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The owner of this website (www.51xuedu.com) has banned your access based on your browser's signature (433bf93a65aa98ef-ua98).打开游戏过一会就弹出这个Failed to load:audio/bgs/%E5%BF%83%87%93%E3%81%AE%E9%BC%93%E5%8B%95.ogg_百度知道
打开游戏过一会就弹出这个Failed to load:audio/bgs/%E5%BF%83%87%93%E3%81%AE%E9%BC%93%E5%8B%95.ogg
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到安全模式杀毒及清除恶意插件对所有磁盘进行错误扫描游戏卸载后重新安装一下声卡驱动卸载后重新下载稳定版本再安装一下
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我们会通过消息、邮箱等方式尽快将举报结果通知您。05-1502-1602-1602-1602-1602-1602-1602-1602-1602-16最新范文01-0101-0101-0101-0101-0101-0101-0101-0101-0101-0101-0101-0101-0101-0101-01audio_policy.conf文件分析
不同的Android产品在音频的设计上通常是存在差异的，而这些差异可以同过Audio的配置文件audio_policy.conf来获得。在Android系统中音频配置文件存放路径有两处，存放地址可以从AudioPolicyManagerBase.cpp文件中知道：
#define AUDIO_POLICY_VENDOR_CONFIG_FILE
"/vendor/etc/audio_policy.conf"
#define AUDIO_POLICY_CONFIG_FILE
"/system/etc/audio_policy.conf"
　　在AudioPolicyManager.cpp文件中可以知道系统会首先加载vendor/etc目录下的configure文件，再加载system/etc目录下的configure文件。若这两者加载都发生错误的话，系统会加载default配置文件，并命名为primary module，从这可以看出，音频系统中一定必须存在的module就是primary了。
if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
ALOGE("could not load audio policy configuration file, setting defaults");
defaultAudioPolicyConfig();
　　【摘录audio_policy.conf】　
1 # Global configuration section: lists input and output devices always present on the device
2 # as well as the output device selected by default.
3 # Devices are designated by a string that corresponds to the enum in audio.h
5 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_VOICE_CALL|AUDIO_DEVICE_IN_REMOTE_SUBMIX
custom_properties {
voice_volume_applied_after_mixing_in_call true
voice_volume_applied_after_mixing_in_communication false
in_call_music_attenuation_dB 6
16 # audio hardware module section: contains descriptors for all audio hw modules present on the
17 # device. Each hw module node is named after the corresponding hw module library base name.
18 # For instance, "primary" corresponds to audio.primary.&device&.so.
19 # The "primary" module is mandatory and must include at least one output with
20 # AUDIO_OUTPUT_FLAG_PRIMARY flag.
21 # Each module descriptor contains one or more output profile descriptors and zero or more
22 # input profile descriptors. Each profile lists all the parameters supported by a given output
23 # or input stream category.
24 # The "channel_masks", "formats", "devices" and "flags" are specified using strings corresponding
25 # to enums in audio.h and audio_policy.h. They are concatenated by use of "|" without space or "\n".
27 audio_hw_modules {
sampling_rates 48000
channel_masks AUDIO_CHANNEL_OUT_STEREO
formats AUDIO_FORMAT_PCM_16_BIT
devices AUDIO_DEVICE_OUT_SPEAKER|AUDIO_DEVICE_OUT_WIRED_HEADSET|AUDIO_DEVICE_OUT_WIRED_HEADPHONE|AUDIO_DEVICE_OUT_ALL_SCO
flags AUDIO_OUTPUT_FLAG_PRIMARY
deep_buffer {
sampling_rates 48000
channel_masks AUDIO_CHANNEL_OUT_STEREO
formats AUDIO_FORMAT_PCM_16_BIT
devices AUDIO_DEVICE_OUT_SPEAKER|AUDIO_DEVICE_OUT_WIRED_HEADSET|AUDIO_DEVICE_OUT_WIRED_HEADPHONE
flags AUDIO_OUTPUT_FLAG_DEEP_BUFFER
sampling_rates 8000|11025|12000|16000|22050|24000|32000|44100|48000
channel_masks AUDIO_CHANNEL_IN_MONO|AUDIO_CHANNEL_IN_STEREO
formats AUDIO_FORMAT_PCM_16_BIT
devices AUDIO_DEVICE_IN_BUILTIN_MIC|AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET|AUDIO_DEVICE_IN_WIRED_HEADSET|AUDIO_DEVICE_IN_VOICE_CALL
sampling_rates 44100
channel_masks AUDIO_CHANNEL_OUT_STEREO
formats AUDIO_FORMAT_PCM_16_BIT
devices AUDIO_DEVICE_OUT_ALL_A2DP
hdmi_stereo {
sampling_rates 48000
channel_masks AUDIO_CHANNEL_OUT_STEREO
formats AUDIO_FORMAT_PCM_16_BIT
devices AUDIO_DEVICE_OUT_AUX_DIGITAL
hdmi_multi {
sampling_rates 32000|44100|48000|88200|96000
# channel_masks AUDIO_CHANNEL_OUT_5POINT1
channel_masks dynamic
formats AUDIO_FORMAT_PCM_16_BIT
devices AUDIO_DEVICE_OUT_AUX_DIGITAL
flags AUDIO_OUTPUT_FLAG_DIRECT
r_submix {
sampling_rates 48000
channel_masks AUDIO_CHANNEL_OUT_STEREO
formats AUDIO_FORMAT_PCM_16_BIT
devices AUDIO_DEVICE_OUT_REMOTE_SUBMIX
sampling_rates 48000
channel_masks AUDIO_CHANNEL_IN_STEREO
formats AUDIO_FORMAT_PCM_16_BIT
devices AUDIO_DEVICE_IN_REMOTE_SUBMIX
usb_dgtl {
sampling_rates 44100|48000
channel_masks AUDIO_CHANNEL_OUT_STEREO
formats AUDIO_FORMAT_PCM_16_BIT
devices AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET
usb_accessory {
sampling_rates 44100
channel_masks AUDIO_CHANNEL_OUT_STEREO
formats AUDIO_FORMAT_PCM_16_BIT
devices AUDIO_DEVICE_OUT_USB_ACCESSORY
usb_device {
sampling_rates 44100
channel_masks AUDIO_CHANNEL_OUT_STEREO
formats AUDIO_FORMAT_PCM_16_BIT
devices AUDIO_DEVICE_OUT_USB_DEVICE
　　从audio_policy.conf文件中可以发现，系统包含了primary、a2dp、usb等音频接口，对应着系统中的audio.&primary/a2dp/usb&.&device&.so。每个音频接口中又包含了若干个outputs & inputs，并且每个output or input又包含了若干个devices，且还有采样频率，声道数等信息。这些devices信息、采样频率信息 &
声道信息等都会保存在各自module的IOProfile中。按上文中audio_policy.conf配置文件所描述，系统最后会生成6个modules(eg.primary,a2dp,hdmi,r_submix,hs_usb & usb)以及7个outputs。以AUDIO_DEVICE_OUT_SPEAKER为例，该device会定义在primary模块中outputs所属的IOProfile1中，其它设备依次类推。
　　根据audio_policy.conf文件可以简化Audio module的架构，如下图1所示：
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