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gstavdtpsink.c
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gstavdtpsink.c
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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#include <sys/un.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <pthread.h>
#include <netinet/in.h>
#include <bluetooth/bluetooth.h>
#include <gst/rtp/gstrtpbuffer.h>
#include "ipc.h"
#include "rtp.h"
#include "gstavdtpsink.h"
GST_DEBUG_CATEGORY_STATIC(avdtp_sink_debug);
#define GST_CAT_DEFAULT avdtp_sink_debug
#define BUFFER_SIZE 2048
#define TEMPLATE_MAX_BITPOOL 64
#define CRC_PROTECTED 1
#define CRC_UNPROTECTED 0
#define DEFAULT_AUTOCONNECT TRUE
#define GST_AVDTP_SINK_MUTEX_LOCK(s) G_STMT_START { \
g_mutex_lock(s->sink_lock); \
} G_STMT_END
#define GST_AVDTP_SINK_MUTEX_UNLOCK(s) G_STMT_START { \
g_mutex_unlock(s->sink_lock); \
} G_STMT_END
struct bluetooth_data {
struct bt_get_capabilities_rsp *caps; /* Bluetooth device caps */
guint link_mtu;
gchar buffer[BUFFER_SIZE]; /* Codec transfer buffer */
};
#define IS_SBC(n) (strcmp((n), "audio/x-sbc") == 0)
#define IS_MPEG_AUDIO(n) (strcmp((n), "audio/mpeg") == 0)
enum {
PROP_0,
PROP_DEVICE,
PROP_AUTOCONNECT
};
GST_BOILERPLATE(GstAvdtpSink, gst_avdtp_sink, GstBaseSink,
GST_TYPE_BASE_SINK);
static const GstElementDetails avdtp_sink_details =
GST_ELEMENT_DETAILS("Bluetooth AVDTP sink",
"Sink/Audio",
"Plays audio to an A2DP device",
"Marcel Holtmann <marcel@holtmann.org>");
static GstStaticPadTemplate avdtp_sink_factory =
GST_STATIC_PAD_TEMPLATE("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
GST_STATIC_CAPS("application/x-rtp, "
"media = (string) \"audio\","
"payload = (int) "
GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
"clock-rate = (int) { 16000, 32000, "
"44100, 48000 }, "
"encoding-name = (string) \"SBC\"; "
"application/x-rtp, "
"media = (string) \"audio\", "
"payload = (int) "
GST_RTP_PAYLOAD_MPA_STRING ", "
"clock-rate = (int) 90000; "
"application/x-rtp, "
"media = (string) \"audio\", "
"payload = (int) "
GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
"clock-rate = (int) 90000, "
"encoding-name = (string) \"MPA\""
));
static GIOError gst_avdtp_sink_audioservice_send(GstAvdtpSink *self,
const bt_audio_msg_header_t *msg);
static GIOError gst_avdtp_sink_audioservice_expect(
GstAvdtpSink *self,
bt_audio_msg_header_t *outmsg,
guint8 expected_name);
static void gst_avdtp_sink_base_init(gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS(g_class);
gst_element_class_add_pad_template(element_class,
gst_static_pad_template_get(&avdtp_sink_factory));
gst_element_class_set_details(element_class, &avdtp_sink_details);
}
static gboolean gst_avdtp_sink_stop(GstBaseSink *basesink)
{
GstAvdtpSink *self = GST_AVDTP_SINK(basesink);
GST_INFO_OBJECT(self, "stop");
if (self->watch_id != 0) {
g_source_remove(self->watch_id);
self->watch_id = 0;
}
if (self->server) {
bt_audio_service_close(g_io_channel_unix_get_fd(self->server));
