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Have AVIF_FALSE and AVIF_TRUE be enums #2712

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Have AVIF_FALSE and AVIF_TRUE be enums #2712

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8bd272f
Have AVIF_FALSE and AVIF_TRUE be enums
vrabaud Mar 28, 2025
e9d5df0
Use typedef for enum
vrabaud Mar 31, 2025
eef44ef
Add AVIF_ASSERT_NOT_REACHED_OR_RETURN macro
vrabaud Mar 31, 2025
da6062e
Fixes according to comments and add CI
vrabaud Mar 31, 2025
279e267
Revert change to only happen in CI
vrabaud Apr 4, 2025
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16 changes: 14 additions & 2 deletions .github/workflows/ci-c-warnings.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -16,10 +16,10 @@ jobs:
strategy:
fail-fast: false
# Generate the configurations:
# case 0: nodiscard
# case 0: nodiscard, case 1: use stdbool, case 2: use enums
matrix:
os: [ubuntu-latest, windows-latest]
case: [0]
case: [0, 1, 2]

runs-on: ${{ matrix.os }}

Expand Down Expand Up @@ -53,6 +53,18 @@ jobs:
- name: Enable nodiscard
if: ${{ matrix.case == 0}}
run: echo "CMAKE_AVIF_FLAGS=\"-DAVIF_ENABLE_NODISCARD=ON\"" >> $GITHUB_ENV
- name: Use stdbool for AVIF_TRUE/AVIF_FALSE
if: ${{ matrix.case == 1}}
run: |
sed -i 's/#include <stdint.h>/#include <stdint.h>\n#include <stdbool.h>/' include/avif/avif.h
sed -i 's/typedef int avifBool;/typedef bool avifBool;/' include/avif/avif.h
sed -i 's/#define AVIF_TRUE 1/#define AVIF_TRUE true/' include/avif/avif.h
sed -i 's/#define AVIF_FALSE 0/#define AVIF_FALSE false/' include/avif/avif.h
- name: Use enums for AVIF_TRUE/AVIF_FALSE
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@wantehchang wantehchang Apr 4, 2025

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Do we also need this alternative definition? Does stdbool not catch all the bugs?

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@vrabaud vrabaud Apr 4, 2025

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Nope, cf the other PR: both found different bugs .....

if: ${{ matrix.case == 2}}
run: |
sed -i 's/#define AVIF_TRUE 1/enum avifTrueFalse_{ AVIF_TRUE = 1,/' include/avif/avif.h
sed -i 's/#define AVIF_FALSE 0/AVIF_FALSE = 0};/' include/avif/avif.h
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@wantehchang wantehchang Apr 4, 2025

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I suggest we add these two alternative definitions of avifBool to avif.h and avoid patching avif.h like this. The alternative definitions would be guarded by macros that we define in this CI workflow.

If we want to patch avif.h, we may want to add comments around the definition of avifBool to prevent people form changing or even reformatting it.

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@vrabaud vrabaud Apr 4, 2025

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I think adding two guards (for stdbool and enum) is a lot of noise for a public header no? Especially just for a CI usage (not even a test).


- name: Prepare libavif (cmake)
run: >
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2 changes: 1 addition & 1 deletion apps/avifdec.c
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Original file line number Diff line number Diff line change
Expand Up @@ -359,7 +359,7 @@ int main(int argc, char * argv[])

const avifBool decodeAllFrames = frameIndex == DECODE_ALL_FRAMES;
int currIndex = decodeAllFrames ? 0 : frameIndex;
while (AVIF_TRUE) {
for (;;) {
result = decodeAllFrames ? avifDecoderNextImage(decoder) : avifDecoderNthImage(decoder, frameIndex);
if (result != AVIF_RESULT_OK) {
break;
Expand Down
6 changes: 6 additions & 0 deletions include/avif/internal.h
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Expand Up @@ -62,8 +62,14 @@ static inline void avifBreakOnError()
// AVIF_ASSERT_OR_RETURN() can be used instead of assert() for extra security in release builds.
#ifdef NDEBUG
#define AVIF_ASSERT_OR_RETURN(A) AVIF_CHECKERR((A), AVIF_RESULT_INTERNAL_ERROR)
#define AVIF_ASSERT_NOT_REACHED_OR_RETURN \
do { \
avifBreakOnError(); \
return AVIF_RESULT_INTERNAL_ERROR; \
} while (0)
#else
#define AVIF_ASSERT_OR_RETURN(A) assert(A)
#define AVIF_ASSERT_NOT_REACHED_OR_RETURN assert(0);
#endif

// ---------------------------------------------------------------------------
Expand Down
6 changes: 3 additions & 3 deletions src/read.c
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Expand Up @@ -3984,15 +3984,15 @@ static avifResult avifParseMovieBox(avifDecoderData * data,
static avifProperty * avifMetaCreateProperty(avifMeta * meta, const char * propertyType)
{
avifProperty * metaProperty = avifArrayPush(&meta->properties);
AVIF_CHECK(metaProperty);
AVIF_CHECKERR(metaProperty, NULL);
memcpy(metaProperty->type, propertyType, 4);
return metaProperty;
}

static avifProperty * avifDecoderItemAddProperty(avifDecoderItem * item, const avifProperty * metaProperty)
{
avifProperty * itemProperty = avifArrayPush(&item->properties);
AVIF_CHECK(itemProperty);
AVIF_CHECKERR(itemProperty, NULL);
*itemProperty = *metaProperty;
return itemProperty;
}
Expand Down Expand Up @@ -5479,7 +5479,7 @@ static avifResult avifMetaFindAlphaItem(avifMeta * meta,
for (uint32_t dimgIdx = 0; dimgIdx < tileCount; ++dimgIdx) {
if (dimgIdxToAlphaItemIdx[dimgIdx] >= meta->items.count) {
avifFree(dimgIdxToAlphaItemIdx);
AVIF_ASSERT_OR_RETURN(AVIF_FALSE);
AVIF_ASSERT_NOT_REACHED_OR_RETURN;
}
avifDecoderItem * alphaTileItem = meta->items.item[dimgIdxToAlphaItemIdx[dimgIdx]];
alphaTileItem->dimgForID = (*alphaItem)->id;
Expand Down
4 changes: 2 additions & 2 deletions src/write.c
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Expand Up @@ -2678,7 +2678,7 @@ static avifResult avifEncoderWriteMiniBox(avifEncoder * encoder, avifRWStream *

if (floatFlag) {
// bit(2) bit_depth_log2_minus4;
AVIF_ASSERT_OR_RETURN(AVIF_FALSE);
AVIF_ASSERT_NOT_REACHED_OR_RETURN;
} else {
AVIF_CHECKRES(avifRWStreamWriteBits(s, image->depth > 8, 1)); // bit(1) high_bit_depth_flag;
if (image->depth > 8) {
Expand Down Expand Up @@ -2746,7 +2746,7 @@ static avifResult avifEncoderWriteMiniBox(avifEncoder * encoder, avifRWStream *
AVIF_CHECKRES(avifRWStreamWriteBits(s, gainmapFloatFlag, 1)); // bit(1) gainmap_float_flag;
if (gainmapFloatFlag) {
// bit(2) gainmap_bit_depth_log2_minus4;
AVIF_ASSERT_OR_RETURN(AVIF_FALSE);
AVIF_ASSERT_NOT_REACHED_OR_RETURN;
} else {
AVIF_CHECKRES(avifRWStreamWriteBits(s, gainmap->depth > 8, 1)); // bit(1) gainmap_high_bit_depth_flag;
if (gainmap->depth > 8) {
Expand Down
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