[pulseaudio-discuss] [RFCv3 30/43] bluetooth: Initialize profiles for BlueZ 5 cards
jprvita at gmail.com
jprvita at gmail.com
Fri Sep 13 16:34:37 PDT 2013
From: João Paulo Rechi Vita <jprvita at openbossa.org>
Initialized the currently active profile, configure and acquire the
transport.
---
src/modules/bluetooth/module-bluez5-device.c | 208 +++++++++++++++++++++++++++
1 file changed, 208 insertions(+)
diff --git a/src/modules/bluetooth/module-bluez5-device.c b/src/modules/bluetooth/module-bluez5-device.c
index 2a260f0..9375be4 100644
--- a/src/modules/bluetooth/module-bluez5-device.c
+++ b/src/modules/bluetooth/module-bluez5-device.c
@@ -24,11 +24,14 @@
#include <config.h>
#endif
+#include <sbc/sbc.h>
+
#include <pulsecore/core-util.h>
#include <pulsecore/i18n.h>
#include <pulsecore/module.h>
#include <pulsecore/modargs.h>
+#include "a2dp-codecs.h"
#include "bluez5-util.h"
#include "module-bluez5-device-symdef.h"
@@ -44,6 +47,18 @@ static const char* const valid_modargs[] = {
NULL
};
+typedef struct sbc_info {
+ sbc_t sbc; /* Codec data */
+ bool sbc_initialized; /* Keep track if the encoder is initialized */
+ size_t codesize, frame_length; /* SBC Codesize, frame_length. We simply cache those values here */
+ uint16_t seq_num; /* Cumulative packet sequence */
+ uint8_t min_bitpool;
+ uint8_t max_bitpool;
+
+ void* buffer; /* Codec transfer buffer */
+ size_t buffer_size; /* Size of the buffer */
+} sbc_info_t;
+
struct userdata {
pa_module *module;
pa_core *core;
@@ -53,11 +68,21 @@ struct userdata {
pa_bluetooth_discovery *discovery;
pa_bluetooth_device *device;
+ pa_bluetooth_transport *transport;
+ bool transport_acquired;
pa_card *card;
pa_bluetooth_profile_t profile;
char *output_port_name;
char *input_port_name;
+
+ int stream_fd;
+ size_t read_link_mtu;
+ size_t write_link_mtu;
+ size_t read_block_size;
+ size_t write_block_size;
+ pa_sample_spec sample_spec;
+ struct sbc_info sbc_info;
};
typedef enum pa_bluetooth_form_factor {
@@ -142,6 +167,176 @@ static const char *form_factor_to_string(pa_bluetooth_form_factor_t ff) {
pa_assert_not_reached();
}
+static int transport_acquire(struct userdata *u, bool optional) {
+ pa_assert(u->transport);
+
+ if (u->transport_acquired)
+ return 0;
+
+ pa_log_debug("Acquiring transport %s", u->transport->path);
+
+ u->stream_fd = u->transport->acquire(u->transport, optional, &u->read_link_mtu, &u->write_link_mtu);
+ if (u->stream_fd < 0)
+ return -1;
+
+ u->transport_acquired = true;
+ pa_log_info("Transport %s acquired: fd %d", u->transport->path, u->stream_fd);
+
+ return 0;
+}
+
+/* Run from main thread */
+static void transport_config(struct userdata *u) {
+ sbc_info_t *sbc_info = &u->sbc_info;
+ a2dp_sbc_t *config;
+
+ pa_assert(u->transport);
+
+ u->sample_spec.format = PA_SAMPLE_S16LE;
+ config = (a2dp_sbc_t *) u->transport->config;
+
+ if (sbc_info->sbc_initialized)
+ sbc_reinit(&sbc_info->sbc, 0);
+ else
+ sbc_init(&sbc_info->sbc, 0);
+ sbc_info->sbc_initialized = true;
+
+ switch (config->frequency) {
+ case SBC_SAMPLING_FREQ_16000:
+ sbc_info->sbc.frequency = SBC_FREQ_16000;
+ u->sample_spec.rate = 16000U;
+ break;
+ case SBC_SAMPLING_FREQ_32000:
+ sbc_info->sbc.frequency = SBC_FREQ_32000;
+ u->sample_spec.rate = 32000U;
+ break;
+ case SBC_SAMPLING_FREQ_44100:
+ sbc_info->sbc.frequency = SBC_FREQ_44100;
+ u->sample_spec.rate = 44100U;
+ break;
+ case SBC_SAMPLING_FREQ_48000:
+ sbc_info->sbc.frequency = SBC_FREQ_48000;
+ u->sample_spec.rate = 48000U;
+ break;
+ default:
+ pa_assert_not_reached();
+ }
+
+ switch (config->channel_mode) {
+ case SBC_CHANNEL_MODE_MONO:
+ sbc_info->sbc.mode = SBC_MODE_MONO;
