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apexsink: Add support for generation 2 AirTunes hardware

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Fixes bug #649931.
This commit is contained in:
W. Michael Petullo 2011-05-19 08:05:14 +02:00 committed by Sebastian Dröge
parent a570b3d76f
commit 6e4a14d231
4 changed files with 268 additions and 38 deletions
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123
ext/apexsink/gstapexraop.c
View file

@ -52,14 +52,15 @@ const static gchar GST_APEX_RAOP_RSA_PUBLIC_EXP[] = "AQAB";
const static gchar GST_APEX_RAOP_USER_AGENT[] =
"iTunes/4.6 (Macintosh; U; PPC Mac OS X 10.3)";
const static guchar GST_APEX_RAOP_FRAME_HEADER[] = {
const static guchar GST_APEX_RAOP_FRAME_HEADER[] = { // Used by gen. 1
0x24, 0x00, 0x00, 0x00,
0xF0, 0xFF, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00
};
const static int GST_APEX_RAOP_FRAME_HEADER_SIZE = 16;
const static int GST_APEX_RAOP_FRAME_HEADER_SIZE = 16; // Used by gen. 1
const static int GST_APEX_RTP_FRAME_HEADER_SIZE = 12; // Used by gen. 2
const static int GST_APEX_RAOP_ALAC_HEADER_SIZE = 3;
@ -121,6 +122,9 @@ typedef struct
GstApExJackType jack_type; /* APEX connected jack type, once ANNOUNCE performed */
GstApExJackStatus jack_status; /* APEX connected jack status, once ANNOUNCE performed */
GstApExGeneration generation; /* Different devices accept different audio streams */
GstApExTransportProtocol transport_protocol; /* For media stream, not RAOP/RTSP */
gchar *host; /* APEX target ip */
guint ctrl_port; /* APEX target control port */
guint data_port; /* APEX negotiated data port, once SETUP performed */
@ -130,12 +134,18 @@ typedef struct
int data_sd; /* data socket */
struct sockaddr_in data_sd_in;
short rtp_seq_num; /* RTP sequence number, used by gen. 2 */
int rtp_timestamp; /* RTP timestamp, used by gen. 2 */
}
_GstApExRAOP;
/* raop apex struct allocation */
GstApExRAOP *
gst_apexraop_new (const gchar * host, const guint16 port)
gst_apexraop_new (const gchar * host,
const guint16 port,
const GstApExGeneration generation,
const GstApExTransportProtocol transport_protocol)
{
_GstApExRAOP *apexraop;
@ -146,6 +156,10 @@ gst_apexraop_new (const gchar * host, const guint16 port)
apexraop->ua = g_strdup (GST_APEX_RAOP_USER_AGENT);
apexraop->jack_type = GST_APEX_JACK_TYPE_UNDEFINED;
apexraop->jack_status = GST_APEX_JACK_STATUS_DISCONNECTED;
apexraop->generation = generation;
apexraop->transport_protocol = transport_protocol;
apexraop->rtp_seq_num = 0;
apexraop->rtp_timestamp = 0;
return (GstApExRAOP *) apexraop;
}
@ -311,7 +325,9 @@ gst_apexraop_connect (GstApExRAOP * con)
conn->url_abspath,
inaddr,
conn->host,
GST_APEX_RAOP_SAMPLES_PER_FRAME,
conn->generation == GST_APEX_GENERATION_ONE
? GST_APEX_RAOP_V1_SAMPLES_PER_FRAME
: GST_APEX_RAOP_V2_SAMPLES_PER_FRAME,
GST_APEX_RAOP_BYTES_PER_CHANNEL * 8,
GST_APEX_RAOP_CHANNELS, GST_APEX_RAOP_BITRATE, ky, iv);
@ -451,8 +467,14 @@ gst_apexraop_connect (GstApExRAOP * con)
if (res != GST_RTSP_STS_OK)
return res;
if ((conn->data_sd = socket (AF_INET, SOCK_STREAM, 0)) < 0)
return GST_RTSP_STS_DESTINATION_UNREACHABLE;
if (conn->transport_protocol == GST_APEX_TCP) {
if ((conn->data_sd = socket (AF_INET, SOCK_STREAM, 0)) < 0)
return GST_RTSP_STS_DESTINATION_UNREACHABLE;
} else if (conn->transport_protocol == GST_APEX_UDP) {
if ((conn->data_sd = socket (AF_INET, SOCK_DGRAM, 0)) < 0)
return GST_RTSP_STS_DESTINATION_UNREACHABLE;
} else
return GST_RTSP_STS_METHOD_NOT_ALLOWED;
