hathach/tinyusb
1
0
Fork 0
mirror of https://github.com/hathach/tinyusb.git synced 2025-10-14 01:58:41 +08:00
Code Issues Projects Releases Wiki Activity

Merge pull request #3266 from hathach/uac_simplify

Browse Source 
audio: simplify alt settings management
This commit is contained in:
Ha Thach
2025-09-29 09:36:57 +07:00
committed by GitHub
parent 152d25ed62 8952838a26
commit 5130850337
10 changed files with 38 additions and 143 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
examples/device/audio_4_channel_mic/src/tusb_config.h
View File

@@ -107,7 +107,6 @@ extern "C" {
#define CFG_TUD_AUDIO_FUNC_1_DESC_LEN TUD_AUDIO_MIC_FOUR_CH_DESC_LEN
#define CFG_TUD_AUDIO_FUNC_1_N_AS_INT 1
#define CFG_TUD_AUDIO_FUNC_1_CTRL_BUF_SZ 64
#define CFG_TUD_AUDIO_ENABLE_EP_IN 1

1
examples/device/audio_4_channel_mic_freertos/src/tusb_config.h
View File

@@ -113,7 +113,6 @@ extern "C" {
#define CFG_TUD_AUDIO_FUNC_1_DESC_LEN TUD_AUDIO_MIC_FOUR_CH_DESC_LEN
#define CFG_TUD_AUDIO_FUNC_1_N_AS_INT 1
#define CFG_TUD_AUDIO_FUNC_1_CTRL_BUF_SZ 64
#define CFG_TUD_AUDIO_ENABLE_EP_IN 1

1
examples/device/audio_test/src/tusb_config.h
View File

@@ -109,7 +109,6 @@ extern "C" {
#define CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE 48000
#define CFG_TUD_AUDIO_FUNC_1_DESC_LEN TUD_AUDIO_MIC_ONE_CH_DESC_LEN
#define CFG_TUD_AUDIO_FUNC_1_N_AS_INT 1 // Number of Standard AS Interface Descriptors (4.9.1) defined per audio function - this is required to be able to remember the current alternate settings of these interfaces - We restrict us here to have a constant number for all audio functions (which means this has to be the maximum number of AS interfaces an audio function has and a second audio function with less AS interfaces just wastes a few bytes)
#define CFG_TUD_AUDIO_FUNC_1_CTRL_BUF_SZ 64 // Size of control request buffer
#define CFG_TUD_AUDIO_ENABLE_EP_IN 1

1
examples/device/audio_test_freertos/src/tusb_config.h
View File

@@ -115,7 +115,6 @@ extern "C" {
#define CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE 48000
#define CFG_TUD_AUDIO_FUNC_1_DESC_LEN TUD_AUDIO_MIC_ONE_CH_DESC_LEN
#define CFG_TUD_AUDIO_FUNC_1_N_AS_INT 1 // Number of Standard AS Interface Descriptors (4.9.1) defined per audio function - this is required to be able to remember the current alternate settings of these interfaces - We restrict us here to have a constant number for all audio functions (which means this has to be the maximum number of AS interfaces an audio function has and a second audio function with less AS interfaces just wastes a few bytes)
#define CFG_TUD_AUDIO_FUNC_1_CTRL_BUF_SZ 64 // Size of control request buffer
#define CFG_TUD_AUDIO_ENABLE_EP_IN 1

1
examples/device/audio_test_multi_rate/src/tusb_config.h
View File

@@ -123,7 +123,6 @@ extern "C" {
// Have a look into audio_device.h for all configurations
#define CFG_TUD_AUDIO_FUNC_1_DESC_LEN TUD_AUDIO_MIC_ONE_CH_2_FORMAT_DESC_LEN
#define CFG_TUD_AUDIO_FUNC_1_N_AS_INT 1 // Number of Standard AS Interface Descriptors (4.9.1) defined per audio function - this is required to be able to remember the current alternate settings of these interfaces - We restrict us here to have a constant number for all audio functions (which means this has to be the maximum number of AS interfaces an audio function has and a second audio function with less AS interfaces just wastes a few bytes)
#define CFG_TUD_AUDIO_FUNC_1_CTRL_BUF_SZ 64 // Size of control request buffer
#define CFG_TUD_AUDIO_ENABLE_EP_IN 1

