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Merged in alinjerpelea/nuttx (pull request #934)
drivers: video: add basic Video Stream support basic video stream and capture implementation based on the spresense SDK code release Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com> Approved-by: Gregory Nutt <gnutt@nuttx.org>
This commit is contained in:
Alin Jerpelea
committed by
Gregory Nutt
Gregory Nutt
parent
d9767b74cd
commit
128c1f1430
@@ -0,0 +1,299 @@
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/****************************************************************************
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* drivers/video/video_framebuff.c
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*
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* Copyright 2018 Sony Semiconductor Solutions Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name of Sony Semiconductor Solutions Corporation nor
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* the names of its contributors may be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include "video_framebuff.h"
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <nuttx/irq.h>
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#include <nuttx/kmalloc.h>
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static void init_buf_chain(video_framebuff_t *fbuf)
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{
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int i;
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vbuf_container_t *tmp;
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fbuf->vbuf_empty = fbuf->vbuf_alloced;
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fbuf->vbuf_next_dma = NULL;
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fbuf->vbuf_dma = NULL;
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fbuf->vbuf_top = NULL;
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fbuf->vbuf_tail = NULL;
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tmp = fbuf->vbuf_alloced;
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for (i = 0; i < fbuf->container_size - 1; i++)
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{
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tmp->next = &tmp[1];
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tmp++;
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}
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}
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static void cleanup_container(video_framebuff_t *fbuf)
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{
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if (fbuf->vbuf_alloced)
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{
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memset(fbuf->vbuf_alloced,
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0,
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sizeof(vbuf_container_t)*fbuf->container_size);
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init_buf_chain(fbuf);
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}
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}
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static inline int is_last_one(video_framebuff_t *fbuf)
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{
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return fbuf->vbuf_top == fbuf->vbuf_tail ? 1 : 0;
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}
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static inline vbuf_container_t *dequeue_vbuf_unsafe(video_framebuff_t *fbuf)
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{
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vbuf_container_t *ret = fbuf->vbuf_top;
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if (is_last_one(fbuf))
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{
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fbuf->vbuf_top = NULL;
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fbuf->vbuf_tail = NULL;
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fbuf->vbuf_next_dma = NULL;
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}
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else
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{
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if (fbuf->mode == V4L2_BUF_MODE_RING)
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{
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fbuf->vbuf_tail->next = fbuf->vbuf_top->next;
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}
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fbuf->vbuf_top = fbuf->vbuf_top->next;
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}
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return ret;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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void video_framebuff_init(video_framebuff_t *fbuf)
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{
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fbuf->mode = V4L2_BUF_MODE_RING;
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fbuf->vbuf_empty = NULL;
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fbuf->vbuf_top = NULL;
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fbuf->vbuf_tail = NULL;
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fbuf->vbuf_next_dma = NULL;
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sem_init(&fbuf->lock_empty, 0, 1);
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}
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void video_framebuff_uninit(video_framebuff_t *fbuf)
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{
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video_framebuff_realloc_container(fbuf, 0);
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sem_destroy(&fbuf->lock_empty);
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}
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int video_framebuff_realloc_container(video_framebuff_t *fbuf, int sz)
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{
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if (sz > V4L2_REQBUFS_COUNT_MAX)
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{
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return -EINVAL;
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}
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if (fbuf->vbuf_alloced == NULL || fbuf->container_size != sz)
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{
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if (fbuf->container_size != sz)
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{
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if (fbuf->vbuf_alloced != NULL)
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{
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kmm_free(fbuf->vbuf_alloced);
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}
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fbuf->vbuf_alloced = NULL;
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fbuf->container_size = 0;
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}
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if (sz > 0)
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{
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fbuf->vbuf_alloced
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= (vbuf_container_t *)kmm_malloc(sizeof(vbuf_container_t)*sz);
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if (fbuf->vbuf_alloced == NULL)
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{
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return -ENOMEM;
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}
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}
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fbuf->container_size = sz;
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}
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cleanup_container(fbuf);
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return OK;
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}
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vbuf_container_t *video_framebuff_get_container(video_framebuff_t *fbuf)
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{
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vbuf_container_t *ret;
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sem_wait(&fbuf->lock_empty);
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ret = fbuf->vbuf_empty;
