diff options
Diffstat (limited to 'circuitpython/lib/tinyusb/src/class/video/video_device.c')
| -rw-r--r-- | circuitpython/lib/tinyusb/src/class/video/video_device.c | 1149 |
1 files changed, 1149 insertions, 0 deletions
diff --git a/circuitpython/lib/tinyusb/src/class/video/video_device.c b/circuitpython/lib/tinyusb/src/class/video/video_device.c new file mode 100644 index 0000000..91718f2 --- /dev/null +++ b/circuitpython/lib/tinyusb/src/class/video/video_device.c @@ -0,0 +1,1149 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2021 Koji KITAYAMA + * Copyright (c) 2019 Ha Thach (tinyusb.org) + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * This file is part of the TinyUSB stack. + */ + +#include "tusb_option.h" + +#if (CFG_TUD_ENABLED && CFG_TUD_VIDEO && CFG_TUD_VIDEO_STREAMING) + +#include "device/usbd.h" +#include "device/usbd_pvt.h" + +#include "video_device.h" + +//--------------------------------------------------------------------+ +// MACRO CONSTANT TYPEDEF +//--------------------------------------------------------------------+ +typedef struct { + tusb_desc_interface_t std; + tusb_desc_cs_video_ctl_itf_hdr_t ctl; +} tusb_desc_vc_itf_t; + +typedef struct { + tusb_desc_interface_t std; + tusb_desc_cs_video_stm_itf_hdr_t stm; +} tusb_desc_vs_itf_t; + +typedef union { + tusb_desc_cs_video_ctl_itf_hdr_t ctl; + tusb_desc_cs_video_stm_itf_hdr_t stm; +} tusb_desc_video_itf_hdr_t; + +typedef struct TU_ATTR_PACKED { + uint8_t bLength; + uint8_t bDescriptorType; + uint8_t bDescriptorSubtype; + uint8_t bEntityId; +} tusb_desc_cs_video_entity_itf_t; + +/* video streaming interface */ +typedef struct TU_ATTR_PACKED { + uint8_t index_vc; /* index of bound video control interface */ + uint8_t index_vs; /* index from the video control interface */ + struct { + uint16_t beg; /* Offset of the begging of video streaming interface descriptor */ + uint16_t end; /* Offset of the end of video streaming interface descriptor */ + uint16_t cur; /* Offset of the current settings */ + uint16_t ep[2]; /* Offset of endpoint descriptors. 0: streaming, 1: still capture */ + } desc; + uint8_t *buffer; /* frame buffer. assume linear buffer. no support for stride access */ + uint32_t bufsize; /* frame buffer size */ + uint32_t offset; /* offset for the next payload transfer */ + uint32_t max_payload_transfer_size; + uint8_t error_code;/* error code */ + /*------------- From this point, data is not cleared by bus reset -------------*/ + CFG_TUSB_MEM_ALIGN uint8_t ep_buf[CFG_TUD_VIDEO_STREAMING_EP_BUFSIZE]; /* EP transfer buffer for streaming */ +} videod_streaming_interface_t; + +/* video control interface */ +typedef struct TU_ATTR_PACKED { + void const *beg; /* The head of the first video control interface descriptor */ + uint16_t len; /* Byte length of the descriptors */ + uint16_t cur; /* offset for current video control interface */ + uint8_t stm[CFG_TUD_VIDEO_STREAMING]; /* Indices of streaming interface */ + uint8_t error_code; /* error code */ + uint8_t power_mode; + + /*------------- From this point, data is not cleared by bus reset -------------*/ + // CFG_TUSB_MEM_ALIGN uint8_t ctl_buf[64]; /* EP transfer buffer for interrupt transfer */ + +} videod_interface_t; + +#define ITF_STM_MEM_RESET_SIZE offsetof(videod_streaming_interface_t, ep_buf) + +//--------------------------------------------------------------------+ +// INTERNAL OBJECT & FUNCTION DECLARATION +//--------------------------------------------------------------------+ +CFG_TUSB_MEM_SECTION static videod_interface_t _videod_itf[CFG_TUD_VIDEO]; +CFG_TUSB_MEM_SECTION static videod_streaming_interface_t _videod_streaming_itf[CFG_TUD_VIDEO_STREAMING]; + +static uint8_t const _cap_get = 0x1u; /* support for GET */ +static uint8_t const _cap_get_set = 0x3u; /* support for GET and SET */ + +/** Get interface number from the interface descriptor + * + * @param[in] desc interface descriptor + * + * @return bInterfaceNumber */ +static inline uint8_t _desc_itfnum(void const *desc) +{ + return ((uint8_t const*)desc)[2]; +} + +/** Get endpoint address from the endpoint descriptor + * + * @param[in] desc endpoint descriptor + * + * @return bEndpointAddress */ +static inline uint8_t _desc_ep_addr(void const *desc) +{ + return ((uint8_t const*)desc)[2]; +} + +/** Get instance of streaming interface + * + * @param[in] ctl_idx instance number of video control + * @param[in] stm_idx index number of streaming interface + * + * @return instance */ +static videod_streaming_interface_t* _get_instance_streaming(uint_fast8_t ctl_idx, uint_fast8_t stm_idx) +{ + videod_interface_t *ctl = &_videod_itf[ctl_idx]; + if (!ctl->beg) return NULL; + videod_streaming_interface_t *stm = &_videod_streaming_itf[ctl->stm[stm_idx]]; + if (!stm->desc.beg) return NULL; + return stm; +} + +static tusb_desc_vc_itf_t const* _get_desc_vc(videod_interface_t const *self) +{ + return (tusb_desc_vc_itf_t const *)(self->beg + self->cur); +} + +static