From 0b1794a43e1083644aa3db2a09323681cfe080ec Mon Sep 17 00:00:00 2001 From: Mark Thompson Date: Sat, 4 Mar 2017 23:57:29 +0000 Subject: hwcontext: Make it easier to work with device types Adds functions to convert to/from strings and a function to iterate over all supported device types. Also adds a new invalid type AV_HWDEVICE_TYPE_NONE, which acts as a sentinel value. (cherry picked from commit b7487f4f3c39b4b202e1ea7bb2de13902f2dee45) --- libavutil/hwcontext.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) (limited to 'libavutil/hwcontext.h') diff --git a/libavutil/hwcontext.h b/libavutil/hwcontext.h index 782dbf22e1..37e8831f6b 100644 --- a/libavutil/hwcontext.h +++ b/libavutil/hwcontext.h @@ -31,6 +31,7 @@ enum AVHWDeviceType { AV_HWDEVICE_TYPE_DXVA2, AV_HWDEVICE_TYPE_QSV, AV_HWDEVICE_TYPE_VIDEOTOOLBOX, + AV_HWDEVICE_TYPE_NONE, }; typedef struct AVHWDeviceInternal AVHWDeviceInternal; @@ -223,6 +224,33 @@ typedef struct AVHWFramesContext { int width, height; } AVHWFramesContext; +/** + * Look up an AVHWDeviceType by name. + * + * @param name String name of the device type (case-insensitive). + * @return The type from enum AVHWDeviceType, or AV_HWDEVICE_TYPE_NONE if + * not found. + */ +enum AVHWDeviceType av_hwdevice_find_type_by_name(const char *name); + +/** Get the string name of an AVHWDeviceType. + * + * @param type Type from enum AVHWDeviceType. + * @return Pointer to a static string containing the name, or NULL if the type + * is not valid. + */ +const char *av_hwdevice_get_type_name(enum AVHWDeviceType type); + +/** + * Iterate over supported device types. + * + * @param type AV_HWDEVICE_TYPE_NONE initially, then the previous type + * returned by this function in subsequent iterations. + * @return The next usable device type from enum AVHWDeviceType, or + * AV_HWDEVICE_TYPE_NONE if there are no more. + */ +enum AVHWDeviceType av_hwdevice_iterate_types(enum AVHWDeviceType prev); + /** * Allocate an AVHWDeviceContext for a given hardware type. * -- cgit v1.2.3