/** Parse MRCP speech-length value */
static apt_bool_t mrcp_speech_length_value_parse(mrcp_speech_length_value_t *speech_length, const apt_str_t *value, apr_pool_t *pool)
{
if(!value->length) {
return FALSE;
}
switch(*value->buf) {
case '+': speech_length->type = SPEECH_LENGTH_TYPE_NUMERIC_POSITIVE; break;
case '-': speech_length->type = SPEECH_LENGTH_TYPE_NUMERIC_NEGATIVE; break;
default : speech_length->type = SPEECH_LENGTH_TYPE_TEXT;
}
if(speech_length->type == SPEECH_LENGTH_TYPE_TEXT) {
apt_string_copy(&speech_length->value.tag,value,pool);
}
else {
mrcp_numeric_speech_length_t *numeric = &speech_length->value.numeric;
apt_str_t str;
apt_text_stream_t stream;
stream.text = *value;
apt_text_stream_reset(&stream);
stream.pos++;
if(apt_text_field_read(&stream,APT_TOKEN_SP,TRUE,&str) == FALSE) {
return FALSE;
}
numeric->length = apt_size_value_parse(&str);
if(apt_text_field_read(&stream,APT_TOKEN_SP,TRUE,&str) == FALSE) {
return FALSE;
}
numeric->unit = apt_string_table_value_parse(speech_unit_string_table,SPEECH_UNIT_COUNT,&str);
}
return TRUE;
}
/** Parse MRCP response-line */
static apt_bool_t mrcp_response_line_parse(mrcp_start_line_t *start_line, apt_text_stream_t *stream)
{
apt_str_t field;
start_line->length = 0;
if(start_line->version == MRCP_VERSION_2) {
if(apt_text_field_read(stream,APT_TOKEN_SP,TRUE,&field) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot parse message-length in response-line");
return FALSE;
}
start_line->length = apt_size_value_parse(&field);
}
if(apt_text_field_read(stream,APT_TOKEN_SP,TRUE,&field) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot parse request-id in response-line");
return FALSE;
}
start_line->request_id = mrcp_request_id_parse(&field);
if(apt_text_field_read(stream,APT_TOKEN_SP,TRUE,&field) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot parse status-code in response-line");
return FALSE;
}
start_line->status_code = mrcp_status_code_parse(&field);
if(apt_text_field_read(stream,APT_TOKEN_SP,TRUE,&field) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot parse request-state in response-line");
return FALSE;
}
start_line->request_state = mrcp_request_state_parse(&field);
return TRUE;
}
/** Parse RTSP transport port range */
static apt_bool_t rtsp_port_range_parse(rtsp_port_range_t *port_range, apt_text_stream_t *stream)
{
apt_str_t value;
/* read min value */
if(apt_text_field_read(stream,'-',TRUE,&value) == FALSE) {
return FALSE;
}
port_range->min = (apr_port_t)apt_size_value_parse(&value);
/* read optional max value */
if(apt_text_field_read(stream,';',TRUE,&value) == TRUE) {
port_range->max = (apr_port_t)apt_size_value_parse(&value);
}
return TRUE;
}
/** Parse name=value pair */
static apt_bool_t apt_pair_parse(apt_pair_t *pair, const apt_str_t *field, apr_pool_t *pool)
{
apt_text_stream_t stream;
apt_str_t item;
stream.text = *field;
apt_text_stream_reset(&stream);
/* read name */
if(apt_text_field_read(&stream,'=',TRUE,&item) == FALSE) {
return FALSE;
}
apt_string_copy(&pair->name,&item,pool);
/* read value */
apt_text_field_read(&stream,';',TRUE,&item);
apt_string_copy(&pair->value,&item,pool);
return TRUE;
}
/** Parse text value of RTSP transport attrib (source/destination, e.t.c) */
static apt_bool_t rtsp_transport_attrib_value_parse(apt_str_t *value, apt_text_stream_t *stream, apr_pool_t *pool)
{
apt_str_t field;
/* read value */
if(apt_text_field_read(stream,';',TRUE,&field) == FALSE) {
return FALSE;
}
apt_string_copy(value,&field,pool);
return TRUE;
}
/** Parse RTSP transport protocol (RTP/AVP[/UDP]) */
static apt_bool_t rtsp_transport_protocol_parse(rtsp_transport_t *transport, const apt_str_t *value)
{
apt_str_t field;
apt_text_stream_t stream;
stream.text = *value;
stream.pos = stream.text.buf;
/* set the defaults */
transport->protocol = RTSP_TRANSPORT_RTP;
transport->profile = RTSP_PROFILE_AVP;
transport->lower_protocol = RTSP_LOWER_TRANSPORT_UDP;
/* read transport protocol (RTP) */
if(apt_text_field_read(&stream,'/',TRUE,&field) == FALSE) {
