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