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avfilter/formats: Avoid code duplication when merging samplerates

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Right now, ff_merge_samplerates() contains three instances of the
MERGE_REF() macro, a macro which reallocates an array, updates some
pointers in a loop and frees several buffers. This commit makes it
possible to contain only one instance of said macro in the function,
thereby reducing codesize.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-08-14 00:18:09 +02:00
parent 621e2625e0
commit 363f93460f
1 changed files with 17 additions and 14 deletions
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31
libavfilter/formats.c
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@ -56,11 +56,21 @@ do { \
/**
* Add all formats common to a and b to a, add b's refs to a and destroy b.
* If empty_allowed is set and one of a,b->nb is zero, the lists are
* merged; otherwise, it is treated as error.
*/
#define MERGE_FORMATS(a, b, fmts, nb, type, fail_statement) \
#define MERGE_FORMATS(a, b, fmts, nb, type, fail_statement, empty_allowed) \
do { \
int i, j, k = 0; \
int i, j, k = 0, skip = 0; \
\
if (empty_allowed) { \
if (!a->nb || !b->nb) { \
if (!a->nb) \
FFSWAP(type *, a, b); \
skip = 1; \
} \
} \
if (!skip) { \
for (i = 0; i < a->nb; i++) \
for (j = 0; j < b->nb; j++) \
if (a->fmts[i] == b->fmts[j]) { \
@ -72,7 +82,8 @@ do {
if (!k) \
{ fail_statement } \
a->nb = k; \
\
} \
\
MERGE_REF(a, b, fmts, type, fail_statement); \
} while (0)
@ -110,7 +121,7 @@ AVFilterFormats *ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b,
if (alpha2 > alpha1 || chroma2 > chroma1)
return NULL;
MERGE_FORMATS(a, b, formats, nb_formats, AVFilterFormats, return NULL;);
MERGE_FORMATS(a, b, formats, nb_formats, AVFilterFormats, return NULL;, 0);
return a;
}
@ -120,16 +131,8 @@ AVFilterFormats *ff_merge_samplerates(AVFilterFormats *a,
{
if (a == b) return a;
if (a->nb_formats && b->nb_formats) {
MERGE_FORMATS(a, b, formats, nb_formats, AVFilterFormats, return NULL;);
return a;
} else if (a->nb_formats) {
MERGE_REF(a, b, formats, AVFilterFormats, return NULL;);
return a;
} else {
MERGE_REF(b, a, formats, AVFilterFormats, return NULL;);
return b;
}
MERGE_FORMATS(a, b, formats, nb_formats, AVFilterFormats, return NULL;, 1);
return a;
}
AVFilterChannelLayouts *ff_merge_channel_layouts(AVFilterChannelLayouts *a,