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Add support for the single-planar V4L2 API

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Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
This commit is contained in:
Paul Kocialkowski
2018-09-07 16:43:13 +02:00
parent 25a8ac4d7e
commit 7ff2543e64
12 changed files with 267 additions and 92 deletions
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src/v4l2.c
+127 -30
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@@ -32,6 +32,42 @@
#include "utils.h"
#include "v4l2.h"
static bool v4l2_type_is_output(unsigned int type)
{
switch (type) {
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
return true;
default:
return false;
}
}
static bool v4l2_type_is_mplane(unsigned int type)
{
switch (type) {
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
return true;
default:
return false;
}
}
unsigned int v4l2_type_video_output(bool mplane)
{
return mplane ? V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE :
V4L2_BUF_TYPE_VIDEO_OUTPUT;
}
unsigned int v4l2_type_video_capture(bool mplane)
{
return mplane ? V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE :
V4L2_BUF_TYPE_VIDEO_CAPTURE;
}
int v4l2_query_capabilities(int video_fd, unsigned int *capabilities)
{
struct v4l2_capability capability;
@@ -53,6 +89,30 @@ int v4l2_query_capabilities(int video_fd, unsigned int *capabilities)
return 0;
}
static void v4l2_setup_format(struct v4l2_format *format, unsigned int type,
unsigned int width, unsigned int height,
unsigned int pixelformat)
{
unsigned int sizeimage;
memset(format, 0, sizeof(*format));
format->type = type;
sizeimage = v4l2_type_is_output(type) ? SOURCE_SIZE_MAX : 0;
if (v4l2_type_is_mplane(type)) {
format->fmt.pix_mp.width = width;
format->fmt.pix_mp.height = height;
format->fmt.pix_mp.plane_fmt[0].sizeimage = sizeimage;
format->fmt.pix_mp.pixelformat = pixelformat;
} else {
format->fmt.pix.width = width;
format->fmt.pix.height = height;
format->fmt.pix.sizeimage = sizeimage;
format->fmt.pix.pixelformat = pixelformat;
}
}
bool v4l2_find_format(int video_fd, unsigned int type, unsigned int pixelformat)
{
struct v4l2_fmtdesc fmtdesc;
@@ -76,19 +136,31 @@ bool v4l2_find_format(int video_fd, unsigned int type, unsigned int pixelformat)
return false;
}
int v4l2_try_format(int video_fd, unsigned int type, unsigned int width,
unsigned int height, unsigned int pixelformat)
{
struct v4l2_format format;
int rc;
v4l2_setup_format(&format, type, width, height, pixelformat);
rc = ioctl(video_fd, VIDIOC_TRY_FMT, &format);
if (rc < 0) {
request_log("Unable to try format for type %d: %s\n", type,
strerror(errno));
return -1;
}
return 0;
}
int v4l2_set_format(int video_fd, unsigned int type, unsigned int pixelformat,
unsigned int width, unsigned int height)
{
struct v4l2_format format;
int rc;
memset(&format, 0, sizeof(format));
format.type = type;
format.fmt.pix_mp.width = width;
format.fmt.pix_mp.height = height;
format.fmt.pix_mp.plane_fmt[0].sizeimage =
type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE ? SOURCE_SIZE_MAX : 0;
format.fmt.pix_mp.pixelformat = pixelformat;
v4l2_setup_format(&format, type, width, height, pixelformat);
rc = ioctl(video_fd, VIDIOC_S_FMT, &format);
if (rc < 0) {
@@ -119,29 +191,46 @@ int v4l2_get_format(int video_fd, unsigned int type, unsigned int *width,
return -1;
}
count = format.fmt.pix_mp.num_planes;
if (v4l2_type_is_mplane(type)) {
count = format.fmt.pix_mp.num_planes;
if (width != NULL)
*width = format.fmt.pix_mp.width;
if (width != NULL)
*width = format.fmt.pix_mp.width;
if (height != NULL)
*height = format.fmt.pix_mp.height;
if (height != NULL)
*height = format.fmt.pix_mp.height;
if (planes_count != NULL)
if (*planes_count > 0 && *planes_count < count)
count = *planes_count;
if (planes_count != NULL)
if (*planes_count > 0 && *planes_count < count)
count = *planes_count;
if (bytesperline != NULL)
for (i = 0; i < count; i++)
bytesperline[i] =
format.fmt.pix_mp.plane_fmt[i].bytesperline;
if (bytesperline != NULL)
for (i = 0; i < count; i++)
bytesperline[i] =
format.fmt.pix_mp.plane_fmt[i].bytesperline;
if (sizes != NULL)
for (i = 0; i < count; i++)
sizes[i] = format.fmt.pix_mp.plane_fmt[i].sizeimage;
if (sizes != NULL)
for (i = 0; i < count; i++)
sizes[i] = format.fmt.pix_mp.plane_fmt[i].sizeimage;
if (planes_count != NULL)
*planes_count = count;
if (planes_count != NULL)
*planes_count = count;
} else {
if (width != NULL)
*width = format.fmt.pix.width;
if (height != NULL)
*height = format.fmt.pix.height;
if (bytesperline != NULL)
bytesperline[0] = format.fmt.pix.bytesperline;
if (sizes != NULL)
sizes[0] = format.fmt.pix.sizeimage;
if (planes_count != NULL)
*planes_count = 1;
}
return 0;
}
@@ -201,13 +290,21 @@ int v4l2_query_buffer(int video_fd, unsigned int type, unsigned int index,
return -1;
}
if (lengths != NULL)
for (i = 0; i < buffer.length; i++)
lengths[i] = buffer.m.planes[i].length;
if (v4l2_type_is_mplane(type)) {
if (lengths != NULL)
for (i = 0; i < buffer.length; i++)
lengths[i] = buffer.m.planes[i].length;
if (offsets != NULL)
for (i = 0; i < buffer.length; i++)
offsets[i] = buffer.m.planes[i].m.mem_offset;
if (offsets != NULL)
for (i = 0; i < buffer.length; i++)
offsets[i] = buffer.m.planes[i].m.mem_offset;
} else {
if (lengths != NULL)
lengths[0] = buffer.length;
if (offsets != NULL)
offsets[0] = buffer.m.offset;
}
return 0;
}