avcodec/huffman: Use logcontext instead of AVCodecContext

Said AVCodecContext is only used for logging; it furthermore avoids
an avcodec.h inclusion.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/huffman.c

@@ -29,7 +29,6 @@
 #include "libavutil/qsort.h"
 #include "libavutil/common.h"
 
-#include "avcodec.h"
 #include "huffman.h"
 #include "vlc.h"
 
@@ -154,7 +153,7 @@ static int build_huff_tree(VLC *vlc, Node *nodes, int head, int flags, int nb_bi
  * nodes size must be 2*nb_codes
  * first nb_codes nodes.count must be set
  */
-int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes, int nb_bits,
+int ff_huff_build_tree(void *logctx, VLC *vlc, int nb_codes, int nb_bits,
                        Node *nodes, HuffCmp cmp, int flags)
 {
     int i, j;
@@ -168,7 +167,7 @@ int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes, int nb_bit
     }
 
     if (sum >> 31) {
-        av_log(avctx, AV_LOG_ERROR,
+        av_log(logctx, AV_LOG_ERROR,
                "Too high symbol frequencies. "
                "Tree construction is not possible\n");
         return -1;
@@ -193,7 +192,7 @@ int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes, int nb_bit
         cur_node++;
     }
     if (build_huff_tree(vlc, nodes, nb_codes * 2 - 2, flags, nb_bits) < 0) {
-        av_log(avctx, AV_LOG_ERROR, "Error building tree\n");
+        av_log(logctx, AV_LOG_ERROR, "Error building tree\n");
         return -1;
     }
     return 0;

libavcodec/huffman.h

@@ -26,7 +26,8 @@
 #ifndef AVCODEC_HUFFMAN_H
 #define AVCODEC_HUFFMAN_H
 
-#include "avcodec.h"
+#include <stdint.h>
+
 #include "vlc.h"
 
 typedef struct Node {
@@ -40,7 +41,7 @@ typedef struct Node {
 #define FF_HUFFMAN_BITS 10
 
 typedef int (*HuffCmp)(const void *va, const void *vb);
-int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes, int nb_bits,
+int ff_huff_build_tree(void *logctx, VLC *vlc, int nb_codes, int nb_bits,
                        Node *nodes, HuffCmp cmp, int flags);
 
 int ff_huff_gen_len_table(uint8_t *dst, const uint64_t *stats, int n, int skip0);