hevcdec: move decoder-independent declarations into a separate header

This way they can be reused by other code without including the whole
decoder-specific hevcdec.h
Also, add the HEVC_ prefix to them, since similarly named values exist
for H.264 as well and are sometimes used in the same code.

10 files changed, 180 insertions, 151 deletions

diff --git a/libavcodec/hevc.h b/libavcodec/hevc.h
new file mode 100644
index 0000000000..66816b8409
--- /dev/null
+++ b/libavcodec/hevc.h
@@ -0,0 +1,65 @@
+/*
+ * HEVC shared code
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_HEVC_H
+#define AVCODEC_HEVC_H
+
+/**
+ * Table 7-3: NAL unit type codes
+ */
+enum HEVCNALUnitType {
+    HEVC_NAL_TRAIL_N    = 0,
+    HEVC_NAL_TRAIL_R    = 1,
+    HEVC_NAL_TSA_N      = 2,
+    HEVC_NAL_TSA_R      = 3,
+    HEVC_NAL_STSA_N     = 4,
+    HEVC_NAL_STSA_R     = 5,
+    HEVC_NAL_RADL_N     = 6,
+    HEVC_NAL_RADL_R     = 7,
+    HEVC_NAL_RASL_N     = 8,
+    HEVC_NAL_RASL_R     = 9,
+    HEVC_NAL_BLA_W_LP   = 16,
+    HEVC_NAL_BLA_W_RADL = 17,
+    HEVC_NAL_BLA_N_LP   = 18,
+    HEVC_NAL_IDR_W_RADL = 19,
+    HEVC_NAL_IDR_N_LP   = 20,
+    HEVC_NAL_CRA_NUT    = 21,
+    HEVC_NAL_VPS        = 32,
+    HEVC_NAL_SPS        = 33,
+    HEVC_NAL_PPS        = 34,
+    HEVC_NAL_AUD        = 35,
+    HEVC_NAL_EOS_NUT    = 36,
+    HEVC_NAL_EOB_NUT    = 37,
+    HEVC_NAL_FD_NUT     = 38,
+    HEVC_NAL_SEI_PREFIX = 39,
+    HEVC_NAL_SEI_SUFFIX = 40,
+};
+
+/**
+ * 7.4.2.1
+ */
+#define HEVC_MAX_SUB_LAYERS 7
+#define HEVC_MAX_VPS_COUNT 16
+#define HEVC_MAX_SPS_COUNT 32
+#define HEVC_MAX_PPS_COUNT 256
+#define HEVC_MAX_SHORT_TERM_RPS_COUNT 64
+#define HEVC_MAX_CU_SIZE 128
+
+#endif /* AVCODEC_HEVC_H */
diff --git a/libavcodec/hevc_mp4toannexb_bsf.c b/libavcodec/hevc_mp4toannexb_bsf.c
index f364fbd161..d6b1f00047 100644
--- a/libavcodec/hevc_mp4toannexb_bsf.c
+++ b/libavcodec/hevc_mp4toannexb_bsf.c
@@ -27,7 +27,7 @@
 #include "avcodec.h"
 #include "bsf.h"
 #include "bytestream.h"
-#include "hevcdec.h"
+#include "hevc.h"
 
 #define MIN_HEVCC_LENGTH 23
 
@@ -55,8 +55,8 @@ static int hevc_extradata_to_annexb(AVBSFContext *ctx)
         int type = bytestream2_get_byte(&gb) & 0x3f;
         int cnt  = bytestream2_get_be16(&gb);
 
-        if (!(type == NAL_VPS || type == NAL_SPS || type == NAL_PPS ||
-              type == NAL_SEI_PREFIX || type == NAL_SEI_SUFFIX)) {
+        if (!(type == HEVC_NAL_VPS || type == HEVC_NAL_SPS || type == HEVC_NAL_PPS ||
+              type == HEVC_NAL_SEI_PREFIX || type == HEVC_NAL_SEI_SUFFIX)) {
             av_log(ctx, AV_LOG_ERROR, "Invalid NAL unit type in extradata: %d\n",
                    type);
             ret = AVERROR_INVALIDDATA;
diff --git a/libavcodec/hevc_parser.c b/libavcodec/hevc_parser.c
index b68ceb985e..49e712269b 100644
--- a/libavcodec/hevc_parser.c
+++ b/libavcodec/hevc_parser.c
@@ -23,6 +23,7 @@
 #include "libavutil/common.h"
 
