diff --git a/libavcodec/hevc.h b/libavcodec/hevc.h
index 4237b80f81..de77d2ac43 100644
--- a/libavcodec/hevc.h
+++ b/libavcodec/hevc.h
@@ -52,6 +52,12 @@ enum HEVCNALUnitType {
     HEVC_NAL_SEI_SUFFIX = 40,
 };
 
+enum HEVCSliceType {
+    HEVC_SLICE_B = 0,
+    HEVC_SLICE_P = 1,
+    HEVC_SLICE_I = 2,
+};
+
 /**
  * 7.4.2.1
  */
diff --git a/libavcodec/hevc_cabac.c b/libavcodec/hevc_cabac.c
index 205fc4edef..e27c54ed4b 100644
--- a/libavcodec/hevc_cabac.c
+++ b/libavcodec/hevc_cabac.c
@@ -26,6 +26,7 @@
 
 #include "cabac_functions.h"
 #include "hevc_data.h"
+#include "hevc.h"
 #include "hevcdec.h"
 
 #define CABAC_MAX_BIN 31
@@ -481,7 +482,7 @@ static void cabac_init_state(HEVCContext *s)
     int init_type = 2 - s->sh.slice_type;
     int i;
 
-    if (s->sh.cabac_init_flag && s->sh.slice_type != I_SLICE)
+    if (s->sh.cabac_init_flag && s->sh.slice_type != HEVC_SLICE_I)
         init_type ^= 3;
 
     for (i = 0; i < HEVC_CONTEXTS; i++) {
diff --git a/libavcodec/hevc_mvs.c b/libavcodec/hevc_mvs.c
index edad491406..a8f7876b59 100644
--- a/libavcodec/hevc_mvs.c
+++ b/libavcodec/hevc_mvs.c
@@ -21,6 +21,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "hevc.h"
 #include "hevcdec.h"
 
 static const uint8_t l0_l1_cand_idx[12][2] = {
@@ -315,7 +316,7 @@ static void derive_spatial_merge_candidates(HEVCContext *s, int x0, int y0,
     const int xB2    = x0 - 1;
     const int yB2    = y0 - 1;
 
-    const int nb_refs = (s->sh.slice_type == P_SLICE) ?
+    const int nb_refs = (s->sh.slice_type == HEVC_SLICE_P) ?
                         s->sh.nb_refs[0] : FFMIN(s->sh.nb_refs[0], s->sh.nb_refs[1]);
 
     int zero_idx = 0;
@@ -411,7 +412,7 @@ static void derive_spatial_merge_candidates(HEVCContext *s, int x0, int y0,
         Mv mv_l0_col = { 0 }, mv_l1_col = { 0 };
         int available_l0 = temporal_luma_motion_vector(s, x0, y0, nPbW, nPbH,
                                                        0, &mv_l0_col, 0);
-        int available_l1 = (s->sh.slice_type == B_SLICE) ?
+        int available_l1 = (s->sh.slice_type == HEVC_SLICE_B) ?
                            temporal_luma_motion_vector(s, x0, y0, nPbW, nPbH,
                                                        0, &mv_l1_col, 1) : 0;
 
@@ -430,7 +431,7 @@ static void derive_spatial_merge_candidates(HEVCContext *s, int x0, int y0,
     nb_orig_merge_cand = nb_merge_cand;
 
     // combined bi-predictive merge candidates  (applies for B slices)
-    if (s->sh.slice_type == B_SLICE && nb_orig_merge_cand > 1 &&
+    if (s->sh.slice_type == HEVC_SLICE_B && nb_orig_merge_cand > 1 &&
         nb_orig_merge_cand < s->sh.max_num_merge_cand) {
         int comb_idx = 0;
 
@@ -459,7 +460,7 @@ static void derive_spatial_merge_candidates(HEVCContext *s, int x0, int y0,
 