conn->data_sd_in.sin_family = AF_INET;
conn->data_sd_in.sin_port = htons (conn->data_port);
@ -495,6 +517,34 @@ gst_apexraop_get_jackstatus (GstApExRAOP * con)
return conn->jack_status;
}
/* raop apex generation access */
GstApExGeneration
gst_apexraop_get_generation (GstApExRAOP * con)
{
_GstApExRAOP *conn;
conn = (_GstApExRAOP *) con;
if (!conn)
return GST_APEX_GENERATION_ONE;
return conn->generation;
}
/* raop apex transport protocol access */
GstApExTransportProtocol
gst_apexraop_get_transport_protocol (GstApExRAOP * con)
{
_GstApExRAOP *conn;
conn = (_GstApExRAOP *) con;
if (!conn)
return GST_APEX_TCP;
return conn->transport_protocol;
}
/* raop apex sockets close */
void
gst_apexraop_close (GstApExRAOP * con)
@ -628,25 +678,49 @@ gst_apexraop_write (GstApExRAOP * con, gpointer rawdata, guint length)
gushort len;
gint bit_offset, byte_offset, i, out_len, res;
EVP_CIPHER_CTX aes_ctx;
_GstApExRAOP *conn;
conn = (_GstApExRAOP *) con;
_GstApExRAOP *conn = (_GstApExRAOP *) con;
const int frame_header_size = conn->generation == GST_APEX_GENERATION_ONE
? GST_APEX_RAOP_FRAME_HEADER_SIZE : GST_APEX_RTP_FRAME_HEADER_SIZE;
buffer =
(guchar *) g_malloc0 (GST_APEX_RAOP_FRAME_HEADER_SIZE +
(guchar *) g_malloc0 (frame_header_size +
GST_APEX_RAOP_ALAC_HEADER_SIZE + length);
memcpy (buffer, GST_APEX_RAOP_FRAME_HEADER, GST_APEX_RAOP_FRAME_HEADER_SIZE);
if (conn->generation == GST_APEX_GENERATION_ONE) {
g_assert (frame_header_size == GST_APEX_RAOP_FRAME_HEADER_SIZE);
memcpy (buffer, GST_APEX_RAOP_FRAME_HEADER, frame_header_size);
len =
length + GST_APEX_RAOP_FRAME_HEADER_SIZE +
GST_APEX_RAOP_ALAC_HEADER_SIZE - 4;
buffer[2] = len >> 8;
buffer[3] = len & 0xff;
len = length + frame_header_size + GST_APEX_RAOP_ALAC_HEADER_SIZE - 4;
buffer[2] = len >> 8;
buffer[3] = len & 0xff;
} else {
/* Gen. 2 uses RTP-like header (RFC 3550). */
short network_seq_num;
int network_timestamp, unknown_const;
static gboolean first = TRUE;
buffer[0] = 0x80;
if (first) {
buffer[1] = 0xe0;
first = FALSE;
} else
buffer[1] = 0x60;
network_seq_num = htons (conn->rtp_seq_num++);
memcpy (buffer + 2, &network_seq_num, 2);
network_timestamp = htons (conn->rtp_timestamp);
memcpy (buffer + 4, &network_timestamp, 4);
conn->rtp_timestamp += GST_APEX_RAOP_V2_SAMPLES_PER_FRAME;
unknown_const = 0xdeadbeef;
memcpy (buffer + 8, &unknown_const, 4);
}
bit_offset = 0;
byte_offset = 0;
frame_data = buffer + GST_APEX_RAOP_FRAME_HEADER_SIZE;
frame_data = buffer + frame_header_size;
gst_apexraop_write_bits (frame_data, 1, 3, &bit_offset, &byte_offset); /* channels, 0 mono, 1 stereo */
gst_apexraop_write_bits (frame_data, 0, 4, &bit_offset, &byte_offset); /* unknown */
@ -673,16 +747,14 @@ gst_apexraop_write (GstApExRAOP * con, gpointer rawdata, guint length)
res =
gst_apexraop_send (conn->data_sd, buffer,
GST_APEX_RAOP_FRAME_HEADER_SIZE + GST_APEX_RAOP_ALAC_HEADER_SIZE +
length);
frame_header_size + GST_APEX_RAOP_ALAC_HEADER_SIZE + length);
g_free (buffer);
return (guint) ((res >=
(GST_APEX_RAOP_FRAME_HEADER_SIZE +
(frame_header_size +
GST_APEX_RAOP_ALAC_HEADER_SIZE)) ? (res -
GST_APEX_RAOP_FRAME_HEADER_SIZE -
GST_APEX_RAOP_ALAC_HEADER_SIZE) : 0);
frame_header_size - GST_APEX_RAOP_ALAC_HEADER_SIZE) : 0);
}
/* raop apex buffer flush */
@ -701,10 +773,13 @@ gst_apexraop_flush (GstApExRAOP * con)
"Client-Instance: %s\r\n"
"User-Agent: %s\r\n"
"Session: %s\r\n"
"RTP-Info: seq=0;rtptime=0\r\n"
"RTP-Info: seq=%d;rtptime=%d\r\n"
"\r\n",
conn->host,