3
examples/device/cdc_uac2/src/tusb_config.h
View File

@@ -157,9 +157,6 @@ extern "C" {
#define CFG_TUD_AUDIO_FUNC_1_EP_OUT_SZ_MAX TU_MAX(CFG_TUD_AUDIO_FUNC_1_FORMAT_1_EP_SZ_OUT, CFG_TUD_AUDIO_FUNC_1_FORMAT_1_EP_SZ_OUT) // Maximum EP IN size for all AS alternate settings used
#define CFG_TUD_AUDIO_FUNC_1_EP_OUT_SW_BUF_SZ (TUD_OPT_HIGH_SPEED ? 32 : 4) * CFG_TUD_AUDIO_FUNC_1_EP_OUT_SZ_MAX // Example read FIFO every 1ms, so it should be 8 times larger for HS device
// Number of Standard AS Interface Descriptors (4.9.1) defined per audio function - this is required to be able to remember the current alternate settings of these interfaces - We restrict us here to have a constant number for all audio functions (which means this has to be the maximum number of AS interfaces an audio function has and a second audio function with less AS interfaces just wastes a few bytes)
#define CFG_TUD_AUDIO_FUNC_1_N_AS_INT 2
// Size of control request buffer
#define CFG_TUD_AUDIO_FUNC_1_CTRL_BUF_SZ 64

3
examples/device/uac2_headset/src/tusb_config.h
View File

@@ -158,9 +158,6 @@ extern "C" {
#define CFG_TUD_AUDIO_FUNC_1_EP_OUT_SZ_MAX TU_MAX(CFG_TUD_AUDIO_FUNC_1_FORMAT_1_EP_SZ_OUT, CFG_TUD_AUDIO_FUNC_1_FORMAT_2_EP_SZ_OUT) // Maximum EP IN size for all AS alternate settings used
#define CFG_TUD_AUDIO_FUNC_1_EP_OUT_SW_BUF_SZ (TUD_OPT_HIGH_SPEED ? 32 : 4) * CFG_TUD_AUDIO_FUNC_1_EP_OUT_SZ_MAX // Example read FIFO every 1ms, so it should be 8 times larger for HS device
// Number of Standard AS Interface Descriptors (4.9.1) defined per audio function - this is required to be able to remember the current alternate settings of these interfaces - We restrict us here to have a constant number for all audio functions (which means this has to be the maximum number of AS interfaces an audio function has and a second audio function with less AS interfaces just wastes a few bytes)
#define CFG_TUD_AUDIO_FUNC_1_N_AS_INT 2
// Size of control request buffer
#define CFG_TUD_AUDIO_FUNC_1_CTRL_BUF_SZ 64

5
examples/device/uac2_speaker_fb/src/tusb_config.h
View File

@@ -130,7 +130,7 @@ extern "C" {
#define CFG_TUD_AUDIO_FUNC_1_DESC_LEN TUD_AUDIO_SPEAKER_STEREO_FB_DESC_LEN
// Enable if Full-Speed on OSX, also set feedback EP size to 3
// Can be enabled with Full-Speed device on OSX, which forces feedback EP size to 3, in this case CFG_QUIRK_OS_GUESSING can be disabled
#define CFG_TUD_AUDIO_ENABLE_FEEDBACK_FORMAT_CORRECTION 0
// Audio format type I specifications
@@ -155,9 +155,6 @@ extern "C" {
// Enable feedback EP
#define CFG_TUD_AUDIO_ENABLE_FEEDBACK_EP 1
// Number of Standard AS Interface Descriptors (4.9.1) defined per audio function - this is required to be able to remember the current alternate settings of these interfaces - We restrict us here to have a constant number for all audio functions (which means this has to be the maximum number of AS interfaces an audio function has and a second audio function with less AS interfaces just wastes a few bytes)
#define CFG_TUD_AUDIO_FUNC_1_N_AS_INT 1
// Size of control request buffer
#define CFG_TUD_AUDIO_FUNC_1_CTRL_BUF_SZ 64

