hal: post_proc: add volume based audio calibration support
- add new effect module to listen to volume and device change
- based on volume levels of all streams active over speaker
compute gain based calibration level and communicate
with audio HAL to send the same to ACDB loader
Change-Id: I27294dee3b757a3e7999a62f4f538b59d91c2e58
diff --git a/post_proc/Android.mk b/post_proc/Android.mk
index be70166..71a210f 100644
--- a/post_proc/Android.mk
+++ b/post_proc/Android.mk
@@ -68,3 +68,32 @@
include $(BUILD_STATIC_LIBRARY)
endif
+
+
+################################################################################
+
+ifneq ($(filter msm8992 msm8994 msm8996 msm8952,$(TARGET_BOARD_PLATFORM)),)
+
+include $(CLEAR_VARS)
+
+LOCAL_CFLAGS := -DLIB_AUDIO_HAL="/system/lib/hw/audio.primary."$(TARGET_BOARD_PLATFORM)".so"
+
+LOCAL_SRC_FILES:= \
+ volume_listener.c
+
+LOCAL_CFLAGS+= -O2 -fvisibility=hidden
+
+LOCAL_SHARED_LIBRARIES := \
+ libcutils \
+ liblog \
+ libdl
+
+LOCAL_MODULE_RELATIVE_PATH := soundfx
+LOCAL_MODULE:= libvolumelistener
+
+LOCAL_C_INCLUDES := \
+ $(call include-path-for, audio-effects)
+
+include $(BUILD_SHARED_LIBRARY)
+
+endif
diff --git a/post_proc/volume_listener.c b/post_proc/volume_listener.c
new file mode 100644
index 0000000..51f8803
--- /dev/null
+++ b/post_proc/volume_listener.c
@@ -0,0 +1,769 @@
+/*
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of The Linux Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define LOG_TAG "volume_listener"
+//#define LOG_NDEBUG 0
+#include <stdlib.h>
+#include <dlfcn.h>
+
+#include <cutils/list.h>
+#include <cutils/log.h>
+#include <hardware/audio_effect.h>
+#include <cutils/properties.h>
+
+#define PRIMARY_HAL_PATH XSTR(LIB_AUDIO_HAL)
+#define XSTR(x) STR(x)
+#define STR(x) #x
+
+#define VOL_FLAG ( EFFECT_FLAG_TYPE_INSERT | \
+ EFFECT_FLAG_VOLUME_IND | \
+ EFFECT_FLAG_DEVICE_IND | \
+ EFFECT_FLAG_OFFLOAD_SUPPORTED)
+
+#define PRINT_STREAM_TYPE(i) ALOGV("descriptor found and is of stream type %s ",\
+ i == MUSIC?"MUSIC": \
+ i == RING?"RING": \
+ i == ALARM?"ALARM": \
+ i == VOICE_CALL?"Voice_call": \
+ i == NOTIFICATION?"Notification":\
+ "--INVALID--"); \
+
+#define MAX_GAIN_LEVELS 5
+
+#define AHAL_GAIN_DEPENDENT_INTERFACE_FUNCTION "audio_hw_send_gain_dep_calibration"
+
+enum {
+ VOL_LISTENER_STATE_UNINITIALIZED,
+ VOL_LISTENER_STATE_INITIALIZED,
+ VOL_LISTENER_STATE_ACTIVE,
+};
+
+typedef struct vol_listener_context_s vol_listener_context_t;
+static const struct effect_interface_s effect_interface;
+
+/* flag to avoid multiple initialization */
+static bool initialized = false;
+
+/* current gain dep cal level that was pushed succesfully */
+static int current_gain_dep_cal_level = -1;
+
+enum STREAM_TYPE {
+ MUSIC,
+ RING,
+ ALARM,
+ VOICE_CALL,
+ NOTIFICATION,
+ MAX_STREAM_TYPES,
+};
+
+struct vol_listener_context_s {
+ const struct effect_interface_s *itfe;
+ struct listnode effect_list_node;
+ effect_config_t config;
+ const effect_descriptor_t *desc;
+ uint32_t stream_type;
+ uint32_t session_id;
