1 /*
2 * Copyright (c) Texas Instruments Incorporated 2018
3 *
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31 */
33 /**
34 * \file fvid2.h
35 *
36 * \brief FVID2 API
37 *
38 * FVID2 API is an interface which is used to create, control and use different
39 * video drivers. FVID2 API is used not only for on-chip
40 * peripherals drivers like capture, display but also for external off-chip
41 * video device peripherals like video decoders, video encoders and
42 * video sensors.
43 *
44 * All video drivers and external video peripherals implement the FVID2
45 * API.
46 * Many drivers also extend the FVID2 interface by defining their own driver
47 * specific IOCTLs.
48 *
49 * <b> All FVID2 API must be called from task context </b>. Some examples
50 * in the package maybe calling FVID2 APIs from callback and/or
51 * interrupt context. Such examples will be modified in subsequent releases
52 * and in order that user application do not have to do special migration it
53 * is strongly recommended to use FVID2 APIs only from task context.
54 *
55 * A FVID2 API can be of two kinds,
56 *
57 * - <b> Blocking API </b> <br>
58 * Here the FVID2 API call returns only after completing the request or
59 * functionality or if timed out or if some other error occurs.
60 * The below APIs are always blocking, unless specified otherwise by
61 * specific driver.
62 * - Fvid2_create()
63 * - Fvid2_delete()
64 * - Fvid2_start()
65 * - Fvid2_stop()
66 * - Fvid2_control()
67 * - Fvid2_setFormat()
68 * - Fvid2_getFormat()
69 *
70 * - <b> Non-blocking API </b> <br>
71 * Here FVID2 API call queues the request to the driver and returns
72 * immediately before the request is processed or completed.
73 * Application should use the completion callback to wait for request
74 * completion.
75 * The below APIs are always non-blocking, unless specified otherwise by
76 * specific driver.
77 * - Fvid2_queue()
78 * - Fvid2_dequeue()
79 * - Fvid2_processFrames()
80 * - Fvid2_getProcessedFrames()
81 *
82 * A FVID2 Driver can belong to one the below categories. The FVID2 APIs
83 * applicable to driver in a category are also listed below. The below is
84 * true for most driver unless specified otherwise by a specific driver.
85 * - <b> Streaming interface drivers </b> <br>
86 * Examples include, capture, display, graphics.
87 * Below FVID2 APIs are implemented by such drivers.
88 * - Fvid2_create()
89 * - Fvid2_delete()
90 * - Fvid2_start()
91 * - Fvid2_stop()
92 * - Fvid2_queue()
93 * - Fvid2_dequeue()
94 * - Fvid2_control()
95 * - Fvid2_setFormat() - OPTIONAL
96 * - Fvid2_getFormat() - OPTIONAL
97 *
98 * - <b> Memory to memory processing interface drivers </b> <br>
99 * Examples include, M2M VPE.
100 * Below FVID2 APIs are implemented by such drivers.
101 * - Fvid2_create()
102 * - Fvid2_delete()
103 * - Fvid2_processFrames()
104 * - Fvid2_getProcessedFrames()
105 * - Fvid2_control()
106 * - Fvid2_setFormat() - OPTIONAL
107 * - Fvid2_getFormat() - OPTIONAL
108 *
109 * - <b> Control interface drivers </b> <br>
110 * Examples include, display controller, external video devices.
111 * Below FVID2 APIs are implemented by such drivers.
112 * - Fvid2_create()
113 * - Fvid2_delete()
114 * - Fvid2_control()
115 * - Fvid2_start()
116 * - Fvid2_stop()
117 * - Fvid2_setFormat() - OPTIONAL
118 * - Fvid2_getFormat() - OPTIONAL
119 *
120 * Before making any FVID2 API calls, Fvid2_init() must be called.
121 * Fvid2_deInit() must be called during system shutdown.
122 *
123 * Fvid2_getVersionString() and Fvid2_getVersionNumber() can be used to get
124 * information about current driver version number.
