diff options
| author | Mark K Cowan <[email protected]> | 2022-10-23 02:55:28 +0300 |
|---|---|---|
| committer | Mark K Cowan <[email protected]> | 2022-10-23 13:38:24 +0300 |
| commit | f931983469bf375eec9503b99e021b9b633bf23f (patch) | |
| tree | 4cb7349ccbade0cbf144fc3fec750f93f4ad9cd9 /src/class/audio/audio_device.h | |
| parent | 55db123a85d464462562f4c64efa8d6ff5734dce (diff) | |
UAC2 supports interrupt-endpoint for providing control-change notifications to the host
Diffstat (limited to 'src/class/audio/audio_device.h')
| -rw-r--r-- | src/class/audio/audio_device.h | 46 |
1 files changed, 41 insertions, 5 deletions
diff --git a/src/class/audio/audio_device.h b/src/class/audio/audio_device.h index 0ef100fa4..0c394d235 100644 --- a/src/class/audio/audio_device.h +++ b/src/class/audio/audio_device.h @@ -191,9 +191,19 @@ #define CFG_TUD_AUDIO_ENABLE_FEEDBACK_FORMAT_CORRECTION 0 // 0 or 1 #endif +// Enable/disable interrupt EP (required for notifying host of control changes) +#ifndef CFG_TUD_AUDIO_ENABLE_INTERRUPT_EP +#define CFG_TUD_AUDIO_ENABLE_INTERRUPT_EP 0 // Feedback - 0 or 1 +#endif + // Audio interrupt control EP size - disabled if 0 #ifndef CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN -#define CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN 0 // Audio interrupt control - if required - 6 Bytes according to UAC 2 specification (p. 74) +// Audio interrupt control - if required - 6 Bytes according to UAC 2 specification (p. 74) +#if CFG_TUD_AUDIO_ENABLE_INTERRUPT_EP +#define CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN 6 +#else +#define CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN 0 +#endif #endif #ifndef CFG_TUD_AUDIO_INT_CTR_EP_IN_SW_BUFFER_SIZE @@ -388,7 +398,7 @@ uint16_t tud_audio_n_write_support_ff (uint8_t func_id, uint8_t ff_i tu_fifo_t* tud_audio_n_get_tx_support_ff (uint8_t func_id, uint8_t ff_idx); #endif -#if CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN +#if CFG_TUD_AUDIO_ENABLE_INTERRUPT_EP uint16_t tud_audio_int_ctr_n_write (uint8_t func_id, uint8_t const* buffer, uint16_t len); #endif @@ -431,7 +441,7 @@ static inline tu_fifo_t* tud_audio_get_tx_support_ff (uint8_t ff_idx); // INT CTR API -#if CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN +#if CFG_TUD_AUDIO_ENABLE_INTERRUPT_EP static inline uint16_t tud_audio_int_ctr_write (uint8_t const* buffer, uint16_t len); #endif @@ -531,7 +541,33 @@ TU_ATTR_WEAK TU_ATTR_FAST_FUNC void tud_audio_feedback_interval_isr(uint8_t func #endif // CFG_TUD_AUDIO_ENABLE_EP_OUT && CFG_TUD_AUDIO_ENABLE_FEEDBACK_EP -#if CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN +#if CFG_TUD_AUDIO_ENABLE_INTERRUPT_EP +// UAC2 ยง9.6 +// Structure of "interrupt data message" +typedef struct TU_ATTR_PACKED +{ + uint8_t bInfo; + uint8_t bAttribute; + union TU_ATTR_PACKED + { + uint16_t wValue; + struct TU_ATTR_PACKED + { + uint8_t wValue_cn_or_mcn; + uint8_t wValue_cs; + }; + }; + union TU_ATTR_PACKED + { + uint16_t wIndex; + struct TU_ATTR_PACKED + { + uint8_t wIndex_ep_or_int; + uint8_t wIndex_entity_id; + }; + }; +} audio_status_update_t; + TU_ATTR_WEAK bool tud_audio_int_ctr_done_cb(uint8_t rhport, uint16_t n_bytes_copied); #endif @@ -663,7 +699,7 @@ static inline tu_fifo_t* tud_audio_get_tx_support_ff(uint8_t ff_idx) #endif -#if CFG_TUD_AUDIO_INT_CTR_EPSIZE_IN +#if CFG_TUD_AUDIO_ENABLE_INTERRUPT_EP static inline uint16_t tud_audio_int_ctr_write(uint8_t const* buffer, uint16_t len) { return tud_audio_int_ctr_n_write(0, buffer, len); |