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if (ret)
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{
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fbuf->vbuf_empty = ret->next;
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ret->next = NULL;
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}
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sem_post(&fbuf->lock_empty);
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return ret;
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}
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void video_framebuff_free_container(video_framebuff_t *fbuf,
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vbuf_container_t *cnt)
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{
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sem_wait(&fbuf->lock_empty);
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cnt->next = fbuf->vbuf_empty;
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fbuf->vbuf_empty = cnt;
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sem_post(&fbuf->lock_empty);
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}
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void video_framebuff_queue_container(video_framebuff_t *fbuf,
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vbuf_container_t *tgt)
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{
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irqstate_t flags;
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flags = enter_critical_section();
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if (fbuf->vbuf_top)
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{
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fbuf->vbuf_tail->next = tgt;
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fbuf->vbuf_tail = tgt;
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if (fbuf->vbuf_next_dma == NULL)
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{
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fbuf->vbuf_next_dma = tgt;
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}
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}
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else
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{
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fbuf->vbuf_top = fbuf->vbuf_tail = tgt;
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fbuf->vbuf_next_dma = tgt;
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}
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if (fbuf->mode == V4L2_BUF_MODE_RING)
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{
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fbuf->vbuf_tail->next = fbuf->vbuf_top;
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}
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else /* Case of V4L2_BUF_MODE_FIFO */
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{
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fbuf->vbuf_tail->next = NULL;
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}
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leave_critical_section(flags);
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}
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vbuf_container_t *video_framebuff_dq_valid_container(video_framebuff_t *fbuf)
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{
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irqstate_t flags;
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vbuf_container_t *ret = NULL;
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flags = enter_critical_section();
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if (fbuf->vbuf_top != NULL && fbuf->vbuf_top != fbuf->vbuf_next_dma)
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{
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ret = dequeue_vbuf_unsafe(fbuf);
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}
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leave_critical_section(flags);
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return ret;
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}
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vbuf_container_t *video_framebuff_get_dma_container(video_framebuff_t *fbuf)
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{
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irqstate_t flags;
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vbuf_container_t *ret;
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flags = enter_critical_section();
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ret = fbuf->vbuf_dma = fbuf->vbuf_next_dma;
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leave_critical_section(flags);
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return ret;
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}
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void video_framebuff_dma_done(video_framebuff_t *fbuf)
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{
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fbuf->vbuf_dma = NULL;
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if (fbuf->vbuf_next_dma)
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{
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fbuf->vbuf_next_dma = fbuf->vbuf_next_dma->next;
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if (fbuf->vbuf_next_dma == fbuf->vbuf_top) /* RING mode case. */
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{
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fbuf->vbuf_top = fbuf->vbuf_top->next;
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fbuf->vbuf_tail = fbuf->vbuf_tail->next;
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}
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}
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}
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void video_framebuff_change_mode(video_framebuff_t *fbuf,
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enum v4l2_buf_mode mode)
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{
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irqstate_t flags;
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flags = enter_critical_section();
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if (fbuf->mode != mode)
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{
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if (fbuf->vbuf_tail)
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{
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if (mode == V4L2_BUF_MODE_RING)
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{
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fbuf->vbuf_tail->next = fbuf->vbuf_top;
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fbuf->vbuf_next_dma = fbuf->vbuf_top;
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}
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else
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{
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fbuf->vbuf_tail->next = NULL;
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fbuf->vbuf_next_dma = fbuf->vbuf_top;
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}
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}
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fbuf->mode = mode;
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}
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leave_critical_section(flags);
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}
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vbuf_container_t *video_framebuff_pop_curr_container(video_framebuff_t *fbuf)
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{
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irqstate_t flags;
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vbuf_container_t *ret = NULL;
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flags = enter_critical_section();
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if (fbuf->vbuf_top != NULL)
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{
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ret = dequeue_vbuf_unsafe(fbuf);
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}
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leave_critical_section(flags);
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return ret;
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}
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