diff --git a/modules/usbaudio/Android.mk b/modules/usbaudio/Android.mk
index 446281d..9df1e79 100644
--- a/modules/usbaudio/Android.mk
+++ b/modules/usbaudio/Android.mk
@@ -19,15 +19,12 @@
 LOCAL_MODULE := audio.usb.default
 LOCAL_MODULE_RELATIVE_PATH := hw
 LOCAL_SRC_FILES := \
-	audio_hw.c \
-	alsa_device_profile.c \
-	alsa_device_proxy.c \
-	audio_logging.c \
-	audio_format.c
+	audio_hal.c
 LOCAL_C_INCLUDES += \
 	external/tinyalsa/include \
-	$(call include-path-for, audio-utils)
-LOCAL_SHARED_LIBRARIES := liblog libcutils libtinyalsa libaudioutils
+	$(call include-path-for, audio-utils) \
+	$(call include-path-for, alsa-utils)
+LOCAL_SHARED_LIBRARIES := liblog libcutils libtinyalsa libaudioutils libalsautils
 LOCAL_MODULE_TAGS := optional
 LOCAL_CFLAGS := -Wno-unused-parameter
 
diff --git a/modules/usbaudio/alsa_device_profile.c b/modules/usbaudio/alsa_device_profile.c
deleted file mode 100644
index 141e06b..0000000
--- a/modules/usbaudio/alsa_device_profile.c
+++ /dev/null
@@ -1,498 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "alsa_device_profile"
-/*#define LOG_NDEBUG 0*/
-/*#define LOG_PCM_PARAMS 0*/
-
-#include <errno.h>
-#include <inttypes.h>
-#include <stdint.h>
-#include <stdlib.h>
-
-#include <log/log.h>
-
-#include "alsa_device_profile.h"
-#include "audio_format.h"
-#include "audio_logging.h"
-
-#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
-
-/*TODO - Evaluate if this value should/can be retrieved from a device-specific property */
-#define BUFF_DURATION_MS   5
-
-#define DEFAULT_PERIOD_SIZE 1024
-
-static const char * const format_string_map[] = {
-    "AUDIO_FORMAT_PCM_16_BIT",      /* "PCM_FORMAT_S16_LE", */
-    "AUDIO_FORMAT_PCM_32_BIT",      /* "PCM_FORMAT_S32_LE", */
-    "AUDIO_FORMAT_PCM_8_BIT",       /* "PCM_FORMAT_S8", */
-    "AUDIO_FORMAT_PCM_8_24_BIT",    /* "PCM_FORMAT_S24_LE", */
-    "AUDIO_FORMAT_PCM_24_BIT_PACKED"/* "PCM_FORMAT_S24_3LE" */
-};
-
-static const unsigned const format_byte_size_map[] = {
-    2, /* PCM_FORMAT_S16_LE */
-    4, /* PCM_FORMAT_S32_LE */
-    1, /* PCM_FORMAT_S8 */
-    4, /* PCM_FORMAT_S24_LE */
-    3, /* PCM_FORMAT_S24_3LE */
-};
-
-extern int8_t const pcm_format_value_map[50];
-
-/* sort these highest -> lowest (to default to best quality) */
-static const unsigned std_sample_rates[] =
-    {48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000};
-
-static void profile_reset(alsa_device_profile* profile)
-{
-    profile->card = profile->device = -1;
-
-    /* Fill the attribute arrays with invalid values */
-    size_t index;
-    for (index = 0; index < ARRAY_SIZE(profile->formats); index++) {
-        profile->formats[index] = PCM_FORMAT_INVALID;
-    }
-
-    for (index = 0; index < ARRAY_SIZE(profile->sample_rates); index++) {
-        profile->sample_rates[index] = 0;
-    }
-
-    for (index = 0; index < ARRAY_SIZE(profile->channel_counts); index++) {
-        profile->channel_counts[index] = 0;
-    }
-
-    profile->min_period_size = profile->max_period_size = 0;
-    profile->min_channel_count = profile->max_channel_count = DEFAULT_CHANNEL_COUNT;
-
-    profile->is_valid = false;
-}
-
-void profile_init(alsa_device_profile* profile, int direction)
-{
-    profile->direction = direction;
-    profile_reset(profile);
-}
-
-bool profile_is_initialized(alsa_device_profile* profile)
-{
-    return profile->card >= 0 && profile->device >= 0;
-}
-
-bool profile_is_valid(alsa_device_profile* profile) {
-    return profile->is_valid;
-}
-
-bool profile_is_cached_for(alsa_device_profile* profile, int card, int device) {
-    return card == profile->card && device == profile->device;
-}
-
-void profile_decache(alsa_device_profile* profile) {
-    profile_reset(profile);
-}
-
-/*
- * Returns the supplied value rounded up to the next even multiple of 16
- */
-static unsigned int round_to_16_mult(unsigned int size)
-{
-    return (size + 15) & ~15;   // 0xFFFFFFF0;
-}
-
-/*
- * Returns the system defined minimum period size based on the supplied sample rate.
- */
-unsigned profile_calc_min_period_size(alsa_device_profile* profile, unsigned sample_rate)
-{
-    ALOGV("profile_calc_min_period_size(%p, rate:%d)", profile, sample_rate);
-    if (profile == NULL) {
-        return DEFAULT_PERIOD_SIZE;
-    } else {
-        unsigned num_sample_frames = (sample_rate * BUFF_DURATION_MS) / 1000;
-        if (num_sample_frames < profile->min_period_size) {
-            num_sample_frames = profile->min_period_size;
-        }
-        return round_to_16_mult(num_sample_frames) * 2;
-    }
-}
-
-unsigned int profile_get_period_size(alsa_device_profile* profile, unsigned sample_rate)
-{
-    // return profile->default_config.period_size;
-    unsigned int period_size = profile_calc_min_period_size(profile, sample_rate);
-    ALOGV("profile_get_period_size(rate:%d) = %d", sample_rate, period_size);
-    return period_size;
-}
-
-/*
- * Sample Rate
- */
-unsigned profile_get_default_sample_rate(alsa_device_profile* profile)
-{
-    /*
-     * TODO this won't be right in general. we should store a preferred rate as we are scanning.