     // append Zero motion vector candidates
     while (nb_merge_cand < s->sh.max_num_merge_cand) {
-        mergecandlist[nb_merge_cand].pred_flag    = PF_L0 + ((s->sh.slice_type == B_SLICE) << 1);
+        mergecandlist[nb_merge_cand].pred_flag    = PF_L0 + ((s->sh.slice_type == HEVC_SLICE_B) << 1);
         AV_ZERO32(mergecandlist[nb_merge_cand].mv + 0);
         AV_ZERO32(mergecandlist[nb_merge_cand].mv + 1);
         mergecandlist[nb_merge_cand].ref_idx[0]   = zero_idx < nb_refs ? zero_idx : 0;
diff --git a/libavcodec/hevc_parser.c b/libavcodec/hevc_parser.c
index 2a5190dcb8..310428d0ff 100644
--- a/libavcodec/hevc_parser.c
+++ b/libavcodec/hevc_parser.c
@@ -360,14 +360,14 @@ static inline int parse_nal_units(AVCodecParserContext *s, const uint8_t *buf,
                 skip_bits(gb, 1); // slice_reserved_undetermined_flag[]
 
             sh->slice_type = get_ue_golomb(gb);
-            if (!(sh->slice_type == I_SLICE || sh->slice_type == P_SLICE ||
-                  sh->slice_type == B_SLICE)) {
+            if (!(sh->slice_type == HEVC_SLICE_I || sh->slice_type == HEVC_SLICE_P ||
+                  sh->slice_type == HEVC_SLICE_B)) {
                 av_log(avctx, AV_LOG_ERROR, "Unknown slice type: %d.\n",
                        sh->slice_type);
                 return AVERROR_INVALIDDATA;
             }
-            s->pict_type = sh->slice_type == B_SLICE ? AV_PICTURE_TYPE_B :
-                           sh->slice_type == P_SLICE ? AV_PICTURE_TYPE_P :
+            s->pict_type = sh->slice_type == HEVC_SLICE_B ? AV_PICTURE_TYPE_B :
+                           sh->slice_type == HEVC_SLICE_P ? AV_PICTURE_TYPE_P :
                                                        AV_PICTURE_TYPE_I;
 
             if (ps->pps->output_flag_present_flag)
diff --git a/libavcodec/hevc_refs.c b/libavcodec/hevc_refs.c
index 935e388653..9103c84686 100644
--- a/libavcodec/hevc_refs.c
+++ b/libavcodec/hevc_refs.c
@@ -300,7 +300,7 @@ int ff_hevc_slice_rpl(HEVCContext *s)
 {
     SliceHeader *sh = &s->sh;
 
-    uint8_t nb_list = sh->slice_type == B_SLICE ? 2 : 1;
+    uint8_t nb_list = sh->slice_type == HEVC_SLICE_B ? 2 : 1;
     uint8_t list_idx;
     int i, j, ret;
 
diff --git a/libavcodec/hevcdec.c b/libavcodec/hevcdec.c
index 92897f42f8..98ed2a022b 100644
--- a/libavcodec/hevcdec.c
+++ b/libavcodec/hevcdec.c
@@ -192,7 +192,7 @@ static void pred_weight_table(HEVCContext *s, GetBitContext *gb)
             s->sh.chroma_offset_l0[i][1] = 0;
         }
     }
-    if (s->sh.slice_type == B_SLICE) {
+    if (s->sh.slice_type == HEVC_SLICE_B) {
         for (i = 0; i < s->sh.nb_refs[L1]; i++) {
             luma_weight_l1_flag[i] = get_bits1(gb);
             if (!luma_weight_l1_flag[i]) {
@@ -510,14 +510,14 @@ static int hls_slice_header(HEVCContext *s)
             skip_bits(gb, 1);  // slice_reserved_undetermined_flag[]
 
         sh->slice_type = get_ue_golomb_long(gb);
-        if (!(sh->slice_type == I_SLICE ||
-              sh->slice_type == P_SLICE ||
-              sh->slice_type == B_SLICE)) {
+        if (!(sh->slice_type == HEVC_SLICE_I ||
+              sh->slice_type == HEVC_SLICE_P ||
+              sh->slice_type == HEVC_SLICE_B)) {
             av_log(s->avctx, AV_LOG_ERROR, "Unknown slice type: %d.\n",
                    sh->slice_type);
             return AVERROR_INVALIDDATA;
         }
-        if (IS_IRAP(s) && sh->slice_type != I_SLICE) {
+        if (IS_IRAP(s) && sh->slice_type != HEVC_SLICE_I) {
             av_log(s->avctx, AV_LOG_ERROR, "Inter slices in an IRAP frame.\n");
             return AVERROR_INVALIDDATA;
         }
@@ -608,16 +608,16 @@ static int hls_slice_header(HEVCContext *s)
         }
 
