Merge commit 'd34f05cb6e67e28a4955332173950466edf0be3e' into audio-hal.lnx.5.1

Change-Id: I4656a1a78c2b1d4b4834b2fd538699f96e2aa90e
diff --git a/hal/audio_extn/a2dp.c b/hal/audio_extn/a2dp.c
index c5edd42..e986a54 100644
--- a/hal/audio_extn/a2dp.c
+++ b/hal/audio_extn/a2dp.c
@@ -50,15 +50,18 @@
 
 #ifdef SPLIT_A2DP_ENABLED
 #define AUDIO_PARAMETER_A2DP_STARTED "A2dpStarted"
-#define BT_IPC_LIB_NAME  "libbthost_if.so"
-#define ENC_MEDIA_FMT_NONE                                     0
-#define ENC_MEDIA_FMT_AAC                                  0x00010DA6
-#define ENC_MEDIA_FMT_APTX                                 0x000131ff
-#define ENC_MEDIA_FMT_APTX_HD                              0x00013200
-#define ENC_MEDIA_FMT_APTX_AD                              0x00013204
-#define ENC_MEDIA_FMT_SBC                                  0x00010BF2
-#define ENC_MEDIA_FMT_CELT                                 0x00013221
-#define ENC_MEDIA_FMT_LDAC                                 0x00013224
+#define BT_IPC_SOURCE_LIB_NAME  "libbthost_if.so"
+#define BT_IPC_SINK_LIB_NAME    "libbthost_if_sink.so"
+#define MEDIA_FMT_NONE                                     0
+#define MEDIA_FMT_AAC                                      0x00010DA6
+#define MEDIA_FMT_APTX                                     0x000131ff
+#define MEDIA_FMT_APTX_HD                                  0x00013200
+#define MEDIA_FMT_APTX_AD                                  0x00013204
+#define MEDIA_FMT_SBC                                      0x00010BF2
+#define MEDIA_FMT_CELT                                     0x00013221
+#define MEDIA_FMT_LDAC                                     0x00013224
+#define MEDIA_FMT_MP3                                      0x00010BE9
+#define MEDIA_FMT_APTX_ADAPTIVE                            0x00013204
 #define MEDIA_FMT_AAC_AOT_LC                               2
 #define MEDIA_FMT_AAC_AOT_SBR                              5
 #define MEDIA_FMT_AAC_AOT_PS                               29
@@ -71,16 +74,20 @@
 #define MEDIA_FMT_SBC_CHANNEL_MODE_JOINT_STEREO            9
 #define MEDIA_FMT_SBC_ALLOCATION_METHOD_LOUDNESS           0
 #define MEDIA_FMT_SBC_ALLOCATION_METHOD_SNR                1
-#define MIXER_ENC_CONFIG_BLOCK     "SLIM_7_RX Encoder Config"
-#define MIXER_DEC_CONFIG_BLOCK     "SLIM_7_TX Decoder Config"
+#define MIXER_ENC_CONFIG_BLOCK            "SLIM_7_RX Encoder Config"
+#define MIXER_SOURCE_DEC_CONFIG_BLOCK     "SLIM_7_TX Decoder Config"
+#define MIXER_SINK_DEC_CONFIG_BLOCK       "SLIM_9_TX Decoder Config"
 #define MIXER_ENC_BIT_FORMAT       "AFE Input Bit Format"
+#define MIXER_DEC_BIT_FORMAT       "AFE Output Bit Format"
 #define MIXER_SCRAMBLER_MODE       "AFE Scrambler Mode"
 #define MIXER_SAMPLE_RATE_RX       "BT SampleRate RX"
-#define MIXER_SAMPLE_RATE_TX       "BT SampleRate TX"
+#define MIXER_SOURCE_SAMPLE_RATE_TX       "BT SampleRate TX"
 #define MIXER_SAMPLE_RATE_DEFAULT  "BT SampleRate"
 #define MIXER_AFE_IN_CHANNELS      "AFE Input Channels"
 #define MIXER_ABR_TX_FEEDBACK_PATH "A2DP_SLIM7_UL_HL Switch"
 #define MIXER_SET_FEEDBACK_CHANNEL "BT set feedback channel"
+#define MIXER_SINK_SAMPLE_RATE     "BT_TX SampleRate"
+#define MIXER_AFE_SINK_CHANNELS    "AFE Output Channels"
 #define MIXER_ENC_FMT_SBC          "SBC"
 #define MIXER_ENC_FMT_AAC          "AAC"
 #define MIXER_ENC_FMT_APTX         "APTX"
@@ -118,25 +125,28 @@
 #define SAMPLING_RATE_441K              44100
 #define CH_STEREO                       2
 #define CH_MONO                         1
+#define SOURCE 0
+#define SINK   1
+
 /*
  * Below enum values are extended from audio_base.h to
- * to keep encoder codec type local to bthost_ipc
+ * to keep encoder and decoder type local to bthost_ipc
  * and audio_hal as these are intended only for handshake
  * between IPC lib and Audio HAL.
  */
 typedef enum {
-    ENC_CODEC_TYPE_INVALID = AUDIO_FORMAT_INVALID, // 0xFFFFFFFFUL
-    ENC_CODEC_TYPE_AAC = AUDIO_FORMAT_AAC, // 0x04000000UL
-    ENC_CODEC_TYPE_SBC = AUDIO_FORMAT_SBC, // 0x1F000000UL
-    ENC_CODEC_TYPE_APTX = AUDIO_FORMAT_APTX, // 0x20000000UL
-    ENC_CODEC_TYPE_APTX_HD = AUDIO_FORMAT_APTX_HD, // 0x21000000UL
+    CODEC_TYPE_INVALID = AUDIO_FORMAT_INVALID, // 0xFFFFFFFFUL
+    CODEC_TYPE_AAC = AUDIO_FORMAT_AAC, // 0x04000000UL
+    CODEC_TYPE_SBC = AUDIO_FORMAT_SBC, // 0x1F000000UL
+    CODEC_TYPE_APTX = AUDIO_FORMAT_APTX, // 0x20000000UL
+    CODEC_TYPE_APTX_HD = AUDIO_FORMAT_APTX_HD, // 0x21000000UL
 #ifndef LINUX_ENABLED
-    ENC_CODEC_TYPE_APTX_DUAL_MONO = 570425344u, // 0x22000000UL
+    CODEC_TYPE_APTX_DUAL_MONO = 570425344u, // 0x22000000UL
 #endif
-    ENC_CODEC_TYPE_LDAC = AUDIO_FORMAT_LDAC, // 0x23000000UL
-    ENC_CODEC_TYPE_CELT = 603979776u, // 0x24000000UL
-    ENC_CODEC_TYPE_APTX_AD = 620756992u, // 0x25000000UL
-}enc_codec_t;
+    CODEC_TYPE_LDAC = AUDIO_FORMAT_LDAC, // 0x23000000UL
+    CODEC_TYPE_CELT = 603979776u, // 0x24000000UL
+    CODEC_TYPE_APTX_AD = 620756992u, // 0x25000000UL
+}codec_t;
 
 /*
  * enums which describes the APTX Adaptive
@@ -162,19 +172,24 @@
     APTX_AD_44_1 = 0x2, // 44.1kHz
 } enc_aptx_ad_s_rate;
 
-typedef int (*audio_stream_open_t)(void);
-typedef int (*audio_stream_close_t)(void);
-typedef int (*audio_start_stream_t)(void);
-typedef int (*audio_stop_stream_t)(void);
-typedef int (*audio_suspend_stream_t)(void);
-typedef void (*audio_handoff_triggered_t)(void);
-typedef void (*clear_a2dpsuspend_flag_t)(void);
-typedef void * (*audio_get_codec_config_t)(uint8_t *multicast_status,uint8_t *num_dev,
-                               enc_codec_t *codec_type);
-typedef int (*audio_check_a2dp_ready_t)(void);
-typedef uint16_t (*audio_get_a2dp_sink_latency_t)(void);
-typedef int (*audio_is_scrambling_enabled_t)(void);
+typedef int (*audio_source_open_t)(void);
+typedef int (*audio_source_close_t)(void);
+typedef int (*audio_source_start_t)(void);
+typedef int (*audio_source_stop_t)(void);
+typedef int (*audio_source_suspend_t)(void);
+typedef void (*audio_source_handoff_triggered_t)(void);
+typedef void (*clear_source_a2dpsuspend_flag_t)(void);
+typedef void * (*audio_get_enc_config_t)(uint8_t *multicast_status,
+                                uint8_t *num_dev, codec_t *codec_type);
+typedef int (*audio_source_check_a2dp_ready_t)(void);
+typedef int (*audio_is_source_scrambling_enabled_t)(void);
 typedef bool (*audio_is_tws_mono_mode_enable_t)(void);
+typedef int (*audio_sink_start_t)(void);
+typedef int (*audio_sink_stop_t)(void);
+typedef void * (*audio_get_dec_config_t)(codec_t *codec_type);
+typedef void * (*audio_sink_session_setup_complete_t)(uint64_t system_latency);
+typedef int (*audio_sink_check_a2dp_ready_t)(void);
+typedef uint16_t (*audio_sink_get_a2dp_latency_t)(void);
 