150
src/class/audio/audio_device.c
View File

@@ -192,17 +192,6 @@ tu_static CFG_TUD_MEM_SECTION struct {
#endif
} ctrl_buf;
// Active alternate setting of interfaces
tu_static uint8_t alt_setting_1[CFG_TUD_AUDIO_FUNC_1_N_AS_INT];
#if CFG_TUD_AUDIO > 1 && CFG_TUD_AUDIO_FUNC_2_N_AS_INT > 0
tu_static uint8_t alt_setting_2[CFG_TUD_AUDIO_FUNC_2_N_AS_INT];
#endif
#if CFG_TUD_AUDIO > 2 && CFG_TUD_AUDIO_FUNC_3_N_AS_INT > 0
tu_static uint8_t alt_setting_3[CFG_TUD_AUDIO_FUNC_3_N_AS_INT];
#endif
// Aligned buffer for feedback EP
#if CFG_TUD_AUDIO_ENABLE_EP_OUT && CFG_TUD_AUDIO_ENABLE_FEEDBACK_EP
tu_static CFG_TUD_MEM_SECTION struct {
@@ -234,13 +223,14 @@ typedef struct
uint8_t ep_in; // TX audio data EP.
uint16_t ep_in_sz; // Current size of TX EP
uint8_t ep_in_as_intf_num;// Corresponding Standard AS Interface Descriptor (4.9.1) belonging to output terminal to which this EP belongs - 0 is invalid (this fits to UAC2 specification since AS interfaces can not have interface number equal to zero)
#endif
uint8_t ep_in_alt; // Current alternate setting of TX EP
#endif
#if CFG_TUD_AUDIO_ENABLE_EP_OUT
uint8_t ep_out; // Incoming (into uC) audio data EP.
uint16_t ep_out_sz; // Current size of RX EP
uint8_t ep_out_as_intf_num;// Corresponding Standard AS Interface Descriptor (4.9.1) belonging to input terminal to which this EP belongs - 0 is invalid (this fits to UAC2 specification since AS interfaces can not have interface number equal to zero)
uint8_t ep_out_alt; // Current alternate setting of RX EP
#if CFG_TUD_AUDIO_ENABLE_FEEDBACK_EP
uint8_t ep_fb;// Feedback EP.
#endif
@@ -304,9 +294,6 @@ typedef struct
uint8_t *ctrl_buf;
uint8_t ctrl_buf_sz;
// Current active alternate settings
uint8_t *alt_setting;// We need to save the current alternate setting this way, because it is possible that there are AS interfaces which do not have an EP!
// EP Transfer buffers and FIFOs
#if CFG_TUD_AUDIO_ENABLE_EP_OUT
tu_fifo_t ep_out_ff;
@@ -475,8 +462,6 @@ static bool audiod_tx_xfer_isr(uint8_t rhport, audiod_function_t* audio, uint16_
static bool audiod_get_interface(uint8_t rhport, tusb_control_request_t const *p_request);
static bool audiod_set_interface(uint8_t rhport, tusb_control_request_t const *p_request);
static bool audiod_get_AS_interface_index_global(uint8_t itf, uint8_t *func_id, uint8_t *idxItf, uint8_t const **pp_desc_int);
static bool audiod_get_AS_interface_index(uint8_t itf, audiod_function_t *audio, uint8_t *idxItf, uint8_t const **pp_desc_int);
static bool audiod_verify_entity_exists(uint8_t itf, uint8_t entityID, uint8_t *func_id);
static bool audiod_verify_itf_exists(uint8_t itf, uint8_t *func_id);
static bool audiod_verify_ep_exists(uint8_t ep, uint8_t *func_id);
@@ -529,11 +514,7 @@ tu_fifo_t *tud_audio_n_get_ep_out_ff(uint8_t func_id) {
}
static bool audiod_rx_xfer_isr(uint8_t rhport, audiod_function_t* audio, uint16_t n_bytes_received) {
uint8_t idxItf;
uint8_t const *dummy2;
uint8_t idx_audio_fct = audiod_get_audio_fct_idx(audio);
TU_VERIFY(audiod_get_AS_interface_index(audio->ep_out_as_intf_num, audio, &idxItf, &dummy2));
#if USE_LINEAR_BUFFER_RX
// Data currently is in linear buffer, copy into EP OUT FIFO
@@ -553,7 +534,7 @@ static bool audiod_rx_xfer_isr(uint8_t rhport, audiod_function_t* audio, uint16_
#endif
// Call a weak callback here - a possibility for user to get informed an audio packet was received and data gets now loaded into EP FIFO
TU_VERIFY(tud_audio_rx_done_isr(rhport, n_bytes_received, idx_audio_fct, audio->ep_out, audio->alt_setting[idxItf]));
TU_VERIFY(tud_audio_rx_done_isr(rhport, n_bytes_received, idx_audio_fct, audio->ep_out, audio->ep_out_alt));
return true;
}
