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Try out new flags for building only AVIF encoder/decoder

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See the discussion in https://github.com/AOMediaCodec/libavif/issues/254 where this was implemented.

This allows us to avoid using ERROR_ON_UNDEFINED_SYMBOLS and build a truly separate encoder/decoder libs.
This commit is contained in:
Ingvar Stepanyan
2020-10-30 22:53:56 +00:00
committed by Ingvar Stepanyan
parent cc6ea9e11c
commit f523db6403
9 changed files with 239 additions and 240 deletions
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16
codecs/avif/dec/avif_dec.cpp
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@@ -8,15 +8,10 @@ thread_local const val Uint8ClampedArray = val::global("Uint8ClampedArray");
thread_local const val ImageData = val::global("ImageData");
val decode(std::string avifimage) {
// point raw.data and raw.size to the contents of an .avif(s)
avifROData raw = {
.data = (uint8_t*)avifimage.c_str(),
.size = avifimage.length()
};
avifImage* image = avifImageCreateEmpty();
avifDecoder* decoder = avifDecoderCreate();
avifResult decodeResult = avifDecoderRead(decoder, image, &raw);
avifResult decodeResult =
avifDecoderReadMemory(decoder, image, (uint8_t*)avifimage.c_str(), avifimage.length());
// image is an independent copy of decoded data, decoder may be destroyed here
avifDecoderDestroy(decoder);
@@ -25,7 +20,8 @@ val decode(std::string avifimage) {
if (decodeResult == AVIF_RESULT_OK) {
// Convert to interleaved RGB(A)/BGR(A) using a libavif-allocated buffer.
avifRGBImage rgb;
avifRGBImageSetDefaults(&rgb, image); // Defaults to AVIF_RGB_FORMAT_RGBA which is what we want.
avifRGBImageSetDefaults(&rgb,
image); // Defaults to AVIF_RGB_FORMAT_RGBA which is what we want.
rgb.depth = 8; // Does not need to match image->depth. We always want 8-bit pixels.
avifRGBImageAllocatePixels(&rgb);
@@ -33,7 +29,9 @@ val decode(std::string avifimage) {
// We want to create a *copy* of the decoded data to be owned by the JavaScript side.
// For that, we perform `new Uint8Array(wasmMemBuffer, wasmPtr, wasmSize).slice()`:
result = ImageData.new_(Uint8ClampedArray.new_(typed_memory_view(rgb.rowBytes * rgb.height, rgb.pixels)), rgb.width, rgb.height);
result = ImageData.new_(
Uint8ClampedArray.new_(typed_memory_view(rgb.rowBytes * rgb.height, rgb.pixels)), rgb.width,
rgb.height);
// Now we can safely free the RGB pixels:
avifRGBImageFreePixels(&rgb);