g_io_channel_unref(self->server);
self->server = NULL;
}
if (self->stream) {
g_io_channel_shutdown(self->stream, TRUE, NULL);
g_io_channel_unref(self->stream);
self->stream = NULL;
}
if (self->data) {
g_free(self->data);
self->data = NULL;
}
if (self->stream_caps) {
gst_caps_unref(self->stream_caps);
self->stream_caps = NULL;
}
if (self->dev_caps) {
gst_caps_unref(self->dev_caps);
self->dev_caps = NULL;
}
return TRUE;
}
static void gst_avdtp_sink_finalize(GObject *object)
{
GstAvdtpSink *self = GST_AVDTP_SINK(object);
if (self->data)
gst_avdtp_sink_stop(GST_BASE_SINK(self));
if (self->device)
g_free(self->device);
g_mutex_free(self->sink_lock);
G_OBJECT_CLASS(parent_class)->finalize(object);
}
static void gst_avdtp_sink_set_property(GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec)
{
GstAvdtpSink *sink = GST_AVDTP_SINK(object);
switch (prop_id) {
case PROP_DEVICE:
if (sink->device)
g_free(sink->device);
sink->device = g_value_dup_string(value);
break;
case PROP_AUTOCONNECT:
sink->autoconnect = g_value_get_boolean(value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void gst_avdtp_sink_get_property(GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec)
{
GstAvdtpSink *sink = GST_AVDTP_SINK(object);
switch (prop_id) {
case PROP_DEVICE:
g_value_set_string(value, sink->device);
break;
case PROP_AUTOCONNECT:
g_value_set_boolean(value, sink->autoconnect);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static gint gst_avdtp_sink_bluetooth_recvmsg_fd(GstAvdtpSink *sink)
{
int err, ret;
ret = bt_audio_service_get_data_fd(
g_io_channel_unix_get_fd(sink->server));
if (ret < 0) {
err = errno;
GST_ERROR_OBJECT(sink, "Unable to receive fd: %s (%d)",
strerror(err), err);
return -err;
}
sink->stream = g_io_channel_unix_new(ret);
GST_DEBUG_OBJECT(sink, "stream_fd=%d", ret);
return 0;
}
static codec_capabilities_t *gst_avdtp_find_caps(GstAvdtpSink *sink,
uint8_t codec_type)
{
struct bt_get_capabilities_rsp *rsp = sink->data->caps;
codec_capabilities_t *codec = (void *) rsp->data;
int bytes_left = rsp->h.length - sizeof(*rsp);
while (bytes_left > 0) {
if ((codec->type == codec_type) &&
!(codec->lock & BT_WRITE_LOCK))
break;
bytes_left -= codec->length;
codec = (void *) codec + codec->length;
}
if (bytes_left <= 0)
return NULL;
return codec;
}
static gboolean gst_avdtp_sink_init_sbc_pkt_conf(GstAvdtpSink *sink,
GstCaps *caps,
sbc_capabilities_t *pkt)
{
sbc_capabilities_t *cfg;
const GValue *value = NULL;
const char *pref, *name;
gint rate, subbands, blocks;
GstStructure *structure = gst_caps_get_structure(caps, 0);
cfg = (void *) gst_avdtp_find_caps(sink, BT_A2DP_SBC_SINK);
name = gst_structure_get_name(structure);
if (!(IS_SBC(name))) {
GST_ERROR_OBJECT(sink, "Unexpected format %s, "
"was expecting sbc", name);
return FALSE;
}
value = gst_structure_get_value(structure, "rate");
rate = g_value_get_int(value);
if (rate == 44100)
cfg->frequency = BT_SBC_SAMPLING_FREQ_44100;
else if (rate == 48000)
cfg->frequency = BT_SBC_SAMPLING_FREQ_48000;
else if (rate == 32000)