+ uint32_t state;
+ uint32_t dev_id;
+ float left_vol;
+ float right_vol;
+};
+
+/* volume listener, music UUID: 08b8b058-0590-11e5-ac71-0025b32654a0 */
+const effect_descriptor_t vol_listener_music_descriptor = {
+ { 0x08b8b058, 0x0590, 0x11e5, 0xac71, { 0x00, 0x25, 0xb3, 0x26, 0x54, 0xa0 } }, // type
+ { 0x08b8b058, 0x0590, 0x11e5, 0xac71, { 0x00, 0x25, 0xb3, 0x26, 0x54, 0xa0 } }, // uuid
+ EFFECT_CONTROL_API_VERSION,
+ VOL_FLAG,
+ 0, /* TODO */
+ 1,
+ "Volume listener for Music",
+ "Qualcomm Technologies Inc.",
+};
+
+/* volume listener, ring UUID: 0956df94-0590-11e5-bdbe-0025b32654a0 */
+const effect_descriptor_t vol_listener_ring_descriptor = {
+ { 0x0956df94, 0x0590, 0x11e5, 0xbdbe, { 0x00, 0x25, 0xb3, 0x26, 0x54, 0xa0 } }, // type
+ { 0x0956df94, 0x0590, 0x11e5, 0xbdbe, { 0x00, 0x25, 0xb3, 0x26, 0x54, 0xa0 } }, // uuid
+ EFFECT_CONTROL_API_VERSION,
+ VOL_FLAG,
+ 0, /* TODO */
+ 1,
+ "Volume listener for ring",
+ "Qualcomm Technologies Inc",
+};
+
+/* volume listener, alarm UUID: 09f303e2-0590-11e5-8fdb-0025b32654a0 */
+const effect_descriptor_t vol_listener_alarm_descriptor = {
+ { 0x09f303e2, 0x0590, 0x11e5, 0x8fdb, { 0x00, 0x25, 0xb3, 0x26, 0x54, 0xa0 } }, // type
+ { 0x09f303e2, 0x0590, 0x11e5, 0x8fdb, { 0x00, 0x25, 0xb3, 0x26, 0x54, 0xa0 } }, // uuid
+ EFFECT_CONTROL_API_VERSION,
+ VOL_FLAG,
+ 0, /* TODO */
+ 1,
+ "Volume listener for alarm",
+ "Qualcomm Technologies Inc",
+};
+
+/* volume listener, voice call UUID: 0ace5c08-0590-11e5-ae9e-0025b32654a0 */
+const effect_descriptor_t vol_listener_voice_call_descriptor = {
+ { 0x0ace5c08, 0x0590, 0x11e5, 0xae9e, { 0x00, 0x25, 0xb3, 0x26, 0x54, 0xa0 } }, // type
+ { 0x0ace5c08, 0x0590, 0x11e5, 0xae9e, { 0x00, 0x25, 0xb3, 0x26, 0x54, 0xa0 } }, // uuid
+ EFFECT_CONTROL_API_VERSION,
+ VOL_FLAG,
+ 0, /* TODO */
+ 1,
+ "Volume listener for voice call",
+ "Qualcomm Technologies Inc",
+};
+
+/* volume listener, notification UUID: 0b776dde-0590-11e5-81ba-0025b32654a0 */
+const effect_descriptor_t vol_listener_notification_descriptor = {
+ { 0x0b776dde, 0x0590, 0x11e5, 0x81ba, { 0x00, 0x25, 0xb3, 0x26, 0x54, 0xa0 } }, // type
+ { 0x0b776dde, 0x0590, 0x11e5, 0x81ba, { 0x00, 0x25, 0xb3, 0x26, 0x54, 0xa0 } }, // uuid
+ EFFECT_CONTROL_API_VERSION,
+ VOL_FLAG,
+ 0, /* TODO */
+ 1,
+ "Volume listener for notification",
+ "Qualcomm Technologies Inc",
+};
+
+struct amp_db_and_gain_table {
+ float amp;
+ float db;
+ uint32_t level;
+} amp_to_dBLevel_table;
+
+// using gain level for non-drc volume curve
+static const struct amp_db_and_gain_table volume_curve_gain_mapping_table[MAX_GAIN_LEVELS] = {
+ /* Level 0 in the calibration database contains default calibration */
+ { 0.001774, -55, 5 },
+ { 0.501187, -6, 4 },
+ { 0.630957, -4, 3 },
+ { 0.794328, -2, 2 },
+ { 1.0, 0, 1 },
+};
+
+static const effect_descriptor_t *descriptors[] = {
+ &vol_listener_music_descriptor,
+ &vol_listener_ring_descriptor,
+ &vol_listener_alarm_descriptor,
+ &vol_listener_voice_call_descriptor,
+ &vol_listener_notification_descriptor,