         sh->nb_refs[L0] = sh->nb_refs[L1] = 0;
-        if (sh->slice_type == P_SLICE || sh->slice_type == B_SLICE) {
+        if (sh->slice_type == HEVC_SLICE_P || sh->slice_type == HEVC_SLICE_B) {
             int nb_refs;
 
             sh->nb_refs[L0] = s->ps.pps->num_ref_idx_l0_default_active;
-            if (sh->slice_type == B_SLICE)
+            if (sh->slice_type == HEVC_SLICE_B)
                 sh->nb_refs[L1] = s->ps.pps->num_ref_idx_l1_default_active;
 
             if (get_bits1(gb)) { // num_ref_idx_active_override_flag
                 sh->nb_refs[L0] = get_ue_golomb_long(gb) + 1;
-                if (sh->slice_type == B_SLICE)
+                if (sh->slice_type == HEVC_SLICE_B)
                     sh->nb_refs[L1] = get_ue_golomb_long(gb) + 1;
             }
             if (sh->nb_refs[L0] > HEVC_MAX_REFS || sh->nb_refs[L1] > HEVC_MAX_REFS) {
@@ -641,7 +641,7 @@ static int hls_slice_header(HEVCContext *s)
                         sh->list_entry_lx[0][i] = get_bits(gb, av_ceil_log2(nb_refs));
                 }
 
-                if (sh->slice_type == B_SLICE) {
+                if (sh->slice_type == HEVC_SLICE_B) {
                     sh->rpl_modification_flag[1] = get_bits1(gb);
                     if (sh->rpl_modification_flag[1] == 1)
                         for (i = 0; i < sh->nb_refs[L1]; i++)
@@ -649,7 +649,7 @@ static int hls_slice_header(HEVCContext *s)
                 }
             }
 
-            if (sh->slice_type == B_SLICE)
+            if (sh->slice_type == HEVC_SLICE_B)
                 sh->mvd_l1_zero_flag = get_bits1(gb);
 
             if (s->ps.pps->cabac_init_present_flag)
@@ -660,7 +660,7 @@ static int hls_slice_header(HEVCContext *s)
             sh->collocated_ref_idx = 0;
             if (sh->slice_temporal_mvp_enabled_flag) {
                 sh->collocated_list = L0;
-                if (sh->slice_type == B_SLICE)
+                if (sh->slice_type == HEVC_SLICE_B)
                     sh->collocated_list = !get_bits1(gb);
 
                 if (sh->nb_refs[sh->collocated_list] > 1) {
@@ -674,8 +674,8 @@ static int hls_slice_header(HEVCContext *s)
                 }
             }
 
-            if ((s->ps.pps->weighted_pred_flag   && sh->slice_type == P_SLICE) ||
-                (s->ps.pps->weighted_bipred_flag && sh->slice_type == B_SLICE)) {
+            if ((s->ps.pps->weighted_pred_flag   && sh->slice_type == HEVC_SLICE_P) ||
+                (s->ps.pps->weighted_bipred_flag && sh->slice_type == HEVC_SLICE_B)) {
                 pred_weight_table(s, gb);
             }
 
@@ -1347,8 +1347,8 @@ static void luma_mc_uni(HEVCContext *s, uint8_t *dst, ptrdiff_t dststride,
     int pic_height       = s->ps.sps->height;
     int mx               = mv->x & 3;
     int my               = mv->y & 3;
-    int weight_flag      = (s->sh.slice_type == P_SLICE && s->ps.pps->weighted_pred_flag) ||
-                           (s->sh.slice_type == B_SLICE && s->ps.pps->weighted_bipred_flag);
+    int weight_flag      = (s->sh.slice_type == HEVC_SLICE_P && s->ps.pps->weighted_pred_flag) ||
+                           (s->sh.slice_type == HEVC_SLICE_B && s->ps.pps->weighted_bipred_flag);
     int idx              = ff_hevc_pel_weight[block_w];
 
