MODFORM-21 add a bit more error checking to mod_shout write function

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@10538 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/formats/mod_shout/mod_shout.c

@@ -902,12 +902,22 @@ static switch_status_t shout_file_read(switch_file_handle_t *handle, void *data,
 
 static switch_status_t shout_file_write(switch_file_handle_t *handle, void *data, size_t *len)
 {
-	shout_context_t *context = handle->private_info;
+	shout_context_t *context;
 	unsigned char mp3buf[8192] = "";
 	int rlen;
 	int16_t *audio = data;
 	int nsamples = *len;
 
+	if (!handle) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error no handle\n");
+		return SWITCH_STATUS_FALSE;
+	}
+
+	if (!(context = handle->private_info)) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error no context\n");
+		return SWITCH_STATUS_FALSE;
+	}
+
 	if (context->shout && !context->shout_init) {
 		context->shout_init++;
 		if (shout_open(context->shout) != SHOUTERR_SUCCESS) {
@@ -918,7 +928,7 @@ static switch_status_t shout_file_write(switch_file_handle_t *handle, void *data
 		launch_write_stream_thread(context);
 	}
 
-	if (handle->handler) {
+	if (handle->handler && context->audio_mutex) {
 		switch_mutex_lock(context->audio_mutex);
 		if (context->audio_buffer) {
 			if (!switch_buffer_write(context->audio_buffer, data, (nsamples * sizeof(int16_t) * handle->channels))) {
@@ -928,11 +938,15 @@ static switch_status_t shout_file_write(switch_file_handle_t *handle, void *data
 		} else {
 			context->err++;
 		}
+
 		switch_mutex_unlock(context->audio_mutex);
 		if (context->err) {
 			return SWITCH_STATUS_FALSE;
 		}
-	} else {
+
+		handle->sample_count += *len;
+		return SWITCH_STATUS_SUCCESS;
+	}
 
 	if (!context->lame_ready) {
 		lame_init_params(context->gfp);
@@ -970,7 +984,6 @@ static switch_status_t shout_file_write(switch_file_handle_t *handle, void *data
 			return SWITCH_STATUS_FALSE;
 		}
 	}
-	}
 
 	handle->sample_count += *len;