-     * But right now it will return the highest rate, which may be correct.
-     */
-    return profile_is_valid(profile) ? profile->sample_rates[0] : DEFAULT_SAMPLE_RATE;
-}
-
-bool profile_is_sample_rate_valid(alsa_device_profile* profile, unsigned rate)
-{
-    if (profile_is_valid(profile)) {
-        size_t index;
-        for (index = 0; profile->sample_rates[index] != 0; index++) {
-            if (profile->sample_rates[index] == rate) {
-                return true;
-            }
-        }
-
-        return false;
-    } else {
-        return rate == DEFAULT_SAMPLE_RATE;
-    }
-}
-
-/*
- * Format
- */
-enum pcm_format profile_get_default_format(alsa_device_profile* profile)
-{
-    /*
-     * TODO this won't be right in general. we should store a preferred format as we are scanning.
-     */
-    return profile_is_valid(profile) ? profile->formats[0] : DEFAULT_SAMPLE_FORMAT;
-}
-
-bool profile_is_format_valid(alsa_device_profile* profile, enum pcm_format fmt) {
-    if (profile_is_valid(profile)) {
-        size_t index;
-        for (index = 0; profile->formats[index] != PCM_FORMAT_INVALID; index++) {
-            if (profile->formats[index] == fmt) {
-                return true;
-            }
-        }
-
-        return false;
-    } else {
-        return fmt == DEFAULT_SAMPLE_FORMAT;
-    }
-}
-
-/*
- * Channels
- */
-unsigned profile_get_default_channel_count(alsa_device_profile* profile)
-{
-    return profile_is_valid(profile) ? profile->channel_counts[0] : DEFAULT_CHANNEL_COUNT;
-}
-
-bool profile_is_channel_count_valid(alsa_device_profile* profile, unsigned count)
-{
-    if (profile_is_initialized(profile)) {
-        return count >= profile->min_channel_count && count <= profile->max_channel_count;
-    } else {
-        return count == DEFAULT_CHANNEL_COUNT;
-    }
-}
-
-static bool profile_test_sample_rate(alsa_device_profile* profile, unsigned rate)
-{
-    struct pcm_config config = profile->default_config;
-    config.rate = rate;
-
-    bool works = false; /* let's be pessimistic */
-    struct pcm * pcm = pcm_open(profile->card, profile->device,
-                                profile->direction, &config);
-
-    if (pcm != NULL) {
-        works = pcm_is_ready(pcm);
-        pcm_close(pcm);
-    }
-
-    return works;
-}
-
-static unsigned profile_enum_sample_rates(alsa_device_profile* profile, unsigned min, unsigned max)
-{
-    unsigned num_entries = 0;
-    unsigned index;
-
-    for (index = 0; index < ARRAY_SIZE(std_sample_rates) &&
-                    num_entries < ARRAY_SIZE(profile->sample_rates) - 1;
-         index++) {
-        if (std_sample_rates[index] >= min && std_sample_rates[index] <= max
-                && profile_test_sample_rate(profile, std_sample_rates[index])) {
-            profile->sample_rates[num_entries++] = std_sample_rates[index];
-        }
-    }
-
-    return num_entries; /* return # of supported rates */
-}
-
-static unsigned profile_enum_sample_formats(alsa_device_profile* profile, struct pcm_mask * mask)
-{
-    const int num_slots = ARRAY_SIZE(mask->bits);
-    const int bits_per_slot = sizeof(mask->bits[0]) * 8;
-
-    const int table_size = ARRAY_SIZE(pcm_format_value_map);
-
-    int slot_index, bit_index, table_index;
-    table_index = 0;
-    int num_written = 0;
-    for (slot_index = 0; slot_index < num_slots && table_index < table_size;
-            slot_index++) {
-        unsigned bit_mask = 1;
-        for (bit_index = 0;
-                bit_index < bits_per_slot && table_index < table_size;
-                bit_index++) {
-            if ((mask->bits[slot_index] & bit_mask) != 0) {
-                enum pcm_format format = pcm_format_value_map[table_index];
-                /* Never return invalid (unrecognized) or 8-bit */
-                if (format != PCM_FORMAT_INVALID && format != PCM_FORMAT_S8) {
-                    profile->formats[num_written++] = format;
-                    if (num_written == ARRAY_SIZE(profile->formats) - 1) {
-                        /* leave at least one PCM_FORMAT_INVALID at the end */
-                        return num_written;
-                    }
-                }
-            }
-            bit_mask <<= 1;
-            table_index++;
-        }
-    }
-
-    return num_written;
-}
-
-static unsigned profile_enum_channel_counts(alsa_device_profile* profile, unsigned min,
-        unsigned max)
-{
-    static const unsigned std_channel_counts[] = {8, 4, 2, 1};
-
-    unsigned num_counts = 0;
-    unsigned index;
-    /* TODO write a profile_test_channel_count() */
-    /* Ensure there is at least one invalid channel count to terminate the channel counts array */
-    for (index = 0; index < ARRAY_SIZE(std_channel_counts) &&
-                    num_counts < ARRAY_SIZE(profile->channel_counts) - 1;
-         index++) {
-        /* TODO Do we want a channel counts test? */
-        if (std_channel_counts[index] >= min && std_channel_counts[index] <= max /* &&
-            profile_test_channel_count(profile, channel_counts[index])*/) {
-            profile->channel_counts[num_counts++] = std_channel_counts[index];
-        }
-    }
-
-    return num_counts; /* return # of supported counts */
-}
-
-/*
- * Reads and decodes configuration info from the specified ALSA card/device.