 enum A2DP_STATE {
     A2DP_STATE_CONNECTED,
@@ -230,26 +245,25 @@
  */
 struct a2dp_data {
     struct audio_device *adev;
-    void *bt_lib_handle;
-    audio_stream_open_t audio_stream_open;
-    audio_stream_close_t audio_stream_close;
-    audio_start_stream_t audio_start_stream;
-    audio_stop_stream_t audio_stop_stream;
-    audio_suspend_stream_t audio_suspend_stream;
-    audio_handoff_triggered_t audio_handoff_triggered;
-    clear_a2dpsuspend_flag_t clear_a2dpsuspend_flag;
-    audio_get_codec_config_t audio_get_codec_config;
-    audio_check_a2dp_ready_t audio_check_a2dp_ready;
-    audio_get_a2dp_sink_latency_t audio_get_a2dp_sink_latency;
-    audio_is_scrambling_enabled_t audio_is_scrambling_enabled;
+    void *bt_lib_source_handle;
+    audio_source_open_t audio_source_open;
+    audio_source_close_t audio_source_close;
+    audio_source_start_t audio_source_start;
+    audio_source_stop_t audio_source_stop;
+    audio_source_suspend_t audio_source_suspend;
+    audio_source_handoff_triggered_t audio_source_handoff_triggered;
+    clear_source_a2dpsuspend_flag_t clear_source_a2dpsuspend_flag;
+    audio_get_enc_config_t audio_get_enc_config;
+    audio_source_check_a2dp_ready_t audio_source_check_a2dp_ready;
     audio_is_tws_mono_mode_enable_t audio_is_tws_mono_mode_enable;
-    enum A2DP_STATE bt_state;
-    enc_codec_t bt_encoder_format;
+    audio_is_source_scrambling_enabled_t audio_is_source_scrambling_enabled;
+    enum A2DP_STATE bt_state_source;
+    codec_t bt_encoder_format;
     uint32_t enc_sampling_rate;
     uint32_t enc_channels;
-    bool a2dp_started;
-    bool a2dp_suspended;
-    int  a2dp_total_active_session_request;
+    bool a2dp_source_started;
+    bool a2dp_source_suspended;
+    int  a2dp_source_total_active_session_requests;
     bool is_a2dp_offload_supported;
     bool is_handoff_in_progress;
     bool is_aptx_dual_mono_supported;
@@ -258,6 +272,20 @@
     bool is_aptx_adaptive;
     /* Adaptive bitrate config for A2DP codecs */
     struct a2dp_abr_config abr_config;
+
+    void *bt_lib_sink_handle;
+    audio_sink_start_t audio_sink_start;
+    audio_sink_stop_t audio_sink_stop;
+    audio_get_dec_config_t audio_get_dec_config;
+    audio_sink_session_setup_complete_t audio_sink_session_setup_complete;
+    audio_sink_check_a2dp_ready_t audio_sink_check_a2dp_ready;
+    audio_sink_get_a2dp_latency_t audio_sink_get_a2dp_latency;
+    enum A2DP_STATE bt_state_sink;
+    codec_t bt_decoder_format;
+    uint32_t dec_sampling_rate;
+    uint32_t dec_channels;
+    bool a2dp_sink_started;
+    int  a2dp_sink_total_active_session_requests;
 };
 
 struct a2dp_data a2dp;
@@ -364,6 +392,37 @@
     struct aac_frame_size_control_t frame_ctl;
 } __attribute__ ((packed));
 
+typedef struct audio_aac_decoder_config_t audio_aac_decoder_config_t;
+struct audio_aac_decoder_config_t {
+    uint16_t      aac_fmt_flag; /* LATM*/
+    uint16_t      audio_object_type; /* LC */
+    uint16_t      channels; /* Stereo */
+    uint16_t      total_size_of_pce_bits; /* 0 - only for channel conf PCE */
+    uint32_t      sampling_rate; /* 8k, 11.025k, 12k, 16k, 22.05k, 24k, 32k,
+                                  44.1k, 48k, 64k, 88.2k, 96k */
+} __attribute__ ((packed));
+
+typedef struct audio_sbc_decoder_config_t audio_sbc_decoder_config_t;
+struct audio_sbc_decoder_config_t {
+    uint16_t      channels; /* Mono, Stereo */
+    uint32_t      sampling_rate; /* 8k, 11.025k, 12k, 16k, 22.05k, 24k, 32k,
+                                  44.1k, 48k, 64k, 88.2k, 96k */
+} __attribute__ ((packed));
+
+/* AAC decoder configuration structure. */
+typedef struct aac_dec_cfg_t aac_dec_cfg_t;
+struct aac_dec_cfg_t {
+    uint32_t dec_format;
+    audio_aac_decoder_config_t data;
+} __attribute__ ((packed));
+
+/* SBC decoder configuration structure. */
+typedef struct sbc_dec_cfg_t sbc_dec_cfg_t;
+struct sbc_dec_cfg_t {
+    uint32_t dec_format;
+    audio_sbc_decoder_config_t data;
+} __attribute__ ((packed));
+
 /* SBC encoder configuration structure. */
 typedef struct sbc_enc_cfg_t sbc_enc_cfg_t;
 
@@ -581,6 +640,29 @@
     uint32_t bits_per_sample;
 } audio_ldac_encoder_config;
 
+/* Information about BT AAC decoder configuration
+ * This data is used between audio HAL module and
+ * BT IPC library to configure DSP decoder
+ */
+typedef struct {
+    uint16_t      aac_fmt_flag; /* LATM*/
+    uint16_t      audio_object_type; /* LC */
+    uint16_t      channels; /* Stereo */
+    uint16_t      total_size_of_pce_bits; /* 0 - only for channel conf PCE */
+    uint32_t      sampling_rate; /* 8k, 11.025k, 12k, 16k, 22.05k, 24k, 32k,
+                                  44.1k, 48k, 64k, 88.2k, 96k */
+} audio_aac_dec_config_t;
+
+/* Information about BT SBC decoder configuration
+ * This data is used between audio HAL module and
+ * BT IPC library to configure DSP decoder
+ */
+typedef struct {
+    uint16_t      channels; /* Mono, Stereo */
+    uint32_t      sampling_rate; /* 8k, 11.025k, 12k, 16k, 22.05k, 24k, 32k,
+                                  44.1k, 48k, 64k, 88.2k, 96k */
+}audio_sbc_dec_config_t;
+
 /*********** END of DSP configurable structures ********************/
 
 /* API to identify DSP encoder captabilities */
@@ -750,98 +832,150 @@
     return -ENOSYS;
 }
 
-/* API to open BT IPC library to start IPC communication */
-static void open_a2dp_output()
+/* API to open BT IPC library to start IPC communication for BT Source*/
+static void open_a2dp_source()
 {
     int ret = 0;
 
-    ALOGD(" Open A2DP output start ");
-    if (a2dp.bt_lib_handle == NULL){
+    ALOGD(" Open A2DP source start ");
+    if (a2dp.bt_lib_source_handle == NULL){
         ALOGD(" Requesting for BT lib handle");
-        a2dp.bt_lib_handle = dlopen(BT_IPC_LIB_NAME, RTLD_NOW);
+        a2dp.bt_lib_source_handle = dlopen(BT_IPC_SOURCE_LIB_NAME, RTLD_NOW);
 
-        if (a2dp.bt_lib_handle == NULL) {
-            ALOGE("%s: DLOPEN failed for %s", __func__, BT_IPC_LIB_NAME);
+        if (a2dp.bt_lib_source_handle == NULL) {
+            ALOGE("%s: DLOPEN failed for %s", __func__, BT_IPC_SOURCE_LIB_NAME);
             ret = -ENOSYS;
             goto init_fail;
         } else {
-            a2dp.audio_stream_open = (audio_stream_open_t)
-                          dlsym(a2dp.bt_lib_handle, "audio_stream_open");
-            a2dp.audio_start_stream = (audio_start_stream_t)
-                          dlsym(a2dp.bt_lib_handle, "audio_start_stream");
-            a2dp.audio_get_codec_config = (audio_get_codec_config_t)
-                          dlsym(a2dp.bt_lib_handle, "audio_get_codec_config");
-            a2dp.audio_suspend_stream = (audio_suspend_stream_t)
-                          dlsym(a2dp.bt_lib_handle, "audio_suspend_stream");
-            a2dp.audio_handoff_triggered = (audio_handoff_triggered_t)
-                          dlsym(a2dp.bt_lib_handle, "audio_handoff_triggered");
-            a2dp.clear_a2dpsuspend_flag = (clear_a2dpsuspend_flag_t)
-                          dlsym(a2dp.bt_lib_handle, "clear_a2dpsuspend_flag");
-            a2dp.audio_stop_stream = (audio_stop_stream_t)
-                          dlsym(a2dp.bt_lib_handle, "audio_stop_stream");
-            a2dp.audio_stream_close = (audio_stream_close_t)
-                          dlsym(a2dp.bt_lib_handle, "audio_stream_close");
-            a2dp.audio_check_a2dp_ready = (audio_check_a2dp_ready_t)
-                        dlsym(a2dp.bt_lib_handle,"audio_check_a2dp_ready");
-            a2dp.audio_get_a2dp_sink_latency = (audio_get_a2dp_sink_latency_t)
-                        dlsym(a2dp.bt_lib_handle,"audio_get_a2dp_sink_latency");
-            a2dp.audio_is_scrambling_enabled = (audio_is_scrambling_enabled_t)
-                        dlsym(a2dp.bt_lib_handle,"audio_is_scrambling_enabled");
+            a2dp.audio_source_open = (audio_source_open_t)
+                          dlsym(a2dp.bt_lib_source_handle, "audio_stream_open");
+            a2dp.audio_source_start = (audio_source_start_t)
+                          dlsym(a2dp.bt_lib_source_handle, "audio_start_stream");
+            a2dp.audio_get_enc_config = (audio_get_enc_config_t)
+                          dlsym(a2dp.bt_lib_source_handle, "audio_get_codec_config");
+            a2dp.audio_source_suspend = (audio_source_suspend_t)
+                          dlsym(a2dp.bt_lib_source_handle, "audio_suspend_stream");
+            a2dp.audio_source_handoff_triggered = (audio_source_handoff_triggered_t)
+                          dlsym(a2dp.bt_lib_source_handle, "audio_handoff_triggered");
+            a2dp.clear_source_a2dpsuspend_flag = (clear_source_a2dpsuspend_flag_t)
+                          dlsym(a2dp.bt_lib_source_handle, "clear_a2dpsuspend_flag");
+            a2dp.audio_source_stop = (audio_source_stop_t)
+                          dlsym(a2dp.bt_lib_source_handle, "audio_stop_stream");
+            a2dp.audio_source_close = (audio_source_close_t)
+                          dlsym(a2dp.bt_lib_source_handle, "audio_stream_close");
+            a2dp.audio_source_check_a2dp_ready = (audio_source_check_a2dp_ready_t)
+                        dlsym(a2dp.bt_lib_source_handle,"audio_check_a2dp_ready");
+            a2dp.audio_sink_get_a2dp_latency = (audio_sink_get_a2dp_latency_t)
+                        dlsym(a2dp.bt_lib_source_handle,"audio_sink_get_a2dp_latency");
+            a2dp.audio_is_source_scrambling_enabled = (audio_is_source_scrambling_enabled_t)
+                        dlsym(a2dp.bt_lib_source_handle,"audio_is_scrambling_enabled");
            a2dp.audio_is_tws_mono_mode_enable = (audio_is_tws_mono_mode_enable_t)
-                        dlsym(a2dp.bt_lib_handle,"isTwsMonomodeEnable");
+                        dlsym(a2dp.bt_lib_source_handle,"isTwsMonomodeEnable");
         }
     }
 