conn->url_abspath, ++conn->cseq, conn->cid, conn->ua, conn->session);
conn->url_abspath,
++conn->cseq,
conn->cid,
conn->ua, conn->session, conn->rtp_seq_num, conn->rtp_timestamp);
if (gst_apexraop_send (conn->ctrl_sd, hreq, strlen (hreq)) <= 0)
return GST_RTSP_STS_GONE;

28
ext/apexsink/gstapexraop.h
View file

@ -48,7 +48,8 @@ G_BEGIN_DECLS
/* raop fixed parameters */
#define GST_APEX_RAOP_BITRATE 44100
#define GST_APEX_RAOP_SAMPLES_PER_FRAME 4096
#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)
@ -78,13 +79,30 @@ typedef enum
}
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);
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 */
@ -118,6 +136,12 @@ GstRTSPStatusCode gst_apexraop_flush (GstApExRAOP * conn);
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

138
ext/apexsink/gstapexsink.c
View file

@ -59,6 +59,8 @@ enum
APEX_PROP_VOLUME,
APEX_PROP_JACK_TYPE,
APEX_PROP_JACK_STATUS,
APEX_PROP_GENERATION,
APEX_PROP_TRANSPORT_PROTOCOL,
};
#define DEFAULT_APEX_HOST ""
@ -66,6 +68,8 @@ enum
#define DEFAULT_APEX_VOLUME 1.0
#define DEFAULT_APEX_JACK_TYPE GST_APEX_JACK_TYPE_UNDEFINED
#define DEFAULT_APEX_JACK_STATUS GST_APEX_JACK_STATUS_UNDEFINED
#define DEFAULT_APEX_GENERATION GST_APEX_GENERATION_ONE
#define DEFAULT_APEX_TRANSPORT_PROTOCOL GST_APEX_TCP
/* genum apex jack resolution */
GType
@ -108,6 +112,43 @@ gst_apexsink_jacktype_get_type (void)
return jacktype_type;
}
GType
gst_apexsink_generation_get_type (void)
{
static GType generation_type = 0;
static GEnumValue generation[] = {
{GST_APEX_GENERATION_ONE, "generation-one",
"First generation (e.g., original AirPort Express)"},
{GST_APEX_GENERATION_TWO, "generation-two",
"Second generation (e.g., Apple TV v2)"},
{0, NULL, NULL},
};
if (!generation_type) {
generation_type = g_enum_register_static ("GstApExGeneration", generation);
}
return generation_type;
}
GType
gst_apexsink_transport_protocol_get_type (void)
{
static GType transport_protocol_type = 0;
static GEnumValue transport_protocol[] = {
{GST_APEX_TCP, "tcp", "TCP"},
{GST_APEX_UDP, "udp", "UDP"},
{0, NULL, NULL},
};
if (!transport_protocol_type) {
transport_protocol_type =
g_enum_register_static ("GstApExTransportProtocol", transport_protocol);
}
return transport_protocol_type;
}
static void gst_apexsink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
@ -124,6 +165,8 @@ static gboolean gst_apexsink_unprepare (GstAudioSink * asink);
static guint gst_apexsink_delay (GstAudioSink * asink);
static void gst_apexsink_reset (GstAudioSink * asink);
static gboolean gst_apexsink_close (GstAudioSink * asink);
static GstStateChangeReturn gst_apexsink_change_state (GstElement * element,
GstStateChange transition);
/* mixer interface standard api */
static void gst_apexsink_interfaces_init (GType type);
@ -252,6 +295,9 @@ gst_apexsink_class_init (GstApExSinkClass * klass)
((GstAudioSinkClass *) klass)->reset = GST_DEBUG_FUNCPTR (gst_apexsink_reset);
((GstAudioSinkClass *) klass)->close = GST_DEBUG_FUNCPTR (gst_apexsink_close);
((GstElementClass *) klass)->change_state =
GST_DEBUG_FUNCPTR (gst_apexsink_change_state);
g_object_class_install_property ((GObjectClass *) klass, APEX_PROP_HOST,
g_param_spec_string ("host", "Host", "AirPort Express target host",
DEFAULT_APEX_HOST, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
@ -275,6 +321,17 @@ gst_apexsink_class_init (GstApExSinkClass * klass)
"AirPort Express jack connection status",