 #include "golomb.h"
+#include "hevc.h"
 #include "hevcdec.h"
 #include "h2645_parse.h"
 #include "parser.h"
@@ -55,7 +56,7 @@ static int hevc_parse_slice_header(AVCodecParserContext *s, H2645NAL *nal,
         get_bits1(gb);      // no output of prior pics
 
     pps_id = get_ue_golomb_long(gb);
-    if (pps_id >= MAX_PPS_COUNT || !ctx->ps.pps_list[pps_id]) {
+    if (pps_id >= HEVC_MAX_PPS_COUNT || !ctx->ps.pps_list[pps_id]) {
         av_log(avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);
         return AVERROR_INVALIDDATA;
     }
@@ -92,25 +93,25 @@ static int parse_nal_units(AVCodecParserContext *s, const uint8_t *buf,
 
         /* ignore everything except parameter sets and VCL NALUs */
         switch (nal->type) {
-        case NAL_VPS: ff_hevc_decode_nal_vps(&nal->gb, avctx, &ctx->ps);    break;
-        case NAL_SPS: ff_hevc_decode_nal_sps(&nal->gb, avctx, &ctx->ps, 1); break;
-        case NAL_PPS: ff_hevc_decode_nal_pps(&nal->gb, avctx, &ctx->ps);    break;
-        case NAL_TRAIL_R:
-        case NAL_TRAIL_N:
-        case NAL_TSA_N:
-        case NAL_TSA_R:
-        case NAL_STSA_N:
-        case NAL_STSA_R:
-        case NAL_BLA_W_LP:
-        case NAL_BLA_W_RADL:
-        case NAL_BLA_N_LP:
-        case NAL_IDR_W_RADL:
-        case NAL_IDR_N_LP:
-        case NAL_CRA_NUT:
-        case NAL_RADL_N:
-        case NAL_RADL_R:
-        case NAL_RASL_N:
-        case NAL_RASL_R: hevc_parse_slice_header(s, nal, avctx); break;
+        case HEVC_NAL_VPS: ff_hevc_decode_nal_vps(&nal->gb, avctx, &ctx->ps);    break;
+        case HEVC_NAL_SPS: ff_hevc_decode_nal_sps(&nal->gb, avctx, &ctx->ps, 1); break;
+        case HEVC_NAL_PPS: ff_hevc_decode_nal_pps(&nal->gb, avctx, &ctx->ps);    break;
+        case HEVC_NAL_TRAIL_R:
+        case HEVC_NAL_TRAIL_N:
+        case HEVC_NAL_TSA_N:
+        case HEVC_NAL_TSA_R:
+        case HEVC_NAL_STSA_N:
+        case HEVC_NAL_STSA_R:
+        case HEVC_NAL_BLA_W_LP:
+        case HEVC_NAL_BLA_W_RADL:
+        case HEVC_NAL_BLA_N_LP:
+        case HEVC_NAL_IDR_W_RADL:
+        case HEVC_NAL_IDR_N_LP:
+        case HEVC_NAL_CRA_NUT:
+        case HEVC_NAL_RADL_N:
+        case HEVC_NAL_RADL_R:
+        case HEVC_NAL_RASL_N:
+        case HEVC_NAL_RASL_R: hevc_parse_slice_header(s, nal, avctx); break;
         }
     }
 
@@ -138,19 +139,19 @@ static int hevc_find_frame_end(AVCodecParserContext *s, const uint8_t *buf,
 
         nut = (pc->state64 >> 2 * 8 + 1) & 0x3F;
         // Beginning of access unit
-        if ((nut >= NAL_VPS && nut <= NAL_AUD) || nut == NAL_SEI_PREFIX ||
+        if ((nut >= HEVC_NAL_VPS && nut <= HEVC_NAL_AUD) || nut == HEVC_NAL_SEI_PREFIX ||
             (nut >= 41 && nut <= 44) || (nut >= 48 && nut <= 55)) {
             if (pc->frame_start_found) {
                 pc->frame_start_found = 0;
                 return i - 5;
             }
-        } else if (nut <= NAL_RASL_R ||
-                   (nut >= NAL_BLA_W_LP && nut <= NAL_CRA_NUT)) {
+        } else if (nut <= HEVC_NAL_RASL_R ||
+                   (nut >= HEVC_NAL_BLA_W_LP && nut <= HEVC_NAL_CRA_NUT)) {
             int first_slice_segment_in_pic_flag = buf[i] >> 7;
             if (first_slice_segment_in_pic_flag) {
                 if (!pc->frame_start_found) {
                     pc->frame_start_found = 1;
-                    s->key_frame = nut >= NAL_BLA_W_LP && nut <= NAL_CRA_NUT;
+                    s->key_frame = nut >= HEVC_NAL_BLA_W_LP && nut <= HEVC_NAL_CRA_NUT;
                 } else { // First slice of next frame found
                     pc->frame_start_found = 0;
                     return i - 5;
@@ -205,7 +206,7 @@ static int hevc_split(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
         state = (state << 8) | buf[i];
         if (((state >> 8) & 0xFFFFFF) == START_CODE) {
             int nut = (state >> 1) & 0x3F;
-            if (nut >= NAL_VPS && nut <= NAL_PPS)
+            if (nut >= HEVC_NAL_VPS && nut <= HEVC_NAL_PPS)
                 has_ps = 1;
             else if (has_ps)
                 return i - 3;
diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c
index b7b2ea9251..520017bc6e 100644
--- a/libavcodec/hevc_ps.c
+++ b/libavcodec/hevc_ps.c
@@ -370,7 +370,7 @@ int ff_hevc_decode_nal_vps(GetBitContext *gb, AVCodecContext *avctx,
     av_log(avctx, AV_LOG_DEBUG, "Decoding VPS\n");
 