+ NULL,
+};
+
+pthread_once_t once = PTHREAD_ONCE_INIT;
+/* flag to indicate if init was success */
+static int init_status;
+
+/* current volume level for which gain dep cal level was selected */
+static float current_vol = 0.0;
+
+/* HAL interface to send calibration */
+static bool (*send_gain_dep_cal)(int);
+
+/* if dumping allowed */
+static bool dumping_enabled = false;
+
+/* list of created effects. */
+struct listnode vol_effect_list;
+
+/* lock must be held when modifying or accessing created_effects_list */
+pthread_mutex_t vol_listner_init_lock;
+
+/*
+ * Local functions
+ */
+static void dump_list_l()
+{
+ struct listnode *node;
+ vol_listener_context_t *context;
+
+ ALOGW("DUMP_START :: ===========");
+
+ list_for_each(node, &vol_effect_list) {
+ context = node_to_item(node, struct vol_listener_context_s, effect_list_node);
+ // dump stream_type / Device / session_id / left / righ volume
+ ALOGW("%s: streamType [%s] Device [%d] state [%d] sessionID [%d] volume (L/R) [%f / %f] ",
+ __func__,
+ context->stream_type == MUSIC ? "MUSIC" :
+ context->stream_type == RING ? "RING" :
+ context->stream_type == ALARM ? "ALARM" :
+ context->stream_type == VOICE_CALL ? "VOICE_CALL" :
+ context->stream_type == NOTIFICATION ? "NOTIFICATION" : "--INVALID--",
+ context->dev_id, context->state, context->session_id, context->left_vol,context->right_vol);
+ }
+
+ ALOGW("DUMP_END :: ===========");
+}
+
+static void check_and_set_gain_dep_cal()
+{
+ // iterate through list and make decision to set new gain dep cal level for speaker device
+ // 1. find all usecase active on speaker
+ // 2. find average of left and right for each usecase
+ // 3. find the highest of all the active usecase
+ // 4. if new value is different than the current value then load new calibration
+
+ struct listnode *node = NULL;
+ float new_vol = 0.0;
+ int max_level = 0;
+ vol_listener_context_t *context = NULL;
+ if (dumping_enabled) {
+ dump_list_l();
+ }
+
+ ALOGV("%s ==> Start ...", __func__);
+
+ // select the highest volume on speaker device
+ list_for_each(node, &vol_effect_list) {
+ context = node_to_item(node, struct vol_listener_context_s, effect_list_node);
+ if ((context->state == VOL_LISTENER_STATE_ACTIVE) &&
+ (context->dev_id & AUDIO_DEVICE_OUT_SPEAKER) &&
+ (new_vol < (context->left_vol + context->right_vol) / 2)) {
+ new_vol = (context->left_vol + context->right_vol) / 2;
+ }
+ }
+
+ if (new_vol != current_vol) {
+ ALOGV("%s:: Change in decision :: current volume is %f new volume is %f",
+ __func__, current_vol, new_vol);
+
+ if (send_gain_dep_cal != NULL) {
+ // send Gain dep cal level
+ int gain_dep_cal_level = -1;
+
+ if (new_vol >= 1) { // max amplitude, use highest DRC level
+ gain_dep_cal_level = volume_curve_gain_mapping_table[MAX_GAIN_LEVELS - 1].level;
+ } else if (new_vol <= 0) {
+ gain_dep_cal_level = volume_curve_gain_mapping_table[0].level;
+ } else {
+ for (max_level = 0; max_level + 1 < MAX_GAIN_LEVELS; max_level++) {
