diff --git a/libavcodec/huffman.c b/libavcodec/huffman.c
index d41dabbe5d..f21a4f890f 100644
--- a/libavcodec/huffman.c
+++ b/libavcodec/huffman.c
@@ -67,7 +67,7 @@ static int build_huff_tree(VLC *vlc, Node *nodes, int head, int flags)
  * first nb_codes nodes.count must be set
  */
 int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes,
-                       Node *nodes, huff_cmp_t cmp, int flags)
+                       Node *nodes, HuffCmp cmp, int flags)
 {
     int i, j;
     int cur_node;
diff --git a/libavcodec/huffman.h b/libavcodec/huffman.h
index 0b11af8b45..bfb772334a 100644
--- a/libavcodec/huffman.h
+++ b/libavcodec/huffman.h
@@ -35,8 +35,8 @@ typedef struct {
 #define FF_HUFFMAN_FLAG_HNODE_FIRST 0x01
 #define FF_HUFFMAN_FLAG_ZERO_COUNT  0x02
 
-typedef int (*huff_cmp_t)(const void *va, const void *vb);
+typedef int (*HuffCmp)(const void *va, const void *vb);
 int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes,
-                       Node *nodes, huff_cmp_t cmp, int flags);
+                       Node *nodes, HuffCmp cmp, int flags);
 
 #endif /* AVCODEC_HUFFMAN_H */
diff --git a/libavcodec/vp5.c b/libavcodec/vp5.c
index 4f9d42f446..61155b4789 100644
--- a/libavcodec/vp5.c
+++ b/libavcodec/vp5.c
@@ -33,10 +33,10 @@
 #include "vp5data.h"
 
 
-static int vp5_parse_header(vp56_context_t *s, const uint8_t *buf, int buf_size,
+static int vp5_parse_header(VP56Context *s, const uint8_t *buf, int buf_size,
                             int *golden_frame)
 {
-    vp56_range_coder_t *c = &s->c;
+    VP56RangeCoder *c = &s->c;
     int rows, cols;
 
     vp56_init_range_decoder(&s->c, buf, buf_size);
@@ -84,10 +84,10 @@ static int vp5_adjust(int v, int t)
     return v;
 }
 
-static void vp5_parse_vector_adjustment(vp56_context_t *s, vp56_mv_t *vect)
+static void vp5_parse_vector_adjustment(VP56Context *s, VP56mv *vect)
 {
-    vp56_range_coder_t *c = &s->c;
-    vp56_model_t *model = s->modelp;
+    VP56RangeCoder *c = &s->c;
+    Vp56Model *model = s->modelp;
     int comp, di;
 
     for (comp=0; comp<2; comp++) {
@@ -108,10 +108,10 @@ static void vp5_parse_vector_adjustment(vp56_context_t *s, vp56_mv_t *vect)
     }
 }
 
-static void vp5_parse_vector_models(vp56_context_t *s)
+static void vp5_parse_vector_models(VP56Context *s)
 {
-    vp56_range_coder_t *c = &s->c;
-    vp56_model_t *model = s->modelp;
+    VP56RangeCoder *c = &s->c;
+    Vp56Model *model = s->modelp;
     int comp, node;
 
     for (comp=0; comp<2; comp++) {
@@ -131,10 +131,10 @@ static void vp5_parse_vector_models(vp56_context_t *s)
                 model->vector_pdv[comp][node] = vp56_rac_gets_nn(c, 7);
 }
 
-static void vp5_parse_coeff_models(vp56_context_t *s)
+static void vp5_parse_coeff_models(VP56Context *s)
 {
-    vp56_range_coder_t *c = &s->c;
-    vp56_model_t *model = s->modelp;
+    VP56RangeCoder *c = &s->c;
+    Vp56Model *model = s->modelp;
     uint8_t def_prob[11];
     int node, cg, ctx;
     int ct;    /* code type */
@@ -177,10 +177,10 @@ static void vp5_parse_coeff_models(vp56_context_t *s)
                         model->coeff_acct[pt][ct][cg][ctx][node] = av_clip(((model->coeff_ract[pt][ct][cg][node] * vp5_ract_lc[ct][cg][node][ctx][0] + 128) >> 8) + vp5_ract_lc[ct][cg][node][ctx][1], 1, 254);
 }
 
