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/* GStreamer - Remote Audio Access Protocol (RAOP) as used in Apple iTunes to stream music to the Airport Express (ApEx) -
*
* RAOP is based on the Real Time Streaming Protocol (RTSP) but with an extra challenge-response RSA based authentication step.
* This interface accepts RAW PCM data and set it as AES encrypted ALAC while performing emission.
*
* Copyright (C) 2008 Jérémie Bernard [GRemi] <gremimail@gmail.com>
*
* gstapexraop.h
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef __GST_APEXRAOP_H__
#define __GST_APEXRAOP_H__
#include <gst/gst.h>
#include <gst/rtsp/gstrtspdefs.h>
#include <openssl/rand.h>
#include <openssl/rsa.h>
#include <openssl/aes.h>
#include <openssl/evp.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
G_BEGIN_DECLS
/* raop fixed parameters */
#define GST_APEX_RAOP_BITRATE 44100
#define GST_APEX_RAOP_V1_SAMPLES_PER_FRAME 4096
#define GST_APEX_RAOP_V2_SAMPLES_PER_FRAME 352
#define GST_APEX_RAOP_BYTES_PER_CHANNEL 2
#define GST_APEX_RAOP_CHANNELS 2
#define GST_APEX_RAOP_BYTES_PER_SAMPLE (GST_APEX_RAOP_CHANNELS * GST_APEX_RAOP_BYTES_PER_CHANNEL)
/* gst associated caps fields specification */
#define GST_APEX_RAOP_INPUT_TYPE "audio/x-raw-int"
#define GST_APEX_RAOP_INPUT_WIDTH "16"
#define GST_APEX_RAOP_INPUT_DEPTH GST_APEX_RAOP_INPUT_WIDTH
#define GST_APEX_RAOP_INPUT_ENDIAN "LITTLE_ENDIAN"
#define GST_APEX_RAOP_INPUT_CHANNELS "2"
#define GST_APEX_RAOP_INPUT_BIT_RATE "44100"
#define GST_APEX_RAOP_INPUT_SIGNED "TRUE"
typedef enum
{
GST_APEX_JACK_TYPE_UNDEFINED = 0,
GST_APEX_JACK_TYPE_ANALOG,
GST_APEX_JACK_TYPE_DIGITAL,
}
GstApExJackType;
typedef enum
{
GST_APEX_JACK_STATUS_UNDEFINED = 0,
GST_APEX_JACK_STATUS_DISCONNECTED,
GST_APEX_JACK_STATUS_CONNECTED,
}
GstApExJackStatus;
typedef enum
{
GST_APEX_GENERATION_ONE = 1,
GST_APEX_GENERATION_TWO,
}
GstApExGeneration;
typedef enum
{
GST_APEX_TCP = 0,
GST_APEX_UDP,
}
GstApExTransportProtocol;
/* raop context handle */
typedef struct
{
} GstApExRAOP;
/* host might be null and port might be 0 while instanciating */
GstApExRAOP *gst_apexraop_new (const gchar * host,
const guint16 port,
const GstApExGeneration generation,
const GstApExTransportProtocol transport_protocol);
void gst_apexraop_free (GstApExRAOP * conn);
/* must not be connected yet while setting the host target */
void gst_apexraop_set_host (GstApExRAOP * conn, const gchar * host);
gchar *gst_apexraop_get_host (GstApExRAOP * conn);
/* must not be connected yet while setting the port target */
void gst_apexraop_set_port (GstApExRAOP * conn, const guint16 port);
guint16 gst_apexraop_get_port (GstApExRAOP * conn);
/* optional affectation, default iTunes user agent internaly used */
void gst_apexraop_set_useragent (GstApExRAOP * conn, const gchar * useragent);
gchar *gst_apexraop_get_useragent (GstApExRAOP * conn);
/* once allocation and configuration performed, manages the raop ANNOUNCE, SETUP and RECORD sequences,
* open both ctrl and data channels */
GstRTSPStatusCode gst_apexraop_connect (GstApExRAOP * conn);
/* close the currently used session, manages raop TEARDOWN sequence and closes the used sockets */
void gst_apexraop_close (GstApExRAOP * conn);
/* once connected, set the apex target volume, manages SET_PARAMETER sequence */
GstRTSPStatusCode gst_apexraop_set_volume (GstApExRAOP * conn,
const guint volume);
/* write raw samples typed as defined by the fixed raop parameters, flush the apex buffer */
guint gst_apexraop_write (GstApExRAOP * conn, gpointer rawdata, guint length);
GstRTSPStatusCode gst_apexraop_flush (GstApExRAOP * conn);
/* retrieve the connected apex jack type and status */
GstApExJackType gst_apexraop_get_jacktype (GstApExRAOP * conn);
GstApExJackStatus gst_apexraop_get_jackstatus (GstApExRAOP * conn);
/* retrieve the generation */
GstApExGeneration gst_apexraop_get_generation (GstApExRAOP * conn);
/* retrieve the transport protocol */
GstApExTransportProtocol gst_apexraop_get_transport_protocol (GstApExRAOP * conn);
G_END_DECLS
#endif
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