Merge remote-tracking branch 'origin/uac2' into uac2

3 files changed, 12 insertions, 4 deletions

diff --git a/src/class/audio/audio.h b/src/class/audio/audio.h
index f4f460c22..022f3118f 100644
--- a/src/class/audio/audio.h
+++ b/src/class/audio/audio.h
@@ -57,6 +57,12 @@ typedef enum
 	AUDIO_SUBCLASS_MIDI_STREAMING  , ///< MIDI Streaming
 } audio_subclass_type_t;
 
+/// Audio Function Subclass Codes
+typedef enum
+{
+	AUDIO_FUNCTION_SUBCLASS_UNDEFINED = 0x00,
+} audio_function_subclass_type_t;
+
 /// Audio Protocol Codes
 typedef enum
 {
diff --git a/src/class/audio/audio_device.c b/src/class/audio/audio_device.c
index fbd412564..1c9e0494e 100644
--- a/src/class/audio/audio_device.c
+++ b/src/class/audio/audio_device.c
@@ -632,7 +632,7 @@ void audiod_reset(uint8_t rhport)
 	}
 }
 
-bool audiod_open(uint8_t rhport, tusb_desc_interface_t const * itf_desc, uint16_t *p_length)
+uint16_t audiod_open(uint8_t rhport, tusb_desc_interface_t const * itf_desc, uint16_t max_len)
 {
 	TU_VERIFY ( TUSB_CLASS_AUDIO 	== itf_desc->bInterfaceClass &&
 			AUDIO_SUBCLASS_CONTROL	== itf_desc->bInterfaceSubClass);
@@ -666,9 +666,11 @@ bool audiod_open(uint8_t rhport, tusb_desc_interface_t const * itf_desc, uint16_
 	// This is all we need so far - the EPs are setup by a later set_interface request (as per UAC2 specification)
 
 	// Notify caller we read complete descriptor
-	(*p_length) += tud_audio_desc_lengths[i];
+//	(*p_length) += tud_audio_desc_lengths[i];
+	// TODO: Find a way to find end of current audio function and avoid necessity of tud_audio_desc_lengths - since now max_length is available we could do this surely somehow
+	uint16_t drv_len = tud_audio_desc_lengths[i] - TUD_AUDIO_DESC_IAD_LEN; 	// - TUD_AUDIO_DESC_IAD_LEN since tinyUSB already handles the IAD descriptor
 
-	return true;
+	return drv_len;
 }
 
 static bool audiod_get_interface(uint8_t rhport, tusb_control_request_t const * p_request)
diff --git a/src/class/audio/audio_device.h b/src/class/audio/audio_device.h
index 5354adbd4..3e1fa7a92 100644
--- a/src/class/audio/audio_device.h
+++ b/src/class/audio/audio_device.h
@@ -289,7 +289,7 @@ inline uint16_t tud_audio_int_ctr_write(uint8_t const* buffer, uint16_t bufsize)
 //--------------------------------------------------------------------+
 void audiod_init             (void);
 void audiod_reset            (uint8_t rhport);
-bool audiod_open             (uint8_t rhport, tusb_desc_interface_t const * itf_desc, uint16_t *p_length);
+uint16_t audiod_open		 (uint8_t rhport, tusb_desc_interface_t const * itf_desc, uint16_t max_len);
 bool audiod_control_request  (uint8_t rhport, tusb_control_request_t const * request);
 bool audiod_control_complete (uint8_t rhport, tusb_control_request_t const * request);
 bool audiod_xfer_cb          (uint8_t rhport, uint8_t edpt_addr, xfer_result_t result, uint32_t xferred_bytes);