-static void vp5_parse_coeff(vp56_context_t *s)
+static void vp5_parse_coeff(VP56Context *s)
 {
-    vp56_range_coder_t *c = &s->c;
-    vp56_model_t *model = s->modelp;
+    VP56RangeCoder *c = &s->c;
+    Vp56Model *model = s->modelp;
     uint8_t *permute = s->scantable.permutated;
     uint8_t *model1, *model2;
     int coeff, sign, coeff_idx;
@@ -250,9 +250,9 @@ static void vp5_parse_coeff(vp56_context_t *s)
     }
 }
 
-static void vp5_default_models_init(vp56_context_t *s)
+static void vp5_default_models_init(VP56Context *s)
 {
-    vp56_model_t *model = s->modelp;
+    Vp56Model *model = s->modelp;
     int i;
 
     for (i=0; i<2; i++) {
@@ -267,7 +267,7 @@ static void vp5_default_models_init(vp56_context_t *s)
 
 static av_cold int vp5_decode_init(AVCodecContext *avctx)
 {
-    vp56_context_t *s = avctx->priv_data;
+    VP56Context *s = avctx->priv_data;
 
     vp56_init(avctx, 1, 0);
     s->vp56_coord_div = vp5_coord_div;
@@ -286,7 +286,7 @@ AVCodec vp5_decoder = {
     "vp5",
     CODEC_TYPE_VIDEO,
     CODEC_ID_VP5,
-    sizeof(vp56_context_t),
+    sizeof(VP56Context),
     vp5_decode_init,
     NULL,
     vp56_free,
diff --git a/libavcodec/vp56.c b/libavcodec/vp56.c
index 30306c42a2..1ebb54af59 100644
--- a/libavcodec/vp56.c
+++ b/libavcodec/vp56.c
@@ -28,20 +28,20 @@
 #include "vp56data.h"
 
 
-void vp56_init_dequant(vp56_context_t *s, int quantizer)
+void vp56_init_dequant(VP56Context *s, int quantizer)
 {
     s->quantizer = quantizer;
     s->dequant_dc = vp56_dc_dequant[quantizer] << 2;
     s->dequant_ac = vp56_ac_dequant[quantizer] << 2;
 }
 
-static int vp56_get_vectors_predictors(vp56_context_t *s, int row, int col,
-                                       vp56_frame_t ref_frame)
+static int vp56_get_vectors_predictors(VP56Context *s, int row, int col,
+                                       VP56Frame ref_frame)
 {
     int nb_pred = 0;
-    vp56_mv_t vect[2] = {{0,0}, {0,0}};
+    VP56mv vect[2] = {{0,0}, {0,0}};
     int pos, offset;
-    vp56_mv_t mvp;
+    VP56mv mvp;
 
     for (pos=0; pos<12; pos++) {
         mvp.x = col + vp56_candidate_predictor_pos[pos][0];
@@ -73,10 +73,10 @@ static int vp56_get_vectors_predictors(vp56_context_t *s, int row, int col,
     return nb_pred+1;
 }
 
-static void vp56_parse_mb_type_models(vp56_context_t *s)
+static void vp56_parse_mb_type_models(VP56Context *s)
 {
-    vp56_range_coder_t *c = &s->c;
-    vp56_model_t *model = s->modelp;
+    VP56RangeCoder *c = &s->c;
+    Vp56Model *model = s->modelp;
     int i, ctx, type;
 
     for (ctx=0; ctx<3; ctx++) {
@@ -144,11 +144,11 @@ static void vp56_parse_mb_type_models(vp56_context_t *s)
     }
 }
 
-static vp56_mb_t vp56_parse_mb_type(vp56_context_t *s,
-                                    vp56_mb_t prev_type, int ctx)
+static VP56mb vp56_parse_mb_type(VP56Context *s,
+                                    VP56mb prev_type, int ctx)
 {
     uint8_t *mb_type_model = s->modelp->mb_type[ctx][prev_type];
-    vp56_range_coder_t *c = &s->c;
+    VP56RangeCoder *c = &s->c;
 
     if (vp56_rac_get_prob(c, mb_type_model[0]))
         return prev_type;
@@ -156,9 +156,9 @@ static vp56_mb_t vp56_parse_mb_type(vp56_context_t *s,
         return vp56_rac_get_tree(c, vp56_pmbt_tree, mb_type_model);
 }
 
-static void vp56_decode_4mv(vp56_context_t *s, int row, int col)
+static void vp56_decode_4mv(VP56Context *s, int row, int col)
 {
-    vp56_mv_t mv = {0,0};
+    VP56mv mv = {0,0};
     int type[4];
     int b;
 