cfg->frequency = BT_SBC_SAMPLING_FREQ_32000;
else if (rate == 16000)
cfg->frequency = BT_SBC_SAMPLING_FREQ_16000;
else {
GST_ERROR_OBJECT(sink, "Invalid rate while setting caps");
return FALSE;
}
value = gst_structure_get_value(structure, "mode");
pref = g_value_get_string(value);
if (strcmp(pref, "mono") == 0)
cfg->channel_mode = BT_A2DP_CHANNEL_MODE_MONO;
else if (strcmp(pref, "dual") == 0)
cfg->channel_mode = BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL;
else if (strcmp(pref, "stereo") == 0)
cfg->channel_mode = BT_A2DP_CHANNEL_MODE_STEREO;
else if (strcmp(pref, "joint") == 0)
cfg->channel_mode = BT_A2DP_CHANNEL_MODE_JOINT_STEREO;
else {
GST_ERROR_OBJECT(sink, "Invalid mode %s", pref);
return FALSE;
}
value = gst_structure_get_value(structure, "allocation");
pref = g_value_get_string(value);
if (strcmp(pref, "loudness") == 0)
cfg->allocation_method = BT_A2DP_ALLOCATION_LOUDNESS;
else if (strcmp(pref, "snr") == 0)
cfg->allocation_method = BT_A2DP_ALLOCATION_SNR;
else {
GST_ERROR_OBJECT(sink, "Invalid allocation: %s", pref);
return FALSE;
}
value = gst_structure_get_value(structure, "subbands");
subbands = g_value_get_int(value);
if (subbands == 8)
cfg->subbands = BT_A2DP_SUBBANDS_8;
else if (subbands == 4)
cfg->subbands = BT_A2DP_SUBBANDS_4;
else {
GST_ERROR_OBJECT(sink, "Invalid subbands %d", subbands);
return FALSE;
}
value = gst_structure_get_value(structure, "blocks");
blocks = g_value_get_int(value);
if (blocks == 16)
cfg->block_length = BT_A2DP_BLOCK_LENGTH_16;
else if (blocks == 12)
cfg->block_length = BT_A2DP_BLOCK_LENGTH_12;
else if (blocks == 8)
cfg->block_length = BT_A2DP_BLOCK_LENGTH_8;
else if (blocks == 4)
cfg->block_length = BT_A2DP_BLOCK_LENGTH_4;
else {
GST_ERROR_OBJECT(sink, "Invalid blocks %d", blocks);
return FALSE;
}
value = gst_structure_get_value(structure, "bitpool");
cfg->max_bitpool = cfg->min_bitpool = g_value_get_int(value);
memcpy(pkt, cfg, sizeof(*pkt));
return TRUE;
}
static gboolean gst_avdtp_sink_conf_recv_stream_fd(
GstAvdtpSink *self)
{
struct bluetooth_data *data = self->data;
gint ret;
GIOError err;
GError *gerr = NULL;
GIOStatus status;
GIOFlags flags;
gsize read;
ret = gst_avdtp_sink_bluetooth_recvmsg_fd(self);
if (ret < 0)
return FALSE;
if (!self->stream) {
GST_ERROR_OBJECT(self, "Error while configuring device: "
"could not acquire audio socket");
return FALSE;
}
/* set stream socket to nonblock */
GST_LOG_OBJECT(self, "setting stream socket to nonblock");
flags = g_io_channel_get_flags(self->stream);
flags |= G_IO_FLAG_NONBLOCK;
status = g_io_channel_set_flags(self->stream, flags, &gerr);
if (status != G_IO_STATUS_NORMAL) {
if (gerr)
GST_WARNING_OBJECT(self, "Error while "
"setting server socket to nonblock: "
"%s", gerr->message);
else
GST_WARNING_OBJECT(self, "Error while "
"setting server "
"socket to nonblock");
}
/* It is possible there is some outstanding
data in the pipe - we have to empty it */
GST_LOG_OBJECT(self, "emptying stream pipe");
while (1) {
err = g_io_channel_read(self->stream, data->buffer,