     vps_id = get_bits(gb, 4);
-    if (vps_id >= MAX_VPS_COUNT) {
+    if (vps_id >= HEVC_MAX_VPS_COUNT) {
         av_log(avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", vps_id);
         goto err;
     }
@@ -389,7 +389,7 @@ int ff_hevc_decode_nal_vps(GetBitContext *gb, AVCodecContext *avctx,
         goto err;
     }
 
-    if (vps->vps_max_sub_layers > MAX_SUB_LAYERS) {
+    if (vps->vps_max_sub_layers > HEVC_MAX_SUB_LAYERS) {
         av_log(avctx, AV_LOG_ERROR, "vps_max_sub_layers out of range: %d\n",
                vps->vps_max_sub_layers);
         goto err;
@@ -690,7 +690,7 @@ int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id,
     // Coded parameters
 
     sps->vps_id = get_bits(gb, 4);
-    if (sps->vps_id >= MAX_VPS_COUNT) {
+    if (sps->vps_id >= HEVC_MAX_VPS_COUNT) {
         av_log(avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", sps->vps_id);
         ret = AVERROR_INVALIDDATA;
         goto err;
@@ -704,7 +704,7 @@ int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id,
     }
 
     sps->max_sub_layers = get_bits(gb, 3) + 1;
-    if (sps->max_sub_layers > MAX_SUB_LAYERS) {
+    if (sps->max_sub_layers > HEVC_MAX_SUB_LAYERS) {
         av_log(avctx, AV_LOG_ERROR, "sps_max_sub_layers out of range: %d\n",
                sps->max_sub_layers);
         ret = AVERROR_INVALIDDATA;
@@ -716,7 +716,7 @@ int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id,
     parse_ptl(gb, avctx, &sps->ptl, sps->max_sub_layers);
 
     *sps_id = get_ue_golomb_long(gb);
-    if (*sps_id >= MAX_SPS_COUNT) {
+    if (*sps_id >= HEVC_MAX_SPS_COUNT) {
         av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", *sps_id);
         ret = AVERROR_INVALIDDATA;
         goto err;
@@ -867,7 +867,7 @@ int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id,
     }
 
     sps->nb_st_rps = get_ue_golomb_long(gb);
-    if (sps->nb_st_rps > MAX_SHORT_TERM_RPS_COUNT) {
+    if (sps->nb_st_rps > HEVC_MAX_SHORT_TERM_RPS_COUNT) {
         av_log(avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",
                sps->nb_st_rps);
         ret = AVERROR_INVALIDDATA;
@@ -1205,13 +1205,13 @@ int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,
 
     // Coded parameters
     pps_id = get_ue_golomb_long(gb);
-    if (pps_id >= MAX_PPS_COUNT) {
+    if (pps_id >= HEVC_MAX_PPS_COUNT) {
         av_log(avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);
         ret = AVERROR_INVALIDDATA;
         goto err;
     }
     pps->sps_id = get_ue_golomb_long(gb);
-    if (pps->sps_id >= MAX_SPS_COUNT) {
+    if (pps->sps_id >= HEVC_MAX_SPS_COUNT) {
         av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);
         ret = AVERROR_INVALIDDATA;
         goto err;
diff --git a/libavcodec/hevc_refs.c b/libavcodec/hevc_refs.c
index 3e056da0a9..82a1157887 100644
--- a/libavcodec/hevc_refs.c
+++ b/libavcodec/hevc_refs.c
@@ -26,6 +26,7 @@
 
 #include "internal.h"
 #include "thread.h"
+#include "hevc.h"
 #include "hevcdec.h"
 
 void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags)
@@ -477,9 +478,9 @@ int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb)
         poc_msb = prev_poc_msb;
 