@@ -173,7 +173,7 @@ static void vp56_decode_4mv(vp56_context_t *s, int row, int col)
     for (b=0; b<4; b++) {
         switch (type[b]) {
             case VP56_MB_INTER_NOVEC_PF:
-                s->mv[b] = (vp56_mv_t) {0,0};
+                s->mv[b] = (VP56mv) {0,0};
                 break;
             case VP56_MB_INTER_DELTA_PF:
                 s->parse_vector_adjustment(s, &s->mv[b]);
@@ -197,13 +197,13 @@ static void vp56_decode_4mv(vp56_context_t *s, int row, int col)
         s->mv[4].x = s->mv[5].x = RSHIFT(mv.x,2);
         s->mv[4].y = s->mv[5].y = RSHIFT(mv.y,2);
     } else {
-        s->mv[4] = s->mv[5] = (vp56_mv_t) {mv.x/4, mv.y/4};
+        s->mv[4] = s->mv[5] = (VP56mv) {mv.x/4, mv.y/4};
     }
 }
 
-static vp56_mb_t vp56_decode_mv(vp56_context_t *s, int row, int col)
+static VP56mb vp56_decode_mv(VP56Context *s, int row, int col)
 {
-    vp56_mv_t *mv, vect = {0,0};
+    VP56mv *mv, vect = {0,0};
     int ctx, b;
 
     ctx = vp56_get_vectors_predictors(s, row, col, VP56_FRAME_PREVIOUS);
@@ -258,14 +258,14 @@ static vp56_mb_t vp56_decode_mv(vp56_context_t *s, int row, int col)
     return s->mb_type;
 }
 
-static void vp56_add_predictors_dc(vp56_context_t *s, vp56_frame_t ref_frame)
+static void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame)
 {
     int idx = s->scantable.permutated[0];
     int b;
 
     for (b=0; b<6; b++) {
-        vp56_ref_dc_t *ab = &s->above_blocks[s->above_block_idx[b]];
-        vp56_ref_dc_t *lb = &s->left_block[vp56_b6to4[b]];
+        VP56RefDc *ab = &s->above_blocks[s->above_block_idx[b]];
+        VP56RefDc *lb = &s->left_block[vp56_b6to4[b]];
         int count = 0;
         int dc = 0;
         int i;
@@ -299,7 +299,7 @@ static void vp56_add_predictors_dc(vp56_context_t *s, vp56_frame_t ref_frame)
     }
 }
 
-static void vp56_edge_filter(vp56_context_t *s, uint8_t *yuv,
+static void vp56_edge_filter(VP56Context *s, uint8_t *yuv,
                              int pix_inc, int line_inc, int t)
 {
     int pix2_inc = 2 * pix_inc;
@@ -314,7 +314,7 @@ static void vp56_edge_filter(vp56_context_t *s, uint8_t *yuv,
     }
 }
 
-static void vp56_deblock_filter(vp56_context_t *s, uint8_t *yuv,
+static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv,
                                 int stride, int dx, int dy)
 {
     int t = vp56_filter_threshold[s->quantizer];
@@ -322,7 +322,7 @@ static void vp56_deblock_filter(vp56_context_t *s, uint8_t *yuv,
     if (dy)  vp56_edge_filter(s, yuv + stride*(10-dy), stride,      1, t);
 }
 
-static void vp56_mc(vp56_context_t *s, int b, int plane, uint8_t *src,
+static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src,
                     int stride, int x, int y)
 {
     uint8_t *dst=s->framep[VP56_FRAME_CURRENT]->data[plane]+s->block_offset[b];
@@ -392,11 +392,11 @@ static void vp56_mc(vp56_context_t *s, int b, int plane, uint8_t *src,
     }
 }
 
-static void vp56_decode_mb(vp56_context_t *s, int row, int col, int is_alpha)
+static void vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha)
 {
     AVFrame *frame_current, *frame_ref;
-    vp56_mb_t mb_type;
-    vp56_frame_t ref_frame;
+    VP56mb mb_type;
+    VP56Frame ref_frame;
     int b, ab, b_max, plane, off;
 
     if (s->framep[VP56_FRAME_CURRENT]->key_frame)
@@ -461,7 +461,7 @@ static void vp56_decode_mb(vp56_context_t *s, int row, int col, int is_alpha)
 
 static int vp56_size_changed(AVCodecContext *avctx)
 {
-    vp56_context_t *s = avctx->priv_data;
+    VP56Context *s = avctx->priv_data;
     int stride = s->framep[VP56_FRAME_CURRENT]->linesize[0];
     int i;
 