return FALSE;
}
transport->protocol = apt_string_table_id_find(rtsp_transport_string_table,RTSP_TRANSPORT_COUNT,&field);
if(transport->protocol >= RTSP_TRANSPORT_COUNT) {
return FALSE;
}
/* read transport profile (AVP) */
if(apt_text_field_read(&stream,'/',TRUE,&field) == FALSE) {
return FALSE;
}
transport->profile = apt_string_table_id_find(rtsp_profile_string_table,RTSP_PROFILE_COUNT,&field);
if(transport->profile >= RTSP_PROFILE_COUNT) {
return FALSE;
}
/* read optional lower transport protocol (UDP) */
if(apt_text_field_read(&stream,'/',TRUE,&field) == TRUE) {
transport->lower_protocol = apt_string_table_id_find(rtsp_lower_transport_string_table,RTSP_LOWER_TRANSPORT_COUNT,&field);
if(transport->lower_protocol >= RTSP_LOWER_TRANSPORT_COUNT) {
return FALSE;
}
}
return TRUE;
}
/** Parse MRCP request-line */
static apt_bool_t mrcp_request_line_parse(mrcp_start_line_t *start_line, apt_text_stream_t *stream)
{
apt_str_t field;
if(apt_text_field_read(stream,APT_TOKEN_SP,TRUE,&field) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot parse request-id in request-line");
return FALSE;
}
start_line->request_id = mrcp_request_id_parse(&field);
if(apt_text_field_read(stream,APT_TOKEN_SP,TRUE,&field) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot parse mrcp-version in request-line");
return FALSE;
}
start_line->request_state = mrcp_request_state_parse(&field);
if(start_line->request_state == MRCP_REQUEST_STATE_UNKNOWN) {
/* request-line */
start_line->message_type = MRCP_MESSAGE_TYPE_REQUEST;
}
else {
/* event line */
start_line->message_type = MRCP_MESSAGE_TYPE_EVENT;
if(apt_text_field_read(stream,APT_TOKEN_SP,TRUE,&field) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot parse mrcp-version in request-line");
return FALSE;
}
}
start_line->version = mrcp_version_parse(&field);
if(start_line->version == MRCP_VERSION_UNKNOWN) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Unknown mrcp-version");
return FALSE;
}
return TRUE;
}
/** Parse RTSP transport */
static apt_bool_t rtsp_transport_parse(rtsp_transport_t *transport, const apt_str_t *line, apr_pool_t *pool)
{
apt_str_t field;
apt_text_stream_t stream;
stream.text = *line;
stream.pos = stream.text.buf;
/* read transport protocol (RTP/AVP[/UDP]) */
if(apt_text_field_read(&stream,';',TRUE,&field) == FALSE) {
return FALSE;
}
/* parse transport protocol (RTP/AVP[/UDP]) */
if(rtsp_transport_protocol_parse(transport,&field) == FALSE) {
return FALSE;
}
/* read transport attributes */
while(apt_text_field_read(&stream,';',TRUE,&field) == TRUE) {
rtsp_transport_attrib_parse(transport,&field,pool);
}
return TRUE;
}
/** Parse mrcp request-id list */
static apt_bool_t mrcp_request_id_list_parse(mrcp_request_id_list_t *request_id_list, const apt_str_t *value)
{
apt_str_t field;
apt_text_stream_t stream;
stream.text = *value;
stream.pos = stream.text.buf;
request_id_list->count = 0;
while(request_id_list->count < MAX_ACTIVE_REQUEST_ID_COUNT) {
if(apt_text_field_read(&stream,',',TRUE,&field) == FALSE) {
break;
}
request_id_list->ids[request_id_list->count] = mrcp_request_id_parse(&field);
request_id_list->count++;
}
return TRUE;
}
/** Parse array of name-value pairs */
APT_DECLARE(apt_bool_t) apt_pair_array_parse(apt_pair_arr_t *arr, const apt_str_t *value, apr_pool_t *pool)
{
apt_str_t field;
apt_pair_t *pair;
apt_text_stream_t stream;
if(!arr || !value) {
return FALSE;
}
stream.text = *value;
apt_text_stream_reset(&stream);
/* read name-value pairs */
while(apt_text_field_read(&stream,';',TRUE,&field) == TRUE) {
pair = apr_array_push(arr);
apt_pair_parse(pair,&field,pool);
}
return TRUE;
}
/** Parse MRCP v2 start-line */
static apt_bool_t mrcp_v2_start_line_parse(mrcp_start_line_t *start_line, apt_text_stream_t *stream, apr_pool_t *pool)
{
apt_str_t field;
if(apt_text_field_read(stream,APT_TOKEN_SP,TRUE,&field) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot parse message-length in v2 start-line");
return FALSE;
}
start_line->length = apt_size_value_parse(&field);
