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avutil/tree: add additional const qualifier to the comparator

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libc's qsort comparator has a const qualifier on both arguments. This
adds a missing const qualifier to exactly match the comparator API.

Existing usages of av_tree_find, av_tree_insert are appropriately
modified: type signature changes of the comparators, and removal of
unnecessary void * casts of function pointers.

Reviewed-by: Henrik Gramner <henrik@gramner.com>
Reviewed-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
This commit is contained in:
Ganesh Ajjanagadde 2015-10-24 17:53:21 -04:00
parent 94f333f9dc
commit 7c8fcbbde3
8 changed files with 20 additions and 18 deletions
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2
libavfilter/vf_drawtext.c
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@ -288,7 +288,7 @@ typedef struct Glyph {
int bitmap_top;
} Glyph;
static int glyph_cmp(void *key, const void *b)
static int glyph_cmp(const void *key, const void *b)
{
const Glyph *a = key, *bb = b;
int64_t diff = (int64_t)a->code - (int64_t)bb->code;

4
libavformat/cache.c
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@ -65,9 +65,9 @@ typedef struct Context {
int read_ahead_limit;
} Context;
static int cmp(void *key, const void *node)
static int cmp(const void *key, const void *node)
{
return (*(int64_t *) key) - ((const CacheEntry *) node)->logical_pos;
return (*(const int64_t *) key) - ((const CacheEntry *) node)->logical_pos;
}
static int cache_open(URLContext *h, const char *arg, int flags, AVDictionary **options)

12
libavformat/nut.c
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@ -237,14 +237,16 @@ int64_t ff_lsb2full(StreamContext *stream, int64_t lsb)
return ((lsb - delta) & mask) + delta;
}
int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b)
int ff_nut_sp_pos_cmp(const void *a, const void *b)
{
return ((a->pos - b->pos) >> 32) - ((b->pos - a->pos) >> 32);
const Syncpoint *va = a, *vb = b;
return ((va->pos - vb->pos) >> 32) - ((vb->pos - va->pos) >> 32);
}
int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b)
int ff_nut_sp_pts_cmp(const void *a, const void *b)
{
return ((a->ts - b->ts) >> 32) - ((b->ts - a->ts) >> 32);
const Syncpoint *va = a, *vb = b;
return ((va->ts - vb->ts) >> 32) - ((vb->ts - va->ts) >> 32);
}
int ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts)
@ -263,7 +265,7 @@ int ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts)
sp->pos = pos;
sp->back_ptr = back_ptr;
sp->ts = ts;
av_tree_insert(&nut->syncpoints, sp, (void *) ff_nut_sp_pos_cmp, &node);
av_tree_insert(&nut->syncpoints, sp, ff_nut_sp_pos_cmp, &node);
if (node) {
av_free(sp);
av_free(node);

4
libavformat/nut.h
View File

@ -132,8 +132,8 @@ typedef struct Dispositions {
void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val);
int64_t ff_lsb2full(StreamContext *stream, int64_t lsb);
int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b);
int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b);
int ff_nut_sp_pos_cmp(const void *a, const void *b);
int ff_nut_sp_pts_cmp(const void *a, const void *b);
int ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts);
void ff_nut_free_sp(NUTContext *nut);

6
libavformat/nutdec.c
View File

@ -1271,7 +1271,7 @@ static int read_seek(AVFormatContext *s, int stream_index,
pos2 = st->index_entries[index].pos;
ts = st->index_entries[index].timestamp;
} else {
av_tree_find(nut->syncpoints, &dummy, (void *) ff_nut_sp_pts_cmp,
av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pts_cmp,
(void **) next_node);
av_log(s, AV_LOG_DEBUG, "%"PRIu64"-%"PRIu64" %"PRId64"-%"PRId64"\n",
next_node[0]->pos, next_node[1]->pos, next_node[0]->ts,
@ -1286,7 +1286,7 @@ static int read_seek(AVFormatContext *s, int stream_index,
if (!(flags & AVSEEK_FLAG_BACKWARD)) {
dummy.pos = pos + 16;
next_node[1] = &nopts_sp;
av_tree_find(nut->syncpoints, &dummy, (void *) ff_nut_sp_pos_cmp,
av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pos_cmp,
(void **) next_node);
pos2 = ff_gen_search(s, -2, dummy.pos, next_node[0]->pos,
next_node[1]->pos, next_node[1]->pos,
@ -1297,7 +1297,7 @@ static int read_seek(AVFormatContext *s, int stream_index,
// FIXME dir but I think it does not matter
}
dummy.pos = pos;
sp = av_tree_find(nut->syncpoints, &dummy, (void *) ff_nut_sp_pos_cmp,
sp = av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pos_cmp,
NULL);
av_assert0(sp);

2
libavformat/nutenc.c
View File

@ -587,7 +587,7 @@ static int write_index(NUTContext *nut, AVIOContext *bc) {
ff_put_v(bc, nut->sp_count);
for (i=0; i<nut->sp_count; i++) {
av_tree_find(nut->syncpoints, &dummy, (void *) ff_nut_sp_pos_cmp, (void**)next_node);
av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pos_cmp, (void**)next_node);
ff_put_v(bc, (next_node[1]->pos >> 4) - (dummy.pos>>4));
dummy.pos = next_node[1]->pos;
}

4
libavutil/tree.c
View File

@ -37,7 +37,7 @@ struct AVTreeNode *av_tree_node_alloc(void)
}
void *av_tree_find(const AVTreeNode *t, void *key,
int (*cmp)(void *key, const void *b), void *next[2])
int (*cmp)(const void *key, const void *b), void *next[2])
{
if (t) {
unsigned int v = cmp(key, t->elem);
@ -57,7 +57,7 @@ void *av_tree_find(const AVTreeNode *t, void *key,
}
void *av_tree_insert(AVTreeNode **tp, void *key,
int (*cmp)(void *key, const void *b), AVTreeNode **next)
int (*cmp)(const void *key, const void *b), AVTreeNode **next)
{
AVTreeNode *t = *tp;
if (t) {

4
libavutil/tree.h
View File

@ -62,7 +62,7 @@ struct AVTreeNode *av_tree_node_alloc(void);
* exists in the tree.
*/
void *av_tree_find(const struct AVTreeNode *root, void *key,
int (*cmp)(void *key, const void *b), void *next[2]);
int (*cmp)(const void *key, const void *b), void *next[2]);
/**
* Insert or remove an element.
@ -109,7 +109,7 @@ void *av_tree_find(const struct AVTreeNode *root, void *key,
* should make no assumptions that it's one or the other in the code.
*/
void *av_tree_insert(struct AVTreeNode **rootp, void *key,
int (*cmp)(void *key, const void *b),
int (*cmp)(const void *key, const void *b),
struct AVTreeNode **next);
void av_tree_destroy(struct AVTreeNode *t);