     // For BLA picture types, POCmsb is set to 0.
-    if (s->nal_unit_type == NAL_BLA_W_LP   ||
-        s->nal_unit_type == NAL_BLA_W_RADL ||
-        s->nal_unit_type == NAL_BLA_N_LP)
+    if (s->nal_unit_type == HEVC_NAL_BLA_W_LP   ||
+        s->nal_unit_type == HEVC_NAL_BLA_W_RADL ||
+        s->nal_unit_type == HEVC_NAL_BLA_N_LP)
         poc_msb = 0;
 
     return poc_msb + poc_lsb;
diff --git a/libavcodec/hevc_sei.c b/libavcodec/hevc_sei.c
index 37c80647d6..8865cecded 100644
--- a/libavcodec/hevc_sei.c
+++ b/libavcodec/hevc_sei.c
@@ -168,7 +168,7 @@ static int decode_nal_sei_message(HEVCContext *s)
         byte          = get_bits(gb, 8);
         payload_size += byte;
     }
-    if (s->nal_unit_type == NAL_SEI_PREFIX) {
+    if (s->nal_unit_type == HEVC_NAL_SEI_PREFIX) {
         return decode_nal_sei_prefix(s, payload_type, payload_size);
     } else { /* nal_unit_type == NAL_SEI_SUFFIX */
         return decode_nal_sei_suffix(s, payload_type, payload_size);
diff --git a/libavcodec/hevcdec.c b/libavcodec/hevcdec.c
index 2afd638723..1da43344a4 100644
--- a/libavcodec/hevcdec.c
+++ b/libavcodec/hevcdec.c
@@ -36,6 +36,7 @@
 #include "bytestream.h"
 #include "cabac_functions.h"
 #include "golomb.h"
+#include "hevc.h"
 #include "hevcdec.h"
 #include "profiles.h"
 
@@ -461,7 +462,7 @@ static int hls_slice_header(HEVCContext *s)
         sh->no_output_of_prior_pics_flag = get_bits1(gb);
 
     sh->pps_id = get_ue_golomb_long(gb);
-    if (sh->pps_id >= MAX_PPS_COUNT || !s->ps.pps_list[sh->pps_id]) {
+    if (sh->pps_id >= HEVC_MAX_PPS_COUNT || !s->ps.pps_list[sh->pps_id]) {
         av_log(s->avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", sh->pps_id);
         return AVERROR_INVALIDDATA;
     }
@@ -594,13 +595,13 @@ static int hls_slice_header(HEVCContext *s)
 
         /* 8.3.1 */
         if (s->temporal_id == 0 &&
-            s->nal_unit_type != NAL_TRAIL_N &&
-            s->nal_unit_type != NAL_TSA_N   &&
-            s->nal_unit_type != NAL_STSA_N  &&
-            s->nal_unit_type != NAL_RADL_N  &&
-            s->nal_unit_type != NAL_RADL_R  &&
-            s->nal_unit_type != NAL_RASL_N  &&
-            s->nal_unit_type != NAL_RASL_R)
+            s->nal_unit_type != HEVC_NAL_TRAIL_N &&
+            s->nal_unit_type != HEVC_NAL_TSA_N   &&
+            s->nal_unit_type != HEVC_NAL_STSA_N  &&
+            s->nal_unit_type != HEVC_NAL_RADL_N  &&
+            s->nal_unit_type != HEVC_NAL_RADL_R  &&
+            s->nal_unit_type != HEVC_NAL_RASL_N  &&
+            s->nal_unit_type != HEVC_NAL_RASL_R)
             s->pocTid0 = s->poc;
 
         if (s->ps.sps->sao_enabled) {
@@ -2455,50 +2456,50 @@ static int decode_nal_unit(HEVCContext *s, const H2645NAL *nal)
     s->temporal_id   = nal->temporal_id;
 
