parser.c

SDP文件解析代码

			    unsigned int index)
{
  if ((!dsc) || (index >= dsc->a_rtpmaps_count))
    return 0;
  return dsc->a_rtpmaps[index]->clock_rate;
}

const char *
fsdp_get_rtpmap_encoding_parameters (const fsdp_description_t * dsc,
				     unsigned int index)
{
  if ((!dsc) || (index >= dsc->a_rtpmaps_count))
    return NULL;
  return dsc->a_rtpmaps[index]->parameters;
}

const char *
fsdp_get_str_att (const fsdp_description_t * dsc, fsdp_session_str_att_t att)
{
  /*TODO: change these individual attributes with a table, thus
    avoiding this slow switch */
  char *result;

  if (!dsc)
    return NULL;

  switch (att)
  {
  case FSDP_SESSION_STR_ATT_CATEGORY:
    result = dsc->a_category;
    break;
  case FSDP_SESSION_STR_ATT_KEYWORDS:
    result = dsc->a_keywords;
    break;
  case FSDP_SESSION_STR_ATT_TOOL:
    result = dsc->a_tool;
    break;
  case FSDP_SESSION_STR_ATT_CHARSET:
    result = dsc->a_charset;
    break;
  default:
    result = NULL;
  }
  return result;
}

unsigned int
fsdp_get_sdplang_count (const fsdp_description_t * dsc)
{
  if (!dsc)
    return 0;
  return dsc->a_sdplangs_count;
}

const char *
fsdp_get_sdplang (const fsdp_description_t * dsc, unsigned int index)
{
  if ((!dsc) || (index >= dsc->a_sdplangs_count))
    return NULL;
  return dsc->a_sdplangs[index];
}

unsigned int
fsdp_get_lang_count (const fsdp_description_t * dsc)
{
  if (!dsc)
    return 0;
  return dsc->a_langs_count;
}

const char *
fsdp_get_lang (const fsdp_description_t * dsc, unsigned int index)
{
  if ((!dsc) || (index >= dsc->a_langs_count))
    return NULL;
  return dsc->a_langs[index];
}

unsigned int
fsdp_get_control_count (const fsdp_description_t * dsc)
{
  if (!dsc)
    return 0;
  return dsc->a_controls_count;
}

const char *
fsdp_get_control (const fsdp_description_t * dsc, unsigned int index)
{
  if ((!dsc) || (index >= dsc->a_controls_count))
    return NULL;
  return dsc->a_controls[index];
}

const char *
fsdp_get_range (const fsdp_description_t * dsc)
{
  return dsc->a_range;
}

fsdp_sendrecv_mode_t
fsdp_get_sendrecv_mode (const fsdp_description_t * dsc)
{
  if (!dsc)
    return FSDP_SENDRECV_UNDEFINED;
  return dsc->a_sendrecv_mode;
}

fsdp_session_type_t
fsdp_get_session_type (const fsdp_description_t * dsc)
{
  if (!dsc)
    return FSDP_SESSION_TYPE_UNDEFINED;
  return dsc->a_type;
}

unsigned int
fsdp_get_media_count (const fsdp_description_t * dsc)
{
  if (!dsc)
    return 0;
  return dsc->media_announcements_count;
}

const fsdp_media_description_t *
fsdp_get_media (const fsdp_description_t * dsc, unsigned int index)
{
  if ((index >= dsc->media_announcements_count))
    return NULL;
  return dsc->media_announcements[index];
}

fsdp_media_t
fsdp_get_media_type (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return FSDP_MEDIA_UNDEFINED;
  return dsc->media_type;
}

unsigned int
fsdp_get_media_port (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return 0;
  return dsc->port;
}

unsigned int
fsdp_get_media_port_count (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return 0;
  return dsc->port_count;
}

fsdp_transport_protocol_t
fsdp_get_media_transport_protocol (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return FSDP_TP_UNDEFINED;
  return dsc->transport;
}