125 *
126 * All FVID2 drivers are of type Fvid2_Handle, which gets created when
127 * Fvid2_create() is called. This handle is used for all subsequent FVID2
128 * API calls. This handle and its associated resources are free'ed when
129 * Fvid2_delete() is called.
130 *
131 * All FVID2 APIs make use of Fvid2_Frame, Fvid2_FrameList and/or
132 * Fvid2_ProcessList for exchanging and processing video frames via a driver.
133 * Further all drivers use a common user callback mechanism via Fvid2_CbParams
134 * to indicate to the user that a frame is ready. Many drivers, but not all,
135 * use the Fvid2_Format data structure to describe video input, output data
136 * formats.
137 *
138 * All drivers use the constants, enum's, error codes defined in this file to
139 * control and configure a driver.
140 *
141 * In addition, most drivers define driver specific create time parameters
142 * and IOCTLs to allow the user to control and configure the driver in driver
143 * specific ways. Further a driver may define driver specific run-time
144 * parameters which are passed by user to the driver via
145 * Fvid2_Frame.perFrameCfg and/or Fvid2_FrameList.perListCfg.
146 *
147 * Also user application can associate user specific app data with a
148 * driver handle via Fvid2_CbParams.appData or with every frame via
149 * FIVD2_Frame.appData. The app data set as part of Fvid2_CbParams returned
150 * back to user when callback occurs. The app data set as part of Fvid2_Frame
151 * is returned back to the user when the Fvid2_Frame itself is returned back to
152 * user via Fvid2_dequeue() or Fvid2_getProcessedFrames(). The driver will not
153 * modify this app data. This could be used by the application to store any
154 * application specific data like application object info and so on.
155 *
156 */
158 /*
159 * \version 0.1 Created.
160 * 0.2 Changes for BIOS 6 and new FVID2 interface.
161 * 0.2.1 Merged color and data format enums to data format enums.
162 * Added process list structure to support M2M
163 * (memory to memory) drivers.
164 * Removed FVID2_Buf structure and directly used address array
165 * in Fvid2_Frame structure.
166 * Defined proper signature for FVID2 APIs.
167 * 0.2.2 Added proper comments.
168 * 0.3 Added subframe callback and added reserved fields in all the
169 * structures.
170 * 0.4 Made frames pointer to pointer to array of frame pointer in
171 * framelist to simplify application allocation and ease of
172 * use.
173 * 0.5 Added FVID2 standard enums.
174 * 0.6 Split into two files. fvid2.h will contain only FVID2 driver
175 * specific defintions/declarations. It will include
176 * fvid2_dataTypes.h for data type defintions
177 * 1.0 Removed reserved fields as this is not used anywhere and
178 * changed Ptr to void*, changed types to stdint.h types.
179 *
180 */
182 #ifndef FVID2_H_
183 #define FVID2_H_
185 /* ========================================================================== */
186 /* Include Files */
187 /* ========================================================================== */
189 #include <ti/csl/csl_fvid2_dataTypes.h>
190 #include <ti/drv/fvid2/include/trace.h>
191 #include <ti/drv/fvid2/include/fvid2_utils.h>
193 #ifdef __cplusplus
194 extern "C" {
195 #endif
197 /* ========================================================================== */
198 /* Macros & Typedefs */
199 /* ========================================================================== */
201 /**
202 * \brief FVID2 driver version string.
203 * Version is of the form mm_nn_xx_yy where,
204 * mm - Product version (02 for FVID2). This increments for any new FVID2
205 * versions.
206 * nn - Major number - Increments if any backward compatibility is broken
207 * or major change within a product version.
208 * xx - Minor number - Increments for any minor change or any additions
209 * done without breaking backward compatibility.
210 * yy - Build number - Increments for every release.
211 */
212 #define FVID2_VERSION_STRING "FVID_02_02_00_00"
214 /** \brief FVID2 driver version number. */
215 #define FVID2_VERSION_NUMBER (0x02020000U)
217 /** \brief FVID2 Driver handle. */
218 typedef void *Fvid2_Handle;
220 /**
221 * \brief FVID2 driver callback function prototype.
