From fd53f6745e1fd0741f5d9d3aa7d5484cfd98f8ed Mon Sep 17 00:00:00 2001 From: Andreas Rheinhardt Date: Thu, 20 Jun 2019 01:45:11 +0200 Subject: [PATCH] cbs: Remove useless initializations Up until now, a temporary variable was used and initialized every time a value was read in CBS; if reading turned out to be successfull, this value was overwritten (without having ever been looked at) with the value read if reading was successfull; on failure the variable wasn't touched either. Therefore these initializations can be and have been removed. Signed-off-by: Andreas Rheinhardt (cherry picked from commit b71a0367a6e763d631b8dcd608f98d42c05fa57c) --- libavcodec/cbs_av1.c | 14 +++++++------- libavcodec/cbs_h2645.c | 8 ++++---- libavcodec/cbs_jpeg.c | 2 +- libavcodec/cbs_mpeg2.c | 2 +- libavcodec/cbs_vp9.c | 8 ++++---- 5 files changed, 17 insertions(+), 17 deletions(-) diff --git a/libavcodec/cbs_av1.c b/libavcodec/cbs_av1.c index ffb68adcd3..472f21ea46 100644 --- a/libavcodec/cbs_av1.c +++ b/libavcodec/cbs_av1.c @@ -574,7 +574,7 @@ static size_t cbs_av1_get_payload_bytes_left(GetBitContext *gbc) #define RWContext GetBitContext #define xf(width, name, var, range_min, range_max, subs, ...) do { \ - uint32_t value = range_min; \ + uint32_t value; \ CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ @@ -582,7 +582,7 @@ static size_t cbs_av1_get_payload_bytes_left(GetBitContext *gbc) } while (0) #define xsu(width, name, var, subs, ...) do { \ - int32_t value = 0; \ + int32_t value; \ CHECK(ff_cbs_read_signed(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), &value, \ MIN_INT_BITS(width), \ @@ -591,27 +591,27 @@ static size_t cbs_av1_get_payload_bytes_left(GetBitContext *gbc) } while (0) #define uvlc(name, range_min, range_max) do { \ - uint32_t value = range_min; \ + uint32_t value; \ CHECK(cbs_av1_read_uvlc(ctx, rw, #name, \ &value, range_min, range_max)); \ current->name = value; \ } while (0) #define ns(max_value, name, subs, ...) do { \ - uint32_t value = 0; \ + uint32_t value; \ CHECK(cbs_av1_read_ns(ctx, rw, max_value, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), &value)); \ current->name = value; \ } while (0) #define increment(name, min, max) do { \ - uint32_t value = 0; \ + uint32_t value; \ CHECK(cbs_av1_read_increment(ctx, rw, min, max, #name, &value)); \ current->name = value; \ } while (0) #define subexp(name, max, subs, ...) do { \ - uint32_t value = 0; \ + uint32_t value; \ CHECK(cbs_av1_read_subexp(ctx, rw, max, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), &value)); \ current->name = value; \ @@ -629,7 +629,7 @@ static size_t cbs_av1_get_payload_bytes_left(GetBitContext *gbc) } while (0) #define leb128(name) do { \ - uint64_t value = 0; \ + uint64_t value; \ CHECK(cbs_av1_read_leb128(ctx, rw, #name, &value)); \ current->name = value; \ } while (0) diff --git a/libavcodec/cbs_h2645.c b/libavcodec/cbs_h2645.c index e272b0bcf6..1964ccf766 100644 --- a/libavcodec/cbs_h2645.c +++ b/libavcodec/cbs_h2645.c @@ -289,28 +289,28 @@ static int cbs_write_se_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc, #define RWContext GetBitContext #define xu(width, name, var, range_min, range_max, subs, ...) do { \ - uint32_t value = range_min; \ + uint32_t value; \ CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ var = value; \ } while (0) #define xue(name, var, range_min, range_max, subs, ...) do { \ - uint32_t value = range_min; \ + uint32_t value; \ CHECK(cbs_read_ue_golomb(ctx, rw, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ var = value; \ } while (0) #define xi(width, name, var, range_min, range_max, subs, ...) do { \ - int32_t value = range_min; \ + int32_t value; \ CHECK(ff_cbs_read_signed(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ var = value; \ } while (0) #define xse(name, var, range_min, range_max, subs, ...) do { \ - int32_t value = range_min; \ + int32_t value; \ CHECK(cbs_read_se_golomb(ctx, rw, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ diff --git a/libavcodec/cbs_jpeg.c b/libavcodec/cbs_jpeg.c index faa8301d4f..95d2344bb0 100644 --- a/libavcodec/cbs_jpeg.c +++ b/libavcodec/cbs_jpeg.c @@ -45,7 +45,7 @@ #define FUNC(name) cbs_jpeg_read_ ## name #define xu(width, name, range_min, range_max, subs, ...) do { \ - uint32_t value = range_min; \ + uint32_t value; \ CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ diff --git a/libavcodec/cbs_mpeg2.c b/libavcodec/cbs_mpeg2.c index 5a7e105177..a1ccd76b58 100644 --- a/libavcodec/cbs_mpeg2.c +++ b/libavcodec/cbs_mpeg2.c @@ -57,7 +57,7 @@ #define RWContext GetBitContext #define xui(width, name, var, range_min, range_max, subs, ...) do { \ - uint32_t value = 0; \ + uint32_t value; \ CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ diff --git a/libavcodec/cbs_vp9.c b/libavcodec/cbs_vp9.c index fa42d17982..7bfbd36df1 100644 --- a/libavcodec/cbs_vp9.c +++ b/libavcodec/cbs_vp9.c @@ -267,14 +267,14 @@ static int cbs_vp9_write_le(CodedBitstreamContext *ctx, PutBitContext *pbc, #define RWContext GetBitContext #define xf(width, name, var, subs, ...) do { \ - uint32_t value = 0; \ + uint32_t value; \ CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, 0, (1 << width) - 1)); \ var = value; \ } while (0) #define xs(width, name, var, subs, ...) do { \ - int32_t value = 0; \ + int32_t value; \ CHECK(cbs_vp9_read_s(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), &value)); \ var = value; \ @@ -282,7 +282,7 @@ static int cbs_vp9_write_le(CodedBitstreamContext *ctx, PutBitContext *pbc, #define increment(name, min, max) do { \ - uint32_t value = 0; \ + uint32_t value; \ CHECK(cbs_vp9_read_increment(ctx, rw, min, max, #name, &value)); \ current->name = value; \ } while (0) @@ -315,7 +315,7 @@ static int cbs_vp9_write_le(CodedBitstreamContext *ctx, PutBitContext *pbc, } while (0) #define fixed(width, name, value) do { \ - av_unused uint32_t fixed_value = value; \ + av_unused uint32_t fixed_value; \ CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \ 0, &fixed_value, value, value)); \ } while (0)