@@ -497,7 +497,7 @@ static int vp56_size_changed(AVCodecContext *avctx)
 int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
                       const uint8_t *buf, int buf_size)
 {
-    vp56_context_t *s = avctx->priv_data;
+    VP56Context *s = avctx->priv_data;
     AVFrame *const p = s->framep[VP56_FRAME_CURRENT];
     int remaining_buf_size = buf_size;
     int is_alpha, alpha_offset;
@@ -646,7 +646,7 @@ int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
 
 av_cold void vp56_init(AVCodecContext *avctx, int flip, int has_alpha)
 {
-    vp56_context_t *s = avctx->priv_data;
+    VP56Context *s = avctx->priv_data;
     int i;
 
     s->avctx = avctx;
@@ -686,7 +686,7 @@ av_cold void vp56_init(AVCodecContext *avctx, int flip, int has_alpha)
 
 av_cold int vp56_free(AVCodecContext *avctx)
 {
-    vp56_context_t *s = avctx->priv_data;
+    VP56Context *s = avctx->priv_data;
 
     av_free(s->above_blocks);
     av_free(s->macroblocks);
diff --git a/libavcodec/vp56.h b/libavcodec/vp56.h
index 991e94b554..0c352e8175 100644
--- a/libavcodec/vp56.h
+++ b/libavcodec/vp56.h
@@ -30,20 +30,20 @@
 #include "bytestream.h"
 
 
-typedef struct vp56_context vp56_context_t;
-typedef struct vp56_mv vp56_mv_t;
+typedef struct vp56_context VP56Context;
+typedef struct vp56_mv VP56mv;
 
-typedef void (*vp56_parse_vector_adjustment_t)(vp56_context_t *s,
-                                               vp56_mv_t *vect);
-typedef int (*vp56_adjust_t)(int v, int t);
-typedef void (*vp56_filter_t)(vp56_context_t *s, uint8_t *dst, uint8_t *src,
+typedef void (*VP56ParseVectorAdjustment)(VP56Context *s,
+                                               VP56mv *vect);
+typedef int (*VP56Adjust)(int v, int t);
+typedef void (*VP56Filter)(VP56Context *s, uint8_t *dst, uint8_t *src,
                               int offset1, int offset2, int stride,
-                              vp56_mv_t mv, int mask, int select, int luma);
-typedef void (*vp56_parse_coeff_t)(vp56_context_t *s);
-typedef void (*vp56_default_models_init_t)(vp56_context_t *s);
-typedef void (*vp56_parse_vector_models_t)(vp56_context_t *s);
-typedef void (*vp56_parse_coeff_models_t)(vp56_context_t *s);
-typedef int (*vp56_parse_header_t)(vp56_context_t *s, const uint8_t *buf,
+                              VP56mv mv, int mask, int select, int luma);
+typedef void (*VP56ParseCoeff)(VP56Context *s);
+typedef void (*VP56DefaultModelsInit)(VP56Context *s);
+typedef void (*VP56ParseVectorModels)(VP56Context *s);
+typedef void (*VP56ParseCoeffModels)(VP56Context *s);
+typedef int (*VP56ParseHeader)(VP56Context *s, const uint8_t *buf,
                                    int buf_size, int *golden_frame);
 
 typedef struct {
@@ -51,13 +51,13 @@ typedef struct {
     int bits;
     const uint8_t *buffer;
     unsigned long code_word;
-} vp56_range_coder_t;
+} VP56RangeCoder;
 
 typedef struct {
     uint8_t not_null_dc;
-    vp56_frame_t ref_frame;
+    VP56Frame ref_frame;
     DCTELEM dc_coeff;
-} vp56_ref_dc_t;
+} VP56RefDc;
 
 struct vp56_mv {
     int x;
@@ -66,8 +66,8 @@ struct vp56_mv {
 
 typedef struct {
     uint8_t type;
-    vp56_mv_t mv;
-} vp56_macroblock_t;
+    VP56mv mv;
+} VP56Macroblock;
 
 typedef struct {
     uint8_t coeff_reorder[64];       /* used in vp6 only */
@@ -84,7 +84,7 @@ typedef struct {
     uint8_t coeff_runv[2][14];       /* run value (vp6 only) */
     uint8_t mb_type[3][10][10];      /* model for decoding MB type */
     uint8_t mb_types_stats[3][10][2];/* contextual, next MB type stats */
-} vp56_model_t;
+} Vp56Model;
 
 struct vp56_context {
     AVCodecContext *avctx;
@@ -94,9 +94,9 @@ struct vp56_context {
     AVFrame *framep[6];
     uint8_t *edge_emu_buffer_alloc;
     uint8_t *edge_emu_buffer;
-    vp56_range_coder_t c;
-    vp56_range_coder_t cc;
-    vp56_range_coder_t *ccp;
+    VP56RangeCoder c;
+    VP56RangeCoder cc;
+    VP56RangeCoder *ccp;
     int sub_version;
 