+ u->sample_spec.channels = 1;
+ break;
+ case SBC_CHANNEL_MODE_DUAL_CHANNEL:
+ sbc_info->sbc.mode = SBC_MODE_DUAL_CHANNEL;
+ u->sample_spec.channels = 2;
+ break;
+ case SBC_CHANNEL_MODE_STEREO:
+ sbc_info->sbc.mode = SBC_MODE_STEREO;
+ u->sample_spec.channels = 2;
+ break;
+ case SBC_CHANNEL_MODE_JOINT_STEREO:
+ sbc_info->sbc.mode = SBC_MODE_JOINT_STEREO;
+ u->sample_spec.channels = 2;
+ break;
+ default:
+ pa_assert_not_reached();
+ }
+
+ switch (config->allocation_method) {
+ case SBC_ALLOCATION_SNR:
+ sbc_info->sbc.allocation = SBC_AM_SNR;
+ break;
+ case SBC_ALLOCATION_LOUDNESS:
+ sbc_info->sbc.allocation = SBC_AM_LOUDNESS;
+ break;
+ default:
+ pa_assert_not_reached();
+ }
+
+ switch (config->subbands) {
+ case SBC_SUBBANDS_4:
+ sbc_info->sbc.subbands = SBC_SB_4;
+ break;
+ case SBC_SUBBANDS_8:
+ sbc_info->sbc.subbands = SBC_SB_8;
+ break;
+ default:
+ pa_assert_not_reached();
+ }
+
+ switch (config->block_length) {
+ case SBC_BLOCK_LENGTH_4:
+ sbc_info->sbc.blocks = SBC_BLK_4;
+ break;
+ case SBC_BLOCK_LENGTH_8:
+ sbc_info->sbc.blocks = SBC_BLK_8;
+ break;
+ case SBC_BLOCK_LENGTH_12:
+ sbc_info->sbc.blocks = SBC_BLK_12;
+ break;
+ case SBC_BLOCK_LENGTH_16:
+ sbc_info->sbc.blocks = SBC_BLK_16;
+ break;
+ default:
+ pa_assert_not_reached();
+ }
+
+ sbc_info->min_bitpool = config->min_bitpool;
+ sbc_info->max_bitpool = config->max_bitpool;
+
+ /* Set minimum bitpool for source to get the maximum possible block_size */
+ sbc_info->sbc.bitpool = u->profile == PA_BLUETOOTH_PROFILE_A2DP_SINK ? sbc_info->max_bitpool : sbc_info->min_bitpool;
+ sbc_info->codesize = sbc_get_codesize(&sbc_info->sbc);
+ sbc_info->frame_length = sbc_get_frame_length(&sbc_info->sbc);
+
+ pa_log_info("SBC parameters: allocation=%u, subbands=%u, blocks=%u, bitpool=%u",
+ sbc_info->sbc.allocation, sbc_info->sbc.subbands, sbc_info->sbc.blocks, sbc_info->sbc.bitpool);
+}
+
+/* Run from main thread */
+static int setup_transport(struct userdata *u) {
+ pa_bluetooth_transport *t;
+
+ pa_assert(u);
+ pa_assert(!u->transport);
+ pa_assert(u->profile != PA_BLUETOOTH_PROFILE_OFF);
+
+ /* check if profile has a transport */
+ t = u->device->transports[u->profile];
+ if (!t || t->state <= PA_BLUETOOTH_TRANSPORT_STATE_DISCONNECTED) {
+ pa_log_warn("Profile has no transport");
+ return -1;
+ }
+
+ u->transport = t;
+
+ if (u->profile == PA_BLUETOOTH_PROFILE_A2DP_SOURCE)
+ transport_acquire(u, true); /* In case of error, the sink/sources will be created suspended */
+ else if (transport_acquire(u, false) < 0)
+ return -1; /* We need to fail here until the interactions with module-suspend-on-idle and alike get improved */
+
+ transport_config(u);
+
+ return 0;
+}
+
+/* Run from main thread */
+static int init_profile(struct userdata *u) {
+ int r = 0;
+ pa_assert(u);
+ pa_assert(u->profile != PA_BLUETOOTH_PROFILE_OFF);
+
+ if (setup_transport(u) < 0)
+ return -1;
+
+ pa_assert(u->transport);
+
+ /* TODO: add sink/source */
+
+ return r;
+}
+
/* Run from main thread */
static char *cleanup_name(const char *name) {
char *t, *s, *d;
@@ -492,6 +687,16 @@ int pa__init(pa_module* m) {
if (add_card(u) < 0)
goto fail;
+ if (u->profile != PA_BLUETOOTH_PROFILE_OFF)
+ if (init_profile(u) < 0)
+ goto off;
+
+ return 0;
+
+off:
+
+ pa_assert_se(pa_card_set_profile(u->card, "off", false) >= 0);
+
return 0;
fail:
@@ -512,6 +717,9 @@ void pa__done(pa_module *m) {
if (u->device_connection_changed_slot)
pa_hook_slot_free(u->device_connection_changed_slot);
+ if (u->sbc_info.sbc_initialized)
+ sbc_finish(&u->sbc_info.sbc);
+
if (u->card)
pa_card_free(u->card);
--
1.8.3.1
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