     switch (s->nal_unit_type) {
-    case NAL_VPS:
+    case HEVC_NAL_VPS:
         ret = ff_hevc_decode_nal_vps(gb, s->avctx, &s->ps);
         if (ret < 0)
             goto fail;
         break;
-    case NAL_SPS:
+    case HEVC_NAL_SPS:
         ret = ff_hevc_decode_nal_sps(gb, s->avctx, &s->ps,
                                      s->apply_defdispwin);
         if (ret < 0)
             goto fail;
         break;
-    case NAL_PPS:
+    case HEVC_NAL_PPS:
         ret = ff_hevc_decode_nal_pps(gb, s->avctx, &s->ps);
         if (ret < 0)
             goto fail;
         break;
-    case NAL_SEI_PREFIX:
-    case NAL_SEI_SUFFIX:
+    case HEVC_NAL_SEI_PREFIX:
+    case HEVC_NAL_SEI_SUFFIX:
         ret = ff_hevc_decode_nal_sei(s);
         if (ret < 0)
             goto fail;
         break;
-    case NAL_TRAIL_R:
-    case NAL_TRAIL_N:
-    case NAL_TSA_N:
-    case NAL_TSA_R:
-    case NAL_STSA_N:
-    case NAL_STSA_R:
-    case NAL_BLA_W_LP:
-    case NAL_BLA_W_RADL:
-    case NAL_BLA_N_LP:
-    case NAL_IDR_W_RADL:
-    case NAL_IDR_N_LP:
-    case NAL_CRA_NUT:
-    case NAL_RADL_N:
-    case NAL_RADL_R:
-    case NAL_RASL_N:
-    case NAL_RASL_R:
+    case HEVC_NAL_TRAIL_R:
+    case HEVC_NAL_TRAIL_N:
+    case HEVC_NAL_TSA_N:
+    case HEVC_NAL_TSA_R:
+    case HEVC_NAL_STSA_N:
+    case HEVC_NAL_STSA_R:
+    case HEVC_NAL_BLA_W_LP:
+    case HEVC_NAL_BLA_W_RADL:
+    case HEVC_NAL_BLA_N_LP:
+    case HEVC_NAL_IDR_W_RADL:
+    case HEVC_NAL_IDR_N_LP:
+    case HEVC_NAL_CRA_NUT:
+    case HEVC_NAL_RADL_N:
+    case HEVC_NAL_RADL_R:
+    case HEVC_NAL_RASL_N:
+    case HEVC_NAL_RASL_R:
         ret = hls_slice_header(s);
         if (ret < 0)
             return ret;
 
         if (s->max_ra == INT_MAX) {
-            if (s->nal_unit_type == NAL_CRA_NUT || IS_BLA(s)) {
+            if (s->nal_unit_type == HEVC_NAL_CRA_NUT || IS_BLA(s)) {
                 s->max_ra = s->poc;
             } else {
                 if (IS_IDR(s))
@@ -2506,12 +2507,12 @@ static int decode_nal_unit(HEVCContext *s, const H2645NAL *nal)
             }
         }
 
-        if ((s->nal_unit_type == NAL_RASL_R || s->nal_unit_type == NAL_RASL_N) &&
+        if ((s->nal_unit_type == HEVC_NAL_RASL_R || s->nal_unit_type == HEVC_NAL_RASL_N) &&
             s->poc <= s->max_ra) {
             s->is_decoded = 0;
             break;
         } else {
-            if (s->nal_unit_type == NAL_RASL_R && s->poc > s->max_ra)
+            if (s->nal_unit_type == HEVC_NAL_RASL_R && s->poc > s->max_ra)
                 s->max_ra = INT_MIN;
         }
 
@@ -2567,13 +2568,13 @@ static int decode_nal_unit(HEVCContext *s, const H2645NAL *nal)
             }
         }
         break;
-    case NAL_EOS_NUT:
-    case NAL_EOB_NUT:
+    case HEVC_NAL_EOS_NUT:
+    case HEVC_NAL_EOB_NUT:
         s->seq_decode = (s->seq_decode + 1) & 0xff;
         s->max_ra     = INT_MAX;
         break;
-    case NAL_AUD:
-    case NAL_FD_NUT:
+    case HEVC_NAL_AUD:
+    case HEVC_NAL_FD_NUT:
         break;
     default:
         av_log(s->avctx, AV_LOG_INFO,
@@ -2605,8 +2606,8 @@ static int decode_nal_units(HEVCContext *s, const uint8_t *buf, int length)
     }
 
     for (i = 0; i < s->pkt.nb_nals; i++) {
-        if (s->pkt.nals[i].type == NAL_EOB_NUT ||
-            s->pkt.nals[i].type == NAL_EOS_NUT)
+        if (s->pkt.nals[i].type == HEVC_NAL_EOB_NUT ||
+            s->pkt.nals[i].type == HEVC_NAL_EOS_NUT)
             s->eos = 1;
     }
 
diff --git a/libavcodec/hevcdec.h b/libavcodec/hevcdec.h
index ba261e6fec..df81e55ed8 100644
--- a/libavcodec/hevcdec.h
+++ b/libavcodec/hevcdec.h
@@ -34,6 +34,7 @@
 #include "cabac.h"
 #include "get_bits.h"
 #include "h2645_parse.h"
+#include "hevc.h"
 #include "hevcdsp.h"
 #include "internal.h"
 #include "thread.h"
@@ -42,16 +43,6 @@
 #define MAX_DPB_SIZE 16 // A.4.1
 #define MAX_REFS 16
 
-/**
- * 7.4.2.1
- */
-#define MAX_SUB_LAYERS 7
-#define MAX_VPS_COUNT 16
-#define MAX_SPS_COUNT 32
-#define MAX_PPS_COUNT 256
-#define MAX_SHORT_TERM_RPS_COUNT 64
-#define MAX_CU_SIZE 128
-
 //TODO: check if this is really the maximum
 #define MAX_TRANSFORM_DEPTH 5
 