(gsize) data->link_mtu,
&read);
if (err != G_IO_ERROR_NONE || read <= 0)
break;
}
/* set stream socket to block */
GST_LOG_OBJECT(self, "setting stream socket to block");
flags = g_io_channel_get_flags(self->stream);
flags &= ~G_IO_FLAG_NONBLOCK;
status = g_io_channel_set_flags(self->stream, flags, &gerr);
if (status != G_IO_STATUS_NORMAL) {
if (gerr)
GST_WARNING_OBJECT(self, "Error while "
"setting server socket to block:"
"%s", gerr->message);
else
GST_WARNING_OBJECT(self, "Error while "
"setting server "
"socket to block");
}
memset(data->buffer, 0, sizeof(data->buffer));
return TRUE;
}
static gboolean server_callback(GIOChannel *chan,
GIOCondition cond, gpointer data)
{
if (cond & G_IO_HUP || cond & G_IO_NVAL)
return FALSE;
else if (cond & G_IO_ERR)
GST_WARNING_OBJECT(GST_AVDTP_SINK(data),
"Untreated callback G_IO_ERR");
return TRUE;
}
static GstStructure *gst_avdtp_sink_parse_sbc_caps(
GstAvdtpSink *self, sbc_capabilities_t *sbc)
{
GstStructure *structure;
GValue *value;
GValue *list;
gboolean mono, stereo;
structure = gst_structure_empty_new("audio/x-sbc");
value = g_value_init(g_new0(GValue, 1), G_TYPE_STRING);
/* mode */
list = g_value_init(g_new0(GValue, 1), GST_TYPE_LIST);
if (sbc->channel_mode & BT_A2DP_CHANNEL_MODE_MONO) {
g_value_set_static_string(value, "mono");
gst_value_list_prepend_value(list, value);
}
if (sbc->channel_mode & BT_A2DP_CHANNEL_MODE_STEREO) {
g_value_set_static_string(value, "stereo");
gst_value_list_prepend_value(list, value);
}
if (sbc->channel_mode & BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL) {
g_value_set_static_string(value, "dual");
gst_value_list_prepend_value(list, value);
}
if (sbc->channel_mode & BT_A2DP_CHANNEL_MODE_JOINT_STEREO) {
g_value_set_static_string(value, "joint");
gst_value_list_prepend_value(list, value);
}
g_value_unset(value);
if (list) {
gst_structure_set_value(structure, "mode", list);
g_free(list);
list = NULL;
}
/* subbands */
list = g_value_init(g_new0(GValue, 1), GST_TYPE_LIST);
value = g_value_init(value, G_TYPE_INT);
if (sbc->subbands & BT_A2DP_SUBBANDS_4) {
g_value_set_int(value, 4);
gst_value_list_prepend_value(list, value);
}
if (sbc->subbands & BT_A2DP_SUBBANDS_8) {
g_value_set_int(value, 8);
gst_value_list_prepend_value(list, value);
}
g_value_unset(value);
if (list) {
gst_structure_set_value(structure, "subbands", list);
g_free(list);
list = NULL;
}
/* blocks */
value = g_value_init(value, G_TYPE_INT);
list = g_value_init(g_new0(GValue, 1), GST_TYPE_LIST);
if (sbc->block_length & BT_A2DP_BLOCK_LENGTH_16) {
g_value_set_int(value, 16);
gst_value_list_prepend_value(list, value);
}
if (sbc->block_length & BT_A2DP_BLOCK_LENGTH_12) {
g_value_set_int(value, 12);
gst_value_list_prepend_value(list, value);
}
if (sbc->block_length & BT_A2DP_BLOCK_LENGTH_8) {
g_value_set_int(value, 8);
gst_value_list_prepend_value(list, value);
}
if (sbc->block_length & BT_A2DP_BLOCK_LENGTH_4) {
g_value_set_int(value, 4);
gst_value_list_prepend_value(list, value);
}
g_value_unset(value);
