Add a function to get the corresponding AVHWDeviceType from a given
hardware pixel format.
Signed-off-by: Tong Wu <tong1...@intel.com>
---
libavutil/hwcontext.c | 11 +++++++++++
libavutil/hwcontext.h | 12 ++++++++++++
2 files changed, 23 insertions(+)
diff --git a/libavutil/hwcontext.c b/libavutil/hwcontext.c
index ab9ad3703e..4d14cb2cb4 100644
--- a/libavutil/hwcontext.c
+++ b/libavutil/hwcontext.c
@@ -80,6 +80,17 @@ static const char *const hw_type_names[] = {
[AV_HWDEVICE_TYPE_VULKAN] = "vulkan",
};
+enum AVHWDeviceType av_hwdevice_get_type_by_pix_fmt(enum AVPixelFormat fmt)
+{
+ for (int i = 0; hw_table[i]; i++) {
+ for (int j = 0; hw_table[i]->pix_fmts[j] != AV_PIX_FMT_NONE; j++) {
+ if (hw_table[i]->pix_fmts[j] == fmt)
+ return hw_table[i]->type;
+ }
+ }
+ return AV_HWDEVICE_TYPE_NONE;
+}
+
enum AVHWDeviceType av_hwdevice_find_type_by_name(const char *name)
{
int type;
diff --git a/libavutil/hwcontext.h b/libavutil/hwcontext.h
index c18b7e1e8b..49f3a799ed 100644
--- a/libavutil/hwcontext.h
+++ b/libavutil/hwcontext.h
@@ -229,6 +229,18 @@ typedef struct AVHWFramesContext {
int width, height;
} AVHWFramesContext;
+/**
+ * Get the device type by a given pixel format.
+ *
+ * This function only returns a preferred device type which supports the given
+ * pixel format. There is no guarantee that the device type is unique.
+ *
+ * @param fmt Pixel format from enum AVPixelFormat.
+ * @return The type from enum AVHWDeviceType, or AV_HWDEVICE_TYPE_NONE if
+ * not found.
+ */
+enum AVHWDeviceType av_hwdevice_get_type_by_pix_fmt(enum AVPixelFormat fmt);
+
/**
* Look up an AVHWDeviceType by name.
*
--
2.35.1.windows.2
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