// --- HwModule class implementation
AudioPolicyManager::HwModule::HwModule(const char *name)
- : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)), mHandle(0)
+ : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
+ mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
{
}
result.append(buffer);
snprintf(buffer, SIZE, " - handle: %d\n", mHandle);
result.append(buffer);
+ snprintf(buffer, SIZE, " - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
+ result.append(buffer);
write(fd, result.string(), result.size());
if (mOutputProfiles.size()) {
write(fd, " - outputs:\n", strlen(" - outputs:\n"));
void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
{
cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
+
if (node == NULL) {
return;
}
} else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
mSpeakerDrcEnabled = stringToBool((char *)node->value);
ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
+ } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
+ uint32_t major, minor;
+ sscanf((char *)node->value, "%u.%u", &major, &minor);
+ module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
+ ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
+ module->mHalVersion, major, minor);
}
node = node->next;
}
--- /dev/null
+#
+# Template audio policy configuration file
+#
+
+# Global configuration section:
+# - before audio HAL version 3.0:
+# lists input and output devices always present on the device
+# as well as the output device selected by default.
+# Devices are designated by a string that corresponds to the enum in audio.h
+#
+# global_configuration {
+# attached_output_devices AUDIO_DEVICE_OUT_SPEAKER
+# default_output_device AUDIO_DEVICE_OUT_SPEAKER
+# attached_input_devices AUDIO_DEVICE_IN_BUILTIN_MIC|AUDIO_DEVICE_IN_REMOTE_SUBMIX
+# }
+#
+# - after and including audio HAL 3.0 the global_configuration section is included in each
+# hardware module section.
+# it also includes the audio HAL version of this hw module:
+# global_configuration {
+# ...
+# audio_hal_version <major.minor> # audio HAL version in e.g. 3.0
+# }
+# other attributes (attached devices, default device) have to be included in the
+# global_configuration section of each hardware module
+
+
+# audio hardware module section: contains descriptors for all audio hw modules present on the
+# device. Each hw module node is named after the corresponding hw module library base name.
+# For instance, "primary" corresponds to audio.primary.<device>.so.
+# The "primary" module is mandatory and must include at least one output with
+# AUDIO_OUTPUT_FLAG_PRIMARY flag.
+# Each module descriptor contains one or more output profile descriptors and zero or more
+# input profile descriptors. Each profile lists all the parameters supported by a given output
+# or input stream category.
+# The "channel_masks", "formats", "devices" and "flags" are specified using strings corresponding
+# to enums in audio.h and audio_policy.h. They are concatenated by use of "|" without space or "\n".
+#
+# For audio HAL version posterior to 3.0 the following sections or sub sections can be present in
+# a hw module section:
+# - A "global_configuration" section: see above
+# - Optionally a "devices" section:
+# This section contains descriptors for audio devices with attributes like an address or a
+# gain controller. The syntax for the devices section and device descriptor is as follows:
+# devices {
+# <device name> { # <device name>: any string without space
+# type <device type> # <device type> e.g. AUDIO_DEVICE_OUT_SPEAKER
+# address <address> # optional: device address, char string less than 64 in length
+# }
+# }
+# - one or more "gains" sections can be present in a device descriptor section.
+# If present, they describe the capabilities of gain controllers attached to this input or
+# output device. e.g. :
+# <device name> { # <device name>: any string without space
+# type <device type> # <device type> e.g. AUDIO_DEVICE_OUT_SPEAKER
+# address <address> # optional: device address, char string less than 64 in length
+# gains {
+# <gain name> {
+# mode <gain modes supported> # e.g. AUDIO_GAIN_MODE_CHANNELS
+# channel_mask <controlled channels> # needed if mode AUDIO_GAIN_MODE_CHANNELS
+# min_value_mB <min value in millibel>
+# max_value_mB <max value in millibel>
+# default_value_mB <default value in millibel>
+# step_value_mB <step value in millibel>
+# min_ramp_ms <min duration in ms> # needed if mode AUDIO_GAIN_MODE_RAMP
+# max_ramp_ms <max duration ms> # needed if mode AUDIO_GAIN_MODE_RAMP
+# }
+# }
+# }
+# - when a device descriptor is present, output and input profiles can refer to this device by
+# its name in their "devices" section instead of specifying a device type. e.g. :
+# outputs {
+# primary {
+# sampling_rates 44100
+# channel_masks AUDIO_CHANNEL_OUT_STEREO
+# formats AUDIO_FORMAT_PCM_16_BIT
+# devices <device name>
+# flags AUDIO_OUTPUT_FLAG_PRIMARY
+# }
+# }
+# sample audio_policy.conf file below
+
+audio_hw_modules {
+ primary {
+ global_configuration {
+ attached_output_devices AUDIO_DEVICE_OUT_SPEAKER
+ default_output_device AUDIO_DEVICE_OUT_SPEAKER
+ attached_input_devices AUDIO_DEVICE_IN_BUILTIN_MIC
+ audio_hal_version 3.0
+ }
+ devices {
+ speaker {
+ type AUDIO_DEVICE_OUT_SPEAKER
+ gains {
+ gain_1 {
+ mode AUDIO_GAIN_MODE_JOINT
+ min_value_mB -8400
+ max_value_mB 4000
+ default_value_mB 0
+ step_value_mB 100
+ }
+ }
+ }
+ }
+ outputs {
+ primary {
+ sampling_rates 48000
+ channel_masks AUDIO_CHANNEL_OUT_STEREO
+ formats AUDIO_FORMAT_PCM_16_BIT
+ devices speaker
+ flags AUDIO_OUTPUT_FLAG_PRIMARY
+ }
+ }
+ inputs {
+ primary {
+ sampling_rates 8000|16000
+ channel_masks AUDIO_CHANNEL_IN_MONO
+ formats AUDIO_FORMAT_PCM_16_BIT
+ devices AUDIO_DEVICE_IN_BUILTIN_MIC
+ }
+ }
+ }
+ r_submix {
+ global_configuration {
+ attached_input_devices AUDIO_DEVICE_IN_REMOTE_SUBMIX
+ audio_hal_version 2.0
+ }
+ outputs {
+ submix {
+ sampling_rates 48000
+ channel_masks AUDIO_CHANNEL_OUT_STEREO
+ formats AUDIO_FORMAT_PCM_16_BIT
+ devices AUDIO_DEVICE_OUT_REMOTE_SUBMIX
+ }
+ }
+ inputs {
+ submix {
+ sampling_rates 48000
+ channel_masks AUDIO_CHANNEL_IN_STEREO
+ formats AUDIO_FORMAT_PCM_16_BIT
+ devices AUDIO_DEVICE_IN_REMOTE_SUBMIX
+ }
+ }
+ }
+}
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