if (list) {
gst_structure_set_value(structure, "blocks", list);
g_free(list);
list = NULL;
}
/* allocation */
g_value_init(value, G_TYPE_STRING);
list = g_value_init(g_new0(GValue,1), GST_TYPE_LIST);
if (sbc->allocation_method & BT_A2DP_ALLOCATION_LOUDNESS) {
g_value_set_static_string(value, "loudness");
gst_value_list_prepend_value(list, value);
}
if (sbc->allocation_method & BT_A2DP_ALLOCATION_SNR) {
g_value_set_static_string(value, "snr");
gst_value_list_prepend_value(list, value);
}
g_value_unset(value);
if (list) {
gst_structure_set_value(structure, "allocation", list);
g_free(list);
list = NULL;
}
/* rate */
g_value_init(value, G_TYPE_INT);
list = g_value_init(g_new0(GValue, 1), GST_TYPE_LIST);
if (sbc->frequency & BT_SBC_SAMPLING_FREQ_48000) {
g_value_set_int(value, 48000);
gst_value_list_prepend_value(list, value);
}
if (sbc->frequency & BT_SBC_SAMPLING_FREQ_44100) {
g_value_set_int(value, 44100);
gst_value_list_prepend_value(list, value);
}
if (sbc->frequency & BT_SBC_SAMPLING_FREQ_32000) {
g_value_set_int(value, 32000);
gst_value_list_prepend_value(list, value);
}
if (sbc->frequency & BT_SBC_SAMPLING_FREQ_16000) {
g_value_set_int(value, 16000);
gst_value_list_prepend_value(list, value);
}
g_value_unset(value);
if (list) {
gst_structure_set_value(structure, "rate", list);
g_free(list);
list = NULL;
}
/* bitpool */
value = g_value_init(value, GST_TYPE_INT_RANGE);
gst_value_set_int_range(value,
MIN(sbc->min_bitpool, TEMPLATE_MAX_BITPOOL),
MIN(sbc->max_bitpool, TEMPLATE_MAX_BITPOOL));
gst_structure_set_value(structure, "bitpool", value);
g_value_unset(value);
/* channels */
mono = FALSE;
stereo = FALSE;
if (sbc->channel_mode & BT_A2DP_CHANNEL_MODE_MONO)
mono = TRUE;
if ((sbc->channel_mode & BT_A2DP_CHANNEL_MODE_STEREO) ||
(sbc->channel_mode &
BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL) ||
(sbc->channel_mode &
BT_A2DP_CHANNEL_MODE_JOINT_STEREO))
stereo = TRUE;
if (mono && stereo) {
g_value_init(value, GST_TYPE_INT_RANGE);
gst_value_set_int_range(value, 1, 2);
} else {
g_value_init(value, G_TYPE_INT);
if (mono)
g_value_set_int(value, 1);
else if (stereo)
g_value_set_int(value, 2);
else {
GST_ERROR_OBJECT(self,
"Unexpected number of channels");
g_value_set_int(value, 0);
}
}
gst_structure_set_value(structure, "channels", value);
g_free(value);
return structure;
}
static GstStructure *gst_avdtp_sink_parse_mpeg_caps(
GstAvdtpSink *self, mpeg_capabilities_t *mpeg)
{
GstStructure *structure;
GValue *value;
GValue *list;
gboolean valid_layer = FALSE;
gboolean mono, stereo;
if (!mpeg)
return NULL;
GST_LOG_OBJECT(self, "parsing mpeg caps");
structure = gst_structure_empty_new("audio/mpeg");
value = g_new0(GValue, 1);
g_value_init(value, G_TYPE_INT);
list = g_value_init(g_new0(GValue, 1), GST_TYPE_LIST);
g_value_set_int(value, 1);
gst_value_list_prepend_value(list, value);
g_value_set_int(value, 2);
gst_value_list_prepend_value(list, value);
gst_structure_set_value(structure, "mpegversion", list);
g_free(list);
/* layer */