     x_off += mv->x >> 2;
@@ -1410,8 +1410,8 @@ static void luma_mc_uni(HEVCContext *s, uint8_t *dst, ptrdiff_t dststride,
     int my0              = mv0->y & 3;
     int mx1              = mv1->x & 3;
     int my1              = mv1->y & 3;
-    int weight_flag      = (s->sh.slice_type == P_SLICE && s->ps.pps->weighted_pred_flag) ||
-                           (s->sh.slice_type == B_SLICE && s->ps.pps->weighted_bipred_flag);
+    int weight_flag      = (s->sh.slice_type == HEVC_SLICE_P && s->ps.pps->weighted_pred_flag) ||
+                           (s->sh.slice_type == HEVC_SLICE_B && s->ps.pps->weighted_bipred_flag);
     int x_off0           = x_off + (mv0->x >> 2);
     int y_off0           = y_off + (mv0->y >> 2);
     int x_off1           = x_off + (mv1->x >> 2);
@@ -1496,8 +1496,8 @@ static void chroma_mc_uni(HEVCContext *s, uint8_t *dst0,
     int pic_width        = s->ps.sps->width >> s->ps.sps->hshift[1];
     int pic_height       = s->ps.sps->height >> s->ps.sps->vshift[1];
     const Mv *mv         = &current_mv->mv[reflist];
-    int weight_flag      = (s->sh.slice_type == P_SLICE && s->ps.pps->weighted_pred_flag) ||
-                           (s->sh.slice_type == B_SLICE && s->ps.pps->weighted_bipred_flag);
+    int weight_flag      = (s->sh.slice_type == HEVC_SLICE_P && s->ps.pps->weighted_pred_flag) ||
+                           (s->sh.slice_type == HEVC_SLICE_B && s->ps.pps->weighted_bipred_flag);
     int idx              = ff_hevc_pel_weight[block_w];
     int hshift           = s->ps.sps->hshift[1];
     int vshift           = s->ps.sps->vshift[1];
@@ -1561,8 +1561,8 @@ static void chroma_mc_bi(HEVCContext *s, uint8_t *dst0, ptrdiff_t dststride, AVF
     uint8_t *src2        = ref1->data[cidx+1];
     ptrdiff_t src1stride = ref0->linesize[cidx+1];
     ptrdiff_t src2stride = ref1->linesize[cidx+1];
-    int weight_flag      = (s->sh.slice_type == P_SLICE && s->ps.pps->weighted_pred_flag) ||
-                           (s->sh.slice_type == B_SLICE && s->ps.pps->weighted_bipred_flag);
+    int weight_flag      = (s->sh.slice_type == HEVC_SLICE_P && s->ps.pps->weighted_pred_flag) ||
+                           (s->sh.slice_type == HEVC_SLICE_B && s->ps.pps->weighted_bipred_flag);
     int pic_width        = s->ps.sps->width >> s->ps.sps->hshift[1];
     int pic_height       = s->ps.sps->height >> s->ps.sps->vshift[1];
     Mv *mv0              = &current_mv->mv[0];
@@ -1662,7 +1662,7 @@ static void hevc_luma_mv_mvp_mode(HEVCContext *s, int x0, int y0, int nPbW,
 
     ff_hevc_set_neighbour_available(s, x0, y0, nPbW, nPbH);
     mv->pred_flag = 0;
-    if (s->sh.slice_type == B_SLICE)
+    if (s->sh.slice_type == HEVC_SLICE_B)
         inter_pred_idc = ff_hevc_inter_pred_idc_decode(s, nPbW, nPbH);
 
     if (inter_pred_idc != PRED_L1) {
@@ -2040,7 +2040,7 @@ static int hls_coding_unit(HEVCContext *s, int x0, int y0, int log2_cb_size)
     } else
         lc->cu.cu_transquant_bypass_flag = 0;
 
-    if (s->sh.slice_type != I_SLICE) {
+    if (s->sh.slice_type != HEVC_SLICE_I) {
         uint8_t skip_flag = ff_hevc_skip_flag_decode(s, x0, y0, x_cb, y_cb);
 
         x = y_cb * min_cb_width + x_cb;
@@ -2066,7 +2066,7 @@ static int hls_coding_unit(HEVCContext *s, int x0, int y0, int log2_cb_size)
     } else {
         int pcm_flag = 0;
 