- */
-static int read_alsa_device_config(alsa_device_profile * profile, struct pcm_config * config)
-{
-    ALOGV("usb:audio_hw - read_alsa_device_config(c:%d d:%d t:0x%X)",
-          profile->card, profile->device, profile->direction);
-
-    if (profile->card < 0 || profile->device < 0) {
-        return -EINVAL;
-    }
-
-    struct pcm_params * alsa_hw_params =
-        pcm_params_get(profile->card, profile->device, profile->direction);
-    if (alsa_hw_params == NULL) {
-        return -EINVAL;
-    }
-
-    profile->min_period_size = pcm_params_get_min(alsa_hw_params, PCM_PARAM_PERIOD_SIZE);
-    profile->max_period_size = pcm_params_get_max(alsa_hw_params, PCM_PARAM_PERIOD_SIZE);
-
-    profile->min_channel_count = pcm_params_get_min(alsa_hw_params, PCM_PARAM_CHANNELS);
-    profile->max_channel_count = pcm_params_get_max(alsa_hw_params, PCM_PARAM_CHANNELS);
-
-    int ret = 0;
-
-    /*
-     * This Logging will be useful when testing new USB devices.
-     */
-#ifdef LOG_PCM_PARAMS
-    log_pcm_params(alsa_hw_params);
-#endif
-
-    config->channels = pcm_params_get_min(alsa_hw_params, PCM_PARAM_CHANNELS);
-    config->rate = pcm_params_get_min(alsa_hw_params, PCM_PARAM_RATE);
-    config->period_size = profile_calc_min_period_size(profile, config->rate);
-    config->period_count = pcm_params_get_min(alsa_hw_params, PCM_PARAM_PERIODS);
-    config->format = get_pcm_format_for_mask(pcm_params_get_mask(alsa_hw_params, PCM_PARAM_FORMAT));
-#ifdef LOG_PCM_PARAMS
-    log_pcm_config(config, "read_alsa_device_config");
-#endif
-    if (config->format == PCM_FORMAT_INVALID) {
-        ret = -EINVAL;
-    }
-
-    pcm_params_free(alsa_hw_params);
-
-    return ret;
-}
-
-bool profile_read_device_info(alsa_device_profile* profile)
-{
-    if (!profile_is_initialized(profile)) {
-        return false;
-    }
-
-    /* let's get some defaults */
-    read_alsa_device_config(profile, &profile->default_config);
-    ALOGV("default_config chans:%d rate:%d format:%d count:%d size:%d",
-          profile->default_config.channels, profile->default_config.rate,
-          profile->default_config.format, profile->default_config.period_count,
-          profile->default_config.period_size);
-
-    struct pcm_params * alsa_hw_params = pcm_params_get(profile->card,
-                                                        profile->device,
-                                                        profile->direction);
-    if (alsa_hw_params == NULL) {
-        return false;
-    }
-
-    /* Formats */
-    struct pcm_mask * format_mask = pcm_params_get_mask(alsa_hw_params, PCM_PARAM_FORMAT);
-    profile_enum_sample_formats(profile, format_mask);
-
-    /* Channels */
-    profile_enum_channel_counts(
-            profile, pcm_params_get_min(alsa_hw_params, PCM_PARAM_CHANNELS),
-            pcm_params_get_max(alsa_hw_params, PCM_PARAM_CHANNELS));
-
-    /* Sample Rates */
-    profile_enum_sample_rates(
-            profile, pcm_params_get_min(alsa_hw_params, PCM_PARAM_RATE),
-            pcm_params_get_max(alsa_hw_params, PCM_PARAM_RATE));
-
-    profile->is_valid = true;
-
-    return true;
-}
-
-char * profile_get_sample_rate_strs(alsa_device_profile* profile)
-{
-    char buffer[128];
-    buffer[0] = '\0';
-    int buffSize = ARRAY_SIZE(buffer);
-
-    char numBuffer[32];
-
-    int numEntries = 0;
-    unsigned index;
-    for (index = 0; profile->sample_rates[index] != 0; index++) {
-        if (numEntries++ != 0) {
-            strncat(buffer, "|", buffSize);
-        }
-        snprintf(numBuffer, sizeof(numBuffer), "%u", profile->sample_rates[index]);
-        strncat(buffer, numBuffer, buffSize);
-    }
-
-    return strdup(buffer);
-}
-
-char * profile_get_format_strs(alsa_device_profile* profile)
-{
-    /* TODO remove this hack when we have support for input in non PCM16 formats */
-    if (profile->direction == PCM_IN) {
-        return strdup("AUDIO_FORMAT_PCM_16_BIT");
-    }
-
-    char buffer[128];
-    buffer[0] = '\0';
-    int buffSize = ARRAY_SIZE(buffer);
-
-    int numEntries = 0;
-    unsigned index = 0;
-    for (index = 0; profile->formats[index] != PCM_FORMAT_INVALID; index++) {
-        if (numEntries++ != 0) {
-            strncat(buffer, "|", buffSize);
-        }
-        strncat(buffer, format_string_map[profile->formats[index]], buffSize);
-    }
-
-    return strdup(buffer);
-}
-
-char * profile_get_channel_count_strs(alsa_device_profile* profile)
-{
-    static const char * const out_chans_strs[] = {
-        /* 0 */"AUDIO_CHANNEL_NONE", /* will never be taken as this is a terminator */
-        /* 1 */"AUDIO_CHANNEL_OUT_MONO",
-        /* 2 */"AUDIO_CHANNEL_OUT_STEREO",
-        /* 3 */ /* "AUDIO_CHANNEL_OUT_STEREO|AUDIO_CHANNEL_OUT_FRONT_CENTER" */ NULL,
-        /* 4 */"AUDIO_CHANNEL_OUT_QUAD",
-        /* 5 */ /* "AUDIO_CHANNEL_OUT_QUAD|AUDIO_CHANNEL_OUT_FRONT_CENTER" */ NULL,
-        /* 6 */"AUDIO_CHANNEL_OUT_5POINT1",
-        /* 7 */ /* "AUDIO_CHANNEL_OUT_5POINT1|AUDIO_CHANNEL_OUT_BACK_CENTER" */ NULL,
-        /* 8 */"AUDIO_CHANNEL_OUT_7POINT1",
-        /* channel counts greater than this not considered */
-    };
-
-    static const char * const in_chans_strs[] = {
-        /* 0 */"AUDIO_CHANNEL_NONE", /* will never be taken as this is a terminator */
-        /* 1 */"AUDIO_CHANNEL_IN_MONO",
-        /* 2 */"AUDIO_CHANNEL_IN_STEREO",
-        /* channel counts greater than this not considered */
-    };
-
-    const bool isOutProfile = profile->direction == PCM_OUT;
-
-    const char * const * const names_array = isOutProfile ? out_chans_strs : in_chans_strs;
-    const size_t names_size = isOutProfile ? ARRAY_SIZE(out_chans_strs)
-            : ARRAY_SIZE(in_chans_strs);
-
-    char buffer[256]; /* caution, may need to be expanded */
-    buffer[0] = '\0';
-    const int buffer_size = ARRAY_SIZE(buffer);
-    int num_entries = 0;
-    /* We currently support MONO and STEREO, and always report STEREO but some (many)
-     * USB Audio Devices may only announce support for MONO (a headset mic for example), or
-     * The total number of output channels. SO, if the device itself doesn't explicitly
-     * support STEREO, append to the channel config strings we are generating.
