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You In Here : //proc/self/root/usr/include/linux/baSourceID[desc->bNrInPins + 4]; case UAC_VERSION_2: return 1; /* in UAC2, this value is constant */ case UAC_VERSION_3: return 4; /* in UAC3, this value is constant */ default: return 1; } } static __inline__ __u8 uac_extension_unit_iExtension(struct uac_processing_unit_descriptor *desc, int protocol) { __u8 control_size = uac_extension_unit_bControlSize(desc, protocol); switch (protocol) { case UAC_VERSION_1: case UAC_VERSION_2: default: return *(uac_processing_unit_bmControls(desc, protocol) + control_size); case UAC_VERSION_3: return 0; /* UAC3 does not have this field */ } } /* 4.5.2 Class-Specific AS Interface Descriptor */ struct uac1_as_header_descriptor { __u8 bLength; /* in bytes: 7 */ __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ __u8 bDescriptorSubtype; /* AS_GENERAL */ __u8 bTerminalLink; /* Terminal ID of connected Terminal */ __u8 bDelay; /* Delay introduced by the data path */ __le16 wFormatTag; /* The Audio Data Format */ } __attribute__ ((packed)); #define UAC_DT_AS_HEADER_SIZE 7 /* Formats - A.1.1 Audio Data Format Type I Codes */ #define UAC_FORMAT_TYPE_I_UNDEFINED 0x0 #define UAC_FORMAT_TYPE_I_PCM 0x1 #define UAC_FORMAT_TYPE_I_PCM8 0x2 #define UAC_FORMAT_TYPE_I_IEEE_FLOAT 0x3 #define UAC_FORMAT_TYPE_I_ALAW 0x4 #define UAC_FORMAT_TYPE_I_MULAW 0x5 struct uac_format_type_i_continuous_descriptor { __u8 bLength; /* in bytes: 8 + (ns * 3) */ __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ __u8 bDescriptorSubtype; /* FORMAT_TYPE */ __u8 bFormatType; /* FORMAT_TYPE_1 */ __u8 bNrChannels; /* physical channels in the stream */ __u8 bSubframeSize; /* */ __u8 bBitResolution; __u8 bSamFreqType; __u8 tLowerSamFreq[3]; __u8 tUpperSamFreq[3]; } __attribute__ ((packed)); #define UAC_FORMAT_TYPE_I_CONTINUOUS_DESC_SIZE 14 struct uac_format_type_i_discrete_descriptor { __u8 bLength; /* in bytes: 8 + (ns * 3) */ __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ __u8 bDescriptorSubtype; /* FORMAT_TYPE */ __u8 bFormatType; /* FORMAT_TYPE_1 */ __u8 bNrChannels; /* physical channels in the stream */ __u8 bSubframeSize; /* */ __u8 bBitResolution; __u8 bSamFreqType; __u8 tSamFreq[][3]; } __attribute__ ((packed)); #define DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(n) \ struct uac_format_type_i_discrete_descriptor_##n { \ __u8 bLength; \ __u8 bDescriptorType; \ __u8 bDescriptorSubtype; \ __u8 bFormatType; \ __u8 bNrChannels; \ __u8 bSubframeSize; \ __u8 bBitResolution; \ __u8 bSamFreqType; \ __u8 tSamFreq[n][3]; \ } __attribute__ ((packed)) #define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3)) struct uac_format_type_i_ext_descriptor { __u8 bLength; __u8 bDescriptorType; __u8 bDescriptorSubtype; __u8 bFormatType; __u8 bSubslotSize; __u8 bBitResolution; __u8 bHeaderLength; __u8 bControlSize; __u8 bSideBandProtocol; } __attribute__((packed)); /* Formats - Audio Data Format Type I Codes */ #define UAC_FORMAT_TYPE_II_MPEG 0x1001 #define UAC_FORMAT_TYPE_II_AC3 0x1002 struct uac_format_type_ii_discrete_descriptor { __u8 bLength; __u8 bDescriptorType; __u8 bDescriptorSubtype; __u8 bFormatType; __le16 wMaxBitRate; __le16 wSamplesPerFrame; __u8 bSamFreqType; __u8 tSamFreq[][3]; } __attribute__((packed)); struct uac_format_type_ii_ext_descriptor { __u8 bLength; __u8 bDescriptorType; __u8 bDescriptorSubtype; __u8 bFormatType; __le16 wMaxBitRate; __le16 wSamplesPerFrame; __u8 bHeaderLength; __u8 bSideBandProtocol; } __attribute__((packed)); /* type III */ #define UAC_FORMAT_TYPE_III_IEC1937_AC3 0x2001 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG1_LAYER1 0x2002 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_NOEXT 0x2003 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_EXT 0x2004 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER1_LS 0x2005 #define UAC_FORMAT_TYPE_III_IEC1937_MPEG2_LAYER23_LS 0x2006 /* Formats - A.2 Format Type Codes */ #define UAC_FORMAT_TYPE_UNDEFINED 0x0 #define UAC_FORMAT_TYPE_I 0x1 #define UAC_FORMAT_TYPE_II 0x2 #define UAC_FORMAT_TYPE_III 0x3 #define UAC_EXT_FORMAT_TYPE_I 0x81 #define UAC_EXT_FORMAT_TYPE_II 0x82 #define UAC_EXT_FORMAT_TYPE_III 0x83 struct uac_iso_endpoint_descriptor { __u8 bLength; /* in bytes: 7 */ __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */ __u8 bDescriptorSubtype; /* EP_GENERAL */ __u8 bmAttributes; __u8 bLockDelayUnits; __le16 wLockDelay; } __attribute__((packed)); #define UAC_ISO_ENDPOINT_DESC_SIZE 7 #define UAC_EP_CS_ATTR_SAMPLE_RATE 0x01 #define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02 #define UAC_EP_CS_ATTR_FILL_MAX 0x80 /* status word format (3.7.1.1) */ #define UAC1_STATUS_TYPE_ORIG_MASK 0x0f #define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF 0x0 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF 0x1 #define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP 0x2 #define UAC1_STATUS_TYPE_IRQ_PENDING (1 << 7) #define UAC1_STATUS_TYPE_MEM_CHANGED (1 << 6) struct uac1_status_word { __u8 bStatusType; __u8 bOriginator; } __attribute__((packed)); #endif /* __LINUX_USB_AUDIO_H */