add string params to ladspa so you can connect files to audio ports (string…

add string params to ladspa so you can connect files to audio ports (string params don't count towards number params)

src/mod/applications/mod_ladspa/mod_ladspa.c

@@ -52,11 +52,16 @@ typedef struct {
 	const LADSPA_Descriptor *ldesc;
 	LADSPA_Handle handle;
 	LADSPA_Data config[MAX_INDEX];
+	int num_idx;
+	char *str_config[MAX_INDEX];
+	int str_idx;
 	uint8_t has_config[MAX_INDEX];
 	int skip;
 	LADSPA_Data in_buf[SWITCH_RECOMMENDED_BUFFER_SIZE];
+	LADSPA_Data file_buf[SWITCH_RECOMMENDED_BUFFER_SIZE];
 	LADSPA_Data out_buf[SWITCH_RECOMMENDED_BUFFER_SIZE];
 	LADSPA_Data out_ports[MAX_INDEX];
+	switch_file_handle_t fh;
 } switch_ladspa_t;
 
 
@@ -260,8 +265,8 @@ static switch_bool_t ladspa_callback(switch_media_bug_t *bug, void *user_data, s
 		{
 			switch_codec_implementation_t read_impl = { 0 };
 			LADSPA_PortDescriptor port_desc;
-			int i = 0, j = 0, k = 0;
-
+			int i = 0, j = 0, k = 0, str_idx = 0;
+			
 			switch_core_session_get_read_impl(pvt->session, &read_impl);
 
 			if (!(pvt->library_handle = loadLADSPAPluginLibrary(pvt->plugin_name))) {
@@ -309,7 +314,47 @@ static switch_bool_t ladspa_callback(switch_media_bug_t *bug, void *user_data, s
 				}
 
 				if (LADSPA_IS_PORT_INPUT(port_desc) && LADSPA_IS_PORT_AUDIO(port_desc)) {
-					pvt->ldesc->connect_port(pvt->handle, i, pvt->in_buf);
+					int mapped = 0;
+
+					if (pvt->str_idx && !zstr(pvt->str_config[str_idx])) {
+
+						if (!strcasecmp(pvt->str_config[str_idx], "none")) {
+							switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(pvt->session), SWITCH_LOG_DEBUG, "CONNECT NOTHING to port: %s\n", 
+											  pvt->ldesc->PortNames[i]
+											  );
+							mapped = 1;
+						} else if (!strncasecmp(pvt->str_config[str_idx], "file:", 5)) {
+							char *file = pvt->str_config[str_idx] + 5;
+							
+							if (switch_core_file_open(&pvt->fh,
+													  file,
+													  read_impl.number_of_channels,
+													  read_impl.actual_samples_per_second, 
+													  SWITCH_FILE_FLAG_READ | SWITCH_FILE_DATA_SHORT, NULL) != SWITCH_STATUS_SUCCESS) {
+								switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(pvt->session), SWITCH_LOG_ERROR, "Cannot open file: %s\n", file);
+								return SWITCH_FALSE;
+							}
+							
+							
+							switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(pvt->session), SWITCH_LOG_DEBUG, "CONNECT FILE [%s] to port: %s\n", 
+											  file,
+											  pvt->ldesc->PortNames[i]
+											  );
+
+							pvt->ldesc->connect_port(pvt->handle, i, pvt->file_buf);
+							mapped = 1;
+						}
+
+						str_idx++;
+					}
+
+					if (!mapped) {
+						pvt->ldesc->connect_port(pvt->handle, i, pvt->in_buf);
+						switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(pvt->session), SWITCH_LOG_DEBUG, "CONNECT CHANNEL AUDIO to port: %s\n", 
+										  pvt->ldesc->PortNames[i]
+										  );
+					}
+
 				}
 
 				if (LADSPA_IS_PORT_OUTPUT(port_desc)) {
@@ -327,6 +372,10 @@ static switch_bool_t ladspa_callback(switch_media_bug_t *bug, void *user_data, s
 	case SWITCH_ABC_TYPE_CLOSE:
 		{
 