-    if (a2dp.bt_lib_handle && a2dp.audio_stream_open) {
-        if (a2dp.bt_state == A2DP_STATE_DISCONNECTED) {
+    if (a2dp.bt_lib_source_handle && a2dp.audio_source_open) {
+        if (a2dp.bt_state_source == A2DP_STATE_DISCONNECTED) {
             ALOGD("calling BT stream open");
-            ret = a2dp.audio_stream_open();
+            ret = a2dp.audio_source_open();
             if(ret != 0) {
-                ALOGE("Failed to open output stream for a2dp: status %d", ret);
+                ALOGE("Failed to open source stream for a2dp: status %d", ret);
                 goto init_fail;
             }
-            a2dp.bt_state = A2DP_STATE_CONNECTED;
+            a2dp.bt_state_source = A2DP_STATE_CONNECTED;
         } else {
-            ALOGD("Called a2dp open with improper state, Ignoring request state %d", a2dp.bt_state);
+            ALOGD("Called a2dp open with improper state, Ignoring request state %d", a2dp.bt_state_source);
         }
     } else {
         ALOGE("a2dp handle is not identified, Ignoring open request");
-        a2dp.bt_state = A2DP_STATE_DISCONNECTED;
+        a2dp.bt_state_source = A2DP_STATE_DISCONNECTED;
         goto init_fail;
     }
 
 init_fail:
-    if(ret != 0 && (a2dp.bt_lib_handle != NULL)) {
-        dlclose(a2dp.bt_lib_handle);
-        a2dp.bt_lib_handle = NULL;
+    if(ret != 0 && (a2dp.bt_lib_source_handle != NULL)) {
+        dlclose(a2dp.bt_lib_source_handle);
+        a2dp.bt_lib_source_handle = NULL;
+    }
+}
+
+/* API to open BT IPC library to start IPC communication for BT Sink*/
+static void open_a2dp_sink()
+{
+    ALOGD(" Open A2DP input start ");
+    if (a2dp.bt_lib_sink_handle == NULL){
+        ALOGD(" Requesting for BT lib handle");
+        a2dp.bt_lib_sink_handle = dlopen(BT_IPC_SINK_LIB_NAME, RTLD_NOW);
+
+        if (a2dp.bt_lib_sink_handle == NULL) {
+            ALOGE("%s: DLOPEN failed for %s", __func__, BT_IPC_SINK_LIB_NAME);
+        } else {
+            a2dp.audio_sink_start = (audio_sink_start_t)
+                          dlsym(a2dp.bt_lib_sink_handle, "audio_sink_start_capture");
+            a2dp.audio_get_dec_config = (audio_get_dec_config_t)
+                          dlsym(a2dp.bt_lib_sink_handle, "audio_get_decoder_config");
+            a2dp.audio_sink_stop = (audio_sink_stop_t)
+                          dlsym(a2dp.bt_lib_sink_handle, "audio_sink_stop_capture");
+            a2dp.audio_sink_check_a2dp_ready = (audio_sink_check_a2dp_ready_t)
+                        dlsym(a2dp.bt_lib_sink_handle,"audio_sink_check_a2dp_ready");
+            a2dp.audio_sink_session_setup_complete = (audio_sink_session_setup_complete_t)
+                          dlsym(a2dp.bt_lib_sink_handle, "audio_sink_session_setup_complete");
+        }
     }
 }
 
 static int close_a2dp_output()
 {
     ALOGV("%s\n",__func__);
-    if (!(a2dp.bt_lib_handle && a2dp.audio_stream_close)) {
-        ALOGE("a2dp handle is not identified, Ignoring close request");
+
+    if (!(a2dp.bt_lib_source_handle && a2dp.audio_source_close)) {
+        ALOGE("a2dp source handle is not identified, Ignoring close request");
         return -ENOSYS;
     }
-    if (a2dp.bt_state != A2DP_STATE_DISCONNECTED) {
-        ALOGD("calling BT stream close");
-        if(a2dp.audio_stream_close() == false)
-            ALOGE("failed close a2dp control path from BT library");
+
+    if (a2dp.bt_state_source != A2DP_STATE_DISCONNECTED) {
+        ALOGD("calling BT source stream close");
+        if(a2dp.audio_source_close() == false)
+            ALOGE("failed close a2dp source control path from BT library");
     }
-    a2dp.a2dp_started = false;
-    a2dp.a2dp_total_active_session_request = 0;
-    a2dp.a2dp_suspended = false;
-    a2dp.bt_encoder_format = ENC_CODEC_TYPE_INVALID;
+    a2dp.a2dp_source_started = false;
+    a2dp.a2dp_source_total_active_session_requests = 0;
+    a2dp.a2dp_source_suspended = false;
+    a2dp.bt_encoder_format = CODEC_TYPE_INVALID;
     a2dp.enc_sampling_rate = 48000;
     a2dp.enc_channels = 2;
-    a2dp.bt_state = A2DP_STATE_DISCONNECTED;
+    a2dp.bt_state_source = A2DP_STATE_DISCONNECTED;
     if (a2dp.abr_config.is_abr_enabled && a2dp.abr_config.abr_started)
         stop_abr();
     a2dp.abr_config.is_abr_enabled = false;
     a2dp.abr_config.abr_started = false;
     a2dp.abr_config.imc_instance = 0;
     a2dp.abr_config.abr_tx_handle = NULL;
+    a2dp.bt_state_source = A2DP_STATE_DISCONNECTED;
+
+    return 0;
+}
+
+static int close_a2dp_input()
+{
+    ALOGV("%s\n",__func__);
+
+    if (!(a2dp.bt_lib_sink_handle && a2dp.audio_source_close)) {
+        ALOGE("a2dp sink handle is not identified, Ignoring close request");
+        return -ENOSYS;
+    }
+
+    if (a2dp.bt_state_sink != A2DP_STATE_DISCONNECTED) {
+        ALOGD("calling BT sink stream close");
+        if(a2dp.audio_source_close() == false)
+            ALOGE("failed close a2dp sink control path from BT library");
+    }
+    a2dp.a2dp_sink_started = false;
+    a2dp.a2dp_sink_total_active_session_requests = 0;
+    a2dp.bt_decoder_format = CODEC_TYPE_INVALID;
+    a2dp.dec_sampling_rate = 48000;
+    a2dp.dec_channels = 2;
+    a2dp.bt_state_sink = A2DP_STATE_DISCONNECTED;
 
     return 0;
 }
@@ -850,15 +984,15 @@
 {
     bool scrambler_mode = false;
     struct mixer_ctl *ctrl_scrambler_mode = NULL;
-    if (a2dp.audio_is_scrambling_enabled && (a2dp.bt_state != A2DP_STATE_DISCONNECTED))
-        scrambler_mode = a2dp.audio_is_scrambling_enabled();
+    if (a2dp.audio_is_source_scrambling_enabled && (a2dp.bt_state_source != A2DP_STATE_DISCONNECTED))
+        scrambler_mode = a2dp.audio_is_source_scrambling_enabled();
 
     if (scrambler_mode) {
         //enable scrambler in dsp
         ctrl_scrambler_mode = mixer_get_ctl_by_name(a2dp.adev->mixer,
                                             MIXER_SCRAMBLER_MODE);
         if (!ctrl_scrambler_mode) {
-            ALOGE(" ERROR scrambler mode mixer control not identifed");
+            ALOGE(" ERROR scrambler mode mixer control not identified");
             return;
         } else {
             if (mixer_ctl_set_value(ctrl_scrambler_mode, 0, true) != 0) {
@@ -869,21 +1003,29 @@
     }
 }
 
-static int a2dp_set_backend_cfg()
+static bool a2dp_set_backend_cfg(uint8_t direction)
 {
-    char *rate_str = NULL, *in_channels = NULL;
-    uint32_t sampling_rate_rx = a2dp.enc_sampling_rate;
-    struct mixer_ctl *ctl_sample_rate = NULL, *ctrl_in_channels = NULL;
+    char *rate_str = NULL, *channels = NULL;
+    uint32_t sampling_rate;
+    struct mixer_ctl *ctl_sample_rate = NULL, *ctrl_channels = NULL;
+    bool is_configured = false;
 
-    //For LDAC encoder open slimbus port at 96Khz for 48Khz input
-    //and 88.2Khz for 44.1Khz input.
-    if ((a2dp.bt_encoder_format == ENC_CODEC_TYPE_LDAC) &&
-        (sampling_rate_rx == 48000 || sampling_rate_rx == 44100 )) {
-        sampling_rate_rx *= 2;
+    if (direction == SINK) {
+        sampling_rate = a2dp.dec_sampling_rate;
+    } else {
+        sampling_rate = a2dp.enc_sampling_rate;
+    }
+    //For LDAC encoder and AAC decoder open slimbus port at
+    //96Khz for 48Khz input and 88.2Khz for 44.1Khz input.
+    if (((a2dp.bt_encoder_format == CODEC_TYPE_LDAC) ||
+         (a2dp.bt_decoder_format == CODEC_TYPE_SBC) ||
+         (a2dp.bt_decoder_format == AUDIO_FORMAT_AAC)) &&
+        (sampling_rate == 48000 || sampling_rate == 44100 )) {
+        sampling_rate = sampling_rate *2;
     }
 
-    // Set Rx backend sample rate
-    switch (sampling_rate_rx) {
+    //Configure backend sampling rate
+    switch (sampling_rate) {
     case 44100:
         rate_str = "KHZ_44P1";
         break;
@@ -899,31 +1041,42 @@
         break;
     }
 
-    ALOGD("%s: set backend rx sample rate = %s", __func__, rate_str);
-    ctl_sample_rate = mixer_get_ctl_by_name(a2dp.adev->mixer,
-                                        MIXER_SAMPLE_RATE_RX);
+    if (direction == SINK) {
+        ALOGD("%s: set sink backend sample rate =%s", __func__, rate_str);
+        ctl_sample_rate = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                            MIXER_SINK_SAMPLE_RATE);
+    } else {
+        ALOGD("%s: set source backend sample rate =%s", __func__, rate_str);
+        ctl_sample_rate = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                            MIXER_SAMPLE_RATE_RX);
+    }
     if (ctl_sample_rate) {
 
         if (mixer_ctl_set_enum_by_string(ctl_sample_rate, rate_str) != 0) {
             ALOGE("%s: Failed to set backend sample rate = %s", __func__, rate_str);
-            return -ENOSYS;
+            is_configured = false;
+            goto fail;
         }
 
-        /* Set Tx backend sample rate */
-        if (a2dp.abr_config.is_abr_enabled)
-        rate_str = ABR_TX_SAMPLE_RATE;
+        if (direction == SOURCE) {
+            /* Set Tx backend sample rate */
+            if (a2dp.abr_config.is_abr_enabled)
+            rate_str = ABR_TX_SAMPLE_RATE;
 
-        ALOGD("%s: set backend tx sample rate = %s", __func__, rate_str);
-        ctl_sample_rate = mixer_get_ctl_by_name(a2dp.adev->mixer,
-                                            MIXER_SAMPLE_RATE_TX);
-        if (!ctl_sample_rate) {
+            ALOGD("%s: set backend tx sample rate = %s", __func__, rate_str);
+            ctl_sample_rate = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                            MIXER_SOURCE_SAMPLE_RATE_TX);
+            if (!ctl_sample_rate) {
                 ALOGE("%s: ERROR backend sample rate mixer control not identifed", __func__);
-                return -ENOSYS;
-        }
+                is_configured = false;
+                goto fail;
+            }
 