@@ -584,14 +565,10 @@ tu_fifo_t *tud_audio_n_get_ep_in_ff(uint8_t func_id) {
}
static bool audiod_tx_xfer_isr(uint8_t rhport, audiod_function_t * audio, uint16_t n_bytes_sent) {
uint8_t idxItf;
uint8_t const *dummy2;
uint8_t idx_audio_fct = audiod_get_audio_fct_idx(audio);
TU_VERIFY(audiod_get_AS_interface_index(audio->ep_in_as_intf_num, audio, &idxItf, &dummy2));
// Only send something if current alternate interface is not 0 as in this case nothing is to be sent due to UAC2 specifications
if (audio->alt_setting[idxItf] == 0) { return false; }
if (audio->ep_in_alt == 0) { return false; }
// Send everything in ISO EP FIFO
uint16_t n_bytes_tx;
@@ -611,7 +588,7 @@ static bool audiod_tx_xfer_isr(uint8_t rhport, audiod_function_t * audio, uint16
#endif
// Call a weak callback here - a possibility for user to get informed former TX was completed and data gets now loaded into EP in buffer
TU_VERIFY(tud_audio_tx_done_isr(rhport, n_bytes_sent, idx_audio_fct, audio->ep_in, audio->alt_setting[idxItf]));
TU_VERIFY(tud_audio_tx_done_isr(rhport, n_bytes_sent, idx_audio_fct, audio->ep_in, audio->ep_in_alt));
return true;
}
@@ -704,25 +681,6 @@ void audiod_init(void) {
#endif
}
// Initialize active alternate interface buffers
switch (i) {
#if CFG_TUD_AUDIO_FUNC_1_N_AS_INT > 0
case 0:
audio->alt_setting = alt_setting_1;
break;
#endif
#if CFG_TUD_AUDIO > 1 && CFG_TUD_AUDIO_FUNC_2_N_AS_INT > 0
case 1:
audio->alt_setting = alt_setting_2;
break;
#endif
#if CFG_TUD_AUDIO > 2 && CFG_TUD_AUDIO_FUNC_3_N_AS_INT > 0
case 2:
audio->alt_setting = alt_setting_3;
break;
#endif
}
// Initialize IN EP FIFO if required
#if CFG_TUD_AUDIO_ENABLE_EP_IN
@@ -1029,13 +987,25 @@ static bool audiod_get_interface(uint8_t rhport, tusb_control_request_t const *p
uint8_t const itf = tu_u16_low(p_request->wIndex);
// Find index of audio streaming interface
uint8_t func_id, idxItf;
uint8_t const *dummy;
uint8_t func_id;
TU_VERIFY(audiod_verify_itf_exists(itf, &func_id));
TU_VERIFY(audiod_get_AS_interface_index_global(itf, &func_id, &idxItf, &dummy));
TU_VERIFY(tud_control_xfer(rhport, p_request, &_audiod_fct[func_id].alt_setting[idxItf], 1));
// Default to 0 if interface not yet activated
uint8_t alt = 0;
#if CFG_TUD_AUDIO_ENABLE_EP_IN
if (_audiod_fct[func_id].ep_in_as_intf_num == itf) {
alt = _audiod_fct[func_id].ep_in_alt;
}
#endif
#if CFG_TUD_AUDIO_ENABLE_EP_OUT
if (_audiod_fct[func_id].ep_out_as_intf_num == itf) {
alt = _audiod_fct[func_id].ep_out_alt;
}
#endif
TU_LOG2(" Get itf: %u - current alt: %u\r\n", itf, _audiod_fct[func_id].alt_setting[idxItf]);
TU_VERIFY(tud_control_xfer(rhport, p_request, &alt, 1));
TU_LOG2(" Get itf: %u - current alt: %u\r\n", itf, alt);
return true;
}
@@ -1060,9 +1030,8 @@ static bool audiod_set_interface(uint8_t rhport, tusb_control_request_t const *p
TU_LOG2(" Set itf: %u - alt: %u\r\n", itf, alt);
// Find index of audio streaming interface and index of interface
uint8_t func_id, idxItf;
uint8_t const *p_desc;
TU_VERIFY(audiod_get_AS_interface_index_global(itf, &func_id, &idxItf, &p_desc));
uint8_t func_id;
TU_VERIFY(audiod_verify_itf_exists(itf, &func_id));
audiod_function_t *audio = &_audiod_fct[func_id];
@@ -1070,6 +1039,7 @@ static bool audiod_set_interface(uint8_t rhport, tusb_control_request_t const *p
#if CFG_TUD_AUDIO_ENABLE_EP_IN
if (audio->ep_in_as_intf_num == itf) {
audio->ep_in_as_intf_num = 0;
audio->ep_in_alt = 0;
#ifndef TUP_DCD_EDPT_ISO_ALLOC
usbd_edpt_close(rhport, audio->ep_in);
#endif
@@ -1093,6 +1063,7 @@ static bool audiod_set_interface(uint8_t rhport, tusb_control_request_t const *p
#if CFG_TUD_AUDIO_ENABLE_EP_OUT
if (audio->ep_out_as_intf_num == itf) {
audio->ep_out_as_intf_num = 0;
audio->ep_out_alt = 0;
#ifndef TUP_DCD_EDPT_ISO_ALLOC
