void guac_pa_start_stream(guac_client* client) {
vnc_guac_client_data* client_data = (vnc_guac_client_data*) client->data;
pa_context* context;
guac_client_log_info(client, "Starting audio stream");
guac_audio_stream_begin(client_data->audio,
GUAC_VNC_AUDIO_RATE,
GUAC_VNC_AUDIO_CHANNELS,
GUAC_VNC_AUDIO_BPS);
/* Init main loop */
client_data->pa_mainloop = pa_threaded_mainloop_new();
/* Create context */
context = pa_context_new(
pa_threaded_mainloop_get_api(client_data->pa_mainloop),
"Guacamole Audio");
/* Set up context */
pa_context_set_state_callback(context, __context_state_callback, client);
pa_context_connect(context, client_data->pa_servername,
PA_CONTEXT_NOAUTOSPAWN, NULL);
/* Start loop */
pa_threaded_mainloop_start(client_data->pa_mainloop);
}
static void __stream_read_callback(pa_stream* stream, size_t length,
void* data) {
guac_client* client = (guac_client*) data;
vnc_guac_client_data* client_data = (vnc_guac_client_data*) client->data;
guac_audio_stream* audio = client_data->audio;
const void* buffer;
/* Read data */
pa_stream_peek(stream, &buffer, &length);
/* Write data */
guac_audio_stream_write_pcm(audio, buffer, length);
/* Flush occasionally */
if (audio->pcm_bytes_written > GUAC_VNC_PCM_WRITE_RATE) {
guac_audio_stream_end(audio);
guac_audio_stream_begin(client_data->audio,
GUAC_VNC_AUDIO_RATE,
GUAC_VNC_AUDIO_CHANNELS,
GUAC_VNC_AUDIO_BPS);
}
/* Advance buffer */
pa_stream_drop(stream);
}
static void __stream_read_callback(pa_stream* stream, size_t length,
void* data) {
guac_client* client = (guac_client*) data;
vnc_guac_client_data* client_data = (vnc_guac_client_data*) client->data;
guac_audio_stream* audio = client_data->audio;
const void* buffer;
/* Read data */
pa_stream_peek(stream, &buffer, &length);
/* Avoid sending silence unless data is waiting to be flushed */
if (audio->pcm_bytes_written != 0 || !guac_pa_is_silence(buffer, length)) {
/* Write data */
guac_audio_stream_write_pcm(audio, buffer, length);
/* Flush occasionally */
if (audio->pcm_bytes_written > GUAC_VNC_PCM_WRITE_RATE) {
guac_audio_stream_end(audio);
guac_audio_stream_begin(client_data->audio,
GUAC_VNC_AUDIO_RATE,
GUAC_VNC_AUDIO_CHANNELS,
GUAC_VNC_AUDIO_BPS);
guac_socket_flush(client->socket);
}
}
/* Advance buffer */
pa_stream_drop(stream);
}