-        if (s->sh.slice_type != I_SLICE)
+        if (s->sh.slice_type != HEVC_SLICE_I)
             lc->cu.pred_mode = ff_hevc_pred_mode_decode(s);
         if (lc->cu.pred_mode != MODE_INTRA ||
             log2_cb_size == s->ps.sps->log2_min_cb_size) {
@@ -2806,7 +2806,7 @@ static int decode_nal_unit(HEVCContext *s, const H2645NAL *nal)
         }
 
         if (!s->sh.dependent_slice_segment_flag &&
-            s->sh.slice_type != I_SLICE) {
+            s->sh.slice_type != HEVC_SLICE_I) {
             ret = ff_hevc_slice_rpl(s);
             if (ret < 0) {
                 av_log(s->avctx, AV_LOG_WARNING,
diff --git a/libavcodec/hevcdec.h b/libavcodec/hevcdec.h
index b6391eace8..0c7881286c 100644
--- a/libavcodec/hevcdec.h
+++ b/libavcodec/hevcdec.h
@@ -87,12 +87,6 @@ enum RPSType {
     NB_RPS_TYPE,
 };
 
-enum SliceType {
-    B_SLICE = 0,
-    P_SLICE = 1,
-    I_SLICE = 2,
-};
-
 enum SyntaxElement {
     SAO_MERGE_FLAG = 0,
     SAO_TYPE_IDX,
@@ -258,7 +252,7 @@ typedef struct SliceHeader {
     ///< address (in raster order) of the first block in the current slice
     unsigned int   slice_addr;
 
-    enum SliceType slice_type;
+    enum HEVCSliceType slice_type;
 
     int pic_order_cnt_lsb;
 
diff --git a/libavcodec/vaapi_encode_h265.c b/libavcodec/vaapi_encode_h265.c
index 754eb064a0..6e008b7b9c 100644
--- a/libavcodec/vaapi_encode_h265.c
+++ b/libavcodec/vaapi_encode_h265.c
@@ -25,7 +25,7 @@
 #include "libavutil/pixfmt.h"
 
 #include "avcodec.h"
-#include "hevcdec.h"
+#include "hevc.h"
 #include "internal.h"
 #include "put_bits.h"
 #include "vaapi_encode.h"
@@ -630,11 +630,11 @@ static void vaapi_encode_h265_write_slice_header2(PutBitContext *pbc,
             }
         }
 
-        if (vslice->slice_type == P_SLICE || vslice->slice_type == B_SLICE) {
+        if (vslice->slice_type == HEVC_SLICE_P || vslice->slice_type == HEVC_SLICE_B) {
             u(1, vslice_field(num_ref_idx_active_override_flag));
             if (vslice->slice_fields.bits.num_ref_idx_active_override_flag) {
                 ue(vslice_var(num_ref_idx_l0_active_minus1));
-                if (vslice->slice_type == B_SLICE) {
+                if (vslice->slice_type == HEVC_SLICE_B) {
                     ue(vslice_var(num_ref_idx_l1_active_minus1));
                 }
             }
@@ -643,21 +643,21 @@ static void vaapi_encode_h265_write_slice_header2(PutBitContext *pbc,
                 av_assert0(0);
                 // ref_pic_lists_modification()
             }
-            if (vslice->slice_type == B_SLICE) {
+            if (vslice->slice_type == HEVC_SLICE_B) {
                 u(1, vslice_field(mvd_l1_zero_flag));
             }
             if (mseq->cabac_init_present_flag) {
                 u(1, vslice_field(cabac_init_flag));
             }
             if (vslice->slice_fields.bits.slice_temporal_mvp_enabled_flag) {
-                if (vslice->slice_type == B_SLICE)
+                if (vslice->slice_type == HEVC_SLICE_B)
                     u(1, vslice_field(collocated_from_l0_flag));
                 ue(vpic->collocated_ref_pic_index, collocated_ref_idx);
             }
             if ((vpic->pic_fields.bits.weighted_pred_flag &&
-                 vslice->slice_type == P_SLICE) ||
+                 vslice->slice_type == HEVC_SLICE_P) ||
                 (vpic->pic_fields.bits.weighted_bipred_flag &&
-                 vslice->slice_type == B_SLICE)) {
+                 vslice->slice_type == HEVC_SLICE_B)) {
                 av_assert0(0);
                 // pred_weight_table()
             }
@@ -1055,13 +1055,13 @@ static int vaapi_encode_h265_init_slice_params(AVCodecContext *avctx,
     switch (pic->type) {
     case PICTURE_TYPE_IDR:
     case PICTURE_TYPE_I:
-        vslice->slice_type = I_SLICE;
+        vslice->slice_type = HEVC_SLICE_I;
         break;
     case PICTURE_TYPE_P:
-        vslice->slice_type = P_SLICE;
+        vslice->slice_type = HEVC_SLICE_P;
         break;
     case PICTURE_TYPE_B:
-        vslice->slice_type = B_SLICE;
+        vslice->slice_type = HEVC_SLICE_B;
         break;
     default:
         av_assert0(0 && "invalid picture type");
diff --git a/libavcodec/vaapi_hevc.c b/libavcodec/vaapi_hevc.c
index 6dd35db19e..69b8e478c6 100644
--- a/libavcodec/vaapi_hevc.c
+++ b/libavcodec/vaapi_hevc.c
@@ -297,9 +297,9 @@ static void fill_pred_weight_table(const HEVCContext *h,
     slice_param->delta_chroma_log2_weight_denom = 0;
     slice_param->luma_log2_weight_denom         = 0;
 
