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V4L/DVB (5205): Usbvision: dynamic allocation for frames 

- fix decoder route output
- dynamic frame buffer allocation

Signed-off-by: Thierry MERLE <thierry.merle@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Thierry MERLE 2007-02-07 10:13:11 -03:00 committed by Mauro Carvalho Chehab
parent c65eeaab1f
commit 6f78e186fe
3 changed files with 60 additions and 35 deletions
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35
drivers/media/video/usbvision/usbvision-core.c
View File

@ -1852,28 +1852,33 @@ int usbvision_set_output(struct usb_usbvision *usbvision, int width,
/*
* usbvision_frames_alloc
* allocate the maximum frames this driver can manage
* allocate the required frames
*/
int usbvision_frames_alloc(struct usb_usbvision *usbvision)
int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
{
int i;
/* Allocate memory for the frame buffers */
usbvision->max_frame_size = MAX_FRAME_SIZE;
usbvision->fbuf_size = USBVISION_NUMFRAMES * usbvision->max_frame_size;
usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size);
/*needs to be page aligned cause the buffers can be mapped individually! */
usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth *
usbvision->curheight *
usbvision->palette.bytes_per_pixel);
if(usbvision->fbuf == NULL) {
err("%s: unable to allocate %d bytes for fbuf ",
__FUNCTION__, usbvision->fbuf_size);
return -ENOMEM;
/* Try to do my best to allocate the frames the user want in the remaining memory */
usbvision->num_frames = number_of_frames;
while (usbvision->num_frames > 0) {
usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) {
break;
}
usbvision->num_frames--;
}
spin_lock_init(&usbvision->queue_lock);
init_waitqueue_head(&usbvision->wait_frame);
init_waitqueue_head(&usbvision->wait_stream);
/* Allocate all buffers */
for (i = 0; i < USBVISION_NUMFRAMES; i++) {
for (i = 0; i < usbvision->num_frames; i++) {
usbvision->frame[i].index = i;
usbvision->frame[i].grabstate = FrameState_Unused;
usbvision->frame[i].data = usbvision->fbuf +
@ -1887,7 +1892,8 @@ int usbvision_frames_alloc(struct usb_usbvision *usbvision)
usbvision->frame[i].height = usbvision->curheight;
usbvision->frame[i].bytes_read = 0;
}
return 0;
PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size);
return usbvision->num_frames;
}
/*
@ -1897,9 +1903,13 @@ int usbvision_frames_alloc(struct usb_usbvision *usbvision)
void usbvision_frames_free(struct usb_usbvision *usbvision)
{
/* Have to free all that memory */
PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames);
if (usbvision->fbuf != NULL) {
usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
usbvision->fbuf = NULL;
usbvision->num_frames = 0;
}
}
/*
@ -2490,6 +2500,7 @@ int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
usbvision->ctl_input = channel;
route.input = SAA7115_COMPOSITE1;
route.output = 0;
call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
call_i2c_clients(usbvision, VIDIOC_S_INPUT, &usbvision->ctl_input);