+ if (new_vol < volume_curve_gain_mapping_table[max_level + 1].amp &&
+ new_vol >= volume_curve_gain_mapping_table[max_level].amp) {
+ gain_dep_cal_level = volume_curve_gain_mapping_table[max_level].level;
+ ALOGV("%s: volume(%f), gain dep cal selcetd %d ",
+ __func__, current_vol, gain_dep_cal_level);
+ break;
+ }
+ }
+ }
+
+ // check here if previous gain dep cal level was not same
+ if (gain_dep_cal_level != -1) {
+ if (gain_dep_cal_level != current_gain_dep_cal_level) {
+ // decision made .. send new level now
+ if (!send_gain_dep_cal(gain_dep_cal_level)) {
+ ALOGE("%s: Failed to set gain dep cal level", __func__);
+ } else {
+ // Success in setting the gain dep cal level, store new level and Volume
+ if (dumping_enabled) {
+ ALOGW("%s: (old/new) Volume (%f/%f) (old/new) level (%d/%d)",
+ __func__, current_vol, new_vol, current_gain_dep_cal_level,
+ gain_dep_cal_level);
+ } else {
+ ALOGV("%s: Change in Cal::(old/new) Volume (%f/%f) (old/new) level (%d/%d)",
+ __func__, current_vol, new_vol, current_gain_dep_cal_level,
+ gain_dep_cal_level);
+ }
+ current_gain_dep_cal_level = gain_dep_cal_level;
+ current_vol = new_vol;
+ }
+ } else {
+ if (dumping_enabled) {
+ ALOGW("%s: volume changed but gain dep cal level is still the same",
+ __func__);
+ } else {
+ ALOGV("%s: volume changed but gain dep cal level is still the same",
+ __func__);
+ }
+ }
+ } else {
+ ALOGW("%s: Failed to find gain dep cal level for volume %f", __func__, new_vol);
+ }
+ } else {
+ ALOGE("%s: not able to send calibration, NULL function pointer",
+ __func__);
+ }
+ } else {
+ ALOGV("%s:: volume not changed, stick to same config ..... ", __func__);
+ }
+
+ ALOGV("check_and_set_gain_dep_cal ==> End ");
+}
+
+/*
+ * Effect Control Interface Implementation
+ */
+
+static int vol_effect_process(effect_handle_t self,
+ audio_buffer_t *in_buffer,
+ audio_buffer_t *out_buffer)
+{
+ int status = 0;
+ ALOGV("%s Called ", __func__);
+
+ vol_listener_context_t *context = (vol_listener_context_t *)self;
+ pthread_mutex_lock(&vol_listner_init_lock);
+
+ if (context->state != VOL_LISTENER_STATE_ACTIVE) {
+ ALOGE("%s: state is not active .. return error", __func__);
+ status = -EINVAL;
+ goto exit;
+ }
+
+ // calculation based on channel count 2
+ if (in_buffer->raw != out_buffer->raw) {
+ memcpy(out_buffer->raw, in_buffer->raw, out_buffer->frameCount * 2 * sizeof(int16_t));
+ } else {
+ ALOGW("%s: something wrong, didn't handle in_buffer and out_buffer same address case",
+ __func__);
+ }
+
+exit:
+ pthread_mutex_unlock(&vol_listner_init_lock);
+ return status;
+}
+
+
+static int vol_effect_command(effect_handle_t self,
+ uint32_t cmd_code, uint32_t cmd_size,
+ void *p_cmd_data, uint32_t *reply_size,
+ void *p_reply_data)
+{
+ vol_listener_context_t *context = (vol_listener_context_t *)self;
+ int status = 0;
+
+ ALOGV("%s Called ", __func__);
+ pthread_mutex_lock(&vol_listner_init_lock);
+
+ if (context == NULL || context->state == VOL_LISTENER_STATE_UNINITIALIZED) {
+ ALOGE("%s: %s is NULL", __func__, (context == NULL) ?