-        if (mixer_ctl_set_enum_by_string(ctl_sample_rate, rate_str) != 0) {
-            ALOGE("%s: Failed to set backend sample rate = %s", __func__, rate_str);
-            return -ENOSYS;
+            if (mixer_ctl_set_enum_by_string(ctl_sample_rate, rate_str) != 0) {
+                ALOGE("%s: Failed to set backend sample rate = %s", __func__, rate_str);
+                is_configured = false;
+                goto fail;
+            }
         }
     } else {
         /* Fallback to legacy approch if MIXER_SAMPLE_RATE_RX and
@@ -932,39 +1085,127 @@
                                         MIXER_SAMPLE_RATE_DEFAULT);
         if (!ctl_sample_rate) {
             ALOGE("%s: ERROR backend sample rate mixer control not identifed", __func__);
-            return -ENOSYS;
+            is_configured = false;
+            goto fail;
         }
 
         if (mixer_ctl_set_enum_by_string(ctl_sample_rate, rate_str) != 0) {
             ALOGE("%s: Failed to set backend sample rate = %s", __func__, rate_str);
-            return -ENOSYS;
+            is_configured = false;
+            goto fail;
         }
     }
 
-    //Configure AFE input channels
-    switch (a2dp.enc_channels) {
-    case 1:
-        in_channels = "One";
+    if (direction == SINK) {
+        switch (a2dp.dec_channels) {
+        case 1:
+            channels = "One";
+            break;
+        case 2:
+        default:
+            channels = "Two";
+            break;
+        }
+
+        ALOGD("%s: set afe dec channels =%d", __func__, channels);
+        ctrl_channels = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                            MIXER_AFE_SINK_CHANNELS);
+    } else {
+        //Configure AFE enc channels
+        switch (a2dp.enc_channels) {
+        case 1:
+            channels = "One";
+            break;
+        case 2:
+        default:
+            channels = "Two";
+            break;
+        }
+
+        ALOGD("%s: set afe enc channels =%d", __func__, channels);
+        ctrl_channels = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                            MIXER_AFE_IN_CHANNELS);
+    }
+
+    if (!ctrl_channels) {
+        ALOGE(" ERROR AFE channels mixer control not identified");
+    } else {
+        if (mixer_ctl_set_enum_by_string(ctrl_channels, channels) != 0) {
+            ALOGE("%s: Failed to set AFE channels =%d", __func__, channels);
+            is_configured = false;
+            goto fail;
+        }
+    }
+    is_configured = true;
+fail:
+    return is_configured;
+}
+
+bool configure_aac_dec_format(audio_aac_dec_config_t *aac_bt_cfg)
+{
+    struct mixer_ctl *ctl_dec_data = NULL, *ctrl_bit_format = NULL;
+    struct aac_dec_cfg_t aac_dsp_cfg;
+    bool is_configured = false;
+    int ret = 0;
+
+    if(aac_bt_cfg == NULL)
+        return false;
+
+    ctl_dec_data = mixer_get_ctl_by_name(a2dp.adev->mixer, MIXER_SINK_DEC_CONFIG_BLOCK);
+    if (!ctl_dec_data) {
+        ALOGE(" ERROR  a2dp decoder CONFIG data mixer control not identified");
+        is_configured = false;
+        goto fail;
+    }
+
+    memset(&aac_dsp_cfg, 0x0, sizeof(struct aac_dec_cfg_t));
+    aac_dsp_cfg.dec_format = MEDIA_FMT_AAC;
+    aac_dsp_cfg.data.aac_fmt_flag = aac_bt_cfg->aac_fmt_flag;
+    aac_dsp_cfg.data.channels = aac_bt_cfg->channels;
+    switch(aac_bt_cfg->audio_object_type) {
+    case 0:
+        aac_dsp_cfg.data.audio_object_type = MEDIA_FMT_AAC_AOT_LC;
         break;
     case 2:
+        aac_dsp_cfg.data.audio_object_type = MEDIA_FMT_AAC_AOT_PS;
+        break;
+    case 1:
     default:
-        in_channels = "Two";
+        aac_dsp_cfg.data.audio_object_type = MEDIA_FMT_AAC_AOT_SBR;
         break;
     }
-
-    ALOGD("%s: set AFE input channels = %d", __func__, a2dp.enc_channels);
-    ctrl_in_channels = mixer_get_ctl_by_name(a2dp.adev->mixer,
-                                        MIXER_AFE_IN_CHANNELS);
-    if (!ctrl_in_channels) {
-        ALOGE("%s: ERROR AFE input channels mixer control not identifed", __func__);
-        return -ENOSYS;
-    }
-    if (mixer_ctl_set_enum_by_string(ctrl_in_channels, in_channels) != 0) {
-        ALOGE("%s: Failed to set AFE in channels = %d", __func__, a2dp.enc_channels);
-        return -ENOSYS;
+    aac_dsp_cfg.data.total_size_of_pce_bits = aac_bt_cfg->total_size_of_pce_bits;
+    aac_dsp_cfg.data.sampling_rate = aac_bt_cfg->sampling_rate;
+    ret = mixer_ctl_set_array(ctl_dec_data, (void *)&aac_dsp_cfg,
+                              sizeof(struct aac_dec_cfg_t));
+    if (ret != 0) {
+        ALOGE("%s: failed to set AAC decoder config", __func__);
+        is_configured = false;
+        goto fail;
     }
 
-    return 0;
+    ctrl_bit_format = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                            MIXER_DEC_BIT_FORMAT);
+    if (!ctrl_bit_format) {
+        ALOGE(" ERROR Dec bit format mixer control not identified");
+        is_configured = false;
+        goto fail;
+    }
+    ret = mixer_ctl_set_enum_by_string(ctrl_bit_format, "S16_LE");
+    if (ret != 0) {
+        ALOGE("%s: Failed to set bit format to decoder", __func__);
+        is_configured = false;
+        goto fail;
+    }
+
+    is_configured = true;
+    a2dp.bt_decoder_format = CODEC_TYPE_AAC;
+    a2dp.dec_channels = aac_dsp_cfg.data.channels;
+    a2dp.dec_sampling_rate = aac_dsp_cfg.data.sampling_rate;
+    ALOGV("Successfully updated AAC dec format with sampling_rate: %d channels:%d",
+           aac_dsp_cfg.data.sampling_rate, aac_dsp_cfg.data.channels);
+fail:
+    return is_configured;
 }
 
 static int a2dp_set_bit_format(uint32_t enc_bit_format)
@@ -1000,25 +1241,31 @@
     return 0;
 }
 
-static int a2dp_reset_backend_cfg()
+static int a2dp_reset_backend_cfg(uint8_t direction)
 {
-    const char *rate_str = "KHZ_8", *in_channels = "Zero";
-    struct mixer_ctl *ctl_sample_rate_rx = NULL, *ctl_sample_rate_tx = NULL;
-    struct mixer_ctl *ctrl_in_channels = NULL;
+    const char *rate_str = "KHZ_8", *channels = "Zero";
+    struct mixer_ctl *ctl_sample_rate = NULL, *ctl_sample_rate_tx = NULL;
+    struct mixer_ctl *ctrl_channels = NULL;
 
     // Reset backend sampling rate
-    ALOGD("%s: reset backend sample rate = %s", __func__, rate_str);
-    ctl_sample_rate_rx = mixer_get_ctl_by_name(a2dp.adev->mixer,
-                                        MIXER_SAMPLE_RATE_RX);
-    if (ctl_sample_rate_rx) {
+    if (direction == SINK) {
+        ALOGD("%s: reset sink backend sample rate =%s", __func__, rate_str);
+        ctl_sample_rate = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                              MIXER_SINK_SAMPLE_RATE);
+    } else {
+        ALOGD("%s: reset source backend sample rate =%s", __func__, rate_str);
+        ctl_sample_rate = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                              MIXER_SAMPLE_RATE_RX);
+    }
+    if (ctl_sample_rate) {
 
-        if (mixer_ctl_set_enum_by_string(ctl_sample_rate_rx, rate_str) != 0) {
-            ALOGE("%s: Failed to reset Rx backend sample rate = %s", __func__, rate_str);
+        if (mixer_ctl_set_enum_by_string(ctl_sample_rate, rate_str) != 0) {
+            ALOGE("%s: Failed to reset backend sample rate = %s", __func__, rate_str);
             return -ENOSYS;
         }
 
         ctl_sample_rate_tx = mixer_get_ctl_by_name(a2dp.adev->mixer,
-                                        MIXER_SAMPLE_RATE_TX);
+                                        MIXER_SOURCE_SAMPLE_RATE_TX);
         if (!ctl_sample_rate_tx) {
                 ALOGE("%s: ERROR Tx backend sample rate mixer control not identifed", __func__);
                 return -ENOSYS;
@@ -1030,28 +1277,34 @@
         }
     } else {
 
-        ctl_sample_rate_rx = mixer_get_ctl_by_name(a2dp.adev->mixer,
+        ctl_sample_rate = mixer_get_ctl_by_name(a2dp.adev->mixer,
                                         MIXER_SAMPLE_RATE_DEFAULT);
-        if (!ctl_sample_rate_rx) {
+        if (!ctl_sample_rate) {
             ALOGE("%s: ERROR backend sample rate mixer control not identifed", __func__);
             return -ENOSYS;
         }
 
-        if (mixer_ctl_set_enum_by_string(ctl_sample_rate_rx, rate_str) != 0) {
+        if (mixer_ctl_set_enum_by_string(ctl_sample_rate, rate_str) != 0) {
             ALOGE("%s: Failed to reset backend sample rate = %s", __func__, rate_str);
             return -ENOSYS;
         }
     }
 
     // Reset AFE input channels
-    ALOGD("%s: reset AFE input channels = %s", __func__, in_channels);
-    ctrl_in_channels = mixer_get_ctl_by_name(a2dp.adev->mixer,
-                                        MIXER_AFE_IN_CHANNELS);
-    if (!ctrl_in_channels) {
+    if (direction == SINK) {
+        ALOGD("%s: reset afe sink channels =%s", __func__, channels);
+        ctrl_channels = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                            MIXER_AFE_SINK_CHANNELS);
+    } else {
+        ALOGD("%s: reset afe source channels =%s", __func__, channels);
+        ctrl_channels = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                            MIXER_AFE_IN_CHANNELS);
+    }
+    if (!ctrl_channels) {
         ALOGE("%s: ERROR AFE input channels mixer control not identifed", __func__);
         return -ENOSYS;
     }
-    if (mixer_ctl_set_enum_by_string(ctrl_in_channels, in_channels) != 0) {
+    if (mixer_ctl_set_enum_by_string(ctrl_channels, channels) != 0) {
         ALOGE("%s: Failed to reset AFE in channels = %d", __func__, a2dp.enc_channels);
         return -ENOSYS;
     }
@@ -1060,14 +1313,14 @@
 }
 