GST_APEX_SINK_JACKSTATUS_TYPE, DEFAULT_APEX_JACK_STATUS,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property ((GObjectClass *) klass,
APEX_PROP_GENERATION, g_param_spec_enum ("generation", "Generation",
"AirPort device generation",
GST_APEX_SINK_GENERATION_TYPE, DEFAULT_APEX_GENERATION,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property ((GObjectClass *) klass,
APEX_PROP_TRANSPORT_PROTOCOL, g_param_spec_enum ("transport-protocol",
"Transport Protocol", "AirPort transport protocol",
GST_APEX_SINK_TRANSPORT_PROTOCOL_TYPE,
DEFAULT_APEX_TRANSPORT_PROTOCOL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
/* sink plugin instance init */
@ -295,6 +352,8 @@ gst_apexsink_init (GstApExSink * apexsink, GstApExSinkClass * g_class)
apexsink->volume = CLAMP (DEFAULT_APEX_VOLUME * 75, 0, 100);
apexsink->gst_apexraop = NULL;
apexsink->tracks = g_list_append (apexsink->tracks, track);
apexsink->clock = gst_system_clock_obtain ();
apexsink->clock_id = NULL;
GST_INFO_OBJECT (apexsink,
"ApEx sink default initialization, target=\"%s\", port=\"%d\", volume=\"%d%%\"",
@ -343,6 +402,28 @@ gst_apexsink_set_property (GObject * object, guint prop_id,
GST_INFO_OBJECT (sink, "ApEx volume set to \"%d%%\"", sink->volume);
break;
}
case APEX_PROP_GENERATION:
if (sink->gst_apexraop == NULL) {
sink->generation = g_value_get_enum (value);
GST_INFO_OBJECT (sink, "ApEx generation set to \"%d\"",
sink->generation);
} else {
GST_WARNING_OBJECT (sink,
"SET-PROPERTY : generation property may not be set when apexsink opened !");
}
break;
case APEX_PROP_TRANSPORT_PROTOCOL:
if (sink->gst_apexraop == NULL) {
sink->transport_protocol = g_value_get_enum (value);
GST_INFO_OBJECT (sink, "ApEx transport protocol set to \"%d\"",
sink->transport_protocol);
} else {
GST_WARNING_OBJECT (sink,
"SET-PROPERTY : transport protocol property may not be set when apexsink opened !");
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -373,6 +454,14 @@ gst_apexsink_get_property (GObject * object, guint prop_id, GValue * value,
g_value_set_enum (value,
gst_apexraop_get_jackstatus (sink->gst_apexraop));
break;
case APEX_PROP_GENERATION:
g_value_set_enum (value,
gst_apexraop_get_generation (sink->gst_apexraop));
break;
case APEX_PROP_TRANSPORT_PROTOCOL:
g_value_set_enum (value,
gst_apexraop_get_transport_protocol (sink->gst_apexraop));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -391,6 +480,8 @@ gst_apexsink_finalise (GObject * object)
sink->tracks = NULL;
}
gst_object_unref (sink->clock);
g_free (sink->host);
G_OBJECT_CLASS (parent_class)->finalize (object);
@ -403,7 +494,8 @@ gst_apexsink_open (GstAudioSink * asink)
int res;
GstApExSink *apexsink = (GstApExSink *) asink;
apexsink->gst_apexraop = gst_apexraop_new (apexsink->host, apexsink->port);
apexsink->gst_apexraop = gst_apexraop_new (apexsink->host,
apexsink->port, apexsink->generation, apexsink->transport_protocol);
if ((res = gst_apexraop_connect (apexsink->gst_apexraop)) != GST_RTSP_STS_OK) {
GST_ERROR_OBJECT (apexsink,
@ -460,12 +552,14 @@ static gboolean
gst_apexsink_prepare (GstAudioSink * asink, GstRingBufferSpec * spec)
{
GstApExSink *apexsink = (GstApExSink *) asink;
GstApExGeneration gen = gst_apexraop_get_generation (apexsink->gst_apexraop);
apexsink->latency_time = spec->latency_time;
spec->segsize =
GST_APEX_RAOP_SAMPLES_PER_FRAME * GST_APEX_RAOP_BYTES_PER_SAMPLE;
spec->segtotal = 1;
spec->segsize = gen == GST_APEX_GENERATION_ONE
? GST_APEX_RAOP_V1_SAMPLES_PER_FRAME * GST_APEX_RAOP_BYTES_PER_SAMPLE
