[PATCH v2 1/6] qcap/videocapture: Storage capabilities information.

[Jactry Zeng]

Signed-off-by: Jactry Zeng <jzeng at codeweavers.com>
---
 dlls/qcap/v4l.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 115 insertions(+), 3 deletions(-)

diff --git a/dlls/qcap/v4l.c b/dlls/qcap/v4l.c
index 6fe92d2d0a..a370c7583a 100644
--- a/dlls/qcap/v4l.c
+++ b/dlls/qcap/v4l.c
@@ -93,9 +93,19 @@ static BOOL video_init(void)
 #endif
 }
 
+struct caps
+{
+    __u32 pixelformat;
+    AM_MEDIA_TYPE media_type;
+    VIDEOINFOHEADER video_info;
+    VIDEO_STREAM_CONFIG_CAPS config;
+};
+
 struct _Capture
 {
     UINT width, height, bitDepth, fps, outputwidth, outputheight;
+    struct caps *caps;
+    LONG caps_count;
     BOOL swresize;
 
     struct strmbase_source *pin;
@@ -120,9 +130,12 @@ HRESULT qcap_driver_destroy(Capture *capBox)
 {
     TRACE("%p\n", capBox);
 
-    if( capBox->fd != -1 )
+    if (capBox->fd != -1)
         video_close(capBox->fd);
-    CoTaskMemFree(capBox);
+    if (capBox->caps_count)
+        heap_free(capBox->caps);
+    heap_free(capBox);
+
     return S_OK;
 }
 
@@ -495,6 +508,41 @@ void qcap_driver_cleanup_stream(Capture *device)
         ERR("Failed to decommit allocator, hr %#x.\n", hr);
 }
 
+
+static void fill_caps(__u32 pixelformat, __u32 width, __u32 height,
+        __u32 max_fps, __u32 min_fps, struct caps *caps)
+{
+    LONG depth = 24;
+
+    caps->video_info.dwBitRate = width * height * depth * max_fps;
+    caps->video_info.bmiHeader.biSize = sizeof(caps->video_info.bmiHeader);
+    caps->video_info.bmiHeader.biWidth = width;
+    caps->video_info.bmiHeader.biHeight = height;
+    caps->video_info.bmiHeader.biPlanes = 1;
+    caps->video_info.bmiHeader.biBitCount = depth;
+    caps->video_info.bmiHeader.biCompression = BI_RGB;
+    caps->video_info.bmiHeader.biSizeImage = width * height * depth / 8;
+    caps->media_type.majortype = MEDIATYPE_Video;
+    caps->media_type.subtype = MEDIASUBTYPE_RGB24;
+    caps->media_type.bFixedSizeSamples = TRUE;
+    caps->media_type.bTemporalCompression = FALSE;
+    caps->media_type.lSampleSize = width * height * depth / 8;
+    caps->media_type.formattype = FORMAT_VideoInfo;
+    caps->media_type.pUnk = NULL;
+    caps->media_type.cbFormat = sizeof(VIDEOINFOHEADER);
+    caps->media_type.pbFormat = (void *)&caps->video_info;
+    caps->config.MaxFrameInterval = 10000000 * max_fps;
+    caps->config.MinFrameInterval = 10000000 * min_fps;;
+    caps->config.MaxOutputSize.cx = width;
+    caps->config.MaxOutputSize.cy = height;
+    caps->config.MinOutputSize.cx = width;
+    caps->config.MinOutputSize.cy = height;
+    caps->config.guid = FORMAT_VideoInfo;
+    caps->config.MinBitsPerSecond = width * height * depth * min_fps;
+    caps->config.MaxBitsPerSecond = width * height * depth * max_fps;
+    caps->pixelformat = pixelformat;
+}
+
 Capture *qcap_driver_init(struct strmbase_source *pin, USHORT card)
 {
     struct v4l2_capability caps = {{0}};
@@ -506,7 +554,7 @@ Capture *qcap_driver_init(struct strmbase_source *pin, USHORT card)
 
     have_libv4l2 = video_init();
 
-    if (!(device = CoTaskMemAlloc(sizeof(*device))))
+    if (!(device = heap_alloc_zero(sizeof(*device))))
         return NULL;
 
     sprintf(path, "/dev/video%i", card);
@@ -559,6 +607,70 @@ Capture *qcap_driver_init(struct strmbase_source *pin, USHORT card)
         goto error;
     }
 
+    format.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24;
+    if (xioctl(fd, VIDIOC_TRY_FMT, &format) != -1
+            && format.fmt.pix.pixelformat == V4L2_PIX_FMT_BGR24)
+    {
+        struct v4l2_frmsizeenum frmsize = {0};
+
+        frmsize.pixel_format = format.fmt.pix.pixelformat;
+        while(xioctl(fd, VIDIOC_ENUM_FRAMESIZES, &frmsize) != -1)
+        {
+            struct v4l2_frmivalenum frmival = {0};
+            __u32 max_fps = 30, min_fps = 30;
+            struct caps *new_caps;
+
+            frmival.pixel_format = format.fmt.pix.pixelformat;
+            if (frmsize.type == V4L2_FRMSIZE_TYPE_DISCRETE)
+            {
+                frmival.width = frmsize.discrete.width;
+                frmival.height = frmsize.discrete.height;
+            }
+            else if (frmsize.type == V4L2_FRMSIZE_TYPE_STEPWISE)
+            {
+                frmival.width = frmsize.stepwise.max_width;
+                frmival.height = frmsize.stepwise.min_height;
+            }
+            else
+            {
+                FIXME("Unhandled frame size type: %d.\n", frmsize.type);
+                continue;
+            }
+
+            if (xioctl(fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival) != -1)
+            {
+                if (frmival.type == V4L2_FRMIVAL_TYPE_DISCRETE)
+                {
+                    max_fps = frmival.discrete.denominator / frmival.discrete.numerator;
+                    min_fps = max_fps;
+                }
+                else if (frmival.type == V4L2_FRMIVAL_TYPE_STEPWISE
+                        || frmival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS)
+                {
+                    max_fps = frmival.stepwise.max.denominator / frmival.stepwise.max.numerator;
+                    min_fps = frmival.stepwise.min.denominator / frmival.stepwise.min.numerator;
+                }
+            }
+            else
+                ERR("Failed to get fps: %s.\n", strerror(errno));
+
+            new_caps = heap_realloc(device->caps, (device->caps_count + 1) * sizeof(*device->caps));
+            if (!new_caps)
+                goto error;
+            device->caps = new_caps;
+            fill_caps(format.fmt.pix.pixelformat, frmsize.discrete.width, frmsize.discrete.height,
+                    max_fps, min_fps, &device->caps[device->caps_count]);
+            device->caps_count++;
+
+            frmsize.index++;
+        }
+    }
+    else
+    {
+        ERR("This device doesn't support V4L2_PIX_FMT_BGR24 format.\n");
+        goto error;
+    }
+
     format.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24;
     if (xioctl(fd, VIDIOC_S_FMT, &format) == -1
             || format.fmt.pix.pixelformat != V4L2_PIX_FMT_BGR24)
-- 
2.26.2