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v4l2: work on format enumeration

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Start work on format enumeration
fix fd leak in v4l2-source
Improve spa-inspect output
This commit is contained in:
Wim Taymans 2016-07-15 13:20:20 +02:00
parent 61caf0e19c
commit 77bc2a1793
6 changed files with 282 additions and 84 deletions
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108
spa/plugins/v4l2/v4l2-utils.c
View file

@ -256,6 +256,112 @@ video_format_to_fourcc (SpaVideoFormat format)
return fourcc;
}
#define FOURCC_ARGS(f) (f)&0x7f,((f)>>8)&0x7f,((f)>>16)&0x7f,((f)>>24)&0x7f
static SpaResult
spa_v4l2_enum_format (SpaV4l2Source *this, SpaFormat **format, void **cookie)
{
SpaV4l2State *state = &this->state[0];
int res;
if (spa_v4l2_open (this) < 0)
return SPA_RESULT_ERROR;
*format = NULL;
if (*cookie == NULL) {
CLEAR (state->fmtdesc);
state->fmtdesc.index = 0;
state->fmtdesc.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
state->next_fmtdesc = true;
CLEAR (state->frmsize);
state->next_frmsize = true;
CLEAR (state->frmival);
state->next_frmival = true;
*cookie = state;
}
again:
if (state->next_fmtdesc) {
if ((res = xioctl (state->fd, VIDIOC_ENUM_FMT, &state->fmtdesc)) < 0) {
if (errno != EINVAL)
perror ("VIDIOC_ENUM_FMT");
return SPA_RESULT_ENUM_END;
}
state->next_fmtdesc = false;
state->frmsize.index = 0;
state->frmsize.pixel_format = state->fmtdesc.pixelformat;
state->next_frmsize = true;
}
if (state->next_frmsize) {
if ((res = xioctl (state->fd, VIDIOC_ENUM_FRAMESIZES, &state->frmsize)) < 0) {
if (errno == EINVAL) {
state->fmtdesc.index++;
state->next_fmtdesc = true;
goto again;
}
perror ("VIDIOC_ENUM_FRAMESIZES");
return SPA_RESULT_ENUM_END;
}
state->next_frmsize = false;
if (state->frmsize.type == V4L2_FRMSIZE_TYPE_DISCRETE) {
state->frmival.index = 0;
state->frmival.pixel_format = state->frmsize.pixel_format;
state->frmival.width = state->frmsize.discrete.width;
state->frmival.height = state->frmsize.discrete.height;
state->next_frmival = true;
}
}
if (state->next_frmival) {
if ((res = xioctl (state->fd, VIDIOC_ENUM_FRAMEINTERVALS, &state->frmival)) < 0) {
if (errno == EINVAL) {
state->frmsize.index++;
state->next_frmsize = true;
goto again;
}
perror ("VIDIOC_ENUM_FRAMEINTERVALS");
return SPA_RESULT_ENUM_END;
}
state->frmival.index++;
}
fprintf (stderr, "format %c%c%c%c\n", FOURCC_ARGS (state->fmtdesc.pixelformat));
if (state->frmsize.type == V4L2_FRMSIZE_TYPE_DISCRETE) {
fprintf (stderr, "size %dx%d\n", state->frmsize.discrete.width, state->frmsize.discrete.height);
} else if (state->frmsize.type == V4L2_FRMSIZE_TYPE_STEPWISE) {
fprintf (stderr, "size %dx%d - %dx%d with step %d/%d\n",
state->frmsize.stepwise.min_width,
state->frmsize.stepwise.min_height,
state->frmsize.stepwise.max_width,
state->frmsize.stepwise.max_height,
state->frmsize.stepwise.step_width,
state->frmsize.stepwise.step_height);
}
if (state->frmival.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
fprintf (stderr, "framerate %u/%u\n",
state->frmival.discrete.numerator,
state->frmival.discrete.denominator);
} else if (state->frmival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS) {
fprintf (stderr, "framerate %u/%u - %u/%u\n",
state->frmival.stepwise.min.numerator,
state->frmival.stepwise.min.denominator,
state->frmival.stepwise.max.numerator,
state->frmival.stepwise.max.denominator);
} else if (state->frmival.type == V4L2_FRMIVAL_TYPE_STEPWISE) {
fprintf (stderr, "framerate %u/%u - %u/%u step %u/%u\n",
state->frmival.stepwise.min.numerator,
state->frmival.stepwise.min.denominator,
state->frmival.stepwise.max.numerator,
state->frmival.stepwise.max.denominator,
state->frmival.stepwise.step.numerator,
state->frmival.stepwise.step.denominator);
}
return SPA_RESULT_OK;
}
static int
spa_v4l2_set_format (SpaV4l2Source *this, SpaFormat *format, bool try_only)
@ -493,6 +599,8 @@ mmap_init (SpaV4l2Source *this)
fprintf (stderr, "can't allocate enough buffers\n");
return -1;
}
if (state->export_buf)
fprintf (stderr, "using EXPBUF\n");
state->reqbuf = reqbuf;