-     */
-    bool stereo_present = false;
-    unsigned index;
-    unsigned channel_count;
-
-    for (index = 0; (channel_count = profile->channel_counts[index]) != 0; index++) {
-        stereo_present = stereo_present || channel_count == 2;
-        if (channel_count < names_size && names_array[channel_count] != NULL) {
-            if (num_entries++ != 0) {
-                strncat(buffer, "|", buffer_size);
-            }
-            strncat(buffer, names_array[channel_count], buffer_size);
-        }
-    }
-
-    /* emulated modes:
-     * always expose stereo as we can emulate it for PCM_OUT
-     */
-    if (!stereo_present) {
-        if (num_entries++ != 0) {
-            strncat(buffer, "|", buffer_size);
-        }
-        strncat(buffer, names_array[2], buffer_size); /* stereo */
-    }
-
-    return strdup(buffer);
-}
diff --git a/modules/usbaudio/alsa_device_profile.h b/modules/usbaudio/alsa_device_profile.h
deleted file mode 100644
index 2c0da39..0000000
--- a/modules/usbaudio/alsa_device_profile.h
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ANDROID_HARDWARE_LIBHARDWARE_MODULES_USBAUDIO_ALSA_DEVICE_PROFILE_H
-#define ANDROID_HARDWARE_LIBHARDWARE_MODULES_USBAUDIO_ALSA_DEVICE_PROFILE_H
-
-#include <stdbool.h>
-
-#include <tinyalsa/asoundlib.h>
-
-#define MAX_PROFILE_FORMATS         6  /* We long support the 5 standard formats defined
-                                        * in asound.h, so we just need this to be 1 more
-                                        * than that */
-#define MAX_PROFILE_SAMPLE_RATES    10 /* this number needs to be 1 more than the number of
-                                        * standard formats in std_sample_rates[]
-                                        * (in alsa_device_profile.c) */
-#define MAX_PROFILE_CHANNEL_COUNTS  5  /* this number need to be 1 more than the number of
-                                        * standard channel formats in std_channel_counts[]
-                                        * (in alsa_device_profile.c) */
-
-#define DEFAULT_SAMPLE_RATE         44100
-#define DEFAULT_SAMPLE_FORMAT       PCM_FORMAT_S16_LE
-#define DEFAULT_CHANNEL_COUNT       2
-
-typedef struct  {
-    int card;
-    int device;
-    int direction; /* PCM_OUT or PCM_IN */
-
-    enum pcm_format formats[MAX_PROFILE_FORMATS];
-
-    unsigned sample_rates[MAX_PROFILE_SAMPLE_RATES];
-
-    unsigned channel_counts[MAX_PROFILE_CHANNEL_COUNTS];
-
-    bool is_valid;
-
-    /* read from the hardware device */
-    struct pcm_config default_config;
-
-    unsigned min_period_size;
-    unsigned max_period_size;
-
-    unsigned min_channel_count;
-    unsigned max_channel_count;
-} alsa_device_profile;
-
-void profile_init(alsa_device_profile* profile, int direction);
-bool profile_is_initialized(alsa_device_profile* profile);
-bool profile_is_valid(alsa_device_profile* profile);
-bool profile_is_cached_for(alsa_device_profile* profile, int card, int device);
-void profile_decache(alsa_device_profile* profile);
-
-bool profile_read_device_info(alsa_device_profile* profile);
-
-/* Audio Config Strings Methods */
-char * profile_get_sample_rate_strs(alsa_device_profile* profile);
-char * profile_get_format_strs(alsa_device_profile* profile);
-char * profile_get_channel_count_strs(alsa_device_profile* profile);
-
-/* Sample Rate Methods */
-unsigned profile_get_default_sample_rate(alsa_device_profile* profile);
-bool profile_is_sample_rate_valid(alsa_device_profile* profile, unsigned rate);
-
-/* Format Methods */
-enum pcm_format profile_get_default_format(alsa_device_profile* profile);
-bool profile_is_format_valid(alsa_device_profile* profile, enum pcm_format fmt);
-
-/* Channel Methods */
-unsigned profile_get_default_channel_count(alsa_device_profile* profile);
-bool profile_is_channel_count_valid(alsa_device_profile* profile, unsigned count);
-
-/* Utility */
-unsigned profile_calc_min_period_size(alsa_device_profile* profile, unsigned sample_rate);
-unsigned int profile_get_period_size(alsa_device_profile* profile, unsigned sample_rate);
-
-#endif /* ANDROID_HARDWARE_LIBHARDWARE_MODULES_USBAUDIO_ALSA_DEVICE_PROFILE_H */
diff --git a/modules/usbaudio/alsa_device_proxy.c b/modules/usbaudio/alsa_device_proxy.c
deleted file mode 100644
index 3d13acd..0000000
--- a/modules/usbaudio/alsa_device_proxy.c
+++ /dev/null
@@ -1,159 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "alsa_device_proxy"
-/*#define LOG_NDEBUG 0*/
-/*#define LOG_PCM_PARAMS 0*/
-
-#include <log/log.h>
-
-#include <errno.h>
-
-#include "alsa_device_proxy.h"
-
-#include "audio_logging.h"
-
-#define DEFAULT_PERIOD_SIZE     1024
-#define DEFAULT_PERIOD_COUNT    2
-
-void proxy_prepare(alsa_device_proxy * proxy, alsa_device_profile* profile,
-                   struct pcm_config * config)
-{
-    ALOGV("proxy_prepare(c:%d, d:%d)", profile->card, profile->device);
-
-    proxy->profile = profile;
-
-#ifdef LOG_PCM_PARAMS
-    log_pcm_config(config, "proxy_setup()");
-#endif
-
-    proxy->alsa_config.format =