222 *
223 * This callback is used by the drivers which implement non-blocking
224 * FVID2 APIs.
225 *
226 * User should assume that callbacks happen in ISR context and hence should
227 * apply rules relevant to ISR context when implementing callback functions,
228 * i.e blocking APIs should not be called from callback. Users should also
229 * assume that interrupts are enabled when in callback context, i.e other
230 * interrupt / callbacks can occur when a callback is under execution.
231 * User callback implementation should not be very long, since callback
232 * execution may block other drivers from executing. Typically it is
233 * recommended to set a semaphore or flag when callback happens and do the
234 * more involved callback handling in task context.
235 *
236 * This callback is typically called by the driver as mentioned below,
237 * unless specified otherwise by specific drivers.
238 *
239 * In case of display drivers, this callback function will be called
240 * when a frame(s) is/are completed displayed. Then the application can
241 * dequeue the displayed buffer back from the driver.
242 *
243 * In case of capture drivers, this callback function will be called
244 * when a frame(s) is/are captured. Then the application can dequeue the
245 * captured buffer back from the driver.
246 *
247 * In case of M2M drivers, this callback function will be called
248 * when a request from the application is completed by the driver. Then the
249 * application can dequeue the completed request buffers back from the driver.
250 *
251 * In case of control drivers, callbacks are typically not used since mostly
252 * FVID2 APIs implemented by control drivers are of blocking nature.
253 *
254 * \param handle [OUT] FVID2 handle for which the callback has occurred.
255 * \param appData [OUT] Application data provided to the driver at the
256 * time of Fvid2_create().
257 *
258 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
259 */
260 typedef int32_t (*Fvid2_CbFxn)(Fvid2_Handle handle, void *appData);
262 /**
263 * \brief FVID2 error callback function prototype.
264 *
265 * Error callback is called by driver when it encounters a error during
266 * processing of frames in its internal queue.
267 *
268 * When user submits frames to the driver it does minimal error checks and
269 * stores the the frames in its internal queues. In case of any error at
270 * this point the FVID2 API will simply return error and error callback
271 * will not be called.
272 *
273 * The driver will later (depending on how its request queue is full) process
274 * these frames submitted by the user. If driver finds any error in either
275 * the input frame information or hardware itself then it will call this error
276 * callback to notify the user about this error. As part of the callback
277 * information it also returns the frames or request for which error happened
278 * so that user can take appropriate action.
279 *
280 * Users should apply same rules as that of Fvid2_CbFxn when implementing
281 * error callbacks.
282 *
283 * \param handle [OUT] FVID2 handle for which the callback has occurred.
284 * \param appData [OUT] Application data provided to the driver at the time
285 * of Fvid2_create().
286 * \param errList [OUT] Pointer to a valid framelist (Fvid2_FrameList)
287 * in case of capture and display drivers or a pointer
288 * to a valid processlist (Fvid2_ProcessList) in case of
289 * M2M drivers. The driver copies the aborted/error
290 * frames in this frame list or process list.
291 *
292 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
293 */
294 typedef int32_t (*Fvid2_ErrCbFxn)(Fvid2_Handle handle,
295 void *appData,
296 void *errList);
298 /**
299 * \brief FVID2 callback that is called by subframe mode Capture driver.
300 *
301 * This callback is called for every subframe of frame that
302 * is captured. This function is used by Capture Driver and not meant for M2M
303 * drivers.
304 *
305 * Users should apply same rules as that of Fvid2_CbFxn when implementing
306 * subframe callbacks.
307 *
308 * \param handle [OUT] FVID2 handle for which this callback happened.
309 * \param subFrameInfo [OUT] SubFrame information.
