am a9b677fc: Merge "improve h/w composer documentation" into ics-mr1
* commit 'a9b677fce432b29ab8f61e13796f34880dc0fe0f':
improve h/w composer documentation
diff --git a/include/hardware/audio.h b/include/hardware/audio.h
index 2d7f39d..ac014a1 100644
--- a/include/hardware/audio.h
+++ b/include/hardware/audio.h
@@ -184,6 +184,14 @@
*/
int (*get_render_position)(const struct audio_stream_out *stream,
uint32_t *dsp_frames);
+
+ /**
+ * get the local time at which the next write to the audio driver will be
+ * presented
+ */
+ int (*get_next_write_timestamp)(const struct audio_stream_out *stream,
+ int64_t *timestamp);
+
};
typedef struct audio_stream_out audio_stream_out_t;
@@ -272,6 +280,15 @@
int (*set_master_volume)(struct audio_hw_device *dev, float volume);
/**
+ * Get the current master volume value for the HAL, if the HAL supports
+ * master volume control. AudioFlinger will query this value from the
+ * primary audio HAL when the service starts and use the value for setting
+ * the initial master volume across all HALs. HALs which do not support
+ * this method should may leave it set to NULL.
+ */
+ int (*get_master_volume)(struct audio_hw_device *dev, float *volume);
+
+ /**
* setMode is called when the audio mode changes. AUDIO_MODE_NORMAL mode
* is for standard audio playback, AUDIO_MODE_RINGTONE when a ringtone is
* playing, and AUDIO_MODE_IN_CALL when a call is in progress.
diff --git a/include/hardware/local_time_hal.h b/include/hardware/local_time_hal.h
new file mode 100644
index 0000000..6b6a317
--- /dev/null
+++ b/include/hardware/local_time_hal.h
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2011 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_LOCAL_TIME_HAL_INTERFACE_H
+#define ANDROID_LOCAL_TIME_HAL_INTERFACE_H
+
+#include <stdint.h>
+
+#include <hardware/hardware.h>
+
+__BEGIN_DECLS
+
+/**
+ * The id of this module
+ */
+#define LOCAL_TIME_HARDWARE_MODULE_ID "local_time"
+
+/**
+ * Name of the local time devices to open
+ */
+#define LOCAL_TIME_HARDWARE_INTERFACE "local_time_hw_if"
+
+/**********************************************************************/
+
+/**
+ * A structure used to collect low level sync data in a lab environment. Most
+ * HAL implementations will never need this structure.
+ */
+struct local_time_debug_event {
+ int64_t local_timesync_event_id;
+ int64_t local_time;
+};
+
+/**
+ * Every hardware module must have a data structure named HAL_MODULE_INFO_SYM
+ * and the fields of this data structure must begin with hw_module_t
+ * followed by module specific information.
+ */
+struct local_time_module {
+ struct hw_module_t common;
+};
+
+struct local_time_hw_device {
+ struct hw_device_t common;
+
+ /**
+ *
+ * Returns the current value of the system wide local time counter
+ */
+ int64_t (*get_local_time)(struct local_time_hw_device* dev);
+
+ /**
+ *
+ * Returns the nominal frequency (in hertz) of the system wide local time
+ * counter
+ */
+ uint64_t (*get_local_freq)(struct local_time_hw_device* dev);
+
+ /**
+ *
+ * Sets the HW slew rate of oscillator which drives the system wide local
+ * time counter. On success, platforms should return 0. Platforms which
+ * do not support HW slew should leave this method set to NULL.
+ *
+ * Valid values for rate range from MIN_INT16 to MAX_INT16. Platform
+ * implementations should attempt map this range linearly to the min/max
+ * slew rate of their hardware.
+ */
+ int (*set_local_slew)(struct local_time_hw_device* dev, int16_t rate);
+
+ /**
+ *
+ * A method used to collect low level sync data in a lab environments.
+ * Most HAL implementations will simply set this member to NULL, or return
+ * -EINVAL to indicate that this functionality is not supported.
+ * Production HALs should never support this method.