-        config->format != PCM_FORMAT_INVALID && profile_is_format_valid(profile, config->format)
-            ? config->format : profile->default_config.format;
-    proxy->alsa_config.rate =
-        config->rate != 0 && profile_is_sample_rate_valid(profile, config->rate)
-            ? config->rate : profile->default_config.rate;
-    proxy->alsa_config.channels =
-        config->channels != 0 && profile_is_channel_count_valid(profile, config->channels)
-            ? config->channels : profile->default_config.channels;
-
-    proxy->alsa_config.period_count = profile->default_config.period_count;
-    proxy->alsa_config.period_size =
-            profile_get_period_size(proxy->profile, proxy->alsa_config.rate);
-
-    // Hack for USB accessory audio.
-    // Here we set the correct value for period_count if tinyalsa fails to get it from the
-    // f_audio_source driver.
-    if (proxy->alsa_config.period_count == 0) {
-        proxy->alsa_config.period_count = 4;
-    }
-
-    proxy->pcm = NULL;
-}
-
-int proxy_open(alsa_device_proxy * proxy)
-{
-    alsa_device_profile* profile = proxy->profile;
-    ALOGV("proxy_open(card:%d device:%d %s)", profile->card, profile->device,
-          profile->direction == PCM_OUT ? "PCM_OUT" : "PCM_IN");
-
-    if (profile->card < 0 || profile->device < 0) {
-        return -EINVAL;
-    }
-
-    proxy->pcm = pcm_open(profile->card, profile->device, profile->direction, &proxy->alsa_config);
-    if (proxy->pcm == NULL) {
-        return -ENOMEM;
-    }
-
-    if (!pcm_is_ready(proxy->pcm)) {
-        ALOGE("  proxy_open() pcm_open() failed: %s", pcm_get_error(proxy->pcm));
-#if defined(LOG_PCM_PARAMS)
-        log_pcm_config(&proxy->alsa_config, "config");
-#endif
-        pcm_close(proxy->pcm);
-        proxy->pcm = NULL;
-        return -ENOMEM;
-    }
-
-    return 0;
-}
-
-void proxy_close(alsa_device_proxy * proxy)
-{
-    ALOGV("proxy_close() [pcm:%p]", proxy->pcm);
-
-    if (proxy->pcm != NULL) {
-        pcm_close(proxy->pcm);
-        proxy->pcm = NULL;
-    }
-}
-
-/*
- * Sample Rate
- */
-unsigned proxy_get_sample_rate(const alsa_device_proxy * proxy)
-{
-    return proxy->alsa_config.rate;
-}
-
-/*
- * Format
- */
-enum pcm_format proxy_get_format(const alsa_device_proxy * proxy)
-{
-    return proxy->alsa_config.format;
-}
-
-/*
- * Channel Count
- */
-unsigned proxy_get_channel_count(const alsa_device_proxy * proxy)
-{
-    return proxy->alsa_config.channels;
-}
-
-/*
- * Other
- */
-unsigned int proxy_get_period_size(const alsa_device_proxy * proxy)
-{
-    return proxy->alsa_config.period_size;
-}
-
-unsigned int proxy_get_period_count(const alsa_device_proxy * proxy)
-{
-    return proxy->alsa_config.period_count;
-}
-
-unsigned proxy_get_latency(const alsa_device_proxy * proxy)
-{
-    return (proxy_get_period_size(proxy) * proxy_get_period_count(proxy) * 1000)
-               / proxy_get_sample_rate(proxy);
-}
-
-/*
- * I/O
- */
-int proxy_write(const alsa_device_proxy * proxy, const void *data, unsigned int count)
-{
-    return pcm_write(proxy->pcm, data, count);
-}
-
-int proxy_read(const alsa_device_proxy * proxy, void *data, unsigned int count)
-{
-    return pcm_read(proxy->pcm, data, count);
-}
diff --git a/modules/usbaudio/alsa_device_proxy.h b/modules/usbaudio/alsa_device_proxy.h
deleted file mode 100644
index f090c56..0000000
--- a/modules/usbaudio/alsa_device_proxy.h
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ANDROID_HARDWARE_LIBHARDWARE_MODULES_USBAUDIO_ALSA_DEVICE_PROXY_H
-#define ANDROID_HARDWARE_LIBHARDWARE_MODULES_USBAUDIO_ALSA_DEVICE_PROXY_H
-
-#include <tinyalsa/asoundlib.h>
-
-#include "alsa_device_profile.h"
-
-typedef struct {
-    alsa_device_profile* profile;
-
-    struct pcm_config alsa_config;
-
-    struct pcm * pcm;
-} alsa_device_proxy;
-
-void proxy_prepare(alsa_device_proxy * proxy, alsa_device_profile * profile,
-                   struct pcm_config * config);
-
-unsigned proxy_get_sample_rate(const alsa_device_proxy * proxy);
-enum pcm_format proxy_get_format(const alsa_device_proxy * proxy);
-unsigned proxy_get_channel_count(const alsa_device_proxy * proxy);
-
-unsigned int proxy_get_period_size(const alsa_device_proxy * proxy);
-
-unsigned proxy_get_latency(const alsa_device_proxy * proxy);
-
-int proxy_open(alsa_device_proxy * proxy);
-void proxy_close(alsa_device_proxy * proxy);
-
-int proxy_write(const alsa_device_proxy * proxy, const void *data, unsigned int count);
-int proxy_read(const alsa_device_proxy * proxy, void *data, unsigned int count);
-
-#endif /* ANDROID_HARDWARE_LIBHARDWARE_MODULES_USBAUDIO_ALSA_DEVICE_PROXY_H */
diff --git a/modules/usbaudio/audio_format.c b/modules/usbaudio/audio_format.c
deleted file mode 100644
index 63b1ba8..0000000
--- a/modules/usbaudio/audio_format.c
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "audio_format"
-/*#define LOG_NDEBUG 0*/
-
-#include "audio_format.h"
-
-#include <tinyalsa/asoundlib.h>
-
-#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
-
-/*
- * Maps from bit position in pcm_mask to PCM_ format constants.