unsigned int
fsdp_get_media_formats_count (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return 0;
  return dsc->formats_count;
}

const char *
fsdp_get_media_format (const fsdp_media_description_t * dsc,
		       unsigned int index)
{
  if (!dsc && (index < dsc->formats_count))
    return NULL;
  return dsc->formats[index];
}

const char *
fsdp_get_media_title (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return NULL;
  return dsc->i_title;
}

fsdp_network_type_t
fsdp_get_media_network_type (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return FSDP_NETWORK_TYPE_UNDEFINED;
  return dsc->c_network_type;
}

fsdp_address_type_t
fsdp_get_media_address_type (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return FSDP_ADDRESS_TYPE_UNDEFINED;
  return dsc->c_address_type;
}

const char *
fsdp_get_media_address (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return NULL;
  return dsc->c_address.address;
}

unsigned int
fsdp_get_media_address_ttl (const fsdp_media_description_t * mdsc)
{
  if (!mdsc)
    return 0;
  return mdsc->c_address.address_ttl;
}

unsigned int
fsdp_get_media_address_count (const fsdp_media_description_t * mdsc)
{
  if (!mdsc)
    return 0;
  return mdsc->c_address.address_count;
}

fsdp_bw_modifier_type_t
fsdp_get_media_bw_modifier_type (const fsdp_media_description_t * dsc,
				 unsigned int index)
{
  if (!dsc || (index >= dsc->bw_modifiers_count))
    return FSDP_BW_MOD_TYPE_UNDEFINED;
  return dsc->bw_modifiers[index].b_mod_type;
}

const char *
fsdp_get_media_bw_modifier_type_unknown (const fsdp_media_description_t * dsc,
					 unsigned int index)
{
  if (!dsc || (index >= dsc->bw_modifiers_count) ||
      (FSDP_BW_MOD_TYPE_UNKNOWN != dsc->bw_modifiers[index].b_mod_type))
    return NULL;
  return dsc->bw_modifiers[index].b_unknown_bw_modt;
}

unsigned long int
fsdp_get_media_bw_value (const fsdp_media_description_t * dsc,
			 unsigned int index)
{
  if (!dsc || (index >= dsc->bw_modifiers_count))
    return 0;
  return dsc->bw_modifiers[index].b_value;
}

fsdp_encryption_method_t
fsdp_get_media_encryption_method (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return FSDP_ENCRYPTION_METHOD_UNDEFINED;
  return dsc->k_encryption_method;
}

const char *
fsdp_get_media_encryption_content (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return NULL;
  return dsc->k_encryption_content;
}

unsigned int
fsdp_get_media_ptime (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return 0;
  return dsc->a_ptime;
}

unsigned int
fsdp_get_media_maxptime (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return 0;
  return dsc->a_maxptime;
}

unsigned int
fsdp_get_media_rtpmap_count (const fsdp_media_description_t * mdsc)
{
  if (!mdsc)
    return 0;
  return mdsc->a_rtpmaps_count;
}

const char *
fsdp_get_media_rtpmap_payload_type (const fsdp_media_description_t * mdsc,
				    unsigned int index)
{
  if (!mdsc || (index >= mdsc->a_rtpmaps_count))
    return NULL;
  return mdsc->a_rtpmaps[index]->pt;
}

const char *
fsdp_get_media_rtpmap_encoding_name (const fsdp_media_description_t * mdsc,
				     unsigned int index)
{
  if (!mdsc || (index >= mdsc->a_rtpmaps_count))
    return NULL;
  return mdsc->a_rtpmaps[index]->encoding_name;
}

unsigned int
fsdp_get_media_rtpmap_clock_rate (const fsdp_media_description_t * mdsc,
				  unsigned int index)
{
  if (!mdsc || (index >= mdsc->a_rtpmaps_count))
    return 0;
  return mdsc->a_rtpmaps[index]->clock_rate;
}