310 *
311 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
312 */
313 typedef int32_t (*Fvid2_SubFrameCbFxn)(Fvid2_Handle handle,
314 Fvid2_Frame *subFrame);
316 /**
317 * \name FVID2 Max limits
318 * @{
319 */
321 /** \brief Decide the streamid based on channel number. */
322 #define FVID2_STREAM_ID_ANY (0xFFFFFFFFU)
324 /* @} */
326 /*
327 * =========== Command codes for Submit call =============
328 */
329 /** \brief Control command base address. */
330 #define FVID2_CTRL_BASE (0x00000000U)
331 /** \brief User command base address. */
332 #define FVID2_USER_BASE (0x10000000U)
334 /**
335 * \addtogroup BSP_DRV_IOCTL_FVID2
336 * @{
337 */
339 /**
340 * \brief Control command used by Fvid2_setFormat()
341 *
342 * \param cmdArgs [IN] const Fvid2_Format *
343 * \param cmdStatusArgs [OUT] NULL
344 *
345 * \return FVID2_SOK on success, else failure.
346 */
347 #define FVID2_SET_FORMAT ((uint32_t) FVID2_CTRL_BASE + 3U)
349 /**
350 * \brief Control command used by Fvid2_getFormat()
351 *
352 * \param cmdArgs [IN] Fvid2_Format *
353 * \param cmdStatusArgs [OUT] NULL
354 *
355 * \return FVID2_SOK on success, else failure.
356 */
357 #define FVID2_GET_FORMAT ((uint32_t) FVID2_CTRL_BASE + 4U)
359 /**
360 * \brief Control command used by Fvid2_start()
361 *
362 * \param cmdArgs [IN] Driver specific
363 * \param cmdStatusArgs [OUT] NULL
364 *
365 * \return FVID2_SOK on success, else failure.
366 */
367 #define FVID2_START ((uint32_t) FVID2_CTRL_BASE + 5U)
369 /**
370 * \brief Control command used by Fvid2_stop()
371 *
372 * \param cmdArgs [IN] Driver specific
373 * \param cmdStatusArgs [OUT] NULL
374 *
375 * \return FVID2_SOK on success, else failure.
376 */
377 #define FVID2_STOP ((uint32_t) FVID2_CTRL_BASE + 6U)
379 /* @} */
381 /* ========================================================================== */
382 /* Structure Declarations */
383 /* ========================================================================== */
385 /**
386 * \brief FVID2 callback parameters that are setup during Fvid2_create().
387 */
388 typedef struct
389 {
390 Fvid2_CbFxn cbFxn;
391 /**< Application callback function used by the driver to intimate any
392 * operation has completed or not. This is an optional parameter
393 * in case application decides to use polling method and so could be
394 * set to NULL. */
396 Fvid2_ErrCbFxn errCbFxn;
397 /**< Application error callback function used by the driver to intimate
398 * any error occurs at the time of streaming. This is an optional
399 * parameter in case application decides not to get any error callback
400 * and so could be set to NULL. */
402 void *errList;
403 /**< Pointer to a valid Fvid2_FrameList in case of capture
404 * and display drivers or a pointer to a valid Fvid2_ProcessList
405 * in case of M2M drivers where the driver copies
406 * the aborted/error packet. The memory of this list should be
407 * allocated by the application and provided to the driver at the time
408 * of driver creation. When the application gets this callback, it has
409 * to empty this list and taken necessary action like freeing up memories
410 * etc. The driver will then reuse the same list for future error
411 * callback.
412 * This could be NULL if errCbFxn is NULL. Otherwise this should be
413 * non-NULL. */
415 void *appData;
416 /**< Application specific data which is returned in the callback function
417 * as it is. This could be set to NULL if not used. */
418 } Fvid2_CbParams;
420 /* ========================================================================== */
421 /* Function Declarations */
422 /* ========================================================================== */
424 /**
425 * \brief FVID2 init function.
426 *
427 * Initializes the FVID2 layer.
428 * This function should be called before calling any of FVID2 API's and
429 * should be called only once.
430 *
431 * \param args [IN] Not used currently. Set to NULL.
432 *
433 * \return FVID2_SOK on success else appropriate FVID2 error code on failure.
434 */
435 int32_t Fvid2_init(void *args);
437 /**
438 * \brief FVID2 deinit function.
439 *
440 * Uninitializes the FVID2 layer and should be called during system shutdown.
441 * Should not be called if Fvid2_init() is not called.