- */
-int8_t const pcm_format_value_map[50] = {
-    PCM_FORMAT_S8,          /* 00 - SNDRV_PCM_FORMAT_S8 */
-    PCM_FORMAT_INVALID,     /* 01 - SNDRV_PCM_FORMAT_U8 */
-    PCM_FORMAT_S16_LE,      /* 02 - SNDRV_PCM_FORMAT_S16_LE */
-    PCM_FORMAT_INVALID,     /* 03 - SNDRV_PCM_FORMAT_S16_BE */
-    PCM_FORMAT_INVALID,     /* 04 - SNDRV_PCM_FORMAT_U16_LE */
-    PCM_FORMAT_INVALID,     /* 05 - SNDRV_PCM_FORMAT_U16_BE */
-    PCM_FORMAT_S24_3LE,     /* 06 - SNDRV_PCM_FORMAT_S24_LE */
-    PCM_FORMAT_INVALID,     /* 07 - SNDRV_PCM_FORMAT_S24_BE */
-    PCM_FORMAT_INVALID,     /* 08 - SNDRV_PCM_FORMAT_U24_LE */
-    PCM_FORMAT_INVALID,     /* 09 - SNDRV_PCM_FORMAT_U24_BE */
-    PCM_FORMAT_S32_LE,      /* 10 - SNDRV_PCM_FORMAT_S32_LE */
-    PCM_FORMAT_INVALID,     /* 11 - SNDRV_PCM_FORMAT_S32_BE */
-    PCM_FORMAT_INVALID,     /* 12 - SNDRV_PCM_FORMAT_U32_LE */
-    PCM_FORMAT_INVALID,     /* 13 - SNDRV_PCM_FORMAT_U32_BE */
-    PCM_FORMAT_INVALID,     /* 14 - SNDRV_PCM_FORMAT_FLOAT_LE */
-    PCM_FORMAT_INVALID,     /* 15 - SNDRV_PCM_FORMAT_FLOAT_BE */
-    PCM_FORMAT_INVALID,     /* 16 - SNDRV_PCM_FORMAT_FLOAT64_LE */
-    PCM_FORMAT_INVALID,     /* 17 - SNDRV_PCM_FORMAT_FLOAT64_BE */
-    PCM_FORMAT_INVALID,     /* 18 - SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE */
-    PCM_FORMAT_INVALID,     /* 19 - SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE */
-    PCM_FORMAT_INVALID,     /* 20 - SNDRV_PCM_FORMAT_MU_LAW */
-    PCM_FORMAT_INVALID,     /* 21 - SNDRV_PCM_FORMAT_A_LAW */
-    PCM_FORMAT_INVALID,     /* 22 - SNDRV_PCM_FORMAT_IMA_ADPCM */
-    PCM_FORMAT_INVALID,     /* 23 - SNDRV_PCM_FORMAT_MPEG */
-    PCM_FORMAT_INVALID,     /* 24 - SNDRV_PCM_FORMAT_GSM */
-    PCM_FORMAT_INVALID,     /* 25 -> 30 (not assigned) */
-    PCM_FORMAT_INVALID,
-    PCM_FORMAT_INVALID,
-    PCM_FORMAT_INVALID,
-    PCM_FORMAT_INVALID,
-    PCM_FORMAT_INVALID,
-    PCM_FORMAT_INVALID,     /* 31 - SNDRV_PCM_FORMAT_SPECIAL */
-    PCM_FORMAT_S24_3LE,     /* 32 - SNDRV_PCM_FORMAT_S24_3LE */ /* ??? */
-    PCM_FORMAT_INVALID,     /* 33 - SNDRV_PCM_FORMAT_S24_3BE */
-    PCM_FORMAT_INVALID,     /* 34 - SNDRV_PCM_FORMAT_U24_3LE */
-    PCM_FORMAT_INVALID,     /* 35 - SNDRV_PCM_FORMAT_U24_3BE */
-    PCM_FORMAT_INVALID,     /* 36 - SNDRV_PCM_FORMAT_S20_3LE */
-    PCM_FORMAT_INVALID,     /* 37 - SNDRV_PCM_FORMAT_S20_3BE */
-    PCM_FORMAT_INVALID,     /* 38 - SNDRV_PCM_FORMAT_U20_3LE */
-    PCM_FORMAT_INVALID,     /* 39 - SNDRV_PCM_FORMAT_U20_3BE */
-    PCM_FORMAT_INVALID,     /* 40 - SNDRV_PCM_FORMAT_S18_3LE */
-    PCM_FORMAT_INVALID,     /* 41 - SNDRV_PCM_FORMAT_S18_3BE */
-    PCM_FORMAT_INVALID,     /* 42 - SNDRV_PCM_FORMAT_U18_3LE */
-    PCM_FORMAT_INVALID,     /* 43 - SNDRV_PCM_FORMAT_U18_3BE */
-    PCM_FORMAT_INVALID,     /* 44 - SNDRV_PCM_FORMAT_G723_24 */
-    PCM_FORMAT_INVALID,     /* 45 - SNDRV_PCM_FORMAT_G723_24_1B */
-    PCM_FORMAT_INVALID,     /* 46 - SNDRV_PCM_FORMAT_G723_40 */
-    PCM_FORMAT_INVALID,     /* 47 - SNDRV_PCM_FORMAT_G723_40_1B */
-    PCM_FORMAT_INVALID,     /* 48 - SNDRV_PCM_FORMAT_DSD_U8 */
-    PCM_FORMAT_INVALID      /* 49 - SNDRV_PCM_FORMAT_DSD_U16_LE */
-};
-
-/*
- * Scans the provided format mask and returns the first non-8 bit sample
- * format supported by the devices.
