diff --git a/codec_context.go b/codec_context.go
index e819596..714fbf0 100644
--- a/codec_context.go
+++ b/codec_context.go
@@ -347,8 +347,8 @@ func (cc *CodecContext) SetHardwareDeviceContext(hdc *HardwareDeviceContext) {
 }
 
 func (cc *CodecContext) SetHardwareFrameContext(hfc *HardwareFrameContext) {
-	if cc.c.hw_frames_ctx != nil {
-		C.av_buffer_unref(&cc.c.hw_frames_ctx)
+	if cc.hfc != nil {
+		C.av_buffer_unref(&cc.hfc.c)
 	}
 	cc.hfc = hfc
 	if cc.hfc != nil {
diff --git a/frame.go b/frame.go
index 252a027..b7adbdc 100644
--- a/frame.go
+++ b/frame.go
@@ -33,8 +33,8 @@ func (f *Frame) AllocBuffer(align int) error {
 	return newError(C.av_frame_get_buffer(f.c, C.int(align)))
 }
 
-func (f *Frame) AllocHWBuffer(hfc *HardwareFrameContext, align int) error {
-	return newError(C.av_hwframe_get_buffer(hfc.c, f.c, C.int(align)))
+func (f *Frame) AllocHardwareBuffer(hfc *HardwareFrameContext) error {
+	return newError(C.av_hwframe_get_buffer(hfc.c, f.c, 0))
 }
 
 func (f *Frame) AllocImage(align int) error {
diff --git a/hardware_frame_context.go b/hardware_frame_context.go
index 39bbe2c..9aeb2ae 100644
--- a/hardware_frame_context.go
+++ b/hardware_frame_context.go
@@ -3,46 +3,49 @@ package astiav
 //#include <libavcodec/avcodec.h>
 import "C"
 import (
-	"fmt"
 	"unsafe"
 )
 
+// https://github.com/FFmpeg/FFmpeg/blob/n7.0/libavutil/hwcontext.h#L115
 type HardwareFrameContext struct {
 	c *C.struct_AVBufferRef
 }
 
-func AllocHardwareFrameContext(hdc *HardwareDeviceContext) (*HardwareFrameContext, error) {
-	if hfc := C.av_hwframe_ctx_alloc(hdc.c); hfc != nil {
-		return &HardwareFrameContext{c: hfc}, nil
+func newHardwareFrameContextFromC(c *C.struct_AVBufferRef) *HardwareFrameContext {
+	if c == nil {
+		return nil
 	}
-	return nil, fmt.Errorf("failed to allocate hardware frame context")
+	return &HardwareFrameContext{c: c}
+}
+
+func AllocHardwareFrameContext(hdc *HardwareDeviceContext) *HardwareFrameContext {
+	return newHardwareFrameContextFromC(C.av_hwframe_ctx_alloc(hdc.c))
+}
+
+func (hfc *HardwareFrameContext) data() *C.AVHWFramesContext {
+	return (*C.AVHWFramesContext)(unsafe.Pointer((hfc.c.data)))
 }
 
 func (hfc *HardwareFrameContext) SetWidth(width int) {
-	frameCtx := (*C.AVHWFramesContext)(unsafe.Pointer((hfc.c.data)))
-	frameCtx.width = C.int(width)
+	hfc.data().width = C.int(width)
 }
 
 func (hfc *HardwareFrameContext) SetHeight(height int) {
-	frameCtx := (*C.AVHWFramesContext)(unsafe.Pointer((hfc.c.data)))
-	frameCtx.height = C.int(height)
+	hfc.data().height = C.int(height)
 }
 
-func (hfc *HardwareFrameContext) SetFormat(format PixelFormat) {
-	frameCtx := (*C.AVHWFramesContext)(unsafe.Pointer((hfc.c.data)))
-	frameCtx.format = C.enum_AVPixelFormat(format)
+func (hfc *HardwareFrameContext) SetPixelFormat(format PixelFormat) {
+	hfc.data().format = C.enum_AVPixelFormat(format)
 }
 
-func (hfc *HardwareFrameContext) SetSWFormat(swFormat PixelFormat) {
-	frameCtx := (*C.AVHWFramesContext)(unsafe.Pointer((hfc.c.data)))
-	frameCtx.sw_format = C.enum_AVPixelFormat(swFormat)
+func (hfc *HardwareFrameContext) SetSoftwarePixelFormat(swFormat PixelFormat) {
+	hfc.data().sw_format = C.enum_AVPixelFormat(swFormat)
 }
 
 func (hfc *HardwareFrameContext) SetInitialPoolSize(initialPoolSize int) {
-	frameCtx := (*C.AVHWFramesContext)(unsafe.Pointer((hfc.c.data)))
-	frameCtx.initial_pool_size = C.int(initialPoolSize)
+	hfc.data().initial_pool_size = C.int(initialPoolSize)
 }
 
-func (hfc *HardwareFrameContext) Init() error {
+func (hfc *HardwareFrameContext) Initialize() error {
 	return newError(C.av_hwframe_ctx_init(hfc.c))
 }