GST_LOG_OBJECT(self, "setting mpeg layer");
list = g_value_init(g_new0(GValue, 1), GST_TYPE_LIST);
if (mpeg->layer & BT_MPEG_LAYER_1) {
g_value_set_int(value, 1);
gst_value_list_prepend_value(list, value);
valid_layer = TRUE;
}
if (mpeg->layer & BT_MPEG_LAYER_2) {
g_value_set_int(value, 2);
gst_value_list_prepend_value(list, value);
valid_layer = TRUE;
}
if (mpeg->layer & BT_MPEG_LAYER_3) {
g_value_set_int(value, 3);
gst_value_list_prepend_value(list, value);
valid_layer = TRUE;
}
if (list) {
gst_structure_set_value(structure, "layer", list);
g_free(list);
list = NULL;
}
if (!valid_layer) {
gst_structure_free(structure);
g_free(value);
return NULL;
}
/* rate */
GST_LOG_OBJECT(self, "setting mpeg rate");
list = g_value_init(g_new0(GValue, 1), GST_TYPE_LIST);
if (mpeg->frequency & BT_MPEG_SAMPLING_FREQ_48000) {
g_value_set_int(value, 48000);
gst_value_list_prepend_value(list, value);
}
if (mpeg->frequency & BT_MPEG_SAMPLING_FREQ_44100) {
g_value_set_int(value, 44100);
gst_value_list_prepend_value(list, value);
}
if (mpeg->frequency & BT_MPEG_SAMPLING_FREQ_32000) {
g_value_set_int(value, 32000);
gst_value_list_prepend_value(list, value);
}
if (mpeg->frequency & BT_MPEG_SAMPLING_FREQ_24000) {
g_value_set_int(value, 24000);
gst_value_list_prepend_value(list, value);
}
if (mpeg->frequency & BT_MPEG_SAMPLING_FREQ_22050) {
g_value_set_int(value, 22050);
gst_value_list_prepend_value(list, value);
}
if (mpeg->frequency & BT_MPEG_SAMPLING_FREQ_16000) {
g_value_set_int(value, 16000);
gst_value_list_prepend_value(list, value);
}
g_value_unset(value);
if (list) {
gst_structure_set_value(structure, "rate", list);
g_free(list);
list = NULL;
}
/* channels */
GST_LOG_OBJECT(self, "setting mpeg channels");
mono = FALSE;
stereo = FALSE;
if (mpeg->channel_mode & BT_A2DP_CHANNEL_MODE_MONO)
mono = TRUE;
if ((mpeg->channel_mode & BT_A2DP_CHANNEL_MODE_STEREO) ||
(mpeg->channel_mode &
BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL) ||
(mpeg->channel_mode &
BT_A2DP_CHANNEL_MODE_JOINT_STEREO))
stereo = TRUE;
if (mono && stereo) {
g_value_init(value, GST_TYPE_INT_RANGE);
gst_value_set_int_range(value, 1, 2);
} else {
g_value_init(value, G_TYPE_INT);
if (mono)
g_value_set_int(value, 1);
else if (stereo)
g_value_set_int(value, 2);
else {
GST_ERROR_OBJECT(self,
"Unexpected number of channels");
g_value_set_int(value, 0);
}
}
gst_structure_set_value(structure, "channels", value);
g_free(value);
return structure;
}
static gboolean gst_avdtp_sink_update_caps(GstAvdtpSink *self)
{
sbc_capabilities_t *sbc;
mpeg_capabilities_t *mpeg;
GstStructure *sbc_structure;
GstStructure *mpeg_structure;
gchar *tmp;
GST_LOG_OBJECT(self, "updating device caps");
sbc = (void *) gst_avdtp_find_caps(self, BT_A2DP_SBC_SINK);
mpeg = (void *) gst_avdtp_find_caps(self, BT_A2DP_MPEG12_SINK);
sbc_structure = gst_avdtp_sink_parse_sbc_caps(self, sbc);
mpeg_structure = gst_avdtp_sink_parse_mpeg_caps(self, mpeg);
if (self->dev_caps != NULL)
gst_caps_unref(self->dev_caps);
self->dev_caps = gst_caps_new_full(sbc_structure, NULL);