     /* frame info */
@@ -111,19 +111,19 @@ struct vp56_context {
     uint16_t dequant_ac;
 
     /* DC predictors management */
-    vp56_ref_dc_t *above_blocks;
-    vp56_ref_dc_t left_block[4];
+    VP56RefDc *above_blocks;
+    VP56RefDc left_block[4];
     int above_block_idx[6];
     DCTELEM prev_dc[3][3];    /* [plan][ref_frame] */
 
     /* blocks / macroblock */
-    vp56_mb_t mb_type;
-    vp56_macroblock_t *macroblocks;
+    VP56mb mb_type;
+    VP56Macroblock *macroblocks;
     DECLARE_ALIGNED_16(DCTELEM, block_coeff[6][64]);
 
     /* motion vectors */
-    vp56_mv_t mv[6];  /* vectors for each block in MB */
-    vp56_mv_t vector_candidate[2];
+    VP56mv mv[6];  /* vectors for each block in MB */
+    VP56mv vector_candidate[2];
     int vector_candidate_pos;
 
     /* filtering hints */
@@ -146,17 +146,17 @@ struct vp56_context {
     int stride[4];  /* stride for each plan */
 
     const uint8_t *vp56_coord_div;
-    vp56_parse_vector_adjustment_t parse_vector_adjustment;
-    vp56_adjust_t adjust;
-    vp56_filter_t filter;
-    vp56_parse_coeff_t parse_coeff;
-    vp56_default_models_init_t default_models_init;
-    vp56_parse_vector_models_t parse_vector_models;
-    vp56_parse_coeff_models_t parse_coeff_models;
-    vp56_parse_header_t parse_header;
+    VP56ParseVectorAdjustment parse_vector_adjustment;
+    VP56Adjust adjust;
+    VP56Filter filter;
+    VP56ParseCoeff parse_coeff;
+    VP56DefaultModelsInit default_models_init;
+    VP56ParseVectorModels parse_vector_models;
+    VP56ParseCoeffModels parse_coeff_models;
+    VP56ParseHeader parse_header;
 
-    vp56_model_t *modelp;
-    vp56_model_t models[2];
+    Vp56Model *modelp;
+    Vp56Model models[2];
 
     /* huffman decoding */
     int use_huffman;
@@ -170,7 +170,7 @@ struct vp56_context {
 
 void vp56_init(AVCodecContext *avctx, int flip, int has_alpha);
 int vp56_free(AVCodecContext *avctx);
-void vp56_init_dequant(vp56_context_t *s, int quantizer);
+void vp56_init_dequant(VP56Context *s, int quantizer);
 int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
                       const uint8_t *buf, int buf_size);
 
@@ -179,7 +179,7 @@ int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
  * vp56 specific range coder implementation
  */
 
-static inline void vp56_init_range_decoder(vp56_range_coder_t *c,
+static inline void vp56_init_range_decoder(VP56RangeCoder *c,
                                            const uint8_t *buf, int buf_size)
 {
     c->high = 255;
@@ -188,7 +188,7 @@ static inline void vp56_init_range_decoder(vp56_range_coder_t *c,
     c->code_word = bytestream_get_be16(&c->buffer);
 }
 
-static inline int vp56_rac_get_prob(vp56_range_coder_t *c, uint8_t prob)
+static inline int vp56_rac_get_prob(VP56RangeCoder *c, uint8_t prob)
 {
     unsigned int low = 1 + (((c->high - 1) * prob) / 256);
     unsigned int low_shift = low << 8;
@@ -213,7 +213,7 @@ static inline int vp56_rac_get_prob(vp56_range_coder_t *c, uint8_t prob)
     return bit;
 }
 
-static inline int vp56_rac_get(vp56_range_coder_t *c)
+static inline int vp56_rac_get(VP56RangeCoder *c)
 {
     /* equiprobable */
     int low = (c->high + 1) >> 1;
@@ -235,7 +235,7 @@ static inline int vp56_rac_get(vp56_range_coder_t *c)
     return bit;
 }
 
-static inline int vp56_rac_gets(vp56_range_coder_t *c, int bits)
+static inline int vp56_rac_gets(VP56RangeCoder *c, int bits)
 {
     int value = 0;
 
@@ -246,14 +246,14 @@ static inline int vp56_rac_gets(vp56_range_coder_t *c, int bits)
     return value;
 }
 