-    if (sh->slice_type == I_SLICE ||
-        (sh->slice_type == P_SLICE && !h->ps.pps->weighted_pred_flag) ||
-        (sh->slice_type == B_SLICE && !h->ps.pps->weighted_bipred_flag))
+    if (sh->slice_type == HEVC_SLICE_I ||
+        (sh->slice_type == HEVC_SLICE_P && !h->ps.pps->weighted_pred_flag) ||
+        (sh->slice_type == HEVC_SLICE_B && !h->ps.pps->weighted_bipred_flag))
         return;
 
     slice_param->luma_log2_weight_denom = sh->luma_log2_weight_denom;
@@ -317,7 +317,7 @@ static void fill_pred_weight_table(const HEVCContext *h,
         slice_param->ChromaOffsetL0[i][1] = sh->chroma_offset_l0[i][1];
     }
 
-    if (sh->slice_type == B_SLICE) {
+    if (sh->slice_type == HEVC_SLICE_B) {
         for (i = 0; i < 15 && i < sh->nb_refs[L1]; i++) {
             slice_param->delta_luma_weight_l1[i] = sh->luma_weight_l1[i] - (1 << sh->luma_log2_weight_denom);
             slice_param->luma_offset_l1[i] = sh->luma_offset_l1[i];
@@ -356,8 +356,8 @@ static int vaapi_hevc_decode_slice(AVCodecContext *avctx,
     const SliceHeader       *sh = &h->sh;
     VAAPIDecodePictureHEVC *pic = h->ref->hwaccel_picture_private;
 
-    int nb_list = (sh->slice_type == B_SLICE) ?
-                  2 : (sh->slice_type == I_SLICE ? 0 : 1);
+    int nb_list = (sh->slice_type == HEVC_SLICE_B) ?
+                  2 : (sh->slice_type == HEVC_SLICE_I ? 0 : 1);
 
     int err, i, list_idx;
 
@@ -387,7 +387,7 @@ static int vaapi_hevc_decode_slice(AVCodecContext *avctx,
         .slice_beta_offset_div2        = sh->beta_offset / 2,
         .slice_tc_offset_div2          = sh->tc_offset / 2,
         .collocated_ref_idx            = sh->slice_temporal_mvp_enabled_flag ? sh->collocated_ref_idx : 0xFF,
-        .five_minus_max_num_merge_cand = sh->slice_type == I_SLICE ? 0 : 5 - sh->max_num_merge_cand,
+        .five_minus_max_num_merge_cand = sh->slice_type == HEVC_SLICE_I ? 0 : 5 - sh->max_num_merge_cand,
         .num_ref_idx_l0_active_minus1  = sh->nb_refs[L0] ? sh->nb_refs[L0] - 1 : 0,
         .num_ref_idx_l1_active_minus1  = sh->nb_refs[L1] ? sh->nb_refs[L1] - 1 : 0,