const char *
fsdp_get_media_rtpmap_encoding_parameters (const fsdp_description_t * mdsc,
					   unsigned int index)
{
  if (!mdsc || (index >= mdsc->a_rtpmaps_count))
    return NULL;
  return mdsc->a_rtpmaps[index]->parameters;
}

unsigned int
fsdp_get_media_sdplang_count (const fsdp_media_description_t * mdsc)
{
  if (!mdsc)
    return 0;
  return mdsc->a_sdplangs_count;
}

const char *
fsdp_get_media_sdplang (const fsdp_media_description_t * mdsc,
			unsigned int index)
{
  if (!mdsc || (index >= mdsc->a_sdplangs_count))
    return NULL;
  return mdsc->a_sdplangs[index];
}

unsigned int
fsdp_get_media_lang_count (const fsdp_media_description_t * mdsc)
{
  if (!mdsc)
    return 0;
  return mdsc->a_langs_count;
}

const char *
fsdp_get_media_lang (const fsdp_media_description_t * mdsc,
		     unsigned int index)
{
  if (!mdsc || (index >= mdsc->a_langs_count))
    return NULL;
  return mdsc->a_langs[index];
}

unsigned int
fsdp_get_media_control_count (const fsdp_media_description_t * mdsc)
{
  if (!mdsc)
    return 0;
  return mdsc->a_controls_count;
}

char *
fsdp_get_media_control (const fsdp_media_description_t * mdsc,
			unsigned int index)
{
  if (!mdsc || (index >= mdsc->a_controls_count))
    return NULL;
  return mdsc->a_controls[index];
}

char *
fsdp_get_media_range (const fsdp_media_description_t * mdsc)
{
  return mdsc->a_range;
}

unsigned int
fsdp_get_media_fmtp_count (const fsdp_media_description_t * mdsc)
{
  if (!mdsc)
    return 0;
  return mdsc->a_fmtps_count;
}

const char *
fsdp_get_media_fmtp (const fsdp_media_description_t * mdsc,
		     unsigned int index)
{
  if (!mdsc || (index >= mdsc->a_fmtps_count))
    return NULL;
  return mdsc->a_fmtps[index];
}

fsdp_orient_t
fsdp_get_media_orient (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return FSDP_ORIENT_UNDEFINED;
  return dsc->a_orient;
}

fsdp_sendrecv_mode_t
fsdp_get_media_sendrecv (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return FSDP_SENDRECV_UNDEFINED;
  return dsc->a_sendrecv_mode;
}

float
fsdp_get_media_framerate (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return 0;
  return dsc->a_framerate;
}

unsigned int
fsdp_get_media_quality (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return 0;
  return dsc->a_quality;
}

unsigned int
fsdp_get_media_rtcp_port (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return 0;
  return dsc->a_rtcp_port;
}

fsdp_network_type_t
fsdp_get_media_rtcp_network_type (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return FSDP_NETWORK_TYPE_UNDEFINED;
  return dsc->a_rtcp_network_type;
}

fsdp_address_type_t
fsdp_get_media_rtcp_address_type (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return FSDP_ADDRESS_TYPE_UNDEFINED;
  return dsc->a_rtcp_address_type;
}

const char *
fsdp_get_media_rtcp_address (const fsdp_media_description_t * dsc)
{
  if (!dsc)
    return NULL;
  return dsc->a_rtcp_address;
}

unsigned int
fsdp_get_media_unidentified_attribute_count (const fsdp_media_description_t
					     * mdsc)
{
  if (!mdsc)
    return 0;
  return mdsc->unidentified_attributes_count;
}

const char *
fsdp_get_media_unidentified_attribute (const fsdp_media_description_t * mdsc,
				       unsigned int index)
{
  if (!mdsc || (index < mdsc->unidentified_attributes_count))
    return NULL;
  return mdsc->unidentified_attributes[index];
}