+ "context" : "context->state");
+ status = -EINVAL;
+ goto exit;
+ }
+
+ switch (cmd_code) {
+ case EFFECT_CMD_INIT:
+ ALOGV("%s :: cmd called EFFECT_CMD_INIT", __func__);
+ if (p_reply_data == NULL || *reply_size != sizeof(int)) {
+ ALOGE("%s: EFFECT_CMD_INIT: %s, sending -EINVAL", __func__,
+ (p_reply_data == NULL) ? "p_reply_data is NULL" :
+ "*reply_size != sizeof(int)");
+ return -EINVAL;
+ }
+ *(int *)p_reply_data = 0;
+ break;
+
+ case EFFECT_CMD_SET_CONFIG:
+ ALOGV("%s :: cmd called EFFECT_CMD_SET_CONFIG", __func__);
+ break;
+
+ case EFFECT_CMD_GET_CONFIG:
+ ALOGV("%s :: cmd called EFFECT_CMD_GET_CONFIG", __func__);
+ break;
+
+ case EFFECT_CMD_RESET:
+ ALOGV("%s :: cmd called EFFECT_CMD_RESET", __func__);
+ break;
+
+ case EFFECT_CMD_SET_AUDIO_MODE:
+ ALOGV("%s :: cmd called EFFECT_CMD_SET_AUDIO_MODE", __func__);
+ break;
+
+ case EFFECT_CMD_OFFLOAD:
+ ALOGV("%s :: cmd called EFFECT_CMD_OFFLOAD", __func__);
+ if (p_reply_data == NULL || *reply_size != sizeof(int)) {
+ ALOGE("%s: EFFECT_CMD_OFFLOAD: %s, sending -EINVAL", __func__,
+ (p_reply_data == NULL) ? "p_reply_data is NULL" :
+ "*reply_size != sizeof(int)");
+ return -EINVAL;
+ }
+ *(int *)p_reply_data = 0;
+ break;
+
+ case EFFECT_CMD_ENABLE:
+ ALOGV("%s :: cmd called EFFECT_CMD_ENABLE", __func__);
+ if (p_reply_data == NULL || *reply_size != sizeof(int)) {
+ ALOGE("%s: EFFECT_CMD_ENABLE: %s, sending -EINVAL", __func__,
+ (p_reply_data == NULL) ? "p_reply_data is NULL" :
+ "*reply_size != sizeof(int)");
+ status = -EINVAL;
+ goto exit;
+ }
+
+ if (context->state != VOL_LISTENER_STATE_INITIALIZED) {
+ ALOGE("%s: EFFECT_CMD_ENABLE : state not INITIALIZED", __func__);
+ status = -ENOSYS;
+ goto exit;
+ }
+
+ context->state = VOL_LISTENER_STATE_ACTIVE;
+ *(int *)p_reply_data = 0;
+
+ // After changing the state and if device is speaker
+ // recalculate gain dep cal level
+ if (context->dev_id & AUDIO_DEVICE_OUT_SPEAKER) {
+ check_and_set_gain_dep_cal();
+ }
+
+ break;
+
+ case EFFECT_CMD_DISABLE:
+ ALOGV("%s :: cmd called EFFECT_CMD_DISABLE", __func__);
+ if (p_reply_data == NULL || *reply_size != sizeof(int)) {
+ ALOGE("%s: EFFECT_CMD_DISABLE: %s, sending -EINVAL", __func__,
+ (p_reply_data == NULL) ? "p_reply_data is NULL" :
+ "*reply_size != sizeof(int)");
+ status = -EINVAL;
+ goto exit;
+ }
+
+ if (context->state != VOL_LISTENER_STATE_ACTIVE) {
+ ALOGE("%s: EFFECT_CMD_ENABLE : state not ACTIVE", __func__);
+ status = -ENOSYS;
+ goto exit;
+ }
+
+ context->state = VOL_LISTENER_STATE_INITIALIZED;
+ *(int *)p_reply_data = 0;
+
+ // After changing the state and if device is speaker
+ // recalculate gain dep cal level
+ if (context->dev_id & AUDIO_DEVICE_OUT_SPEAKER) {
+ check_and_set_gain_dep_cal();
+ }
+