if (mpeg_structure != NULL)
gst_caps_append_structure(self->dev_caps, mpeg_structure);
tmp = gst_caps_to_string(self->dev_caps);
GST_DEBUG_OBJECT(self, "Device capabilities: %s", tmp);
g_free(tmp);
return TRUE;
}
static gboolean gst_avdtp_sink_get_capabilities(GstAvdtpSink *self)
{
gchar *buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_get_capabilities_req *req = (void *) buf;
struct bt_get_capabilities_rsp *rsp = (void *) buf;
GIOError io_error;
memset(req, 0, BT_SUGGESTED_BUFFER_SIZE);
req->h.type = BT_REQUEST;
req->h.name = BT_GET_CAPABILITIES;
req->h.length = sizeof(*req);
if (self->device == NULL)
return FALSE;
strncpy(req->destination, self->device, 18);
if (self->autoconnect)
req->flags |= BT_FLAG_AUTOCONNECT;
io_error = gst_avdtp_sink_audioservice_send(self, &req->h);
if (io_error != G_IO_ERROR_NONE) {
GST_ERROR_OBJECT(self, "Error while asking device caps");
return FALSE;
}
rsp->h.length = 0;
io_error = gst_avdtp_sink_audioservice_expect(self,
&rsp->h, BT_GET_CAPABILITIES);
if (io_error != G_IO_ERROR_NONE) {
GST_ERROR_OBJECT(self, "Error while getting device caps");
return FALSE;
}
self->data->caps = g_malloc0(rsp->h.length);
memcpy(self->data->caps, rsp, rsp->h.length);
if (!gst_avdtp_sink_update_caps(self)) {
GST_WARNING_OBJECT(self, "failed to update capabilities");
return FALSE;
}
return TRUE;
}
static gint gst_avdtp_sink_get_channel_mode(const gchar *mode)
{
if (strcmp(mode, "stereo") == 0)
return BT_A2DP_CHANNEL_MODE_STEREO;
else if (strcmp(mode, "joint-stereo") == 0)
return BT_A2DP_CHANNEL_MODE_JOINT_STEREO;
else if (strcmp(mode, "dual-channel") == 0)
return BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL;
else if (strcmp(mode, "mono") == 0)
return BT_A2DP_CHANNEL_MODE_MONO;
else
return -1;
}
static void gst_avdtp_sink_tag(const GstTagList *taglist,
const gchar *tag, gpointer user_data)
{
gboolean crc;
gchar *channel_mode = NULL;
GstAvdtpSink *self = GST_AVDTP_SINK(user_data);
if (strcmp(tag, "has-crc") == 0) {
if (!gst_tag_list_get_boolean(taglist, tag, &crc)) {
GST_WARNING_OBJECT(self, "failed to get crc tag");
return;
}
gst_avdtp_sink_set_crc(self, crc);
} else if (strcmp(tag, "channel-mode") == 0) {
if (!gst_tag_list_get_string(taglist, tag, &channel_mode)) {
GST_WARNING_OBJECT(self,
"failed to get channel-mode tag");
return;
}
self->channel_mode = gst_avdtp_sink_get_channel_mode(
channel_mode);
if (self->channel_mode == -1)
GST_WARNING_OBJECT(self, "Received invalid channel "
"mode: %s", channel_mode);
g_free(channel_mode);
} else
GST_DEBUG_OBJECT(self, "received unused tag: %s", tag);
}
static gboolean gst_avdtp_sink_event(GstBaseSink *basesink,
GstEvent *event)
{
GstAvdtpSink *self = GST_AVDTP_SINK(basesink);
GstTagList *taglist = NULL;
if (GST_EVENT_TYPE(event) == GST_EVENT_TAG) {
/* we check the tags, mp3 has tags that are importants and
* are outside caps */
gst_event_parse_tag(event, &taglist);
gst_tag_list_foreach(taglist, gst_avdtp_sink_tag, self);
}
return TRUE;
}