- */
-enum pcm_format get_pcm_format_for_mask(struct pcm_mask* mask)
-{
-    int num_slots = ARRAY_SIZE(mask->bits);
-    int bits_per_slot = sizeof(mask->bits[0]) * 8;
-
-    int table_size = ARRAY_SIZE(pcm_format_value_map);
-
-    int slot_index, bit_index, table_index;
-    table_index = 0;
-    int num_written = 0;
-    for (slot_index = 0; slot_index < num_slots && table_index < table_size; slot_index++) {
-        unsigned bit_mask = 1;
-        for (bit_index = 0; bit_index < bits_per_slot && table_index < table_size; bit_index++) {
-            /* skip any 8-bit formats */
-            if (table_index >= 2 && (mask->bits[slot_index] & bit_mask) != 0) {
-                /* just return the first one which will be at least 16-bit */
-                return (int)pcm_format_value_map[table_index];
-            }
-            bit_mask <<= 1;
-            table_index++;
-        }
-    }
-
-    return PCM_FORMAT_INVALID;
-}
diff --git a/modules/usbaudio/audio_format.h b/modules/usbaudio/audio_format.h
deleted file mode 100644
index 712ef67..0000000
--- a/modules/usbaudio/audio_format.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ANDROID_HARDWARE_LIBHARDWARE_MODULES_USBAUDIO_AUDIO_FORMAT_H
-#define ANDROID_HARDWARE_LIBHARDWARE_MODULES_USBAUDIO_AUDIO_FORMAT_H
-
-#include <system/audio.h>
-
-#include <tinyalsa/asoundlib.h>
-
-enum pcm_format get_pcm_format_for_mask(struct pcm_mask* mask);
-
-#endif /* ANDROID_HARDWARE_LIBHARDWARE_MODULES_USBAUDIO_AUDIO_FORMAT_H */
diff --git a/modules/usbaudio/audio_hw.c b/modules/usbaudio/audio_hal.c
similarity index 99%
rename from modules/usbaudio/audio_hw.c
rename to modules/usbaudio/audio_hal.c
index f391b10..2814e37 100644
--- a/modules/usbaudio/audio_hw.c
+++ b/modules/usbaudio/audio_hal.c
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#define LOG_TAG "usb_audio_hw"
+#define LOG_TAG "modules.usbaudio.audio_hal"
 /*#define LOG_NDEBUG 0*/
 
 #include <errno.h>
@@ -51,7 +51,7 @@
 
 #include "alsa_device_profile.h"
 #include "alsa_device_proxy.h"
-#include "audio_logging.h"
+#include "alsa_logging.h"
 
 #define DEFAULT_INPUT_BUFFER_SIZE_MS 20
 
diff --git a/modules/usbaudio/audio_logging.c b/modules/usbaudio/audio_logging.c
deleted file mode 100644
index 77fbd51..0000000
--- a/modules/usbaudio/audio_logging.c
+++ /dev/null
@@ -1,129 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "audio_logging"
-/*#define LOG_NDEBUG 0*/
-
-#include <string.h>
-
-#include <log/log.h>
-
-#include "audio_logging.h"
-
-#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
-
-/*
- * Logging
- */
-void log_pcm_mask(const char* mask_name, struct pcm_mask* mask)
-{
-    const size_t num_slots = ARRAY_SIZE(mask->bits);
-    const size_t bits_per_slot = (sizeof(mask->bits[0]) * 8);
-    const size_t chars_per_slot = (bits_per_slot + 1); /* comma */
-
-    const size_t BUFF_SIZE =
-            (num_slots * chars_per_slot + 2 + 1);  /* brackets and null-terminator */
-    char buff[BUFF_SIZE];
-    buff[0] = '\0';
-
-    size_t slot_index, bit_index;
-    strcat(buff, "[");
-    for (slot_index = 0; slot_index < num_slots; slot_index++) {
-        unsigned bit_mask = 1;
-        for (bit_index = 0; bit_index < bits_per_slot; bit_index++) {
-            strcat(buff, (mask->bits[slot_index] & bit_mask) != 0 ? "1" : "0");
-            bit_mask <<= 1;
-        }
-        if (slot_index < num_slots - 1) {
-            strcat(buff, ",");
-        }
-    }
-    strcat(buff, "]");
-
-    ALOGV("%s: mask:%s", mask_name, buff);
-}
-
-void log_pcm_params(struct pcm_params * alsa_hw_params)
-{
-    ALOGV("usb:audio_hw - PCM_PARAM_SAMPLE_BITS min:%u, max:%u",
-          pcm_params_get_min(alsa_hw_params, PCM_PARAM_SAMPLE_BITS),
-          pcm_params_get_max(alsa_hw_params, PCM_PARAM_SAMPLE_BITS));
-    ALOGV("usb:audio_hw - PCM_PARAM_FRAME_BITS min:%u, max:%u",
-          pcm_params_get_min(alsa_hw_params, PCM_PARAM_FRAME_BITS),
-          pcm_params_get_max(alsa_hw_params, PCM_PARAM_FRAME_BITS));
-    log_pcm_mask("PCM_PARAM_FORMAT",