+ break;
+
+ case EFFECT_CMD_GET_PARAM:
+ ALOGV("%s :: cmd called EFFECT_CMD_GET_PARAM", __func__);
+ break;
+
+ case EFFECT_CMD_SET_PARAM:
+ ALOGV("%s :: cmd called EFFECT_CMD_SET_PARAM", __func__);
+ break;
+
+ case EFFECT_CMD_SET_DEVICE:
+ {
+ uint32_t new_device;
+ bool recompute_gain_dep_cal_Level = false;
+ ALOGV("cmd called EFFECT_CMD_SET_DEVICE ");
+
+ if (p_cmd_data == NULL) {
+ ALOGE("%s: EFFECT_CMD_SET_DEVICE: cmd data NULL", __func__);
+ status = -EINVAL;
+ goto exit;
+ }
+
+ new_device = *(uint32_t *)p_cmd_data;
+ ALOGV("%s :: EFFECT_CMD_SET_DEVICE: (current/new) device (0x%x / 0x%x)",
+ __func__, context->dev_id, new_device);
+
+ // check if old or new device is speaker
+ if ((context->dev_id & AUDIO_DEVICE_OUT_SPEAKER) ||
+ (new_device & AUDIO_DEVICE_OUT_SPEAKER)) {
+ recompute_gain_dep_cal_Level = true;
+ }
+
+ context->dev_id = new_device;
+
+ if (recompute_gain_dep_cal_Level) {
+ check_and_set_gain_dep_cal();
+ }
+ }
+ break;
+
+ case EFFECT_CMD_SET_VOLUME:
+ {
+ float left_vol = 0, right_vol = 0;
+ bool recompute_gain_dep_cal_Level = false;
+
+ ALOGV("cmd called EFFECT_CMD_SET_VOLUME");
+ if (p_cmd_data == NULL || cmd_size != 2 * sizeof(uint32_t)) {
+ ALOGE("%s: EFFECT_CMD_SET_VOLUME: %s", __func__, (p_cmd_data == NULL) ?
+ "p_cmd_data is NULL" : "cmd_size issue");
+ status = -EINVAL;
+ goto exit;
+ }
+
+ if (context->dev_id & AUDIO_DEVICE_OUT_SPEAKER) {
+ recompute_gain_dep_cal_Level = true;
+ }
+
+ left_vol = (float)(*(uint32_t *)p_cmd_data) / (1 << 24);
+ right_vol = (float)(*((uint32_t *)p_cmd_data + 1)) / (1 << 24);
+ ALOGV("Current Volume (%f / %f ) new Volume (%f / %f)", context->left_vol,
+ context->right_vol, left_vol, right_vol);
+
+ context->left_vol = left_vol;
+ context->right_vol = right_vol;
+
+ // recompute gan dep cal level only if volume changed on speaker device
+ if (recompute_gain_dep_cal_Level) {
+ check_and_set_gain_dep_cal();
+ }
+ }
+ break;
+
+ default:
+ ALOGW("volume_listener_command invalid command %d", cmd_code);
+ status = -ENOSYS;
+ break;
+ }
+
+exit:
+ pthread_mutex_unlock(&vol_listner_init_lock);
+ return status;
+}
+
+/* Effect Control Interface Implementation: get_descriptor */
+static int vol_effect_get_descriptor(effect_handle_t self,
+ effect_descriptor_t *descriptor)
+{
+ vol_listener_context_t *context = (vol_listener_context_t *)self;
+ ALOGV("%s Called ", __func__);
+
+ if (descriptor == NULL) {
+ ALOGE("%s: descriptor is NULL", __func__);
+ return -EINVAL;
+ }
+
+ *descriptor = *context->desc;
+ return 0;
+}
+
+static void init_once()
+{
+ int i = 0;
+ if (initialized) {
+ ALOGV("%s : already init .. do nothing", __func__);
+ return;
+ }
+
+ ALOGD("%s Called ", __func__);
+ pthread_mutex_init(&vol_listner_init_lock, NULL);