@@ -80,45 +71,14 @@
 #define SAMPLE(tab, x, y) ((tab)[(y) * s->sps->width + (x)])
 #define SAMPLE_CTB(tab, x, y) ((tab)[(y) * min_cb_width + (x)])
 
-#define IS_IDR(s) (s->nal_unit_type == NAL_IDR_W_RADL || s->nal_unit_type == NAL_IDR_N_LP)
-#define IS_BLA(s) (s->nal_unit_type == NAL_BLA_W_RADL || s->nal_unit_type == NAL_BLA_W_LP || \
-                   s->nal_unit_type == NAL_BLA_N_LP)
+#define IS_IDR(s) (s->nal_unit_type == HEVC_NAL_IDR_W_RADL || s->nal_unit_type == HEVC_NAL_IDR_N_LP)
+#define IS_BLA(s) (s->nal_unit_type == HEVC_NAL_BLA_W_RADL || s->nal_unit_type == HEVC_NAL_BLA_W_LP || \
+                   s->nal_unit_type == HEVC_NAL_BLA_N_LP)
 #define IS_IRAP(s) (s->nal_unit_type >= 16 && s->nal_unit_type <= 23)
 
 #define FFUDIV(a,b) (((a) > 0 ? (a) : (a) - (b) + 1) / (b))
 #define FFUMOD(a,b) ((a) - (b) * FFUDIV(a,b))
 
-/**
- * Table 7-3: NAL unit type codes
- */
-enum NALUnitType {
-    NAL_TRAIL_N    = 0,
-    NAL_TRAIL_R    = 1,
-    NAL_TSA_N      = 2,
-    NAL_TSA_R      = 3,
-    NAL_STSA_N     = 4,
-    NAL_STSA_R     = 5,
-    NAL_RADL_N     = 6,
-    NAL_RADL_R     = 7,
-    NAL_RASL_N     = 8,
-    NAL_RASL_R     = 9,
-    NAL_BLA_W_LP   = 16,
-    NAL_BLA_W_RADL = 17,
-    NAL_BLA_N_LP   = 18,
-    NAL_IDR_W_RADL = 19,
-    NAL_IDR_N_LP   = 20,
-    NAL_CRA_NUT    = 21,
-    NAL_VPS        = 32,
-    NAL_SPS        = 33,
-    NAL_PPS        = 34,
-    NAL_AUD        = 35,
-    NAL_EOS_NUT    = 36,
-    NAL_EOB_NUT    = 37,
-    NAL_FD_NUT     = 38,
-    NAL_SEI_PREFIX = 39,
-    NAL_SEI_SUFFIX = 40,
-};
-
 enum RPSType {
     ST_CURR_BEF = 0,
     ST_CURR_AFT,
@@ -349,10 +309,10 @@ typedef struct PTLCommon {
 
 typedef struct PTL {
     PTLCommon general_ptl;
-    PTLCommon sub_layer_ptl[MAX_SUB_LAYERS];
+    PTLCommon sub_layer_ptl[HEVC_MAX_SUB_LAYERS];
 
-    uint8_t sub_layer_profile_present_flag[MAX_SUB_LAYERS];
-    uint8_t sub_layer_level_present_flag[MAX_SUB_LAYERS];
+    uint8_t sub_layer_profile_present_flag[HEVC_MAX_SUB_LAYERS];
+    uint8_t sub_layer_level_present_flag[HEVC_MAX_SUB_LAYERS];
 } PTL;
 
 typedef struct HEVCVPS {
@@ -362,9 +322,9 @@ typedef struct HEVCVPS {
 
     PTL ptl;
     int vps_sub_layer_ordering_info_present_flag;
-    unsigned int vps_max_dec_pic_buffering[MAX_SUB_LAYERS];
-    unsigned int vps_num_reorder_pics[MAX_SUB_LAYERS];
-    unsigned int vps_max_latency_increase[MAX_SUB_LAYERS];
+    unsigned int vps_max_dec_pic_buffering[HEVC_MAX_SUB_LAYERS];
+    unsigned int vps_num_reorder_pics[HEVC_MAX_SUB_LAYERS];
+    unsigned int vps_max_latency_increase[HEVC_MAX_SUB_LAYERS];
     int vps_max_layer_id;
     int vps_num_layer_sets; ///< vps_num_layer_sets_minus1 + 1
     uint8_t vps_timing_info_present_flag;
@@ -405,7 +365,7 @@ typedef struct HEVCSPS {
         int max_dec_pic_buffering;
         int num_reorder_pics;
         int max_latency_increase;
-    } temporal_layer[MAX_SUB_LAYERS];
+    } temporal_layer[HEVC_MAX_SUB_LAYERS];
 