+ */
+ int (*get_debug_log)(struct local_time_hw_device* dev,
+ struct local_time_debug_event* records,
+ int max_records);
+};
+
+typedef struct local_time_hw_device local_time_hw_device_t;
+
+/** convenience API for opening and closing a supported device */
+
+static inline int local_time_hw_device_open(
+ const struct hw_module_t* module,
+ struct local_time_hw_device** device)
+{
+ return module->methods->open(module, LOCAL_TIME_HARDWARE_INTERFACE,
+ (struct hw_device_t**)device);
+}
+
+static inline int local_time_hw_device_close(struct local_time_hw_device* device)
+{
+ return device->common.close(&device->common);
+}
+
+
+__END_DECLS
+
+#endif // ANDROID_LOCAL_TIME_INTERFACE_H
diff --git a/modules/Android.mk b/modules/Android.mk
index 6231e78..cea1bb3 100644
--- a/modules/Android.mk
+++ b/modules/Android.mk
@@ -1,2 +1,2 @@
-hardware_modules := gralloc hwcomposer audio nfc
+hardware_modules := gralloc hwcomposer audio local_time nfc
include $(call all-named-subdir-makefiles,$(hardware_modules))
diff --git a/modules/audio/audio_hw.c b/modules/audio/audio_hw.c
index a482604..f25a053 100644
--- a/modules/audio/audio_hw.c
+++ b/modules/audio/audio_hw.c
@@ -126,6 +126,12 @@
return 0;
}
+static int out_get_next_write_timestamp(const struct audio_stream_out *stream,
+ int64_t *timestamp)
+{
+ return -EINVAL;
+}
+
/** audio_stream_in implementation **/
static uint32_t in_get_sample_rate(const struct audio_stream *stream)
{
@@ -236,6 +242,7 @@
out->stream.set_volume = out_set_volume;
out->stream.write = out_write;
out->stream.get_render_position = out_get_render_position;
+ out->stream.get_next_write_timestamp = out_get_next_write_timestamp;
*stream_out = &out->stream;
return 0;
@@ -278,6 +285,12 @@
return -ENOSYS;
}
+static int adev_get_master_volume(struct audio_hw_device *dev,
+ float *volume)
+{
+ return -ENOSYS;
+}
+
static int adev_set_mode(struct audio_hw_device *dev, int mode)
{
return 0;
@@ -401,6 +414,7 @@
adev->device.init_check = adev_init_check;
adev->device.set_voice_volume = adev_set_voice_volume;
adev->device.set_master_volume = adev_set_master_volume;
+ adev->device.get_master_volume = adev_get_master_volume;
adev->device.set_mode = adev_set_mode;
adev->device.set_mic_mute = adev_set_mic_mute;
adev->device.get_mic_mute = adev_get_mic_mute;
diff --git a/modules/local_time/Android.mk b/modules/local_time/Android.mk
new file mode 100644
index 0000000..f840dc7
--- /dev/null
+++ b/modules/local_time/Android.mk
@@ -0,0 +1,34 @@
+# Copyright (C) 2011 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.
+
+LOCAL_PATH := $(call my-dir)
+
+# The default local time HAL module. The default module simply uses the
+# system's clock_gettime(CLOCK_MONOTONIC) and does not support HW slewing.
+# Devices which use the default implementation should take care to ensure that
+# the oscillator backing the CLOCK_MONOTONIC implementation is phase locked to
+# the audio and video output hardware. This default implementation is loaded
+# if no other device specific modules are present. The exact load order can be
+# seen in libhardware/hardware.c
+#
+# The format of the name is local_time.<hardware>.so
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := local_time.default
+LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
+LOCAL_SRC_FILES := local_time_hw.c
+LOCAL_SHARED_LIBRARIES := liblog libcutils
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_SHARED_LIBRARY)
diff --git a/modules/local_time/local_time_hw.c b/modules/local_time/local_time_hw.c
new file mode 100644
index 0000000..a1f5d43
--- /dev/null
+++ b/modules/local_time/local_time_hw.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2011 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 "local_time_hw_default"
+//#define LOG_NDEBUG 0
+
+#include <errno.h>
+#include <stdint.h>
+#include <sys/time.h>
+#include <linux/time.h>
+
+#include <cutils/log.h>
+
+#include <hardware/hardware.h>
+#include <hardware/local_time_hal.h>
+
+struct stub_local_time_device {
+ struct local_time_hw_device device;
+};
+
+static int64_t ltdev_get_local_time(struct local_time_hw_device* dev)
+{
+ struct timespec ts;
+ uint64_t now;
+ int ret;
+
+ ret = clock_gettime(CLOCK_MONOTONIC, &ts);
+ if (ret < 0) {
+ LOGW("%s failed to fetch CLOCK_MONOTONIC value! (res = %d)",
+ dev->common.module->name, ret);
+ return 0;
+ }
+
+ now = (((uint64_t)ts.tv_sec) * 1000000000ull) +
+ ((uint64_t)ts.tv_nsec);
+
+ return (int64_t)now;
+}
+
+static uint64_t ltdev_get_local_freq(struct local_time_hw_device* dev)
+{
+ // For better or worse, linux clock_gettime routines normalize all clock
+ // frequencies to 1GHz
+ return 1000000000ull;
+}
+
+static int ltdev_close(hw_device_t *device)
+{
+ free(device);
+ return 0;
+}
+
+static int ltdev_open(const hw_module_t* module, const char* name,
+ hw_device_t** device)
+{
+ struct stub_local_time_device *ltdev;
+ struct timespec ts;
+ int ret;
+
+ if (strcmp(name, LOCAL_TIME_HARDWARE_INTERFACE) != 0)
+ return -EINVAL;
+
+ ltdev = calloc(1, sizeof(struct stub_local_time_device));
+ if (!ltdev)
+ return -ENOMEM;
+
+ ltdev->device.common.tag = HARDWARE_DEVICE_TAG;
+ ltdev->device.common.version = 0;
+ ltdev->device.common.module = (struct hw_module_t *) module;
+ ltdev->device.common.close = ltdev_close;
+
+ ltdev->device.get_local_time = ltdev_get_local_time;
+ ltdev->device.get_local_freq = ltdev_get_local_freq;
+ ltdev->device.set_local_slew = NULL;
+ ltdev->device.get_debug_log = NULL;
+
+ *device = <dev->device.common;
+
+ return 0;
+}
+
+static struct hw_module_methods_t hal_module_methods = {
+ .open = ltdev_open,
+};
+
+struct local_time_module HAL_MODULE_INFO_SYM = {
+ .common = {
+ .tag = HARDWARE_MODULE_TAG,
+ .version_major = 1,
+ .version_minor = 0,
+ .id = LOCAL_TIME_HARDWARE_MODULE_ID,
+ .name = "Default local_time HW HAL",
+ .author = "The Android Open Source Project",
+ .methods = &hal_module_methods,
+ },
+};