442 *
443 * \param args [IN] Not used currently. Set to NULL.
444 *
445 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
446 */
447 int32_t Fvid2_deInit(void *args);
449 /**
450 * \brief Get the version string for FVID2 interface.
451 *
452 * This is the version number for the FVID2 interface. This
453 * function can be called prior to #Fvid2_init() to get the version number.
454 *
455 * \return Pointer to FVID2 version string.
456 */
457 const char *Fvid2_getVersionString(void);
459 /**
460 * \brief Same as #Fvid2_getVersionString() except it returns the version in
461 * uint32_t form.
462 *
463 * Example, v1.0.1.17 will be 0x01000117
464 *
465 * \return FVID2 version number.
466 */
467 uint32_t Fvid2_getVersionNumber(void);
469 /**
470 * \brief Creates the driver identified by the driver ID.
471 *
472 * This will allocate HW and/or SW resources and return a Fvid2_Handle
473 * for this driver. This handle will be used for subsequent FVID2 API calls
474 *
475 * \param drvId [IN] Driver to open. Driver ID is driver specific.
476 *
477 * \param instanceId [IN] Instance of the driver to open and is used
478 * to differentiate multiple instance support on a
479 * single driver. Instance ID is driver specific.
480 *
481 * \param createArgs [IN] Pointer to the create argument structure. The type
482 * of the structure is defined by the specific driver.
483 * This parameter could be NULL depending on whether the
484 * actual driver forces it or not.
485 *
486 * \param createStatusArgs [OUT] Pointer to status argument structure where the
487 * driver returns any status information. The type
488 * of the structure is defined by the specific driver.
489 * This parameter could be NULL depending on whether the
490 * actual driver forces it or not.
491 *
492 * \param cbParams [IN] Application callback parameters.
493 * This parameter could be NULL depending on whether the
494 * actual driver forces it or not.
495 *
496 * \return non-NULL Fvid2_Handle object pointer on success else returns NULL
497 * on error.
498 */
499 Fvid2_Handle Fvid2_create(uint32_t drvId,
500 uint32_t instanceId,
501 void *createArgs,
502 void *createStatusArgs,
503 const Fvid2_CbParams *cbParams);
505 /**
506 * \brief Deletes a previously created FVID2 driver handle.
507 *
508 * This free's the HW/SW resources allocated during create
509 *
510 * \param handle [IN] FVID2 handle returned by create call.
511 *
512 * \param deleteArgs [IN] Pointer to the delete argument structure. The type
513 * of the structure is defined by the specific driver.
514 * This parameter could be NULL depending on whether the
515 * actual driver forces it or not.
516 *
517 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
518 */
519 int32_t Fvid2_delete(Fvid2_Handle handle, void *deleteArgs);
521 /**
522 * \brief Send control commands (IOCTLs) to the driver.
523 *
524 * \param handle [IN] FVID2 handle returned by create call.
525 *
526 * \param cmd [IN] IOCTL command. The type of command supported
527 * is defined by the specific driver.
528 *
529 * \param cmdArgs [IN] Pointer to the command argument structure. The type
530 * of the structure is defined by the specific driver
531 * for each of the supported IOCTL.
532 * This parameter could be NULL depending on whether the
533 * actual driver forces it or not.
534 *
535 * \param cmdStatusArgs [OUT] Pointer to status argument structure where the
536 * driver returns any status information. The type
537 * of the structure is defined by the specific driver
538 * for each of the supported IOCTL.
539 * This parameter could be NULL depending on whether the
540 * actual driver forces it or not.
541 *
542 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
543 */
544 int32_t Fvid2_control(Fvid2_Handle handle,
545 uint32_t cmd,
546 void *cmdArgs,
547 void *cmdStatusArgs);
549 /**
550 * \brief An application calls Fvid2_queue to submit a video buffer to the
551 * video device driver.
552 *
553 * - This is used in capture/display drivers.
554 * - This function could be called from task or ISR context unless the specific
555 * driver restricts from doing so.