 /* API to configure AFE decoder in DSP */
-static bool configure_a2dp_decoder_format(int dec_format)
+static bool configure_a2dp_source_decoder_format(int dec_format)
 {
     struct mixer_ctl *ctl_dec_data = NULL;
     struct abr_dec_cfg_t dec_cfg;
     int ret = 0;
 
     if (a2dp.abr_config.is_abr_enabled) {
-        ctl_dec_data = mixer_get_ctl_by_name(a2dp.adev->mixer, MIXER_DEC_CONFIG_BLOCK);
+        ctl_dec_data = mixer_get_ctl_by_name(a2dp.adev->mixer, MIXER_SOURCE_DEC_CONFIG_BLOCK);
         if (!ctl_dec_data) {
             ALOGE("%s: ERROR A2DP codec config data mixer control not identifed", __func__);
             return false;
@@ -1085,9 +1338,104 @@
             ALOGE("%s: Failed to set decoder config", __func__);
             return false;
         }
+     }
+
+     return true;
+}
+
+bool configure_sbc_dec_format(audio_sbc_dec_config_t *sbc_bt_cfg)
+{
+    struct mixer_ctl *ctl_dec_data = NULL, *ctrl_bit_format = NULL;
+    struct sbc_dec_cfg_t sbc_dsp_cfg;
+    bool is_configured = false;
+    int ret = 0;
+
+    if(sbc_bt_cfg == NULL)
+        goto fail;
+
+    ctl_dec_data = mixer_get_ctl_by_name(a2dp.adev->mixer, MIXER_SINK_DEC_CONFIG_BLOCK);
+    if (!ctl_dec_data) {
+        ALOGE(" ERROR  a2dp decoder CONFIG data mixer control not identified");
+        is_configured = false;
+        goto fail;
     }
 
-    return true;
+    memset(&sbc_dsp_cfg, 0x0, sizeof(struct sbc_dec_cfg_t));
+    sbc_dsp_cfg.dec_format = MEDIA_FMT_SBC;
+    sbc_dsp_cfg.data.channels = sbc_bt_cfg->channels;
+    sbc_dsp_cfg.data.sampling_rate = sbc_bt_cfg->sampling_rate;
+    ret = mixer_ctl_set_array(ctl_dec_data, (void *)&sbc_dsp_cfg,
+                              sizeof(struct sbc_dec_cfg_t));
+
+    if (ret != 0) {
+        ALOGE("%s: failed to set SBC decoder config", __func__);
+        is_configured = false;
+        goto fail;
+    }
+
+    ctrl_bit_format = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                            MIXER_DEC_BIT_FORMAT);
+    if (!ctrl_bit_format) {
+        ALOGE(" ERROR Dec bit format mixer control not identified");
+        is_configured = false;
+        goto fail;
+    }
+    ret = mixer_ctl_set_enum_by_string(ctrl_bit_format, "S16_LE");
+    if (ret != 0) {
+        ALOGE("%s: Failed to set bit format to decoder", __func__);
+        is_configured = false;
+        goto fail;
+    }
+
+    is_configured = true;
+    a2dp.bt_decoder_format = CODEC_TYPE_SBC;
+    if (sbc_dsp_cfg.data.channels == MEDIA_FMT_SBC_CHANNEL_MODE_MONO)
+        a2dp.dec_channels = 1;
+    else
+        a2dp.dec_channels = 2;
+    a2dp.dec_sampling_rate = sbc_dsp_cfg.data.sampling_rate;
+    ALOGV("Successfully updated SBC dec format");
+fail:
+    return is_configured;
+}
+
+/* API to configure AFE decoder in DSP */
+static bool configure_a2dp_sink_decoder_format()
+{
+    void *codec_info = NULL;
+    codec_t codec_type = CODEC_TYPE_INVALID;
+    bool is_configured = false;
+    struct mixer_ctl *ctl_dec_data = NULL;
+    int ret = 0;
+
+    if (!a2dp.audio_get_dec_config) {
+        ALOGE(" a2dp handle is not identified, ignoring a2dp decoder config");
+        return false;
+    }
+
+    ctl_dec_data = mixer_get_ctl_by_name(a2dp.adev->mixer, MIXER_SINK_DEC_CONFIG_BLOCK);
+    if (!ctl_dec_data) {
+        ALOGE(" ERROR  a2dp decoder CONFIG data mixer control not identified");
+        is_configured = false;
+        return false;
+    }
+    codec_info = a2dp.audio_get_dec_config(&codec_type);
+    switch(codec_type) {
+        case CODEC_TYPE_SBC:
+            ALOGD(" SBC decoder supported BT device");
+            is_configured = configure_sbc_dec_format((audio_sbc_dec_config_t *)codec_info);
+            break;
+        case CODEC_TYPE_AAC:
+            ALOGD(" AAC decoder supported BT device");
+            is_configured =
+              configure_aac_dec_format((audio_aac_dec_config_t *)codec_info);
+            break;
+        default:
+            ALOGD(" Received Unsupported decoder format");
+            is_configured = false;
+            break;
+    }
+    return is_configured;
 }
 
 /* API to configure SBC DSP encoder */
@@ -1103,12 +1451,12 @@
 
    ctl_enc_data = mixer_get_ctl_by_name(a2dp.adev->mixer, MIXER_ENC_CONFIG_BLOCK);
     if (!ctl_enc_data) {
-        ALOGE(" ERROR  a2dp encoder CONFIG data mixer control not identifed");
+        ALOGE(" ERROR  a2dp encoder CONFIG data mixer control not identified");
         is_configured = false;
         goto fail;
     }
     memset(&sbc_dsp_cfg, 0x0, sizeof(struct sbc_enc_cfg_t));
-    sbc_dsp_cfg.enc_format = ENC_MEDIA_FMT_SBC;
+    sbc_dsp_cfg.enc_format = MEDIA_FMT_SBC;
     sbc_dsp_cfg.num_subbands = sbc_bt_cfg->subband;
     sbc_dsp_cfg.blk_len = sbc_bt_cfg->blk_len;
     switch(sbc_bt_cfg->channels) {
@@ -1145,7 +1493,7 @@
         goto fail;
     }
     is_configured = true;
-    a2dp.bt_encoder_format = ENC_CODEC_TYPE_SBC;
+    a2dp.bt_encoder_format = CODEC_TYPE_SBC;
     a2dp.enc_sampling_rate = sbc_bt_cfg->sampling_rate;
 
     if (sbc_dsp_cfg.channel_mode == MEDIA_FMT_SBC_CHANNEL_MODE_MONO)
@@ -1259,7 +1607,7 @@
     }
 
     memset(aptx_dsp_cfg, 0x0, sizeof(struct aptx_enc_cfg_t));
-    aptx_dsp_cfg->custom_cfg.enc_format = ENC_MEDIA_FMT_APTX;
+    aptx_dsp_cfg->custom_cfg.enc_format = MEDIA_FMT_APTX;
 
     if (!a2dp.is_aptx_dual_mono_supported) {
         aptx_dsp_cfg->custom_cfg.sample_rate = aptx_bt_cfg->default_cfg->sampling_rate;
@@ -1316,7 +1664,7 @@
     }
 
     memset(&aptx_dsp_cfg, 0x0, sizeof(struct custom_enc_cfg_t));
-    aptx_dsp_cfg->enc_format = ENC_MEDIA_FMT_APTX;
+    aptx_dsp_cfg->enc_format = MEDIA_FMT_APTX;
     aptx_dsp_cfg->sample_rate = aptx_bt_cfg->sampling_rate;
     aptx_dsp_cfg->num_channels = aptx_bt_cfg->channels;
     switch(aptx_dsp_cfg->num_channels) {
@@ -1410,9 +1758,9 @@
     }
     is_configured = true;
     if (a2dp.is_aptx_adaptive)
-        a2dp.bt_encoder_format = ENC_CODEC_TYPE_APTX_AD;
+        a2dp.bt_encoder_format = CODEC_TYPE_APTX_AD;
     else
-        a2dp.bt_encoder_format = ENC_CODEC_TYPE_APTX;
+        a2dp.bt_encoder_format = CODEC_TYPE_APTX;
 fail:
     /*restore sample rate */
     if(!is_configured)
@@ -1438,13 +1786,13 @@
 
     ctl_enc_data = mixer_get_ctl_by_name(a2dp.adev->mixer, MIXER_ENC_CONFIG_BLOCK);
     if (!ctl_enc_data) {
-        ALOGE(" ERROR  a2dp encoder CONFIG data mixer control not identifed");
+        ALOGE(" ERROR  a2dp encoder CONFIG data mixer control not identified");
         is_configured = false;
         goto fail;
     }
 
     memset(&aptx_dsp_cfg, 0x0, sizeof(struct custom_enc_cfg_t));
-    aptx_dsp_cfg.enc_format = ENC_MEDIA_FMT_APTX_HD;
+    aptx_dsp_cfg.enc_format = MEDIA_FMT_APTX_HD;
     aptx_dsp_cfg.sample_rate = aptx_bt_cfg->sampling_rate;
     aptx_dsp_cfg.num_channels = aptx_bt_cfg->channels;
     switch(aptx_dsp_cfg.num_channels) {
@@ -1470,7 +1818,7 @@
         goto fail;
     }
     is_configured = true;
-    a2dp.bt_encoder_format = ENC_CODEC_TYPE_APTX_HD;
+    a2dp.bt_encoder_format = CODEC_TYPE_APTX_HD;
     a2dp.enc_sampling_rate = aptx_bt_cfg->sampling_rate;
     a2dp.enc_channels = aptx_bt_cfg->channels;
     ALOGV("Successfully updated APTX HD encformat with samplingrate: %d channels:%d",
@@ -1492,12 +1840,12 @@
 
     ctl_enc_data = mixer_get_ctl_by_name(a2dp.adev->mixer, MIXER_ENC_CONFIG_BLOCK);
     if (!ctl_enc_data) {
-        ALOGE(" ERROR  a2dp encoder CONFIG data mixer control not identifed");
+        ALOGE(" ERROR  a2dp encoder CONFIG data mixer control not identified");
         is_configured = false;
         goto fail;
     }
     memset(&aac_dsp_cfg, 0x0, sizeof(struct aac_enc_cfg_t));
-    aac_dsp_cfg.enc_format = ENC_MEDIA_FMT_AAC;
+    aac_dsp_cfg.enc_format = MEDIA_FMT_AAC;
     aac_dsp_cfg.bit_rate = aac_bt_cfg->bitrate;
     aac_dsp_cfg.sample_rate = aac_bt_cfg->sampling_rate;
     switch (aac_bt_cfg->enc_mode) {
@@ -1528,7 +1876,7 @@
         goto fail;
     }
     is_configured = true;
-    a2dp.bt_encoder_format = ENC_CODEC_TYPE_AAC;
+    a2dp.bt_encoder_format = CODEC_TYPE_AAC;
     a2dp.enc_sampling_rate = aac_bt_cfg->sampling_rate;
     a2dp.enc_channels = aac_bt_cfg->channels;
     ALOGV("%s: Successfully updated AAC enc format with sampling rate: %d channels:%d",
@@ -1607,13 +1955,13 @@
 
     ctl_enc_data = mixer_get_ctl_by_name(a2dp.adev->mixer, MIXER_ENC_CONFIG_BLOCK);
     if (!ctl_enc_data) {
-        ALOGE(" ERROR  a2dp encoder CONFIG data mixer control not identifed");
+        ALOGE(" ERROR  a2dp encoder CONFIG data mixer control not identified");
         is_configured = false;
         goto fail;
     }
     memset(&celt_dsp_cfg, 0x0, sizeof(struct celt_enc_cfg_t));
 