tusb_desc_vs_itf_t const* _get_desc_vs(videod_streaming_interface_t const *self) +{ + if (!self->desc.cur) return NULL; + void const *desc = _videod_itf[self->index_vc].beg; + return (tusb_desc_vs_itf_t const*)(desc + self->desc.cur); +} + +/** Find the first descriptor of a given type + * + * @param[in] beg The head of descriptor byte array. + * @param[in] end The tail of descriptor byte array. + * @param[in] desc_type The target descriptor type. + * + * @return The pointer for interface descriptor. + * @retval end did not found interface descriptor */ +static void const* _find_desc(void const *beg, void const *end, uint_fast8_t desc_type) +{ + void const *cur = beg; + while ((cur < end) && (desc_type != tu_desc_type(cur))) { + cur = tu_desc_next(cur); + } + return cur; +} + +/** Find the first descriptor specified by the arguments + * + * @param[in] beg The head of descriptor byte array. + * @param[in] end The tail of descriptor byte array. + * @param[in] desc_type The target descriptor type + * @param[in] element_0 The target element following the desc_type + * @param[in] element_1 The target element following the element_0 + * + * @return The pointer for interface descriptor. + * @retval end did not found interface descriptor */ +static void const* _find_desc_3(void const *beg, void const *end, + uint_fast8_t desc_type, + uint_fast8_t element_0, + uint_fast8_t element_1) +{ + for (void const *cur = beg; cur < end; cur = _find_desc(cur, end, desc_type)) { + uint8_t const *p = (uint8_t const *)cur; + if ((p[2] == element_0) && (p[3] == element_1)) { + return cur; + } + cur = tu_desc_next(cur); + } + return end; +} + +/** Return the next interface descriptor which has another interface number. + * + * @param[in] beg The head of descriptor byte array. + * @param[in] end The tail of descriptor byte array. + * + * @return The pointer for interface descriptor. + * @retval end did not found interface descriptor */ +static void const* _next_desc_itf(void const *beg, void const *end) +{ + void const *cur = beg; + uint_fast8_t itfnum = ((tusb_desc_interface_t const*)cur)->bInterfaceNumber; + while ((cur < end) && + (itfnum == ((tusb_desc_interface_t const*)cur)->bInterfaceNumber)) { + cur = _find_desc(tu_desc_next(cur), end, TUSB_DESC_INTERFACE); + } + return cur; +} + +/** Find the first interface descriptor with the specified interface number and alternate setting number. + * + * @param[in] beg The head of descriptor byte array. + * @param[in] end The tail of descriptor byte array. + * @param[in] itfnum The target interface number. + * @param[in] altnum The target alternate setting number. + * + * @return The pointer for interface descriptor. + * @retval end did not found interface descriptor */ +static inline void const* _find_desc_itf(void const *beg, void const *end, uint_fast8_t itfnum, uint_fast8_t altnum) +{ + return _find_desc_3(beg, end, TUSB_DESC_INTERFACE, itfnum, altnum); +} + +/** Find the first endpoint descriptor belonging to the current interface descriptor. + * + * The search range is from `beg` to `end` or the next interface descriptor. + * + * @param[in] beg The head of descriptor byte array. + * @param[in] end The tail of descriptor byte array. + * + * @return The pointer for endpoint descriptor. + * @retval end did not found endpoint descriptor */ +static void const* _find_desc_ep(void const *beg, void const *end) +{ + for (void const *cur = beg; cur < end; cur = tu_desc_next(cur)) { + uint_fast8_t desc_type = tu_desc_type(cur); + if (TUSB_DESC_ENDPOINT == desc_type) return cur; + if (TUSB_DESC_INTERFACE == desc_type) break; + } + return end; +} + +/** Find the first entity descriptor with the entity ID + * specified by the argument belonging to the current video control descriptor. + * + * @param[in] desc The video control interface descriptor. + * @param[in] entityid The target entity id. + * + * @return The pointer for interface descriptor. + * @retval end did not found interface descriptor */ +static void const* _find_desc_entity(void const *desc, uint_fast8_t entityid) +{ + tusb_desc_vc_itf_t const *vc = (tusb_desc_vc_itf_t const*)desc; + void const *beg = vc; + void const *end = beg + vc->std.bLength + vc->ctl.wTotalLength; + for (void const *cur = beg; cur < end; cur = _find_desc(cur, end, TUSB_DESC_CS_INTERFACE)) { + tusb_desc_cs_video_entity_itf_t const *itf = (tusb_desc_cs_video_entity_itf_t const *)cur; + if ((VIDEO_CS_ITF_VC_INPUT_TERMINAL <= itf->bDescriptorSubtype + && itf->bDescriptorSubtype < VIDEO_CS_ITF_VC_MAX) + && itf->bEntityId == entityid) { + return itf; + } + cur = tu_desc_next(cur); + } + return end; +} + +/** Return the end of the video streaming descriptor. */ +static inline void const* _end_of_streaming_descriptor(void const *desc) +{ + tusb_desc_vs_itf_t const *vs = (tusb_desc_vs_itf_t const *)desc; + return desc + vs->std.bLength + vs->stm.wTotalLength; +} + +/** Find the first format descriptor