[FFmpeg-devel] [PATCH v2 05/13] lavc/vulkan/common: sign-ify lengths

[Lynne]

This makes left_bits return useful data rather than overflowing, and
also saves some 64-bit integer operations, which is still always a plus sadly.
---
 libavcodec/vulkan/common.comp         | 22 +++++++++++-----------
 libavcodec/vulkan/ffv1_dec_setup.comp |  2 +-
 libavcodec/vulkan/ffv1_vlc.comp       |  4 ++--
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/libavcodec/vulkan/common.comp b/libavcodec/vulkan/common.comp
index 10af9c0623..6825693fa3 100644
--- a/libavcodec/vulkan/common.comp
+++ b/libavcodec/vulkan/common.comp
@@ -193,8 +193,8 @@ struct GetBitContext {
     uint64_t buf_end;
 
     uint64_t bits;
-    uint bits_valid;
-    uint size_in_bits;
+    int bits_valid;
+    int size_in_bits;
 };
 
 #define LOAD64()                                       \
@@ -216,11 +216,11 @@ struct GetBitContext {
         gb.bits_valid += 32;                                      \
     }
 
-void init_get_bits(inout GetBitContext gb, u8buf data, uint64_t len)
+void init_get_bits(inout GetBitContext gb, u8buf data, int len)
 {
     gb.buf = gb.buf_start = uint64_t(data);
     gb.buf_end = uint64_t(data) + len;
-    gb.size_in_bits = uint(len) * 8;
+    gb.size_in_bits = len * 8;
 
     /* Preload */
     LOAD64()
@@ -237,7 +237,7 @@ bool get_bit(inout GetBitContext gb)
     return val;
 }
 
-uint get_bits(inout GetBitContext gb, uint n)
+uint get_bits(inout GetBitContext gb, int n)
 {
     if (n == 0)
         return 0;
@@ -251,7 +251,7 @@ uint get_bits(inout GetBitContext gb, uint n)
     return val;
 }
 
-uint show_bits(inout GetBitContext gb, uint n)
+uint show_bits(inout GetBitContext gb, int n)
 {
     if (n > gb.bits_valid)
         RELOAD32()
@@ -259,7 +259,7 @@ uint show_bits(inout GetBitContext gb, uint n)
     return uint(gb.bits >> (64 - n));
 }
 
-void skip_bits(inout GetBitContext gb, uint n)
+void skip_bits(inout GetBitContext gb, int n)
 {
     if (n > gb.bits_valid)
         RELOAD32()
@@ -268,12 +268,12 @@ void skip_bits(inout GetBitContext gb, uint n)
     gb.bits_valid -= n;
 }
 
-uint tell_bits(in GetBitContext gb)
+int tell_bits(in GetBitContext gb)
 {
-    return uint(gb.buf - gb.buf_start) * 8 - gb.bits_valid;
+    return int(gb.buf - gb.buf_start) * 8 - gb.bits_valid;
 }
 
-uint left_bits(in GetBitContext gb)
+int left_bits(in GetBitContext gb)
 {
-    return gb.size_in_bits - uint(gb.buf - gb.buf_start) * 8 + gb.bits_valid;
+    return gb.size_in_bits - int(gb.buf - gb.buf_start) * 8 + gb.bits_valid;
 }
diff --git a/libavcodec/vulkan/ffv1_dec_setup.comp b/libavcodec/vulkan/ffv1_dec_setup.comp
index 671f28e7e7..5da09df21c 100644
--- a/libavcodec/vulkan/ffv1_dec_setup.comp
+++ b/libavcodec/vulkan/ffv1_dec_setup.comp
@@ -107,7 +107,7 @@ void golomb_init(inout SliceContext sc)
 
     uint64_t ac_byte_count = sc.c.bytestream - sc.c.bytestream_start - 1;
     init_get_bits(sc.gb, u8buf(sc.c.bytestream_start + ac_byte_count),
-                  sc.c.bytestream_end - sc.c.bytestream_start - ac_byte_count);
+                  int(sc.c.bytestream_end - sc.c.bytestream_start - ac_byte_count));
 }
 
 void main(void)
diff --git a/libavcodec/vulkan/ffv1_vlc.comp b/libavcodec/vulkan/ffv1_vlc.comp
index d374e5a069..32a6ca9f37 100644
--- a/libavcodec/vulkan/ffv1_vlc.comp
+++ b/libavcodec/vulkan/ffv1_vlc.comp
@@ -121,7 +121,7 @@ Symbol get_vlc_symbol(inout VlcState state, int v, int bits)
     return set_sr_golomb(code, k, 12, bits);
 }
 
-uint get_ur_golomb(inout GetBitContext gb, uint k, int limit, int esc_len)
+uint get_ur_golomb(inout GetBitContext gb, int k, int limit, int esc_len)
 {
     for (uint i = 0; i < 12; i++)
         if (get_bit(gb))
@@ -130,7 +130,7 @@ uint get_ur_golomb(inout GetBitContext gb, uint k, int limit, int esc_len)
     return get_bits(gb, esc_len) + 11;
 }
 
-int get_sr_golomb(inout GetBitContext gb, uint k, int limit, int esc_len)
+int get_sr_golomb(inout GetBitContext gb, int k, int limit, int esc_len)
 {
     int v = int(get_ur_golomb(gb, k, limit, esc_len));
     return (v >> 1) ^ -(v & 1);
-- 
2.50.0