-    celt_dsp_cfg.custom_cfg.enc_format = ENC_MEDIA_FMT_CELT;
+    celt_dsp_cfg.custom_cfg.enc_format = MEDIA_FMT_CELT;
     celt_dsp_cfg.custom_cfg.sample_rate = celt_bt_cfg->sampling_rate;
     celt_dsp_cfg.custom_cfg.num_channels = celt_bt_cfg->channels;
     switch(celt_dsp_cfg.custom_cfg.num_channels) {
@@ -1648,7 +1996,7 @@
         goto fail;
     }
     is_configured = true;
-    a2dp.bt_encoder_format = ENC_CODEC_TYPE_CELT;
+    a2dp.bt_encoder_format = CODEC_TYPE_CELT;
     a2dp.enc_sampling_rate = celt_bt_cfg->sampling_rate;
     a2dp.enc_channels = celt_bt_cfg->channels;
     ALOGV("Successfully updated CELT encformat with samplingrate: %d channels:%d",
@@ -1668,13 +2016,13 @@
 
     ldac_enc_data = mixer_get_ctl_by_name(a2dp.adev->mixer, MIXER_ENC_CONFIG_BLOCK);
     if (!ldac_enc_data) {
-        ALOGE(" ERROR  a2dp encoder CONFIG data mixer control not identifed");
+        ALOGE(" ERROR  a2dp encoder CONFIG data mixer control not identified");
         is_configured = false;
         goto fail;
     }
     memset(&ldac_dsp_cfg, 0x0, sizeof(struct ldac_enc_cfg_t));
 
-    ldac_dsp_cfg.custom_cfg.enc_format = ENC_MEDIA_FMT_LDAC;
+    ldac_dsp_cfg.custom_cfg.enc_format = MEDIA_FMT_LDAC;
     ldac_dsp_cfg.custom_cfg.sample_rate = ldac_bt_cfg->sampling_rate;
     ldac_dsp_cfg.ldac_cfg.channel_mode = ldac_bt_cfg->channel_mode;
     switch(ldac_dsp_cfg.ldac_cfg.channel_mode) {
@@ -1716,7 +2064,7 @@
         goto fail;
     }
     is_configured = true;
-    a2dp.bt_encoder_format = ENC_CODEC_TYPE_LDAC;
+    a2dp.bt_encoder_format = CODEC_TYPE_LDAC;
     a2dp.enc_sampling_rate = ldac_bt_cfg->sampling_rate;
     a2dp.enc_channels = ldac_dsp_cfg.custom_cfg.num_channels;
     a2dp.abr_config.is_abr_enabled = ldac_bt_cfg->is_abr_enabled;
@@ -1730,16 +2078,16 @@
 {
     void *codec_info = NULL;
     uint8_t multi_cast = 0, num_dev = 1;
-    enc_codec_t codec_type = ENC_CODEC_TYPE_INVALID;
+    codec_t codec_type = CODEC_TYPE_INVALID;
     bool is_configured = false;
     audio_aptx_encoder_config aptx_encoder_cfg;
 
-    if (!a2dp.audio_get_codec_config) {
+    if (!a2dp.audio_get_enc_config) {
         ALOGE(" a2dp handle is not identified, ignoring a2dp encoder config");
         return false;
     }
     ALOGD("configure_a2dp_encoder_format start");
-    codec_info = a2dp.audio_get_codec_config(&multi_cast, &num_dev,
+    codec_info = a2dp.audio_get_enc_config(&multi_cast, &num_dev,
                                &codec_type);
 
     // ABR disabled by default for all codecs
@@ -1747,12 +2095,12 @@
     a2dp.is_aptx_adaptive = false;
 
     switch(codec_type) {
-        case ENC_CODEC_TYPE_SBC:
+        case CODEC_TYPE_SBC:
             ALOGD(" Received SBC encoder supported BT device");
             is_configured =
               configure_sbc_enc_format((audio_sbc_encoder_config *)codec_info);
             break;
-        case ENC_CODEC_TYPE_APTX:
+        case CODEC_TYPE_APTX:
             ALOGD(" Received APTX encoder supported BT device");
 #ifndef LINUX_ENABLED
             a2dp.is_aptx_dual_mono_supported = false;
@@ -1761,7 +2109,7 @@
             is_configured =
               configure_aptx_enc_format(&aptx_encoder_cfg);
             break;
-        case ENC_CODEC_TYPE_APTX_HD:
+        case CODEC_TYPE_APTX_HD:
             ALOGD(" Received APTX HD encoder supported BT device");
 #ifndef LINUX_ENABLED
             is_configured =
@@ -1772,7 +2120,7 @@
 #endif
             break;
 #ifndef LINUX_ENABLED
-        case ENC_CODEC_TYPE_APTX_DUAL_MONO:
+        case CODEC_TYPE_APTX_DUAL_MONO:
             ALOGD(" Received APTX dual mono encoder supported BT device");
             a2dp.is_aptx_dual_mono_supported = true;
             if (a2dp.audio_is_tws_mono_mode_enable != NULL)
@@ -1782,7 +2130,7 @@
               configure_aptx_enc_format(&aptx_encoder_cfg);
             break;
 #endif
-        case ENC_CODEC_TYPE_AAC:
+        case CODEC_TYPE_AAC:
             ALOGD(" Received AAC encoder supported BT device");
             bool is_aac_frame_ctl_enabled =
                     property_get_bool("persist.vendor.bt.aac_frm_ctl.enabled", false);
@@ -1790,22 +2138,22 @@
                   configure_aac_enc_format_v2((audio_aac_encoder_config_v2 *) codec_info) :
                   configure_aac_enc_format((audio_aac_encoder_config *) codec_info);
             break;
-        case ENC_CODEC_TYPE_CELT:
+        case CODEC_TYPE_CELT:
             ALOGD(" Received CELT encoder supported BT device");
             is_configured =
               configure_celt_enc_format((audio_celt_encoder_config *)codec_info);
             break;
-        case ENC_CODEC_TYPE_LDAC:
+        case CODEC_TYPE_LDAC:
             ALOGD(" Received LDAC encoder supported BT device");
             if (!instance_id || instance_id > MAX_INSTANCE_ID)
                 instance_id = MAX_INSTANCE_ID;
             a2dp.abr_config.imc_instance = instance_id--;
             is_configured =
                 (configure_ldac_enc_format((audio_ldac_encoder_config *)codec_info) &&
-                 configure_a2dp_decoder_format(ENC_CODEC_TYPE_LDAC));
+                 configure_a2dp_source_decoder_format(CODEC_TYPE_LDAC));
             break;
 #ifndef LINUX_ENABLED //Temporarily disabled for LE, need to take care while doing VT FR
-         case ENC_CODEC_TYPE_APTX_AD:
+         case CODEC_TYPE_APTX_AD:
              ALOGD(" Received APTX AD encoder supported BT device");
              if (!instance_id || instance_id > MAX_INSTANCE_ID)
                  instance_id = MAX_INSTANCE_ID;
@@ -1815,7 +2163,7 @@
               aptx_encoder_cfg.ad_cfg = (audio_aptx_ad_config *)codec_info;
               is_configured =
                 (configure_aptx_enc_format(&aptx_encoder_cfg) &&
-                 configure_a2dp_decoder_format(ENC_MEDIA_FMT_APTX_AD));
+                 configure_a2dp_source_decoder_format(ENC_MEDIA_FMT_APTX_AD));
             break;
 #endif
         default:
@@ -1832,49 +2180,135 @@
 
     ALOGD("audio_extn_a2dp_start_playback start");
 
-    if(!(a2dp.bt_lib_handle && a2dp.audio_start_stream
-       && a2dp.audio_get_codec_config)) {
-        ALOGE("a2dp handle is not identified, Ignoring start request");
+    if(!(a2dp.bt_lib_source_handle && a2dp.audio_source_start
+       && a2dp.audio_get_enc_config)) {
+        ALOGE("a2dp handle is not identified, Ignoring start playback request");
         return -ENOSYS;
     }
 
-    if(a2dp.a2dp_suspended == true) {
+    if(a2dp.a2dp_source_suspended == true) {
         //session will be restarted after suspend completion
         ALOGD("a2dp start requested during suspend state");
         return -ENOSYS;
     }
 
-    if (!a2dp.a2dp_started && !a2dp.a2dp_total_active_session_request) {
+    if (!a2dp.a2dp_source_started && !a2dp.a2dp_source_total_active_session_requests) {
         ALOGD("calling BT module stream start");
         /* This call indicates BT IPC lib to start playback */
-        ret =  a2dp.audio_start_stream();
+        ret =  a2dp.audio_source_start();
         ALOGE("BT controller start return = %d",ret);
         if (ret != 0 ) {
            ALOGE("BT controller start failed");
-           a2dp.a2dp_started = false;
+           a2dp.a2dp_source_started = false;
         } else {
            if(configure_a2dp_encoder_format() == true) {
-                a2dp.a2dp_started = true;
+                a2dp.a2dp_source_started = true;
                 ret = 0;
                 ALOGD("Start playback successful to BT library");
            } else {
                 ALOGD(" unable to configure DSP encoder");
-                a2dp.a2dp_started = false;
+                a2dp.a2dp_source_started = false;
                 ret = -ETIMEDOUT;
            }
         }
     }
 