with the specified format number. */ +static inline tusb_desc_cs_video_fmt_uncompressed_t const *_find_desc_format(void const *beg, void const *end, uint_fast8_t fmtnum) +{ + return (tusb_desc_cs_video_fmt_uncompressed_t const*) + _find_desc_3(beg, end, TUSB_DESC_CS_INTERFACE, VIDEO_CS_ITF_VS_FORMAT_UNCOMPRESSED, fmtnum); +} + +/** Find the first frame descriptor with the specified format number. */ +static inline tusb_desc_cs_video_frm_uncompressed_t const *_find_desc_frame(void const *beg, void const *end, uint_fast8_t frmnum) +{ + return (tusb_desc_cs_video_frm_uncompressed_t const*) + _find_desc_3(beg, end, TUSB_DESC_CS_INTERFACE, VIDEO_CS_ITF_VS_FRAME_UNCOMPRESSED, frmnum); +} + +/** Set uniquely determined values to variables that have not been set + * + * @param[in,out] param Target */ +static bool _update_streaming_parameters(videod_streaming_interface_t const *stm, + video_probe_and_commit_control_t *param) +{ + tusb_desc_vs_itf_t const *vs = _get_desc_vs(stm); + uint_fast8_t fmtnum = param->bFormatIndex; + TU_ASSERT(fmtnum <= vs->stm.bNumFormats); + if (!fmtnum) { + if (1 < vs->stm.bNumFormats) return true; /* Need to negotiate all variables. */ + fmtnum = 1; + param->bFormatIndex = 1; + } + + /* Set the parameters determined by the format */ + param->wKeyFrameRate = 1; + param->wPFrameRate = 0; + param->wCompQuality = 1; /* 1 to 10000 */ + param->wCompWindowSize = 1; /* GOP size? */ + param->wDelay = 0; /* milliseconds */ + param->dwClockFrequency = 27000000; /* same as MPEG-2 system time clock */ + param->bmFramingInfo = 0x3; /* enables FrameID and EndOfFrame */ + param->bPreferedVersion = 1; + param->bMinVersion = 1; + param->bMaxVersion = 1; + param->bUsage = 0; + param->bBitDepthLuma = 8; + + void const *end = _end_of_streaming_descriptor(vs); + tusb_desc_cs_video_fmt_uncompressed_t const *fmt = _find_desc_format(tu_desc_next(vs), end, fmtnum); + TU_ASSERT(fmt != end); + uint_fast8_t frmnum = param->bFrameIndex; + TU_ASSERT(frmnum <= fmt->bNumFrameDescriptors); + if (!frmnum) { + if (1 < fmt->bNumFrameDescriptors) return true; + frmnum = 1; + param->bFrameIndex = 1; + } + tusb_desc_cs_video_frm_uncompressed_t const *frm = _find_desc_frame(tu_desc_next(fmt), end, frmnum); + TU_ASSERT(frm != end); + + /* Set the parameters determined by the frame */ + uint_fast32_t frame_size = param->dwMaxVideoFrameSize; + if (!frame_size) { + frame_size = (uint_fast32_t)frm->wWidth * frm->wHeight * fmt->bBitsPerPixel / 8; + param->dwMaxVideoFrameSize = frame_size; + } + + uint_fast32_t interval = param->dwFrameInterval; + if (!interval) { + if ((1 < frm->bFrameIntervalType) || + ((0 == frm->bFrameIntervalType) && (frm->dwFrameInterval[1] != frm->dwFrameInterval[0]))) { + return true; + } + interval = frm->dwFrameInterval[0]; + param->dwFrameInterval = interval; + } + uint_fast32_t interval_ms = interval / 10000; + TU_ASSERT(interval_ms); + uint_fast32_t payload_size = (frame_size + interval_ms - 1) / interval_ms + 2; + param->dwMaxPayloadTransferSize = payload_size; + return true; +} + +/** Set the minimum, maximum, default values or resolutions to variables which need to negotiate with the host + * + * @param[in] request GET_MAX, GET_MIN, GET_RES or GET_DEF + * @param[in,out] param Target + */ +static bool _negotiate_streaming_parameters(videod_streaming_interface_t const *stm, uint_fast8_t request, + video_probe_and_commit_control_t *param) +{ + uint_fast8_t const fmtnum = param->bFormatIndex; + if (!fmtnum) { + switch (request) { + case VIDEO_REQUEST_GET_MAX: + param->bFormatIndex = _get_desc_vs(stm)->stm.bNumFormats; + break; + case VIDEO_REQUEST_GET_MIN: + case VIDEO_REQUEST_GET_DEF: + param->bFormatIndex = 1; + break; + default: return false; + } + /* Set the parameters determined by the format */ + param->wKeyFrameRate = 1; + param->wPFrameRate = 0; + param->wCompQuality = 1; /* 1 to 10000 */ + param->wCompWindowSize = 1; /* GOP size? */ + param->wDelay = 0; /* milliseconds */ + param->dwClockFrequency = 27000000; /* same as MPEG-2 system time clock */ + param->bmFramingInfo = 0x3; /* enables FrameID and EndOfFrame */ + param->bPreferedVersion = 1; + param->bMinVersion = 1; + param->bMaxVersion = 1; + param->bUsage = 0; + param->bBitDepthLuma = 8; + return true; + } + + uint_fast8_t frmnum = param->bFrameIndex; + if (!frmnum) { + tusb_desc_vs_itf_t const *vs = _get_desc_vs(stm); + void const *end = _end_of_streaming_descriptor(vs); + tusb_desc_cs_video_fmt_uncompressed_t const *fmt = _find_desc_format(tu_desc_next(vs), end, fmtnum); + switch (request) { + case VIDEO_REQUEST_GET_MAX: + frmnum = fmt->bNumFrameDescriptors; + break; + case VIDEO_REQUEST_GET_MIN: + frmnum = 1; + break; + case VIDEO_REQUEST_GET_DEF: + frmnum = fmt->bDefaultFrameIndex; + break; + default: return false; + } + param->bFrameIndex = frmnum; + /* Set the parameters determined by the frame */ + tusb_desc_cs_video_frm_uncompressed_t const *frm = _find_desc_frame(tu_desc_next(fmt), end, frmnum); + param->dwMaxVideoFrameSize = frm->wWidth * frm->wHeight * fmt->bBitsPerPixel / 8; + return true; + } + + if (!param->dwFrameInterval) { + tusb_desc_vs_itf_t const *vs = _get_desc_vs(stm); + void const *end = _end_of_streaming_descriptor(vs); + tusb_desc_cs_video_fmt_uncompressed_t const *fmt = _find_desc_format(tu_desc_next(vs), end, fmtnum); + tusb_desc_cs_video_frm_uncompressed_t const *frm = _find_desc_frame(tu_desc_next(fmt), end, frmnum); + + uint_fast32_t interval, interval_ms; + switch (request) { + case VIDEO_REQUEST_GET_MAX: + { + uint_fast32_t min_interval, max_interval; + uint_fast8_t num_intervals = frm->bFrameIntervalType; + max_interval = num_intervals ? frm->dwFrameInterval[num_intervals - 1]: frm->dwFrameInterval[1]; + min_interval = frm->dwFrameInterval[0]; + interval = max_interval; + interval_ms = min_interval / 10000; + } + break; + case VIDEO_REQUEST_GET_MIN: + { + uint_fast32_t min_interval, max_interval; + uint_fast8_t num_intervals = frm->bFrameIntervalType; + max_interval = num_intervals ? frm->dwFrameInterval[num_intervals - 1]: frm->dwFrameInterval[1]; + min_interval = frm->dwFrameInterval[0]; + interval = min_interval; + interval_ms = max_interval / 10000; + } + break; + case VIDEO_REQUEST_GET_DEF: + interval = frm->dwDefaultFrameInterval; + interval_ms = interval / 10000; + break; + case VIDEO_REQUEST_GET_RES: + { + uint_fast8_t num_intervals = frm->bFrameIntervalType; + if (num_intervals) { + interval = 0; + } else { + interval = frm->dwFrameInterval[2]; + interval_ms = interval / 10000; + } + } + break; + default: return false; + } + param->dwFrameInterval = interval; + if (!interval) { + param->dwMaxPayloadTransferSize = 0; + } else { + uint_fast32_t frame_size = param->dwMaxVideoFrameSize; + if (!interval_ms) { + param->dwMaxPayloadTransferSize = frame_size + 2; + } else { + param->dwMaxPayloadTransferSize = (frame_size + interval_ms - 1) / interval_ms + 2; + } + } + return true; + } + return true; +} + +/** Close current video control interface. + * + * @param[in,out] self Video control interface context. + * @param[in] altnum The target alternate setting number. */ +static bool _close_vc_itf(uint8_t rhport, videod_interface_t *self) +{ + tusb_desc_vc_itf_t const *vc = _get_desc_vc(self); + /* The next descriptor after the class-specific VC interface header descriptor. */ + void const *cur = (void const*)vc + vc->std.bLength + vc->ctl.bLength; + /* The end of the video control interface descriptor. */ + void const *end = (void const*)vc + vc->std.bLength + vc->ctl.wTotalLength; + if (vc->std.bNumEndpoints) { + /* Find the notification endpoint descriptor. */ + cur = _find_desc(cur, end, TUSB_DESC_ENDPOINT); + TU_ASSERT(cur < end); + tusb_desc_endpoint_t const *notif = (tusb_desc_endpoint_t const *)cur; + usbd_edpt_close(rhport, notif->bEndpointAddress); + } + self->cur = 0; + return true; +} + +/** Set the alternate setting to own video control interface. + * + * @param[in,out] self Video control interface context. + * @param[in] altnum The target alternate setting number. */ +static bool _open_vc_itf(uint8_t rhport, videod_interface_t *self, uint_fast8_t altnum) +{ + TU_LOG2(" open VC %d\n", altnum); + void const *beg = self->beg; + void const *end = beg + self->len; + /* The first descriptor is a video control interface descriptor. */ + void const *cur = _find_desc_itf(beg, end, _desc_itfnum(beg), altnum); + TU_LOG2(" cur %d\n", cur - beg); + TU_VERIFY(cur < end); + + tusb_desc_vc_itf_t const *vc = (tusb_desc_vc_itf_t const *)cur; + TU_LOG2(" bInCollection %d\n", vc->ctl.bInCollection); + /* Support for up to 2 streaming interfaces only. */ + TU_ASSERT(vc->ctl.bInCollection <= CFG_TUD_VIDEO_STREAMING); + + /* Update to point the end of the video control interface descriptor. */ + end = cur + vc->std.bLength + vc->ctl.wTotalLength; + /* Advance to the next descriptor after the class-specific VC interface header descriptor. */ + cur += vc->std.bLength + vc->ctl.bLength; + TU_LOG2(" bNumEndpoints %d\n", vc->std.bNumEndpoints); + /* Open the notification endpoint if it exist. */ + if (vc->std.bNumEndpoints) { + /* Support for 1 endpoint only. */ + TU_VERIFY(1 == vc->std.bNumEndpoints); + /* Find the notification endpoint descriptor. */ + cur = _find_desc(cur, end, TUSB_DESC_ENDPOINT); + TU_VERIFY(cur < end); + tusb_desc_endpoint_t const *notif = (tusb_desc_endpoint_t const *)cur; + /* Open the notification endpoint */ + TU_ASSERT(usbd_edpt_open(rhport, notif)); + } + self->cur = (void const*)vc - beg; + return true; +} + +/** Set the alternate setting to own video streaming interface. + * + * @param[in,out] stm Streaming interface context. + * @param[in] altnum The target alternate setting number. */ +static bool _open_vs_itf(uint8_t rhport, videod_streaming_interface_t *stm, uint_fast8_t altnum) +{ + uint_fast8_t i; + TU_LOG2(" reopen VS %d\n", altnum); + void const *desc = _videod_itf[stm->index_vc].beg; + + /* Close