* Read wave information */
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stream_read_uint16(input_stream, rdpsnd->wTimeStamp);
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stream_read_uint16(input_stream, wFormatNo);
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stream_read_uint8(input_stream, rdpsnd->cBlockNo);
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stream_seek(input_stream, 3); /* bPad */
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stream_read(input_stream, 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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/* Init stream with requested format */
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audio_stream_begin(audio,
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rdpsnd->formats[wFormatNo].rate,
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rdpsnd->formats[wFormatNo].channels,
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rdpsnd->formats[wFormatNo].bps);
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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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audio_stream* audio, STREAM* input_stream) {
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rdpSvcPlugin* plugin = (rdpSvcPlugin*)rdpsnd;
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STREAM* output_stream;
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unsigned char* buffer = stream_get_head(input_stream);
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rdp_guac_client_data* guac_client_data =
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(rdp_guac_client_data*) audio->client->data;
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rdpsnd->expectingWave = 0;
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memcpy(buffer, rdpsnd->waveData, 4);
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/* Write rest of audio packet */
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audio_stream_write_pcm(audio, buffer, rdpsnd->waveDataSize);
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audio_stream_end(audio);
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output_stream = stream_new(8);
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stream_write_uint8(output_stream, SNDC_WAVECONFIRM);
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stream_write_uint8(output_stream, 0);
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stream_write_uint16(output_stream, 4);
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stream_write_uint16(output_stream, rdpsnd->wTimeStamp);
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stream_write_uint8(output_stream, rdpsnd->cBlockNo); /* cConfirmedBlockNo */
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stream_write_uint8(output_stream, 0); /* bPad */
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pthread_mutex_lock(&(guac_client_data->rdp_lock));
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svc_plugin_send(plugin, output_stream);
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pthread_mutex_unlock(&(guac_client_data->rdp_lock));
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rdpsnd->plugin.interval_ms = 10;
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}
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void guac_rdpsnd_process_message_setvolume(guac_rdpsndPlugin* rdpsnd,
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audio_stream* audio, STREAM* input_stream) {
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/* Ignored for now */
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uint32 dwVolume;
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stream_read_uint32(input_stream, dwVolume);
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}
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void guac_rdpsnd_process_message_close(guac_rdpsndPlugin* rdpsnd,
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audio_stream* audio) {
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rdpsnd->plugin.interval_ms = 10;
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}
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