+			if (switch_test_flag((&pvt->fh), SWITCH_FILE_OPEN)) {
+				switch_core_file_close(&pvt->fh);
+			}
+
 			if (pvt->handle && pvt->ldesc) {
 				pvt->ldesc->cleanup(pvt->handle);
 			}
@@ -341,7 +390,9 @@ static switch_bool_t ladspa_callback(switch_media_bug_t *bug, void *user_data, s
 	case SWITCH_ABC_TYPE_READ_REPLACE:
 		{
 			switch_frame_t *rframe;
-			int16_t *slin;
+			int16_t *slin, abuf[SWITCH_RECOMMENDED_BUFFER_SIZE] =  { 0 };
+			switch_size_t olen = 0;
+
 
 			if (type == SWITCH_ABC_TYPE_READ_REPLACE) {
 				rframe = switch_core_media_bug_get_read_replace_frame(bug);
@@ -353,7 +404,37 @@ static switch_bool_t ladspa_callback(switch_media_bug_t *bug, void *user_data, s
 			
 			if (switch_channel_media_ready(channel)) {
 				switch_short_to_float(slin, pvt->in_buf, rframe->samples);
+
+				if (switch_test_flag((&pvt->fh), SWITCH_FILE_OPEN)) {
+					olen = rframe->samples;
+					if (switch_core_file_read(&pvt->fh, abuf, &olen) != SWITCH_STATUS_SUCCESS) {
+						switch_codec_implementation_t read_impl = { 0 };
+						char *file = switch_core_session_strdup(pvt->session, pvt->fh.file_path);
+						switch_core_session_get_read_impl(pvt->session, &read_impl);
+
+						switch_core_file_close(&pvt->fh);
+						
+						if (switch_core_file_open(&pvt->fh,
+												  file,
+												  read_impl.number_of_channels,
+												  read_impl.actual_samples_per_second, 
+												  SWITCH_FILE_FLAG_READ | SWITCH_FILE_DATA_SHORT, NULL) != SWITCH_STATUS_SUCCESS) {
+							switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(pvt->session), SWITCH_LOG_ERROR, "Cannot open file: %s\n", file);
+							return SWITCH_FALSE;
+						}						
+
+						olen = rframe->samples;
+						if (switch_core_file_read(&pvt->fh, abuf, &olen) != SWITCH_STATUS_SUCCESS) {
+							switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(pvt->session), SWITCH_LOG_ERROR, "Cannot READ file: %s\n", file);
+							return SWITCH_FALSE;
+						}
+					}
+					
+					switch_short_to_float(abuf, pvt->file_buf, olen);
+				}
+
 				pvt->ldesc->run(pvt->handle, rframe->samples);
+
 				switch_float_to_short(pvt->out_buf, slin, rframe->samples);
 			}
 
@@ -446,8 +527,17 @@ switch_status_t ladspa_session(switch_core_session_t *session, const char *flags
 	argc = switch_split(dparams, ' ', argv);
 
 	for (i = 0; i < argc; i++) {
-		pvt->config[i] = atof(argv[i]);
-		pvt->has_config[i] = 1;
+		if (switch_is_number(argv[i])) {
+			if (pvt->num_idx < MAX_INDEX) {
+				pvt->config[pvt->num_idx] = atof(argv[i]);
+				pvt->has_config[pvt->num_idx] = 1;
+				pvt->num_idx++;
+			}
+		} else {
+			if (pvt->str_idx < MAX_INDEX) {
+				pvt->str_config[pvt->str_idx++] = switch_core_session_strdup(session, argv[i]);
+			}
+		}
 	}
 
 	if (switch_channel_pre_answer(channel) != SWITCH_STATUS_SUCCESS) {