     VUI vui;
     PTL ptl;
@@ -414,7 +374,7 @@ typedef struct HEVCSPS {
     ScalingList scaling_list;
 
     unsigned int nb_st_rps;
-    ShortTermRPS st_rps[MAX_SHORT_TERM_RPS_COUNT];
+    ShortTermRPS st_rps[HEVC_MAX_SHORT_TERM_RPS_COUNT];
 
     uint8_t amp_enabled_flag;
     uint8_t sao_enabled;
@@ -528,9 +488,9 @@ typedef struct HEVCPPS {
 } HEVCPPS;
 
 typedef struct HEVCParamSets {
-    AVBufferRef *vps_list[MAX_VPS_COUNT];
-    AVBufferRef *sps_list[MAX_SPS_COUNT];
-    AVBufferRef *pps_list[MAX_PPS_COUNT];
+    AVBufferRef *vps_list[HEVC_MAX_VPS_COUNT];
+    AVBufferRef *sps_list[HEVC_MAX_SPS_COUNT];
+    AVBufferRef *pps_list[HEVC_MAX_PPS_COUNT];
 
     /* currently active parameter sets */
     const HEVCVPS *vps;
@@ -783,7 +743,7 @@ typedef struct HEVCContext {
     SliceHeader sh;
     SAOParams *sao;
     DBParams *deblock;
-    enum NALUnitType nal_unit_type;
+    enum HEVCNALUnitType nal_unit_type;
     int temporal_id;  ///< temporal_id_plus1 - 1
     HEVCFrame *ref;
     HEVCFrame DPB[32];
@@ -832,7 +792,7 @@ typedef struct HEVCContext {
 
     H2645Packet pkt;
     // type of the first VCL NAL of the current frame
-    enum NALUnitType first_nal_type;
+    enum HEVCNALUnitType first_nal_type;
 
     // for checking the frame checksums
     struct AVMD5 *md5_ctx;
diff --git a/libavcodec/qsvenc_hevc.c b/libavcodec/qsvenc_hevc.c
index 24af82c8c5..c51309f9c6 100644
--- a/libavcodec/qsvenc_hevc.c
+++ b/libavcodec/qsvenc_hevc.c
@@ -30,6 +30,7 @@
 #include "avcodec.h"
 #include "bytestream.h"
 #include "get_bits.h"
+#include "hevc.h"
 #include "hevcdec.h"
 #include "h2645_parse.h"
 #include "internal.h"
@@ -83,7 +84,7 @@ static int generate_fake_vps(QSVEncContext *q, AVCodecContext *avctx)
 
     get_bits(&gb, 1);
     type = get_bits(&gb, 6);
-    if (type != NAL_SPS) {
+    if (type != HEVC_NAL_SPS) {
         av_log(avctx, AV_LOG_ERROR, "Unexpected NAL type in the extradata: %d\n",
                type);
         av_freep(&sps_nal.rbsp_buffer);
@@ -103,7 +104,7 @@ static int generate_fake_vps(QSVEncContext *q, AVCodecContext *avctx)
     vps.vps_max_sub_layers = sps.max_sub_layers;
     memcpy(&vps.ptl, &sps.ptl, sizeof(vps.ptl));
     vps.vps_sub_layer_ordering_info_present_flag = 1;
-    for (i = 0; i < MAX_SUB_LAYERS; i++) {
+    for (i = 0; i < HEVC_MAX_SUB_LAYERS; i++) {
         vps.vps_max_dec_pic_buffering[i] = sps.temporal_layer[i].max_dec_pic_buffering;
         vps.vps_num_reorder_pics[i]      = sps.temporal_layer[i].num_reorder_pics;
         vps.vps_max_latency_increase[i]  = sps.temporal_layer[i].max_latency_increase;
@@ -127,9 +128,9 @@ static int generate_fake_vps(QSVEncContext *q, AVCodecContext *avctx)
     bytestream2_init(&gbc, vps_rbsp_buf, ret);
     bytestream2_init_writer(&pbc, vps_buf, sizeof(vps_buf));
 
-    bytestream2_put_be32(&pbc, 1);              // startcode
-    bytestream2_put_byte(&pbc, NAL_VPS << 1);   // NAL
-    bytestream2_put_byte(&pbc, 1);              // header
+    bytestream2_put_be32(&pbc, 1);                 // startcode
+    bytestream2_put_byte(&pbc, HEVC_NAL_VPS << 1); // NAL
+    bytestream2_put_byte(&pbc, 1);                 // header
 
     while (bytestream2_get_bytes_left(&gbc)) {
         uint32_t b = bytestream2_peek_be24(&gbc);
diff --git a/libavcodec/vaapi_encode_h265.c b/libavcodec/vaapi_encode_h265.c
index 4853a5bbeb..776c228dd8 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"
@@ -275,7 +275,7 @@ static void vaapi_encode_h265_write_vps(PutBitContext *pbc,
     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
     int i, j;
 