static gboolean gst_avdtp_sink_start(GstBaseSink *basesink)
{
GstAvdtpSink *self = GST_AVDTP_SINK(basesink);
gint sk;
gint err;
GST_INFO_OBJECT(self, "start");
self->watch_id = 0;
sk = bt_audio_service_open();
if (sk <= 0) {
err = errno;
GST_ERROR_OBJECT(self, "Cannot open connection to bt "
"audio service: %s %d", strerror(err), err);
goto failed;
}
self->server = g_io_channel_unix_new(sk);
self->watch_id = g_io_add_watch(self->server, G_IO_HUP | G_IO_ERR |
G_IO_NVAL, server_callback, self);
self->data = g_new0(struct bluetooth_data, 1);
self->stream = NULL;
self->stream_caps = NULL;
self->mp3_using_crc = -1;
self->channel_mode = -1;
if (!gst_avdtp_sink_get_capabilities(self)) {
GST_ERROR_OBJECT(self, "failed to get capabilities "
"from device");
goto failed;
}
return TRUE;
failed:
bt_audio_service_close(sk);
return FALSE;
}
static gboolean gst_avdtp_sink_stream_start(GstAvdtpSink *self)
{
gchar buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_start_stream_req *req = (void *) buf;
struct bt_start_stream_rsp *rsp = (void *) buf;
struct bt_new_stream_ind *ind = (void *) buf;
GIOError io_error;
memset(req, 0, sizeof(buf));
req->h.type = BT_REQUEST;
req->h.name = BT_START_STREAM;
req->h.length = sizeof(*req);
io_error = gst_avdtp_sink_audioservice_send(self, &req->h);
if (io_error != G_IO_ERROR_NONE) {
GST_ERROR_OBJECT(self, "Error ocurred while sending "
"start packet");
return FALSE;
}
rsp->h.length = sizeof(*rsp);
io_error = gst_avdtp_sink_audioservice_expect(self,
&rsp->h, BT_START_STREAM);
if (io_error != G_IO_ERROR_NONE) {
GST_ERROR_OBJECT(self, "Error while stream "
"start confirmation");
return FALSE;
}
ind->h.length = sizeof(*ind);
io_error = gst_avdtp_sink_audioservice_expect(self, &ind->h,
BT_NEW_STREAM);
if (io_error != G_IO_ERROR_NONE) {
GST_ERROR_OBJECT(self, "Error while receiving "
"stream filedescriptor");
return FALSE;
}
if (!gst_avdtp_sink_conf_recv_stream_fd(self))
return FALSE;
return TRUE;
}
static gboolean gst_avdtp_sink_init_mp3_pkt_conf(
GstAvdtpSink *self, GstCaps *caps,
mpeg_capabilities_t *pkt)
{
const GValue *value = NULL;
gint rate, layer;
const gchar *name;
GstStructure *structure = gst_caps_get_structure(caps, 0);
name = gst_structure_get_name(structure);
if (!(IS_MPEG_AUDIO(name))) {
GST_ERROR_OBJECT(self, "Unexpected format %s, "
"was expecting mp3", name);
return FALSE;
}
/* layer */
value = gst_structure_get_value(structure, "layer");
layer = g_value_get_int(value);
if (layer == 1)
pkt->layer = BT_MPEG_LAYER_1;
else if (layer == 2)
pkt->layer = BT_MPEG_LAYER_2;
else if (layer == 3)
pkt->layer = BT_MPEG_LAYER_3;
else {
GST_ERROR_OBJECT(self, "Unexpected layer: %d", layer);
return FALSE;
}
/* crc */
if (self->mp3_using_crc != -1)
pkt->crc = self->mp3_using_crc;
else {
GST_ERROR_OBJECT(self, "No info about crc was received, "
" can't proceed");
return FALSE;
}
/* channel mode */
if (self->channel_mode != -1)
pkt->channel_mode = self->channel_mode;
else {
GST_ERROR_OBJECT(self, "No info about channel mode "
"received, can't proceed");