diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/class/video/video_device.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/src/class/video/video_device.c b/src/class/video/video_device.c index b2375def9..d1c699940 100644 --- a/src/class/video/video_device.c +++ b/src/class/video/video_device.c @@ -70,6 +70,13 @@ typedef struct TU_ATTR_PACKED { uint8_t bEntityId; } tusb_desc_cs_video_entity_itf_t; +typedef struct TU_ATTR_PACKED { + uint8_t bLength; + uint8_t bDescriptorType; + uint8_t bDescriptorSubtype; + uint16_t wMaxTransferSize; +} tusb_desc_cs_video_vc_ep_t; + typedef union { struct TU_ATTR_PACKED { uint8_t bLength; @@ -392,7 +399,13 @@ static void const* _find_desc_ep(void const *beg, void const *end) static inline void const* _end_of_control_descriptor(void const *desc) { tusb_desc_vc_itf_t const *vc = (tusb_desc_vc_itf_t const *)desc; - return ((uint8_t const*) desc) + vc->std.bLength + tu_le16toh(vc->ctl.wTotalLength); + uint8_t const *end = (uint8_t const*)desc + vc->std.bLength + + tu_le16toh(vc->ctl.wTotalLength); + if (vc->std.bNumEndpoints) { + end += sizeof(tusb_desc_endpoint_t); // standard EP descriptor + end += 5; // class-specific EP descriptor (fixed 5 bytes per UVC spec) + } + return end; } /** Find the first entity descriptor with the entity ID @@ -740,6 +753,9 @@ static bool _close_vc_itf(uint8_t rhport, videod_interface_t *self) /* The end of the video control interface descriptor. */ void const *end = _end_of_control_descriptor(vc); if (vc->std.bNumEndpoints != 0) { + /* Extend end to cover the standard endpoint and class-specific endpoint descriptors + * that follow wTotalLength */ + end = (uint8_t const*)end + sizeof(tusb_desc_endpoint_t) + sizeof(tusb_desc_cs_video_vc_ep_t); /* Find the notification endpoint descriptor. */ cur = _find_desc(cur, end, TUSB_DESC_ENDPOINT); TU_ASSERT(cur < end); @@ -780,6 +796,9 @@ static bool _open_vc_itf(uint8_t rhport, videod_interface_t *self, uint_fast8_t if (vc->std.bNumEndpoints != 0) { /* Support for 1 endpoint only. */ TU_VERIFY(1 == vc->std.bNumEndpoints); + /* Extend end to cover the standard endpoint and class-specific endpoint descriptors + * that follow wTotalLength */ + end = (uint8_t const*)end + sizeof(tusb_desc_endpoint_t) + sizeof(tusb_desc_cs_video_vc_ep_t); /* Find the notification endpoint descriptor. */ cur = _find_desc(cur, end, TUSB_DESC_ENDPOINT); TU_VERIFY(cur < end); |