usbd_edpt_close(rhport, audio->ep_out);
#endif
@@ -1116,10 +1087,10 @@ static bool audiod_set_interface(uint8_t rhport, tusb_control_request_t const *p
}
#endif// CFG_TUD_AUDIO_ENABLE_EP_OUT
// Save current alternative interface setting
audio->alt_setting[idxItf] = alt;
// Open new EP if necessary - EPs are only to be closed or opened for AS interfaces - Look for AS interface with correct alternate interface
uint8_t const *p_desc = tu_desc_next(audio->p_desc);
// Skip entire AC descriptor block
p_desc += ((audio_desc_cs_ac_interface_t const *) p_desc)->wTotalLength;
// Get pointer at end
uint8_t const *p_desc_end = audio->p_desc + audio->desc_length - TUD_AUDIO_DESC_IAD_LEN;
@@ -1154,6 +1125,7 @@ static bool audiod_set_interface(uint8_t rhport, tusb_control_request_t const *p
// Save address
audio->ep_in = ep_addr;
audio->ep_in_as_intf_num = itf;
audio->ep_in_alt = alt;
audio->ep_in_sz = tu_edpt_packet_size(desc_ep);
// If flow control is enabled, parse for the corresponding parameters - doing this here means only AS interfaces with EPs get scanned for parameters
@@ -1176,6 +1148,7 @@ static bool audiod_set_interface(uint8_t rhport, tusb_control_request_t const *p
// Save address
audio->ep_out = ep_addr;
audio->ep_out_as_intf_num = itf;
audio->ep_out_alt = alt;
audio->ep_out_sz = tu_edpt_packet_size(desc_ep);
// Prepare for incoming data
@@ -1474,8 +1447,7 @@ bool audiod_xfer_isr(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint
#if CFG_TUD_AUDIO_ENABLE_EP_IN
// Data transmission of audio packet finished
if (audio->ep_in == ep_addr && audio->alt_setting != 0)
{
if (audio->ep_in == ep_addr) {
// USB 2.0, section 5.6.4, third paragraph, states "An isochronous endpoint must specify its required bus access period. However, an isochronous endpoint must be prepared to handle poll rates faster than the one specified."
// That paragraph goes on to say "An isochronous IN endpoint must return a zero-length packet whenever data is requested at a faster interval than the specified interval and data is not available."
// This can only be solved reliably if we load a ZLP after every IN transmission since we can not say if the host requests samples earlier than we declared! Once all samples are collected we overwrite the loaded ZLP.
@@ -1492,8 +1464,7 @@ bool audiod_xfer_isr(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint
#if CFG_TUD_AUDIO_ENABLE_EP_OUT
// New audio packet received
if (audio->ep_out == ep_addr)
{
if (audio->ep_out == ep_addr) {
audiod_rx_xfer_isr(rhport, audio, (uint16_t) xferred_bytes);
return true;
}
@@ -1694,53 +1665,6 @@ bool tud_audio_buffer_and_schedule_control_xfer(uint8_t rhport, tusb_control_req
return tud_control_xfer(rhport, p_request, (void *) _audiod_fct[func_id].ctrl_buf, len);
}
// This helper function finds for a given audio function and AS interface number the index of the attached driver structure, the index of the interface in the audio function
// (e.g. the std. AS interface with interface number 15 is the first AS interface for the given audio function and thus gets index zero), and
// finally a pointer to the std. AS interface, where the pointer always points to the first alternate setting i.e. alternate interface zero.
static bool audiod_get_AS_interface_index(uint8_t itf, audiod_function_t *audio, uint8_t *idxItf, uint8_t const **pp_desc_int) {
if (audio->p_desc) {
// Get pointer at end
uint8_t const *p_desc_end = audio->p_desc + audio->desc_length - TUD_AUDIO_DESC_IAD_LEN;
// Advance past AC descriptors
uint8_t const *p_desc = tu_desc_next(audio->p_desc);
p_desc += ((audio_desc_cs_ac_interface_t const *) p_desc)->wTotalLength;
uint8_t tmp = 0;
