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WebPDecodeYUV: check u/v/stride/uv_stride ptrs

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The buffers are made mandatory to match WebPDecodeYUVInto(), though this
conflicts with WebPIDecGetYUVA().

spotted by Oliver Kunz (okunz at google dot com)

Change-Id: Ic4740c53b75da6b93d4f3462303fb9be0ebfbd48
This commit is contained in:
James Zern
2023-06-12 22:04:33 +00:00
parent 8e965ccb0f
commit 59a2b1f9e3
2 changed files with 22 additions and 14 deletions
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31
src/dec/webp_dec.c
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@ -658,19 +658,26 @@ uint8_t* WebPDecodeBGRA(const uint8_t* data, size_t data_size,
uint8_t* WebPDecodeYUV(const uint8_t* data, size_t data_size,
int* width, int* height, uint8_t** u, uint8_t** v,
int* stride, int* uv_stride) {
WebPDecBuffer output; // only to preserve the side-infos
uint8_t* const out = Decode(MODE_YUV, data, data_size,
width, height, &output);
if (out != NULL) {
const WebPYUVABuffer* const buf = &output.u.YUVA;
*u = buf->u;
*v = buf->v;
*stride = buf->y_stride;
*uv_stride = buf->u_stride;
assert(buf->u_stride == buf->v_stride);
// data, width and height are checked by Decode().
if (u == NULL || v == NULL || stride == NULL || uv_stride == NULL) {
return NULL;
}
{
WebPDecBuffer output; // only to preserve the side-infos
uint8_t* const out = Decode(MODE_YUV, data, data_size,
width, height, &output);
if (out != NULL) {
const WebPYUVABuffer* const buf = &output.u.YUVA;
*u = buf->u;
*v = buf->v;
*stride = buf->y_stride;
*uv_stride = buf->u_stride;
assert(buf->u_stride == buf->v_stride);
}
return out;
}
return out;
}
static void DefaultFeatures(WebPBitstreamFeatures* const features) {