556 * - This is a non-blocking API unless the specific driver restricts from
557 * doing so.
558 *
559 * \param handle [IN] FVID2 handle returned by create call.
560 * \param frameList [IN] Pointer to the frame list structure containing the
561 * information about the FVID2 frames that has to be
562 * queued in the driver.
563 * \param streamId [IN] Stream ID to which the frames should be queued
564 * This is used in drivers where they could support
565 * multiple streams for the same handle. Otherwise this
566 * should be set to zero.
567 *
568 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
569 */
570 int32_t Fvid2_queue(Fvid2_Handle handle,
571 Fvid2_FrameList *frameList,
572 uint32_t streamId);
574 /**
575 * \brief An application calls Fvid2_dequeue to request the video device
576 * driver to give ownership of a video buffer.
577 *
578 * - This is used in capture/display drivers.
579 * - This is a non-blocking API if timeout is FVID2_TIMEOUT_NONE and could be
580 * called by task and ISR context unless the specific driver restricts from
581 * doing so.
582 * - This is blocking API if timeout is FVID2_TIMEOUT_FOREVER if supported by
583 * specific driver implementation.
584 *
585 * \param handle [IN] FVID2 handle returned by create call.
586 * \param frameList [OUT] Pointer to the frame list structure where the
587 * dequeued frame pointer will be stored.
588 * \param streamId [IN] Stream ID from where frames should be dequeued.
589 * This is used in drivers where it could support multiple
590 * streams for the same handle. Otherwise this
591 * should be set to zero.
592 * \param timeout [IN] FVID2 timeout in units of OS ticks. This will
593 * determine the timeout value till the driver will block
594 * for a free or completed buffer is available.
595 * For non-blocking drivers this parameter might be
596 * ignored.
597 *
598 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
599 */
600 int32_t Fvid2_dequeue(Fvid2_Handle handle,
601 Fvid2_FrameList *frameList,
602 uint32_t streamId,
603 uint32_t timeout);
605 /**
606 * \brief An application calls Fvid2_processRequest to submit a video buffer
607 * to the video device driver.
608 *
609 * This API is used for submitting a single channel video processing request
610 * to the video device driver. It uses framelist to submit multiple
611 * frames of different stream ids of the same request.
612 *
613 * - This function could be called from task or ISR context unless the specific
614 * driver restricts from doing so.
615 * - This is a non-blocking API unless the specific driver restricts from
616 * doing so.
617 *
618 * \param handle [IN] FVID2 handle returned by create call.
619 * \param inFrameList [IN] Pointer to the array of input frames with
620 * different stream ids.
621 * \param outFrameList [IN] Pointer to the array of output frames with
622 * different stream ids
623 *
624 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
625 */
626 int32_t Fvid2_processRequest(Fvid2_Handle handle,
627 Fvid2_FrameList *inFrameList,
628 Fvid2_FrameList *outFrameList);
630 /**
631 * \brief An application calls Fvid2_getProcessedRequest to get the
632 * processed request back from the driver and thus to get the
633 * ownership of request back from the driver.
634 *
635 * - This is a non-blocking API if timeout is FVID2_TIMEOUT_NONE and could be
636 * called by task and ISR context unless the specific driver restricts from
637 * doing so.
638 * - This is blocking API if timeout is FVID2_TIMEOUT_FOREVER if supported by
639 * specific driver implementation.
640 *
641 * \param handle [IN] FVID2 handle returned by create call.
642 * \param inFrameList [OUT] Pointer to frame list in which input frames with
643 * different stream ids will be returned
644 * by the driver.
645 * \param outFrameList [OUT] Pointer to frame list in which output frames with
646 * different stream ids will be returned by
647 * the driver.
648 * \param timeout [IN] FVID2 timeout. This will determine the timeout
649 * value till the driver will block for a
650 * free or completed buffer is available.
651 * For non-blocking drivers this parameter
652 * might be ignored.