+
+ // get hal function pointer
+ if (access(PRIMARY_HAL_PATH, R_OK) == 0) {
+ void *hal_lib_pointer = dlopen(PRIMARY_HAL_PATH, RTLD_NOW);
+ if (hal_lib_pointer == NULL) {
+ ALOGE("%s: DLOPEN failed for %s", __func__, PRIMARY_HAL_PATH);
+ send_gain_dep_cal = NULL;
+ } else {
+ ALOGV("%s: DLOPEN of %s Succes .. next get HAL entry function", __func__, PRIMARY_HAL_PATH);
+ send_gain_dep_cal = (bool (*)(int))dlsym(hal_lib_pointer, AHAL_GAIN_DEPENDENT_INTERFACE_FUNCTION);
+ if (send_gain_dep_cal == NULL) {
+ ALOGE("Couldnt able to get the function symbol");
+ }
+ }
+ } else {
+ ALOGE("%s: not able to acces lib %s ", __func__, PRIMARY_HAL_PATH);
+ send_gain_dep_cal = NULL;
+ }
+
+ // check system property to see if dumping is required
+ char check_dump_val[PROPERTY_VALUE_MAX];
+ property_get("audio.volume.listener.dump", check_dump_val, "0");
+ if (atoi(check_dump_val)) {
+ dumping_enabled = true;
+ }
+
+ init_status = 0;
+ list_init(&vol_effect_list);
+ initialized = true;
+}
+
+static int lib_init()
+{
+ pthread_once(&once, init_once);
+ ALOGV("%s Called ", __func__);
+ return init_status;
+}
+
+static int vol_prc_lib_create(const effect_uuid_t *uuid,
+ int32_t session_id,
+ int32_t io_id,
+ effect_handle_t *p_handle)
+{
+ int itt = 0;
+ vol_listener_context_t *context = NULL;
+
+ ALOGV("volume_prc_lib_create .. called ..");
+
+ if (lib_init() != 0) {
+ return init_status;
+ }
+
+ if (p_handle == NULL || uuid == NULL) {
+ ALOGE("%s: %s is NULL", __func__, (p_handle == NULL) ? "p_handle" : "uuid");
+ return -EINVAL;
+ }
+
+ context = (vol_listener_context_t *)calloc(1, sizeof(vol_listener_context_t));
+
+ if (context == NULL) {
+ ALOGE("%s: failed to allocate for context .. oops !!", __func__);
+ return -EINVAL;
+ }
+
+ // check if UUID is supported
+ for (itt = 0; descriptors[itt] != NULL; itt++) {
+ if (memcmp(uuid, &descriptors[itt]->uuid, sizeof(effect_uuid_t)) == 0) {
+ // check if this correct .. very imp
+ context->desc = descriptors[itt];
+ context->stream_type = itt;
+ PRINT_STREAM_TYPE(itt)
+ break;
+ }
+ }
+
+ if (descriptors[itt] == NULL) {
+ ALOGE("%s .. couldnt find passed uuid, something wrong", __func__);
+ free(context);
+ return -EINVAL;
+ }
+
+ ALOGV("%s CREATED_CONTEXT %p", __func__, context);
+
+ context->itfe = &effect_interface;
+ context->state = VOL_LISTENER_STATE_INITIALIZED;
+ context->dev_id = AUDIO_DEVICE_NONE;
+ context->session_id = session_id;
+
+ // Add this to master list
+ pthread_mutex_lock(&vol_listner_init_lock);
+ list_add_tail(&vol_effect_list, &context->effect_list_node);
+ if (dumping_enabled) {
+ dump_list_l();
+ }
+ pthread_mutex_unlock(&vol_listner_init_lock);
+
+ *p_handle = (effect_handle_t)context;
+ return 0;
+}
+
