guacamole-spice-protocol/src/protocols/rdp/audio.c
2013-06-05 11:00:28 -07:00

180 lines
5.1 KiB
C

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is libguac-client-rdp.
*
* The Initial Developer of the Original Code is
* Michael Jumper.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <guacamole/protocol.h>
#include <guacamole/client.h>
#include <guacamole/stream.h>
#include "audio.h"
#include "client.h"
audio_stream* audio_stream_alloc(guac_client* client, audio_encoder* encoder) {
/* Allocate stream */
audio_stream* audio = (audio_stream*) malloc(sizeof(audio_stream));
audio->client = client;
/* Reset buffer stats */
audio->used = 0;
audio->length = 0x40000;
audio->encoded_data_used = 0;
audio->encoded_data_length = 0x40000;
/* Allocate buffers */
audio->pcm_data = malloc(audio->length);
audio->encoded_data = malloc(audio->encoded_data_length);
/* Assign encoder */
audio->encoder = encoder;
audio->stream = guac_client_alloc_stream(client);
return audio;
}
void audio_stream_begin(audio_stream* audio, int rate, int channels, int bps) {
/* Load PCM properties */
audio->rate = rate;
audio->channels = channels;
audio->bps = bps;
/* Reset write counter */
audio->pcm_bytes_written = 0;
/* Call handler */
audio->encoder->begin_handler(audio);
}
void audio_stream_end(audio_stream* audio) {
double duration;
rdp_guac_client_data* data = (rdp_guac_client_data*) audio->client->data;
/* Flush stream and finish encoding */
audio_stream_flush(audio);
audio->encoder->end_handler(audio);
/* Calculate duration of PCM data */
duration = ((double) (audio->pcm_bytes_written * 1000 * 8))
/ audio->rate / audio->channels / audio->bps;
pthread_mutex_lock(&(data->update_lock));
/* Send audio */
guac_protocol_send_audio(audio->stream->socket,
0, audio->encoder->mimetype,
duration, audio->encoded_data, audio->encoded_data_used);
pthread_mutex_unlock(&(data->update_lock));
/* Clear data */
audio->encoded_data_used = 0;
}
void audio_stream_free(audio_stream* audio) {
free(audio->pcm_data);
free(audio);
}
void audio_stream_write_pcm(audio_stream* audio,
unsigned char* data, int length) {
/* Update counter */
audio->pcm_bytes_written += length;
/* Resize audio buffer if necessary */
if (length > audio->length) {
/* Resize to double provided length */
audio->length = length*2;
audio->pcm_data = realloc(audio->pcm_data, audio->length);
}
/* Flush if necessary */
if (audio->used + length > audio->length)
audio_stream_flush(audio);
/* Append to buffer */
memcpy(&(audio->pcm_data[audio->used]), data, length);
audio->used += length;
}
void audio_stream_flush(audio_stream* audio) {
/* If data in buffer */
if (audio->used != 0) {
/* Write data */
audio->encoder->write_handler(audio,
audio->pcm_data, audio->used);
/* Reset buffer */
audio->used = 0;
}
}
void audio_stream_write_encoded(audio_stream* audio,
unsigned char* data, int length) {
/* Resize audio buffer if necessary */
if (audio->encoded_data_used + length > audio->encoded_data_length) {
/* Increase to double concatenated size to accomodate */
audio->encoded_data_length = (audio->encoded_data_length + length)*2;
audio->encoded_data = realloc(audio->encoded_data,
audio->encoded_data_length);
}
/* Append to buffer */
memcpy(&(audio->encoded_data[audio->encoded_data_used]), data, length);
audio->encoded_data_used += length;
}