-static inline int vp56_rac_gets_nn(vp56_range_coder_t *c, int bits)
+static inline int vp56_rac_gets_nn(VP56RangeCoder *c, int bits)
 {
     int v = vp56_rac_gets(c, 7) << 1;
     return v + !v;
 }
 
-static inline int vp56_rac_get_tree(vp56_range_coder_t *c,
-                                    const vp56_tree_t *tree,
+static inline int vp56_rac_get_tree(VP56RangeCoder *c,
+                                    const VP56Tree *tree,
                                     const uint8_t *probs)
 {
     while (tree->val > 0) {
diff --git a/libavcodec/vp56data.c b/libavcodec/vp56data.c
index a7171c695c..9b98014e4b 100644
--- a/libavcodec/vp56data.c
+++ b/libavcodec/vp56data.c
@@ -44,7 +44,7 @@ const uint8_t vp56_def_mb_types_stats[3][10][2] = {
       {   1,  2 }, {   0,  1 }, {  0,   1 }, {   1,  1 }, {  0,  0 }, },
 };
 
-const vp56_tree_t vp56_pva_tree[] = {
+const VP56Tree vp56_pva_tree[] = {
     { 8, 0},
     { 4, 1},
     { 2, 2}, {-0}, {-1},
@@ -54,7 +54,7 @@ const vp56_tree_t vp56_pva_tree[] = {
     { 2, 6}, {-6}, {-7},
 };
 
-const vp56_tree_t vp56_pc_tree[] = {
+const VP56Tree vp56_pc_tree[] = {
     { 4, 6},
     { 2, 7}, {-0}, {-1},
     { 4, 8},
diff --git a/libavcodec/vp56data.h b/libavcodec/vp56data.h
index 95dc633dcd..92f2512a37 100644
--- a/libavcodec/vp56data.h
+++ b/libavcodec/vp56data.h
@@ -34,7 +34,7 @@ typedef enum {
     VP56_FRAME_GOLDEN2  = 3,
     VP56_FRAME_UNUSED   = 4,
     VP56_FRAME_UNUSED2  = 5,
-} vp56_frame_t;
+} VP56Frame;
 
 typedef enum {
     VP56_MB_INTER_NOVEC_PF = 0,  /**< Inter MB, no vector, from previous frame */
@@ -47,23 +47,23 @@ typedef enum {
     VP56_MB_INTER_4V       = 7,  /**< Inter MB, 4 vectors, from previous frame */
     VP56_MB_INTER_V1_GF    = 8,  /**< Inter MB, first vector, from golden frame */
     VP56_MB_INTER_V2_GF    = 9,  /**< Inter MB, second vector, from golden frame */
-} vp56_mb_t;
+} VP56mb;
 
 typedef struct {
   int8_t val;
   int8_t prob_idx;
-} vp56_tree_t;
+} VP56Tree;
 
 extern const uint8_t vp56_b2p[];
 extern const uint8_t vp56_b6to4[];
 extern const uint8_t vp56_coeff_parse_table[6][11];
 extern const uint8_t vp56_def_mb_types_stats[3][10][2];
-extern const vp56_tree_t vp56_pva_tree[];
-extern const vp56_tree_t vp56_pc_tree[];
+extern const VP56Tree vp56_pva_tree[];
+extern const VP56Tree vp56_pc_tree[];
 extern const uint8_t vp56_coeff_bias[];
 extern const uint8_t vp56_coeff_bit_length[];
 
-static const vp56_frame_t vp56_reference_frame[] = {
+static const VP56Frame vp56_reference_frame[] = {
     VP56_FRAME_PREVIOUS,  /* VP56_MB_INTER_NOVEC_PF */
     VP56_FRAME_CURRENT,   /* VP56_MB_INTRA */
     VP56_FRAME_PREVIOUS,  /* VP56_MB_INTER_DELTA_PF */
@@ -212,7 +212,7 @@ static const uint8_t vp56_mb_type_model_model[] = {
     171, 83, 199, 140, 125, 104,
 };
 
-static const vp56_tree_t vp56_pmbtm_tree[] = {
+static const VP56Tree vp56_pmbtm_tree[] = {
     { 4, 0},
     { 2, 1}, {-8}, {-4},
     { 8, 2},
@@ -221,7 +221,7 @@ static const vp56_tree_t vp56_pmbtm_tree[] = {
     { 2, 5}, {-24}, {-20}, {-16}, {-12}, {-0},
 };
 