653 *
654 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
655 */
656 int32_t Fvid2_getProcessedRequest(Fvid2_Handle handle,
657 Fvid2_FrameList *inFrameList,
658 Fvid2_FrameList *outFrameList,
659 uint32_t timeout);
660 /**
661 * \brief An application calls Fvid2_start to request the video device
662 * driver to start the video display or capture operation.
663 * This function should be called from task context only and should not be
664 * called from ISR context.
665 *
666 * \param handle [IN] FVID2 handle returned by create call.
667 * \param cmdArgs [IN] Pointer to the start argument structure. The type
668 * of the structure is defined by the specific driver.
669 * This parameter could be NULL depending on whether the
670 * actual driver forces it or not.
671 *
672 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
673 */
674 static inline int32_t Fvid2_start(Fvid2_Handle handle, void *cmdArgs);
676 /**
677 * \brief An application calls Fvid2_stop to request the video device
678 * driver to stop the video display or capture operation.
679 * This function should be called from task context only and should not be
680 * called from ISR context.
681 *
682 * \param handle [IN] FVID2 handle returned by create call.
683 * \param cmdArgs [IN] Pointer to the stop argument structure. The type
684 * of the structure is defined by the specific driver.
685 * This parameter could be NULL depending on whether the
686 * actual driver forces it or not.
687 *
688 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
689 */
690 static inline int32_t Fvid2_stop(Fvid2_Handle handle, void *cmdArgs);
692 /**
693 * \brief An application calls Fvid2_setFormat to request the video device
694 * driver to set the format for a given channel.
695 * This function should be called from task context only and should not be
696 * called from ISR context.
697 *
698 * \param handle [IN] FVID2 handle returned by create call.
699 * \param fmt [IN] Pointer to the FVID2 format structure.
700 *
701 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
702 */
703 static inline int32_t Fvid2_setFormat(Fvid2_Handle handle, Fvid2_Format *fmt);
705 /**
706 * \brief An application calls Fvid2_getFormat to request the video device
707 * driver to get the current format for a given channel.
708 * This function should be called from task context only and should not be
709 * called from ISR context.
710 *
711 * \param handle [IN] FVID2 handle returned by create call.
712 * \param fmt [OUT] Pointer to the FVID2 format structure.
713 *
714 * \return FVID2_SOK on success, else appropriate FVID2 error code on failure.
715 */
716 static inline int32_t Fvid2_getFormat(Fvid2_Handle handle, Fvid2_Format *fmt);
718 /**
719 * \brief Fvid2_CbParams structure init function.
720 *
721 * \param cbPrms [IN] Pointer to #Fvid2_CbParams structure.
722 *
723 */
724 static inline void Fvid2CbParams_init(Fvid2_CbParams *cbPrms);
726 /* ========================================================================== */
727 /* Static Function Definitions */
728 /* ========================================================================== */
730 static inline int32_t Fvid2_start(Fvid2_Handle handle, void *cmdArgs)
731 {
732 return Fvid2_control(handle, FVID2_START, cmdArgs, NULL);
733 }
735 static inline int32_t Fvid2_stop(Fvid2_Handle handle, void *cmdArgs)
736 {
737 return Fvid2_control(handle, FVID2_STOP, cmdArgs, NULL);
738 }
740 static inline int32_t Fvid2_setFormat(Fvid2_Handle handle, Fvid2_Format *fmt)
741 {
742 return Fvid2_control(handle, FVID2_SET_FORMAT, fmt, NULL);
743 }
745 static inline int32_t Fvid2_getFormat(Fvid2_Handle handle, Fvid2_Format *fmt)
746 {
747 return Fvid2_control(handle, FVID2_GET_FORMAT, fmt, NULL);
748 }
750 static inline void Fvid2CbParams_init(Fvid2_CbParams *cbPrms)
751 {
752 if (NULL != cbPrms)
753 {
754 cbPrms->cbFxn = NULL;
755 cbPrms->errCbFxn = NULL;
756 cbPrms->errList = NULL;
757 cbPrms->appData = NULL;
758 }
760 return;
761 }
763 #ifdef __cplusplus
764 }
765 #endif
767 #endif /* #ifndef FVID2_H_ */
769 /* @} */