-    if (a2dp.a2dp_started) {
-        a2dp.a2dp_total_active_session_request++;
+    if (a2dp.a2dp_source_started) {
+        a2dp.a2dp_source_total_active_session_requests++;
         a2dp_check_and_set_scrambler();
-        a2dp_set_backend_cfg();
+        a2dp_set_backend_cfg(SOURCE);
         if (a2dp.abr_config.is_abr_enabled)
             start_abr();
     }
 
     ALOGD("start A2DP playback total active sessions :%d",
-          a2dp.a2dp_total_active_session_request);
+          a2dp.a2dp_source_total_active_session_requests);
+    return ret;
+}
+
+uint64_t audio_extn_a2dp_get_decoder_latency()
+{
+    uint32_t latency = 0;
+
+    switch(a2dp.bt_decoder_format) {
+        case CODEC_TYPE_SBC:
+            latency = DEFAULT_SINK_LATENCY_SBC;
+            break;
+        case CODEC_TYPE_AAC:
+            latency = DEFAULT_SINK_LATENCY_AAC;
+            break;
+        default:
+            latency = 200;
+            ALOGD("No valid decoder defined, setting latency to %dms", latency);
+            break;
+    }
+    return (uint64_t)latency;
+}
+
+bool a2dp_send_sink_setup_complete(void) {
+    uint64_t system_latency = 0;
+    bool is_complete = false;
+
+    system_latency = audio_extn_a2dp_get_decoder_latency();
+
+    if (a2dp.audio_sink_session_setup_complete(system_latency) == 0) {
+        is_complete = true;
+    }
+    return is_complete;
+}
+
+int audio_extn_a2dp_start_capture()
+{
+    int ret = 0;
+
+    ALOGD("audio_extn_a2dp_start_capture start");
+
+    if(!(a2dp.bt_lib_sink_handle && a2dp.audio_sink_start
+       && a2dp.audio_get_dec_config)) {
+        ALOGE("a2dp handle is not identified, Ignoring start capture request");
+        return -ENOSYS;
+    }
+
+    if (!a2dp.a2dp_sink_started && !a2dp.a2dp_sink_total_active_session_requests) {
+        ALOGD("calling BT module stream start");
+        /* This call indicates BT IPC lib to start capture */
+        ret =  a2dp.audio_sink_start();
+        ALOGE("BT controller start capture return = %d",ret);
+        if (ret != 0 ) {
+           ALOGE("BT controller start capture failed");
+           a2dp.a2dp_sink_started = false;
+        } else {
+
+           if(!audio_extn_a2dp_sink_is_ready()) {
+                ALOGD("Wait for capture ready not successful");
+                ret = -ETIMEDOUT;
+           }
+
+           if(configure_a2dp_sink_decoder_format() == true) {
+                a2dp.a2dp_sink_started = true;
+                ret = 0;
+                ALOGD("Start capture successful to BT library");
+           } else {
+                ALOGD(" unable to configure DSP decoder");
+                a2dp.a2dp_sink_started = false;
+                ret = -ETIMEDOUT;
+           }
+
+           if (!a2dp_send_sink_setup_complete()) {
+               ALOGD("sink_setup_complete not successful");
+               ret = -ETIMEDOUT;
+           }
+        }
+    }
+
+    if (a2dp.a2dp_sink_started) {
+        if (a2dp_set_backend_cfg(SINK) == true) {
+        	a2dp.a2dp_sink_total_active_session_requests++;
+        }
+    }
+
+    ALOGD("start A2DP sink total active sessions :%d",
+          a2dp.a2dp_sink_total_active_session_requests);
     return ret;
 }
 
@@ -1890,16 +2324,16 @@
     ctl_enc_config = mixer_get_ctl_by_name(a2dp.adev->mixer,
                                            MIXER_ENC_CONFIG_BLOCK);
     if (!ctl_enc_config) {
-        ALOGE(" ERROR  a2dp encoder format mixer control not identifed");
+        ALOGE(" ERROR  a2dp encoder format mixer control not identified");
     } else {
         ret = mixer_ctl_set_array(ctl_enc_config, (void *)&dummy_reset_config,
                                         sizeof(struct sbc_enc_cfg_t));
-         a2dp.bt_encoder_format = ENC_MEDIA_FMT_NONE;
+         a2dp.bt_encoder_format = MEDIA_FMT_NONE;
     }
     ctrl_bit_format = mixer_get_ctl_by_name(a2dp.adev->mixer,
                                             MIXER_ENC_BIT_FORMAT);
     if (!ctrl_bit_format) {
-        ALOGE(" ERROR  bit format CONFIG data mixer control not identifed");
+        ALOGE(" ERROR  bit format CONFIG data mixer control not identified");
     } else {
         ret = mixer_ctl_set_enum_by_string(ctrl_bit_format, "S16_LE");
         if (ret != 0) {
@@ -1919,14 +2353,14 @@
     }
 }
 
-static int reset_a2dp_dec_config_params()
+static int reset_a2dp_source_dec_config_params()
 {
     struct mixer_ctl *ctl_dec_data = NULL;
     struct abr_dec_cfg_t dummy_reset_cfg;
     int ret = 0;
 
     if (a2dp.abr_config.is_abr_enabled) {
-        ctl_dec_data = mixer_get_ctl_by_name(a2dp.adev->mixer, MIXER_DEC_CONFIG_BLOCK);
+        ctl_dec_data = mixer_get_ctl_by_name(a2dp.adev->mixer, MIXER_SOURCE_DEC_CONFIG_BLOCK);
         if (!ctl_dec_data) {
             ALOGE("%s: ERROR A2DP decoder config mixer control not identifed", __func__);
             return -EINVAL;
@@ -1943,38 +2377,98 @@
     return ret;
 }
 
+static void reset_a2dp_sink_dec_config_params()
+{
+    int ret =0;
+
+    struct mixer_ctl *ctl_dec_config, *ctrl_bit_format;
+    struct aac_dec_cfg_t dummy_reset_config;
+
+    memset(&dummy_reset_config, 0x0, sizeof(struct aac_dec_cfg_t));
+    ctl_dec_config = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                           MIXER_SINK_DEC_CONFIG_BLOCK);
+    if (!ctl_dec_config) {
+        ALOGE(" ERROR  a2dp decoder format mixer control not identified");
+    } else {
+        ret = mixer_ctl_set_array(ctl_dec_config, (void *)&dummy_reset_config,
+                                        sizeof(struct aac_dec_cfg_t));
+         a2dp.bt_decoder_format = MEDIA_FMT_NONE;
+    }
+    ctrl_bit_format = mixer_get_ctl_by_name(a2dp.adev->mixer,
+                                            MIXER_DEC_BIT_FORMAT);
+    if (!ctrl_bit_format) {
+        ALOGE(" ERROR  bit format CONFIG data mixer control not identified");
+    } else {
+        ret = mixer_ctl_set_enum_by_string(ctrl_bit_format, "S16_LE");
+        if (ret != 0) {
+            ALOGE("%s: Failed to set bit format to decoder", __func__);
+        }
+    }
+}
+
 int audio_extn_a2dp_stop_playback()
 {
     int ret =0;
 
     ALOGV("audio_extn_a2dp_stop_playback start");
-    if(!(a2dp.bt_lib_handle && a2dp.audio_stop_stream)) {
-        ALOGE("a2dp handle is not identified, Ignoring start request");
+    if(!(a2dp.bt_lib_source_handle && a2dp.audio_source_stop)) {
+        ALOGE("a2dp handle is not identified, Ignoring stop request");
         return -ENOSYS;
     }
 
-    if (a2dp.a2dp_total_active_session_request > 0)
-        a2dp.a2dp_total_active_session_request--;
+    if (a2dp.a2dp_source_total_active_session_requests > 0)
+        a2dp.a2dp_source_total_active_session_requests--;
 
-    if ( a2dp.a2dp_started && !a2dp.a2dp_total_active_session_request) {
+    if ( a2dp.a2dp_source_started && !a2dp.a2dp_source_total_active_session_requests) {
         ALOGV("calling BT module stream stop");
-        ret = a2dp.audio_stop_stream();
+        ret = a2dp.audio_source_stop();
         if (ret < 0)
             ALOGE("stop stream to BT IPC lib failed");
         else
             ALOGV("stop steam to BT IPC lib successful");
         reset_a2dp_enc_config_params();
-        reset_a2dp_dec_config_params();
-        a2dp_reset_backend_cfg();
+        reset_a2dp_source_dec_config_params();
+        a2dp_reset_backend_cfg(SOURCE);
         if (a2dp.abr_config.is_abr_enabled && a2dp.abr_config.abr_started)
             stop_abr();
         a2dp.abr_config.is_abr_enabled = false;
-        a2dp.a2dp_started = false;
+        a2dp.a2dp_source_started = false;
+        a2dp_reset_backend_cfg(SOURCE);
     }
-    if(!a2dp.a2dp_total_active_session_request)
-       a2dp.a2dp_started = false;
-    ALOGD("Stop A2DP playback total active sessions :%d",
-          a2dp.a2dp_total_active_session_request);
+    if(!a2dp.a2dp_source_total_active_session_requests)
+       a2dp.a2dp_source_started = false;
+    ALOGD("Stop A2DP playback, total active sessions :%d",
+          a2dp.a2dp_source_total_active_session_requests);
+    return 0;
+}
+
+int audio_extn_a2dp_stop_capture()
+{
+    int ret =0;
+
+    ALOGV("audio_extn_a2dp_stop_capture start");
+    if(!(a2dp.bt_lib_sink_handle && a2dp.audio_sink_stop)) {
+        ALOGE("a2dp handle is not identified, Ignoring stop request");
+        return -ENOSYS;
+    }
+
+    if (a2dp.a2dp_sink_total_active_session_requests > 0)
+        a2dp.a2dp_sink_total_active_session_requests--;
+
+    if ( a2dp.a2dp_sink_started && !a2dp.a2dp_sink_total_active_session_requests) {
+        ALOGV("calling BT module stream stop");
+        ret = a2dp.audio_sink_stop();
+        if (ret < 0)
+            ALOGE("stop stream to BT IPC lib failed");
+        else
+            ALOGV("stop steam to BT IPC lib successful");
+        reset_a2dp_sink_dec_config_params();
+        a2dp_reset_backend_cfg(SINK);
+    }
+    if(!a2dp.a2dp_sink_total_active_session_requests)
+       a2dp.a2dp_source_started = false;
+    ALOGD("Stop A2DP capture, total active sessions :%d",
+          a2dp.a2dp_sink_total_active_session_requests);
     return 0;
 }
 
@@ -1986,7 +2480,7 @@
      struct listnode *node;
 
      if(a2dp.is_a2dp_offload_supported == false) {
-        ALOGV("no supported encoders identified,ignoring a2dp setparam");
+        ALOGV("no supported codecs identified,ignoring a2dp setparam");
         return;
      }
 