57
drivers/media/video/usbvision/usbvision-video.c
View File

@ -391,19 +391,14 @@ static int usbvision_v4l2_open(struct inode *inode, struct file *file)
if (usbvision->user)
errCode = -EBUSY;
else {
/* Allocate memory for the frame buffers */
errCode = usbvision_frames_alloc(usbvision);
if(!errCode) {
/* Allocate memory for the scratch ring buffer */
errCode = usbvision_scratch_alloc(usbvision);
if ((!errCode) && (isocMode==ISOC_MODE_COMPRESS)) {
/* Allocate intermediate decompression buffers only if needed */
errCode = usbvision_decompress_alloc(usbvision);
}
/* Allocate memory for the scratch ring buffer */
errCode = usbvision_scratch_alloc(usbvision);
if (isocMode==ISOC_MODE_COMPRESS) {
/* Allocate intermediate decompression buffers only if needed */
errCode = usbvision_decompress_alloc(usbvision);
}
if (errCode) {
/* Deallocate all buffers if trouble */
usbvision_frames_free(usbvision);
usbvision_scratch_free(usbvision);
usbvision_decompress_free(usbvision);
}
@ -476,6 +471,7 @@ static int usbvision_v4l2_close(struct inode *inode, struct file *file)
usbvision_decompress_free(usbvision);
usbvision_frames_free(usbvision);
usbvision_empty_framequeues(usbvision);
usbvision_scratch_free(usbvision);
usbvision->user--;
@ -809,7 +805,9 @@ static int usbvision_v4l2_do_ioctl(struct inode *inode, struct file *file,
return ret;
}
usbvision_frames_free(usbvision);
usbvision_empty_framequeues(usbvision);
vr->count = usbvision_frames_alloc(usbvision,vr->count);
usbvision->curFrame = NULL;
@ -826,7 +824,7 @@ static int usbvision_v4l2_do_ioctl(struct inode *inode, struct file *file,
if(vb->type != V4L2_CAP_VIDEO_CAPTURE) {
return -EINVAL;
}
if(vb->index>=USBVISION_NUMFRAMES) {
if(vb->index>=usbvision->num_frames) {
return -EINVAL;
}
// Updating the corresponding frame state
@ -840,7 +838,7 @@ static int usbvision_v4l2_do_ioctl(struct inode *inode, struct file *file,
vb->flags |= V4L2_BUF_FLAG_MAPPED;
vb->memory = V4L2_MEMORY_MMAP;
vb->m.offset = vb->index*usbvision->max_frame_size;
vb->m.offset = vb->index*PAGE_ALIGN(usbvision->max_frame_size);
vb->memory = V4L2_MEMORY_MMAP;
vb->field = V4L2_FIELD_NONE;
@ -859,7 +857,7 @@ static int usbvision_v4l2_do_ioctl(struct inode *inode, struct file *file,
if(vb->type != V4L2_CAP_VIDEO_CAPTURE) {
return -EINVAL;
}
if(vb->index>=USBVISION_NUMFRAMES) {
if(vb->index>=usbvision->num_frames) {
return -EINVAL;
}
@ -1029,6 +1027,7 @@ static int usbvision_v4l2_do_ioctl(struct inode *inode, struct file *file,
if ((ret = usbvision_stream_interrupt(usbvision)))
return ret;
}
usbvision_frames_free(usbvision);
usbvision_empty_framequeues(usbvision);
usbvision->curFrame = NULL;
@ -1075,12 +1074,24 @@ static ssize_t usbvision_v4l2_read(struct file *file, char __user *buf,
if (!USBVISION_IS_OPERATIONAL(usbvision) || (buf == NULL))
return -EFAULT;
/* no stream is running, make it running ! */
usbvision->streaming = Stream_On;
call_i2c_clients(usbvision,VIDIOC_STREAMON , NULL);
/* This entry point is compatible with the mmap routines so that a user can do either
VIDIOC_QBUF/VIDIOC_DQBUF to get frames or call read on the device. */
if(!usbvision->num_frames) {
/* First, allocate some frames to work with if this has not been done with
VIDIOC_REQBUF */
usbvision_frames_free(usbvision);
usbvision_empty_framequeues(usbvision);
usbvision_frames_alloc(usbvision,USBVISION_NUMFRAMES);
}
/* First, enqueue as many frames as possible (like a user of VIDIOC_QBUF would do) */
for(i=0;i<USBVISION_NUMFRAMES;i++) {
if(usbvision->streaming != Stream_On) {
/* no stream is running, make it running ! */
usbvision->streaming = Stream_On;
call_i2c_clients(usbvision,VIDIOC_STREAMON , NULL);
}
/* Then, enqueue as many frames as possible (like a user of VIDIOC_QBUF would do) */
for(i=0;i<usbvision->num_frames;i++) {
frame = &usbvision->frame[i];
if(frame->grabstate == FrameState_Unused) {
/* Mark it as ready and enqueue frame */
@ -1157,6 +1168,8 @@ static int usbvision_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
struct video_device *dev = video_devdata(file);
struct usb_usbvision *usbvision = (struct usb_usbvision *) video_get_drvdata(dev);
PDEBUG(DBG_MMAP, "mmap");
down(&usbvision->lock);
if (!USBVISION_IS_OPERATIONAL(usbvision)) {
@ -1165,16 +1178,16 @@ static int usbvision_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
}
if (!(vma->vm_flags & VM_WRITE) ||
size != PAGE_ALIGN(usbvision->curwidth*usbvision->curheight*usbvision->palette.bytes_per_pixel)) {
size != PAGE_ALIGN(usbvision->max_frame_size)) {
up(&usbvision->lock);
return -EINVAL;
}
for (i = 0; i < USBVISION_NUMFRAMES; i++) {
if (((usbvision->max_frame_size*i) >> PAGE_SHIFT) == vma->vm_pgoff)
for (i = 0; i < usbvision->num_frames; i++) {
if (((PAGE_ALIGN(usbvision->max_frame_size)*i) >> PAGE_SHIFT) == vma->vm_pgoff)
break;
}
if (i == USBVISION_NUMFRAMES) {
if (i == usbvision->num_frames) {
PDEBUG(DBG_MMAP, "mmap: user supplied mapping address is out of range");
up(&usbvision->lock);
return -EINVAL;

3
drivers/media/video/usbvision/usbvision.h
View File

@ -421,6 +421,7 @@ struct usb_usbvision {
wait_queue_head_t wait_stream; /* Processes waiting */
struct usbvision_frame *curFrame; // pointer to current frame, set by usbvision_find_header
struct usbvision_frame frame[USBVISION_NUMFRAMES]; // frame buffer
int num_frames; // number of frames allocated
struct usbvision_sbuf sbuf[USBVISION_NUMSBUF]; // S buffering
volatile int remove_pending; /* If set then about to exit */
@ -490,7 +491,7 @@ int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg);
int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
unsigned char value);
int usbvision_frames_alloc(struct usb_usbvision *usbvision);
int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames);
void usbvision_frames_free(struct usb_usbvision *usbvision);
int usbvision_scratch_alloc(struct usb_usbvision *usbvision);
void usbvision_scratch_free(struct usb_usbvision *usbvision);