endpoints of previous settings. */ + for (i = 0; i < TU_ARRAY_SIZE(stm->desc.ep); ++i) { + uint_fast16_t ofs_ep = stm->desc.ep[i]; + if (!ofs_ep) break; + uint_fast8_t ep_adr = _desc_ep_addr(desc + ofs_ep); + usbd_edpt_close(rhport, ep_adr); + stm->desc.ep[i] = 0; + TU_LOG2(" close EP%02x\n", ep_adr); + } + /* clear transfer management information */ + stm->buffer = NULL; + stm->bufsize = 0; + stm->offset = 0; + + /* Find a alternate interface */ + void const *beg = desc + stm->desc.beg; + void const *end = desc + stm->desc.end; + void const *cur = _find_desc_itf(beg, end, _desc_itfnum(beg), altnum); + TU_VERIFY(cur < end); + uint_fast8_t numeps = ((tusb_desc_interface_t const *)cur)->bNumEndpoints; + TU_ASSERT(numeps <= TU_ARRAY_SIZE(stm->desc.ep)); + stm->desc.cur = cur - desc; /* Save the offset of the new settings */ + if (!altnum) { + /* initialize streaming settings */ + stm->max_payload_transfer_size = 0; + video_probe_and_commit_control_t *param = + (video_probe_and_commit_control_t *)&stm->ep_buf; + tu_memclr(param, sizeof(*param)); + return _update_streaming_parameters(stm, param); + } + /* Open endpoints of the new settings. */ + for (i = 0, cur = tu_desc_next(cur); i < numeps; ++i, cur = tu_desc_next(cur)) { + cur = _find_desc_ep(cur, end); + TU_ASSERT(cur < end); + tusb_desc_endpoint_t const *ep = (tusb_desc_endpoint_t const*)cur; + if (!stm->max_payload_transfer_size) { + video_probe_and_commit_control_t const *param = (video_probe_and_commit_control_t const*)&stm->ep_buf; + uint_fast32_t max_size = param->dwMaxPayloadTransferSize; + if ((TUSB_XFER_ISOCHRONOUS == ep->bmAttributes.xfer) && + (tu_edpt_packet_size(ep) < max_size)) + { + /* FS must be less than or equal to max packet size */ + return false; + } + /* Set the negotiated value */ + stm->max_payload_transfer_size = max_size; + } + TU_ASSERT(usbd_edpt_open(rhport, ep)); + stm->desc.ep[i] = cur - desc; + TU_LOG2(" open EP%02x\n", _desc_ep_addr(cur)); + } + /* initialize payload header */ + tusb_video_payload_header_t *hdr = (tusb_video_payload_header_t*)stm->ep_buf; + hdr->bHeaderLength = sizeof(*hdr); + hdr->bmHeaderInfo = 0; + + return true; +} + +/** Prepare the next packet payload. */ +static uint_fast16_t _prepare_in_payload(videod_streaming_interface_t *stm) +{ + uint_fast16_t remaining = stm->bufsize - stm->offset; + uint_fast16_t hdr_len = stm->ep_buf[0]; + uint_fast16_t pkt_len = stm->max_payload_transfer_size; + if (hdr_len + remaining < pkt_len) { + pkt_len = hdr_len + remaining; + } + uint_fast16_t data_len = pkt_len - hdr_len; + memcpy(&stm->ep_buf[hdr_len], stm->buffer + stm->offset, data_len); + stm->offset += data_len; + remaining -= data_len; + if (!remaining) { + tusb_video_payload_header_t *hdr = (tusb_video_payload_header_t*)stm->ep_buf; + hdr->EndOfFrame = 1; + } + return hdr_len + data_len; +} + +/** Handle a standard request to the video control interface. */ +static int handle_video_ctl_std_req(uint8_t rhport, uint8_t stage, + tusb_control_request_t const *request, + uint_fast8_t ctl_idx) +{ + switch (request->bRequest) { + case TUSB_REQ_GET_INTERFACE: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(1 == request->wLength, VIDEO_ERROR_UNKNOWN); + tusb_desc_vc_itf_t const *vc = _get_desc_vc(&_videod_itf[ctl_idx]); + TU_VERIFY(vc, VIDEO_ERROR_UNKNOWN); + + uint8_t alt_num = vc->std.bAlternateSetting; + + TU_VERIFY(tud_control_xfer(rhport, request, &alt_num, sizeof(alt_num)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + case TUSB_REQ_SET_INTERFACE: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(0 == request->wLength, VIDEO_ERROR_UNKNOWN); + TU_VERIFY(_close_vc_itf(rhport, &_videod_itf[ctl_idx]), VIDEO_ERROR_UNKNOWN); + TU_VERIFY(_open_vc_itf(rhport, &_videod_itf[ctl_idx], request->wValue), VIDEO_ERROR_UNKNOWN); + tud_control_status(rhport, request); + } + return VIDEO_ERROR_NONE; + + default: /* Unknown/Unsupported request */ + TU_BREAKPOINT(); + return VIDEO_ERROR_INVALID_REQUEST; + } +} + +static int handle_video_ctl_cs_req(uint8_t rhport, uint8_t stage, + tusb_control_request_t const *request, + uint_fast8_t ctl_idx) +{ + videod_interface_t *self = &_videod_itf[ctl_idx]; + + /* 4.2.1 Interface Control Request */ + switch (TU_U16_HIGH(request->wValue)) { + case VIDEO_VC_CTL_VIDEO_POWER_MODE: + switch (request->bRequest) { + case VIDEO_REQUEST_SET_CUR: + if (stage == CONTROL_STAGE_SETUP) { + TU_VERIFY(1 == request->wLength, VIDEO_ERROR_UNKNOWN); + TU_VERIFY(tud_control_xfer(rhport, request, &self->power_mode, sizeof(self->power_mode)), VIDEO_ERROR_UNKNOWN); + } else if (stage == CONTROL_STAGE_ACK) { + if (tud_video_power_mode_cb) return tud_video_power_mode_cb(ctl_idx, self->power_mode); + } + return VIDEO_ERROR_NONE; + + case VIDEO_REQUEST_GET_CUR: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(1 == request->wLength, VIDEO_ERROR_UNKNOWN); + TU_VERIFY(tud_control_xfer(rhport, request, &self->power_mode, sizeof(self->power_mode)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + case VIDEO_REQUEST_GET_INFO: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(1 == request->wLength, VIDEO_ERROR_UNKNOWN); + TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)(uintptr_t) &_cap_get_set, sizeof(_cap_get_set)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + default: break; + } + break; + + case VIDEO_VC_CTL_REQUEST_ERROR_CODE: + switch (request->bRequest) { + case VIDEO_REQUEST_GET_CUR: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(tud_control_xfer(rhport, request, &self->error_code, sizeof(uint8_t)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + case VIDEO_REQUEST_GET_INFO: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)(uintptr_t) &_cap_get, sizeof(_cap_get)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + default: break; + } + break; + + default: break; + } + + /* Unknown/Unsupported request */ + TU_BREAKPOINT(); + return VIDEO_ERROR_INVALID_REQUEST; +} + +static int handle_video_ctl_req(uint8_t rhport, uint8_t stage, + tusb_control_request_t const *request, + uint_fast8_t ctl_idx) +{ + uint_fast8_t entity_id; + switch (request->bmRequestType_bit.type) { + case TUSB_REQ_TYPE_STANDARD: + return handle_video_ctl_std_req(rhport, stage, request, ctl_idx); + + case TUSB_REQ_TYPE_CLASS: + entity_id = TU_U16_HIGH(request->wIndex); + if (!entity_id) { + return handle_video_ctl_cs_req(rhport, stage, request, ctl_idx); + } else { + TU_VERIFY(_find_desc_entity(_get_desc_vc(&_videod_itf[ctl_idx]), entity_id), VIDEO_ERROR_INVALID_REQUEST); + return VIDEO_ERROR_NONE; + } + + default: + return VIDEO_ERROR_INVALID_REQUEST; + } +} + +static int handle_video_stm_std_req(uint8_t rhport, uint8_t stage, + tusb_control_request_t const *request, + uint_fast8_t stm_idx) +{ + videod_streaming_interface_t *self = &_videod_streaming_itf[stm_idx]; + switch (request->bRequest) { + case TUSB_REQ_GET_INTERFACE: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(1 == request->wLength, VIDEO_ERROR_UNKNOWN); + tusb_desc_vs_itf_t const *vs = _get_desc_vs(self); + TU_VERIFY(vs, VIDEO_ERROR_UNKNOWN); + uint8_t alt_num = vs->std.bAlternateSetting; + + TU_VERIFY(tud_control_xfer(rhport, request, &alt_num, sizeof(alt_num)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + case TUSB_REQ_SET_INTERFACE: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(_open_vs_itf(rhport, self, request->wValue), VIDEO_ERROR_UNKNOWN); + tud_control_status(rhport, request); + } + return VIDEO_ERROR_NONE; + + default: /* Unknown/Unsupported request */ + TU_BREAKPOINT(); + return VIDEO_ERROR_INVALID_REQUEST; + } +} + +static int handle_video_stm_cs_req(uint8_t rhport, uint8_t stage, + tusb_control_request_t const *request, + uint_fast8_t stm_idx) +{ + (void)rhport; + videod_streaming_interface_t *self = &_videod_streaming_itf[stm_idx]; + + /* 4.2.1 Interface Control Request */ + switch (TU_U16_HIGH(request->wValue)) { + case VIDEO_VS_CTL_STREAM_ERROR_CODE: + switch (request->bRequest) { + case VIDEO_REQUEST_GET_CUR: + if (stage == CONTROL_STAGE_SETUP) + { + /* TODO */ + TU_VERIFY(tud_control_xfer(rhport, request, &self->error_code, sizeof(uint8_t)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + case VIDEO_REQUEST_GET_INFO: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)(uintptr_t) &_cap_get, sizeof(_cap_get)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + default: break; + } + break; + + case VIDEO_VS_CTL_PROBE: + switch (request->bRequest) { + case VIDEO_REQUEST_SET_CUR: + if (stage == CONTROL_STAGE_SETUP) { + TU_VERIFY(sizeof(video_probe_and_commit_control_t) == request->wLength, VIDEO_ERROR_UNKNOWN); + TU_VERIFY(tud_control_xfer(rhport, request, self->ep_buf, sizeof(video_probe_and_commit_control_t)), + VIDEO_ERROR_UNKNOWN); + } else if (stage == CONTROL_STAGE_ACK) { + TU_VERIFY(_update_streaming_parameters(self, (video_probe_and_commit_control_t*)self->ep_buf), + VIDEO_ERROR_INVALID_VALUE_WITHIN_RANGE); + } + return VIDEO_ERROR_NONE; + + case VIDEO_REQUEST_GET_CUR: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(request->wLength, VIDEO_ERROR_UNKNOWN); + TU_VERIFY(tud_control_xfer(rhport, request, self->ep_buf, sizeof(video_probe_and_commit_control_t)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + case VIDEO_REQUEST_GET_MIN: + case VIDEO_REQUEST_GET_MAX: + case VIDEO_REQUEST_GET_RES: + case VIDEO_REQUEST_GET_DEF: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(request->wLength, VIDEO_ERROR_UNKNOWN); + video_probe_and_commit_control_t tmp; + tmp = *(video_probe_and_commit_control_t*)&self->ep_buf; + TU_VERIFY(_negotiate_streaming_parameters(self, request->bRequest, &tmp), VIDEO_ERROR_INVALID_VALUE_WITHIN_RANGE); + TU_VERIFY(tud_control_xfer(rhport, request, self->ep_buf, sizeof(video_probe_and_commit_control_t)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + case VIDEO_REQUEST_GET_LEN: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(2 == request->wLength, VIDEO_ERROR_UNKNOWN); + uint16_t len = sizeof(video_probe_and_commit_control_t); + TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)&len, sizeof(len)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + case VIDEO_REQUEST_GET_INFO: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(1 == request->wLength, VIDEO_ERROR_UNKNOWN); + TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)(uintptr_t) &_cap_get_set, sizeof(_cap_get_set)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + default: break; + } + break; + + case VIDEO_VS_CTL_COMMIT: + switch (request->bRequest) { + case VIDEO_REQUEST_SET_CUR: + if (stage == CONTROL_STAGE_SETUP) { + TU_VERIFY(sizeof(video_probe_and_commit_control_t) == request->wLength, VIDEO_ERROR_UNKNOWN); + TU_VERIFY(tud_control_xfer(rhport, request, self->ep_buf, sizeof(video_probe_and_commit_control_t)), VIDEO_ERROR_UNKNOWN); + } else if (stage == CONTROL_STAGE_ACK) { + TU_VERIFY(_update_streaming_parameters(self, (video_probe_and_commit_control_t*)self->ep_buf), VIDEO_ERROR_INVALID_VALUE_WITHIN_RANGE); + if (tud_video_commit_cb) { + return tud_video_commit_cb(self->index_vc, self->index_vs, (video_probe_and_commit_control_t*)self->ep_buf); + } + } + return VIDEO_ERROR_NONE; + + case VIDEO_REQUEST_GET_CUR: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(request->wLength, VIDEO_ERROR_UNKNOWN); + TU_VERIFY(tud_control_xfer(rhport, request, self->ep_buf, sizeof(video_probe_and_commit_control_t)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + case VIDEO_REQUEST_GET_LEN: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(2 == request->wLength, VIDEO_ERROR_UNKNOWN); + uint16_t len = sizeof(video_probe_and_commit_control_t); + TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)&len, sizeof(len)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + case VIDEO_REQUEST_GET_INFO: + if (stage == CONTROL_STAGE_SETUP) + { + TU_VERIFY(1 == request->wLength, VIDEO_ERROR_UNKNOWN); + TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)(uintptr_t) &_cap_get_set, sizeof(_cap_get_set)), VIDEO_ERROR_UNKNOWN); + } + return VIDEO_ERROR_NONE; + + default: break; + } + break; + + case VIDEO_VS_CTL_STILL_PROBE: + case VIDEO_VS_CTL_STILL_COMMIT: + case VIDEO_VS_CTL_STILL_IMAGE_TRIGGER: + case VIDEO_VS_CTL_GENERATE_KEY_FRAME: + case VIDEO_VS_CTL_UPDATE_FRAME_SEGMENT: + case VIDEO_VS_CTL_SYNCH_DELAY_CONTROL: + /* TODO */ + break; + + default: break; + } + + /* Unknown/Unsupported request */ + TU_BREAKPOINT(); + return VIDEO_ERROR_INVALID_REQUEST; +} + +static int handle_video_stm_req(uint8_t rhport, uint8_t stage, + tusb_control_request_t const *request, + uint_fast8_t stm_idx) +{ + switch (request->bmRequestType_bit.type) { + case TUSB_REQ_TYPE_STANDARD: + return handle_video_stm_std_req(rhport, stage, request, stm_idx); + + case TUSB_REQ_TYPE_CLASS: + if (TU_U16_HIGH(request->wIndex)) return VIDEO_ERROR_INVALID_REQUEST; + return handle_video_stm_cs_req(rhport, stage, request, stm_idx); + + default: return VIDEO_ERROR_INVALID_REQUEST; + } + return VIDEO_ERROR_UNKNOWN; +} + +//--------------------------------------------------------------------+ +// APPLICATION API +//--------------------------------------------------------------------+ + +bool tud_video_n_connected(uint_fast8_t ctl_idx) +{ + TU_ASSERT(ctl_idx < CFG_TUD_VIDEO); + videod_streaming_interface_t *stm = _get_instance_streaming(ctl_idx, 0); + if (stm) return true; + return false; +} + +bool tud_video_n_streaming(uint_fast8_t ctl_idx, uint_fast8_t stm_idx) +{ + TU_ASSERT(ctl_idx < CFG_TUD_VIDEO); + TU_ASSERT(stm_idx < CFG_TUD_VIDEO_STREAMING); + videod_streaming_interface_t *stm = _get_instance_streaming(ctl_idx, stm_idx); + if (!stm || !stm->desc.ep[0]) return false; + return true; +} + +bool tud_video_n_frame_xfer(uint_fast8_t ctl_idx, uint_fast8_t stm_idx, void *buffer, size_t bufsize) +{ + TU_ASSERT(ctl_idx < CFG_TUD_VIDEO); + TU_ASSERT(stm_idx < CFG_TUD_VIDEO_STREAMING); + if (!buffer || !bufsize) return false; + videod_streaming_interface_t *stm = _get_instance_streaming(ctl_idx, stm_idx); + if (!stm || !stm->desc.ep[0] || stm->buffer) return false; + + /* Find EP address */ + void const *desc = _videod_itf[stm->index_vc].beg; + uint_fast8_t ep_addr = 0; + for (uint_fast8_t i = 0; i < CFG_TUD_VIDEO_STREAMING; ++i) { + uint_fast16_t ofs_ep = stm->desc.ep[i]; + if (!ofs_ep) continue; + ep_addr = _desc_ep_addr(desc + ofs_ep); + break; + } + if (!ep_addr) return false; + + TU_VERIFY( usbd_edpt_claim(0, ep_addr)); + /* update the packet header */ + tusb_video_payload_header_t *hdr = (tusb_video_payload_header_t*)stm->ep_buf; + hdr->FrameID ^= 1; + hdr->EndOfFrame = 0; + /* update the packet data */ + stm->buffer = (uint8_t*)buffer; + stm->bufsize = bufsize; + uint_fast16_t pkt_len = _prepare_in_payload(stm); + TU_ASSERT( usbd_edpt_xfer(0, ep_addr, stm->ep_buf, pkt_len), 0); + return true; +} + +//--------------------------------------------------------------------+ +// USBD Driver API +//--------------------------------------------------------------------+ +void videod_init(void) +{ + for (uint_fast8_t i = 0; i < CFG_TUD_VIDEO; ++i) { + videod_interface_t* ctl = &_videod_itf[i]; + tu_memclr(ctl, sizeof(*ctl)); + } + for (uint_fast8_t i = 0; i < CFG_TUD_VIDEO_STREAMING; ++i) { + videod_streaming_interface_t *stm = &_videod_streaming_itf[i]; + tu_memclr(stm, ITF_STM_MEM_RESET_SIZE); + } +} + +void videod_reset(uint8_t rhport) +{ + (void) rhport; + for (uint_fast8_t i = 0; i < CFG_TUD_VIDEO; ++i) { + videod_interface_t* ctl = &_videod_itf[i]; + tu_memclr(ctl, sizeof(*ctl)); + } + for (uint_fast8_t i = 0; i < CFG_TUD_VIDEO_STREAMING; ++i) { + videod_streaming_interface_t *stm = &_videod_streaming_itf[i]; + tu_memclr(stm, ITF_STM_MEM_RESET_SIZE); + } +} + +uint16_t videod_open(uint8_t rhport, tusb_desc_interface_t const * itf_desc, uint16_t max_len) +{ + TU_VERIFY((TUSB_CLASS_VIDEO == itf_desc->bInterfaceClass) && + (VIDEO_SUBCLASS_CONTROL == itf_desc->bInterfaceSubClass) && + (VIDEO_ITF_PROTOCOL_15 == itf_desc->bInterfaceProtocol), 0); + + /* Find available interface */ + videod_interface_t *self = NULL; + uint_fast8_t ctl_idx; + for (ctl_idx = 0; ctl_idx < CFG_TUD_VIDEO; ++ctl_idx) { + if (_videod_itf[ctl_idx].beg) continue; + self = &_videod_itf[ctl_idx]; + break; + } + TU_ASSERT(ctl_idx < CFG_TUD_VIDEO, 0); + + void const *end = (void const*)itf_desc + max_len; + self->beg = itf_desc; + self->len = max_len; + /*------------- Video Control Interface -------------*/ + TU_VERIFY(_open_vc_itf(rhport, self, 0), 0); + tusb_desc_vc_itf_t const *vc = _get_desc_vc(self); + uint_fast8_t bInCollection = vc->ctl.bInCollection; + /* Find the end of the video interface descriptor */ + void const *cur = _next_desc_itf(itf_desc, end); + for (uint_fast8_t stm_idx = 0; stm_idx < bInCollection; ++stm_idx) { + videod_streaming_interface_t *stm = NULL; + /* find free streaming interface handle */ + for (uint_fast8_t i = 0; i < CFG_TUD_VIDEO_STREAMING; ++i) { + if (_videod_streaming_itf[i].desc.beg) continue; + stm = &_videod_streaming_itf[i]; + self->stm[stm_idx] = i; + break; + } + TU_ASSERT(stm, 0); + stm->index_vc = ctl_idx; + stm->index_vs = stm_idx; + stm->desc.beg = (uintptr_t)cur - (uintptr_t)itf_desc; + cur = _next_desc_itf(cur, end); + stm->desc.end = (uintptr_t)cur - (uintptr_t)itf_desc; + } + self->len = (uintptr_t)cur - (uintptr_t)itf_desc; + return (uintptr_t)cur - (uintptr_t)itf_desc; +} + +// Invoked when a control transfer occurred on an interface of this class +// Driver response accordingly to the request and the transfer stage (setup/data/ack) +// return false to stall control endpoint (e.g unsupported request) +bool videod_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t const * request) +{ + int err; + TU_VERIFY(request->bmRequestType_bit.recipient == TUSB_REQ_RCPT_INTERFACE); + uint_fast8_t itfnum = tu_u16_low(request->wIndex); + + /* Identify which control interface to use */ + uint_fast8_t itf; + for (itf = 0; itf < CFG_TUD_VIDEO; ++itf) { + void const *desc = _videod_itf[itf].beg; + if (!desc) continue; + if (itfnum == _desc_itfnum(desc)) break; + } + + if (itf < CFG_TUD_VIDEO) { + err = handle_video_ctl_req(rhport, stage, request, itf); + _videod_itf[itf].error_code = (uint8_t)err; + if (err) return false; + return true; + } + + /* Identify which streaming interface to use */ + for (itf = 0; itf < CFG_TUD_VIDEO_STREAMING; ++itf) { + videod_streaming_interface_t *stm = &_videod_streaming_itf[itf]; + if (!stm->desc.beg) continue; + void const *desc = _videod_itf[stm->index_vc].beg; + if (itfnum == _desc_itfnum(desc + stm->desc.beg)) break; + } + + if (itf < CFG_TUD_VIDEO_STREAMING) { + err = handle_video_stm_req(rhport, stage, request, itf); + _videod_streaming_itf[itf].error_code = (uint8_t)err; + if (err) return false; + return true; + } + return false; +} + +bool videod_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_t xferred_bytes) +{ + (void)result; (void)xferred_bytes; + + /* find streaming handle */ + uint_fast8_t itf; + videod_interface_t *ctl; + videod_streaming_interface_t *stm; + for (itf = 0; itf < CFG_TUD_VIDEO_STREAMING; ++itf) { + stm = &_videod_streaming_itf[itf]; + uint_fast16_t const ep_ofs = stm->desc.ep[0]; + if (!ep_ofs) continue; + ctl = &_videod_itf[stm->index_vc]; + void const *desc = ctl->beg; + if (ep_addr == _desc_ep_addr(desc + ep_ofs)) break; + } + + TU_ASSERT(itf < CFG_TUD_VIDEO_STREAMING); + if (stm->offset < stm->bufsize) { + /* Claim the endpoint */ + TU_VERIFY( usbd_edpt_claim(rhport, ep_addr), 0); + uint_fast16_t pkt_len = _prepare_in_payload(stm); + TU_ASSERT( usbd_edpt_xfer(rhport, ep_addr, stm->ep_buf, pkt_len), 0); + } else { + stm->buffer = NULL; + stm->bufsize = 0; + stm->offset = 0; + if (tud_video_frame_xfer_complete_cb) { + tud_video_frame_xfer_complete_cb(stm->index_vc, stm->index_vs); + } + } + return true; +} + +#endif |