@@ -1995,8 +2489,8 @@
      if (ret >= 0) {
          val = atoi(value);
          if (audio_is_a2dp_out_device(val)) {
-             ALOGV("Received device connect request for A2DP");
-             open_a2dp_output();
+             ALOGV("Received device connect request for A2DP source");
+             open_a2dp_source();
          }
          goto param_handled;
      }
@@ -2007,15 +2501,20 @@
      if (ret >= 0) {
          val = atoi(value);
          if (audio_is_a2dp_out_device(val)) {
-             ALOGV("Received device dis- connect request");
-             reset_a2dp_enc_config_params();
-             reset_a2dp_dec_config_params();
+             ALOGV("Received source device dis- connect request");
              close_a2dp_output();
-             a2dp_reset_backend_cfg();
+             reset_a2dp_enc_config_params();
+             reset_a2dp_source_dec_config_params();
+             a2dp_reset_backend_cfg(SOURCE);
+         } else if (audio_is_a2dp_in_device(val)) {
+             ALOGV("Received sink device dis- connect request");
+             close_a2dp_input();
+             reset_a2dp_sink_dec_config_params();
+             a2dp_reset_backend_cfg(SINK);
          }
          goto param_handled;
      }
-
+#ifndef LINUX_ENABLED
      ret = str_parms_get_str(parms, "TwsChannelConfig", value, sizeof(value));
      if (ret>=0) {
          ALOGD("Setting tws channel mode to %s",value);
@@ -2026,14 +2525,14 @@
          audio_a2dp_update_tws_channel_mode();
      goto param_handled;
      }
-
+#endif
      ret = str_parms_get_str(parms, "A2dpSuspended", value, sizeof(value));
      if (ret >= 0) {
-         if (a2dp.bt_lib_handle) {
+         if (a2dp.bt_lib_source_handle) {
              if ((!strncmp(value,"true",sizeof(value)))) {
                 ALOGD("Setting a2dp to suspend state");
-                a2dp.a2dp_suspended = true;
-                if (a2dp.bt_state == A2DP_STATE_DISCONNECTED)
+                a2dp.a2dp_source_suspended = true;
+                if (a2dp.bt_state_source == A2DP_STATE_DISCONNECTED)
                     goto param_handled;
                 list_for_each(node, &a2dp.adev->usecase_list) {
                     uc_info = node_to_item(node, struct audio_usecase, list);
@@ -2045,16 +2544,16 @@
                     }
                 }
                 reset_a2dp_enc_config_params();
-                reset_a2dp_dec_config_params();
-                if(a2dp.audio_suspend_stream)
-                   a2dp.audio_suspend_stream();
-            } else if (a2dp.a2dp_suspended == true) {
+                reset_a2dp_source_dec_config_params();
+                if(a2dp.audio_source_suspend)
+                   a2dp.audio_source_suspend();
+            } else if (a2dp.a2dp_source_suspended == true) {
                 ALOGD("Resetting a2dp suspend state");
                 struct audio_usecase *uc_info;
                 struct listnode *node;
-                if(a2dp.clear_a2dpsuspend_flag)
-                    a2dp.clear_a2dpsuspend_flag();
-                a2dp.a2dp_suspended = false;
+                if(a2dp.clear_source_a2dpsuspend_flag)
+                    a2dp.clear_source_a2dpsuspend_flag();
+                a2dp.a2dp_source_suspended = false;
                 /*
                  * It is possible that before suspend,a2dp sessions can be active
                  * for example during music + voice activation concurrency
@@ -2066,13 +2565,13 @@
                  * Fix is to call a2dp start for IPC library post suspend
                  * based on number of active session count
                  */
-                if (a2dp.a2dp_total_active_session_request > 0) {
+                if (a2dp.a2dp_source_total_active_session_requests > 0) {
                     ALOGD(" Calling IPC lib start post suspend state");
-                    if(a2dp.audio_start_stream) {
-                        ret =  a2dp.audio_start_stream();
+                    if(a2dp.audio_source_start) {
+                        ret =  a2dp.audio_source_start();
                         if (ret != 0) {
                             ALOGE("BT controller start failed");
-                            a2dp.a2dp_started = false;
+                            a2dp.a2dp_source_started = false;
                         }
                     }
                 }
@@ -2103,44 +2602,59 @@
     //During encoder reconfiguration mode, force a2dp device switch
     // Or if a2dp device is selected but earlier start failed ( as a2dp
     // was suspended, force retry.
-    return a2dp.is_handoff_in_progress || !a2dp.a2dp_started;
+    return a2dp.is_handoff_in_progress || !a2dp.a2dp_source_started;
 }
 
-void audio_extn_a2dp_get_sample_rate(int *sample_rate)
+void audio_extn_a2dp_get_enc_sample_rate(int *sample_rate)
 {
     *sample_rate = a2dp.enc_sampling_rate;
 }
 
-bool audio_extn_a2dp_is_ready()
+void audio_extn_a2dp_get_dec_sample_rate(int *sample_rate)
+{
+    *sample_rate = a2dp.dec_sampling_rate;
+}
+
+bool audio_extn_a2dp_source_is_ready()
 {
     bool ret = false;
 
-    if (a2dp.a2dp_suspended)
+    if (a2dp.a2dp_source_suspended)
         return ret;
 
-    if ((a2dp.bt_state != A2DP_STATE_DISCONNECTED) &&
+    if ((a2dp.bt_state_source != A2DP_STATE_DISCONNECTED) &&
         (a2dp.is_a2dp_offload_supported) &&
-        (a2dp.audio_check_a2dp_ready))
-           ret = a2dp.audio_check_a2dp_ready();
+        (a2dp.audio_source_check_a2dp_ready))
+           ret = a2dp.audio_source_check_a2dp_ready();
     return ret;
 }
 
-bool audio_extn_a2dp_is_suspended()
+bool audio_extn_a2dp_sink_is_ready()
 {
-    return a2dp.a2dp_suspended;
+    bool ret = false;
+
+    if ((a2dp.bt_state_sink != A2DP_STATE_DISCONNECTED) &&
+        (a2dp.is_a2dp_offload_supported) &&
+        (a2dp.audio_sink_check_a2dp_ready))
+           ret = a2dp.audio_sink_check_a2dp_ready();
+    return ret;
+}
+
+bool audio_extn_a2dp_source_is_suspended()
+{
+    return a2dp.a2dp_source_suspended;
 }
 
 void audio_extn_a2dp_init (void *adev)
 {
   a2dp.adev = (struct audio_device*)adev;
-  a2dp.bt_lib_handle = NULL;
-  a2dp.a2dp_started = false;
-  a2dp.bt_state = A2DP_STATE_DISCONNECTED;
-  a2dp.a2dp_total_active_session_request = 0;
-  a2dp.a2dp_suspended = false;
-  a2dp.bt_encoder_format = ENC_CODEC_TYPE_INVALID;
+  a2dp.bt_lib_source_handle = NULL;
+  a2dp.a2dp_source_started = false;
+  a2dp.bt_state_source = A2DP_STATE_DISCONNECTED;
+  a2dp.a2dp_source_total_active_session_requests = 0;
+  a2dp.a2dp_source_suspended = false;
+  a2dp.bt_encoder_format = CODEC_TYPE_INVALID;
   a2dp.enc_sampling_rate = 48000;
-  a2dp.is_a2dp_offload_supported = false;
   a2dp.is_handoff_in_progress = false;
   a2dp.is_aptx_dual_mono_supported = false;
   a2dp.is_aptx_adaptive = false;
@@ -2150,7 +2664,16 @@
   a2dp.abr_config.abr_tx_handle = NULL;
   a2dp.is_tws_mono_mode_on = false;
   reset_a2dp_enc_config_params();
-  reset_a2dp_dec_config_params();
+  reset_a2dp_source_dec_config_params();
+  reset_a2dp_sink_dec_config_params();
+
+  a2dp.bt_lib_sink_handle = NULL;
+  a2dp.a2dp_sink_started = false;
+  a2dp.bt_state_sink = A2DP_STATE_DISCONNECTED;
+  a2dp.a2dp_sink_total_active_session_requests = 0;
+  open_a2dp_sink();
+
+  a2dp.is_a2dp_offload_supported = false;
   update_offload_codec_capabilities();
 }
 
@@ -2173,32 +2696,32 @@
     }
 
     uint32_t slatency = 0;
-    if (a2dp.audio_get_a2dp_sink_latency && a2dp.bt_state != A2DP_STATE_DISCONNECTED) {
-        slatency = a2dp.audio_get_a2dp_sink_latency();
+    if (a2dp.audio_sink_get_a2dp_latency && a2dp.bt_state_source != A2DP_STATE_DISCONNECTED) {
+        slatency = a2dp.audio_sink_get_a2dp_latency();
     }
 
     switch(a2dp.bt_encoder_format) {
-        case ENC_CODEC_TYPE_SBC:
+        case CODEC_TYPE_SBC:
             latency = (avsync_runtime_prop > 0) ? sbc_offset : ENCODER_LATENCY_SBC;
             latency += (slatency <= 0) ? DEFAULT_SINK_LATENCY_SBC : slatency;
             break;
-        case ENC_CODEC_TYPE_APTX:
+        case CODEC_TYPE_APTX:
             latency = (avsync_runtime_prop > 0) ? aptx_offset : ENCODER_LATENCY_APTX;
             latency += (slatency <= 0) ? DEFAULT_SINK_LATENCY_APTX : slatency;
             break;
-        case ENC_CODEC_TYPE_APTX_HD:
+        case CODEC_TYPE_APTX_HD:
             latency = (avsync_runtime_prop > 0) ? aptxhd_offset : ENCODER_LATENCY_APTX_HD;
             latency += (slatency <= 0) ? DEFAULT_SINK_LATENCY_APTX_HD : slatency;
             break;
-        case ENC_CODEC_TYPE_AAC:
+        case CODEC_TYPE_AAC:
             latency = (avsync_runtime_prop > 0) ? aac_offset : ENCODER_LATENCY_AAC;
             latency += (slatency <= 0) ? DEFAULT_SINK_LATENCY_AAC : slatency;
             break;
-        case ENC_CODEC_TYPE_CELT:
+        case CODEC_TYPE_CELT:
             latency = (avsync_runtime_prop > 0) ? celt_offset : ENCODER_LATENCY_CELT;
             latency += (slatency <= 0) ? DEFAULT_SINK_LATENCY_CELT : slatency;
             break;
-        case ENC_CODEC_TYPE_LDAC:
+        case CODEC_TYPE_LDAC:
             latency = (avsync_runtime_prop > 0) ? ldac_offset : ENCODER_LATENCY_LDAC;
             latency += (slatency <= 0) ? DEFAULT_SINK_LATENCY_LDAC : slatency;
             break;