if(apt_text_field_read(stream,APT_TOKEN_SP,TRUE,&field) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot parse request-id in v2 start-line");
return FALSE;
}
start_line->request_id = mrcp_request_id_parse(&field);
if(start_line->request_id == 0 && *field.buf != '0') {
/* parsing MRCP v2 request or event */
start_line->message_type = MRCP_MESSAGE_TYPE_REQUEST;
apt_string_copy(&start_line->method_name,&field,pool);
if(apt_text_field_read(stream,APT_TOKEN_SP,TRUE,&field) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot parse request-id in v2 start-line");
return FALSE;
}
start_line->request_id = mrcp_request_id_parse(&field);
if(apt_text_field_read(stream,APT_TOKEN_SP,TRUE,&field) == TRUE) {
/* parsing MRCP v2 event */
start_line->request_state = mrcp_request_state_parse(&field);
start_line->message_type = MRCP_MESSAGE_TYPE_EVENT;
}
}
else {
/* parsing MRCP v2 response */
start_line->message_type = MRCP_MESSAGE_TYPE_RESPONSE;
if(apt_text_field_read(stream,APT_TOKEN_SP,TRUE,&field) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot parse status-code in v2 start-line");
return FALSE;
}
start_line->status_code = mrcp_status_code_parse(&field);
if(apt_text_field_read(stream,APT_TOKEN_SP,TRUE,&field) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot parse request-state in v2 start-line");
return FALSE;
}
start_line->request_state = mrcp_request_state_parse(&field);
}
return TRUE;
}
/** Parse RTSP transport */
static apt_bool_t rtsp_transport_attrib_parse(rtsp_transport_t *transport, const apt_str_t *field, apr_pool_t *pool)
{
rtsp_transport_attrib_e attrib;
apt_str_t name;
apt_text_stream_t stream;
stream.text = *field;
stream.pos = stream.text.buf;
/* read attrib name */
if(apt_text_field_read(&stream,'=',TRUE,&name) == FALSE) {
return FALSE;
}
attrib = apt_string_table_id_find(rtsp_transport_attrib_string_table,RTSP_TRANSPORT_ATTRIB_COUNT,&name);
switch(attrib) {
case RTSP_TRANSPORT_ATTRIB_CLIENT_PORT:
rtsp_port_range_parse(&transport->client_port_range,&stream);
break;
case RTSP_TRANSPORT_ATTRIB_SERVER_PORT:
rtsp_port_range_parse(&transport->client_port_range,&stream);
break;
case RTSP_TRANSPORT_ATTRIB_SOURCE:
rtsp_transport_attrib_value_parse(&transport->source,&stream,pool);
break;
case RTSP_TRANSPORT_ATTRIB_DESTINATION:
rtsp_transport_attrib_value_parse(&transport->destination,&stream,pool);
break;
case RTSP_TRANSPORT_ATTRIB_UNICAST:
transport->delivery = RTSP_DELIVERY_UNICAST;
break;
case RTSP_TRANSPORT_ATTRIB_MULTICAST:
transport->delivery = RTSP_DELIVERY_MULTICAST;
break;
case RTSP_TRANSPORT_ATTRIB_MODE:
rtsp_transport_attrib_value_parse(&transport->mode,&stream,pool);
break;
default:
break;
}
return TRUE;
}
/** Parse MRCP start-line */
MRCP_DECLARE(apt_bool_t) mrcp_start_line_parse(mrcp_start_line_t *start_line, apt_text_stream_t *text_stream, apr_pool_t *pool)
{
apt_text_stream_t line;
apt_str_t field;
apt_bool_t status = TRUE;
start_line->message_type = MRCP_MESSAGE_TYPE_UNKNOWN;
if(apt_text_line_read(text_stream,&line.text) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot parse MRCP start-line");
return FALSE;
}
apt_text_stream_reset(&line);
if(apt_text_field_read(&line,APT_TOKEN_SP,TRUE,&field) == FALSE) {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Cannot read the first field in start-line");
return FALSE;
}
if(field.buf == strstr(field.buf,MRCP_NAME)) {
start_line->version = mrcp_version_parse(&field);
if(start_line->version == MRCP_VERSION_1) {
/* parsing MRCP v1 response */
start_line->message_type = MRCP_MESSAGE_TYPE_RESPONSE;
status = mrcp_response_line_parse(start_line,&line);
}
else if(start_line->version == MRCP_VERSION_2) {
/* parsing MRCP v2 start-line (request/response/event) */
status = mrcp_v2_start_line_parse(start_line,&line,pool);
}
else {
apt_log(APT_LOG_MARK,APT_PRIO_WARNING,"Unknown MRCP version");
return FALSE;
}
}
else {
/* parsing MRCP v1 request or event */
apt_string_copy(&start_line->method_name,&field,pool);
status = mrcp_request_line_parse(start_line,&line);
}
return status;
}