-static const vp56_tree_t vp56_pmbt_tree[] = {
+static const VP56Tree vp56_pmbt_tree[] = {
     { 8, 1},
     { 4, 2},
     { 2, 4}, {-VP56_MB_INTER_NOVEC_PF}, {-VP56_MB_INTER_DELTA_PF},
diff --git a/libavcodec/vp6.c b/libavcodec/vp6.c
index bea7c9ed02..47a33ade88 100644
--- a/libavcodec/vp6.c
+++ b/libavcodec/vp6.c
@@ -37,13 +37,13 @@
 #include "vp6data.h"
 
 
-static void vp6_parse_coeff(vp56_context_t *s);
-static void vp6_parse_coeff_huffman(vp56_context_t *s);
+static void vp6_parse_coeff(VP56Context *s);
+static void vp6_parse_coeff_huffman(VP56Context *s);
 
-static int vp6_parse_header(vp56_context_t *s, const uint8_t *buf, int buf_size,
+static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size,
                             int *golden_frame)
 {
-    vp56_range_coder_t *c = &s->c;
+    VP56RangeCoder *c = &s->c;
     int parse_filter_info = 0;
     int coeff_offset = 0;
     int vrt_shift = 0;
@@ -151,7 +151,7 @@ static int vp6_parse_header(vp56_context_t *s, const uint8_t *buf, int buf_size,
     return res;
 }
 
-static void vp6_coeff_order_table_init(vp56_context_t *s)
+static void vp6_coeff_order_table_init(VP56Context *s)
 {
     int i, pos, idx = 1;
 
@@ -162,9 +162,9 @@ static void vp6_coeff_order_table_init(vp56_context_t *s)
                 s->modelp->coeff_index_to_pos[idx++] = pos;
 }
 
-static void vp6_default_models_init(vp56_context_t *s)
+static void vp6_default_models_init(VP56Context *s)
 {
-    vp56_model_t *model = s->modelp;
+    Vp56Model *model = s->modelp;
 
     model->vector_dct[0] = 0xA2;
     model->vector_dct[1] = 0xA4;
@@ -180,10 +180,10 @@ static void vp6_default_models_init(vp56_context_t *s)
     vp6_coeff_order_table_init(s);
 }
 
-static void vp6_parse_vector_models(vp56_context_t *s)
+static void vp6_parse_vector_models(VP56Context *s)
 {
-    vp56_range_coder_t *c = &s->c;
-    vp56_model_t *model = s->modelp;
+    VP56RangeCoder *c = &s->c;
+    Vp56Model *model = s->modelp;
     int comp, node;
 
     for (comp=0; comp<2; comp++) {
@@ -211,7 +211,7 @@ static int vp6_huff_cmp(const void *va, const void *vb)
     return (a->count - b->count)*16 + (b->sym - a->sym);
 }
 
-static void vp6_build_huff_tree(vp56_context_t *s, uint8_t coeff_model[],
+static void vp6_build_huff_tree(VP56Context *s, uint8_t coeff_model[],
                                 const uint8_t *map, unsigned size, VLC *vlc)
 {
     Node nodes[2*size], *tmp = &nodes[size];
@@ -231,10 +231,10 @@ static void vp6_build_huff_tree(vp56_context_t *s, uint8_t coeff_model[],
                        FF_HUFFMAN_FLAG_HNODE_FIRST);
 }
 
-static void vp6_parse_coeff_models(vp56_context_t *s)
+static void vp6_parse_coeff_models(VP56Context *s)
 {
-    vp56_range_coder_t *c = &s->c;
-    vp56_model_t *model = s->modelp;
+    VP56RangeCoder *c = &s->c;
+    Vp56Model *model = s->modelp;
     int def_prob[11];
     int node, cg, ctx, pos;
     int ct;    /* code type */
@@ -296,13 +296,13 @@ static void vp6_parse_coeff_models(vp56_context_t *s)
     }
 }
 
-static void vp6_parse_vector_adjustment(vp56_context_t *s, vp56_mv_t *vect)
+static void vp6_parse_vector_adjustment(VP56Context *s, VP56mv *vect)
 {
-    vp56_range_coder_t *c = &s->c;
-    vp56_model_t *model = s->modelp;
+    VP56RangeCoder *c = &s->c;
+    Vp56Model *model = s->modelp;
     int comp;
 
-    *vect = (vp56_mv_t) {0,0};
+    *vect = (VP56mv) {0,0};
     if (s->vector_candidate_pos < 2)
         *vect = s->vector_candidate[0];
 
