brotli_alloc
state->encoder = BrotliEncoderCreateInstance(brotli_alloc, brotli_free, NULL);
state->decoder = BrotliDecoderCreateInstance(brotli_alloc, brotli_free, NULL);
ctx->decode.state = BrotliDecoderCreateInstance(brotli_alloc, brotli_free, NULL);
ctx->encode.state = BrotliEncoderCreateInstance(brotli_alloc, brotli_free, NULL);