-    vaapi_encode_h265_write_nal_unit_header(pbc, NAL_VPS);
+    vaapi_encode_h265_write_nal_unit_header(pbc, HEVC_NAL_VPS);
 
     u(4, mseq->video_parameter_set_id, vps_video_parameter_set_id);
 
@@ -395,7 +395,7 @@ static void vaapi_encode_h265_write_sps(PutBitContext *pbc,
     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
     int i;
 
-    vaapi_encode_h265_write_nal_unit_header(pbc, NAL_SPS);
+    vaapi_encode_h265_write_nal_unit_header(pbc, HEVC_NAL_SPS);
 
     u(4, mseq->video_parameter_set_id, sps_video_parameter_set_id);
 
@@ -491,7 +491,7 @@ static void vaapi_encode_h265_write_pps(PutBitContext *pbc,
     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;
     int i;
 
-    vaapi_encode_h265_write_nal_unit_header(pbc, NAL_PPS);
+    vaapi_encode_h265_write_nal_unit_header(pbc, HEVC_NAL_PPS);
 
     ue(vpic->slice_pic_parameter_set_id, pps_pic_parameter_set_id);
     ue(mseq->seq_parameter_set_id, pps_seq_parameter_set_id);
@@ -576,7 +576,7 @@ static void vaapi_encode_h265_write_slice_header2(PutBitContext *pbc,
     vaapi_encode_h265_write_nal_unit_header(pbc, vpic->nal_unit_type);
 
     u(1, mslice_var(first_slice_segment_in_pic_flag));
-    if (vpic->nal_unit_type >= NAL_BLA_W_LP &&
+    if (vpic->nal_unit_type >= HEVC_NAL_BLA_W_LP &&
        vpic->nal_unit_type <= 23)
         u(1, mslice_var(no_output_of_prior_pics_flag));
 
@@ -597,8 +597,8 @@ static void vaapi_encode_h265_write_slice_header2(PutBitContext *pbc,
             u(1, 1, pic_output_flag);
         if (vseq->seq_fields.bits.separate_colour_plane_flag)
             u(2, vslice_field(colour_plane_id));
-        if (vpic->nal_unit_type != NAL_IDR_W_RADL &&
-           vpic->nal_unit_type != NAL_IDR_N_LP) {
+        if (vpic->nal_unit_type != HEVC_NAL_IDR_W_RADL &&
+           vpic->nal_unit_type != HEVC_NAL_IDR_N_LP) {
             u(4 + mseq->log2_max_pic_order_cnt_lsb_minus4,
               (pslice->pic_order_cnt &
                ((1 << (mseq->log2_max_pic_order_cnt_lsb_minus4 + 4)) - 1)),
@@ -998,25 +998,25 @@ static int vaapi_encode_h265_init_picture_params(AVCodecContext *avctx,
 
     switch (pic->type) {
     case PICTURE_TYPE_IDR:
-        vpic->nal_unit_type = NAL_IDR_W_RADL;
+        vpic->nal_unit_type = HEVC_NAL_IDR_W_RADL;
         vpic->pic_fields.bits.idr_pic_flag = 1;
         vpic->pic_fields.bits.coding_type  = 1;
         vpic->pic_fields.bits.reference_pic_flag = 1;
         break;
     case PICTURE_TYPE_I:
-        vpic->nal_unit_type = NAL_TRAIL_R;
+        vpic->nal_unit_type = HEVC_NAL_TRAIL_R;
         vpic->pic_fields.bits.idr_pic_flag = 0;
         vpic->pic_fields.bits.coding_type  = 1;
         vpic->pic_fields.bits.reference_pic_flag = 1;
         break;
     case PICTURE_TYPE_P:
-        vpic->nal_unit_type = NAL_TRAIL_R;
+        vpic->nal_unit_type = HEVC_NAL_TRAIL_R;
         vpic->pic_fields.bits.idr_pic_flag = 0;
         vpic->pic_fields.bits.coding_type  = 2;
         vpic->pic_fields.bits.reference_pic_flag = 1;
         break;
     case PICTURE_TYPE_B:
-        vpic->nal_unit_type = NAL_TRAIL_R;
+        vpic->nal_unit_type = HEVC_NAL_TRAIL_R;
         vpic->pic_fields.bits.idr_pic_flag = 0;
         vpic->pic_fields.bits.coding_type  = 3;
         vpic->pic_fields.bits.reference_pic_flag = 0;