: GST_APEX_RAOP_V2_SAMPLES_PER_FRAME * GST_APEX_RAOP_BYTES_PER_SAMPLE;
spec->segtotal = 2;
memset (spec->silence_sample, 0, sizeof (spec->silence_sample));
@ -481,17 +575,28 @@ gst_apexsink_prepare (GstAudioSink * asink, GstRingBufferSpec * spec)
static guint
gst_apexsink_write (GstAudioSink * asink, gpointer data, guint length)
{
guint written;
GstApExSink *apexsink = (GstApExSink *) asink;
if (gst_apexraop_write (apexsink->gst_apexraop, data, length) != length) {
if ((written =
gst_apexraop_write (apexsink->gst_apexraop, data,
length)) != length) {
GST_INFO_OBJECT (apexsink,
"WRITE : %d bytes not fully sended, skipping frame samples...", length);
"WRITE : %d of %d bytes sent, skipping frame samples...", written,
length);
} else {
GST_INFO_OBJECT (apexsink, "WRITE : %d bytes sent", length);
/* FIXME, sleeping is ugly and not interruptible */
usleep ((gulong) ((length * 1000000.) / (GST_APEX_RAOP_BITRATE *
GST_APEX_RAOP_BYTES_PER_SAMPLE) - apexsink->latency_time));
/* NOTE, previous calculation subtracted apexsink->latency_time from this;
* however, the value below is less than apexsink->latency_time for generation 2.
* In this case, the number went negative (actualy wrapped around into a big number).
*/
apexsink->clock_id = gst_clock_new_single_shot_id (apexsink->clock,
(GstClockTime) (gst_clock_get_time (apexsink->clock) +
((length * 1000000000.)
/ (GST_APEX_RAOP_BITRATE * GST_APEX_RAOP_BYTES_PER_SAMPLE))));
gst_clock_id_wait (apexsink->clock_id, NULL);
gst_clock_id_unref (apexsink->clock_id);
apexsink->clock_id = NULL;
}
return length;
@ -545,3 +650,16 @@ gst_apexsink_close (GstAudioSink * asink)
return TRUE;
}
static GstStateChangeReturn
gst_apexsink_change_state (GstElement * element, GstStateChange transition)
{
GstApExSink *apexsink = (GstApExSink *) element;
if (apexsink->clock_id && transition == GST_STATE_CHANGE_PAUSED_TO_READY) {
gst_clock_id_unschedule (apexsink->clock_id);
gst_clock_id_unref (apexsink->clock_id);
apexsink->clock_id = NULL;
}
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
}

17
ext/apexsink/gstapexsink.h
View file

@ -46,6 +46,8 @@ G_BEGIN_DECLS
#define GST_APEX_SINK_NAME "apexsink"
#define GST_APEX_SINK_JACKTYPE_TYPE (gst_apexsink_jacktype_get_type())
#define GST_APEX_SINK_JACKSTATUS_TYPE (gst_apexsink_jackstatus_get_type())
#define GST_APEX_SINK_GENERATION_TYPE (gst_apexsink_generation_get_type())
#define GST_APEX_SINK_TRANSPORT_PROTOCOL_TYPE (gst_apexsink_transport_protocol_get_type())
/* ApEx classes declaration */
typedef struct _GstApExSink GstApExSink;
typedef struct _GstApExSinkClass GstApExSinkClass;
@ -59,10 +61,19 @@ struct _GstApExSink
gchar *host;
guint port;
guint volume;
GstApExGeneration generation;
GstApExTransportProtocol transport_protocol;
/* private attributes : latency time local copy, tracks list of the mixer interface */
/* private attributes :
* latency time local copy
* tracks list of the mixer interface
* clock for sleeping
* clock ID for sleeping / canceling sleep
*/
guint64 latency_time;
GList *tracks;
GstClock *clock;
GstClockID clock_id;
/* private apex client */
GstApExRAOP *gst_apexraop;
@ -73,9 +84,11 @@ struct _GstApExSinkClass
GstAudioSinkClass parent_class;
};
/* genum jack access */
/* genums */
GType gst_apexsink_jackstatus_get_type (void);
GType gst_apexsink_jacktype_get_type (void);
GType gst_apexsink_generation_get_type (void);
GType gst_apexsink_transport_protocol_get_type (void);
/* audio sink standard api */
GType gst_apexsink_get_type (void);