// Condition modified from p_desc < p_desc_end to prevent gcc>=12 strict-overflow warning
while (p_desc_end - p_desc > 0) {
// We assume the number of alternate settings is increasing thus we return the index of alternate setting zero!
if (tu_desc_type(p_desc) == TUSB_DESC_INTERFACE && ((tusb_desc_interface_t const *) p_desc)->bAlternateSetting == 0) {
if (((tusb_desc_interface_t const *) p_desc)->bInterfaceNumber == itf) {
*idxItf = tmp;
*pp_desc_int = p_desc;
return true;
}
// Increase index, bytes read, and pointer
tmp++;
}
p_desc = tu_desc_next(p_desc);
}
}
return false;
}
// This helper function finds for a given AS interface number the index of the attached driver structure, the index of the interface in the audio function
// (e.g. the std. AS interface with interface number 15 is the first AS interface for the given audio function and thus gets index zero), and
// finally a pointer to the std. AS interface, where the pointer always points to the first alternate setting i.e. alternate interface zero.
static bool audiod_get_AS_interface_index_global(uint8_t itf, uint8_t *func_id, uint8_t *idxItf, uint8_t const **pp_desc_int) {
// Loop over audio driver interfaces
uint8_t i;
for (i = 0; i < CFG_TUD_AUDIO; i++) {
if (audiod_get_AS_interface_index(itf, &_audiod_fct[i], idxItf, pp_desc_int)) {
*func_id = i;
return true;
}
}
return false;
}
// Verify an entity with the given ID exists and returns also the corresponding driver index
static bool audiod_verify_entity_exists(uint8_t itf, uint8_t entityID, uint8_t *func_id) {
uint8_t i;
@@ -1754,8 +1678,8 @@ static bool audiod_verify_entity_exists(uint8_t itf, uint8_t entityID, uint8_t *
// Condition modified from p_desc < p_desc_end to prevent gcc>=12 strict-overflow warning
while (p_desc_end - p_desc > 0) {
if (p_desc[3] == entityID)// Entity IDs are always at offset 3
{
// Entity IDs are always at offset 3
if (p_desc[3] == entityID) {
*func_id = i;
return true;
}
@@ -1775,7 +1699,7 @@ static bool audiod_verify_itf_exists(uint8_t itf, uint8_t *func_id) {
uint8_t const *p_desc_end = _audiod_fct[i].p_desc + _audiod_fct[i].desc_length - TUD_AUDIO_DESC_IAD_LEN;
// Condition modified from p_desc < p_desc_end to prevent gcc>=12 strict-overflow warning
while (p_desc_end - p_desc > 0) {
if (tu_desc_type(p_desc) == TUSB_DESC_INTERFACE && ((tusb_desc_interface_t const *) _audiod_fct[i].p_desc)->bInterfaceNumber == itf) {
if (tu_desc_type(p_desc) == TUSB_DESC_INTERFACE && ((tusb_desc_interface_t const *)p_desc)->bInterfaceNumber == itf) {
*func_id = i;
return true;
}

15
src/class/audio/audio_device.h
View File

@@ -51,21 +51,6 @@
#endif
#endif
// Number of Standard AS Interface Descriptors (4.9.1) defined per audio function - this is required to be able to remember the current alternate settings of these interfaces
#ifndef CFG_TUD_AUDIO_FUNC_1_N_AS_INT
#error You must tell the driver the number of Standard AS Interface Descriptors you have defined in the audio function descriptor!
#endif
#if CFG_TUD_AUDIO > 1
#ifndef CFG_TUD_AUDIO_FUNC_2_N_AS_INT
#error You must tell the driver the number of Standard AS Interface Descriptors you have defined in the audio function descriptor!
#endif
#endif
#if CFG_TUD_AUDIO > 2
#ifndef CFG_TUD_AUDIO_FUNC_3_N_AS_INT
#error You must tell the driver the number of Standard AS Interface Descriptors you have defined in the audio function descriptor!
#endif
#endif
// Size of control buffer used to receive and send control messages via EP0 - has to be big enough to hold your biggest request structure e.g. range requests with multiple intervals defined or cluster descriptors
#ifndef CFG_TUD_AUDIO_FUNC_1_CTRL_BUF_SZ
#error You must define an audio class control request buffer size!