+static int vol_prc_lib_release(effect_handle_t handle)
+{
+ struct listnode *node = NULL;
+ vol_listener_context_t *context = NULL;
+ vol_listener_context_t *recv_contex = (vol_listener_context_t *)handle;
+ int status = -1;
+ bool recompute_flag = false;
+ int active_stream_count = 0;
+ ALOGV("%s context %p", __func__, handle);
+ pthread_mutex_lock(&vol_listner_init_lock);
+
+ // check if the handle/context provided is valid
+ list_for_each(node, &vol_effect_list) {
+ context = node_to_item(node, struct vol_listener_context_s, effect_list_node);
+ if ((memcmp(&(context->desc->uuid), &(recv_contex->desc->uuid), sizeof(effect_uuid_t)) == 0)
+ && (context->session_id == recv_contex->session_id)
+ && (context->stream_type == recv_contex->stream_type)) {
+ ALOGV("--- Found something to remove ---");
+ list_remove(&context->effect_list_node);
+ PRINT_STREAM_TYPE(context->stream_type);
+ if (context->dev_id && AUDIO_DEVICE_OUT_SPEAKER) {
+ recompute_flag = true;
+ }
+ free(context);
+ status = 0;
+ } else {
+ ++active_stream_count;
+ }
+ }
+
+ if (status != 0) {
+ ALOGE("something wrong ... <<<--- Found NOTHING to remove ... ???? --->>>>>");
+ }
+
+ // if there are no active streams, reset cal and volume level
+ if (active_stream_count == 0) {
+ current_gain_dep_cal_level = -1;
+ current_vol = 0.0;
+ }
+
+ if (recompute_flag) {
+ check_and_set_gain_dep_cal();
+ }
+
+ if (dumping_enabled) {
+ dump_list_l();
+ }
+ pthread_mutex_unlock(&vol_listner_init_lock);
+ return status;
+}
+
+static int vol_prc_lib_get_descriptor(const effect_uuid_t *uuid,
+ effect_descriptor_t *descriptor)
+{
+ int i = 0;
+ ALOGV("%s Called ", __func__);
+ if (lib_init() != 0) {
+ return init_status;
+ }
+
+ if (descriptor == NULL || uuid == NULL) {
+ ALOGE("%s: %s is NULL", __func__, (descriptor == NULL) ? "descriptor" : "uuid");
+ return -EINVAL;
+ }
+
+ for (i = 0; descriptors[i] != NULL; i++) {
+ if (memcmp(uuid, &descriptors[i]->uuid, sizeof(effect_uuid_t)) == 0) {
+ *descriptor = *descriptors[i];
+ return 0;
+ }
+ }
+
+ ALOGE("%s: couldnt found uuid passed, oops", __func__);
+ return -EINVAL;
+}
+
+
+/* effect_handle_t interface implementation for volume listener effect */
+static const struct effect_interface_s effect_interface = {
+ vol_effect_process,
+ vol_effect_command,
+ vol_effect_get_descriptor,
+ NULL,
+};
+
+__attribute__((visibility("default")))
+audio_effect_library_t AUDIO_EFFECT_LIBRARY_INFO_SYM = {
+ .tag = AUDIO_EFFECT_LIBRARY_TAG,
+ .version = EFFECT_LIBRARY_API_VERSION,
+ .name = "Volume Listener Effect Library",
+ .implementor = "Qualcomm Technologies Inc.",
+ .create_effect = vol_prc_lib_create,
+ .release_effect = vol_prc_lib_release,
+ .get_descriptor = vol_prc_lib_get_descriptor,
+};