void guac_audio_stream_end(guac_audio_stream* audio) {
double duration;
/* Flush stream and finish encoding */
guac_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;
/* Send audio */
guac_protocol_send_audio(audio->client->socket, audio->stream,
audio->stream->index, audio->encoder->mimetype, duration);
guac_protocol_send_blob(audio->client->socket, audio->stream,
audio->encoded_data, audio->encoded_data_used);
guac_protocol_send_end(audio->client->socket, audio->stream);
/* Clear data */
audio->encoded_data_used = 0;
}
/**
* Guacamole client plugin entry point. This function will be called by guacd
* when the protocol associated with this plugin is selected.
*
* @param client
* A newly-allocated guac_client structure representing the client which
* connected to guacd.
*
* @param argc
* The number of arguments within the argv array.
*
* @param argv
* All arguments passed during the Guacamole protocol handshake. These
* arguments correspond identically in both order and number to the
* arguments listed in GUAC_CLIENT_ARGS.
*/
int guac_client_init(guac_client* client, int argc, char** argv) {
/* Validate argument count */
if (argc != STREAMTEST_ARGS_COUNT) {
guac_client_log(client, GUAC_LOG_ERROR, "Wrong number of arguments.");
return 1;
}
/* Allocate stream for media */
streamtest_playback_mode mode;
guac_stream* stream = guac_client_alloc_stream(client);
/* Determine playback mode from mimetype */
if (strncmp(argv[IDX_MIMETYPE], "audio/", 6) == 0) {
mode = STREAMTEST_AUDIO;
guac_client_log(client, GUAC_LOG_DEBUG,
"Recognized type \"%s\" as audio",
argv[IDX_MIMETYPE]);
}
else if (strncmp(argv[IDX_MIMETYPE], "video/", 6) == 0) {
mode = STREAMTEST_VIDEO;
guac_client_log(client, GUAC_LOG_DEBUG,
"Recognized type \"%s\" as video",
argv[IDX_MIMETYPE]);
}
/* Abort if type cannot be recognized */
else {
guac_client_log(client, GUAC_LOG_ERROR,
"Invalid media type \"%s\" (not audio nor video)",
argv[IDX_MIMETYPE]);
return 1;
}
/* Initialize streaming depending on playback mode */
switch (mode) {
/* Set up progress bar for audio streams */
case STREAMTEST_AUDIO:
/* Begin audio stream */
guac_protocol_send_audio(client->socket, stream,
argv[IDX_MIMETYPE]);
/* Init display */
guac_protocol_send_size(client->socket, GUAC_DEFAULT_LAYER,
STREAMTEST_PROGRESS_WIDTH,
STREAMTEST_PROGRESS_HEIGHT);
break;
/* Set up generic video area for video streams */
case STREAMTEST_VIDEO:
/* Begin video stream */
guac_protocol_send_video(client->socket, stream,
GUAC_DEFAULT_LAYER, argv[IDX_MIMETYPE]);
/* Init display */
guac_protocol_send_size(client->socket, GUAC_DEFAULT_LAYER,
client->info.optimal_width,
client->info.optimal_height);
break;
/* There are no other playback modes */
default:
assert(false);
}
/* Attempt to open specified file, abort on error */
int fd = open(argv[IDX_FILENAME], O_RDONLY);
if (fd == -1) {
guac_client_log(client, GUAC_LOG_ERROR,
"Unable to open \"%s\": %s",
argv[IDX_FILENAME], strerror(errno));
return 1;
}
int file_size = streamtest_get_file_size(fd);
if (file_size == -1) {
guac_client_log(client, GUAC_LOG_ERROR,
"Unable to determine size of file \"%s\": %s",
argv[IDX_FILENAME], strerror(errno));
return 1;
}
guac_client_log(client, GUAC_LOG_DEBUG,
"Successfully opened file \"%s\" (%i bytes)",
argv[IDX_FILENAME], file_size);
/* Allocate state structure */
streamtest_state* state = malloc(sizeof(streamtest_state));
/* Set frame duration/size */
state->frame_duration = atoi(argv[IDX_FRAME_USECS]);
state->frame_bytes = atoi(argv[IDX_BYTES_PER_FRAME]);
state->frame_buffer = malloc(state->frame_bytes);
guac_client_log(client, GUAC_LOG_DEBUG,
"Frames will last %i microseconds and contain %i bytes",
state->frame_duration, state->frame_bytes);
/* Start with the file closed, playback not paused */
state->mode = mode;
state->stream = stream;
state->fd = fd;
state->paused = false;
state->file_size = file_size;
/* Set client handlers and data */
client->handle_messages = streamtest_client_message_handler;
client->key_handler = streamtest_client_key_handler;
client->free_handler = streamtest_client_free_handler;
client->data = state;
/* Render initial progress bar */
streamtest_render_progress(client);
guac_socket_flush(client->socket);
/* Initialization complete */
return 0;
}