avcodec: use int instead of enum for AVOption fields

AVOption with AV_OPT_TYPE_INT assumes the field is int (4 bytes),
but enum size is implementation-defined and may be smaller.
This can cause memory corruption when AVOption writes 4 bytes
to a field that is only 1-2 bytes, potentially overwriting
adjacent struct members.

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>

libavcodec/amfenc.h

@@ -115,8 +115,10 @@ typedef struct AMFEncoderContext {
 
     // AV1 - specific options
 
-    enum AMF_VIDEO_ENCODER_AV1_ALIGNMENT_MODE_ENUM                 align;
-    enum AMF_VIDEO_ENCODER_AV1_AQ_MODE_ENUM                        aq_mode;
+    /* enum AMF_VIDEO_ENCODER_AV1_ALIGNMENT_MODE_ENUM, use int for AVOption */
+    int                 align;
+    /* enum AMF_VIDEO_ENCODER_AV1_AQ_MODE_ENUM */
+    int                 aq_mode;
 
     // Preanalysis - specific options
 

libavcodec/bsf/filter_units.c

@@ -35,7 +35,8 @@ typedef struct FilterUnitsContext {
 
     const char *pass_types;
     const char *remove_types;
-    enum AVDiscard discard;
+    /* enum AVDiscard, use int for AVOption */
+    int discard;
     int discard_flags;
 
     enum {

libavcodec/hap.h

@@ -62,7 +62,8 @@ typedef struct HapContext {
 
     GetByteContext gbc;
 
-    enum HapTextureFormat opt_tex_fmt; /* Texture type (encoder only) */
+    /* enum HapTextureFormat, use int for AVOption */
+    int opt_tex_fmt; /* Texture type (encoder only) */
     int opt_chunk_count; /* User-requested chunk count (encoder only) */
     int opt_compressor; /* User-requested compressor (encoder only) */
 

libavcodec/huffyuvenc.c

@@ -48,7 +48,8 @@ typedef struct HYuvEncContext {
     AVClass *class;
     AVCodecContext *avctx;
     PutBitContext pb;
-    Predictor predictor;
+    /* Predictor, use int for AVOption */
+    int predictor;
     int interlaced;
     int decorrelate;
     int bitstream_bpp;