-                 pcm_params_get_mask(alsa_hw_params, PCM_PARAM_FORMAT));
-    log_pcm_mask("PCM_PARAM_SUBFORMAT",
-                 pcm_params_get_mask(alsa_hw_params, PCM_PARAM_SUBFORMAT));
-    ALOGV("usb:audio_hw - PCM_PARAM_CHANNELS min:%u, max:%u",
-          pcm_params_get_min(alsa_hw_params, PCM_PARAM_CHANNELS),
-          pcm_params_get_max(alsa_hw_params, PCM_PARAM_CHANNELS));
-    ALOGV("usb:audio_hw - PCM_PARAM_RATE min:%u, max:%u",
-          pcm_params_get_min(alsa_hw_params, PCM_PARAM_RATE),
-          pcm_params_get_max(alsa_hw_params, PCM_PARAM_RATE));
-    ALOGV("usb:audio_hw - PCM_PARAM_PERIOD_TIME min:%u, max:%u",
-          pcm_params_get_min(alsa_hw_params, PCM_PARAM_PERIOD_TIME),
-          pcm_params_get_max(alsa_hw_params, PCM_PARAM_PERIOD_TIME));
-    ALOGV("usb:audio_hw - PCM_PARAM_PERIOD_SIZE min:%u, max:%u",
-          pcm_params_get_min(alsa_hw_params, PCM_PARAM_PERIOD_SIZE),
-          pcm_params_get_max(alsa_hw_params, PCM_PARAM_PERIOD_SIZE));
-    ALOGV("usb:audio_hw - PCM_PARAM_PERIOD_BYTES min:%u, max:%u",
-          pcm_params_get_min(alsa_hw_params, PCM_PARAM_PERIOD_BYTES),
-          pcm_params_get_max(alsa_hw_params, PCM_PARAM_PERIOD_BYTES));
-    ALOGV("usb:audio_hw - PCM_PARAM_PERIODS min:%u, max:%u",
-          pcm_params_get_min(alsa_hw_params, PCM_PARAM_PERIODS),
-          pcm_params_get_max(alsa_hw_params, PCM_PARAM_PERIODS));
-    ALOGV("usb:audio_hw - PCM_PARAM_BUFFER_TIME min:%u, max:%u",
-          pcm_params_get_min(alsa_hw_params, PCM_PARAM_BUFFER_TIME),
-          pcm_params_get_max(alsa_hw_params, PCM_PARAM_BUFFER_TIME));
-    ALOGV("usb:audio_hw - PCM_PARAM_BUFFER_SIZE min:%u, max:%u",
-          pcm_params_get_min(alsa_hw_params, PCM_PARAM_BUFFER_SIZE),
-          pcm_params_get_max(alsa_hw_params, PCM_PARAM_BUFFER_SIZE));
-    ALOGV("usb:audio_hw - PCM_PARAM_BUFFER_BYTES min:%u, max:%u",
-          pcm_params_get_min(alsa_hw_params, PCM_PARAM_BUFFER_BYTES),
-          pcm_params_get_max(alsa_hw_params, PCM_PARAM_BUFFER_BYTES));
-    ALOGV("usb:audio_hw - PCM_PARAM_TICK_TIME min:%u, max:%u",
-          pcm_params_get_min(alsa_hw_params, PCM_PARAM_TICK_TIME),
-          pcm_params_get_max(alsa_hw_params, PCM_PARAM_TICK_TIME));
-}
-
-void log_pcm_config(struct pcm_config * config, const char* label) {
-    ALOGV("log_pcm_config() - %s", label);
-    ALOGV("  channels:%d", config->channels);
-    ALOGV("  rate:%d", config->rate);
-    ALOGV("  period_size:%d", config->period_size);
-    ALOGV("  period_count:%d", config->period_count);
-    ALOGV("  format:%d", config->format);
-#if 0
-    /* Values to use for the ALSA start, stop and silence thresholds.  Setting
-     * any one of these values to 0 will cause the default tinyalsa values to be
-     * used instead.  Tinyalsa defaults are as follows.
-     *
-     * start_threshold   : period_count * period_size
-     * stop_threshold    : period_count * period_size
-     * silence_threshold : 0
-     */
-    unsigned int start_threshold;
-    unsigned int stop_threshold;
-    unsigned int silence_threshold;
-
-    /* Minimum number of frames available before pcm_mmap_write() will actually
-     * write into the kernel buffer. Only used if the stream is opened in mmap mode
-     * (pcm_open() called with PCM_MMAP flag set).   Use 0 for default.
-     */
-    int avail_min;
-#endif
-}
diff --git a/modules/usbaudio/audio_logging.h b/modules/usbaudio/audio_logging.h
deleted file mode 100644
index 082e8b2..0000000
--- a/modules/usbaudio/audio_logging.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ANDROID_HARDWARE_LIBHARDWARE_MODULES_USBAUDIO_AUDIO_LOGGING_H
-#define ANDROID_HARDWARE_LIBHARDWARE_MODULES_USBAUDIO_AUDIO_LOGGING_H
-
-#include <tinyalsa/asoundlib.h>
-
-void log_pcm_mask(const char* mask_name, struct pcm_mask* mask);
-void log_pcm_params(struct pcm_params * alsa_hw_params);
-void log_pcm_config(struct pcm_config * config, const char* label);
-
-#endif /* ANDROID_HARDWARE_LIBHARDWARE_MODULES_USBAUDIO_AUDIO_LOGGING_H */