@@ -338,7 +338,7 @@ static void vp6_parse_vector_adjustment(vp56_context_t *s, vp56_mv_t *vect)
  * Read number of consecutive blocks with null DC or AC.
  * This value is < 74.
  */
-static unsigned vp6_get_nb_null(vp56_context_t *s)
+static unsigned vp6_get_nb_null(VP56Context *s)
 {
     unsigned val = get_bits(&s->gb, 2);
     if (val == 2)
@@ -350,9 +350,9 @@ static unsigned vp6_get_nb_null(vp56_context_t *s)
     return val;
 }
 
-static void vp6_parse_coeff_huffman(vp56_context_t *s)
+static void vp6_parse_coeff_huffman(VP56Context *s)
 {
-    vp56_model_t *model = s->modelp;
+    Vp56Model *model = s->modelp;
     uint8_t *permute = s->scantable.permutated;
     VLC *vlc_coeff;
     int coeff, sign, coeff_idx;
@@ -405,10 +405,10 @@ static void vp6_parse_coeff_huffman(vp56_context_t *s)
     }
 }
 
-static void vp6_parse_coeff(vp56_context_t *s)
+static void vp6_parse_coeff(VP56Context *s)
 {
-    vp56_range_coder_t *c = s->ccp;
-    vp56_model_t *model = s->modelp;
+    VP56RangeCoder *c = s->ccp;
+    Vp56Model *model = s->modelp;
     uint8_t *permute = s->scantable.permutated;
     uint8_t *model1, *model2, *model3;
     int coeff, sign, coeff_idx;
@@ -522,7 +522,7 @@ static void vp6_filter_hv4(uint8_t *dst, uint8_t *src, int stride,
     }
 }
 
-static void vp6_filter_diag2(vp56_context_t *s, uint8_t *dst, uint8_t *src,
+static void vp6_filter_diag2(VP56Context *s, uint8_t *dst, uint8_t *src,
                              int stride, int h_weight, int v_weight)
 {
     uint8_t *tmp = s->edge_emu_buffer+16;
@@ -563,9 +563,9 @@ static void vp6_filter_diag4(uint8_t *dst, uint8_t *src, int stride,
     }
 }
 
-static void vp6_filter(vp56_context_t *s, uint8_t *dst, uint8_t *src,
+static void vp6_filter(VP56Context *s, uint8_t *dst, uint8_t *src,
                        int offset1, int offset2, int stride,
-                       vp56_mv_t mv, int mask, int select, int luma)
+                       VP56mv mv, int mask, int select, int luma)
 {
     int filter4 = 0;
     int x8 = mv.x & mask;
@@ -615,7 +615,7 @@ static void vp6_filter(vp56_context_t *s, uint8_t *dst, uint8_t *src,
 
 static av_cold int vp6_decode_init(AVCodecContext *avctx)
 {
-    vp56_context_t *s = avctx->priv_data;
+    VP56Context *s = avctx->priv_data;
 
     vp56_init(avctx, avctx->codec->id == CODEC_ID_VP6,
                      avctx->codec->id == CODEC_ID_VP6A);
@@ -635,7 +635,7 @@ AVCodec vp6_decoder = {
     "vp6",
     CODEC_TYPE_VIDEO,
     CODEC_ID_VP6,
-    sizeof(vp56_context_t),
+    sizeof(VP56Context),
     vp6_decode_init,
     NULL,
     vp56_free,
@@ -649,7 +649,7 @@ AVCodec vp6f_decoder = {
     "vp6f",
     CODEC_TYPE_VIDEO,
     CODEC_ID_VP6F,
-    sizeof(vp56_context_t),
+    sizeof(VP56Context),
     vp6_decode_init,
     NULL,
     vp56_free,
@@ -663,7 +663,7 @@ AVCodec vp6a_decoder = {
     "vp6a",
     CODEC_TYPE_VIDEO,
     CODEC_ID_VP6A,
-    sizeof(vp56_context_t),
+    sizeof(VP56Context),
     vp6_decode_init,
     NULL,
     vp56_free,
diff --git a/libavcodec/vp6data.h b/libavcodec/vp6data.h
index 31d6c98cdb..f57115c0a0 100644
--- a/libavcodec/vp6data.h
+++ b/libavcodec/vp6data.h
@@ -283,7 +283,7 @@ static const int16_t vp6_block_copy_filter[17][8][4] = {
     {  -2,  16, 118,  -4  } },
 };
 
-static const vp56_tree_t vp6_pcr_tree[] = {
+static const VP56Tree vp6_pcr_tree[] = {
     { 8, 0},
     { 4, 1},
     { 2, 2}, {-1}, {-2},